summaryrefslogtreecommitdiffstats
path: root/misc/cgo/test/testx.go
blob: 2b2e69ec00f162e7f2c9c0f141c73704ec2c7c83 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

// Test cases for cgo.
// Both the import "C" prologue and the main file are sorted by issue number.
// This file contains //export directives on Go functions
// and so it must NOT contain C definitions (only declarations).
// See test.go for C definitions.

package cgotest

import (
	"runtime"
	"runtime/debug"
	"strings"
	"sync"
	"sync/atomic"
	"testing"
	"time"
	"unsafe"
)

/*
// threads
extern void doAdd(int, int);

// issue 1328
extern void BackIntoGo(void);
void IntoC(void);

// issue 1560
// mysleep returns the absolute start time in ms.
long long mysleep(int seconds);

// twoSleep returns the absolute start time of the first sleep
// in ms.
long long twoSleep(int);

// issue 3775
void lockOSThreadCallback(void);
inline static void lockOSThreadC(void)
{
        lockOSThreadCallback();
}
int usleep(unsigned usec);

// issue 4054 part 2 - part 1 in test.go
typedef enum {
	A = 0,
	B,
	C,
	D,
	E,
	F,
	G,
	H,
	II,
	J,
} issue4054b;

// issue 5548

extern int issue5548_in_c(void);

// issue 6833

extern unsigned long long issue6833Func(unsigned int, unsigned long long);

// issue 6907

extern int CheckIssue6907C(_GoString_);

// issue 7665

extern void f7665(void);

// issue 7978
// Stack tracing didn't work during cgo code after calling a Go
// callback.  Make sure GC works and the stack trace is correct.

#include <stdint.h>

void issue7978cb(void);

// use ugly atomic variable sync since that doesn't require calling back into
// Go code or OS dependencies
static void issue7978c(uint32_t *sync) {
	while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 0)
		;
	__atomic_add_fetch(sync, 1, __ATOMIC_SEQ_CST);
	while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 2)
		;
	issue7978cb();
	__atomic_add_fetch(sync, 1, __ATOMIC_SEQ_CST);
	while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 6)
		;
}

// issue 8331 part 2 - part 1 in test.go
// A typedef of an unnamed struct is the same struct when
// #include'd twice.  No runtime test; just make sure it compiles.
#include "issue8331.h"

// issue 8945

typedef void (*PFunc8945)();
extern PFunc8945 func8945; // definition is in test.go

// issue 20910
void callMulti(void);

// issue 28772 part 2 - part 1 in issuex.go
#define issue28772Constant2 2


// issue 31891
typedef struct {
	long obj;
} Issue31891A;

typedef struct {
	long obj;
} Issue31891B;

void callIssue31891(void);

typedef struct {
	int i;
} Issue38408, *PIssue38408;

*/
import "C"

// exports

//export ReturnIntLong
func ReturnIntLong() (int, C.long) {
	return 1, 2
}

//export gc
func gc() {
	runtime.GC()
}

// threads

var sum struct {
	sync.Mutex
	i int
}

//export Add
func Add(x int) {
	defer func() {
		recover()
	}()
	sum.Lock()
	sum.i += x
	sum.Unlock()
	var p *int
	*p = 2
}

func testCthread(t *testing.T) {
	if (runtime.GOOS == "darwin" || runtime.GOOS == "ios") && runtime.GOARCH == "arm64" {
		t.Skip("the iOS exec wrapper is unable to properly handle the panic from Add")
	}
	sum.i = 0
	C.doAdd(10, 6)

	want := 10 * (10 - 1) / 2 * 6
	if sum.i != want {
		t.Fatalf("sum=%d, want %d", sum.i, want)
	}
}

// issue 1328

//export BackIntoGo
func BackIntoGo() {
	x := 1

	for i := 0; i < 10000; i++ {
		xvariadic(x)
		if x != 1 {
			panic("x is not 1?")
		}
	}
}

func xvariadic(x ...interface{}) {
}

func test1328(t *testing.T) {
	C.IntoC()
}

// issue 1560

var sleepDone = make(chan int64)

// parallelSleep returns the absolute difference between the start time
// of the two sleeps.
func parallelSleep(n int) int64 {
	t := int64(C.twoSleep(C.int(n))) - <-sleepDone
	if t < 0 {
		return -t
	}
	return t
}

