c460950 Use purego-cef2gtk CEF rendering bridge · dumber

M .gitignore +2 -1


@@ -84,10 +84,11 @@ CLAUDE.local.md
84	84		memory/
85	85		notes/
86	86		docs/plans/
87		-	scripts/
	87	+	scripts/*
88	88		!scripts/generate-types.js
89	89		!scripts/verify_purego_only.sh
90	90		!scripts/stress_omnibox_callbacks.go
	91	+	!scripts/cef-gpu-diagnostics.sh
91	92		specs/
92	93		templates/
93	94		.serena/


@@ -84,10 +84,11 @@ CLAUDE.local.md
84		memory/	84		memory/
85		notes/	85		notes/
86		docs/plans/	86		docs/plans/
87	-	scripts/	87	+	scripts/*
88		!scripts/generate-types.js	88		!scripts/generate-types.js
89		!scripts/verify_purego_only.sh	89		!scripts/verify_purego_only.sh
90		!scripts/stress_omnibox_callbacks.go	90		!scripts/stress_omnibox_callbacks.go
			91	+	!scripts/cef-gpu-diagnostics.sh
91		specs/	92		specs/
92		templates/	93		templates/
93		.serena/	94		.serena/

M README.md +2 -0


@@ -101,6 +101,8 @@ CEF_DIR=/custom/path dumber browse
101	101
102	102		Then set `engine.type = "cef"` in your config.
103	103
	104	+	CEF uses Dumber's GPU-first Wayland render stack by default: GDK DMABUF presentation with ANGLE/GSK Vulkan. You normally do not need render environment variables or helper scripts. For diagnostics only, set `DUMBER_RENDER_STACK=legacy-gl` to use the older GtkGLArea/OpenGL bridge, or `DUMBER_RENDER_STACK=vulkan-dmabuf` to force the default explicitly.
	105	+
104	106		## Keyboard-Driven
105	107
106	108		Four modal modes. Enter a mode, act, escape out. Vim and Zellij users already know this pattern.


@@ -101,6 +101,8 @@ CEF_DIR=/custom/path dumber browse
101		101
102	Then set `engine.type = "cef"` in your config.	102		Then set `engine.type = "cef"` in your config.
103		103
		104	+	CEF uses Dumber's GPU-first Wayland render stack by default: GDK DMABUF presentation with ANGLE/GSK Vulkan. You normally do not need render environment variables or helper scripts. For diagnostics only, set `DUMBER_RENDER_STACK=legacy-gl` to use the older GtkGLArea/OpenGL bridge, or `DUMBER_RENDER_STACK=vulkan-dmabuf` to force the default explicitly.
		105	+
104	## Keyboard-Driven	106		## Keyboard-Driven
105		107
106	Four modal modes. Enter a mode, act, escape out. Vim and Zellij users already know this pattern.	108		Four modal modes. Enter a mode, act, escape out. Vim and Zellij users already know this pattern.

M cmd/dumber/main.go +9 -0


@@ -199,6 +199,7 @@ func runGUI(cfg *config.Config) int {
199	199		timer.Mark("config")
200	200
201	201		ctx := initStartupContextWithTrace(cfg)
	202	+	applyCEFRenderStackDefault(ctx, cfg)
202	203		timer.Mark("logger")
203	204		bootstrapLog := logging.FromContext(ctx)
204	205

@@ -273,6 +274,7 @@ func runStandaloneOmnibox() int {
273	274		cfg := initConfig()
274	275		configureBrowserLaunchRelay(cfg)
275	276		ctx := initStartupContextWithTrace(cfg)
	277	+	applyCEFRenderStackDefault(ctx, cfg)
276	278
277	279		initResult, err := runParallelInitPhase(ctx, cfg)
278	280		if err != nil {

@@ -320,6 +322,13 @@ func runStandaloneOmnibox() int {
320	322		return ui.RunStandaloneOmnibox(ctx, runtimeCfg)
321	323		}
322	324
	325	+	func applyCEFRenderStackDefault(ctx context.Context, cfg *config.Config) {
	326	+	if cfg == nil \|\| cfg.Engine.ResolveEngineType() != config.EngineTypeCEF {
	327	+	return
	328	+	}
	329	+	infracef.ApplyDefaultRenderStackEnvironment(ctx)
	330	+	}
	331	+
323	332		func preInitializeAdwaitaForCEF(cfg config.Config, initResult bootstrap.ParallelInitResult, initAdwaita func()) {
324	333		if cfg == nil \|\| initResult == nil \|\| initAdwaita == nil {
325	334		return


@@ -199,6 +199,7 @@ func runGUI(cfg *config.Config) int {
199	timer.Mark("config")	199		timer.Mark("config")
200		200
201	ctx := initStartupContextWithTrace(cfg)	201		ctx := initStartupContextWithTrace(cfg)
		202	+	applyCEFRenderStackDefault(ctx, cfg)
202	timer.Mark("logger")	203		timer.Mark("logger")
203	bootstrapLog := logging.FromContext(ctx)	204		bootstrapLog := logging.FromContext(ctx)
204		205

@@ -273,6 +274,7 @@ func runStandaloneOmnibox() int {
273	cfg := initConfig()	274		cfg := initConfig()
274	configureBrowserLaunchRelay(cfg)	275		configureBrowserLaunchRelay(cfg)
275	ctx := initStartupContextWithTrace(cfg)	276		ctx := initStartupContextWithTrace(cfg)
		277	+	applyCEFRenderStackDefault(ctx, cfg)
276		278
277	initResult, err := runParallelInitPhase(ctx, cfg)	279		initResult, err := runParallelInitPhase(ctx, cfg)
278	if err != nil {	280		if err != nil {

@@ -320,6 +322,13 @@ func runStandaloneOmnibox() int {
320	return ui.RunStandaloneOmnibox(ctx, runtimeCfg)	322		return ui.RunStandaloneOmnibox(ctx, runtimeCfg)
321	}	323		}
322		324
		325	+	func applyCEFRenderStackDefault(ctx context.Context, cfg *config.Config) {
		326	+	if cfg == nil \|\| cfg.Engine.ResolveEngineType() != config.EngineTypeCEF {
		327	+	return
		328	+	}
		329	+	infracef.ApplyDefaultRenderStackEnvironment(ctx)
		330	+	}
		331	+
323	func preInitializeAdwaitaForCEF(cfg config.Config, initResult bootstrap.ParallelInitResult, initAdwaita func()) {	332		func preInitializeAdwaitaForCEF(cfg config.Config, initResult bootstrap.ParallelInitResult, initAdwaita func()) {
324	if cfg == nil \|\| initResult == nil \|\| initAdwaita == nil {	333		if cfg == nil \|\| initResult == nil \|\| initAdwaita == nil {
325	return	334		return

M docs/config/index.md +4 -1


@@ -690,8 +690,11 @@ All config values can be overridden via environment variables with the prefix `D
690	690		DUMBER_DATABASE_PATH=/custom/path/db.sqlite
691	691
692	692		# Rendering (examples)
693		-	# Defaults: rendering.disable_dmabuf_renderer=false, rendering.gsk_renderer="auto"
	693	+	# CEF defaults to the GPU-first Vulkan DMABUF stack.
	694	+	# Use legacy-gl only as a diagnostic fallback.
	695	+	# DUMBER_RENDER_STACK=legacy-gl
694	696		DUMBER_RENDERING_MODE=cpu
	697	+	# WebKit-specific rendering overrides:
695	698		# DUMBER_RENDERING_DISABLE_DMABUF_RENDERER=true
696	699		# DUMBER_RENDERING_GSK_RENDERER=opengl
697	700		DUMBER_DEFAULT_WEBPAGE_ZOOM=1.5

 DUMBER_DATABASE_PATH=/custom/path/db.sqlite
 # Rendering (examples)
-# Defaults: rendering.disable_dmabuf_renderer=false, rendering.gsk_renderer="auto"
+# CEF defaults to the GPU-first Vulkan DMABUF stack.
+# Use legacy-gl only as a diagnostic fallback.
+# DUMBER_RENDER_STACK=legacy-gl
 DUMBER_RENDERING_MODE=cpu
+# WebKit-specific rendering overrides:
 # DUMBER_RENDERING_DISABLE_DMABUF_RENDERER=true
 # DUMBER_RENDERING_GSK_RENDERER=opengl
 DUMBER_DEFAULT_WEBPAGE_ZOOM=1.5

M docs/reference/configuration.md +1 -0


@@ -59,6 +59,7 @@
59	59		\| `rendering.show_fps` \| bool \| `false` \| \|
60	60		\| `rendering.sample_memory` \| bool \| `false` \| \|
61	61		\| `rendering.debug_frames` \| bool \| `false` \| \|
	62	+	\| `DUMBER_RENDER_STACK` env \| string \| `auto` \| `auto`, `vulkan-dmabuf`, `legacy-gl` \|
62	63		\| `default_ui_scale` \| float \| `1.0` \| > 0 \|
63	64		\| `default_webpage_zoom` \| float \| `1.2` \| > 0 \|
64	65		\| `workspace.new_pane_url` \| string \| `about:blank` \| \|


@@ -59,6 +59,7 @@
59	\| `rendering.show_fps` \| bool \| `false` \| \|	59		\| `rendering.show_fps` \| bool \| `false` \| \|
60	\| `rendering.sample_memory` \| bool \| `false` \| \|	60		\| `rendering.sample_memory` \| bool \| `false` \| \|
61	\| `rendering.debug_frames` \| bool \| `false` \| \|	61		\| `rendering.debug_frames` \| bool \| `false` \| \|
		62	+	\| `DUMBER_RENDER_STACK` env \| string \| `auto` \| `auto`, `vulkan-dmabuf`, `legacy-gl` \|
62	\| `default_ui_scale` \| float \| `1.0` \| > 0 \|	63		\| `default_ui_scale` \| float \| `1.0` \| > 0 \|
63	\| `default_webpage_zoom` \| float \| `1.2` \| > 0 \|	64		\| `default_webpage_zoom` \| float \| `1.2` \| > 0 \|
64	\| `workspace.new_pane_url` \| string \| `about:blank` \| \|	65		\| `workspace.new_pane_url` \| string \| `about:blank` \| \|

M docs/reference/dependencies.md +4 -0


@@ -71,6 +71,10 @@ sudo pacman -S gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugl
71	71		sudo pacman -S vulkan-tools # for vulkaninfo
72	72		```
73	73
	74	+	### CEF Wayland rendering
	75	+
	76	+	When `engine.type = "cef"`, Dumber defaults to the GPU-first Wayland stack: GDK DMABUF presentation with ANGLE/GSK Vulkan. No launch wrapper or render environment variables are required for normal use. Set `DUMBER_RENDER_STACK=legacy-gl` only when diagnosing the older GtkGLArea/OpenGL fallback path.
	77	+
74	78		## Debian/Ubuntu
75	79
76	80		### Core GTK4 and WebKit


@@ -71,6 +71,10 @@ sudo pacman -S gst-plugins-base gst-plugins-good gst-plugins-bad gst-plugins-ugl
71	sudo pacman -S vulkan-tools # for vulkaninfo	71		sudo pacman -S vulkan-tools # for vulkaninfo
72	```	72		```
73		73
		74	+	### CEF Wayland rendering
		75	+
		76	+	When `engine.type = "cef"`, Dumber defaults to the GPU-first Wayland stack: GDK DMABUF presentation with ANGLE/GSK Vulkan. No launch wrapper or render environment variables are required for normal use. Set `DUMBER_RENDER_STACK=legacy-gl` only when diagnosing the older GtkGLArea/OpenGL fallback path.
		77	+
74	## Debian/Ubuntu	78		## Debian/Ubuntu
75		79
76	### Core GTK4 and WebKit	80		### Core GTK4 and WebKit

M go.mod +2 -0


@@ -81,3 +81,5 @@ require (
81	81		replace github.com/bnema/purego-cef2gtk => ../purego-cef2gtk
82	82
83	83		tool github.com/a-h/templ/cmd/templ
	84	+
	85	+	replace github.com/bnema/purego-pipewire => ../purego-pipewire


@@ -81,3 +81,5 @@ require (
81	replace github.com/bnema/purego-cef2gtk => ../purego-cef2gtk	81		replace github.com/bnema/purego-cef2gtk => ../purego-cef2gtk
82		82
83	tool github.com/a-h/templ/cmd/templ	83		tool github.com/a-h/templ/cmd/templ
		84	+
		85	+	replace github.com/bnema/purego-pipewire => ../purego-pipewire

M internal/bootstrap/engine.go +3 -2


@@ -95,8 +95,9 @@ func BuildEngine(input EngineInput) (port.Engine, error) {
95	95		}
96	96		audioFactory := audiofactory.NewAudioOutputFactory()
97	97		return cef.NewEngine(input.Ctx, opts, cef.RuntimePaths{
98		-	StateRoot: profile.CEFUserDataDir(),
99		-	LogFile: profile.CEFLogFile(),
	98	+	StateRoot: profile.CEFUserDataDir(),
	99	+	LogFile: profile.CEFLogFile(),
	100	+	ProfileLogDir: profile.Shared.LogDir,
100	101		}, cefCfg, audioFactory, deps)
101	102		default:
102	103		return nil, fmt.Errorf("unknown engine type: %q", engineType)

 		}
 		audioFactory := audiofactory.NewAudioOutputFactory()
 		return cef.NewEngine(input.Ctx, opts, cef.RuntimePaths{
-			StateRoot: profile.CEFUserDataDir(),
+			StateRoot:     profile.CEFUserDataDir(),
-			LogFile:   profile.CEFLogFile(),
+			LogFile:       profile.CEFLogFile(),
+			ProfileLogDir: profile.Shared.LogDir,
 		}, cefCfg, audioFactory, deps)
 	default:
 		return nil, fmt.Errorf("unknown engine type: %q", engineType)

M internal/bootstrap/session.go +5 -1


@@ -118,7 +118,11 @@ func StartBrowserSession(
118	118		logger.Info().Str("log_file", logPath).Msg("session log file")
119	119		}
120	120
121		-	sessionCtx := corelogging.WithContext(context.Background(), logger)
	121	+	sessionCtx := corelogging.WithSessionMetadata(
	122	+	corelogging.WithContext(context.Background(), logger),
	123	+	string(session.ID),
	124	+	logPath,
	125	+	)
122	126
123	127		bs := &BrowserSession{
124	128		Session: session,

 		logger.Info().Str("log_file", logPath).Msg("session log file")
 	}
-	sessionCtx := corelogging.WithContext(context.Background(), logger)
+	sessionCtx := corelogging.WithSessionMetadata(
+		corelogging.WithContext(context.Background(), logger),
+		string(session.ID),
+		logPath,
+	)
 	bs := &BrowserSession{
 		Session:    session,

M internal/infrastructure/cef/app.go +89 -0

@@ -1,6 +1,7 @@
1	1		package cef
2	2
3	3		import (
	4	+	"os"
4	5		"strings"
5	6
6	7		purecef "github.com/bnema/purego-cef/cef"

@@ -11,6 +12,7 @@ import (
11	12
12	13		const (
13	14		dumbSchemeName = "dumb"
	15	+	chromiumEnableFeaturesSwitch = "enable-features"
14	16		chromiumDisableFeaturesSwitch = "disable-features"
15	17		chromiumDisableBlinkFeaturesSwitch = "disable-blink-features"
16	18		)

@@ -56,9 +58,96 @@ func configureCommandLine(commandLine purecef.CommandLine) {
56	58		// Chromium blocks them, showing an infinite spinner.
57	59		commandLine.AppendSwitchWithValue("autoplay-policy", "no-user-gesture-required")
58	60
	61	+	configureHardwareVideoDecode(commandLine)
	62	+	configureEnvChromiumFlags(commandLine)
59	63		configureWebAuthnFeaturePolicy(commandLine)
60	64		}
61	65
	66	+	func configureHardwareVideoDecode(commandLine purecef.CommandLine) {
	67	+	if commandLine == nil \|\| !envBoolEnabled(cefEnableVAAPIEnvVar) {
	68	+	return
	69	+	}
	70	+
	71	+	appendUniqueCommaSeparatedSwitchValues(commandLine, chromiumEnableFeaturesSwitch,
	72	+	"AcceleratedVideoDecoder",
	73	+	"AcceleratedVideoDecodeLinuxGL",
	74	+	"AcceleratedVideoDecodeLinuxZeroCopyGL",
	75	+	"VaapiIgnoreDriverChecks",
	76	+	)
	77	+	appendSwitchIfMissing(commandLine, "ignore-gpu-blocklist")
	78	+	appendSwitchIfMissing(commandLine, "enable-zero-copy")
	79	+	}
	80	+
	81	+	func configureEnvChromiumFlags(commandLine purecef.CommandLine) {
	82	+	if commandLine == nil {
	83	+	return
	84	+	}
	85	+
	86	+	for _, token := range parseChromiumFlagsEnv(os.Getenv(cefChromiumFlagsEnvVar)) {
	87	+	applyChromiumFlagToken(commandLine, token)
	88	+	}
	89	+	}
	90	+
	91	+	func parseChromiumFlagsEnv(raw string) []string {
	92	+	// Reuse Dumber's command-line tokenizer so developer env flags can contain
	93	+	// quoted values without adding a second shell-like parser in the CEF adapter.
	94	+	return parseRelaunchCommandLineArgs(raw)
	95	+	}
	96	+
	97	+	func applyChromiumFlagToken(commandLine purecef.CommandLine, token string) {
	98	+	if commandLine == nil {
	99	+	return
	100	+	}
	101	+	token = strings.TrimSpace(token)
	102	+	if token == "" \|\| token == "--" {
	103	+	return
	104	+	}
	105	+	name, value, ok := parseChromiumSwitchToken(token)
	106	+	if !ok {
	107	+	return
	108	+	}
	109	+
	110	+	switch name {
	111	+	case chromiumEnableFeaturesSwitch, chromiumDisableFeaturesSwitch, chromiumDisableBlinkFeaturesSwitch:
	112	+	appendUniqueCommaSeparatedSwitchValues(commandLine, name, strings.Split(value, ",")...)
	113	+	default:
	114	+	if value == "" {
	115	+	appendSwitchIfMissing(commandLine, name)
	116	+	return
	117	+	}
	118	+	commandLine.AppendSwitchWithValue(name, value)
	119	+	}
	120	+	}
	121	+
	122	+	func parseChromiumSwitchToken(token string) (name, value string, ok bool) {
	123	+	token = strings.TrimSpace(token)
	124	+	if token == "" {
	125	+	return "", "", false
	126	+	}
	127	+
	128	+	switch {
	129	+	case strings.HasPrefix(token, "--"):
	130	+	token = strings.TrimPrefix(token, "--")
	131	+	case strings.HasPrefix(token, "-"):
	132	+	token = strings.TrimPrefix(token, "-")
	133	+	default:
	134	+	return "", "", false
	135	+	}
	136	+
	137	+	if token == "" \|\| strings.HasPrefix(token, "-") {
	138	+	return "", "", false
	139	+	}
	140	+	name, value, found := strings.Cut(token, "=")
	141	+	name = strings.TrimSpace(name)
	142	+	if name == "" {
	143	+	return "", "", false
	144	+	}
	145	+	if !found {
	146	+	return name, "", true
	147	+	}
	148	+	return name, value, true
	149	+	}
	150	+
62	151		func configureWebAuthnFeaturePolicy(commandLine purecef.CommandLine) {
63	152		if commandLine == nil {
64	153		return

@@ -1,6 +1,7 @@
1	package cef	1		package cef
2		2
3	import (	3		import (
		4	+	"os"
4	"strings"	5		"strings"
5		6
6	purecef "github.com/bnema/purego-cef/cef"	7		purecef "github.com/bnema/purego-cef/cef"

@@ -11,6 +12,7 @@ import (
11		12
12	const (	13		const (
13	dumbSchemeName = "dumb"	14		dumbSchemeName = "dumb"
		15	+	chromiumEnableFeaturesSwitch = "enable-features"
14	chromiumDisableFeaturesSwitch = "disable-features"	16		chromiumDisableFeaturesSwitch = "disable-features"
15	chromiumDisableBlinkFeaturesSwitch = "disable-blink-features"	17		chromiumDisableBlinkFeaturesSwitch = "disable-blink-features"
16	)	18		)

@@ -56,9 +58,96 @@ func configureCommandLine(commandLine purecef.CommandLine) {
56	// Chromium blocks them, showing an infinite spinner.	58		// Chromium blocks them, showing an infinite spinner.
57	commandLine.AppendSwitchWithValue("autoplay-policy", "no-user-gesture-required")	59		commandLine.AppendSwitchWithValue("autoplay-policy", "no-user-gesture-required")
58		60
		61	+	configureHardwareVideoDecode(commandLine)
		62	+	configureEnvChromiumFlags(commandLine)
59	configureWebAuthnFeaturePolicy(commandLine)	63		configureWebAuthnFeaturePolicy(commandLine)
60	}	64		}
61		65
		66	+	func configureHardwareVideoDecode(commandLine purecef.CommandLine) {
		67	+	if commandLine == nil \|\| !envBoolEnabled(cefEnableVAAPIEnvVar) {
		68	+	return
		69	+	}
		70	+
		71	+	appendUniqueCommaSeparatedSwitchValues(commandLine, chromiumEnableFeaturesSwitch,
		72	+	"AcceleratedVideoDecoder",
		73	+	"AcceleratedVideoDecodeLinuxGL",
		74	+	"AcceleratedVideoDecodeLinuxZeroCopyGL",
		75	+	"VaapiIgnoreDriverChecks",
		76	+	)
		77	+	appendSwitchIfMissing(commandLine, "ignore-gpu-blocklist")
		78	+	appendSwitchIfMissing(commandLine, "enable-zero-copy")
		79	+	}
		80	+
		81	+	func configureEnvChromiumFlags(commandLine purecef.CommandLine) {
		82	+	if commandLine == nil {
		83	+	return
		84	+	}
		85	+
		86	+	for _, token := range parseChromiumFlagsEnv(os.Getenv(cefChromiumFlagsEnvVar)) {
		87	+	applyChromiumFlagToken(commandLine, token)
		88	+	}
		89	+	}
		90	+
		91	+	func parseChromiumFlagsEnv(raw string) []string {
		92	+	// Reuse Dumber's command-line tokenizer so developer env flags can contain
		93	+	// quoted values without adding a second shell-like parser in the CEF adapter.
		94	+	return parseRelaunchCommandLineArgs(raw)
		95	+	}
		96	+
		97	+	func applyChromiumFlagToken(commandLine purecef.CommandLine, token string) {
		98	+	if commandLine == nil {
		99	+	return
		100	+	}
		101	+	token = strings.TrimSpace(token)
		102	+	if token == "" \|\| token == "--" {
		103	+	return
		104	+	}
		105	+	name, value, ok := parseChromiumSwitchToken(token)
		106	+	if !ok {
		107	+	return
		108	+	}
		109	+
		110	+	switch name {
		111	+	case chromiumEnableFeaturesSwitch, chromiumDisableFeaturesSwitch, chromiumDisableBlinkFeaturesSwitch:
		112	+	appendUniqueCommaSeparatedSwitchValues(commandLine, name, strings.Split(value, ",")...)
		113	+	default:
		114	+	if value == "" {
		115	+	appendSwitchIfMissing(commandLine, name)
		116	+	return
		117	+	}
		118	+	commandLine.AppendSwitchWithValue(name, value)
		119	+	}
		120	+	}
		121	+
		122	+	func parseChromiumSwitchToken(token string) (name, value string, ok bool) {
		123	+	token = strings.TrimSpace(token)
		124	+	if token == "" {
		125	+	return "", "", false
		126	+	}
		127	+
		128	+	switch {
		129	+	case strings.HasPrefix(token, "--"):
		130	+	token = strings.TrimPrefix(token, "--")
		131	+	case strings.HasPrefix(token, "-"):
		132	+	token = strings.TrimPrefix(token, "-")
		133	+	default:
		134	+	return "", "", false
		135	+	}
		136	+
		137	+	if token == "" \|\| strings.HasPrefix(token, "-") {
		138	+	return "", "", false
		139	+	}
		140	+	name, value, found := strings.Cut(token, "=")
		141	+	name = strings.TrimSpace(name)
		142	+	if name == "" {
		143	+	return "", "", false
		144	+	}
		145	+	if !found {
		146	+	return name, "", true
		147	+	}
		148	+	return name, value, true
		149	+	}
		150	+
62	func configureWebAuthnFeaturePolicy(commandLine purecef.CommandLine) {	151		func configureWebAuthnFeaturePolicy(commandLine purecef.CommandLine) {
63	if commandLine == nil {	152		if commandLine == nil {
64	return	153		return

M internal/infrastructure/cef/app_test.go +71 -0


@@ -297,6 +297,77 @@ func TestConfigureCommandLine_PreservesExistingOzonePlatform(t *testing.T) {
297	297		}
298	298		}
299	299
	300	+	func TestConfigureCommandLine_EnableVAAPIEnvAppendsHardwareDecodeFlags(t *testing.T) {
	301	+	t.Setenv(cefEnableVAAPIEnvVar, "1")
	302	+
	303	+	commandLine := newMutableCommandLineStub()
	304	+	commandLine.AppendSwitchWithValue(chromiumEnableFeaturesSwitch, "ExistingFeature")
	305	+
	306	+	configureCommandLine(commandLine)
	307	+
	308	+	if got := commandLine.GetSwitchValue(chromiumEnableFeaturesSwitch); got != "ExistingFeature,AcceleratedVideoDecoder,AcceleratedVideoDecodeLinuxGL,AcceleratedVideoDecodeLinuxZeroCopyGL,VaapiIgnoreDriverChecks" {
	309	+	t.Fatalf("enable-features = %q, want VAAPI features appended", got)
	310	+	}
	311	+	if !commandLine.HasSwitch("ignore-gpu-blocklist") {
	312	+	t.Fatal("expected ignore-gpu-blocklist switch")
	313	+	}
	314	+	if !commandLine.HasSwitch("enable-zero-copy") {
	315	+	t.Fatal("expected enable-zero-copy switch")
	316	+	}
	317	+	}
	318	+
	319	+	func TestConfigureCommandLine_ChromiumFlagsEnvAppendsSwitches(t *testing.T) {
	320	+	t.Setenv(cefChromiumFlagsEnvVar, `--enable-features=VaapiVideoDecoder,VaapiIgnoreDriverChecks --ignore-gpu-blocklist --autoplay-policy=document-user-activation-required ignored-arg`)
	321	+
	322	+	commandLine := newMutableCommandLineStub()
	323	+	commandLine.AppendSwitchWithValue(chromiumEnableFeaturesSwitch, "ExistingFeature")
	324	+
	325	+	configureCommandLine(commandLine)
	326	+
	327	+	if got := commandLine.GetSwitchValue(chromiumEnableFeaturesSwitch); got != "ExistingFeature,VaapiVideoDecoder,VaapiIgnoreDriverChecks" {
	328	+	t.Fatalf("enable-features = %q, want env features appended", got)
	329	+	}
	330	+	if !commandLine.HasSwitch("ignore-gpu-blocklist") {
	331	+	t.Fatal("expected ignore-gpu-blocklist switch")
	332	+	}
	333	+	if got := commandLine.GetSwitchValue("autoplay-policy"); got != "document-user-activation-required" {
	334	+	t.Fatalf("autoplay-policy = %q, want env override", got)
	335	+	}
	336	+	if commandLine.HasSwitch("ignored-arg") {
	337	+	t.Fatal("non-switch env token should be ignored")
	338	+	}
	339	+	}
	340	+
	341	+	func TestParseChromiumSwitchToken(t *testing.T) {
	342	+	t.Parallel()
	343	+
	344	+	tests := []struct {
	345	+	name string
	346	+	token string
	347	+	wantName string
	348	+	wantValue string
	349	+	wantOK bool
	350	+	}{
	351	+	{name: "long switch with value", token: "--enable-features=VaapiVideoDecoder", wantName: "enable-features", wantValue: "VaapiVideoDecoder", wantOK: true},
	352	+	{name: "long switch without value", token: "--ignore-gpu-blocklist", wantName: "ignore-gpu-blocklist", wantOK: true},
	353	+	{name: "single dash switch", token: "-enable-zero-copy", wantName: "enable-zero-copy", wantOK: true},
	354	+	{name: "empty value", token: "--flag=", wantName: "flag", wantOK: true},
	355	+	{name: "embedded equals", token: "--flag=a=b", wantName: "flag", wantValue: "a=b", wantOK: true},
	356	+	{name: "non switch", token: "youtube.com", wantOK: false},
	357	+	{name: "sentinel", token: "--", wantOK: false},
	358	+	{name: "empty", token: " ", wantOK: false},
	359	+	}
	360	+
	361	+	for _, tt := range tests {
	362	+	t.Run(tt.name, func(t *testing.T) {
	363	+	gotName, gotValue, gotOK := parseChromiumSwitchToken(tt.token)
	364	+	if gotName != tt.wantName \|\| gotValue != tt.wantValue \|\| gotOK != tt.wantOK {
	365	+	t.Fatalf("parseChromiumSwitchToken(%q) = (%q, %q, %v), want (%q, %q, %v)", tt.token, gotName, gotValue, gotOK, tt.wantName, tt.wantValue, tt.wantOK)
	366	+	}
	367	+	})
	368	+	}
	369	+	}
	370	+
300	371		func TestAppendUniqueCommaSeparatedSwitchValues(t *testing.T) {
301	372		t.Run("trims whitespace and skips empty existing values", func(t *testing.T) {
302	373		commandLine := newMutableCommandLineStub()


@@ -297,6 +297,77 @@ func TestConfigureCommandLine_PreservesExistingOzonePlatform(t *testing.T) {
297	}	297		}
298	}	298		}
299		299
		300	+	func TestConfigureCommandLine_EnableVAAPIEnvAppendsHardwareDecodeFlags(t *testing.T) {
		301	+	t.Setenv(cefEnableVAAPIEnvVar, "1")
		302	+
		303	+	commandLine := newMutableCommandLineStub()
		304	+	commandLine.AppendSwitchWithValue(chromiumEnableFeaturesSwitch, "ExistingFeature")
		305	+
		306	+	configureCommandLine(commandLine)
		307	+
		308	+	if got := commandLine.GetSwitchValue(chromiumEnableFeaturesSwitch); got != "ExistingFeature,AcceleratedVideoDecoder,AcceleratedVideoDecodeLinuxGL,AcceleratedVideoDecodeLinuxZeroCopyGL,VaapiIgnoreDriverChecks" {
		309	+	t.Fatalf("enable-features = %q, want VAAPI features appended", got)
		310	+	}
		311	+	if !commandLine.HasSwitch("ignore-gpu-blocklist") {
		312	+	t.Fatal("expected ignore-gpu-blocklist switch")
		313	+	}
		314	+	if !commandLine.HasSwitch("enable-zero-copy") {
		315	+	t.Fatal("expected enable-zero-copy switch")
		316	+	}
		317	+	}
		318	+
		319	+	func TestConfigureCommandLine_ChromiumFlagsEnvAppendsSwitches(t *testing.T) {
		320	+	t.Setenv(cefChromiumFlagsEnvVar, `--enable-features=VaapiVideoDecoder,VaapiIgnoreDriverChecks --ignore-gpu-blocklist --autoplay-policy=document-user-activation-required ignored-arg`)
		321	+
		322	+	commandLine := newMutableCommandLineStub()
		323	+	commandLine.AppendSwitchWithValue(chromiumEnableFeaturesSwitch, "ExistingFeature")
		324	+
		325	+	configureCommandLine(commandLine)
		326	+
		327	+	if got := commandLine.GetSwitchValue(chromiumEnableFeaturesSwitch); got != "ExistingFeature,VaapiVideoDecoder,VaapiIgnoreDriverChecks" {
		328	+	t.Fatalf("enable-features = %q, want env features appended", got)
		329	+	}
		330	+	if !commandLine.HasSwitch("ignore-gpu-blocklist") {
		331	+	t.Fatal("expected ignore-gpu-blocklist switch")
		332	+	}
		333	+	if got := commandLine.GetSwitchValue("autoplay-policy"); got != "document-user-activation-required" {
		334	+	t.Fatalf("autoplay-policy = %q, want env override", got)
		335	+	}
		336	+	if commandLine.HasSwitch("ignored-arg") {
		337	+	t.Fatal("non-switch env token should be ignored")
		338	+	}
		339	+	}
		340	+
		341	+	func TestParseChromiumSwitchToken(t *testing.T) {
		342	+	t.Parallel()
		343	+
		344	+	tests := []struct {
		345	+	name string
		346	+	token string
		347	+	wantName string
		348	+	wantValue string
		349	+	wantOK bool
		350	+	}{
		351	+	{name: "long switch with value", token: "--enable-features=VaapiVideoDecoder", wantName: "enable-features", wantValue: "VaapiVideoDecoder", wantOK: true},
		352	+	{name: "long switch without value", token: "--ignore-gpu-blocklist", wantName: "ignore-gpu-blocklist", wantOK: true},
		353	+	{name: "single dash switch", token: "-enable-zero-copy", wantName: "enable-zero-copy", wantOK: true},
		354	+	{name: "empty value", token: "--flag=", wantName: "flag", wantOK: true},
		355	+	{name: "embedded equals", token: "--flag=a=b", wantName: "flag", wantValue: "a=b", wantOK: true},
		356	+	{name: "non switch", token: "youtube.com", wantOK: false},
		357	+	{name: "sentinel", token: "--", wantOK: false},
		358	+	{name: "empty", token: " ", wantOK: false},
		359	+	}
		360	+
		361	+	for _, tt := range tests {
		362	+	t.Run(tt.name, func(t *testing.T) {
		363	+	gotName, gotValue, gotOK := parseChromiumSwitchToken(tt.token)
		364	+	if gotName != tt.wantName \|\| gotValue != tt.wantValue \|\| gotOK != tt.wantOK {
		365	+	t.Fatalf("parseChromiumSwitchToken(%q) = (%q, %q, %v), want (%q, %q, %v)", tt.token, gotName, gotValue, gotOK, tt.wantName, tt.wantValue, tt.wantOK)
		366	+	}
		367	+	})
		368	+	}
		369	+	}
		370	+
300	func TestAppendUniqueCommaSeparatedSwitchValues(t *testing.T) {	371		func TestAppendUniqueCommaSeparatedSwitchValues(t *testing.T) {
301	t.Run("trims whitespace and skips empty existing values", func(t *testing.T) {	372		t.Run("trims whitespace and skips empty existing values", func(t *testing.T) {
302	commandLine := newMutableCommandLineStub()	373		commandLine := newMutableCommandLineStub()

