sigaction检测段错误示例

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#include <stdio.h>#include <setjmp.h>#include <signal.h>#include <string.h>#include <unistd.h>#include <stdlib.h>#include <execinfo.h>#define ARRAY_SIZE(a) sizeof(a)/sizeof(a[0])#define DEBUG#ifdef DEBUG#define LOG(fmt,args...) printf("%s():%d " fmt, __FUNCTION__, __LINE__, ##args)#else#define LOG(fmt,args...) #endifextern void dump_backtrace(void);

#include "common.h"void dump_backtrace(void){int j, nptrs;void *buffer[32];char **strings;nptrs = backtrace(buffer,  ARRAY_SIZE(buffer) );printf("backtrace() returned %d addresses:\n", nptrs);strings = backtrace_symbols(buffer, nptrs);if (NULL == strings){   perror("backtrace_symbols");   exit(-1);}for (j = 0; j < nptrs; j++){   printf("    %s\n", strings[j]);    }free(strings);}

#include "common.h"void test(){*((int*)0x04)  = 0;}void siginfo_handler(int signum, siginfo_t * siginfo, void * context){LOG("Signal Number: %d\n", signum);LOG("Address: %p\n", siginfo->si_addr);dump_backtrace();exit(-1);}int main(){int ret = 0;struct sigaction act;act.sa_flags = SA_SIGINFO;act.sa_sigaction = siginfo_handler;sigemptyset(&act.sa_mask);ret = sigaction(SIGSEGV, &act, NULL);if(0 != ret){perror("sigaction() failed");}test();return 0;}

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