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565 lines
10 KiB
565 lines
10 KiB
// Copyright 2011 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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// Test cases for cgo.
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// Both the import "C" prologue and the main file are sorted by issue number.
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// This file contains //export directives on Go functions
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// and so it must NOT contain C definitions (only declarations).
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// See test.go for C definitions.
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package cgotest
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import (
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"runtime"
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"runtime/debug"
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"strings"
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"sync"
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"sync/atomic"
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"testing"
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"time"
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"unsafe"
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)
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/*
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// threads
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extern void doAdd(int, int);
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// issue 1328
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extern void BackIntoGo(void);
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void IntoC(void);
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// issue 1560
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// mysleep returns the absolute start time in ms.
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long long mysleep(int seconds);
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// twoSleep returns the absolute start time of the first sleep
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// in ms.
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long long twoSleep(int);
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// issue 3775
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void lockOSThreadCallback(void);
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inline static void lockOSThreadC(void)
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{
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lockOSThreadCallback();
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}
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int usleep(unsigned usec);
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// issue 4054 part 2 - part 1 in test.go
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typedef enum {
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A = 0,
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B,
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C,
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D,
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E,
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F,
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G,
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H,
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II,
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J,
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} issue4054b;
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// issue 5548
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extern int issue5548_in_c(void);
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// issue 6833
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extern unsigned long long issue6833Func(unsigned int, unsigned long long);
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// issue 6907
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extern int CheckIssue6907C(_GoString_);
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// issue 7665
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extern void f7665(void);
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// issue 7978
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// Stack tracing didn't work during cgo code after calling a Go
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// callback. Make sure GC works and the stack trace is correct.
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#include <stdint.h>
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void issue7978cb(void);
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// use ugly atomic variable sync since that doesn't require calling back into
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// Go code or OS dependencies
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static void issue7978c(uint32_t *sync) {
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while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 0)
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;
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__atomic_add_fetch(sync, 1, __ATOMIC_SEQ_CST);
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while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 2)
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;
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issue7978cb();
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__atomic_add_fetch(sync, 1, __ATOMIC_SEQ_CST);
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while(__atomic_load_n(sync, __ATOMIC_SEQ_CST) != 6)
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;
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}
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// issue 8331 part 2 - part 1 in test.go
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// A typedef of an unnamed struct is the same struct when
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// #include'd twice. No runtime test; just make sure it compiles.
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#include "issue8331.h"
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// issue 8945
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typedef void (*PFunc8945)();
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extern PFunc8945 func8945; // definition is in test.go
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// issue 20910
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void callMulti(void);
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// issue 28772 part 2 - part 1 in issuex.go
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#define issue28772Constant2 2
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// issue 31891
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typedef struct {
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long obj;
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} Issue31891A;
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typedef struct {
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long obj;
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} Issue31891B;
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void callIssue31891(void);
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typedef struct {
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int i;
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} Issue38408, *PIssue38408;
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*/
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import "C"
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// exports
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//export ReturnIntLong
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func ReturnIntLong() (int, C.long) {
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return 1, 2
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}
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//export gc
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func gc() {
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runtime.GC()
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}
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// threads
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var sum struct {
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sync.Mutex
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i int
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}
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//export Add
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func Add(x int) {
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defer func() {
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recover()
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}()
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sum.Lock()
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sum.i += x
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sum.Unlock()
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var p *int
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*p = 2
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}
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func testCthread(t *testing.T) {
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if runtime.GOOS == "darwin" && runtime.GOARCH == "arm64" {
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t.Skip("the iOS exec wrapper is unable to properly handle the panic from Add")
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}
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sum.i = 0
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C.doAdd(10, 6)
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want := 10 * (10 - 1) / 2 * 6
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if sum.i != want {
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t.Fatalf("sum=%d, want %d", sum.i, want)
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}
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}
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// issue 1328
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//export BackIntoGo
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func BackIntoGo() {
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x := 1
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for i := 0; i < 10000; i++ {
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xvariadic(x)
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if x != 1 {
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panic("x is not 1?")
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}
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}
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}
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func xvariadic(x ...interface{}) {
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}
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func test1328(t *testing.T) {
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C.IntoC()
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}
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// issue 1560
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var sleepDone = make(chan int64)
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// parallelSleep returns the absolute difference between the start time
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// of the two sleeps.