M internal/infrastructure/cef/cef2gtk_adapter.go +19 -11


@@ -28,8 +28,8 @@ type Cef2gtkAdapter struct {
28	28		destroyed atomic.Bool
29	29		}
30	30
31		-	// NewCef2gtkAdapter creates a GtkGLArea-backed accelerated CEF view and wraps
32		-	// it in a thin Dumber adapter.
	31	+	// NewCef2gtkAdapter creates an accelerated CEF view and wraps it in a thin
	32	+	// Dumber adapter.
33	33		func NewCef2gtkAdapter() *Cef2gtkAdapter {
34	34		v := cef2gtk.NewView()
35	35		if v == nil {

@@ -47,8 +47,8 @@ func (a Cef2gtkAdapter) Widget() gtk.Widget {
47	47		return a.view.Widget()
48	48		}
49	49
50		-	// GLArea returns the underlying GtkGLArea for signal connections (resize,
51		-	// tick, etc.). Signal connection/disconnection must happen on the GTK thread.
	50	+	// GLArea returns the underlying GtkGLArea when the GLArea backend is active.
	51	+	// It returns nil for the GDK DMABUF backend.
52	52		func (a Cef2gtkAdapter) GLArea() gtk.GLArea {
53	53		if a == nil \|\| a.destroyed.Load() \|\| a.view == nil {
54	54		return nil

@@ -56,14 +56,14 @@ func (a Cef2gtkAdapter) GLArea() gtk.GLArea {
56	56		return a.view.GLArea()
57	57		}
58	58
59		-	// NativeWidget returns the uintptr of the GLArea for embedding via
	59	+	// NativeWidget returns the uintptr of the active GTK widget for embedding via
60	60		// port.NativeWidgetProvider. Call on the GTK main thread.
61	61		func (a *Cef2gtkAdapter) NativeWidget() uintptr {
62		-	area := a.GLArea()
63		-	if area == nil {
	62	+	widget := a.Widget()
	63	+	if widget == nil {
64	64		return 0
65	65		}
66		-	return area.GoPointer()
	66	+	return widget.GoPointer()
67	67		}
68	68
69	69		// Size returns the bridge's last observed positive widget size, or 1x1 before

@@ -112,7 +112,7 @@ func (a *Cef2gtkAdapter) SetCursorFromName(name string) {
112	112		a.view.SetCursorFromName(name)
113	113		}
114	114
115		-	// PrepareOnGTKThread initializes GL/EGL resources owned by purego-cef2gtk.
	115	+	// PrepareOnGTKThread initializes renderer resources owned by purego-cef2gtk.
116	116		// Must be called on the GTK main thread.
117	117		func (a *Cef2gtkAdapter) PrepareOnGTKThread() error {
118	118		if a == nil \|\| a.destroyed.Load() \|\| a.view == nil {

@@ -123,7 +123,7 @@ func (a *Cef2gtkAdapter) PrepareOnGTKThread() error {
123	123
124	124		// RenderHandler returns a CEF render handler that delegates accelerated paint
125	125		// handling to purego-cef2gtk. The returned handler satisfies cef.RenderHandler
126		-	// and uses the bridge's DMABUF/EGL import path.
	126	+	// and uses the bridge's selected accelerated DMABUF import path.
127	127		//
128	128		// hooks may be a zero-value cef2gtk.Hooks if no custom callbacks are needed.
129	129		func (a *Cef2gtkAdapter) RenderHandler(hooks cef2gtk.Hooks) purecef.RenderHandler {

@@ -133,6 +133,14 @@ func (a *Cef2gtkAdapter) RenderHandler(hooks cef2gtk.Hooks) purecef.RenderHandle
133	133		return a.view.RenderHandler(hooks)
134	134		}
135	135
	136	+	// ConfigureProfiling enables or disables purego-cef2gtk render profiling for this view.
	137	+	func (a *Cef2gtkAdapter) ConfigureProfiling(opts cef2gtk.ProfileOptions) error {
	138	+	if a == nil \|\| a.destroyed.Load() \|\| a.view == nil {
	139	+	return ErrAdapterDestroyed
	140	+	}
	141	+	return a.view.ConfigureProfiling(opts)
	142	+	}
	143	+
136	144		// AttachInput attaches GTK event controllers to the view and forwards input
137	145		// to the given CEF browser host. Must be called on the GTK main thread.
138	146		//

@@ -172,7 +180,7 @@ func (a *Cef2gtkAdapter) Diagnostics() cef2gtk.Diagnostics {
172	180		return a.view.Diagnostics()
173	181		}
174	182
175		-	// Destroy releases GL resources owned by purego-cef2gtk and disconnects GTK
	183	+	// Destroy releases renderer resources owned by purego-cef2gtk and disconnects GTK
176	184		// signal handlers. Must be called on the GTK main thread. The atomic destroyed
177	185		// flag only communicates lifecycle state; accesses to view are not otherwise
178	186		// synchronized, so callers must ensure no concurrent adapter method is using the

 	destroyed atomic.Bool
 }
-// NewCef2gtkAdapter creates a GtkGLArea-backed accelerated CEF view and wraps
+// NewCef2gtkAdapter creates an accelerated CEF view and wraps it in a thin
-// it in a thin Dumber adapter.
+// Dumber adapter.
 func NewCef2gtkAdapter() *Cef2gtkAdapter {
 	v := cef2gtk.NewView()
 	if v == nil {
 	return a.view.Widget()
 }
-// GLArea returns the underlying GtkGLArea for signal connections (resize,
+// GLArea returns the underlying GtkGLArea when the GLArea backend is active.
-// tick, etc.). Signal connection/disconnection must happen on the GTK thread.
+// It returns nil for the GDK DMABUF backend.
 func (a *Cef2gtkAdapter) GLArea() *gtk.GLArea {
 	if a == nil || a.destroyed.Load() || a.view == nil {
 		return nil
 	return a.view.GLArea()
 }
-// NativeWidget returns the uintptr of the GLArea for embedding via
+// NativeWidget returns the uintptr of the active GTK widget for embedding via
 // port.NativeWidgetProvider. Call on the GTK main thread.
 func (a *Cef2gtkAdapter) NativeWidget() uintptr {
-	area := a.GLArea()
+	widget := a.Widget()
-	if area == nil {
+	if widget == nil {
 		return 0
 	}
-	return area.GoPointer()
+	return widget.GoPointer()
 }
 // Size returns the bridge's last observed positive widget size, or 1x1 before
 	a.view.SetCursorFromName(name)
 }
-// PrepareOnGTKThread initializes GL/EGL resources owned by purego-cef2gtk.
+// PrepareOnGTKThread initializes renderer resources owned by purego-cef2gtk.
 // Must be called on the GTK main thread.
 func (a *Cef2gtkAdapter) PrepareOnGTKThread() error {
 	if a == nil || a.destroyed.Load() || a.view == nil {
 // RenderHandler returns a CEF render handler that delegates accelerated paint
 // handling to purego-cef2gtk. The returned handler satisfies cef.RenderHandler
-// and uses the bridge's DMABUF/EGL import path.
+// and uses the bridge's selected accelerated DMABUF import path.
 //
 // hooks may be a zero-value cef2gtk.Hooks if no custom callbacks are needed.
 func (a *Cef2gtkAdapter) RenderHandler(hooks cef2gtk.Hooks) purecef.RenderHandler {
 	return a.view.RenderHandler(hooks)
 }
+// ConfigureProfiling enables or disables purego-cef2gtk render profiling for this view.
+func (a *Cef2gtkAdapter) ConfigureProfiling(opts cef2gtk.ProfileOptions) error {
+	if a == nil || a.destroyed.Load() || a.view == nil {
+		return ErrAdapterDestroyed
+	}
+	return a.view.ConfigureProfiling(opts)
+}
 // AttachInput attaches GTK event controllers to the view and forwards input
 // to the given CEF browser host. Must be called on the GTK main thread.
 //
 	return a.view.Diagnostics()
 }
-// Destroy releases GL resources owned by purego-cef2gtk and disconnects GTK
+// Destroy releases renderer resources owned by purego-cef2gtk and disconnects GTK
 // signal handlers. Must be called on the GTK main thread. The atomic destroyed
 // flag only communicates lifecycle state; accesses to view are not otherwise
 // synchronized, so callers must ensure no concurrent adapter method is using the

M internal/infrastructure/cef/context_menu.go +9 -9


@@ -76,15 +76,15 @@ func (h *handlerSet) RunContextMenu(
76	76		executor := h.contextMenuExecutor()
77	77		wv := h.wv
78	78		wv.runOnGTK(func() {
79		-	if wv.viewBridge == nil \|\| wv.viewBridge.GLArea() == nil {
	79	+	if wv.viewBridge == nil \|\| wv.viewBridge.Widget() == nil {
80	80		callback.Cancel()
81	81		return
82	82		}
83		-	glArea := wv.viewBridge.GLArea()
84		-	logContextMenuPopupRequest(h, glArea, params, x, y)
	83	+	widget := wv.viewBridge.Widget()
	84	+	logContextMenuPopupRequest(h, widget, params, x, y)
85	85		gtkmenu.NewRenderer(nil).Show(
86	86		items,
87		-	&glArea.Widget,
	87	+	widget,
88	88		x,
89	89		y,
90	90		func(item port.MenuItem) {

@@ -126,23 +126,23 @@ func contextMenuAnchorPosition(params purecef.ContextMenuParams, scale int32) (i
126	126
127	127		func logContextMenuPopupRequest(
128	128		h *handlerSet,
129		-	glArea *gtk.GLArea,
	129	+	widget *gtk.Widget,
130	130		params purecef.ContextMenuParams,
131	131		x, y int32,
132	132		) {
133		-	if h == nil \|\| h.wv == nil \|\| h.wv.ctx == nil \|\| glArea == nil {
	133	+	if h == nil \|\| h.wv == nil \|\| h.wv.ctx == nil \|\| widget == nil {
134	134		return
135	135		}
136	136		rawX, rawY := contextMenuRawPosition(params)
137		-	parent := glArea.GetParent()
	137	+	parent := widget.GetParent()
138	138		logging.FromContext(h.wv.ctx).Debug().
139	139		Int32("raw_x", rawX).
140	140		Int32("raw_y", rawY).
141	141		Int32("popup_x", x).
142	142		Int32("popup_y", y).
143	143		Int32("scale", h.wv.viewBridgeScale()).
144		-	Int("anchor_width", glArea.Widget.GetAllocatedWidth()).
145		-	Int("anchor_height", glArea.Widget.GetAllocatedHeight()).
	144	+	Int("anchor_width", widget.GetAllocatedWidth()).
	145	+	Int("anchor_height", widget.GetAllocatedHeight()).
146	146		Int("parent_width", cefWidgetAllocatedWidth(parent)).
147	147		Int("parent_height", cefWidgetAllocatedHeight(parent)).
148	148		Msg("cef: context menu popup request")


@@ -76,15 +76,15 @@ func (h *handlerSet) RunContextMenu(
76		executor := h.contextMenuExecutor()	76		executor := h.contextMenuExecutor()
77		wv := h.wv	77		wv := h.wv
78		wv.runOnGTK(func() {	78		wv.runOnGTK(func() {
79	-	if wv.viewBridge == nil \|\| wv.viewBridge.GLArea() == nil {	79	+	if wv.viewBridge == nil \|\| wv.viewBridge.Widget() == nil {
80		callback.Cancel()	80		callback.Cancel()
81		return	81		return
82		}	82		}
83	-	glArea := wv.viewBridge.GLArea()	83	+	widget := wv.viewBridge.Widget()
84	-	logContextMenuPopupRequest(h, glArea, params, x, y)	84	+	logContextMenuPopupRequest(h, widget, params, x, y)
85		gtkmenu.NewRenderer(nil).Show(	85		gtkmenu.NewRenderer(nil).Show(
86		items,	86		items,
87	-	&glArea.Widget,	87	+	widget,
88		x,	88		x,
89		y,	89		y,
90		func(item port.MenuItem) {	90		func(item port.MenuItem) {

@@ -126,23 +126,23 @@ func contextMenuAnchorPosition(params purecef.ContextMenuParams, scale int32) (i
126			126
127		func logContextMenuPopupRequest(	127		func logContextMenuPopupRequest(
128		h *handlerSet,	128		h *handlerSet,
129	-	glArea *gtk.GLArea,	129	+	widget *gtk.Widget,
130		params purecef.ContextMenuParams,	130		params purecef.ContextMenuParams,
131		x, y int32,	131		x, y int32,
132		) {	132		) {
133	-	if h == nil \|\| h.wv == nil \|\| h.wv.ctx == nil \|\| glArea == nil {	133	+	if h == nil \|\| h.wv == nil \|\| h.wv.ctx == nil \|\| widget == nil {
134		return	134		return
135		}	135		}
136		rawX, rawY := contextMenuRawPosition(params)	136		rawX, rawY := contextMenuRawPosition(params)
137	-	parent := glArea.GetParent()	137	+	parent := widget.GetParent()
138		logging.FromContext(h.wv.ctx).Debug().	138		logging.FromContext(h.wv.ctx).Debug().
139		Int32("raw_x", rawX).	139		Int32("raw_x", rawX).
140		Int32("raw_y", rawY).	140		Int32("raw_y", rawY).
141		Int32("popup_x", x).	141		Int32("popup_x", x).
142		Int32("popup_y", y).	142		Int32("popup_y", y).
143		Int32("scale", h.wv.viewBridgeScale()).	143		Int32("scale", h.wv.viewBridgeScale()).
144	-	Int("anchor_width", glArea.Widget.GetAllocatedWidth()).	144	+	Int("anchor_width", widget.GetAllocatedWidth()).
145	-	Int("anchor_height", glArea.Widget.GetAllocatedHeight()).	145	+	Int("anchor_height", widget.GetAllocatedHeight()).
146		Int("parent_width", cefWidgetAllocatedWidth(parent)).	146		Int("parent_width", cefWidgetAllocatedWidth(parent)).
147		Int("parent_height", cefWidgetAllocatedHeight(parent)).	147		Int("parent_height", cefWidgetAllocatedHeight(parent)).
148		Msg("cef: context menu popup request")	148		Msg("cef: context menu popup request")

M internal/infrastructure/cef/engine.go +11 -5


@@ -23,9 +23,10 @@ var _ port.AlreadyRunningAppRelaunchHandlerSetter = (*Engine)(nil)
23	23		// Engine implements port.Engine for the CEF browser backend.
24	24		// It manages the CEF lifecycle and provides access to all engine subsystems.
25	25		type Engine struct {
26		-	ctx context.Context
27		-	factory *WebViewFactory
28		-	pool *WebViewPool
	26	+	ctx context.Context
	27	+	factory *WebViewFactory
	28	+	pool *WebViewPool
	29	+	profileLogDir string
29	30
30	31		messageRouter *MessageRouter
31	32		schemeHandler *dumbSchemeHandler

@@ -55,6 +56,12 @@ type Engine struct {
55	56		// during shutdown, replacing the busy-wait poll in closeActiveWebViews.
56	57		shutdownNotify chan struct{}
57	58
	59	+	// Cross-layer render diagnostics.
	60	+	cefHeartbeatStop chan struct{}
	61	+	cefHeartbeatDone chan struct{}
	62	+	cefUIHeartbeat cefThreadHeartbeatState
	63	+	cefIOHeartbeat cefThreadHeartbeatState
	64	+
58	65		// Diagnostic counters.
59	66		contextInitializedCount atomic.Uint64
60	67		childLaunchRenderer atomic.Uint64

@@ -68,7 +75,6 @@ type Engine struct {
68	75		browserCreateLastWidth atomic.Int32
69	76		browserCreateLastHeight atomic.Int32
70	77		browserCreateComplete atomic.Bool
71		-
72	78		}
73	79
74	80		func (e *Engine) Factory() port.WebViewFactory {

@@ -196,6 +202,7 @@ func (e *Engine) Close() error {
196	202
197	203		e.closeActiveWebViews()
198	204		e.pool.Close()
	205	+	e.stopCEFHeartbeat()
199	206
200	207		if activeAfter := e.activeWebViewCount(); activeAfter > 0 {
201	208		log.Warn().

@@ -474,4 +481,3 @@ func (e Engine) currentDownloadHandler() downloadHandler {
474	481		defer e.downloadMu.RUnlock()
475	482		return e.downloadHandler
476	483		}
477		-

 // Engine implements port.Engine for the CEF browser backend.
 // It manages the CEF lifecycle and provides access to all engine subsystems.
 type Engine struct {
-	ctx     context.Context
+	ctx           context.Context
-	factory *WebViewFactory
+	factory       *WebViewFactory
-	pool    *WebViewPool
+	pool          *WebViewPool
+	profileLogDir string
 	messageRouter *MessageRouter
 	schemeHandler *dumbSchemeHandler
 	// during shutdown, replacing the busy-wait poll in closeActiveWebViews.
 	shutdownNotify chan struct{}
+	// Cross-layer render diagnostics.
+	cefHeartbeatStop chan struct{}
+	cefHeartbeatDone chan struct{}
+	cefUIHeartbeat   cefThreadHeartbeatState
+	cefIOHeartbeat   cefThreadHeartbeatState
 	// Diagnostic counters.
 	contextInitializedCount atomic.Uint64
 	childLaunchRenderer     atomic.Uint64
 	browserCreateLastWidth  atomic.Int32
 	browserCreateLastHeight atomic.Int32
 	browserCreateComplete   atomic.Bool
 }
 func (e *Engine) Factory() port.WebViewFactory {
 	e.closeActiveWebViews()
 	e.pool.Close()
+	e.stopCEFHeartbeat()
 	if activeAfter := e.activeWebViewCount(); activeAfter > 0 {
 		log.Warn().
 	defer e.downloadMu.RUnlock()
 	return e.downloadHandler
 }

M internal/infrastructure/cef/engine_init.go +5 -2


@@ -26,8 +26,9 @@ const CEFRootCachePathEnvVar = "DUMBER_CEF_ROOT_CACHE_PATH"
26	26
27	27		// RuntimePaths contains the concrete filesystem paths the CEF adapter needs.
28	28		type RuntimePaths struct {
29		-	StateRoot string
30		-	LogFile string
	29	+	StateRoot string
	30	+	LogFile string
	31	+	ProfileLogDir string
31	32		}
32	33
33	34		// NewEngine initializes the CEF runtime and returns a ready-to-use Engine.

@@ -56,6 +57,7 @@ func NewEngine(
56	57
57	58		eng := &Engine{
58	59		ctx: ctx,
	60	+	profileLogDir: paths.ProfileLogDir,
59	61		registerHandlers: deps.RegisterHandlers,
60	62		registerAccentHandlers: deps.RegisterAccentHandlers,
61	63		currentConfigPayload: deps.CurrentConfigPayload,

@@ -186,6 +188,7 @@ func wireEngine(
186	188		}
187	189		eng.messageRouter = messageRouter
188	190		eng.schemeHandler = schemeHandler
	191	+	eng.startCEFHeartbeat()
189	192
190	193		registerEngineSchemeFactories(logger, purecef.NewSchemeHandlerFactory(schemeHandler))
191	194		return eng, nil

 // RuntimePaths contains the concrete filesystem paths the CEF adapter needs.
 type RuntimePaths struct {
-	StateRoot string
+	StateRoot     string
-	LogFile   string
+	LogFile       string
+	ProfileLogDir string
 }
 // NewEngine initializes the CEF runtime and returns a ready-to-use Engine.
 	eng := &Engine{
 		ctx:                    ctx,
+		profileLogDir:          paths.ProfileLogDir,
 		registerHandlers:       deps.RegisterHandlers,
 		registerAccentHandlers: deps.RegisterAccentHandlers,
 		currentConfigPayload:   deps.CurrentConfigPayload,
 	}
 	eng.messageRouter = messageRouter
 	eng.schemeHandler = schemeHandler
+	eng.startCEFHeartbeat()
 	registerEngineSchemeFactories(logger, purecef.NewSchemeHandlerFactory(schemeHandler))
 	return eng, nil

M internal/infrastructure/cef/env.go +12 -0


@@ -8,6 +8,10 @@ import (
8	8		const (
9	9		cefExternalBeginFrameEnvVar = "DUMBER_CEF_EXTERNAL_BEGIN_FRAME"
10	10		cefEnableWebAuthnUnsafeEnvVar = "DUMBER_CEF_ENABLE_WEBAUTHN_UNSAFE"
	11	+	cefChromiumFlagsEnvVar = "DUMBER_CEF_CHROMIUM_FLAGS"
	12	+	cefEnableVAAPIEnvVar = "DUMBER_CEF_ENABLE_VAAPI"
	13	+	cefRenderStallRecoveryEnvVar = "DUMBER_CEF_RENDER_STALL_RECOVERY"
	14	+	cefRenderStallBacktraceEnvVar = "DUMBER_CEF_RENDER_STALL_BACKTRACE"
11	15		)
12	16
13	17		// envBoolEnabled returns true when the given environment variable is set

@@ -28,3 +32,11 @@ func externalBeginFrameEnabled() bool {
28	32		func cefWebAuthnUnsafeEnabled() bool {
29	33		return envBoolEnabled(cefEnableWebAuthnUnsafeEnvVar)
30	34		}
	35	+
	36	+	func renderStallRecoveryEnabled() bool {
	37	+	return envBoolEnabled(cefRenderStallRecoveryEnvVar)
	38	+	}
	39	+
	40	+	func renderStallBacktraceEnabled() bool {
	41	+	return envBoolEnabled(cefRenderStallBacktraceEnvVar)
	42	+	}


@@ -8,6 +8,10 @@ import (
8	const (	8		const (
9	cefExternalBeginFrameEnvVar = "DUMBER_CEF_EXTERNAL_BEGIN_FRAME"	9		cefExternalBeginFrameEnvVar = "DUMBER_CEF_EXTERNAL_BEGIN_FRAME"
10	cefEnableWebAuthnUnsafeEnvVar = "DUMBER_CEF_ENABLE_WEBAUTHN_UNSAFE"	10		cefEnableWebAuthnUnsafeEnvVar = "DUMBER_CEF_ENABLE_WEBAUTHN_UNSAFE"
		11	+	cefChromiumFlagsEnvVar = "DUMBER_CEF_CHROMIUM_FLAGS"
		12	+	cefEnableVAAPIEnvVar = "DUMBER_CEF_ENABLE_VAAPI"
		13	+	cefRenderStallRecoveryEnvVar = "DUMBER_CEF_RENDER_STALL_RECOVERY"
		14	+	cefRenderStallBacktraceEnvVar = "DUMBER_CEF_RENDER_STALL_BACKTRACE"
11	)	15		)
12		16
13	// envBoolEnabled returns true when the given environment variable is set	17		// envBoolEnabled returns true when the given environment variable is set

@@ -28,3 +32,11 @@ func externalBeginFrameEnabled() bool {
28	func cefWebAuthnUnsafeEnabled() bool {	32		func cefWebAuthnUnsafeEnabled() bool {
29	return envBoolEnabled(cefEnableWebAuthnUnsafeEnvVar)	33		return envBoolEnabled(cefEnableWebAuthnUnsafeEnvVar)
30	}	34		}
		35	+
		36	+	func renderStallRecoveryEnabled() bool {
		37	+	return envBoolEnabled(cefRenderStallRecoveryEnvVar)
		38	+	}
		39	+
		40	+	func renderStallBacktraceEnabled() bool {
		41	+	return envBoolEnabled(cefRenderStallBacktraceEnvVar)
		42	+	}

M internal/infrastructure/cef/factory.go +6 -0


@@ -126,6 +126,12 @@ func (f WebViewFactory) newWebView(ctx context.Context) (WebView, error) {
126	126		// Build a CEF client backed by our handlerSet.
127	127		// Store on WebView to prevent GC collection before CEF AddRef's it.
128	128		wv.client = purecef.NewClient(wv.handlers)
	129	+	if opts := f.engine.cef2gtkProfileOptions(wv); opts.Enabled {
	130	+	if err := viewBridge.ConfigureProfiling(opts); err != nil {
	131	+	logging.FromContext(ctx).Warn().Err(err).Uint64("webview_id", uint64(id)).Msg("cef2gtk: failed to enable profiling")
	132	+	}
	133	+	}
	134	+	wv.startRenderStallWatchdog()
129	135		return wv, nil
130	136		}
131	137


@@ -126,6 +126,12 @@ func (f WebViewFactory) newWebView(ctx context.Context) (WebView, error) {
126	// Build a CEF client backed by our handlerSet.	126		// Build a CEF client backed by our handlerSet.
127	// Store on WebView to prevent GC collection before CEF AddRef's it.	127		// Store on WebView to prevent GC collection before CEF AddRef's it.
128	wv.client = purecef.NewClient(wv.handlers)	128		wv.client = purecef.NewClient(wv.handlers)
		129	+	if opts := f.engine.cef2gtkProfileOptions(wv); opts.Enabled {
		130	+	if err := viewBridge.ConfigureProfiling(opts); err != nil {
		131	+	logging.FromContext(ctx).Warn().Err(err).Uint64("webview_id", uint64(id)).Msg("cef2gtk: failed to enable profiling")
		132	+	}
		133	+	}
		134	+	wv.startRenderStallWatchdog()
129	return wv, nil	135		return wv, nil
130	}	136		}
131		137

A internal/infrastructure/cef/heartbeat.go +174 -0

@@ -0,0 +1,174 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"sync/atomic"
	5	+	"time"
	6	+
	7	+	purecef "github.com/bnema/purego-cef/cef"
	8	+
	9	+	"github.com/bnema/dumber/internal/logging"
	10	+	)
	11	+
	12	+	const (
	13	+	cefHeartbeatInterval = 1 * time.Second
	14	+	cefHeartbeatLogEvery = 10 * time.Second
	15	+	cefHeartbeatStopTimeout = 2 * time.Second
	16	+	)
	17	+
	18	+	type cefThreadHeartbeatState struct {
	19	+	seq atomic.Uint64
	20	+	lastPostUnixNS atomic.Int64
	21	+	lastAckUnixNS atomic.Int64
	22	+	lastLatencyNS atomic.Int64
	23	+	lastPostResult atomic.Int32
	24	+	lastLogUnixNS atomic.Int64
	25	+	inFlight atomic.Bool
	26	+	}
	27	+
	28	+	func (s *cefThreadHeartbeatState) snapshot(now time.Time) cefHeartbeatSnapshot {
	29	+	if s == nil {
	30	+	return cefHeartbeatSnapshot{}
	31	+	}
	32	+	lastPost := unixNSTime(s.lastPostUnixNS.Load())
	33	+	lastAck := unixNSTime(s.lastAckUnixNS.Load())
	34	+	snap := cefHeartbeatSnapshot{
	35	+	Seq: s.seq.Load(),
	36	+	PostResult: s.lastPostResult.Load(),
	37	+	Latency: time.Duration(s.lastLatencyNS.Load()),
	38	+	LastPostTime: lastPost,
	39	+	LastAckTime: lastAck,
	40	+	InFlight: s.inFlight.Load(),
	41	+	}
	42	+	if !lastPost.IsZero() {
	43	+	snap.LastPostAge = now.Sub(lastPost)
	44	+	}
	45	+	if !lastAck.IsZero() {
	46	+	snap.LastAckAge = now.Sub(lastAck)
	47	+	}
	48	+	return snap
	49	+	}
	50	+
	51	+	type cefHeartbeatSnapshot struct {
	52	+	Seq uint64
	53	+	PostResult int32
	54	+	Latency time.Duration
	55	+	LastPostTime time.Time
	56	+	LastAckTime time.Time
	57	+	LastPostAge time.Duration
	58	+	LastAckAge time.Duration
	59	+	InFlight bool
	60	+	}
	61	+
	62	+	func (e *Engine) startCEFHeartbeat() {
	63	+	if e == nil \|\| e.ctx == nil \|\| e.cefHeartbeatStop != nil {
	64	+	return
	65	+	}
	66	+	stop := make(chan struct{})
	67	+	done := make(chan struct{})
	68	+	e.cefHeartbeatStop = stop
	69	+	e.cefHeartbeatDone = done
	70	+	go e.cefHeartbeatLoop(stop, done)
	71	+	}
	72	+
	73	+	func (e *Engine) stopCEFHeartbeat() {
	74	+	if e == nil \|\| e.cefHeartbeatStop == nil {
	75	+	return
	76	+	}
	77	+	stop := e.cefHeartbeatStop
	78	+	done := e.cefHeartbeatDone
	79	+	e.cefHeartbeatStop = nil
	80	+	e.cefHeartbeatDone = nil
	81	+	close(stop)
	82	+	if done == nil {
	83	+	return
	84	+	}
	85	+	select {
	86	+	case <-done:
	87	+	case <-time.After(cefHeartbeatStopTimeout):
	88	+	if e.ctx != nil {
	89	+	logging.FromContext(e.ctx).Warn().Msg("cef: heartbeat stop timed out")
	90	+	}
	91	+	}
	92	+	}
	93	+
	94	+	func (e *Engine) cefHeartbeatLoop(stop <-chan struct{}, done chan<- struct{}) {
	95	+	defer close(done)
	96	+	ticker := time.NewTicker(cefHeartbeatInterval)
	97	+	defer ticker.Stop()
	98	+	for {
	99	+	select {
	100	+	case <-stop:
	101	+	return
	102	+	case now := <-ticker.C:
	103	+	e.postCEFThreadHeartbeat("ui", purecef.ThreadIDTidUi, &e.cefUIHeartbeat, now)
	104	+	e.postCEFThreadHeartbeat("io", purecef.ThreadIDTidIo, &e.cefIOHeartbeat, now)
	105	+	}
	106	+	}
	107	+	}
	108	+
	109	+	func (e Engine) postCEFThreadHeartbeat(name string, threadID purecef.ThreadID, state cefThreadHeartbeatState, now time.Time) {
	110	+	if e == nil \|\| state == nil {
	111	+	return
	112	+	}
	113	+	seq := state.seq.Add(1)
	114	+	postedAt := now
	115	+	state.lastPostUnixNS.Store(postedAt.UnixNano())
	116	+	state.inFlight.Store(true)
	117	+	task := cefNewTask(cefTaskFunc(func() {
	118	+	ackedAt := time.Now()
	119	+	state.lastAckUnixNS.Store(ackedAt.UnixNano())
	120	+	state.lastLatencyNS.Store(ackedAt.Sub(postedAt).Nanoseconds())
	121	+	state.inFlight.Store(false)
	122	+	}))
	123	+	if task == nil {
	124	+	state.lastPostResult.Store(0)
	125	+	state.inFlight.Store(false)
	126	+	return
	127	+	}
	128	+	result := cefPostTask(threadID, task)
	129	+	state.lastPostResult.Store(result)
	130	+	if result != 1 {
	131	+	state.inFlight.Store(false)
	132	+	}
	133	+	lastLog := unixNSTime(state.lastLogUnixNS.Load())
	134	+	if result != 1 \|\| lastLog.IsZero() \|\| now.Sub(lastLog) >= cefHeartbeatLogEvery {
	135	+	state.lastLogUnixNS.Store(now.UnixNano())
	136	+	snap := state.snapshot(now)
	137	+	logging.FromContext(e.ctx).Debug().
	138	+	Str("thread", name).
	139	+	Uint64("seq", seq).
	140	+	Int32("post_result", result).
	141	+	Int64("last_ack_age_ms", durationMillis(snap.LastAckAge)).
	142	+	Int64("latency_ms", durationMillis(snap.Latency)).
	143	+	Bool("in_flight", snap.InFlight).
	144	+	Msg("cef: thread heartbeat")
	145	+	}
	146	+	}
	147	+
	148	+	func (e *Engine) cefHeartbeatSnapshots(now time.Time) (cefHeartbeatSnapshot, cefHeartbeatSnapshot) {
	149	+	if e == nil {
	150	+	return cefHeartbeatSnapshot{}, cefHeartbeatSnapshot{}
	151	+	}
	152	+	return e.cefUIHeartbeat.snapshot(now), e.cefIOHeartbeat.snapshot(now)
	153	+	}
	154	+
	155	+	func (wv *WebView) cefHeartbeatSnapshots(now time.Time) (cefHeartbeatSnapshot, cefHeartbeatSnapshot) {
	156	+	if wv == nil \|\| wv.engine == nil {
	157	+	return cefHeartbeatSnapshot{}, cefHeartbeatSnapshot{}
	158	+	}
	159	+	return wv.engine.cefHeartbeatSnapshots(now)
	160	+	}
	161	+
	162	+	func unixNSTime(ns int64) time.Time {
	163	+	if ns <= 0 {
	164	+	return time.Time{}
	165	+	}
	166	+	return time.Unix(0, ns)
	167	+	}
	168	+
	169	+	func durationMillis(d time.Duration) int64 {
	170	+	if d <= 0 {
	171	+	return 0
	172	+	}
	173	+	return d.Milliseconds()
	174	+	}