//export BackgroundSleep
func BackgroundSleep(n int32) {
	go func() {
		sleepDone <- int64(C.mysleep(C.int(n)))
	}()
}

func testParallelSleep(t *testing.T) {
	sleepSec := 1
	dt := time.Duration(parallelSleep(sleepSec)) * time.Millisecond
	t.Logf("difference in start time for two sleep(%d) is %v", sleepSec, dt)
	// bug used to run sleeps in serial, producing a 2*sleepSec-second delay.
	// we detect if the start times of those sleeps are > 0.5*sleepSec-second.
	if dt >= time.Duration(sleepSec)*time.Second/2 {
		t.Fatalf("parallel %d-second sleeps slept for %f seconds", sleepSec, dt.Seconds())
	}
}

// issue 2462

//export exportbyte
func exportbyte() byte {
	return 0
}

//export exportbool
func exportbool() bool {
	return false
}

//export exportrune
func exportrune() rune {
	return 0
}

//export exporterror
func exporterror() error {
	return nil
}

//export exportint
func exportint() int {
	return 0
}

//export exportuint
func exportuint() uint {
	return 0
}

//export exportuintptr
func exportuintptr() uintptr {
	return (uintptr)(0)
}

//export exportint8
func exportint8() int8 {
	return 0
}

//export exportuint8
func exportuint8() uint8 {
	return 0
}

//export exportint16
func exportint16() int16 {
	return 0
}

//export exportuint16
func exportuint16() uint16 {
	return 0
}

//export exportint32
func exportint32() int32 {
	return 0
}

//export exportuint32
func exportuint32() uint32 {
	return 0
}

//export exportint64
func exportint64() int64 {
	return 0
}

//export exportuint64
func exportuint64() uint64 {
	return 0
}

//export exportfloat32
func exportfloat32() float32 {
	return 0
}

//export exportfloat64
func exportfloat64() float64 {
	return 0
}

//export exportcomplex64
func exportcomplex64() complex64 {
	return 0
}

//export exportcomplex128
func exportcomplex128() complex128 {
	return 0
}

// issue 3741

//export exportSliceIn
func exportSliceIn(s []byte) bool {
	return len(s) == cap(s)
}

//export exportSliceOut
func exportSliceOut() []byte {
	return []byte{1}
}

//export exportSliceInOut
func exportSliceInOut(s []byte) []byte {
	return s
}

// issue 3775

func init() {
	if runtime.GOOS == "android" {
		return
	}
	// Same as test3775 but run during init so that
	// there are two levels of internal runtime lock
	// (1 for init, 1 for cgo).
	// This would have been broken by CL 11663043.
	C.lockOSThreadC()
}

func test3775(t *testing.T) {
	if runtime.GOOS == "android" {
		return
	}
	// Used to panic because of the UnlockOSThread below.
	C.lockOSThreadC()
}

//export lockOSThreadCallback
func lockOSThreadCallback() {
	runtime.LockOSThread()
	runtime.UnlockOSThread()
	go C.usleep(10000)
	runtime.Gosched()
}

// issue 4054 part 2 - part 1 in test.go

var issue4054b = []int{C.A, C.B, C.C, C.D, C.E, C.F, C.G, C.H, C.II, C.J}

//export issue5548FromC
func issue5548FromC(s string, i int) int {
	if len(s) == 4 && s == "test" && i == 42 {
		return 12345
	}
	println("got", len(s), i)
	return 9876
}

func test5548(t *testing.T) {
	if x := C.issue5548_in_c(); x != 12345 {
		t.Errorf("issue5548_in_c = %d, want %d", x, 12345)
	}
}

// issue 6833

//export GoIssue6833Func
func GoIssue6833Func(aui uint, aui64 uint64) uint64 {
	return aui64 + uint64(aui)
}

func test6833(t *testing.T) {
	ui := 7
	ull := uint64(0x4000300020001000)
	v := uint64(C.issue6833Func(C.uint(ui), C.ulonglong(ull)))
	exp := uint64(ui) + ull
	if v != exp {
		t.Errorf("issue6833Func() returns %x, expected %x", v, exp)
	}
}