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func parallelSleep(n int) int64 {
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t := int64(C.twoSleep(C.int(n))) - <-sleepDone
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if t < 0 {
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return -t
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}
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return t
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}
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//export BackgroundSleep
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func BackgroundSleep(n int32) {
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go func() {
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sleepDone <- int64(C.mysleep(C.int(n)))
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}()
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}
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func testParallelSleep(t *testing.T) {
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sleepSec := 1
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dt := time.Duration(parallelSleep(sleepSec)) * time.Millisecond
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t.Logf("difference in start time for two sleep(%d) is %v", sleepSec, dt)
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// bug used to run sleeps in serial, producing a 2*sleepSec-second delay.
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// we detect if the start times of those sleeps are > 0.5*sleepSec-second.
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if dt >= time.Duration(sleepSec)*time.Second/2 {
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t.Fatalf("parallel %d-second sleeps slept for %f seconds", sleepSec, dt.Seconds())
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}
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}
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// issue 2462
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//export exportbyte
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func exportbyte() byte {
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return 0
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}
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//export exportbool
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func exportbool() bool {
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return false
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}
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//export exportrune
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func exportrune() rune {
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return 0
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}
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//export exporterror
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func exporterror() error {
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return nil
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}
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//export exportint
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func exportint() int {
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return 0
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}
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//export exportuint
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func exportuint() uint {
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return 0
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}
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//export exportuintptr
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func exportuintptr() uintptr {
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return (uintptr)(0)
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}
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//export exportint8
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func exportint8() int8 {
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return 0
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}
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//export exportuint8
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func exportuint8() uint8 {
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return 0
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}
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//export exportint16
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func exportint16() int16 {
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return 0
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}
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//export exportuint16
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func exportuint16() uint16 {
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return 0
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}
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//export exportint32
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func exportint32() int32 {
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return 0
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}
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//export exportuint32
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func exportuint32() uint32 {
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return 0
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}
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//export exportint64
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func exportint64() int64 {
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return 0
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}
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//export exportuint64
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func exportuint64() uint64 {
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return 0
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}
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//export exportfloat32
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func exportfloat32() float32 {
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return 0
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}
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//export exportfloat64
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func exportfloat64() float64 {
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return 0
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}
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//export exportcomplex64
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func exportcomplex64() complex64 {
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return 0
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}
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//export exportcomplex128
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func exportcomplex128() complex128 {
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return 0
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}
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// issue 3741
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//export exportSliceIn
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func exportSliceIn(s []byte) bool {
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return len(s) == cap(s)
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}
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//export exportSliceOut
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func exportSliceOut() []byte {
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return []byte{1}
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}
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//export exportSliceInOut
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func exportSliceInOut(s []byte) []byte {
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return s
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}
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// issue 3775
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func init() {
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if runtime.GOOS == "android" {
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return
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}
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// Same as test3775 but run during init so that
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// there are two levels of internal runtime lock
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// (1 for init, 1 for cgo).
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// This would have been broken by CL 11663043.
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C.lockOSThreadC()
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}
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func test3775(t *testing.T) {
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if runtime.GOOS == "android" {
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return
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}
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// Used to panic because of the UnlockOSThread below.