@@ -0,0 +1,174 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"sync/atomic"
	5	+	"time"
	6	+
	7	+	purecef "github.com/bnema/purego-cef/cef"
	8	+
	9	+	"github.com/bnema/dumber/internal/logging"
	10	+	)
	11	+
	12	+	const (
	13	+	cefHeartbeatInterval = 1 * time.Second
	14	+	cefHeartbeatLogEvery = 10 * time.Second
	15	+	cefHeartbeatStopTimeout = 2 * time.Second
	16	+	)
	17	+
	18	+	type cefThreadHeartbeatState struct {
	19	+	seq atomic.Uint64
	20	+	lastPostUnixNS atomic.Int64
	21	+	lastAckUnixNS atomic.Int64
	22	+	lastLatencyNS atomic.Int64
	23	+	lastPostResult atomic.Int32
	24	+	lastLogUnixNS atomic.Int64
	25	+	inFlight atomic.Bool
	26	+	}
	27	+
	28	+	func (s *cefThreadHeartbeatState) snapshot(now time.Time) cefHeartbeatSnapshot {
	29	+	if s == nil {
	30	+	return cefHeartbeatSnapshot{}
	31	+	}
	32	+	lastPost := unixNSTime(s.lastPostUnixNS.Load())
	33	+	lastAck := unixNSTime(s.lastAckUnixNS.Load())
	34	+	snap := cefHeartbeatSnapshot{
	35	+	Seq: s.seq.Load(),
	36	+	PostResult: s.lastPostResult.Load(),
	37	+	Latency: time.Duration(s.lastLatencyNS.Load()),
	38	+	LastPostTime: lastPost,
	39	+	LastAckTime: lastAck,
	40	+	InFlight: s.inFlight.Load(),
	41	+	}
	42	+	if !lastPost.IsZero() {
	43	+	snap.LastPostAge = now.Sub(lastPost)
	44	+	}
	45	+	if !lastAck.IsZero() {
	46	+	snap.LastAckAge = now.Sub(lastAck)
	47	+	}
	48	+	return snap
	49	+	}
	50	+
	51	+	type cefHeartbeatSnapshot struct {
	52	+	Seq uint64
	53	+	PostResult int32
	54	+	Latency time.Duration
	55	+	LastPostTime time.Time
	56	+	LastAckTime time.Time
	57	+	LastPostAge time.Duration
	58	+	LastAckAge time.Duration
	59	+	InFlight bool
	60	+	}
	61	+
	62	+	func (e *Engine) startCEFHeartbeat() {
	63	+	if e == nil \|\| e.ctx == nil \|\| e.cefHeartbeatStop != nil {
	64	+	return
	65	+	}
	66	+	stop := make(chan struct{})
	67	+	done := make(chan struct{})
	68	+	e.cefHeartbeatStop = stop
	69	+	e.cefHeartbeatDone = done
	70	+	go e.cefHeartbeatLoop(stop, done)
	71	+	}
	72	+
	73	+	func (e *Engine) stopCEFHeartbeat() {
	74	+	if e == nil \|\| e.cefHeartbeatStop == nil {
	75	+	return
	76	+	}
	77	+	stop := e.cefHeartbeatStop
	78	+	done := e.cefHeartbeatDone
	79	+	e.cefHeartbeatStop = nil
	80	+	e.cefHeartbeatDone = nil
	81	+	close(stop)
	82	+	if done == nil {
	83	+	return
	84	+	}
	85	+	select {
	86	+	case <-done:
	87	+	case <-time.After(cefHeartbeatStopTimeout):
	88	+	if e.ctx != nil {
	89	+	logging.FromContext(e.ctx).Warn().Msg("cef: heartbeat stop timed out")
	90	+	}
	91	+	}
	92	+	}
	93	+
	94	+	func (e *Engine) cefHeartbeatLoop(stop <-chan struct{}, done chan<- struct{}) {
	95	+	defer close(done)
	96	+	ticker := time.NewTicker(cefHeartbeatInterval)
	97	+	defer ticker.Stop()
	98	+	for {
	99	+	select {
	100	+	case <-stop:
	101	+	return
	102	+	case now := <-ticker.C:
	103	+	e.postCEFThreadHeartbeat("ui", purecef.ThreadIDTidUi, &e.cefUIHeartbeat, now)
	104	+	e.postCEFThreadHeartbeat("io", purecef.ThreadIDTidIo, &e.cefIOHeartbeat, now)
	105	+	}
	106	+	}
	107	+	}
	108	+
	109	+	func (e Engine) postCEFThreadHeartbeat(name string, threadID purecef.ThreadID, state cefThreadHeartbeatState, now time.Time) {
	110	+	if e == nil \|\| state == nil {
	111	+	return
	112	+	}
	113	+	seq := state.seq.Add(1)
	114	+	postedAt := now
	115	+	state.lastPostUnixNS.Store(postedAt.UnixNano())
	116	+	state.inFlight.Store(true)
	117	+	task := cefNewTask(cefTaskFunc(func() {
	118	+	ackedAt := time.Now()
	119	+	state.lastAckUnixNS.Store(ackedAt.UnixNano())
	120	+	state.lastLatencyNS.Store(ackedAt.Sub(postedAt).Nanoseconds())
	121	+	state.inFlight.Store(false)
	122	+	}))
	123	+	if task == nil {
	124	+	state.lastPostResult.Store(0)
	125	+	state.inFlight.Store(false)
	126	+	return
	127	+	}
	128	+	result := cefPostTask(threadID, task)
	129	+	state.lastPostResult.Store(result)
	130	+	if result != 1 {
	131	+	state.inFlight.Store(false)
	132	+	}
	133	+	lastLog := unixNSTime(state.lastLogUnixNS.Load())
	134	+	if result != 1 \|\| lastLog.IsZero() \|\| now.Sub(lastLog) >= cefHeartbeatLogEvery {
	135	+	state.lastLogUnixNS.Store(now.UnixNano())
	136	+	snap := state.snapshot(now)
	137	+	logging.FromContext(e.ctx).Debug().
	138	+	Str("thread", name).
	139	+	Uint64("seq", seq).
	140	+	Int32("post_result", result).
	141	+	Int64("last_ack_age_ms", durationMillis(snap.LastAckAge)).
	142	+	Int64("latency_ms", durationMillis(snap.Latency)).
	143	+	Bool("in_flight", snap.InFlight).
	144	+	Msg("cef: thread heartbeat")
	145	+	}
	146	+	}
	147	+
	148	+	func (e *Engine) cefHeartbeatSnapshots(now time.Time) (cefHeartbeatSnapshot, cefHeartbeatSnapshot) {
	149	+	if e == nil {
	150	+	return cefHeartbeatSnapshot{}, cefHeartbeatSnapshot{}
	151	+	}
	152	+	return e.cefUIHeartbeat.snapshot(now), e.cefIOHeartbeat.snapshot(now)
	153	+	}
	154	+
	155	+	func (wv *WebView) cefHeartbeatSnapshots(now time.Time) (cefHeartbeatSnapshot, cefHeartbeatSnapshot) {
	156	+	if wv == nil \|\| wv.engine == nil {
	157	+	return cefHeartbeatSnapshot{}, cefHeartbeatSnapshot{}
	158	+	}
	159	+	return wv.engine.cefHeartbeatSnapshots(now)
	160	+	}
	161	+
	162	+	func unixNSTime(ns int64) time.Time {
	163	+	if ns <= 0 {
	164	+	return time.Time{}
	165	+	}
	166	+	return time.Unix(0, ns)
	167	+	}
	168	+
	169	+	func durationMillis(d time.Duration) int64 {
	170	+	if d <= 0 {
	171	+	return 0
	172	+	}
	173	+	return d.Milliseconds()
	174	+	}

A internal/infrastructure/cef/process_diagnostics.go +307 -0

@@ -0,0 +1,307 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"bytes"
	5	+	"context"
	6	+	"fmt"
	7	+	"os"
	8	+	"os/exec"
	9	+	"path/filepath"
	10	+	"sort"
	11	+	"strconv"
	12	+	"strings"
	13	+	"sync/atomic"
	14	+	"time"
	15	+
	16	+	"github.com/bnema/dumber/internal/logging"
	17	+	)
	18	+
	19	+	const (
	20	+	maxLoggedThreadsPerProcess = 8
	21	+	maxDetailedThreadsPerProcess = 48
	22	+	renderStallBacktraceCooldown = 30 * time.Second
	23	+	renderStallBacktraceCommandLimit = 64 * 1024
	24	+	)
	25	+
	26	+	var renderStallBacktraceLastUnixNS atomic.Int64
	27	+
	28	+	func (wv *WebView) logCEFProcessDiagnostics(reason string, classification renderStallClassification) {
	29	+	if wv == nil \|\| wv.ctx == nil {
	30	+	return
	31	+	}
	32	+	pids := append([]int{os.Getpid()}, childPIDs(os.Getpid())...)
	33	+	for _, pid := range pids {
	34	+	cmdline := procCmdline(pid)
	35	+	processType := chromiumProcessType(cmdline)
	36	+	threads := procThreadSummaries(pid, maxLoggedThreadsPerProcess)
	37	+	detailedThreads := []string(nil)
	38	+	if classification.CEFUIBlocked && processType == "browser" {
	39	+	detailedThreads = procDetailedThreadSummaries(pid, maxDetailedThreadsPerProcess)
	40	+	}
	41	+	logging.FromContext(wv.ctx).Warn().
	42	+	Str("reason", reason).
	43	+	Str("classification", classification.Category).
	44	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	45	+	Bool("cef_io_alive", classification.CEFIOAlive).
	46	+	Int("pid", pid).
	47	+	Str("process_type", processType).
	48	+	Str("cmdline", logging.TruncateURL(cmdline, 1024)).
	49	+	Int("thread_count", procThreadCount(pid)).
	50	+	Strs("hot_threads", threads).
	51	+	Strs("detailed_threads", detailedThreads).
	52	+	Strs("gpu_fdinfo", gpuFDInfoSummaries(pid)).
	53	+	Msg("cef: process diagnostic snapshot")
	54	+	}
	55	+	if classification.CEFUIBlocked {
	56	+	wv.maybeCaptureRenderStallBacktrace(reason, classification)
	57	+	}
	58	+	}
	59	+
	60	+	func childPIDs(parent int) []int {
	61	+	if out := childPIDsFromProcChildren(parent); len(out) > 0 {
	62	+	return out
	63	+	}
	64	+	entries, err := os.ReadDir("/proc")
	65	+	if err != nil {
	66	+	return nil
	67	+	}
	68	+	var out []int
	69	+	for _, entry := range entries {
	70	+	if !entry.IsDir() {
	71	+	continue
	72	+	}
	73	+	pid, err := strconv.Atoi(entry.Name())
	74	+	if err != nil {
	75	+	continue
	76	+	}
	77	+	if procPPID(pid) == parent {
	78	+	out = append(out, pid)
	79	+	}
	80	+	}
	81	+	sort.Ints(out)
	82	+	return out
	83	+	}
	84	+
	85	+	func childPIDsFromProcChildren(parent int) []int {
	86	+	path := filepath.Join("/proc", strconv.Itoa(parent), "task", strconv.Itoa(parent), "children")
	87	+	b, err := os.ReadFile(path)
	88	+	if err != nil {
	89	+	return nil
	90	+	}
	91	+	fields := strings.Fields(string(b))
	92	+	out := make([]int, 0, len(fields))
	93	+	for _, field := range fields {
	94	+	pid, err := strconv.Atoi(field)
	95	+	if err != nil {
	96	+	continue
	97	+	}
	98	+	out = append(out, pid)
	99	+	}
	100	+	sort.Ints(out)
	101	+	return out
	102	+	}
	103	+
	104	+	func procPPID(pid int) int {
	105	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "status"))
	106	+	if err != nil {
	107	+	return 0
	108	+	}
	109	+	for _, line := range strings.Split(string(b), "\n") {
	110	+	if !strings.HasPrefix(line, "PPid:") {
	111	+	continue
	112	+	}
	113	+	fields := strings.Fields(line)
	114	+	if len(fields) >= 2 {
	115	+	ppid, _ := strconv.Atoi(fields[1])
	116	+	return ppid
	117	+	}
	118	+	}
	119	+	return 0
	120	+	}
	121	+
	122	+	func procCmdline(pid int) string {
	123	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "cmdline"))
	124	+	if err != nil {
	125	+	return ""
	126	+	}
	127	+	return strings.TrimSpace(string(bytes.ReplaceAll(b, []byte{0}, []byte{' '})))
	128	+	}
	129	+
	130	+	func chromiumProcessType(cmdline string) string {
	131	+	for _, field := range strings.Fields(cmdline) {
	132	+	if strings.HasPrefix(field, "--type=") {
	133	+	return strings.TrimPrefix(field, "--type=")
	134	+	}
	135	+	}
	136	+	return "browser"
	137	+	}
	138	+
	139	+	func procThreadCount(pid int) int {
	140	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "task"))
	141	+	if err != nil {
	142	+	return 0
	143	+	}
	144	+	return len(entries)
	145	+	}
	146	+
	147	+	type procThreadSummary struct {
	148	+	text string
	149	+	ticks uint64
	150	+	}
	151	+
	152	+	func procThreadSummaries(pid, limit int) []string {
	153	+	return procThreadSummariesWithDetails(pid, limit, false)
	154	+	}
	155	+
	156	+	func procDetailedThreadSummaries(pid, limit int) []string {
	157	+	return procThreadSummariesWithDetails(pid, limit, true)
	158	+	}
	159	+
	160	+	func procThreadSummariesWithDetails(pid, limit int, detailed bool) []string {
	161	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "task"))
	162	+	if err != nil {
	163	+	return nil
	164	+	}
	165	+	items := make([]procThreadSummary, 0, len(entries))
	166	+	for _, entry := range entries {
	167	+	tid, err := strconv.Atoi(entry.Name())
	168	+	if err != nil {
	169	+	continue
	170	+	}
	171	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "stat"))
	172	+	if err != nil {
	173	+	continue
	174	+	}
	175	+	text, ticks := parseThreadStat(tid, string(b))
	176	+	if detailed {
	177	+	text = text + " wchan=" + procThreadWchan(pid, tid)
	178	+	if stack := procThreadKernelStack(pid, tid); stack != "" {
	179	+	text = text + " kernel_stack=" + stack
	180	+	}
	181	+	}
	182	+	items = append(items, procThreadSummary{text: text, ticks: ticks})
	183	+	}
	184	+	sort.Slice(items, func(i, j int) bool { return items[i].ticks > items[j].ticks })
	185	+	if limit > 0 && len(items) > limit {
	186	+	items = items[:limit]
	187	+	}
	188	+	out := make([]string, 0, len(items))
	189	+	for _, item := range items {
	190	+	out = append(out, item.text)
	191	+	}
	192	+	return out
	193	+	}
	194	+
	195	+	func parseThreadStat(tid int, stat string) (string, uint64) {
	196	+	open := strings.IndexByte(stat, '(')
	197	+	close := strings.LastIndexByte(stat, ')')
	198	+	if open < 0 \|\| close <= open \|\| close+2 >= len(stat) {
	199	+	return strconv.Itoa(tid), 0
	200	+	}
	201	+	comm := stat[open+1 : close]
	202	+	rest := strings.Fields(stat[close+2:])
	203	+	state := "?"
	204	+	if len(rest) > 0 {
	205	+	state = rest[0]
	206	+	}
	207	+	var ticks uint64
	208	+	if len(rest) > 12 {
	209	+	utime, _ := strconv.ParseUint(rest[11], 10, 64)
	210	+	stime, _ := strconv.ParseUint(rest[12], 10, 64)
	211	+	ticks = utime + stime
	212	+	}
	213	+	return "tid=" + strconv.Itoa(tid) + " state=" + state + " ticks=" + strconv.FormatUint(ticks, 10) + " comm=" + comm, ticks
	214	+	}
	215	+
	216	+	func procThreadWchan(pid, tid int) string {
	217	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "wchan"))
	218	+	if err != nil {
	219	+	return ""
	220	+	}
	221	+	return strings.TrimSpace(string(b))
	222	+	}
	223	+
	224	+	func procThreadKernelStack(pid, tid int) string {
	225	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "stack"))
	226	+	if err != nil {
	227	+	return ""
	228	+	}
	229	+	lines := strings.Split(strings.TrimSpace(string(b)), "\n")
	230	+	if len(lines) > 6 {
	231	+	lines = lines[:6]
	232	+	}
	233	+	return strings.Join(lines, " \| ")
	234	+	}
	235	+
	236	+	func (wv *WebView) maybeCaptureRenderStallBacktrace(reason string, classification renderStallClassification) {
	237	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallBacktraceEnabled() {
	238	+	return
	239	+	}
	240	+	now := time.Now()
	241	+	last := unixNSTime(renderStallBacktraceLastUnixNS.Load())
	242	+	if !last.IsZero() && now.Sub(last) < renderStallBacktraceCooldown {
	243	+	return
	244	+	}
	245	+	renderStallBacktraceLastUnixNS.Store(now.UnixNano())
	246	+	pid := os.Getpid()
	247	+	if _, err := exec.LookPath("gdb"); err != nil {
	248	+	logging.FromContext(wv.ctx).Warn().
	249	+	Err(err).
	250	+	Str("reason", reason).
	251	+	Str("classification", classification.Category).
	252	+	Int("pid", pid).
	253	+	Str("external_command", fmt.Sprintf("gdb -p %d -batch -ex 'thread apply all bt'", pid)).
	254	+	Msg("cef: render stall native backtrace skipped; gdb not available")
	255	+	return
	256	+	}
	257	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallBacktraceEnabled() {
	258	+	return
	259	+	}
	260	+	logCtx := wv.ctx
	261	+	go func() {
	262	+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	263	+	defer cancel()
	264	+	cmd := exec.CommandContext(ctx, "gdb", "-p", strconv.Itoa(pid), "-batch", "-ex", "thread apply all bt")
	265	+	out, err := cmd.CombinedOutput()
	266	+	truncated := false
	267	+	if len(out) > renderStallBacktraceCommandLimit {
	268	+	out = out[:renderStallBacktraceCommandLimit]
	269	+	truncated = true
	270	+	}
	271	+	log := logging.FromContext(logCtx).Warn().
	272	+	Str("reason", reason).
	273	+	Str("classification", classification.Category).
	274	+	Int("pid", pid).
	275	+	Bool("truncated", truncated).
	276	+	Str("backtrace", string(out))
	277	+	if ctx.Err() != nil {
	278	+	log = log.Err(ctx.Err())
	279	+	} else if err != nil {
	280	+	log = log.Err(err)
	281	+	}
	282	+	log.Msg("cef: render stall native backtrace")
	283	+	}()
	284	+	}
	285	+
	286	+	func gpuFDInfoSummaries(pid int) []string {
	287	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "fdinfo"))
	288	+	if err != nil {
	289	+	return nil
	290	+	}
	291	+	var out []string
	292	+	for _, entry := range entries {
	293	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "fdinfo", entry.Name()))
	294	+	if err != nil {
	295	+	continue
	296	+	}
	297	+	for _, line := range strings.Split(string(b), "\n") {
	298	+	if strings.Contains(line, "drm-engine-") \|\| strings.HasPrefix(line, "drm-client-id") \|\| strings.HasPrefix(line, "drm-pdev") {
	299	+	out = append(out, "fd="+entry.Name()+" "+strings.TrimSpace(line))
	300	+	}
	301	+	}
	302	+	}
	303	+	if len(out) > 32 {
	304	+	out = out[:32]
	305	+	}
	306	+	return out
	307	+	}

@@ -0,0 +1,307 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"bytes"
	5	+	"context"
	6	+	"fmt"
	7	+	"os"
	8	+	"os/exec"
	9	+	"path/filepath"
	10	+	"sort"
	11	+	"strconv"
	12	+	"strings"
	13	+	"sync/atomic"
	14	+	"time"
	15	+
	16	+	"github.com/bnema/dumber/internal/logging"
	17	+	)
	18	+
	19	+	const (
	20	+	maxLoggedThreadsPerProcess = 8
	21	+	maxDetailedThreadsPerProcess = 48
	22	+	renderStallBacktraceCooldown = 30 * time.Second
	23	+	renderStallBacktraceCommandLimit = 64 * 1024
	24	+	)
	25	+
	26	+	var renderStallBacktraceLastUnixNS atomic.Int64
	27	+
	28	+	func (wv *WebView) logCEFProcessDiagnostics(reason string, classification renderStallClassification) {
	29	+	if wv == nil \|\| wv.ctx == nil {
	30	+	return
	31	+	}
	32	+	pids := append([]int{os.Getpid()}, childPIDs(os.Getpid())...)
	33	+	for _, pid := range pids {
	34	+	cmdline := procCmdline(pid)
	35	+	processType := chromiumProcessType(cmdline)
	36	+	threads := procThreadSummaries(pid, maxLoggedThreadsPerProcess)
	37	+	detailedThreads := []string(nil)
	38	+	if classification.CEFUIBlocked && processType == "browser" {
	39	+	detailedThreads = procDetailedThreadSummaries(pid, maxDetailedThreadsPerProcess)
	40	+	}
	41	+	logging.FromContext(wv.ctx).Warn().
	42	+	Str("reason", reason).
	43	+	Str("classification", classification.Category).
	44	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	45	+	Bool("cef_io_alive", classification.CEFIOAlive).
	46	+	Int("pid", pid).
	47	+	Str("process_type", processType).
	48	+	Str("cmdline", logging.TruncateURL(cmdline, 1024)).
	49	+	Int("thread_count", procThreadCount(pid)).
	50	+	Strs("hot_threads", threads).
	51	+	Strs("detailed_threads", detailedThreads).
	52	+	Strs("gpu_fdinfo", gpuFDInfoSummaries(pid)).
	53	+	Msg("cef: process diagnostic snapshot")
	54	+	}
	55	+	if classification.CEFUIBlocked {
	56	+	wv.maybeCaptureRenderStallBacktrace(reason, classification)
	57	+	}
	58	+	}
	59	+
	60	+	func childPIDs(parent int) []int {
	61	+	if out := childPIDsFromProcChildren(parent); len(out) > 0 {
	62	+	return out
	63	+	}
	64	+	entries, err := os.ReadDir("/proc")
	65	+	if err != nil {
	66	+	return nil
	67	+	}
	68	+	var out []int
	69	+	for _, entry := range entries {
	70	+	if !entry.IsDir() {
	71	+	continue
	72	+	}
	73	+	pid, err := strconv.Atoi(entry.Name())
	74	+	if err != nil {
	75	+	continue
	76	+	}
	77	+	if procPPID(pid) == parent {
	78	+	out = append(out, pid)
	79	+	}
	80	+	}
	81	+	sort.Ints(out)
	82	+	return out
	83	+	}
	84	+
	85	+	func childPIDsFromProcChildren(parent int) []int {
	86	+	path := filepath.Join("/proc", strconv.Itoa(parent), "task", strconv.Itoa(parent), "children")
	87	+	b, err := os.ReadFile(path)
	88	+	if err != nil {
	89	+	return nil
	90	+	}
	91	+	fields := strings.Fields(string(b))
	92	+	out := make([]int, 0, len(fields))
	93	+	for _, field := range fields {
	94	+	pid, err := strconv.Atoi(field)
	95	+	if err != nil {
	96	+	continue
	97	+	}
	98	+	out = append(out, pid)
	99	+	}
	100	+	sort.Ints(out)
	101	+	return out
	102	+	}
	103	+
	104	+	func procPPID(pid int) int {
	105	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "status"))
	106	+	if err != nil {
	107	+	return 0
	108	+	}
	109	+	for _, line := range strings.Split(string(b), "\n") {
	110	+	if !strings.HasPrefix(line, "PPid:") {
	111	+	continue
	112	+	}
	113	+	fields := strings.Fields(line)
	114	+	if len(fields) >= 2 {
	115	+	ppid, _ := strconv.Atoi(fields[1])
	116	+	return ppid
	117	+	}
	118	+	}
	119	+	return 0
	120	+	}
	121	+
	122	+	func procCmdline(pid int) string {
	123	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "cmdline"))
	124	+	if err != nil {
	125	+	return ""
	126	+	}
	127	+	return strings.TrimSpace(string(bytes.ReplaceAll(b, []byte{0}, []byte{' '})))
	128	+	}
	129	+
	130	+	func chromiumProcessType(cmdline string) string {
	131	+	for _, field := range strings.Fields(cmdline) {
	132	+	if strings.HasPrefix(field, "--type=") {
	133	+	return strings.TrimPrefix(field, "--type=")
	134	+	}
	135	+	}
	136	+	return "browser"
	137	+	}
	138	+
	139	+	func procThreadCount(pid int) int {
	140	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "task"))
	141	+	if err != nil {
	142	+	return 0
	143	+	}
	144	+	return len(entries)
	145	+	}
	146	+
	147	+	type procThreadSummary struct {
	148	+	text string
	149	+	ticks uint64
	150	+	}
	151	+
	152	+	func procThreadSummaries(pid, limit int) []string {
	153	+	return procThreadSummariesWithDetails(pid, limit, false)
	154	+	}
	155	+
	156	+	func procDetailedThreadSummaries(pid, limit int) []string {
	157	+	return procThreadSummariesWithDetails(pid, limit, true)
	158	+	}
	159	+
	160	+	func procThreadSummariesWithDetails(pid, limit int, detailed bool) []string {
	161	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "task"))
	162	+	if err != nil {
	163	+	return nil
	164	+	}
	165	+	items := make([]procThreadSummary, 0, len(entries))
	166	+	for _, entry := range entries {
	167	+	tid, err := strconv.Atoi(entry.Name())
	168	+	if err != nil {
	169	+	continue
	170	+	}
	171	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "stat"))
	172	+	if err != nil {
	173	+	continue
	174	+	}
	175	+	text, ticks := parseThreadStat(tid, string(b))
	176	+	if detailed {
	177	+	text = text + " wchan=" + procThreadWchan(pid, tid)
	178	+	if stack := procThreadKernelStack(pid, tid); stack != "" {
	179	+	text = text + " kernel_stack=" + stack
	180	+	}
	181	+	}
	182	+	items = append(items, procThreadSummary{text: text, ticks: ticks})
	183	+	}
	184	+	sort.Slice(items, func(i, j int) bool { return items[i].ticks > items[j].ticks })
	185	+	if limit > 0 && len(items) > limit {
	186	+	items = items[:limit]
	187	+	}
	188	+	out := make([]string, 0, len(items))
	189	+	for _, item := range items {
	190	+	out = append(out, item.text)
	191	+	}
	192	+	return out
	193	+	}
	194	+
	195	+	func parseThreadStat(tid int, stat string) (string, uint64) {
	196	+	open := strings.IndexByte(stat, '(')
	197	+	close := strings.LastIndexByte(stat, ')')
	198	+	if open < 0 \|\| close <= open \|\| close+2 >= len(stat) {
	199	+	return strconv.Itoa(tid), 0
	200	+	}
	201	+	comm := stat[open+1 : close]
	202	+	rest := strings.Fields(stat[close+2:])
	203	+	state := "?"
	204	+	if len(rest) > 0 {
	205	+	state = rest[0]
	206	+	}
	207	+	var ticks uint64
	208	+	if len(rest) > 12 {
	209	+	utime, _ := strconv.ParseUint(rest[11], 10, 64)
	210	+	stime, _ := strconv.ParseUint(rest[12], 10, 64)
	211	+	ticks = utime + stime
	212	+	}
	213	+	return "tid=" + strconv.Itoa(tid) + " state=" + state + " ticks=" + strconv.FormatUint(ticks, 10) + " comm=" + comm, ticks
	214	+	}
	215	+
	216	+	func procThreadWchan(pid, tid int) string {
	217	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "wchan"))
	218	+	if err != nil {
	219	+	return ""
	220	+	}
	221	+	return strings.TrimSpace(string(b))
	222	+	}
	223	+
	224	+	func procThreadKernelStack(pid, tid int) string {
	225	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "task", strconv.Itoa(tid), "stack"))
	226	+	if err != nil {
	227	+	return ""
	228	+	}
	229	+	lines := strings.Split(strings.TrimSpace(string(b)), "\n")
	230	+	if len(lines) > 6 {
	231	+	lines = lines[:6]
	232	+	}
	233	+	return strings.Join(lines, " \| ")
	234	+	}
	235	+
	236	+	func (wv *WebView) maybeCaptureRenderStallBacktrace(reason string, classification renderStallClassification) {
	237	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallBacktraceEnabled() {
	238	+	return
	239	+	}
	240	+	now := time.Now()
	241	+	last := unixNSTime(renderStallBacktraceLastUnixNS.Load())
	242	+	if !last.IsZero() && now.Sub(last) < renderStallBacktraceCooldown {
	243	+	return
	244	+	}
	245	+	renderStallBacktraceLastUnixNS.Store(now.UnixNano())
	246	+	pid := os.Getpid()
	247	+	if _, err := exec.LookPath("gdb"); err != nil {
	248	+	logging.FromContext(wv.ctx).Warn().
	249	+	Err(err).
	250	+	Str("reason", reason).
	251	+	Str("classification", classification.Category).
	252	+	Int("pid", pid).
	253	+	Str("external_command", fmt.Sprintf("gdb -p %d -batch -ex 'thread apply all bt'", pid)).
	254	+	Msg("cef: render stall native backtrace skipped; gdb not available")
	255	+	return
	256	+	}
	257	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallBacktraceEnabled() {
	258	+	return
	259	+	}
	260	+	logCtx := wv.ctx
	261	+	go func() {
	262	+	ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
	263	+	defer cancel()
	264	+	cmd := exec.CommandContext(ctx, "gdb", "-p", strconv.Itoa(pid), "-batch", "-ex", "thread apply all bt")
	265	+	out, err := cmd.CombinedOutput()
	266	+	truncated := false
	267	+	if len(out) > renderStallBacktraceCommandLimit {
	268	+	out = out[:renderStallBacktraceCommandLimit]
	269	+	truncated = true
	270	+	}
	271	+	log := logging.FromContext(logCtx).Warn().
	272	+	Str("reason", reason).
	273	+	Str("classification", classification.Category).
	274	+	Int("pid", pid).
	275	+	Bool("truncated", truncated).
	276	+	Str("backtrace", string(out))
	277	+	if ctx.Err() != nil {
	278	+	log = log.Err(ctx.Err())
	279	+	} else if err != nil {
	280	+	log = log.Err(err)
	281	+	}
	282	+	log.Msg("cef: render stall native backtrace")
	283	+	}()
	284	+	}
	285	+
	286	+	func gpuFDInfoSummaries(pid int) []string {
	287	+	entries, err := os.ReadDir(filepath.Join("/proc", strconv.Itoa(pid), "fdinfo"))
	288	+	if err != nil {
	289	+	return nil
	290	+	}
	291	+	var out []string
	292	+	for _, entry := range entries {
	293	+	b, err := os.ReadFile(filepath.Join("/proc", strconv.Itoa(pid), "fdinfo", entry.Name()))
	294	+	if err != nil {
	295	+	continue
	296	+	}
	297	+	for _, line := range strings.Split(string(b), "\n") {
	298	+	if strings.Contains(line, "drm-engine-") \|\| strings.HasPrefix(line, "drm-client-id") \|\| strings.HasPrefix(line, "drm-pdev") {
	299	+	out = append(out, "fd="+entry.Name()+" "+strings.TrimSpace(line))
	300	+	}
	301	+	}
	302	+	}
	303	+	if len(out) > 32 {
	304	+	out = out[:32]
	305	+	}
	306	+	return out
	307	+	}