// issue 6907

const CString = "C string"

//export CheckIssue6907Go
func CheckIssue6907Go(s string) C.int {
	if s == CString {
		return 1
	}
	return 0
}

func test6907Go(t *testing.T) {
	if got := C.CheckIssue6907C(CString); got != 1 {
		t.Errorf("C.CheckIssue6907C() == %d, want %d", got, 1)
	}
}

// issue 7665

//export f7665
func f7665() {}

var bad7665 unsafe.Pointer = C.f7665
var good7665 uintptr = uintptr(C.f7665)

func test7665(t *testing.T) {
	if bad7665 == nil || uintptr(bad7665) != good7665 {
		t.Errorf("ptrs = %p, %#x, want same non-nil pointer", bad7665, good7665)
	}
}

// issue 7978

var issue7978sync uint32

func issue7978check(t *testing.T, wantFunc string, badFunc string, depth int) {
	runtime.GC()
	buf := make([]byte, 65536)
	trace := string(buf[:runtime.Stack(buf, true)])
	for _, goroutine := range strings.Split(trace, "\n\n") {
		if strings.Contains(goroutine, "test.issue7978go") {
			trace := strings.Split(goroutine, "\n")
			// look for the expected function in the stack
			for i := 0; i < depth; i++ {
				if badFunc != "" && strings.Contains(trace[1+2*i], badFunc) {
					t.Errorf("bad stack: found %s in the stack:\n%s", badFunc, goroutine)
					return
				}
				if strings.Contains(trace[1+2*i], wantFunc) {
					return
				}
			}
			t.Errorf("bad stack: didn't find %s in the stack:\n%s", wantFunc, goroutine)
			return
		}
	}
	t.Errorf("bad stack: goroutine not found. Full stack dump:\n%s", trace)
}

func issue7978wait(store uint32, wait uint32) {
	if store != 0 {
		atomic.StoreUint32(&issue7978sync, store)
	}
	for atomic.LoadUint32(&issue7978sync) != wait {
		runtime.Gosched()
	}
}

//export issue7978cb
func issue7978cb() {
	// Force a stack growth from the callback to put extra
	// pressure on the runtime. See issue #17785.
	growStack(64)
	issue7978wait(3, 4)
}

func growStack(n int) int {
	var buf [128]int
	if n == 0 {
		return 0
	}
	return buf[growStack(n-1)]
}

func issue7978go() {
	C.issue7978c((*C.uint32_t)(&issue7978sync))
	issue7978wait(7, 8)
}

func test7978(t *testing.T) {
	if runtime.Compiler == "gccgo" {
		t.Skip("gccgo can not do stack traces of C code")
	}
	debug.SetTraceback("2")
	issue7978sync = 0
	go issue7978go()
	// test in c code, before callback
	issue7978wait(0, 1)
	issue7978check(t, "_Cfunc_issue7978c(", "", 1)
	// test in go code, during callback
	issue7978wait(2, 3)
	issue7978check(t, "test.issue7978cb(", "test.issue7978go", 3)
	// test in c code, after callback
	issue7978wait(4, 5)
	issue7978check(t, "_Cfunc_issue7978c(", "_cgoexpwrap", 1)
	// test in go code, after return from cgo
	issue7978wait(6, 7)
	issue7978check(t, "test.issue7978go(", "", 3)
	atomic.StoreUint32(&issue7978sync, 8)
}

// issue 8331 part 2

var issue8331Var C.issue8331

// issue 8945

//export Test8945
func Test8945() {
	_ = C.func8945
}

// issue 20910

//export multi
func multi() (*C.char, C.int) {
	return C.CString("multi"), 0
}

func test20910(t *testing.T) {
	C.callMulti()
}

// issue 28772 part 2

const issue28772Constant2 = C.issue28772Constant2

// issue 31891

//export useIssue31891A
func useIssue31891A(c *C.Issue31891A) {}

//export useIssue31891B
func useIssue31891B(c *C.Issue31891B) {}

func test31891(t *testing.T) {
	C.callIssue31891()
}

// issue 38408
// A typedef pointer can be used as the element type.
// No runtime test; just make sure it compiles.
var _ C.PIssue38408 = &C.Issue38408{i: 1}