1// SPDX-License-Identifier: Apache-2.0
2// SPDX-FileCopyrightText: 2023 The Ebitengine Authors
3
4//go:build darwin || (linux && (!cgo || amd64 || arm64))
5
6package purego_test
7
8import (
9 "os"
10 "path/filepath"
11 "testing"
12 "unsafe"
13
14 "github.com/ebitengine/purego"
15)
16
17// TestCallGoFromSharedLib is a test that checks for stack corruption on arm64
18// when C calls Go code from a non-Go thread in a dynamically loaded share library.
19func TestCallGoFromSharedLib(t *testing.T) {
20 libFileName := filepath.Join(t.TempDir(), "libcbtest.so")
21 t.Logf("Build %v", libFileName)
22
23 if err := buildSharedLib("CC", libFileName, filepath.Join("libcbtest", "callback_test.c")); err != nil {
24 t.Fatal(err)
25 }
26 defer os.Remove(libFileName)
27
28 lib, err := purego.Dlopen(libFileName, purego.RTLD_NOW|purego.RTLD_GLOBAL)
29 if err != nil {
30 t.Fatalf("Dlopen(%q) failed: %v", libFileName, err)
31 }
32
33 var callCallback func(p uintptr, s string) int
34 purego.RegisterLibFunc(&callCallback, lib, "callCallback")
35
36 goFunc := func(cstr *byte, n int) int {
37 s := string(unsafe.Slice(cstr, n))
38 t.Logf("FROM Go: %s\n", s)
39 return 1
40 }
41
42 const want = 10101
43 cb := purego.NewCallback(goFunc)
44 for i := 0; i < 10; i++ {
45 got := callCallback(cb, "a test string")
46 if got != want {
47 t.Fatalf("%d: callCallback() got %v want %v", i, got, want)
48 }
49 }
50}
51
52func TestNewCallbackFloat64(t *testing.T) {
53 // This tests the maximum number of arguments a function to NewCallback can take
54 const (
55 expectCbTotal = -3
56 expectedCbTotalF = float64(36)
57 )
58 var cbTotal int
59 var cbTotalF float64
60 imp := purego.NewCallback(func(a1, a2, a3, a4, a5, a6, a7, a8, a9 int,
61 f1, f2, f3, f4, f5, f6, f7, f8 float64,
62 ) {
63 cbTotal = a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8 + a9
64 cbTotalF = f1 + f2 + f3 + f4 + f5 + f6 + f7 + f8
65 })
66 var fn func(a1, a2, a3, a4, a5, a6, a7, a8, a9 int,
67 f1, f2, f3, f4, f5, f6, f7, f8 float64)
68 purego.RegisterFunc(&fn, imp)
69 fn(1, 2, -3, 4, -5, 6, -7, 8, -9,
70 1, 2, 3, 4, 5, 6, 7, 8)
71
72 if cbTotal != expectCbTotal {
73 t.Errorf("cbTotal not correct got %d but wanted %d", cbTotal, expectCbTotal)
74 }
75 if cbTotalF != expectedCbTotalF {
76 t.Errorf("cbTotalF not correct got %f but wanted %f", cbTotalF, expectedCbTotalF)
77 }
78}
79
80func TestNewCallbackFloat64AndIntMix(t *testing.T) {
81 // This tests interleaving float and integer arguments to NewCallback
82 const (
83 expectCbTotal = 54.75
84 )
85 var cbTotal float64
86 imp := purego.NewCallback(func(a1, a2 float64, a3, a4, a5 int, a6, a7, a8 float64, a9 int) {
87 cbTotal = a1 + a2 + float64(a3) + float64(a4) + float64(a5) + a6 + a7 + a8 + float64(a9)
88 })
89 var fn func(a1, a2 float64, a3, a4, a5 int, a6, a7, a8 float64, a9 int)
90 purego.RegisterFunc(&fn, imp)
91 fn(1.25, 3.25, 4, 5, 6, 7.5, 8.25, 9.5, 10)
92
93 if cbTotal != expectCbTotal {
94 t.Errorf("cbTotal not correct got %f but wanted %f", cbTotal, expectCbTotal)
95 }
96}
97
98func TestNewCallbackFloat32(t *testing.T) {
99 // This tests the maximum number of float32 arguments a function to NewCallback can take
100 const (
101 expectCbTotal = 6
102 expectedCbTotalF = float32(45)
103 )
104 var cbTotal int
105 var cbTotalF float32
106 imp := purego.NewCallback(func(a1, a2, a3, a4, a5, a6, a7, a8 int,
107 f1, f2, f3, f4, f5, f6, f7, f8, f9 float32,
108 ) {
109 cbTotal = a1 + a2 + a3 + a4 + a5 + a6 + a7 + a8
110 cbTotalF = f1 + f2 + f3 + f4 + f5 + f6 + f7 + f8 + f9
111 })
112 var fn func(a1, a2, a3, a4, a5, a6, a7, a8 int,
113 f1, f2, f3, f4, f5, f6, f7, f8, f9 float32)
114 purego.RegisterFunc(&fn, imp)
115 fn(1, 2, -3, 4, -5, 6, -7, 8,
116 1, 2, 3, 4, 5, 6, 7, 8, 9)
117
118 if cbTotal != expectCbTotal {
119 t.Errorf("cbTotal not correct got %d but wanted %d", cbTotal, expectCbTotal)
120 }
121 if cbTotalF != expectedCbTotalF {
122 t.Errorf("cbTotalF not correct got %f but wanted %f", cbTotalF, expectedCbTotalF)
123 }
124}
125
126func TestNewCallbackFloat32AndFloat64(t *testing.T) {
127 // This tests that calling a function with a mix of float32 and float64 arguments works
128 const (
129 expectedCbTotalF32 = float32(72)
130 expectedCbTotalF64 = float64(48)
131 )
132 var cbTotalF32 float32
133 var cbTotalF64 float64
134 imp := purego.NewCallback(func(f1, f2, f3 float32, f4, f5, f6 float64, f7, f8, f9 float32, f10, f11, f12 float64, f13, f14, f15 float32) {
135 cbTotalF32 = f1 + f2 + f3 + f7 + f8 + f9 + f13 + f14 + f15
136 cbTotalF64 = f4 + f5 + f6 + f10 + f11 + f12
137 })
138 var fn func(f1, f2, f3 float32, f4, f5, f6 float64, f7, f8, f9 float32, f10, f11, f12 float64, f13, f14, f15 float32)
139 purego.RegisterFunc(&fn, imp)
140 fn(1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
141
142 if cbTotalF32 != expectedCbTotalF32 {
143 t.Errorf("cbTotalF32 not correct got %f but wanted %f", cbTotalF32, expectedCbTotalF32)
144 }
145 if cbTotalF64 != expectedCbTotalF64 {
146 t.Errorf("cbTotalF64 not correct got %f but wanted %f", cbTotalF64, expectedCbTotalF64)
147 }
148}