A internal/infrastructure/cef/profile.go +172 -0

@@ -0,0 +1,172 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"encoding/json"
	5	+	"errors"
	6	+	"fmt"
	7	+	"os"
	8	+	"path/filepath"
	9	+	"strconv"
	10	+	"strings"
	11	+	"sync"
	12	+	"time"
	13	+
	14	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	15	+
	16	+	"github.com/bnema/dumber/internal/logging"
	17	+	)
	18	+
	19	+	const (
	20	+	cef2gtkProfileEnv = "DUMBER_CEF2GTK_PROFILE"
	21	+	cef2gtkProfileIntervalEnv = "DUMBER_CEF2GTK_PROFILE_INTERVAL"
	22	+	cef2gtkProfileOutputEnv = "DUMBER_CEF2GTK_PROFILE_OUTPUT"
	23	+	)
	24	+
	25	+	var errProfileWriterClosed = errors.New("cef2gtk profile writer is closed")
	26	+
	27	+	type lockedProfileWriter struct {
	28	+	mu sync.Mutex
	29	+	file *os.File
	30	+	}
	31	+
	32	+	func (w *lockedProfileWriter) Write(p []byte) (int, error) {
	33	+	if w == nil {
	34	+	return 0, errProfileWriterClosed
	35	+	}
	36	+	w.mu.Lock()
	37	+	defer w.mu.Unlock()
	38	+	if w.file == nil {
	39	+	return 0, errProfileWriterClosed
	40	+	}
	41	+	return w.file.Write(p)
	42	+	}
	43	+
	44	+	func (w *lockedProfileWriter) Close() error {
	45	+	if w == nil \|\| w.file == nil {
	46	+	return nil
	47	+	}
	48	+	w.mu.Lock()
	49	+	defer w.mu.Unlock()
	50	+	err := w.file.Close()
	51	+	w.file = nil
	52	+	return err
	53	+	}
	54	+
	55	+	func cef2gtkProfileEnabled() bool {
	56	+	v := strings.TrimSpace(strings.ToLower(os.Getenv(cef2gtkProfileEnv)))
	57	+	if v == "" {
	58	+	return false
	59	+	}
	60	+	if b, err := strconv.ParseBool(v); err == nil {
	61	+	return b
	62	+	}
	63	+	switch v {
	64	+	case "1", "yes", "on", "enabled":
	65	+	return true
	66	+	default:
	67	+	return false
	68	+	}
	69	+	}
	70	+
	71	+	func cef2gtkProfileInterval() time.Duration {
	72	+	v := strings.TrimSpace(os.Getenv(cef2gtkProfileIntervalEnv))
	73	+	if v == "" {
	74	+	return time.Second
	75	+	}
	76	+	d, err := time.ParseDuration(v)
	77	+	if err != nil \|\| d <= 0 {
	78	+	return time.Second
	79	+	}
	80	+	return d
	81	+	}
	82	+
	83	+	type cef2gtkProfileRecord struct {
	84	+	WebViewID uint64 `json:"webview_id"`
	85	+	Snapshot cef2gtk.ProfileSnapshot `json:"snapshot"`
	86	+	}
	87	+
	88	+	func (e Engine) cef2gtkProfileOptions(wv WebView) cef2gtk.ProfileOptions {
	89	+	if e == nil \|\| wv == nil \|\| !cef2gtkProfileEnabled() {
	90	+	return cef2gtk.ProfileOptions{}
	91	+	}
	92	+	path := e.cef2gtkProfilePath()
	93	+	if path == "" {
	94	+	return cef2gtk.ProfileOptions{}
	95	+	}
	96	+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
	97	+	logging.FromContext(e.ctx).Warn().Err(err).Str("path", path).Msg("cef2gtk: failed to create profile log directory")
	98	+	return cef2gtk.ProfileOptions{}
	99	+	}
	100	+	file, err := os.OpenFile(path, os.O_CREATE\|os.O_APPEND\|os.O_WRONLY, 0o644)
	101	+	if err != nil {
	102	+	logging.FromContext(e.ctx).Warn().Err(err).Str("path", path).Msg("cef2gtk: failed to open profile log")
	103	+	return cef2gtk.ProfileOptions{}
	104	+	}
	105	+	writer := &lockedProfileWriter{file: file}
	106	+	wv.profileCleanup = func() { _ = writer.Close() }
	107	+	logging.FromContext(e.ctx).Info().Str("profile_log", path).Uint64("webview_id", uint64(wv.id)).Msg("cef2gtk profiling enabled")
	108	+	return cef2gtk.ProfileOptions{
	109	+	Enabled: true,
	110	+	Interval: cef2gtkProfileInterval(),
	111	+	OnSnapshot: func(s cef2gtk.ProfileSnapshot) {
	112	+	wv.recordCEF2GTKProfileSnapshot(s)
	113	+	record := cef2gtkProfileRecord{WebViewID: uint64(wv.id), Snapshot: s}
	114	+	if b, err := json.Marshal(record); err == nil {
	115	+	_, _ = writer.Write(append(b, '\n'))
	116	+	}
	117	+	logging.FromContext(e.ctx).Debug().
	118	+	Uint64("webview_id", uint64(wv.id)).
	119	+	Uint64("frames_received", s.FramesReceived).
	120	+	Uint64("frames_rendered", s.FramesRendered).
	121	+	Uint32("gc_delta", s.GC.NumGCDelta).
	122	+	Msg("cef2gtk profile snapshot")
	123	+	},
	124	+	}
	125	+	}
	126	+
	127	+	func (wv *WebView) recordCEF2GTKProfileSnapshot(snapshot cef2gtk.ProfileSnapshot) {
	128	+	if wv == nil {
	129	+	return
	130	+	}
	131	+	wv.profileMu.Lock()
	132	+	wv.previousProfileSnapshot = wv.latestProfileSnapshot
	133	+	wv.latestProfileSnapshot = snapshot
	134	+	wv.latestProfileSnapshotAt = snapshot.Time
	135	+	wv.profileMu.Unlock()
	136	+	}
	137	+
	138	+	func (wv *WebView) latestCEF2GTKProfileSnapshot(now time.Time) (cef2gtk.ProfileSnapshot, time.Duration, bool) {
	139	+	if wv == nil {
	140	+	return cef2gtk.ProfileSnapshot{}, 0, false
	141	+	}
	142	+	wv.profileMu.Lock()
	143	+	snapshot := wv.latestProfileSnapshot
	144	+	snapshotAt := wv.latestProfileSnapshotAt
	145	+	wv.profileMu.Unlock()
	146	+	if snapshotAt.IsZero() {
	147	+	return cef2gtk.ProfileSnapshot{}, 0, false
	148	+	}
	149	+	age := now.Sub(snapshotAt)
	150	+	if age < 0 {
	151	+	age = 0
	152	+	}
	153	+	return snapshot, age, true
	154	+	}
	155	+
	156	+	func (e *Engine) cef2gtkProfilePath() string {
	157	+	if explicit := strings.TrimSpace(os.Getenv(cef2gtkProfileOutputEnv)); explicit != "" {
	158	+	return explicit
	159	+	}
	160	+	metadata, ok := logging.SessionMetadataFromContext(e.ctx)
	161	+	if !ok \|\| metadata.ID == "" {
	162	+	return ""
	163	+	}
	164	+	logDir := e.profileLogDir
	165	+	if metadata.LogPath != "" {
	166	+	logDir = filepath.Dir(metadata.LogPath)
	167	+	}
	168	+	if logDir == "" {
	169	+	return ""
	170	+	}
	171	+	return filepath.Join(logDir, fmt.Sprintf("session_%s_cef2gtk_profile.jsonl", metadata.ID))
	172	+	}

@@ -0,0 +1,172 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"encoding/json"
	5	+	"errors"
	6	+	"fmt"
	7	+	"os"
	8	+	"path/filepath"
	9	+	"strconv"
	10	+	"strings"
	11	+	"sync"
	12	+	"time"
	13	+
	14	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	15	+
	16	+	"github.com/bnema/dumber/internal/logging"
	17	+	)
	18	+
	19	+	const (
	20	+	cef2gtkProfileEnv = "DUMBER_CEF2GTK_PROFILE"
	21	+	cef2gtkProfileIntervalEnv = "DUMBER_CEF2GTK_PROFILE_INTERVAL"
	22	+	cef2gtkProfileOutputEnv = "DUMBER_CEF2GTK_PROFILE_OUTPUT"
	23	+	)
	24	+
	25	+	var errProfileWriterClosed = errors.New("cef2gtk profile writer is closed")
	26	+
	27	+	type lockedProfileWriter struct {
	28	+	mu sync.Mutex
	29	+	file *os.File
	30	+	}
	31	+
	32	+	func (w *lockedProfileWriter) Write(p []byte) (int, error) {
	33	+	if w == nil {
	34	+	return 0, errProfileWriterClosed
	35	+	}
	36	+	w.mu.Lock()
	37	+	defer w.mu.Unlock()
	38	+	if w.file == nil {
	39	+	return 0, errProfileWriterClosed
	40	+	}
	41	+	return w.file.Write(p)
	42	+	}
	43	+
	44	+	func (w *lockedProfileWriter) Close() error {
	45	+	if w == nil \|\| w.file == nil {
	46	+	return nil
	47	+	}
	48	+	w.mu.Lock()
	49	+	defer w.mu.Unlock()
	50	+	err := w.file.Close()
	51	+	w.file = nil
	52	+	return err
	53	+	}
	54	+
	55	+	func cef2gtkProfileEnabled() bool {
	56	+	v := strings.TrimSpace(strings.ToLower(os.Getenv(cef2gtkProfileEnv)))
	57	+	if v == "" {
	58	+	return false
	59	+	}
	60	+	if b, err := strconv.ParseBool(v); err == nil {
	61	+	return b
	62	+	}
	63	+	switch v {
	64	+	case "1", "yes", "on", "enabled":
	65	+	return true
	66	+	default:
	67	+	return false
	68	+	}
	69	+	}
	70	+
	71	+	func cef2gtkProfileInterval() time.Duration {
	72	+	v := strings.TrimSpace(os.Getenv(cef2gtkProfileIntervalEnv))
	73	+	if v == "" {
	74	+	return time.Second
	75	+	}
	76	+	d, err := time.ParseDuration(v)
	77	+	if err != nil \|\| d <= 0 {
	78	+	return time.Second
	79	+	}
	80	+	return d
	81	+	}
	82	+
	83	+	type cef2gtkProfileRecord struct {
	84	+	WebViewID uint64 `json:"webview_id"`
	85	+	Snapshot cef2gtk.ProfileSnapshot `json:"snapshot"`
	86	+	}
	87	+
	88	+	func (e Engine) cef2gtkProfileOptions(wv WebView) cef2gtk.ProfileOptions {
	89	+	if e == nil \|\| wv == nil \|\| !cef2gtkProfileEnabled() {
	90	+	return cef2gtk.ProfileOptions{}
	91	+	}
	92	+	path := e.cef2gtkProfilePath()
	93	+	if path == "" {
	94	+	return cef2gtk.ProfileOptions{}
	95	+	}
	96	+	if err := os.MkdirAll(filepath.Dir(path), 0o755); err != nil {
	97	+	logging.FromContext(e.ctx).Warn().Err(err).Str("path", path).Msg("cef2gtk: failed to create profile log directory")
	98	+	return cef2gtk.ProfileOptions{}
	99	+	}
	100	+	file, err := os.OpenFile(path, os.O_CREATE\|os.O_APPEND\|os.O_WRONLY, 0o644)
	101	+	if err != nil {
	102	+	logging.FromContext(e.ctx).Warn().Err(err).Str("path", path).Msg("cef2gtk: failed to open profile log")
	103	+	return cef2gtk.ProfileOptions{}
	104	+	}
	105	+	writer := &lockedProfileWriter{file: file}
	106	+	wv.profileCleanup = func() { _ = writer.Close() }
	107	+	logging.FromContext(e.ctx).Info().Str("profile_log", path).Uint64("webview_id", uint64(wv.id)).Msg("cef2gtk profiling enabled")
	108	+	return cef2gtk.ProfileOptions{
	109	+	Enabled: true,
	110	+	Interval: cef2gtkProfileInterval(),
	111	+	OnSnapshot: func(s cef2gtk.ProfileSnapshot) {
	112	+	wv.recordCEF2GTKProfileSnapshot(s)
	113	+	record := cef2gtkProfileRecord{WebViewID: uint64(wv.id), Snapshot: s}
	114	+	if b, err := json.Marshal(record); err == nil {
	115	+	_, _ = writer.Write(append(b, '\n'))
	116	+	}
	117	+	logging.FromContext(e.ctx).Debug().
	118	+	Uint64("webview_id", uint64(wv.id)).
	119	+	Uint64("frames_received", s.FramesReceived).
	120	+	Uint64("frames_rendered", s.FramesRendered).
	121	+	Uint32("gc_delta", s.GC.NumGCDelta).
	122	+	Msg("cef2gtk profile snapshot")
	123	+	},
	124	+	}
	125	+	}
	126	+
	127	+	func (wv *WebView) recordCEF2GTKProfileSnapshot(snapshot cef2gtk.ProfileSnapshot) {
	128	+	if wv == nil {
	129	+	return
	130	+	}
	131	+	wv.profileMu.Lock()
	132	+	wv.previousProfileSnapshot = wv.latestProfileSnapshot
	133	+	wv.latestProfileSnapshot = snapshot
	134	+	wv.latestProfileSnapshotAt = snapshot.Time
	135	+	wv.profileMu.Unlock()
	136	+	}
	137	+
	138	+	func (wv *WebView) latestCEF2GTKProfileSnapshot(now time.Time) (cef2gtk.ProfileSnapshot, time.Duration, bool) {
	139	+	if wv == nil {
	140	+	return cef2gtk.ProfileSnapshot{}, 0, false
	141	+	}
	142	+	wv.profileMu.Lock()
	143	+	snapshot := wv.latestProfileSnapshot
	144	+	snapshotAt := wv.latestProfileSnapshotAt
	145	+	wv.profileMu.Unlock()
	146	+	if snapshotAt.IsZero() {
	147	+	return cef2gtk.ProfileSnapshot{}, 0, false
	148	+	}
	149	+	age := now.Sub(snapshotAt)
	150	+	if age < 0 {
	151	+	age = 0
	152	+	}
	153	+	return snapshot, age, true
	154	+	}
	155	+
	156	+	func (e *Engine) cef2gtkProfilePath() string {
	157	+	if explicit := strings.TrimSpace(os.Getenv(cef2gtkProfileOutputEnv)); explicit != "" {
	158	+	return explicit
	159	+	}
	160	+	metadata, ok := logging.SessionMetadataFromContext(e.ctx)
	161	+	if !ok \|\| metadata.ID == "" {
	162	+	return ""
	163	+	}
	164	+	logDir := e.profileLogDir
	165	+	if metadata.LogPath != "" {
	166	+	logDir = filepath.Dir(metadata.LogPath)
	167	+	}
	168	+	if logDir == "" {
	169	+	return ""
	170	+	}
	171	+	return filepath.Join(logDir, fmt.Sprintf("session_%s_cef2gtk_profile.jsonl", metadata.ID))
	172	+	}

A internal/infrastructure/cef/profile_test.go +55 -0

@@ -0,0 +1,55 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"errors"
	6	+	"path/filepath"
	7	+	"testing"
	8	+
	9	+	"github.com/bnema/dumber/internal/application/port"
	10	+	"github.com/bnema/dumber/internal/logging"
	11	+	)
	12	+
	13	+	func TestCEF2GTKProfilePathUsesSessionLogDirectory(t *testing.T) {
	14	+	t.Setenv(cef2gtkProfileEnv, "1")
	15	+	logDir := t.TempDir()
	16	+	ctx := logging.WithSessionMetadata(context.Background(), "20260430_120000_abcd", filepath.Join(logDir, "session_20260430_120000_abcd.log"))
	17	+	eng := &Engine{ctx: ctx, profileLogDir: filepath.Join(t.TempDir(), "fallback")}
	18	+
	19	+	got := eng.cef2gtkProfilePath()
	20	+	want := filepath.Join(logDir, "session_20260430_120000_abcd_cef2gtk_profile.jsonl")
	21	+	if got != want {
	22	+	t.Fatalf("path = %q, want %q", got, want)
	23	+	}
	24	+	}
	25	+
	26	+	func TestCEF2GTKProfilePathAllowsExplicitOutput(t *testing.T) {
	27	+	explicit := filepath.Join(t.TempDir(), "profile.jsonl")
	28	+	t.Setenv(cef2gtkProfileOutputEnv, explicit)
	29	+	eng := &Engine{ctx: context.Background()}
	30	+
	31	+	if got := eng.cef2gtkProfilePath(); got != explicit {
	32	+	t.Fatalf("path = %q, want explicit output", got)
	33	+	}
	34	+	}
	35	+
	36	+	func TestCEF2GTKProfileOptionsDisabledByDefault(t *testing.T) {
	37	+	eng := &Engine{ctx: context.Background()}
	38	+	wv := &WebView{id: port.WebViewID(7)}
	39	+
	40	+	if opts := eng.cef2gtkProfileOptions(wv); opts.Enabled {
	41	+	t.Fatal("profile options enabled without env")
	42	+	}
	43	+	}
	44	+
	45	+	func TestLockedProfileWriterWriteReturnsErrorWhenClosed(t *testing.T) {
	46	+	var nilWriter *lockedProfileWriter
	47	+	if _, err := nilWriter.Write([]byte("x")); !errors.Is(err, errProfileWriterClosed) {
	48	+	t.Fatalf("nil writer error = %v, want %v", err, errProfileWriterClosed)
	49	+	}
	50	+
	51	+	writer := &lockedProfileWriter{}
	52	+	if _, err := writer.Write([]byte("x")); !errors.Is(err, errProfileWriterClosed) {
	53	+	t.Fatalf("closed writer error = %v, want %v", err, errProfileWriterClosed)
	54	+	}
	55	+	}

@@ -0,0 +1,55 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"errors"
	6	+	"path/filepath"
	7	+	"testing"
	8	+
	9	+	"github.com/bnema/dumber/internal/application/port"
	10	+	"github.com/bnema/dumber/internal/logging"
	11	+	)
	12	+
	13	+	func TestCEF2GTKProfilePathUsesSessionLogDirectory(t *testing.T) {
	14	+	t.Setenv(cef2gtkProfileEnv, "1")
	15	+	logDir := t.TempDir()
	16	+	ctx := logging.WithSessionMetadata(context.Background(), "20260430_120000_abcd", filepath.Join(logDir, "session_20260430_120000_abcd.log"))
	17	+	eng := &Engine{ctx: ctx, profileLogDir: filepath.Join(t.TempDir(), "fallback")}
	18	+
	19	+	got := eng.cef2gtkProfilePath()
	20	+	want := filepath.Join(logDir, "session_20260430_120000_abcd_cef2gtk_profile.jsonl")
	21	+	if got != want {
	22	+	t.Fatalf("path = %q, want %q", got, want)
	23	+	}
	24	+	}
	25	+
	26	+	func TestCEF2GTKProfilePathAllowsExplicitOutput(t *testing.T) {
	27	+	explicit := filepath.Join(t.TempDir(), "profile.jsonl")
	28	+	t.Setenv(cef2gtkProfileOutputEnv, explicit)
	29	+	eng := &Engine{ctx: context.Background()}
	30	+
	31	+	if got := eng.cef2gtkProfilePath(); got != explicit {
	32	+	t.Fatalf("path = %q, want explicit output", got)
	33	+	}
	34	+	}
	35	+
	36	+	func TestCEF2GTKProfileOptionsDisabledByDefault(t *testing.T) {
	37	+	eng := &Engine{ctx: context.Background()}
	38	+	wv := &WebView{id: port.WebViewID(7)}
	39	+
	40	+	if opts := eng.cef2gtkProfileOptions(wv); opts.Enabled {
	41	+	t.Fatal("profile options enabled without env")
	42	+	}
	43	+	}
	44	+
	45	+	func TestLockedProfileWriterWriteReturnsErrorWhenClosed(t *testing.T) {
	46	+	var nilWriter *lockedProfileWriter
	47	+	if _, err := nilWriter.Write([]byte("x")); !errors.Is(err, errProfileWriterClosed) {
	48	+	t.Fatalf("nil writer error = %v, want %v", err, errProfileWriterClosed)
	49	+	}
	50	+
	51	+	writer := &lockedProfileWriter{}
	52	+	if _, err := writer.Write([]byte("x")); !errors.Is(err, errProfileWriterClosed) {
	53	+	t.Fatalf("closed writer error = %v, want %v", err, errProfileWriterClosed)
	54	+	}
	55	+	}

A internal/infrastructure/cef/render_diagnostics.go +181 -0

@@ -0,0 +1,181 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"time"
	5	+
	6	+	purecef "github.com/bnema/purego-cef/cef"
	7	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	8	+
	9	+	"github.com/bnema/dumber/internal/application/port"
	10	+	"github.com/bnema/dumber/internal/logging"
	11	+	)
	12	+
	13	+	const renderStallRecoveryCooldown = 10 * time.Second
	14	+
	15	+	func (e *Engine) logAllWebViewRenderSnapshots(now time.Time, stalledID port.WebViewID, reason string, classification renderStallClassification) {
	16	+	if e == nil {
	17	+	return
	18	+	}
	19	+	e.activeWebViews.Range(func(_, value any) bool {
	20	+	wv, ok := value.(*WebView)
	21	+	if !ok \|\| wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() {
	22	+	return true
	23	+	}
	24	+	diag := wv.viewBridge.Diagnostics()
	25	+	lastPaintAge := time.Duration(0)
	26	+	if lastPaint := latestDiagnosticEventTime(diag, "accelerated-paint"); !lastPaint.IsZero() {
	27	+	lastPaintAge = now.Sub(lastPaint)
	28	+	}
	29	+	wv.mu.RLock()
	30	+	browser := wv.browser
	31	+	uri := wv.uri
	32	+	title := wv.title
	33	+	isLoading := wv.isLoading
	34	+	pendingURI := wv.pendingURI
	35	+	wv.mu.RUnlock()
	36	+	wv.logRenderDiagnosticSnapshot(now, reason, classification, wv.viewBridge, diag, lastPaintAge, browser, uri, title, isLoading, pendingURI, wv.audioPlaying.Load())
	37	+	return true
	38	+	})
	39	+	}
	40	+
	41	+	func (wv *WebView) logRenderDiagnosticSnapshot(
	42	+	now time.Time,
	43	+	reason string,
	44	+	classification renderStallClassification,
	45	+	bridge *Cef2gtkAdapter,
	46	+	diag cef2gtk.Diagnostics,
	47	+	lastPaintAge time.Duration,
	48	+	browser purecef.Browser,
	49	+	uri, title string,
	50	+	isLoading bool,
	51	+	pendingURI string,
	52	+	audioPlaying bool,
	53	+	) {
	54	+	if wv == nil \|\| wv.ctx == nil {
	55	+	return
	56	+	}
	57	+	var browserID int32
	58	+	if browser != nil {
	59	+	browserID = browser.GetIdentifier()
	60	+	}
	61	+	width, height := int32(0), int32(0)
	62	+	scale := float32(0)
	63	+	if bridge != nil {
	64	+	width, height = bridge.Size()
	65	+	scale = bridge.DeviceScaleFactor()
	66	+	}
	67	+	uiHeartbeat, ioHeartbeat := wv.cefHeartbeatSnapshots(now)
	68	+	profile, profileAge, hasProfile := wv.latestCEF2GTKProfileSnapshot(now)
	69	+	logging.FromContext(wv.ctx).Warn().
	70	+	Str("reason", reason).
	71	+	Str("classification", classification.Category).
	72	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	73	+	Bool("cef_io_alive", classification.CEFIOAlive).
	74	+	Uint64("webview_id", uint64(wv.id)).
	75	+	Int32("browser_id", browserID).
	76	+	Str("uri", logging.TruncateURL(uri, logging.PermissionLogURLMaxLen)).
	77	+	Str("title", title).
	78	+	Bool("is_loading", isLoading).
	79	+	Str("pending_uri", logging.TruncateURL(pendingURI, logging.PermissionLogURLMaxLen)).
	80	+	Bool("audio_playing", audioPlaying).
	81	+	Uint64("audio_packets", wv.audioPacketCount.Load()).
	82	+	Uint64("audio_writes", wv.audioWriteCount.Load()).
	83	+	Int64("last_accelerated_paint_age_ms", durationMillis(lastPaintAge)).
	84	+	Int("accelerated_paints", diag.AcceleratedPaints).
	85	+	Int("unsupported_paints", diag.UnsupportedPaints).
	86	+	Int("accelerated_paint_errors", diag.AcceleratedPaintErrors).
	87	+	Int("import_failures", diag.ImportFailures).
	88	+	Int("render_failures", diag.RenderFailures).
	89	+	Int32("surface_width", width).
	90	+	Int32("surface_height", height).
	91	+	Float32("surface_scale", scale).
	92	+	Bool("external_begin_frame", externalBeginFrameEnabled()).
	93	+	Bool("profile_snapshot_available", hasProfile).
	94	+	Int64("profile_snapshot_age_ms", durationMillis(profileAge)).
	95	+	Uint64("profile_frames_received", profile.FramesReceived).
	96	+	Uint64("profile_frames_queued", profile.FramesQueued).
	97	+	Uint64("profile_frames_rendered", profile.FramesRendered).
	98	+	Uint64("profile_import_failures", profile.ImportFailures).
	99	+	Uint64("profile_render_failures", profile.RenderFailures).
	100	+	Uint32("profile_gc_delta", profile.GC.NumGCDelta).
	101	+	Int64("cef_ui_heartbeat_ack_age_ms", durationMillis(uiHeartbeat.LastAckAge)).
	102	+	Int64("cef_ui_heartbeat_latency_ms", durationMillis(uiHeartbeat.Latency)).
	103	+	Int32("cef_ui_heartbeat_post_result", uiHeartbeat.PostResult).
	104	+	Bool("cef_ui_heartbeat_in_flight", uiHeartbeat.InFlight).
	105	+	Int64("cef_io_heartbeat_ack_age_ms", durationMillis(ioHeartbeat.LastAckAge)).
	106	+	Int64("cef_io_heartbeat_latency_ms", durationMillis(ioHeartbeat.Latency)).
	107	+	Int32("cef_io_heartbeat_post_result", ioHeartbeat.PostResult).
	108	+	Bool("cef_io_heartbeat_in_flight", ioHeartbeat.InFlight).
	109	+	Msg("cef: render diagnostic snapshot")
	110	+	}
	111	+
	112	+	func (wv WebView) maybeRunRenderStallRecovery(now time.Time, bridge Cef2gtkAdapter, paintsBefore int) {
	113	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallRecoveryEnabled() {
	114	+	return
	115	+	}
	116	+	wv.renderStallMu.Lock()
	117	+	last := wv.renderStallRecoveryLastAt
	118	+	if !last.IsZero() && now.Sub(last) < renderStallRecoveryCooldown {
	119	+	wv.renderStallMu.Unlock()
	120	+	return
	121	+	}
	122	+	wv.renderStallRecoveryLastAt = now
	123	+	wv.renderStallMu.Unlock()
	124	+
	125	+	wv.mu.RLock()
	126	+	host := wv.host
	127	+	browser := wv.browser
	128	+	wv.mu.RUnlock()
	129	+	if host == nil {
	130	+	return
	131	+	}
	132	+	browserID := int32(0)
	133	+	if browser != nil {
	134	+	browserID = browser.GetIdentifier()
	135	+	}
	136	+	logging.FromContext(wv.ctx).Warn().
	137	+	Uint64("webview_id", uint64(wv.id)).
	138	+	Int32("browser_id", browserID).
	139	+	Int("accelerated_paints_before", paintsBefore).
	140	+	Msg("cef: render stall recovery pulse scheduled")
	141	+	task := cefNewTask(cefTaskFunc(func() {
	142	+	if wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil \|\| host == nil {
	143	+	return
	144	+	}
	145	+	host.Invalidate(purecef.PaintElementTypePetView)
	146	+	host.WasHidden(1)
	147	+	host.WasHidden(0)
	148	+	host.NotifyScreenInfoChanged()
	149	+	host.WasResized()
	150	+	host.Invalidate(purecef.PaintElementTypePetView)
	151	+	logging.FromContext(wv.ctx).Warn().
	152	+	Uint64("webview_id", uint64(wv.id)).
	153	+	Int32("browser_id", browserID).
	154	+	Msg("cef: render stall recovery pulse executed")
	155	+	}))
	156	+	if task == nil {
	157	+	return
	158	+	}
	159	+	result := cefPostTask(purecef.ThreadIDTidUi, task)
	160	+	logging.FromContext(wv.ctx).Warn().
	161	+	Uint64("webview_id", uint64(wv.id)).
	162	+	Int32("browser_id", browserID).
	163	+	Int32("post_result", result).
	164	+	Msg("cef: render stall recovery pulse posted")
	165	+	if result != 1 {
	166	+	return
	167	+	}
	168	+	cefScheduleAfter(2*time.Second, func() {
	169	+	if wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil {
	170	+	return
	171	+	}
	172	+	after := wv.viewBridge.Diagnostics().AcceleratedPaints
	173	+	logging.FromContext(wv.ctx).Warn().
	174	+	Uint64("webview_id", uint64(wv.id)).
	175	+	Int32("browser_id", browserID).
	176	+	Int("accelerated_paints_before", paintsBefore).
	177	+	Int("accelerated_paints_after", after).
	178	+	Bool("recovered", after > paintsBefore).
	179	+	Msg("cef: render stall recovery pulse result")
	180	+	})
	181	+	}

