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Current Path: /opt/golang/1.22.0/src/runtime/testdata/testprogcgo

opt / golang / 1.22.0 / src / runtime / testdata / testprogcgo /

📁 ..
📄 aprof.go(1.14 KB)
📄 aprof_c.c(217 B)
📄 bigstack1_windows.c(379 B)
📄 bigstack_windows.c(1.2 KB)
📄 bigstack_windows.go(586 B)
📄 bindm.c(692 B)
📄 bindm.go(1.2 KB)
📄 callback.go(1.86 KB)
📄 catchpanic.go(993 B)
📄 cgo.go(1.82 KB)
📄 cgonocallback.c(236 B)
📄 cgonocallback.go(629 B)
📄 cgonoescape.go(1.84 KB)
📄 crash.go(743 B)
📄 deadlock.go(509 B)
📄 destructor.c(459 B)
📄 destructor.go(442 B)
📄 dll_windows.go(459 B)
📄 dropm.go(1.05 KB)
📄 dropm_stub.go(336 B)
📄 eintr.go(5.17 KB)
📄 exec.go(2.1 KB)
📄 gprof.go(868 B)
📄 gprof_c.c(700 B)
📄 issue29707.go(1.15 KB)
📄 lockosthread.c(301 B)
📄 lockosthread.go(2.52 KB)
📄 main.go(651 B)
📄 needmdeadlock.go(1.83 KB)
📄 numgoroutine.go(1.91 KB)
📄 panic.c(239 B)
📄 panic.go(312 B)
📄 pprof.go(1.67 KB)
📄 pprof_callback.go(1.82 KB)
📄 raceprof.go(1.67 KB)
📄 racesig.go(1.67 KB)
📄 segv.go(525 B)
📄 segv_linux.go(546 B)
📄 sigfwd.go(1.58 KB)
📄 sigpanic.go(484 B)
📄 sigstack.go(2.09 KB)
📄 sigthrow.go(312 B)
📄 stack_windows.go(1.1 KB)
📄 stackswitch.c(3.88 KB)
📄 stackswitch.go(1.07 KB)
📄 threadpanic.go(428 B)
📄 threadpanic_unix.c(435 B)
📄 threadpanic_windows.c(435 B)
📄 threadpprof.go(2.54 KB)
📄 threadprof.go(2.41 KB)
📄 trace.go(1.15 KB)
📄 trace_unix.c(688 B)
📄 trace_windows.c(777 B)
📄 traceback.go(949 B)
📄 traceback_c.c(1.21 KB)
📄 tracebackctxt.go(2.85 KB)
📄 tracebackctxt_c.c(2.33 KB)
📁 windows

Editing: sigstack.go

// Copyright 2017 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.

//go:build !plan9 && !windows
// +build !plan9,!windows

// Test handling of Go-allocated signal stacks when calling from
// C-created threads with and without signal stacks. (See issue
// #22930.)

package main

/*
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/mman.h>

#ifdef _AIX
// On AIX, SIGSTKSZ is too small to handle Go sighandler.
#define CSIGSTKSZ 0x4000
#else
#define CSIGSTKSZ SIGSTKSZ
#endif

extern void SigStackCallback();

static void* WithSigStack(void* arg __attribute__((unused))) {
	// Set up an alternate system stack.
	void* base = mmap(0, CSIGSTKSZ, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
	if (base == MAP_FAILED) {
		perror("mmap failed");
		abort();
	}
	stack_t st = {}, ost = {};
	st.ss_sp = (char*)base;
	st.ss_flags = 0;
	st.ss_size = CSIGSTKSZ;
	if (sigaltstack(&st, &ost) < 0) {
		perror("sigaltstack failed");
		abort();
	}

// Call Go.
	SigStackCallback();

// Disable signal stack and protect it so we can detect reuse.
	if (ost.ss_flags & SS_DISABLE) {
		// Darwin libsystem has a bug where it checks ss_size
		// even if SS_DISABLE is set. (The kernel gets it right.)
		ost.ss_size = CSIGSTKSZ;
	}
	if (sigaltstack(&ost, NULL) < 0) {
		perror("sigaltstack restore failed");
		abort();
	}
	mprotect(base, CSIGSTKSZ, PROT_NONE);
	return NULL;
}

static void* WithoutSigStack(void* arg __attribute__((unused))) {
	SigStackCallback();
	return NULL;
}

static void DoThread(int sigstack) {
	pthread_t tid;
	if (sigstack) {
		pthread_create(&tid, NULL, WithSigStack, NULL);
	} else {
		pthread_create(&tid, NULL, WithoutSigStack, NULL);
	}
	pthread_join(tid, NULL);
}
*/
import "C"

func init() {
	register("SigStack", SigStack)
}

func SigStack() {
	C.DoThread(0)
	C.DoThread(1)
	C.DoThread(0)
	C.DoThread(1)
	println("OK")
}

var BadPtr *int

//export SigStackCallback
func SigStackCallback() {
	// Cause the Go signal handler to run.
	defer func() { recover() }()
	*BadPtr = 42
}

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Editing: sigstack.go

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