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C.lockOSThreadC()
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}
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//export lockOSThreadCallback
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func lockOSThreadCallback() {
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runtime.LockOSThread()
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runtime.UnlockOSThread()
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go C.usleep(10000)
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runtime.Gosched()
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}
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// issue 4054 part 2 - part 1 in test.go
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var issue4054b = []int{C.A, C.B, C.C, C.D, C.E, C.F, C.G, C.H, C.II, C.J}
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//export issue5548FromC
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func issue5548FromC(s string, i int) int {
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if len(s) == 4 && s == "test" && i == 42 {
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return 12345
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}
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println("got", len(s), i)
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return 9876
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}
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func test5548(t *testing.T) {
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if x := C.issue5548_in_c(); x != 12345 {
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t.Errorf("issue5548_in_c = %d, want %d", x, 12345)
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}
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}
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// issue 6833
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//export GoIssue6833Func
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func GoIssue6833Func(aui uint, aui64 uint64) uint64 {
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return aui64 + uint64(aui)
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}
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func test6833(t *testing.T) {
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ui := 7
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ull := uint64(0x4000300020001000)
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v := uint64(C.issue6833Func(C.uint(ui), C.ulonglong(ull)))
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exp := uint64(ui) + ull
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if v != exp {
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t.Errorf("issue6833Func() returns %x, expected %x", v, exp)
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}
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}
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// issue 6907
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const CString = "C string"
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//export CheckIssue6907Go
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func CheckIssue6907Go(s string) C.int {
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if s == CString {
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return 1
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}
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return 0
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}
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func test6907Go(t *testing.T) {
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if got := C.CheckIssue6907C(CString); got != 1 {
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t.Errorf("C.CheckIssue6907C() == %d, want %d", got, 1)
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}
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}
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// issue 7665
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//export f7665
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func f7665() {}
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var bad7665 unsafe.Pointer = C.f7665
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var good7665 uintptr = uintptr(C.f7665)
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func test7665(t *testing.T) {
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if bad7665 == nil || uintptr(bad7665) != good7665 {
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t.Errorf("ptrs = %p, %#x, want same non-nil pointer", bad7665, good7665)
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}
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}
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// issue 7978
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var issue7978sync uint32
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func issue7978check(t *testing.T, wantFunc string, badFunc string, depth int) {
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runtime.GC()
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buf := make([]byte, 65536)
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trace := string(buf[:runtime.Stack(buf, true)])
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for _, goroutine := range strings.Split(trace, "\n\n") {
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if strings.Contains(goroutine, "test.issue7978go") {
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trace := strings.Split(goroutine, "\n")
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// look for the expected function in the stack
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for i := 0; i < depth; i++ {
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if badFunc != "" && strings.Contains(trace[1+2*i], badFunc) {
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t.Errorf("bad stack: found %s in the stack:\n%s", badFunc, goroutine)
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return
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}
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if strings.Contains(trace[1+2*i], wantFunc) {
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return
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}
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}
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t.Errorf("bad stack: didn't find %s in the stack:\n%s", wantFunc, goroutine)
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return
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}
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}
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t.Errorf("bad stack: goroutine not found. Full stack dump:\n%s", trace)
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}
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func issue7978wait(store uint32, wait uint32) {
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if store != 0 {
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atomic.StoreUint32(&issue7978sync, store)
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}
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for atomic.LoadUint32(&issue7978sync) != wait {
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runtime.Gosched()
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}
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}
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//export issue7978cb
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func issue7978cb() {
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// Force a stack growth from the callback to put extra
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// pressure on the runtime. See issue #17785.
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growStack(64)
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issue7978wait(3, 4)
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}
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func growStack(n int) int {
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var buf [128]int
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if n == 0 {
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return 0
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}
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return buf[growStack(n-1)]
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}
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func issue7978go() {
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C.issue7978c((*C.uint32_t)(&issue7978sync))
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issue7978wait(7, 8)
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}
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func test7978(t *testing.T) {
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if runtime.Compiler == "gccgo" {
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t.Skip("gccgo can not do stack traces of C code")
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}
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debug.SetTraceback("2")
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issue7978sync = 0
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go issue7978go()
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// test in c code, before callback
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issue7978wait(0, 1)
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issue7978check(t, "_Cfunc_issue7978c(", "", 1)
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// test in go code, during callback
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issue7978wait(2, 3)
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issue7978check(t, "test.issue7978cb(", "test.issue7978go", 3)
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// test in c code, after callback
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issue7978wait(4, 5)
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issue7978check(t, "_Cfunc_issue7978c(", "_cgoexpwrap", 1)
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// test in go code, after return from cgo
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issue7978wait(6, 7)
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issue7978check(t, "test.issue7978go(", "", 3)
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atomic.StoreUint32(&issue7978sync, 8)
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}
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// issue 8331 part 2
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var issue8331Var C.issue8331
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// issue 8945
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//export Test8945
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func Test8945() {
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_ = C.func8945
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}
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// issue 20910
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//export multi
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func multi() (*C.char, C.int) {
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return C.CString("multi"), 0
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}
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func test20910(t *testing.T) {
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C.callMulti()
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}
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// issue 28772 part 2
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const issue28772Constant2 = C.issue28772Constant2
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// issue 31891
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//export useIssue31891A
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func useIssue31891A(c *C.Issue31891A) {}
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//export useIssue31891B
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func useIssue31891B(c *C.Issue31891B) {}
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func test31891(t *testing.T) {
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C.callIssue31891()
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}
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// issue 38408
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// A typedef pointer can be used as the element type.
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// No runtime test; just make sure it compiles.
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var _ C.PIssue38408 = &C.Issue38408{i: 1}
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