@@ -0,0 +1,181 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"time"
	5	+
	6	+	purecef "github.com/bnema/purego-cef/cef"
	7	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	8	+
	9	+	"github.com/bnema/dumber/internal/application/port"
	10	+	"github.com/bnema/dumber/internal/logging"
	11	+	)
	12	+
	13	+	const renderStallRecoveryCooldown = 10 * time.Second
	14	+
	15	+	func (e *Engine) logAllWebViewRenderSnapshots(now time.Time, stalledID port.WebViewID, reason string, classification renderStallClassification) {
	16	+	if e == nil {
	17	+	return
	18	+	}
	19	+	e.activeWebViews.Range(func(_, value any) bool {
	20	+	wv, ok := value.(*WebView)
	21	+	if !ok \|\| wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() {
	22	+	return true
	23	+	}
	24	+	diag := wv.viewBridge.Diagnostics()
	25	+	lastPaintAge := time.Duration(0)
	26	+	if lastPaint := latestDiagnosticEventTime(diag, "accelerated-paint"); !lastPaint.IsZero() {
	27	+	lastPaintAge = now.Sub(lastPaint)
	28	+	}
	29	+	wv.mu.RLock()
	30	+	browser := wv.browser
	31	+	uri := wv.uri
	32	+	title := wv.title
	33	+	isLoading := wv.isLoading
	34	+	pendingURI := wv.pendingURI
	35	+	wv.mu.RUnlock()
	36	+	wv.logRenderDiagnosticSnapshot(now, reason, classification, wv.viewBridge, diag, lastPaintAge, browser, uri, title, isLoading, pendingURI, wv.audioPlaying.Load())
	37	+	return true
	38	+	})
	39	+	}
	40	+
	41	+	func (wv *WebView) logRenderDiagnosticSnapshot(
	42	+	now time.Time,
	43	+	reason string,
	44	+	classification renderStallClassification,
	45	+	bridge *Cef2gtkAdapter,
	46	+	diag cef2gtk.Diagnostics,
	47	+	lastPaintAge time.Duration,
	48	+	browser purecef.Browser,
	49	+	uri, title string,
	50	+	isLoading bool,
	51	+	pendingURI string,
	52	+	audioPlaying bool,
	53	+	) {
	54	+	if wv == nil \|\| wv.ctx == nil {
	55	+	return
	56	+	}
	57	+	var browserID int32
	58	+	if browser != nil {
	59	+	browserID = browser.GetIdentifier()
	60	+	}
	61	+	width, height := int32(0), int32(0)
	62	+	scale := float32(0)
	63	+	if bridge != nil {
	64	+	width, height = bridge.Size()
	65	+	scale = bridge.DeviceScaleFactor()
	66	+	}
	67	+	uiHeartbeat, ioHeartbeat := wv.cefHeartbeatSnapshots(now)
	68	+	profile, profileAge, hasProfile := wv.latestCEF2GTKProfileSnapshot(now)
	69	+	logging.FromContext(wv.ctx).Warn().
	70	+	Str("reason", reason).
	71	+	Str("classification", classification.Category).
	72	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	73	+	Bool("cef_io_alive", classification.CEFIOAlive).
	74	+	Uint64("webview_id", uint64(wv.id)).
	75	+	Int32("browser_id", browserID).
	76	+	Str("uri", logging.TruncateURL(uri, logging.PermissionLogURLMaxLen)).
	77	+	Str("title", title).
	78	+	Bool("is_loading", isLoading).
	79	+	Str("pending_uri", logging.TruncateURL(pendingURI, logging.PermissionLogURLMaxLen)).
	80	+	Bool("audio_playing", audioPlaying).
	81	+	Uint64("audio_packets", wv.audioPacketCount.Load()).
	82	+	Uint64("audio_writes", wv.audioWriteCount.Load()).
	83	+	Int64("last_accelerated_paint_age_ms", durationMillis(lastPaintAge)).
	84	+	Int("accelerated_paints", diag.AcceleratedPaints).
	85	+	Int("unsupported_paints", diag.UnsupportedPaints).
	86	+	Int("accelerated_paint_errors", diag.AcceleratedPaintErrors).
	87	+	Int("import_failures", diag.ImportFailures).
	88	+	Int("render_failures", diag.RenderFailures).
	89	+	Int32("surface_width", width).
	90	+	Int32("surface_height", height).
	91	+	Float32("surface_scale", scale).
	92	+	Bool("external_begin_frame", externalBeginFrameEnabled()).
	93	+	Bool("profile_snapshot_available", hasProfile).
	94	+	Int64("profile_snapshot_age_ms", durationMillis(profileAge)).
	95	+	Uint64("profile_frames_received", profile.FramesReceived).
	96	+	Uint64("profile_frames_queued", profile.FramesQueued).
	97	+	Uint64("profile_frames_rendered", profile.FramesRendered).
	98	+	Uint64("profile_import_failures", profile.ImportFailures).
	99	+	Uint64("profile_render_failures", profile.RenderFailures).
	100	+	Uint32("profile_gc_delta", profile.GC.NumGCDelta).
	101	+	Int64("cef_ui_heartbeat_ack_age_ms", durationMillis(uiHeartbeat.LastAckAge)).
	102	+	Int64("cef_ui_heartbeat_latency_ms", durationMillis(uiHeartbeat.Latency)).
	103	+	Int32("cef_ui_heartbeat_post_result", uiHeartbeat.PostResult).
	104	+	Bool("cef_ui_heartbeat_in_flight", uiHeartbeat.InFlight).
	105	+	Int64("cef_io_heartbeat_ack_age_ms", durationMillis(ioHeartbeat.LastAckAge)).
	106	+	Int64("cef_io_heartbeat_latency_ms", durationMillis(ioHeartbeat.Latency)).
	107	+	Int32("cef_io_heartbeat_post_result", ioHeartbeat.PostResult).
	108	+	Bool("cef_io_heartbeat_in_flight", ioHeartbeat.InFlight).
	109	+	Msg("cef: render diagnostic snapshot")
	110	+	}
	111	+
	112	+	func (wv WebView) maybeRunRenderStallRecovery(now time.Time, bridge Cef2gtkAdapter, paintsBefore int) {
	113	+	if wv == nil \|\| wv.ctx == nil \|\| wv.destroyed.Load() \|\| !renderStallRecoveryEnabled() {
	114	+	return
	115	+	}
	116	+	wv.renderStallMu.Lock()
	117	+	last := wv.renderStallRecoveryLastAt
	118	+	if !last.IsZero() && now.Sub(last) < renderStallRecoveryCooldown {
	119	+	wv.renderStallMu.Unlock()
	120	+	return
	121	+	}
	122	+	wv.renderStallRecoveryLastAt = now
	123	+	wv.renderStallMu.Unlock()
	124	+
	125	+	wv.mu.RLock()
	126	+	host := wv.host
	127	+	browser := wv.browser
	128	+	wv.mu.RUnlock()
	129	+	if host == nil {
	130	+	return
	131	+	}
	132	+	browserID := int32(0)
	133	+	if browser != nil {
	134	+	browserID = browser.GetIdentifier()
	135	+	}
	136	+	logging.FromContext(wv.ctx).Warn().
	137	+	Uint64("webview_id", uint64(wv.id)).
	138	+	Int32("browser_id", browserID).
	139	+	Int("accelerated_paints_before", paintsBefore).
	140	+	Msg("cef: render stall recovery pulse scheduled")
	141	+	task := cefNewTask(cefTaskFunc(func() {
	142	+	if wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil \|\| host == nil {
	143	+	return
	144	+	}
	145	+	host.Invalidate(purecef.PaintElementTypePetView)
	146	+	host.WasHidden(1)
	147	+	host.WasHidden(0)
	148	+	host.NotifyScreenInfoChanged()
	149	+	host.WasResized()
	150	+	host.Invalidate(purecef.PaintElementTypePetView)
	151	+	logging.FromContext(wv.ctx).Warn().
	152	+	Uint64("webview_id", uint64(wv.id)).
	153	+	Int32("browser_id", browserID).
	154	+	Msg("cef: render stall recovery pulse executed")
	155	+	}))
	156	+	if task == nil {
	157	+	return
	158	+	}
	159	+	result := cefPostTask(purecef.ThreadIDTidUi, task)
	160	+	logging.FromContext(wv.ctx).Warn().
	161	+	Uint64("webview_id", uint64(wv.id)).
	162	+	Int32("browser_id", browserID).
	163	+	Int32("post_result", result).
	164	+	Msg("cef: render stall recovery pulse posted")
	165	+	if result != 1 {
	166	+	return
	167	+	}
	168	+	cefScheduleAfter(2*time.Second, func() {
	169	+	if wv == nil \|\| wv.viewBridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil {
	170	+	return
	171	+	}
	172	+	after := wv.viewBridge.Diagnostics().AcceleratedPaints
	173	+	logging.FromContext(wv.ctx).Warn().
	174	+	Uint64("webview_id", uint64(wv.id)).
	175	+	Int32("browser_id", browserID).
	176	+	Int("accelerated_paints_before", paintsBefore).
	177	+	Int("accelerated_paints_after", after).
	178	+	Bool("recovered", after > paintsBefore).
	179	+	Msg("cef: render stall recovery pulse result")
	180	+	})
	181	+	}

A internal/infrastructure/cef/render_stack_env.go +80 -0

@@ -0,0 +1,80 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"os"
	6	+	"strings"
	7	+
	8	+	"github.com/bnema/dumber/internal/logging"
	9	+	)
	10	+
	11	+	const (
	12	+	dumberRenderStackEnvVar = "DUMBER_RENDER_STACK"
	13	+
	14	+	renderStackAuto = "auto"
	15	+	renderStackVulkanDMABUF = "vulkan-dmabuf"
	16	+	renderStackLegacyGL = "legacy-gl"
	17	+	cef2gtkBackendEnvVar = "PUREGO_CEF2GTK_BACKEND"
	18	+	cef2gtkAngleBackendVar = "PUREGO_CEF2GTK_ANGLE_BACKEND"
	19	+	gskRendererEnvVar = "GSK_RENDERER"
	20	+	cef2gtkBackendGDKDMABUF = "gdk-dmabuf"
	21	+	cef2gtkBackendGLArea = "glarea"
	22	+	cef2gtkAngleVulkan = "vulkan"
	23	+	cef2gtkAngleGLEGL = "gl-egl"
	24	+	gskRendererVulkan = "vulkan"
	25	+	gskRendererOpenGL = "opengl"
	26	+	)
	27	+
	28	+	// ApplyDefaultRenderStackEnvironment configures the process environment for
	29	+	// Dumber's default CEF presentation stack before GTK/libadwaita initialize.
	30	+	//
	31	+	// DUMBER_RENDER_STACK accepts:
	32	+	// - auto or empty: use the GPU-first GDK DMABUF stack
	33	+	// - vulkan-dmabuf: force GDK DMABUF presentation with GSK Vulkan and CEF ANGLE GL/EGL
	34	+	// - legacy-gl: force the older GtkGLArea/OpenGL bridge for diagnostics
	35	+	//
	36	+	// Low-level env vars remain diagnostic escape hatches: when explicitly set,
	37	+	// they are preserved instead of overwritten.
	38	+	func ApplyDefaultRenderStackEnvironment(ctx context.Context) string {
	39	+	return applyDefaultRenderStackEnvironment(ctx)
	40	+	}
	41	+
	42	+	func applyDefaultRenderStackEnvironment(ctx context.Context) string {
	43	+	switch normalizeRenderStack(os.Getenv(dumberRenderStackEnvVar)) {
	44	+	case renderStackLegacyGL:
	45	+	setEnvDefault(ctx, gskRendererEnvVar, gskRendererOpenGL)
	46	+	setEnvDefault(ctx, cef2gtkBackendEnvVar, cef2gtkBackendGLArea)
	47	+	setEnvDefault(ctx, cef2gtkAngleBackendVar, cef2gtkAngleGLEGL)
	48	+	return renderStackLegacyGL
	49	+	default:
	50	+	setEnvDefault(ctx, gskRendererEnvVar, gskRendererVulkan)
	51	+	setEnvDefault(ctx, cef2gtkBackendEnvVar, cef2gtkBackendGDKDMABUF)
	52	+	setEnvDefault(ctx, cef2gtkAngleBackendVar, cef2gtkAngleGLEGL)
	53	+	return renderStackVulkanDMABUF
	54	+	}
	55	+	}
	56	+
	57	+	func normalizeRenderStack(value string) string {
	58	+	switch strings.ToLower(strings.TrimSpace(value)) {
	59	+	case "", renderStackAuto, renderStackVulkanDMABUF:
	60	+	return renderStackVulkanDMABUF
	61	+	case renderStackLegacyGL:
	62	+	return renderStackLegacyGL
	63	+	default:
	64	+	return renderStackVulkanDMABUF
	65	+	}
	66	+	}
	67	+
	68	+	func setEnvDefault(ctx context.Context, key, value string) {
	69	+	if existing := strings.TrimSpace(os.Getenv(key)); existing != "" {
	70	+	if ctx == nil {
	71	+	ctx = context.Background()
	72	+	}
	73	+	logging.FromContext(ctx).Debug().
	74	+	Str("key", key).
	75	+	Str("value", existing).
	76	+	Msg("cef: preserving explicit render stack environment override")
	77	+	return
	78	+	}
	79	+	_ = os.Setenv(key, value)
	80	+	}

@@ -0,0 +1,80 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"os"
	6	+	"strings"
	7	+
	8	+	"github.com/bnema/dumber/internal/logging"
	9	+	)
	10	+
	11	+	const (
	12	+	dumberRenderStackEnvVar = "DUMBER_RENDER_STACK"
	13	+
	14	+	renderStackAuto = "auto"
	15	+	renderStackVulkanDMABUF = "vulkan-dmabuf"
	16	+	renderStackLegacyGL = "legacy-gl"
	17	+	cef2gtkBackendEnvVar = "PUREGO_CEF2GTK_BACKEND"
	18	+	cef2gtkAngleBackendVar = "PUREGO_CEF2GTK_ANGLE_BACKEND"
	19	+	gskRendererEnvVar = "GSK_RENDERER"
	20	+	cef2gtkBackendGDKDMABUF = "gdk-dmabuf"
	21	+	cef2gtkBackendGLArea = "glarea"
	22	+	cef2gtkAngleVulkan = "vulkan"
	23	+	cef2gtkAngleGLEGL = "gl-egl"
	24	+	gskRendererVulkan = "vulkan"
	25	+	gskRendererOpenGL = "opengl"
	26	+	)
	27	+
	28	+	// ApplyDefaultRenderStackEnvironment configures the process environment for
	29	+	// Dumber's default CEF presentation stack before GTK/libadwaita initialize.
	30	+	//
	31	+	// DUMBER_RENDER_STACK accepts:
	32	+	// - auto or empty: use the GPU-first GDK DMABUF stack
	33	+	// - vulkan-dmabuf: force GDK DMABUF presentation with GSK Vulkan and CEF ANGLE GL/EGL
	34	+	// - legacy-gl: force the older GtkGLArea/OpenGL bridge for diagnostics
	35	+	//
	36	+	// Low-level env vars remain diagnostic escape hatches: when explicitly set,
	37	+	// they are preserved instead of overwritten.
	38	+	func ApplyDefaultRenderStackEnvironment(ctx context.Context) string {
	39	+	return applyDefaultRenderStackEnvironment(ctx)
	40	+	}
	41	+
	42	+	func applyDefaultRenderStackEnvironment(ctx context.Context) string {
	43	+	switch normalizeRenderStack(os.Getenv(dumberRenderStackEnvVar)) {
	44	+	case renderStackLegacyGL:
	45	+	setEnvDefault(ctx, gskRendererEnvVar, gskRendererOpenGL)
	46	+	setEnvDefault(ctx, cef2gtkBackendEnvVar, cef2gtkBackendGLArea)
	47	+	setEnvDefault(ctx, cef2gtkAngleBackendVar, cef2gtkAngleGLEGL)
	48	+	return renderStackLegacyGL
	49	+	default:
	50	+	setEnvDefault(ctx, gskRendererEnvVar, gskRendererVulkan)
	51	+	setEnvDefault(ctx, cef2gtkBackendEnvVar, cef2gtkBackendGDKDMABUF)
	52	+	setEnvDefault(ctx, cef2gtkAngleBackendVar, cef2gtkAngleGLEGL)
	53	+	return renderStackVulkanDMABUF
	54	+	}
	55	+	}
	56	+
	57	+	func normalizeRenderStack(value string) string {
	58	+	switch strings.ToLower(strings.TrimSpace(value)) {
	59	+	case "", renderStackAuto, renderStackVulkanDMABUF:
	60	+	return renderStackVulkanDMABUF
	61	+	case renderStackLegacyGL:
	62	+	return renderStackLegacyGL
	63	+	default:
	64	+	return renderStackVulkanDMABUF
	65	+	}
	66	+	}
	67	+
	68	+	func setEnvDefault(ctx context.Context, key, value string) {
	69	+	if existing := strings.TrimSpace(os.Getenv(key)); existing != "" {
	70	+	if ctx == nil {
	71	+	ctx = context.Background()
	72	+	}
	73	+	logging.FromContext(ctx).Debug().
	74	+	Str("key", key).
	75	+	Str("value", existing).
	76	+	Msg("cef: preserving explicit render stack environment override")
	77	+	return
	78	+	}
	79	+	_ = os.Setenv(key, value)
	80	+	}

A internal/infrastructure/cef/render_stack_env_test.go +70 -0

@@ -0,0 +1,70 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"os"
	6	+	"testing"
	7	+	)
	8	+
	9	+	func TestApplyDefaultRenderStackEnvironment_DefaultsToGDKDMABUFWithANGLEGL(t *testing.T) {
	10	+	t.Setenv(dumberRenderStackEnvVar, "")
	11	+	t.Setenv("GSK_RENDERER", "")
	12	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "")
	13	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "")
	14	+
	15	+	got := applyDefaultRenderStackEnvironment(context.Background())
	16	+
	17	+	if got != renderStackVulkanDMABUF {
	18	+	t.Fatalf("render stack = %q, want %q", got, renderStackVulkanDMABUF)
	19	+	}
	20	+	if got := os.Getenv("GSK_RENDERER"); got != "vulkan" {
	21	+	t.Fatalf("GSK_RENDERER = %q, want vulkan", got)
	22	+	}
	23	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "gdk-dmabuf" {
	24	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want gdk-dmabuf", got)
	25	+	}
	26	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	27	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want gl-egl", got)
	28	+	}
	29	+	}
	30	+
	31	+	func TestApplyDefaultRenderStackEnvironment_PreservesExplicitLowLevelOverrides(t *testing.T) {
	32	+	t.Setenv(dumberRenderStackEnvVar, "")
	33	+	t.Setenv("GSK_RENDERER", "ngl")
	34	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "glarea")
	35	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "gl-egl")
	36	+
	37	+	got := applyDefaultRenderStackEnvironment(context.Background())
	38	+
	39	+	if got != renderStackVulkanDMABUF {
	40	+	t.Fatalf("render stack = %q, want %q", got, renderStackVulkanDMABUF)
	41	+	}
	42	+	if got := os.Getenv("GSK_RENDERER"); got != "ngl" {
	43	+	t.Fatalf("GSK_RENDERER = %q, want explicit ngl", got)
	44	+	}
	45	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "glarea" {
	46	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want explicit glarea", got)
	47	+	}
	48	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	49	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want explicit gl-egl", got)
	50	+	}
	51	+	}
	52	+
	53	+	func TestApplyDefaultRenderStackEnvironment_LegacyGLUsesGLArea(t *testing.T) {
	54	+	t.Setenv(dumberRenderStackEnvVar, "legacy-gl")
	55	+	t.Setenv("GSK_RENDERER", "")
	56	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "")
	57	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "")
	58	+
	59	+	got := applyDefaultRenderStackEnvironment(context.Background())
	60	+
	61	+	if got != renderStackLegacyGL {
	62	+	t.Fatalf("render stack = %q, want %q", got, renderStackLegacyGL)
	63	+	}
	64	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "glarea" {
	65	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want glarea", got)
	66	+	}
	67	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	68	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want gl-egl", got)
	69	+	}
	70	+	}

@@ -0,0 +1,70 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"os"
	6	+	"testing"
	7	+	)
	8	+
	9	+	func TestApplyDefaultRenderStackEnvironment_DefaultsToGDKDMABUFWithANGLEGL(t *testing.T) {
	10	+	t.Setenv(dumberRenderStackEnvVar, "")
	11	+	t.Setenv("GSK_RENDERER", "")
	12	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "")
	13	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "")
	14	+
	15	+	got := applyDefaultRenderStackEnvironment(context.Background())
	16	+
	17	+	if got != renderStackVulkanDMABUF {
	18	+	t.Fatalf("render stack = %q, want %q", got, renderStackVulkanDMABUF)
	19	+	}
	20	+	if got := os.Getenv("GSK_RENDERER"); got != "vulkan" {
	21	+	t.Fatalf("GSK_RENDERER = %q, want vulkan", got)
	22	+	}
	23	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "gdk-dmabuf" {
	24	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want gdk-dmabuf", got)
	25	+	}
	26	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	27	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want gl-egl", got)
	28	+	}
	29	+	}
	30	+
	31	+	func TestApplyDefaultRenderStackEnvironment_PreservesExplicitLowLevelOverrides(t *testing.T) {
	32	+	t.Setenv(dumberRenderStackEnvVar, "")
	33	+	t.Setenv("GSK_RENDERER", "ngl")
	34	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "glarea")
	35	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "gl-egl")
	36	+
	37	+	got := applyDefaultRenderStackEnvironment(context.Background())
	38	+
	39	+	if got != renderStackVulkanDMABUF {
	40	+	t.Fatalf("render stack = %q, want %q", got, renderStackVulkanDMABUF)
	41	+	}
	42	+	if got := os.Getenv("GSK_RENDERER"); got != "ngl" {
	43	+	t.Fatalf("GSK_RENDERER = %q, want explicit ngl", got)
	44	+	}
	45	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "glarea" {
	46	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want explicit glarea", got)
	47	+	}
	48	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	49	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want explicit gl-egl", got)
	50	+	}
	51	+	}
	52	+
	53	+	func TestApplyDefaultRenderStackEnvironment_LegacyGLUsesGLArea(t *testing.T) {
	54	+	t.Setenv(dumberRenderStackEnvVar, "legacy-gl")
	55	+	t.Setenv("GSK_RENDERER", "")
	56	+	t.Setenv("PUREGO_CEF2GTK_BACKEND", "")
	57	+	t.Setenv("PUREGO_CEF2GTK_ANGLE_BACKEND", "")
	58	+
	59	+	got := applyDefaultRenderStackEnvironment(context.Background())
	60	+
	61	+	if got != renderStackLegacyGL {
	62	+	t.Fatalf("render stack = %q, want %q", got, renderStackLegacyGL)
	63	+	}
	64	+	if got := os.Getenv("PUREGO_CEF2GTK_BACKEND"); got != "glarea" {
	65	+	t.Fatalf("PUREGO_CEF2GTK_BACKEND = %q, want glarea", got)
	66	+	}
	67	+	if got := os.Getenv("PUREGO_CEF2GTK_ANGLE_BACKEND"); got != "gl-egl" {
	68	+	t.Fatalf("PUREGO_CEF2GTK_ANGLE_BACKEND = %q, want gl-egl", got)
	69	+	}
	70	+	}

A internal/infrastructure/cef/render_stall_watchdog.go +240 -0

@@ -0,0 +1,240 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"time"
	5	+
	6	+	purecef "github.com/bnema/purego-cef/cef"
	7	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	8	+
	9	+	"github.com/bnema/dumber/internal/logging"
	10	+	)
	11	+
	12	+	const (
	13	+	renderStallWatchdogInterval = 1 * time.Second
	14	+	renderStallWarnAfter = 3 * time.Second
	15	+	renderStallWarnRepeat = 10 * time.Second
	16	+	renderStallCEFUIBlockedAfter = 3 * time.Second
	17	+	)
	18	+
	19	+	type renderStallClassification struct {
	20	+	Category string
	21	+	CEFUIBlocked bool
	22	+	CEFIOAlive bool
	23	+	}
	24	+
	25	+	type renderStallDiagnostics struct {
	26	+	browser purecef.Browser
	27	+	uri string
	28	+	title string
	29	+	isLoading bool
	30	+	pendingURI string
	31	+	audioPlaying bool
	32	+	diag cef2gtk.Diagnostics
	33	+	lastPaintAge time.Duration
	34	+	latestEvent cef2gtk.DiagnosticEvent
	35	+	}
	36	+
	37	+	func classifyRenderStall(uiHeartbeat, ioHeartbeat cefHeartbeatSnapshot) renderStallClassification {
	38	+	uiBlocked := uiHeartbeat.PostResult == 1 && uiHeartbeat.InFlight && uiHeartbeat.LastAckAge >= renderStallCEFUIBlockedAfter
	39	+	ioAlive := ioHeartbeat.PostResult == 1 && !ioHeartbeat.InFlight && ioHeartbeat.LastAckAge > 0 && ioHeartbeat.LastAckAge < renderStallCEFUIBlockedAfter
	40	+	category := "osr-paint-stalled"
	41	+	if uiBlocked {
	42	+	category = "cef-ui-task-runner-blocked"
	43	+	if ioAlive {
	44	+	category = "cef-ui-task-runner-blocked-io-alive"
	45	+	}
	46	+	}
	47	+	return renderStallClassification{Category: category, CEFUIBlocked: uiBlocked, CEFIOAlive: ioAlive}
	48	+	}
	49	+
	50	+	func (wv *WebView) startRenderStallWatchdog() {
	51	+	if wv == nil \|\| wv.ctx == nil \|\| wv.viewBridge == nil {
	52	+	return
	53	+	}
	54	+
	55	+	wv.renderStallMu.Lock()
	56	+	defer wv.renderStallMu.Unlock()
	57	+	if wv.renderStallStop != nil {
	58	+	return
	59	+	}
	60	+
	61	+	stop := make(chan struct{})
	62	+	done := make(chan struct{})
	63	+	bridge := wv.viewBridge
	64	+	wv.renderStallStop = stop
	65	+	wv.renderStallDone = done
	66	+
	67	+	go wv.renderStallWatchdogLoop(bridge, stop, done)
	68	+	}
	69	+
	70	+	func (wv *WebView) stopRenderStallWatchdog() {
	71	+	if wv == nil {
	72	+	return
	73	+	}
	74	+	wv.renderStallMu.Lock()
	75	+	stop := wv.renderStallStop
	76	+	done := wv.renderStallDone
	77	+	wv.renderStallStop = nil
	78	+	wv.renderStallDone = nil
	79	+	wv.renderStallMu.Unlock()
	80	+
	81	+	if stop == nil \|\| done == nil {
	82	+	return
	83	+	}
	84	+	close(stop)
	85	+	<-done
	86	+	}
	87	+
	88	+	func (wv WebView) renderStallWatchdogLoop(bridge Cef2gtkAdapter, stop <-chan struct{}, done chan<- struct{}) {
	89	+	defer close(done)
	90	+	ticker := time.NewTicker(renderStallWatchdogInterval)
	91	+	defer ticker.Stop()
	92	+
	93	+	var lastWarn time.Time
	94	+	for {
	95	+	select {
	96	+	case <-stop:
	97	+	return
	98	+	case now := <-ticker.C:
	99	+	if wv.maybeLogRenderStall(bridge, now, lastWarn) {
	100	+	lastWarn = now
	101	+	}
	102	+	}
	103	+	}
	104	+	}
	105	+
	106	+	func (wv WebView) maybeLogRenderStall(bridge Cef2gtkAdapter, now, lastWarn time.Time) bool {
	107	+	diag, ok := wv.shouldLogRenderStall(bridge, now, lastWarn)
	108	+	if !ok {
	109	+	return false
	110	+	}
	111	+	wv.logRenderStall(bridge, now, diag)
	112	+	return true
	113	+	}
	114	+
	115	+	func (wv WebView) shouldLogRenderStall(bridge Cef2gtkAdapter, now, lastWarn time.Time) (renderStallDiagnostics, bool) {
	116	+	if wv == nil \|\| bridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil {
	117	+	return renderStallDiagnostics{}, false
	118	+	}
	119	+	diag, ok := wv.collectStallDiagnostics(bridge, now)
	120	+	if !ok {
	121	+	return renderStallDiagnostics{}, false
	122	+	}
	123	+	if diag.lastPaintAge < renderStallWarnAfter {
	124	+	return renderStallDiagnostics{}, false
	125	+	}
	126	+	if !lastWarn.IsZero() && now.Sub(lastWarn) < renderStallWarnRepeat {
	127	+	return renderStallDiagnostics{}, false
	128	+	}
	129	+	return diag, true
	130	+	}
	131	+
	132	+	func (wv WebView) collectStallDiagnostics(bridge Cef2gtkAdapter, now time.Time) (renderStallDiagnostics, bool) {
	133	+	wv.mu.RLock()
	134	+	browser := wv.browser
	135	+	uri := wv.uri
	136	+	title := wv.title
	137	+	isLoading := wv.isLoading
	138	+	pendingURI := wv.pendingURI
	139	+	wv.mu.RUnlock()
	140	+	if browser == nil {
	141	+	return renderStallDiagnostics{}, false
	142	+	}
	143	+
	144	+	audioPlaying := wv.audioPlaying.Load()
	145	+	if !audioPlaying && !isLoading && pendingURI == "" {
	146	+	return renderStallDiagnostics{}, false
	147	+	}
	148	+
	149	+	diag := bridge.Diagnostics()
	150	+	lastPaint := latestDiagnosticEventTime(diag, "accelerated-paint")
	151	+	if lastPaint.IsZero() {
	152	+	return renderStallDiagnostics{}, false
	153	+	}
	154	+	return renderStallDiagnostics{
	155	+	browser: browser,
	156	+	uri: uri,
	157	+	title: title,
	158	+	isLoading: isLoading,
	159	+	pendingURI: pendingURI,
	160	+	audioPlaying: audioPlaying,
	161	+	diag: diag,
	162	+	lastPaintAge: now.Sub(lastPaint),
	163	+	latestEvent: latestDiagnosticEvent(diag),
	164	+	}, true
	165	+	}
	166	+
	167	+	func (wv WebView) logRenderStall(bridge Cef2gtkAdapter, now time.Time, diag renderStallDiagnostics) {
	168	+	uiHeartbeat, ioHeartbeat := wv.cefHeartbeatSnapshots(now)
	169	+	classification := classifyRenderStall(uiHeartbeat, ioHeartbeat)
	170	+	wv.logRenderDiagnosticSnapshot(now, "stall", classification, bridge, diag.diag, diag.lastPaintAge, diag.browser, diag.uri, diag.title, diag.isLoading, diag.pendingURI, diag.audioPlaying)
	171	+	wv.logCEFProcessDiagnostics("stall", classification)
	172	+	if wv.engine != nil {
	173	+	wv.engine.logAllWebViewRenderSnapshots(now, wv.id, "stall-global", classification)
	174	+	}
	175	+	wv.maybeRunRenderStallRecovery(now, bridge, diag.diag.AcceleratedPaints)
	176	+	profile, profileAge, hasProfile := wv.latestCEF2GTKProfileSnapshot(now)
	177	+	logging.FromContext(wv.ctx).Warn().
	178	+	Str("classification", classification.Category).
	179	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	180	+	Bool("cef_io_alive", classification.CEFIOAlive).
	181	+	Uint64("webview_id", uint64(wv.id)).
	182	+	Int32("browser_id", diag.browser.GetIdentifier()).
	183	+	Str("uri", logging.TruncateURL(diag.uri, logging.PermissionLogURLMaxLen)).
	184	+	Str("title", diag.title).
	185	+	Bool("is_loading", diag.isLoading).
	186	+	Str("pending_uri", logging.TruncateURL(diag.pendingURI, logging.PermissionLogURLMaxLen)).
	187	+	Bool("audio_playing", diag.audioPlaying).
	188	+	Int64("cef_ui_heartbeat_ack_age_ms", durationMillis(uiHeartbeat.LastAckAge)).
	189	+	Int64("cef_ui_heartbeat_latency_ms", durationMillis(uiHeartbeat.Latency)).
	190	+	Int32("cef_ui_heartbeat_post_result", uiHeartbeat.PostResult).
	191	+	Bool("cef_ui_heartbeat_in_flight", uiHeartbeat.InFlight).
	192	+	Int64("cef_io_heartbeat_ack_age_ms", durationMillis(ioHeartbeat.LastAckAge)).
	193	+	Int64("cef_io_heartbeat_latency_ms", durationMillis(ioHeartbeat.Latency)).
	194	+	Int32("cef_io_heartbeat_post_result", ioHeartbeat.PostResult).
	195	+	Bool("cef_io_heartbeat_in_flight", ioHeartbeat.InFlight).
	196	+	Uint64("audio_packets", wv.audioPacketCount.Load()).
	197	+	Uint64("audio_writes", wv.audioWriteCount.Load()).
	198	+	Int64("last_accelerated_paint_age_ms", diag.lastPaintAge.Milliseconds()).
	199	+	Bool("profile_snapshot_available", hasProfile).
	200	+	Int64("profile_snapshot_age_ms", durationMillis(profileAge)).
	201	+	Uint64("profile_frames_received", profile.FramesReceived).
	202	+	Uint64("profile_frames_queued", profile.FramesQueued).
	203	+	Uint64("profile_frames_rendered", profile.FramesRendered).
	204	+	Uint32("profile_gc_delta", profile.GC.NumGCDelta).
	205	+	Int("accelerated_paints", diag.diag.AcceleratedPaints).
	206	+	Int("unsupported_paints", diag.diag.UnsupportedPaints).
	207	+	Int("accelerated_paint_errors", diag.diag.AcceleratedPaintErrors).
	208	+	Int("import_failures", diag.diag.ImportFailures).
	209	+	Int("render_failures", diag.diag.RenderFailures).
	210	+	Str("latest_render_event_kind", diag.latestEvent.Kind).
	211	+	Str("latest_render_event_message", diag.latestEvent.Message).
	212	+	Msg("cef: accelerated rendering appears stalled")
	213	+	}
	214	+
	215	+	func latestDiagnosticEventTime(diag cef2gtk.Diagnostics, kind string) time.Time {
	216	+	return latestDiagnosticEventOfKind(diag, kind).Time
	217	+	}
	218	+
	219	+	func latestDiagnosticEventOfKind(diag cef2gtk.Diagnostics, kind string) cef2gtk.DiagnosticEvent {
	220	+	var latest cef2gtk.DiagnosticEvent
	221	+	for _, event := range diag.Events {
	222	+	if event.Kind != kind {
	223	+	continue
	224	+	}
	225	+	if latest.Time.IsZero() \|\| event.Time.After(latest.Time) {
	226	+	latest = event
	227	+	}
	228	+	}
	229	+	return latest
	230	+	}
	231	+
	232	+	func latestDiagnosticEvent(diag cef2gtk.Diagnostics) cef2gtk.DiagnosticEvent {
	233	+	var latest cef2gtk.DiagnosticEvent
	234	+	for _, event := range diag.Events {
	235	+	if latest.Time.IsZero() \|\| event.Time.After(latest.Time) {
	236	+	latest = event
	237	+	}
	238	+	}
	239	+	return latest
	240	+	}

