go catchpanic 源码
golang catchpanic 代码
文件路径：/src/runtime/testdata/testprogcgo/catchpanic.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
package main
/*
#include <signal.h>
#include <stdlib.h>
#include <string.h>
static void abrthandler(int signum) {
if (signum == SIGABRT) {
exit(0); // success
}
}
void registerAbortHandler() {
struct sigaction act;
memset(&act, 0, sizeof act);
act.sa_handler = abrthandler;
sigaction(SIGABRT, &act, NULL);
}
static void __attribute__ ((constructor)) sigsetup(void) {
if (getenv("CGOCATCHPANIC_EARLY_HANDLER") == NULL)
return;
registerAbortHandler();
}
*/
import "C"
import "os"
func init() {
register("CgoCatchPanic", CgoCatchPanic)
}
// Test that the SIGABRT raised by panic can be caught by an early signal handler.
func CgoCatchPanic() {
if _, ok := os.LookupEnv("CGOCATCHPANIC_EARLY_HANDLER"); !ok {
C.registerAbortHandler()
}
panic("catch me")
}
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