@@ -0,0 +1,240 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"time"
	5	+
	6	+	purecef "github.com/bnema/purego-cef/cef"
	7	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	8	+
	9	+	"github.com/bnema/dumber/internal/logging"
	10	+	)
	11	+
	12	+	const (
	13	+	renderStallWatchdogInterval = 1 * time.Second
	14	+	renderStallWarnAfter = 3 * time.Second
	15	+	renderStallWarnRepeat = 10 * time.Second
	16	+	renderStallCEFUIBlockedAfter = 3 * time.Second
	17	+	)
	18	+
	19	+	type renderStallClassification struct {
	20	+	Category string
	21	+	CEFUIBlocked bool
	22	+	CEFIOAlive bool
	23	+	}
	24	+
	25	+	type renderStallDiagnostics struct {
	26	+	browser purecef.Browser
	27	+	uri string
	28	+	title string
	29	+	isLoading bool
	30	+	pendingURI string
	31	+	audioPlaying bool
	32	+	diag cef2gtk.Diagnostics
	33	+	lastPaintAge time.Duration
	34	+	latestEvent cef2gtk.DiagnosticEvent
	35	+	}
	36	+
	37	+	func classifyRenderStall(uiHeartbeat, ioHeartbeat cefHeartbeatSnapshot) renderStallClassification {
	38	+	uiBlocked := uiHeartbeat.PostResult == 1 && uiHeartbeat.InFlight && uiHeartbeat.LastAckAge >= renderStallCEFUIBlockedAfter
	39	+	ioAlive := ioHeartbeat.PostResult == 1 && !ioHeartbeat.InFlight && ioHeartbeat.LastAckAge > 0 && ioHeartbeat.LastAckAge < renderStallCEFUIBlockedAfter
	40	+	category := "osr-paint-stalled"
	41	+	if uiBlocked {
	42	+	category = "cef-ui-task-runner-blocked"
	43	+	if ioAlive {
	44	+	category = "cef-ui-task-runner-blocked-io-alive"
	45	+	}
	46	+	}
	47	+	return renderStallClassification{Category: category, CEFUIBlocked: uiBlocked, CEFIOAlive: ioAlive}
	48	+	}
	49	+
	50	+	func (wv *WebView) startRenderStallWatchdog() {
	51	+	if wv == nil \|\| wv.ctx == nil \|\| wv.viewBridge == nil {
	52	+	return
	53	+	}
	54	+
	55	+	wv.renderStallMu.Lock()
	56	+	defer wv.renderStallMu.Unlock()
	57	+	if wv.renderStallStop != nil {
	58	+	return
	59	+	}
	60	+
	61	+	stop := make(chan struct{})
	62	+	done := make(chan struct{})
	63	+	bridge := wv.viewBridge
	64	+	wv.renderStallStop = stop
	65	+	wv.renderStallDone = done
	66	+
	67	+	go wv.renderStallWatchdogLoop(bridge, stop, done)
	68	+	}
	69	+
	70	+	func (wv *WebView) stopRenderStallWatchdog() {
	71	+	if wv == nil {
	72	+	return
	73	+	}
	74	+	wv.renderStallMu.Lock()
	75	+	stop := wv.renderStallStop
	76	+	done := wv.renderStallDone
	77	+	wv.renderStallStop = nil
	78	+	wv.renderStallDone = nil
	79	+	wv.renderStallMu.Unlock()
	80	+
	81	+	if stop == nil \|\| done == nil {
	82	+	return
	83	+	}
	84	+	close(stop)
	85	+	<-done
	86	+	}
	87	+
	88	+	func (wv WebView) renderStallWatchdogLoop(bridge Cef2gtkAdapter, stop <-chan struct{}, done chan<- struct{}) {
	89	+	defer close(done)
	90	+	ticker := time.NewTicker(renderStallWatchdogInterval)
	91	+	defer ticker.Stop()
	92	+
	93	+	var lastWarn time.Time
	94	+	for {
	95	+	select {
	96	+	case <-stop:
	97	+	return
	98	+	case now := <-ticker.C:
	99	+	if wv.maybeLogRenderStall(bridge, now, lastWarn) {
	100	+	lastWarn = now
	101	+	}
	102	+	}
	103	+	}
	104	+	}
	105	+
	106	+	func (wv WebView) maybeLogRenderStall(bridge Cef2gtkAdapter, now, lastWarn time.Time) bool {
	107	+	diag, ok := wv.shouldLogRenderStall(bridge, now, lastWarn)
	108	+	if !ok {
	109	+	return false
	110	+	}
	111	+	wv.logRenderStall(bridge, now, diag)
	112	+	return true
	113	+	}
	114	+
	115	+	func (wv WebView) shouldLogRenderStall(bridge Cef2gtkAdapter, now, lastWarn time.Time) (renderStallDiagnostics, bool) {
	116	+	if wv == nil \|\| bridge == nil \|\| wv.destroyed.Load() \|\| wv.ctx == nil {
	117	+	return renderStallDiagnostics{}, false
	118	+	}
	119	+	diag, ok := wv.collectStallDiagnostics(bridge, now)
	120	+	if !ok {
	121	+	return renderStallDiagnostics{}, false
	122	+	}
	123	+	if diag.lastPaintAge < renderStallWarnAfter {
	124	+	return renderStallDiagnostics{}, false
	125	+	}
	126	+	if !lastWarn.IsZero() && now.Sub(lastWarn) < renderStallWarnRepeat {
	127	+	return renderStallDiagnostics{}, false
	128	+	}
	129	+	return diag, true
	130	+	}
	131	+
	132	+	func (wv WebView) collectStallDiagnostics(bridge Cef2gtkAdapter, now time.Time) (renderStallDiagnostics, bool) {
	133	+	wv.mu.RLock()
	134	+	browser := wv.browser
	135	+	uri := wv.uri
	136	+	title := wv.title
	137	+	isLoading := wv.isLoading
	138	+	pendingURI := wv.pendingURI
	139	+	wv.mu.RUnlock()
	140	+	if browser == nil {
	141	+	return renderStallDiagnostics{}, false
	142	+	}
	143	+
	144	+	audioPlaying := wv.audioPlaying.Load()
	145	+	if !audioPlaying && !isLoading && pendingURI == "" {
	146	+	return renderStallDiagnostics{}, false
	147	+	}
	148	+
	149	+	diag := bridge.Diagnostics()
	150	+	lastPaint := latestDiagnosticEventTime(diag, "accelerated-paint")
	151	+	if lastPaint.IsZero() {
	152	+	return renderStallDiagnostics{}, false
	153	+	}
	154	+	return renderStallDiagnostics{
	155	+	browser: browser,
	156	+	uri: uri,
	157	+	title: title,
	158	+	isLoading: isLoading,
	159	+	pendingURI: pendingURI,
	160	+	audioPlaying: audioPlaying,
	161	+	diag: diag,
	162	+	lastPaintAge: now.Sub(lastPaint),
	163	+	latestEvent: latestDiagnosticEvent(diag),
	164	+	}, true
	165	+	}
	166	+
	167	+	func (wv WebView) logRenderStall(bridge Cef2gtkAdapter, now time.Time, diag renderStallDiagnostics) {
	168	+	uiHeartbeat, ioHeartbeat := wv.cefHeartbeatSnapshots(now)
	169	+	classification := classifyRenderStall(uiHeartbeat, ioHeartbeat)
	170	+	wv.logRenderDiagnosticSnapshot(now, "stall", classification, bridge, diag.diag, diag.lastPaintAge, diag.browser, diag.uri, diag.title, diag.isLoading, diag.pendingURI, diag.audioPlaying)
	171	+	wv.logCEFProcessDiagnostics("stall", classification)
	172	+	if wv.engine != nil {
	173	+	wv.engine.logAllWebViewRenderSnapshots(now, wv.id, "stall-global", classification)
	174	+	}
	175	+	wv.maybeRunRenderStallRecovery(now, bridge, diag.diag.AcceleratedPaints)
	176	+	profile, profileAge, hasProfile := wv.latestCEF2GTKProfileSnapshot(now)
	177	+	logging.FromContext(wv.ctx).Warn().
	178	+	Str("classification", classification.Category).
	179	+	Bool("cef_ui_blocked", classification.CEFUIBlocked).
	180	+	Bool("cef_io_alive", classification.CEFIOAlive).
	181	+	Uint64("webview_id", uint64(wv.id)).
	182	+	Int32("browser_id", diag.browser.GetIdentifier()).
	183	+	Str("uri", logging.TruncateURL(diag.uri, logging.PermissionLogURLMaxLen)).
	184	+	Str("title", diag.title).
	185	+	Bool("is_loading", diag.isLoading).
	186	+	Str("pending_uri", logging.TruncateURL(diag.pendingURI, logging.PermissionLogURLMaxLen)).
	187	+	Bool("audio_playing", diag.audioPlaying).
	188	+	Int64("cef_ui_heartbeat_ack_age_ms", durationMillis(uiHeartbeat.LastAckAge)).
	189	+	Int64("cef_ui_heartbeat_latency_ms", durationMillis(uiHeartbeat.Latency)).
	190	+	Int32("cef_ui_heartbeat_post_result", uiHeartbeat.PostResult).
	191	+	Bool("cef_ui_heartbeat_in_flight", uiHeartbeat.InFlight).
	192	+	Int64("cef_io_heartbeat_ack_age_ms", durationMillis(ioHeartbeat.LastAckAge)).
	193	+	Int64("cef_io_heartbeat_latency_ms", durationMillis(ioHeartbeat.Latency)).
	194	+	Int32("cef_io_heartbeat_post_result", ioHeartbeat.PostResult).
	195	+	Bool("cef_io_heartbeat_in_flight", ioHeartbeat.InFlight).
	196	+	Uint64("audio_packets", wv.audioPacketCount.Load()).
	197	+	Uint64("audio_writes", wv.audioWriteCount.Load()).
	198	+	Int64("last_accelerated_paint_age_ms", diag.lastPaintAge.Milliseconds()).
	199	+	Bool("profile_snapshot_available", hasProfile).
	200	+	Int64("profile_snapshot_age_ms", durationMillis(profileAge)).
	201	+	Uint64("profile_frames_received", profile.FramesReceived).
	202	+	Uint64("profile_frames_queued", profile.FramesQueued).
	203	+	Uint64("profile_frames_rendered", profile.FramesRendered).
	204	+	Uint32("profile_gc_delta", profile.GC.NumGCDelta).
	205	+	Int("accelerated_paints", diag.diag.AcceleratedPaints).
	206	+	Int("unsupported_paints", diag.diag.UnsupportedPaints).
	207	+	Int("accelerated_paint_errors", diag.diag.AcceleratedPaintErrors).
	208	+	Int("import_failures", diag.diag.ImportFailures).
	209	+	Int("render_failures", diag.diag.RenderFailures).
	210	+	Str("latest_render_event_kind", diag.latestEvent.Kind).
	211	+	Str("latest_render_event_message", diag.latestEvent.Message).
	212	+	Msg("cef: accelerated rendering appears stalled")
	213	+	}
	214	+
	215	+	func latestDiagnosticEventTime(diag cef2gtk.Diagnostics, kind string) time.Time {
	216	+	return latestDiagnosticEventOfKind(diag, kind).Time
	217	+	}
	218	+
	219	+	func latestDiagnosticEventOfKind(diag cef2gtk.Diagnostics, kind string) cef2gtk.DiagnosticEvent {
	220	+	var latest cef2gtk.DiagnosticEvent
	221	+	for _, event := range diag.Events {
	222	+	if event.Kind != kind {
	223	+	continue
	224	+	}
	225	+	if latest.Time.IsZero() \|\| event.Time.After(latest.Time) {
	226	+	latest = event
	227	+	}
	228	+	}
	229	+	return latest
	230	+	}
	231	+
	232	+	func latestDiagnosticEvent(diag cef2gtk.Diagnostics) cef2gtk.DiagnosticEvent {
	233	+	var latest cef2gtk.DiagnosticEvent
	234	+	for _, event := range diag.Events {
	235	+	if latest.Time.IsZero() \|\| event.Time.After(latest.Time) {
	236	+	latest = event
	237	+	}
	238	+	}
	239	+	return latest
	240	+	}

A internal/infrastructure/cef/render_stall_watchdog_test.go +81 -0

@@ -0,0 +1,81 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"testing"
	6	+	"time"
	7	+
	8	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	9	+	)
	10	+
	11	+	func TestRenderStallWatchdogStartStopIdempotent(t *testing.T) {
	12	+	wv := &WebView{ctx: context.Background(), viewBridge: &Cef2gtkAdapter{}}
	13	+
	14	+	wv.startRenderStallWatchdog()
	15	+	firstStop := wv.renderStallStop
	16	+	firstDone := wv.renderStallDone
	17	+	if firstStop == nil \|\| firstDone == nil {
	18	+	t.Fatal("startRenderStallWatchdog did not initialize stop/done channels")
	19	+	}
	20	+
	21	+	wv.startRenderStallWatchdog()
	22	+	if wv.renderStallStop != firstStop \|\| wv.renderStallDone != firstDone {
	23	+	t.Fatal("second start should not replace active watchdog channels")
	24	+	}
	25	+
	26	+	wv.stopRenderStallWatchdog()
	27	+	if wv.renderStallStop != nil \|\| wv.renderStallDone != nil {
	28	+	t.Fatal("stopRenderStallWatchdog should clear watchdog channels")
	29	+	}
	30	+
	31	+	// A second stop should be a no-op, not a double close panic.
	32	+	wv.stopRenderStallWatchdog()
	33	+	}
	34	+
	35	+	func TestClassifyRenderStallDetectsCEFUIBlockedWithIOAlive(t *testing.T) {
	36	+	classification := classifyRenderStall(
	37	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: true, LastAckAge: 5 * time.Second},
	38	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	39	+	)
	40	+	if classification.Category != "cef-ui-task-runner-blocked-io-alive" {
	41	+	t.Fatalf("category = %q", classification.Category)
	42	+	}
	43	+	if !classification.CEFUIBlocked {
	44	+	t.Fatal("CEF UI should be classified as blocked")
	45	+	}
	46	+	if !classification.CEFIOAlive {
	47	+	t.Fatal("CEF IO should be classified as alive")
	48	+	}
	49	+	}
	50	+
	51	+	func TestClassifyRenderStallKeepsOSRCategoryWhenUIHeartbeatHealthy(t *testing.T) {
	52	+	classification := classifyRenderStall(
	53	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	54	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	55	+	)
	56	+	if classification.Category != "osr-paint-stalled" {
	57	+	t.Fatalf("category = %q", classification.Category)
	58	+	}
	59	+	if classification.CEFUIBlocked {
	60	+	t.Fatal("CEF UI should not be classified as blocked")
	61	+	}
	62	+	}
	63	+
	64	+	func TestLatestDiagnosticEventHelpers(t *testing.T) {
	65	+	now := time.Now()
	66	+	diag := cef2gtk.Diagnostics{Events: []cef2gtk.DiagnosticEvent{
	67	+	{Time: now.Add(-3 * time.Second), Kind: "accelerated-paint"},
	68	+	{Time: now.Add(-2 * time.Second), Kind: "render-failure", Message: "old"},
	69	+	{Time: now.Add(-1 * time.Second), Kind: "render-failure", Message: "new"},
	70	+	}}
	71	+
	72	+	if got := latestDiagnosticEventOfKind(diag, "render-failure"); got.Message != "new" {
	73	+	t.Fatalf("latest render-failure message = %q, want new", got.Message)
	74	+	}
	75	+	if got := latestDiagnosticEvent(diag); got.Kind != "render-failure" \|\| got.Message != "new" {
	76	+	t.Fatalf("latest event = (%q, %q), want (render-failure, new)", got.Kind, got.Message)
	77	+	}
	78	+	if got := latestDiagnosticEventTime(diag, "accelerated-paint"); !got.Equal(now.Add(-3 * time.Second)) {
	79	+	t.Fatalf("latest accelerated paint time = %v, want %v", got, now.Add(-3*time.Second))
	80	+	}
	81	+	}

@@ -0,0 +1,81 @@
	1	+	package cef
	2	+
	3	+	import (
	4	+	"context"
	5	+	"testing"
	6	+	"time"
	7	+
	8	+	cef2gtk "github.com/bnema/purego-cef2gtk"
	9	+	)
	10	+
	11	+	func TestRenderStallWatchdogStartStopIdempotent(t *testing.T) {
	12	+	wv := &WebView{ctx: context.Background(), viewBridge: &Cef2gtkAdapter{}}
	13	+
	14	+	wv.startRenderStallWatchdog()
	15	+	firstStop := wv.renderStallStop
	16	+	firstDone := wv.renderStallDone
	17	+	if firstStop == nil \|\| firstDone == nil {
	18	+	t.Fatal("startRenderStallWatchdog did not initialize stop/done channels")
	19	+	}
	20	+
	21	+	wv.startRenderStallWatchdog()
	22	+	if wv.renderStallStop != firstStop \|\| wv.renderStallDone != firstDone {
	23	+	t.Fatal("second start should not replace active watchdog channels")
	24	+	}
	25	+
	26	+	wv.stopRenderStallWatchdog()
	27	+	if wv.renderStallStop != nil \|\| wv.renderStallDone != nil {
	28	+	t.Fatal("stopRenderStallWatchdog should clear watchdog channels")
	29	+	}
	30	+
	31	+	// A second stop should be a no-op, not a double close panic.
	32	+	wv.stopRenderStallWatchdog()
	33	+	}
	34	+
	35	+	func TestClassifyRenderStallDetectsCEFUIBlockedWithIOAlive(t *testing.T) {
	36	+	classification := classifyRenderStall(
	37	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: true, LastAckAge: 5 * time.Second},
	38	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	39	+	)
	40	+	if classification.Category != "cef-ui-task-runner-blocked-io-alive" {
	41	+	t.Fatalf("category = %q", classification.Category)
	42	+	}
	43	+	if !classification.CEFUIBlocked {
	44	+	t.Fatal("CEF UI should be classified as blocked")
	45	+	}
	46	+	if !classification.CEFIOAlive {
	47	+	t.Fatal("CEF IO should be classified as alive")
	48	+	}
	49	+	}
	50	+
	51	+	func TestClassifyRenderStallKeepsOSRCategoryWhenUIHeartbeatHealthy(t *testing.T) {
	52	+	classification := classifyRenderStall(
	53	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	54	+	cefHeartbeatSnapshot{PostResult: 1, InFlight: false, LastAckAge: 100 * time.Millisecond},
	55	+	)
	56	+	if classification.Category != "osr-paint-stalled" {
	57	+	t.Fatalf("category = %q", classification.Category)
	58	+	}
	59	+	if classification.CEFUIBlocked {
	60	+	t.Fatal("CEF UI should not be classified as blocked")
	61	+	}
	62	+	}
	63	+
	64	+	func TestLatestDiagnosticEventHelpers(t *testing.T) {
	65	+	now := time.Now()
	66	+	diag := cef2gtk.Diagnostics{Events: []cef2gtk.DiagnosticEvent{
	67	+	{Time: now.Add(-3 * time.Second), Kind: "accelerated-paint"},
	68	+	{Time: now.Add(-2 * time.Second), Kind: "render-failure", Message: "old"},
	69	+	{Time: now.Add(-1 * time.Second), Kind: "render-failure", Message: "new"},
	70	+	}}
	71	+
	72	+	if got := latestDiagnosticEventOfKind(diag, "render-failure"); got.Message != "new" {
	73	+	t.Fatalf("latest render-failure message = %q, want new", got.Message)
	74	+	}
	75	+	if got := latestDiagnosticEvent(diag); got.Kind != "render-failure" \|\| got.Message != "new" {
	76	+	t.Fatalf("latest event = (%q, %q), want (render-failure, new)", got.Kind, got.Message)
	77	+	}
	78	+	if got := latestDiagnosticEventTime(diag, "accelerated-paint"); !got.Equal(now.Add(-3 * time.Second)) {
	79	+	t.Fatalf("latest accelerated paint time = %v, want %v", got, now.Add(-3*time.Second))
	80	+	}
	81	+	}

M internal/infrastructure/cef/webview.go +46 -19


@@ -14,6 +14,7 @@ import (
14	14		"time"
15	15
16	16		purecef "github.com/bnema/purego-cef/cef"
	17	+	cef2gtk "github.com/bnema/purego-cef2gtk"
17	18		"github.com/bnema/puregotk/v4/glib"
18	19		"github.com/bnema/puregotk/v4/gtk"
19	20

@@ -68,15 +69,24 @@ var (
68	69		// driven through purego-cef2gtk. Dumber owns browser state and callbacks; the
69	70		// bridge owns GTK rendering and input forwarding.
70	71		type WebView struct {
71		-	id port.WebViewID
72		-	ctx context.Context
73		-	engine *Engine
74		-	browser purecef.Browser
75		-	host purecef.BrowserHost
76		-	client purecef.RawClient // prevent GC from collecting the client before CEF AddRef's it
77		-	viewBridge *Cef2gtkAdapter
78		-	handlers *handlerSet
79		-	findCtrl *cefFindController
	72	+	id port.WebViewID
	73	+	ctx context.Context
	74	+	engine *Engine
	75	+	browser purecef.Browser
	76	+	host purecef.BrowserHost
	77	+	client purecef.RawClient // prevent GC from collecting the client before CEF AddRef's it
	78	+	viewBridge *Cef2gtkAdapter
	79	+	handlers *handlerSet
	80	+	findCtrl *cefFindController
	81	+	profileCleanup func()
	82	+	profileMu sync.Mutex
	83	+	renderStallMu sync.Mutex
	84	+	renderStallStop chan struct{}
	85	+	renderStallDone chan struct{}
	86	+	renderStallRecoveryLastAt time.Time
	87	+	latestProfileSnapshot cef2gtk.ProfileSnapshot
	88	+	previousProfileSnapshot cef2gtk.ProfileSnapshot
	89	+	latestProfileSnapshotAt time.Time
80	90
81	91		removeSizeObserver func()
82	92

@@ -137,6 +147,7 @@ type WebView struct {
137	147		isLoading bool
138	148		selectedText string
139	149		focusedEditable bool
	150	+	inputAttached bool
140	151		bridgeNonce string
141	152		selectionDebounceTimer stoppableTimer
142	153		selectionDebounceSeq uint64

@@ -513,9 +524,9 @@ func (wv *WebView) SetOnReadyToShow(fn func()) {
513	524		}
514	525		wv.mu.Lock()
515	526		wv.popupReadyToShow = fn
516		-	alreadyReady := wv.browser != nil && !wv.popupReadyShown && fn != nil
	527	+	shouldTryReady := wv.browser != nil && fn != nil
517	528		wv.mu.Unlock()
518		-	if alreadyReady {
	529	+	if shouldTryReady {
519	530		wv.fireReadyToShow()
520	531		}
521	532		}

@@ -596,7 +607,7 @@ func (wv *WebView) fireReadyToShow() {
596	607		return
597	608		}
598	609		wv.mu.Lock()
599		-	if wv.popupReadyShown \|\| wv.popupReadyToShow == nil {
	610	+	if wv.popupReadyShown \|\| wv.popupReadyToShow == nil \|\| !wv.inputAttached {
600	611		wv.mu.Unlock()
601	612		return
602	613		}

@@ -606,6 +617,16 @@ func (wv *WebView) fireReadyToShow() {
606	617		wv.runOnGTK(fn)
607	618		}
608	619
	620	+	func (wv *WebView) markInputAttached() {
	621	+	if wv == nil \|\| wv.destroyed.Load() {
	622	+	return
	623	+	}
	624	+	wv.mu.Lock()
	625	+	wv.inputAttached = true
	626	+	wv.mu.Unlock()
	627	+	wv.fireReadyToShow()
	628	+	}
	629	+
609	630		func (wv WebView) markNativePopupCandidate(parent WebView) {
610	631		if wv == nil {
611	632		return

@@ -1000,6 +1021,7 @@ func (wv *WebView) Destroy() {
1000	1021		wv.openerMessageCallbacks = nil
1001	1022		wv.openerNavigationCallbacks = nil
1002	1023		wv.popupReadyToShow = nil
	1024	+	wv.inputAttached = false
1003	1025		wv.pendingNativePopups = nil
1004	1026		wv.nativePopupParent = nil
1005	1027		wv.nativePopupCandidate = false

@@ -1009,6 +1031,7 @@ func (wv *WebView) Destroy() {
1009	1031		wv.popupOpenerBridgeParentURI = ""
1010	1032		wv.mu.Unlock()
1011	1033		wv.stopNativePopupFallbackTimer()
	1034	+	wv.stopRenderStallWatchdog()
1012	1035		wv.cancelSelectionDebounce()
1013	1036		wv.closeAudioStream()
1014	1037		wv.scheduleStopBeginFrameLoop()

@@ -1030,13 +1053,17 @@ func (wv *WebView) Destroy() {
1030	1053		_ = bridge.Destroy()
1031	1054		})
1032	1055		}
	1056	+	if wv.profileCleanup != nil {
	1057	+	wv.profileCleanup()
	1058	+	wv.profileCleanup = nil
	1059	+	}
1033	1060		}
1034	1061
1035	1062		// ---------------------------------------------------------------------------
1036	1063		// NativeWidgetProvider
1037	1064		// ---------------------------------------------------------------------------
1038	1065
1039		-	// NativeWidget returns the uintptr for embedding the bridge GtkGLArea into GTK.
	1066	+	// NativeWidget returns the uintptr for embedding the bridge GTK widget.
1040	1067		func (wv *WebView) NativeWidget() uintptr {
1041	1068		if wv.viewBridge == nil {
1042	1069		return 0

@@ -1563,7 +1590,7 @@ func (wv *WebView) scheduleStopBeginFrameLoop() {
1563	1590		}
1564	1591
1565	1592		func (wv *WebView) startBeginFrameLoop() {
1566		-	if wv.destroyed.Load() \|\| wv.viewBridge == nil \|\| wv.viewBridge.GLArea() == nil {
	1593	+	if wv.destroyed.Load() \|\| wv.viewBridge == nil \|\| wv.viewBridge.Widget() == nil {
1567	1594		return
1568	1595		}
1569	1596

@@ -1573,7 +1600,7 @@ func (wv *WebView) startBeginFrameLoop() {
1573	1600		return
1574	1601		}
1575	1602
1576		-	glArea := wv.viewBridge.GLArea()
	1603	+	widget := wv.viewBridge.Widget()
1577	1604		cb := new(gtk.TickCallback)
1578	1605		*cb = func(_, _, _ uintptr) bool {
1579	1606		if wv.destroyed.Load() {

@@ -1589,7 +1616,7 @@ func (wv *WebView) startBeginFrameLoop() {
1589	1616		return true
1590	1617		}
1591	1618		wv.beginFrameTick = cb
1592		-	wv.beginFrameTickID = glArea.AddTickCallback(cb, 0, nil)
	1619	+	wv.beginFrameTickID = widget.AddTickCallback(cb, 0, nil)
1593	1620		host := wv.host
1594	1621		wv.mu.Unlock()
1595	1622

@@ -1599,7 +1626,7 @@ func (wv *WebView) startBeginFrameLoop() {
1599	1626		}
1600	1627
1601	1628		func (wv *WebView) stopBeginFrameLoop() {
1602		-	if wv.viewBridge == nil \|\| wv.viewBridge.GLArea() == nil {
	1629	+	if wv.viewBridge == nil \|\| wv.viewBridge.Widget() == nil {
1603	1630		return
1604	1631		}
1605	1632

@@ -1607,11 +1634,11 @@ func (wv *WebView) stopBeginFrameLoop() {
1607	1634		tickID := wv.beginFrameTickID
1608	1635		wv.beginFrameTickID = 0
1609	1636		wv.beginFrameTick = nil
1610		-	glArea := wv.viewBridge.GLArea()
	1637	+	widget := wv.viewBridge.Widget()
1611	1638		wv.mu.Unlock()
1612	1639
1613	1640		if tickID != 0 {
1614		-	glArea.RemoveTickCallback(tickID)
	1641	+	widget.RemoveTickCallback(tickID)
1615	1642		}
1616	1643		}
1617	1644

 	"time"
 	purecef "github.com/bnema/purego-cef/cef"
+	cef2gtk "github.com/bnema/purego-cef2gtk"
 	"github.com/bnema/puregotk/v4/glib"
 	"github.com/bnema/puregotk/v4/gtk"
 // driven through purego-cef2gtk. Dumber owns browser state and callbacks; the
 // bridge owns GTK rendering and input forwarding.
 type WebView struct {
-	id         port.WebViewID
+	id                        port.WebViewID
-	ctx        context.Context
+	ctx                       context.Context
-	engine     *Engine
+	engine                    *Engine
-	browser    purecef.Browser
+	browser                   purecef.Browser
-	host       purecef.BrowserHost
+	host                      purecef.BrowserHost
-	client     purecef.RawClient // prevent GC from collecting the client before CEF AddRef's it
+	client                    purecef.RawClient // prevent GC from collecting the client before CEF AddRef's it
-	viewBridge *Cef2gtkAdapter
+	viewBridge                *Cef2gtkAdapter
-	handlers   *handlerSet
+	handlers                  *handlerSet
-	findCtrl   *cefFindController
+	findCtrl                  *cefFindController
+	profileCleanup            func()
+	profileMu                 sync.Mutex
+	renderStallMu             sync.Mutex
+	renderStallStop           chan struct{}
+	renderStallDone           chan struct{}
+	renderStallRecoveryLastAt time.Time
+	latestProfileSnapshot     cef2gtk.ProfileSnapshot
+	previousProfileSnapshot   cef2gtk.ProfileSnapshot
+	latestProfileSnapshotAt   time.Time
 	removeSizeObserver func()
 	isLoading                 bool
 	selectedText              string
 	focusedEditable           bool
+	inputAttached             bool
 	bridgeNonce               string
 	selectionDebounceTimer    stoppableTimer
 	selectionDebounceSeq      uint64
 	}
 	wv.mu.Lock()
 	wv.popupReadyToShow = fn
-	alreadyReady := wv.browser != nil && !wv.popupReadyShown && fn != nil
+	shouldTryReady := wv.browser != nil && fn != nil
 	wv.mu.Unlock()
-	if alreadyReady {
+	if shouldTryReady {
 		wv.fireReadyToShow()
 	}
 }
 		return
 	}
 	wv.mu.Lock()
-	if wv.popupReadyShown || wv.popupReadyToShow == nil {
+	if wv.popupReadyShown || wv.popupReadyToShow == nil || !wv.inputAttached {
 		wv.mu.Unlock()
 		return
 	}
 	wv.runOnGTK(fn)
 }
+func (wv *WebView) markInputAttached() {
+	if wv == nil || wv.destroyed.Load() {
+		return
+	}
+	wv.mu.Lock()
+	wv.inputAttached = true
+	wv.mu.Unlock()
+	wv.fireReadyToShow()
+}
 func (wv *WebView) markNativePopupCandidate(parent *WebView) {
 	if wv == nil {
 		return
 	wv.openerMessageCallbacks = nil
 	wv.openerNavigationCallbacks = nil
 	wv.popupReadyToShow = nil
+	wv.inputAttached = false
 	wv.pendingNativePopups = nil
 	wv.nativePopupParent = nil
 	wv.nativePopupCandidate = false
 	wv.popupOpenerBridgeParentURI = ""
 	wv.mu.Unlock()
 	wv.stopNativePopupFallbackTimer()
+	wv.stopRenderStallWatchdog()
 	wv.cancelSelectionDebounce()
 	wv.closeAudioStream()
 	wv.scheduleStopBeginFrameLoop()
 			_ = bridge.Destroy()
 		})
 	}
+	if wv.profileCleanup != nil {
+		wv.profileCleanup()
+		wv.profileCleanup = nil
+	}
 }
 // ---------------------------------------------------------------------------
 // NativeWidgetProvider
 // ---------------------------------------------------------------------------
-// NativeWidget returns the uintptr for embedding the bridge GtkGLArea into GTK.
+// NativeWidget returns the uintptr for embedding the bridge GTK widget.
 func (wv *WebView) NativeWidget() uintptr {
 	if wv.viewBridge == nil {
 		return 0
 }
 func (wv *WebView) startBeginFrameLoop() {
-	if wv.destroyed.Load() || wv.viewBridge == nil || wv.viewBridge.GLArea() == nil {
+	if wv.destroyed.Load() || wv.viewBridge == nil || wv.viewBridge.Widget() == nil {
 		return
 	}
 		return
 	}
-	glArea := wv.viewBridge.GLArea()
+	widget := wv.viewBridge.Widget()
 	cb := new(gtk.TickCallback)
 	*cb = func(_, _, _ uintptr) bool {
 		if wv.destroyed.Load() {
 		return true
 	}
 	wv.beginFrameTick = cb
-	wv.beginFrameTickID = glArea.AddTickCallback(cb, 0, nil)
+	wv.beginFrameTickID = widget.AddTickCallback(cb, 0, nil)
 	host := wv.host
 	wv.mu.Unlock()
 }
 func (wv *WebView) stopBeginFrameLoop() {
-	if wv.viewBridge == nil || wv.viewBridge.GLArea() == nil {
+	if wv.viewBridge == nil || wv.viewBridge.Widget() == nil {
 		return
 	}
 	tickID := wv.beginFrameTickID
 	wv.beginFrameTickID = 0
 	wv.beginFrameTick = nil
-	glArea := wv.viewBridge.GLArea()
+	widget := wv.viewBridge.Widget()
 	wv.mu.Unlock()
 	if tickID != 0 {
-		glArea.RemoveTickCallback(tickID)
+		widget.RemoveTickCallback(tickID)
 	}
 }

M internal/infrastructure/cef/webview_handlers.go +32 -17


@@ -2,6 +2,7 @@ package cef
2	2
3	3		import (
4	4		"context"
	5	+	"errors"
5	6		"strings"
6	7
7	8		purecef "github.com/bnema/purego-cef/cef"

@@ -531,6 +532,9 @@ func (h *handlerSet) attachAfterCreatedBrowser(
531	532		h.wv.browser = browser
532	533		h.wv.host = host
533	534		h.wv.pendingCreate = nil
	535	+	bridge := h.wv.viewBridge
	536	+	h.wv.inputAttached = bridge == nil
	537	+	state.inputAttached = h.wv.inputAttached
534	538		if h.wv.findCtrl != nil {
535	539		h.wv.findCtrl.setHost(host)
536	540		}

@@ -542,10 +546,11 @@ func (h *handlerSet) attachAfterCreatedBrowser(
542	546		state.hasPendingNavigation = strings.TrimSpace(h.wv.pendingURI) != ""
543	547		h.wv.mu.Unlock()
544	548
545		-	if h.wv.viewBridge != nil {
	549	+	if bridge != nil {
546	550		wv := h.wv
547	551		wv.runOnGTK(func() {
548		-	if wv.viewBridge == nil {
	552	+	if wv.destroyed.Load() \|\| wv.viewBridge == nil {
	553	+	wv.handleInputAttachFailure(ErrAdapterDestroyed, host)
549	554		return
550	555		}
551	556		if err := wv.viewBridge.AttachInput(host, cef2gtk.InputOptions{

@@ -559,28 +564,39 @@ func (h *handlerSet) attachAfterCreatedBrowser(
559	564		wv.engine.handleExplicitClipboardBridgeText(wv.id, action, text)
560	565		}
561	566		},
562		-	}); err != nil && wv.ctx != nil {
563		-	logging.FromContext(wv.ctx).Warn().Err(err).Msg("cef: failed to attach input to cef2gtk bridge")
	567	+	}); err != nil {
	568	+	wv.handleInputAttachFailure(err, host)
	569	+	return
564	570		}
	571	+	if wv.viewBridge != nil && wv.viewBridge.HasFocus() {
	572	+	syncWindowlessBrowserFocus(host)
	573	+	} else {
	574	+	host.Invalidate(purecef.PaintElementTypePetView)
	575	+	}
	576	+	wv.markInputAttached()
565	577		})
566	578		}
567	579
568	580		// Mark browser as visible — CEF OSR starts in hidden state and suppresses
569	581		// painting/caret updates until explicitly told the browser is shown.
570	582		host.WasHidden(0)
571		-	state.shouldSyncFocus = h.afterCreatedShouldSyncFocus()
572	583		return state
573	584		}
574	585
575		-	func (h *handlerSet) afterCreatedShouldSyncFocus() bool {
576		-	if h == nil \|\| h.wv == nil \|\| h.wv.viewBridge == nil {
577		-	return false
	586	+	func (wv *WebView) handleInputAttachFailure(err error, host purecef.BrowserHost) {
	587	+	if wv == nil \|\| err == nil {
	588	+	return
	589	+	}
	590	+	if wv.ctx != nil {
	591	+	logging.FromContext(wv.ctx).Warn().Err(err).Msg("cef: failed to attach input to cef2gtk bridge")
	592	+	}
	593	+	if errors.Is(err, ErrAdapterDestroyed) {
	594	+	if host != nil && !wv.destroyed.Load() {
	595	+	host.CloseBrowser(1)
	596	+	return
	597	+	}
	598	+	wv.runCloseCallbacks()
578	599		}
579		-	focused := false
580		-	h.wv.runOnGTKSync(func() {
581		-	focused = h.wv.viewBridge != nil && h.wv.viewBridge.HasFocus()
582		-	})
583		-	return focused
584	600		}
585	601
586	602		func (h *handlerSet) finishAfterCreated(

@@ -594,9 +610,7 @@ func (h *handlerSet) finishAfterCreated(
594	610		h.wv.engine.bindBrowserWebView(browser, h.wv)
595	611		}
596	612		h.wv.stopNativePopupFallbackTimer()
597		-	if state.shouldSyncFocus {
598		-	syncWindowlessBrowserFocus(host)
599		-	} else {
	613	+	if state.inputAttached {
600	614		// Request an initial OSR frame even before the first real navigation
601	615		// commits. This restores the about:blank warm-up paint that the stable
602	616		// startup path relied on and prevents the rendering bridge from staying idle.

@@ -613,7 +627,7 @@ func (h *handlerSet) finishAfterCreated(
613	627		}
614	628
615	629		type afterCreatedState struct {
616		-	shouldSyncFocus bool
	630	+	inputAttached bool
617	631		hasPendingNavigation bool
618	632		nativePopupParent *WebView
619	633		nativePopupID int32

@@ -638,6 +652,7 @@ func (h *handlerSet) OnBeforeClose(browser purecef.Browser) {
638	652		h.wv.mu.Lock()
639	653		h.wv.browser = nil
640	654		h.wv.host = nil
	655	+	h.wv.inputAttached = false
641	656		if h.wv.findCtrl != nil {
642	657		h.wv.findCtrl.setHost(nil)
643	658		}

 import (
 	"context"
+	"errors"
 	"strings"
 	purecef "github.com/bnema/purego-cef/cef"
 	h.wv.browser = browser
 	h.wv.host = host
 	h.wv.pendingCreate = nil
+	bridge := h.wv.viewBridge
+	h.wv.inputAttached = bridge == nil
+	state.inputAttached = h.wv.inputAttached
 	if h.wv.findCtrl != nil {
 		h.wv.findCtrl.setHost(host)
 	}
 	state.hasPendingNavigation = strings.TrimSpace(h.wv.pendingURI) != ""
 	h.wv.mu.Unlock()
-	if h.wv.viewBridge != nil {
+	if bridge != nil {
 		wv := h.wv
 		wv.runOnGTK(func() {
-			if wv.viewBridge == nil {
+			if wv.destroyed.Load() || wv.viewBridge == nil {
+				wv.handleInputAttachFailure(ErrAdapterDestroyed, host)
 				return
 			}
 			if err := wv.viewBridge.AttachInput(host, cef2gtk.InputOptions{
 						wv.engine.handleExplicitClipboardBridgeText(wv.id, action, text)
 					}
 				},
-			}); err != nil && wv.ctx != nil {
+			}); err != nil {
-				logging.FromContext(wv.ctx).Warn().Err(err).Msg("cef: failed to attach input to cef2gtk bridge")
+				wv.handleInputAttachFailure(err, host)
+				return
 			}
+			if wv.viewBridge != nil && wv.viewBridge.HasFocus() {
+				syncWindowlessBrowserFocus(host)
+			} else {
+				host.Invalidate(purecef.PaintElementTypePetView)
+			}
+			wv.markInputAttached()
 		})
 	}
 	// Mark browser as visible — CEF OSR starts in hidden state and suppresses
 	// painting/caret updates until explicitly told the browser is shown.
 	host.WasHidden(0)
-	state.shouldSyncFocus = h.afterCreatedShouldSyncFocus()
 	return state
 }
-func (h *handlerSet) afterCreatedShouldSyncFocus() bool {
+func (wv *WebView) handleInputAttachFailure(err error, host purecef.BrowserHost) {
-	if h == nil || h.wv == nil || h.wv.viewBridge == nil {
+	if wv == nil || err == nil {
-		return false
+		return
+	}
+	if wv.ctx != nil {
+		logging.FromContext(wv.ctx).Warn().Err(err).Msg("cef: failed to attach input to cef2gtk bridge")
+	}
+	if errors.Is(err, ErrAdapterDestroyed) {
+		if host != nil && !wv.destroyed.Load() {
+			host.CloseBrowser(1)
+			return
+		}
+		wv.runCloseCallbacks()
 	}
-	focused := false
-	h.wv.runOnGTKSync(func() {
-		focused = h.wv.viewBridge != nil && h.wv.viewBridge.HasFocus()
-	})
-	return focused
 }
 func (h *handlerSet) finishAfterCreated(
 		h.wv.engine.bindBrowserWebView(browser, h.wv)
 	}
 	h.wv.stopNativePopupFallbackTimer()
-	if state.shouldSyncFocus {
+	if state.inputAttached {
-		syncWindowlessBrowserFocus(host)
-	} else {
 		// Request an initial OSR frame even before the first real navigation
 		// commits. This restores the about:blank warm-up paint that the stable
 		// startup path relied on and prevents the rendering bridge from staying idle.
 }
 type afterCreatedState struct {
-	shouldSyncFocus      bool
+	inputAttached        bool
 	hasPendingNavigation bool
 	nativePopupParent    *WebView
 	nativePopupID        int32
 	h.wv.mu.Lock()
 	h.wv.browser = nil
 	h.wv.host = nil
+	h.wv.inputAttached = false
 	if h.wv.findCtrl != nil {
 		h.wv.findCtrl.setHost(nil)
 	}

M internal/logging/session.go +26 -0

@@ -1,6 +1,7 @@
1	1		package logging
2	2
3	3		import (
	4	+	"context"
4	5		"crypto/rand"
5	6		"encoding/hex"
6	7		"errors"

@@ -55,6 +56,31 @@ func SessionFilename(sessionID string) string {
55	56		return "session_" + sessionID + ".log"
56	57		}
57	58
	59	+	type sessionMetadataKey struct{}
	60	+
	61	+	// SessionMetadata describes the active browser session log identity carried by context.
	62	+	type SessionMetadata struct {
	63	+	ID string
	64	+	LogPath string
	65	+	}
	66	+
	67	+	// WithSessionMetadata attaches active session metadata to ctx.
	68	+	func WithSessionMetadata(ctx context.Context, id, logPath string) context.Context {
	69	+	if ctx == nil {
	70	+	ctx = context.Background()
	71	+	}
	72	+	return context.WithValue(ctx, sessionMetadataKey{}, SessionMetadata{ID: id, LogPath: logPath})
	73	+	}
	74	+
	75	+	// SessionMetadataFromContext returns active session metadata from ctx, if present.
	76	+	func SessionMetadataFromContext(ctx context.Context) (SessionMetadata, bool) {
	77	+	if ctx == nil {
	78	+	return SessionMetadata{}, false
	79	+	}
	80	+	metadata, ok := ctx.Value(sessionMetadataKey{}).(SessionMetadata)
	81	+	return metadata, ok
	82	+	}
	83	+
58	84		type sessionLogFile struct {
59	85		path string
60	86		filename string

@@ -1,6 +1,7 @@
1	package logging	1		package logging
2		2
3	import (	3		import (
		4	+	"context"
4	"crypto/rand"	5		"crypto/rand"
5	"encoding/hex"	6		"encoding/hex"
6	"errors"	7		"errors"

@@ -55,6 +56,31 @@ func SessionFilename(sessionID string) string {
55	return "session_" + sessionID + ".log"	56		return "session_" + sessionID + ".log"
56	}	57		}
57		58
		59	+	type sessionMetadataKey struct{}
		60	+
		61	+	// SessionMetadata describes the active browser session log identity carried by context.
		62	+	type SessionMetadata struct {
		63	+	ID string
		64	+	LogPath string
		65	+	}
		66	+
		67	+	// WithSessionMetadata attaches active session metadata to ctx.
		68	+	func WithSessionMetadata(ctx context.Context, id, logPath string) context.Context {
		69	+	if ctx == nil {
		70	+	ctx = context.Background()
		71	+	}
		72	+	return context.WithValue(ctx, sessionMetadataKey{}, SessionMetadata{ID: id, LogPath: logPath})
		73	+	}
		74	+
		75	+	// SessionMetadataFromContext returns active session metadata from ctx, if present.
		76	+	func SessionMetadataFromContext(ctx context.Context) (SessionMetadata, bool) {
		77	+	if ctx == nil {
		78	+	return SessionMetadata{}, false
		79	+	}
		80	+	metadata, ok := ctx.Value(sessionMetadataKey{}).(SessionMetadata)
		81	+	return metadata, ok
		82	+	}
		83	+
58	type sessionLogFile struct {	84		type sessionLogFile struct {
59	path string	85		path string
60	filename string	86		filename string

M internal/ui/input/global_shortcuts.go +2 -0


@@ -371,6 +371,8 @@ func (h *GlobalShortcutHandler) suppressRepeatedShortcut(action Action, now time
371	371		return false
372	372		}
373	373		if h.lastDispatchAt == nil {
	374	+	// Detached/reloading handlers clear dispatch state; consume one-shot shortcuts
	375	+	// rather than letting a stale GTK callback repeat destructive actions.
374	376		return true
375	377		}
376	378		if last, ok := h.lastDispatchAt[action]; ok && now.Sub(last) < globalShortcutRepeatSuppressWindow {


@@ -371,6 +371,8 @@ func (h *GlobalShortcutHandler) suppressRepeatedShortcut(action Action, now time
371	return false	371		return false
372	}	372		}
373	if h.lastDispatchAt == nil {	373		if h.lastDispatchAt == nil {
		374	+	// Detached/reloading handlers clear dispatch state; consume one-shot shortcuts
		375	+	// rather than letting a stale GTK callback repeat destructive actions.
374	return true	376		return true
375	}	377		}
376	if last, ok := h.lastDispatchAt[action]; ok && now.Sub(last) < globalShortcutRepeatSuppressWindow {	378		if last, ok := h.lastDispatchAt[action]; ok && now.Sub(last) < globalShortcutRepeatSuppressWindow {

M internal/ui/input/global_shortcuts_test.go +9 -1


@@ -33,7 +33,15 @@ func TestGlobalShortcutHandlerAllowsRepeatingNavigationActions(t *testing.T) {
33	33		}
34	34
35	35		func TestGlobalShortcutHandlerSuppressesOneShotActionsAfterDetach(t *testing.T) {
36		-	h := &GlobalShortcutHandler{}
	36	+	h := &GlobalShortcutHandler{
	37	+	registered: make(map[KeyBinding]Action),
	38	+	lastDispatchAt: make(map[Action]time.Time),
	39	+	}
	40	+
	41	+	if h.suppressRepeatedShortcut(ActionZoomReset, time.Unix(100, 0)) {
	42	+	t.Fatal("one-shot shortcut was suppressed before detach")
	43	+	}
	44	+	h.Detach()
37	45		if !h.suppressRepeatedShortcut(ActionZoomReset, time.Unix(100, 0)) {
38	46		t.Fatal("one-shot shortcut was not suppressed with detached handler state")
39	47		}


@@ -33,7 +33,15 @@ func TestGlobalShortcutHandlerAllowsRepeatingNavigationActions(t *testing.T) {
33		}	33		}
34			34
35		func TestGlobalShortcutHandlerSuppressesOneShotActionsAfterDetach(t *testing.T) {	35		func TestGlobalShortcutHandlerSuppressesOneShotActionsAfterDetach(t *testing.T) {
36	-	h := &GlobalShortcutHandler{}	36	+	h := &GlobalShortcutHandler{
			37	+	registered: make(map[KeyBinding]Action),
			38	+	lastDispatchAt: make(map[Action]time.Time),
			39	+	}
			40	+
			41	+	if h.suppressRepeatedShortcut(ActionZoomReset, time.Unix(100, 0)) {
			42	+	t.Fatal("one-shot shortcut was suppressed before detach")
			43	+	}
			44	+	h.Detach()
37		if !h.suppressRepeatedShortcut(ActionZoomReset, time.Unix(100, 0)) {	45		if !h.suppressRepeatedShortcut(ActionZoomReset, time.Unix(100, 0)) {
38		t.Fatal("one-shot shortcut was not suppressed with detached handler state")	46		t.Fatal("one-shot shortcut was not suppressed with detached handler state")
39		}	47		}

A package-lock.json +6 -0

@@ -0,0 +1,6 @@
	1	+	{
	2	+	"name": "dumber",
	3	+	"lockfileVersion": 3,
	4	+	"requires": true,
	5	+	"packages": {}
	6	+	}

@@ -0,0 +1,6 @@
	1	+	{
	2	+	"name": "dumber",
	3	+	"lockfileVersion": 3,
	4	+	"requires": true,
	5	+	"packages": {}
	6	+	}

A scripts/cef-gpu-diagnostics.sh +185 -0

@@ -0,0 +1,185 @@
	1	+	#!/usr/bin/env bash
	2	+	set -euo pipefail
	3	+
	4	+	usage() {
	5	+	cat <<'EOF'
	6	+	Usage: scripts/cef-gpu-diagnostics.sh [options]
	7	+
	8	+	Capture a short, repeatable Dumber/CEF GPU-video diagnostic bundle while a
	9	+	YouTube video is playing.
	10	+
	11	+	Options:
	12	+	-p, --pid PID Dumber browser/root PID. Defaults to newest dumber process.
	13	+	-o, --out DIR Output directory. Default: .dev/dumber/gpu-diagnostics/<timestamp>
	14	+	-n, --samples N amdgpu_top JSON samples. Default: 10
	15	+	-i, --interval-ms MS amdgpu_top sample interval. Default: 1000
	16	+	--session-log PATH Copy a Dumber session log into the bundle.
	17	+	--codec-stats TEXT Record manually copied YouTube "Stats for nerds" text.
	18	+	--codec-stats-file PATH Record YouTube "Stats for nerds" text from a file.
	19	+	--devtools-port PORT Save http://127.0.0.1:PORT/json/version and /json tabs if enabled.
	20	+	-h, --help Show this help.
	21	+
	22	+	Recommended run shape:
	23	+	1. Start Dumber with CEF/VAAPI/profiling enabled.
	24	+	2. Open YouTube Stats for nerds and copy the Codecs line (or full panel text).
	25	+	3. Run this script while playback is active.
	26	+
	27	+	The bundle includes process/thread CPU, process command lines, /proc DRM fdinfo,
	28	+	amdgpu_top JSON capture, kernel DRM node metadata, optional DevTools tab metadata,
	29	+	and optional YouTube codec stats text.
	30	+	EOF
	31	+	}
	32	+
	33	+	pid=""
	34	+	out_dir=""
	35	+	samples=10
	36	+	interval_ms=1000
	37	+	session_log=""
	38	+	codec_stats=""
	39	+	codec_stats_file=""
	40	+	devtools_port=""
	41	+
	42	+	require_value() {
	43	+	local opt="$1"
	44	+	local value="${2:-}"
	45	+	if [[ -z "$value" \|\| "$value" == -* ]]; then
	46	+	echo "$opt requires a value" >&2
	47	+	usage >&2
	48	+	exit 2
	49	+	fi
	50	+	}
	51	+
	52	+	while [[ $# -gt 0 ]]; do
	53	+	case "$1" in
	54	+	-p\|--pid) require_value "$1" "${2:-}"; pid="$2"; shift 2 ;;
	55	+	-o\|--out) require_value "$1" "${2:-}"; out_dir="$2"; shift 2 ;;
	56	+	-n\|--samples) require_value "$1" "${2:-}"; samples="$2"; shift 2 ;;
	57	+	-i\|--interval-ms) require_value "$1" "${2:-}"; interval_ms="$2"; shift 2 ;;
	58	+	--session-log) require_value "$1" "${2:-}"; session_log="$2"; shift 2 ;;
	59	+	--codec-stats) require_value "$1" "${2:-}"; codec_stats="$2"; shift 2 ;;
	60	+	--codec-stats-file) require_value "$1" "${2:-}"; codec_stats_file="$2"; shift 2 ;;
	61	+	--devtools-port) require_value "$1" "${2:-}"; devtools_port="$2"; shift 2 ;;
	62	+	-h\|--help) usage; exit 0 ;;
	63	+	*) echo "unknown argument: $1" >&2; usage >&2; exit 2 ;;
	64	+	esac
	65	+	done
	66	+
	67	+	if [[ -z "$pid" ]]; then
	68	+	pid="$(pgrep -n -x dumber \|\| true)"
	69	+	fi
	70	+	if [[ -z "$pid" \|\| ! -d "/proc/$pid" ]]; then
	71	+	echo "could not find a live dumber PID; pass --pid" >&2
	72	+	exit 1
	73	+	fi
	74	+	if ! [[ "$samples" =~ ^[0-9]+$ && "$interval_ms" =~ ^[0-9]+$ ]]; then
	75	+	echo "--samples and --interval-ms must be positive integers" >&2
	76	+	exit 2
	77	+	fi
	78	+
	79	+	if [[ -z "$out_dir" ]]; then
	80	+	out_dir=".dev/dumber/gpu-diagnostics/$(date +%Y%m%d_%H%M%S)_pid${pid}"
	81	+	fi
	82	+	mkdir -p "$out_dir"
	83	+
	84	+	log() { printf '[cef-gpu-diagnostics] %s\n' "$*" >&2; }
	85	+
	86	+	collect_children() {
	87	+	local root="$1"
	88	+	local child
	89	+	printf '%s\n' "$root"
	90	+	for child in $(pgrep -P "$root" \|\| true); do
	91	+	collect_children "$child"
	92	+	done
	93	+	}
	94	+
	95	+	mapfile -t pids < <(collect_children "$pid" \| awk '!seen[$0]++')
	96	+	printf '%s\n' "${pids[@]}" > "$out_dir/pids.txt"
	97	+
	98	+	{
	99	+	echo "timestamp=$(date --iso-8601=seconds)"
	100	+	echo "root_pid=$pid"
	101	+	echo "samples=$samples"
	102	+	echo "interval_ms=$interval_ms"
	103	+	echo "uname=$(uname -a)"
	104	+	echo "wayland_display=${WAYLAND_DISPLAY:-}"
	105	+	echo "display=${DISPLAY:-}"
	106	+	command -v amdgpu_top >/dev/null && amdgpu_top --version 2>/dev/null \|\| true
	107	+	} > "$out_dir/metadata.txt"
	108	+
	109	+	log "writing process command lines and thread CPU"
	110	+	: > "$out_dir/cmdlines.txt"
	111	+	: > "$out_dir/thread_cpu.txt"
	112	+	for p in "${pids[@]}"; do
	113	+	[[ -d "/proc/$p" ]] \|\| continue
	114	+	{
	115	+	echo "--- pid=$p comm=$(cat "/proc/$p/comm" 2>/dev/null \|\| true)"
	116	+	tr '\0' ' ' < "/proc/$p/cmdline" \|\| true
	117	+	echo
	118	+	} >> "$out_dir/cmdlines.txt"
	119	+	ps -L -p "$p" -o pid,tid,ppid,pcpu,pmem,stat,comm,args --sort=-pcpu >> "$out_dir/thread_cpu.txt" 2>/dev/null \|\| true
	120	+	done
	121	+
	122	+	log "capturing DRM fdinfo"
	123	+	mkdir -p "$out_dir/fdinfo"
	124	+	for p in "${pids[@]}"; do
	125	+	[[ -d "/proc/$p/fdinfo" ]] \|\| continue
	126	+	out="$out_dir/fdinfo/pid_${p}.txt"
	127	+	: > "$out"
	128	+	for fd in "/proc/${p}/fdinfo"/*; do
	129	+	[[ -r "$fd" ]] \|\| continue
	130	+	if grep -Eq 'drm-\|amdgpu\|engine\|vram\|gtt\|cycles' "$fd" 2>/dev/null; then
	131	+	echo "--- $fd" >> "$out"
	132	+	cat "$fd" >> "$out" 2>/dev/null \|\| true
	133	+	fi
	134	+	done
	135	+	[[ -s "$out" ]] \|\| rm -f "$out"
	136	+	done
	137	+
	138	+	log "capturing DRM device metadata"
	139	+	mkdir -p "$out_dir/dri"
	140	+	for card in /sys/class/drm/card*; do
	141	+	[[ -e "$card" && ! "$card" =~ - ]] \|\| continue
	142	+	name="$(basename "$card")"
	143	+	{
	144	+	echo "--- $card"
	145	+	readlink -f "$card/device" \|\| true
	146	+	for f in vendor device revision subsystem_vendor subsystem_device; do
	147	+	[[ -r "$card/device/$f" ]] && printf '%s=' "$f" && cat "$card/device/$f"
	148	+	done
	149	+	} > "$out_dir/dri/${name}.txt"
	150	+	done
	151	+
	152	+	if command -v amdgpu_top >/dev/null; then
	153	+	log "capturing amdgpu_top JSON (${samples} samples @ ${interval_ms}ms)"
	154	+	amdgpu_top -J -s "$interval_ms" -n "$samples" -p -gm > "$out_dir/amdgpu_top.json" 2> "$out_dir/amdgpu_top.stderr" \|\| true
	155	+	if command -v jq >/dev/null; then
	156	+	jq '{period, devices: [.devices[]? \| {name: .Info.DeviceName, render: .Info.DevicePath.render, activity: .gpu_activity, total_fdinfo: .["Total fdinfo"], processes: (.fdinfo // {})}]}' \
	157	+	"$out_dir/amdgpu_top.json" > "$out_dir/amdgpu_top.summary.json" 2>/dev/null \|\| true
	158	+	fi
	159	+	else
	160	+	log "amdgpu_top not found; skipping GPU samples"
	161	+	fi
	162	+
	163	+	if [[ -n "$session_log" && -r "$session_log" ]]; then
	164	+	cp "$session_log" "$out_dir/$(basename "$session_log")"
	165	+	fi
	166	+	if [[ -n "$codec_stats_file" && -r "$codec_stats_file" ]]; then
	167	+	cp "$codec_stats_file" "$out_dir/youtube_stats_for_nerds.txt"
	168	+	elif [[ -n "$codec_stats" ]]; then
	169	+	printf '%s\n' "$codec_stats" > "$out_dir/youtube_stats_for_nerds.txt"
	170	+	else
	171	+	cat > "$out_dir/youtube_stats_for_nerds.README.txt" <<'EOF'
	172	+	No YouTube codec stats were supplied. Re-run with --codec-stats or
	173	+	--codec-stats-file after copying the YouTube "Stats for nerds" panel,
	174	+	especially the Codecs line (e.g. vp09/av01/h264) and viewport/resolution.
	175	+	EOF
	176	+	fi
	177	+
	178	+	if [[ -n "$devtools_port" ]]; then
	179	+	log "capturing DevTools metadata from port $devtools_port"
	180	+	curl --connect-timeout 1 --max-time 3 -fsS "http://127.0.0.1:${devtools_port}/json/version" > "$out_dir/devtools_version.json" 2> "$out_dir/devtools.stderr" \|\| true
	181	+	curl --connect-timeout 1 --max-time 3 -fsS "http://127.0.0.1:${devtools_port}/json" > "$out_dir/devtools_tabs.json" 2>> "$out_dir/devtools.stderr" \|\| true
	182	+	fi
	183	+
	184	+	log "bundle complete: $out_dir"
	185	+	printf '%s\n' "$out_dir"

@@ -0,0 +1,185 @@
	1	+	#!/usr/bin/env bash
	2	+	set -euo pipefail
	3	+
	4	+	usage() {
	5	+	cat <<'EOF'
	6	+	Usage: scripts/cef-gpu-diagnostics.sh [options]
	7	+
	8	+	Capture a short, repeatable Dumber/CEF GPU-video diagnostic bundle while a
	9	+	YouTube video is playing.
	10	+
	11	+	Options:
	12	+	-p, --pid PID Dumber browser/root PID. Defaults to newest dumber process.
	13	+	-o, --out DIR Output directory. Default: .dev/dumber/gpu-diagnostics/<timestamp>
	14	+	-n, --samples N amdgpu_top JSON samples. Default: 10
	15	+	-i, --interval-ms MS amdgpu_top sample interval. Default: 1000
	16	+	--session-log PATH Copy a Dumber session log into the bundle.
	17	+	--codec-stats TEXT Record manually copied YouTube "Stats for nerds" text.
	18	+	--codec-stats-file PATH Record YouTube "Stats for nerds" text from a file.
	19	+	--devtools-port PORT Save http://127.0.0.1:PORT/json/version and /json tabs if enabled.
	20	+	-h, --help Show this help.
	21	+
	22	+	Recommended run shape:
	23	+	1. Start Dumber with CEF/VAAPI/profiling enabled.
	24	+	2. Open YouTube Stats for nerds and copy the Codecs line (or full panel text).
	25	+	3. Run this script while playback is active.
	26	+
	27	+	The bundle includes process/thread CPU, process command lines, /proc DRM fdinfo,
	28	+	amdgpu_top JSON capture, kernel DRM node metadata, optional DevTools tab metadata,
	29	+	and optional YouTube codec stats text.
	30	+	EOF
	31	+	}
	32	+
	33	+	pid=""
	34	+	out_dir=""
	35	+	samples=10
	36	+	interval_ms=1000
	37	+	session_log=""
	38	+	codec_stats=""
	39	+	codec_stats_file=""
	40	+	devtools_port=""
	41	+
	42	+	require_value() {
	43	+	local opt="$1"
	44	+	local value="${2:-}"
	45	+	if [[ -z "$value" \|\| "$value" == -* ]]; then
	46	+	echo "$opt requires a value" >&2
	47	+	usage >&2
	48	+	exit 2
	49	+	fi
	50	+	}
	51	+
	52	+	while [[ $# -gt 0 ]]; do
	53	+	case "$1" in
	54	+	-p\|--pid) require_value "$1" "${2:-}"; pid="$2"; shift 2 ;;
	55	+	-o\|--out) require_value "$1" "${2:-}"; out_dir="$2"; shift 2 ;;
	56	+	-n\|--samples) require_value "$1" "${2:-}"; samples="$2"; shift 2 ;;
	57	+	-i\|--interval-ms) require_value "$1" "${2:-}"; interval_ms="$2"; shift 2 ;;
	58	+	--session-log) require_value "$1" "${2:-}"; session_log="$2"; shift 2 ;;
	59	+	--codec-stats) require_value "$1" "${2:-}"; codec_stats="$2"; shift 2 ;;
	60	+	--codec-stats-file) require_value "$1" "${2:-}"; codec_stats_file="$2"; shift 2 ;;
	61	+	--devtools-port) require_value "$1" "${2:-}"; devtools_port="$2"; shift 2 ;;
	62	+	-h\|--help) usage; exit 0 ;;
	63	+	*) echo "unknown argument: $1" >&2; usage >&2; exit 2 ;;
	64	+	esac
	65	+	done
	66	+
	67	+	if [[ -z "$pid" ]]; then
	68	+	pid="$(pgrep -n -x dumber \|\| true)"
	69	+	fi
	70	+	if [[ -z "$pid" \|\| ! -d "/proc/$pid" ]]; then
	71	+	echo "could not find a live dumber PID; pass --pid" >&2
	72	+	exit 1
	73	+	fi
	74	+	if ! [[ "$samples" =~ ^[0-9]+$ && "$interval_ms" =~ ^[0-9]+$ ]]; then
	75	+	echo "--samples and --interval-ms must be positive integers" >&2
	76	+	exit 2
	77	+	fi
	78	+
	79	+	if [[ -z "$out_dir" ]]; then
	80	+	out_dir=".dev/dumber/gpu-diagnostics/$(date +%Y%m%d_%H%M%S)_pid${pid}"
	81	+	fi
	82	+	mkdir -p "$out_dir"
	83	+
	84	+	log() { printf '[cef-gpu-diagnostics] %s\n' "$*" >&2; }
	85	+
	86	+	collect_children() {
	87	+	local root="$1"
	88	+	local child
	89	+	printf '%s\n' "$root"
	90	+	for child in $(pgrep -P "$root" \|\| true); do
	91	+	collect_children "$child"
	92	+	done
	93	+	}
	94	+
	95	+	mapfile -t pids < <(collect_children "$pid" \| awk '!seen[$0]++')
	96	+	printf '%s\n' "${pids[@]}" > "$out_dir/pids.txt"
	97	+
	98	+	{
	99	+	echo "timestamp=$(date --iso-8601=seconds)"
	100	+	echo "root_pid=$pid"
	101	+	echo "samples=$samples"
	102	+	echo "interval_ms=$interval_ms"
	103	+	echo "uname=$(uname -a)"
	104	+	echo "wayland_display=${WAYLAND_DISPLAY:-}"
	105	+	echo "display=${DISPLAY:-}"
	106	+	command -v amdgpu_top >/dev/null && amdgpu_top --version 2>/dev/null \|\| true
	107	+	} > "$out_dir/metadata.txt"
	108	+
	109	+	log "writing process command lines and thread CPU"
	110	+	: > "$out_dir/cmdlines.txt"
	111	+	: > "$out_dir/thread_cpu.txt"
	112	+	for p in "${pids[@]}"; do
	113	+	[[ -d "/proc/$p" ]] \|\| continue
	114	+	{
	115	+	echo "--- pid=$p comm=$(cat "/proc/$p/comm" 2>/dev/null \|\| true)"
	116	+	tr '\0' ' ' < "/proc/$p/cmdline" \|\| true
	117	+	echo
	118	+	} >> "$out_dir/cmdlines.txt"
	119	+	ps -L -p "$p" -o pid,tid,ppid,pcpu,pmem,stat,comm,args --sort=-pcpu >> "$out_dir/thread_cpu.txt" 2>/dev/null \|\| true
	120	+	done
	121	+
	122	+	log "capturing DRM fdinfo"
	123	+	mkdir -p "$out_dir/fdinfo"
	124	+	for p in "${pids[@]}"; do
	125	+	[[ -d "/proc/$p/fdinfo" ]] \|\| continue
	126	+	out="$out_dir/fdinfo/pid_${p}.txt"
	127	+	: > "$out"
	128	+	for fd in "/proc/${p}/fdinfo"/*; do
	129	+	[[ -r "$fd" ]] \|\| continue
	130	+	if grep -Eq 'drm-\|amdgpu\|engine\|vram\|gtt\|cycles' "$fd" 2>/dev/null; then
	131	+	echo "--- $fd" >> "$out"
	132	+	cat "$fd" >> "$out" 2>/dev/null \|\| true
	133	+	fi
	134	+	done
	135	+	[[ -s "$out" ]] \|\| rm -f "$out"
	136	+	done
	137	+
	138	+	log "capturing DRM device metadata"
	139	+	mkdir -p "$out_dir/dri"
	140	+	for card in /sys/class/drm/card*; do
	141	+	[[ -e "$card" && ! "$card" =~ - ]] \|\| continue
	142	+	name="$(basename "$card")"
	143	+	{
	144	+	echo "--- $card"
	145	+	readlink -f "$card/device" \|\| true
	146	+	for f in vendor device revision subsystem_vendor subsystem_device; do
	147	+	[[ -r "$card/device/$f" ]] && printf '%s=' "$f" && cat "$card/device/$f"
	148	+	done
	149	+	} > "$out_dir/dri/${name}.txt"
	150	+	done
	151	+
	152	+	if command -v amdgpu_top >/dev/null; then
	153	+	log "capturing amdgpu_top JSON (${samples} samples @ ${interval_ms}ms)"
	154	+	amdgpu_top -J -s "$interval_ms" -n "$samples" -p -gm > "$out_dir/amdgpu_top.json" 2> "$out_dir/amdgpu_top.stderr" \|\| true
	155	+	if command -v jq >/dev/null; then
	156	+	jq '{period, devices: [.devices[]? \| {name: .Info.DeviceName, render: .Info.DevicePath.render, activity: .gpu_activity, total_fdinfo: .["Total fdinfo"], processes: (.fdinfo // {})}]}' \
	157	+	"$out_dir/amdgpu_top.json" > "$out_dir/amdgpu_top.summary.json" 2>/dev/null \|\| true
	158	+	fi
	159	+	else
	160	+	log "amdgpu_top not found; skipping GPU samples"
	161	+	fi
	162	+
	163	+	if [[ -n "$session_log" && -r "$session_log" ]]; then
	164	+	cp "$session_log" "$out_dir/$(basename "$session_log")"
	165	+	fi
	166	+	if [[ -n "$codec_stats_file" && -r "$codec_stats_file" ]]; then
	167	+	cp "$codec_stats_file" "$out_dir/youtube_stats_for_nerds.txt"
	168	+	elif [[ -n "$codec_stats" ]]; then
	169	+	printf '%s\n' "$codec_stats" > "$out_dir/youtube_stats_for_nerds.txt"
	170	+	else
	171	+	cat > "$out_dir/youtube_stats_for_nerds.README.txt" <<'EOF'
	172	+	No YouTube codec stats were supplied. Re-run with --codec-stats or
	173	+	--codec-stats-file after copying the YouTube "Stats for nerds" panel,
	174	+	especially the Codecs line (e.g. vp09/av01/h264) and viewport/resolution.
	175	+	EOF
	176	+	fi
	177	+
	178	+	if [[ -n "$devtools_port" ]]; then
	179	+	log "capturing DevTools metadata from port $devtools_port"
	180	+	curl --connect-timeout 1 --max-time 3 -fsS "http://127.0.0.1:${devtools_port}/json/version" > "$out_dir/devtools_version.json" 2> "$out_dir/devtools.stderr" \|\| true
	181	+	curl --connect-timeout 1 --max-time 3 -fsS "http://127.0.0.1:${devtools_port}/json" > "$out_dir/devtools_tabs.json" 2>> "$out_dir/devtools.stderr" \|\| true
	182	+	fi
	183	+
	184	+	log "bundle complete: $out_dir"
	185	+	printf '%s\n' "$out_dir"

A scripts/generate-types.js +291 -0

@@ -0,0 +1,291 @@
	1	+	#!/usr/bin/env node
	2	+
	3	+	import { writeFileSync, readFileSync, existsSync, mkdirSync } from 'fs';
	4	+	import { join, dirname } from 'path';
	5	+
	6	+	/**
	7	+	* Generate TypeScript types from Go DTOs by parsing Go struct definitions
	8	+	* Watches for changes in Go files and regenerates automatically
	9	+	*/
	10	+
	11	+	const GO_MODELS_PATH = 'internal/db/';
	12	+	const GO_PARSER_PATH = 'internal/parser/';
	13	+	const TS_OUTPUT_PATH = 'gui/src/types/generated.ts';
	14	+
	15	+	// Helper function to convert Go types to TypeScript
	16	+	function convertGoTypeToTS(goType) {
	17	+	const cleanType = goType.trim().replace(/^\*/, ''); // Remove pointer indicator
	18	+
	19	+	// Handle Go slices: []Type -> Type[]
	20	+	if (cleanType.startsWith('[]')) {
	21	+	const elementType = cleanType.slice(2); // Remove []
	22	+	return convertGoTypeToTS(elementType) + '[]';
	23	+	}
	24	+
	25	+	// Handle sql.Null types
	26	+	if (cleanType.includes('sql.NullString')) return 'string \| null';
	27	+	if (cleanType.includes('sql.NullInt64')) return 'number \| null';
	28	+	if (cleanType.includes('sql.NullTime')) return 'string \| null';
	29	+	if (cleanType.includes('sql.NullBool')) return 'boolean \| null';
	30	+	if (cleanType.includes('sql.NullFloat64')) return 'number \| null';
	31	+
	32	+	// Handle Go package prefixes
	33	+	if (cleanType.includes('*db.History')) return 'History \| null';
	34	+	if (cleanType.includes('db.History')) return 'History';
	35	+
	36	+	if (cleanType.includes('time.Time')) return 'string'; // ISO date strings
	37	+	if (cleanType.includes('time.Duration')) return 'number'; // Nanoseconds
	38	+	if (cleanType.includes('map[string]interface{}')) return 'Record<string, unknown>';
	39	+	if (cleanType.includes('map[string]string')) return 'Record<string, string>';
	40	+	if (cleanType.includes('map[string]any')) return 'Record<string, unknown>';
	41	+	if (cleanType.includes('string')) return 'string';
	42	+	if (cleanType.includes('int') \|\| cleanType.includes('float')) return 'number';
	43	+	if (cleanType.includes('bool')) return 'boolean';
	44	+	if (cleanType.match(/^[A-Z][a-zA-Z0-9]*$/)) return cleanType; // Custom struct types
	45	+
	46	+	return 'unknown'; // Fallback
	47	+	}
	48	+
	49	+	// Parse Go struct to extract JSON field names and types
	50	+	function parseGoStruct(goCode, structName) {
	51	+	// More sophisticated regex to handle nested braces in type definitions
	52	+	const structStart = new RegExp(`type\\s+${structName}\\s+struct\\s*{`, 's');
	53	+	const startMatch = goCode.match(structStart);
	54	+
	55	+	if (!startMatch) return null;
	56	+
	57	+	// Find the matching closing brace by counting braces
	58	+	const startIndex = startMatch.index + startMatch[0].length;
	59	+	let braceCount = 1;
	60	+	let endIndex = startIndex;
	61	+
	62	+	for (let i = startIndex; i < goCode.length && braceCount > 0; i++) {
	63	+	if (goCode[i] === '{') braceCount++;
	64	+	if (goCode[i] === '}') braceCount--;
	65	+	endIndex = i;
	66	+	}
	67	+
	68	+	if (braceCount !== 0) return null; // Unmatched braces
	69	+
	70	+	const structContent = goCode.substring(startIndex, endIndex);
	71	+	const match = [null, structContent]; // Simulate regex match format
	72	+
	73	+	if (!match) return null;
	74	+
	75	+	// First, reconstruct the struct content by merging lines that belong together
	76	+	const rawContent = match[1];
	77	+	const lines = rawContent.split('\n').map(line => line.trim()).filter(line => line && !line.startsWith('//'));
	78	+
	79	+	// Merge multi-line field definitions
	80	+	const mergedFields = [];
	81	+	let currentField = '';
	82	+
	83	+	for (const line of lines) {
	84	+	// If line starts with a field name (capital letter), it's a new field
	85	+	if (/^\w+\s+/.test(line)) {
	86	+	// Save previous field if exists
	87	+	if (currentField) {
	88	+	mergedFields.push(currentField);
	89	+	}
	90	+	currentField = line;
	91	+	} else {
	92	+	// This line continues the previous field
	93	+	currentField += ' ' + line;
	94	+	}
	95	+	}
	96	+
	97	+	// Don't forget the last field
	98	+	if (currentField) {
	99	+	mergedFields.push(currentField);
	100	+	}
	101	+
	102	+	const fields = mergedFields.map(fieldLine => {
	103	+	// Check for embedded struct (no field name, just type)
	104	+	const embeddedMatch = fieldLine.match(/^([A-Z][a-zA-Z0-9])\s$/);
	105	+	if (embeddedMatch) {
	106	+	const embeddedType = embeddedMatch[1];
	107	+	// Return a special marker for embedded structs
	108	+	return {
	109	+	embedded: true,
	110	+	type: embeddedType
	111	+	};
	112	+	}
	113	+
	114	+	// Parse: FieldName type `json:"field_name,omitempty"`
	115	+	const fieldMatch = fieldLine.match(/^(\w+)\s+([^`]+?)\s`json:"([^"]+)".?`/);
	116	+	if (!fieldMatch) return null;
	117	+
	118	+	const [, , goType, jsonTag] = fieldMatch;
	119	+	const jsonField = jsonTag.split(',')[0]; // Remove omitempty, etc.
	120	+	const isOptional = jsonTag.includes('omitempty') \|\| jsonTag.includes(',omitempty') \|\| goType.trim().startsWith('*');
	121	+
	122	+	// Convert Go types to TypeScript using helper function
	123	+	const tsType = convertGoTypeToTS(goType.trim());
	124	+
	125	+	return {
	126	+	name: jsonField,
	127	+	type: tsType,
	128	+	optional: isOptional
	129	+	};
	130	+	})
	131	+	.filter(Boolean);
	132	+
	133	+	// Handle embedded structs by resolving their fields
	134	+	const resolvedFields = [];
	135	+	for (const field of fields) {
	136	+	if (field.embedded) {
	137	+	// Find the embedded struct and get its fields
	138	+	const embeddedFields = parseGoStruct(goCode, field.type);
	139	+	if (embeddedFields) {
	140	+	resolvedFields.push(...embeddedFields);
	141	+	}
	142	+	} else {
	143	+	resolvedFields.push(field);
	144	+	}
	145	+	}
	146	+
	147	+	return resolvedFields;
	148	+	}
	149	+
	150	+	function generateTSInterface(structName, fields) {
	151	+	const interfaceFields = fields.map(field =>
	152	+	` ${field.name}${field.optional ? '?' : ''}: ${field.type};`
	153	+	).join('\n');
	154	+
	155	+	return `export interface ${structName} {\n${interfaceFields}\n}`;
	156	+	}
	157	+
	158	+	// Function to discover all struct names in Go code
	159	+	function findAllStructs(goCode) {
	160	+	const structRegex = /type\s+([A-Z][a-zA-Z0-9])\s+struct\s{/g;
	161	+	const structs = [];
	162	+	let match;
	163	+
	164	+	while ((match = structRegex.exec(goCode)) !== null) {
	165	+	structs.push(match[1]);
	166	+	}
	167	+
	168	+	return structs;
	169	+	}
	170	+
	171	+	// Function to find Go enums (const declarations)
	172	+	function findGoEnums(goCode) {
	173	+	const enums = [];
	174	+
	175	+	// Look for InputType specifically
	176	+	if (goCode.includes('type InputType int')) {
	177	+	// Find the const block that contains InputType values
	178	+	const constRegex = /const\s$\s([\s\S]?)\s$/;
	179	+	const matches = goCode.match(constRegex);
	180	+
	181	+	if (matches) {
	182	+	const constBody = matches[1];
	183	+	// Look for any identifier that starts with InputType
	184	+	const lines = constBody.split('\n');
	185	+	const values = [];
	186	+
	187	+	for (const line of lines) {
	188	+	const trimmedLine = line.trim();
	189	+
	190	+	// Skip comment lines and empty lines
	191	+	if (trimmedLine.startsWith('//') \|\| trimmedLine === '') continue;
	192	+
	193	+	// Check if this line contains an InputType identifier
	194	+	const identifierMatch = trimmedLine.match(/^\s*(InputType\w+)/);
	195	+	if (identifierMatch) {
	196	+	values.push(identifierMatch[1]);
	197	+	}
	198	+	}
	199	+
	200	+	if (values.length > 0) {
	201	+	enums.push({ name: 'InputType', values });
	202	+	}
	203	+	}
	204	+	}
	205	+
	206	+	return enums;
	207	+	}
	208	+
	209	+	function generateTSEnum(enumName, values) {
	210	+	const enumValues = values.map((value, index) => ` ${value} = ${index}`).join(',\n');
	211	+	return `export enum ${enumName} {\n${enumValues}\n}`;
	212	+	}
	213	+
	214	+	function generateTypes() {
	215	+	console.log('🔧 Parsing Go structs and generating TypeScript types...');
	216	+
	217	+	const sourceFiles = [
	218	+	{ path: GO_MODELS_PATH, files: ['models.go'] },
	219	+	{ path: GO_PARSER_PATH, files: ['types.go'] }
	220	+	];
	221	+
	222	+	let combinedTypes = `// GENERATED FROM GO FILES: SEE THE GENERATOR SCRIPT
	223	+	// Auto-generated TypeScript types from Go structs
	224	+	// Generated on: ${new Date().toISOString()}
	225	+	// Generator script: scripts/generate-types.js
	226	+	// Source files: internal/db/models.go, internal/parser/types.go
	227	+	// Do not edit manually - run 'node scripts/generate-types.js' to regenerate
	228	+
	229	+	`;
	230	+
	231	+	const generatedEnums = new Set();
	232	+
	233	+	for (const { path, files } of sourceFiles) {
	234	+	for (const filename of files) {
	235	+	const filePath = join(path, filename);
	236	+	if (!existsSync(filePath)) continue;
	237	+
	238	+	const goCode = readFileSync(filePath, 'utf-8');
	239	+	console.log(` 📄 Processing ${filename}...`);
	240	+
	241	+	// Automatically discover all structs in this file
	242	+	const structsInFile = findAllStructs(goCode);
	243	+	const enumsInFile = findGoEnums(goCode);
	244	+
	245	+	// Generate enums first
	246	+	console.log(` Found ${enumsInFile.length} enums in ${filename}`);
	247	+	for (const enumDef of enumsInFile) {
	248	+	if (generatedEnums.has(enumDef.name)) {
	249	+	continue;
	250	+	}
	251	+	generatedEnums.add(enumDef.name);
	252	+	const tsEnum = generateTSEnum(enumDef.name, enumDef.values);
	253	+	combinedTypes += tsEnum + '\n\n';
	254	+	console.log(` ✓ Generated enum ${enumDef.name} with values: ${enumDef.values.join(', ')}`);
	255	+	}
	256	+
	257	+	for (const structName of structsInFile) {
	258	+	const fields = parseGoStruct(goCode, structName);
	259	+	if (fields && fields.length > 0) {
	260	+	const tsInterface = generateTSInterface(structName, fields);
	261	+	combinedTypes += tsInterface + '\n\n';
	262	+	console.log(` ✓ Generated ${structName}`);
	263	+	}
	264	+	}
	265	+	}
	266	+	}
	267	+
	268	+	// Add manual types that are hard to auto-generate
	269	+	combinedTypes += `// Manual types and aliases
	270	+	${generatedEnums.has('InputType') ? '' : `export enum InputType {
	271	+	InputTypeDirectURL = 0,
	272	+	InputTypeSearchShortcut = 1,
	273	+	InputTypeHistorySearch = 2,
	274	+	InputTypeFallbackSearch = 3,
	275	+	}
	276	+
	277	+	`}// Type aliases for frontend usage
	278	+	export type HistoryEntry = History;
	279	+	export type SearchShortcut = Shortcut;
	280	+	export type ZoomEntry = ZoomSetting;
	281	+	`;
	282	+
	283	+	// Ensure output directory exists
	284	+	mkdirSync(dirname(TS_OUTPUT_PATH), { recursive: true });
	285	+
	286	+	writeFileSync(TS_OUTPUT_PATH, combinedTypes);
	287	+	console.log(`✅ TypeScript types generated at: ${TS_OUTPUT_PATH}`);
	288	+	}
	289	+
	290	+	// One-time generation
	291	+	generateTypes();⏎̸

@@ -0,0 +1,291 @@
	1	+	#!/usr/bin/env node
	2	+
	3	+	import { writeFileSync, readFileSync, existsSync, mkdirSync } from 'fs';
	4	+	import { join, dirname } from 'path';
	5	+
	6	+	/**
	7	+	* Generate TypeScript types from Go DTOs by parsing Go struct definitions
	8	+	* Watches for changes in Go files and regenerates automatically
	9	+	*/
	10	+
	11	+	const GO_MODELS_PATH = 'internal/db/';
	12	+	const GO_PARSER_PATH = 'internal/parser/';
	13	+	const TS_OUTPUT_PATH = 'gui/src/types/generated.ts';
	14	+
	15	+	// Helper function to convert Go types to TypeScript
	16	+	function convertGoTypeToTS(goType) {
	17	+	const cleanType = goType.trim().replace(/^\*/, ''); // Remove pointer indicator
	18	+
	19	+	// Handle Go slices: []Type -> Type[]
	20	+	if (cleanType.startsWith('[]')) {
	21	+	const elementType = cleanType.slice(2); // Remove []
	22	+	return convertGoTypeToTS(elementType) + '[]';
	23	+	}
	24	+
	25	+	// Handle sql.Null types
	26	+	if (cleanType.includes('sql.NullString')) return 'string \| null';
	27	+	if (cleanType.includes('sql.NullInt64')) return 'number \| null';
	28	+	if (cleanType.includes('sql.NullTime')) return 'string \| null';
	29	+	if (cleanType.includes('sql.NullBool')) return 'boolean \| null';
	30	+	if (cleanType.includes('sql.NullFloat64')) return 'number \| null';
	31	+
	32	+	// Handle Go package prefixes
	33	+	if (cleanType.includes('*db.History')) return 'History \| null';
	34	+	if (cleanType.includes('db.History')) return 'History';
	35	+
	36	+	if (cleanType.includes('time.Time')) return 'string'; // ISO date strings
	37	+	if (cleanType.includes('time.Duration')) return 'number'; // Nanoseconds
	38	+	if (cleanType.includes('map[string]interface{}')) return 'Record<string, unknown>';
	39	+	if (cleanType.includes('map[string]string')) return 'Record<string, string>';
	40	+	if (cleanType.includes('map[string]any')) return 'Record<string, unknown>';
	41	+	if (cleanType.includes('string')) return 'string';
	42	+	if (cleanType.includes('int') \|\| cleanType.includes('float')) return 'number';
	43	+	if (cleanType.includes('bool')) return 'boolean';
	44	+	if (cleanType.match(/^[A-Z][a-zA-Z0-9]*$/)) return cleanType; // Custom struct types
	45	+
	46	+	return 'unknown'; // Fallback
	47	+	}
	48	+
	49	+	// Parse Go struct to extract JSON field names and types
	50	+	function parseGoStruct(goCode, structName) {
	51	+	// More sophisticated regex to handle nested braces in type definitions
	52	+	const structStart = new RegExp(`type\\s+${structName}\\s+struct\\s*{`, 's');
	53	+	const startMatch = goCode.match(structStart);
	54	+
	55	+	if (!startMatch) return null;
	56	+
	57	+	// Find the matching closing brace by counting braces
	58	+	const startIndex = startMatch.index + startMatch[0].length;
	59	+	let braceCount = 1;
	60	+	let endIndex = startIndex;
	61	+
	62	+	for (let i = startIndex; i < goCode.length && braceCount > 0; i++) {
	63	+	if (goCode[i] === '{') braceCount++;
	64	+	if (goCode[i] === '}') braceCount--;
	65	+	endIndex = i;
	66	+	}
	67	+
	68	+	if (braceCount !== 0) return null; // Unmatched braces
	69	+
	70	+	const structContent = goCode.substring(startIndex, endIndex);
	71	+	const match = [null, structContent]; // Simulate regex match format
	72	+
	73	+	if (!match) return null;
	74	+
	75	+	// First, reconstruct the struct content by merging lines that belong together
	76	+	const rawContent = match[1];
	77	+	const lines = rawContent.split('\n').map(line => line.trim()).filter(line => line && !line.startsWith('//'));
	78	+
	79	+	// Merge multi-line field definitions
	80	+	const mergedFields = [];
	81	+	let currentField = '';
	82	+
	83	+	for (const line of lines) {
	84	+	// If line starts with a field name (capital letter), it's a new field
	85	+	if (/^\w+\s+/.test(line)) {
	86	+	// Save previous field if exists
	87	+	if (currentField) {
	88	+	mergedFields.push(currentField);
	89	+	}
	90	+	currentField = line;
	91	+	} else {
	92	+	// This line continues the previous field
	93	+	currentField += ' ' + line;
	94	+	}
	95	+	}
	96	+
	97	+	// Don't forget the last field
	98	+	if (currentField) {
	99	+	mergedFields.push(currentField);
	100	+	}
	101	+
	102	+	const fields = mergedFields.map(fieldLine => {
	103	+	// Check for embedded struct (no field name, just type)
	104	+	const embeddedMatch = fieldLine.match(/^([A-Z][a-zA-Z0-9])\s$/);
	105	+	if (embeddedMatch) {
	106	+	const embeddedType = embeddedMatch[1];
	107	+	// Return a special marker for embedded structs
	108	+	return {
	109	+	embedded: true,
	110	+	type: embeddedType
	111	+	};
	112	+	}
	113	+
	114	+	// Parse: FieldName type `json:"field_name,omitempty"`
	115	+	const fieldMatch = fieldLine.match(/^(\w+)\s+([^`]+?)\s`json:"([^"]+)".?`/);
	116	+	if (!fieldMatch) return null;
	117	+
	118	+	const [, , goType, jsonTag] = fieldMatch;
	119	+	const jsonField = jsonTag.split(',')[0]; // Remove omitempty, etc.
	120	+	const isOptional = jsonTag.includes('omitempty') \|\| jsonTag.includes(',omitempty') \|\| goType.trim().startsWith('*');
	121	+
	122	+	// Convert Go types to TypeScript using helper function
	123	+	const tsType = convertGoTypeToTS(goType.trim());
	124	+
	125	+	return {
	126	+	name: jsonField,
	127	+	type: tsType,
	128	+	optional: isOptional
	129	+	};
	130	+	})
	131	+	.filter(Boolean);
	132	+
	133	+	// Handle embedded structs by resolving their fields
	134	+	const resolvedFields = [];
	135	+	for (const field of fields) {
	136	+	if (field.embedded) {
	137	+	// Find the embedded struct and get its fields
	138	+	const embeddedFields = parseGoStruct(goCode, field.type);
	139	+	if (embeddedFields) {
	140	+	resolvedFields.push(...embeddedFields);
	141	+	}
	142	+	} else {
	143	+	resolvedFields.push(field);
	144	+	}
	145	+	}
	146	+
	147	+	return resolvedFields;
	148	+	}
	149	+
	150	+	function generateTSInterface(structName, fields) {
	151	+	const interfaceFields = fields.map(field =>
	152	+	` ${field.name}${field.optional ? '?' : ''}: ${field.type};`
	153	+	).join('\n');
	154	+
	155	+	return `export interface ${structName} {\n${interfaceFields}\n}`;
	156	+	}
	157	+
	158	+	// Function to discover all struct names in Go code
	159	+	function findAllStructs(goCode) {
	160	+	const structRegex = /type\s+([A-Z][a-zA-Z0-9])\s+struct\s{/g;
	161	+	const structs = [];
	162	+	let match;
	163	+
	164	+	while ((match = structRegex.exec(goCode)) !== null) {
	165	+	structs.push(match[1]);
	166	+	}
	167	+
	168	+	return structs;
	169	+	}
	170	+
	171	+	// Function to find Go enums (const declarations)
	172	+	function findGoEnums(goCode) {
	173	+	const enums = [];
	174	+
	175	+	// Look for InputType specifically
	176	+	if (goCode.includes('type InputType int')) {
	177	+	// Find the const block that contains InputType values
	178	+	const constRegex = /const\s$\s([\s\S]?)\s$/;
	179	+	const matches = goCode.match(constRegex);
	180	+
	181	+	if (matches) {
	182	+	const constBody = matches[1];
	183	+	// Look for any identifier that starts with InputType
	184	+	const lines = constBody.split('\n');
	185	+	const values = [];
	186	+
	187	+	for (const line of lines) {
	188	+	const trimmedLine = line.trim();
	189	+
	190	+	// Skip comment lines and empty lines
	191	+	if (trimmedLine.startsWith('//') \|\| trimmedLine === '') continue;
	192	+
	193	+	// Check if this line contains an InputType identifier
	194	+	const identifierMatch = trimmedLine.match(/^\s*(InputType\w+)/);
	195	+	if (identifierMatch) {
	196	+	values.push(identifierMatch[1]);
	197	+	}
	198	+	}
	199	+
	200	+	if (values.length > 0) {
	201	+	enums.push({ name: 'InputType', values });
	202	+	}
	203	+	}
	204	+	}
	205	+
	206	+	return enums;
	207	+	}
	208	+
	209	+	function generateTSEnum(enumName, values) {
	210	+	const enumValues = values.map((value, index) => ` ${value} = ${index}`).join(',\n');
	211	+	return `export enum ${enumName} {\n${enumValues}\n}`;
	212	+	}
	213	+
	214	+	function generateTypes() {
	215	+	console.log('🔧 Parsing Go structs and generating TypeScript types...');
	216	+
	217	+	const sourceFiles = [
	218	+	{ path: GO_MODELS_PATH, files: ['models.go'] },
	219	+	{ path: GO_PARSER_PATH, files: ['types.go'] }
	220	+	];
	221	+
	222	+	let combinedTypes = `// GENERATED FROM GO FILES: SEE THE GENERATOR SCRIPT
	223	+	// Auto-generated TypeScript types from Go structs
	224	+	// Generated on: ${new Date().toISOString()}
	225	+	// Generator script: scripts/generate-types.js
	226	+	// Source files: internal/db/models.go, internal/parser/types.go
	227	+	// Do not edit manually - run 'node scripts/generate-types.js' to regenerate
	228	+
	229	+	`;
	230	+
	231	+	const generatedEnums = new Set();
	232	+
	233	+	for (const { path, files } of sourceFiles) {
	234	+	for (const filename of files) {
	235	+	const filePath = join(path, filename);
	236	+	if (!existsSync(filePath)) continue;
	237	+
	238	+	const goCode = readFileSync(filePath, 'utf-8');
	239	+	console.log(` 📄 Processing ${filename}...`);
	240	+
	241	+	// Automatically discover all structs in this file
	242	+	const structsInFile = findAllStructs(goCode);
	243	+	const enumsInFile = findGoEnums(goCode);
	244	+
	245	+	// Generate enums first
	246	+	console.log(` Found ${enumsInFile.length} enums in ${filename}`);
	247	+	for (const enumDef of enumsInFile) {
	248	+	if (generatedEnums.has(enumDef.name)) {
	249	+	continue;
	250	+	}
	251	+	generatedEnums.add(enumDef.name);
	252	+	const tsEnum = generateTSEnum(enumDef.name, enumDef.values);
	253	+	combinedTypes += tsEnum + '\n\n';
	254	+	console.log(` ✓ Generated enum ${enumDef.name} with values: ${enumDef.values.join(', ')}`);
	255	+	}
	256	+
	257	+	for (const structName of structsInFile) {
	258	+	const fields = parseGoStruct(goCode, structName);
	259	+	if (fields && fields.length > 0) {
	260	+	const tsInterface = generateTSInterface(structName, fields);
	261	+	combinedTypes += tsInterface + '\n\n';
	262	+	console.log(` ✓ Generated ${structName}`);
	263	+	}
	264	+	}
	265	+	}
	266	+	}
	267	+
	268	+	// Add manual types that are hard to auto-generate
	269	+	combinedTypes += `// Manual types and aliases
	270	+	${generatedEnums.has('InputType') ? '' : `export enum InputType {
	271	+	InputTypeDirectURL = 0,
	272	+	InputTypeSearchShortcut = 1,
	273	+	InputTypeHistorySearch = 2,
	274	+	InputTypeFallbackSearch = 3,
	275	+	}
	276	+
	277	+	`}// Type aliases for frontend usage
	278	+	export type HistoryEntry = History;
	279	+	export type SearchShortcut = Shortcut;
	280	+	export type ZoomEntry = ZoomSetting;
	281	+	`;
	282	+
	283	+	// Ensure output directory exists
	284	+	mkdirSync(dirname(TS_OUTPUT_PATH), { recursive: true });
	285	+
	286	+	writeFileSync(TS_OUTPUT_PATH, combinedTypes);
	287	+	console.log(`✅ TypeScript types generated at: ${TS_OUTPUT_PATH}`);
	288	+	}
	289	+
	290	+	// One-time generation
	291	+	generateTypes();⏎̸