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| // 头文件 backtraceplus.h #ifndef BACKTRACEPLUS_H #define BACKTRACEPLUS_H
class CBackTracer { public: CBackTracer() {} CBackTracer(const char* name, int sig); // argv[0] SIGSEGV ~CBackTracer() {}
void Setup(const char* name, int sig); private: };
#endif
// 实现文件 backtraceplus.cpp #include <execinfo.h> #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <string.h> #include <errno.h> #include <signal.h>
#include "backtraceplus.h"
// 程序名,用于输出函数行号 static char g_exeName[256] = {0};
// 不能作为了类成员 void fault_trap(int sig, siginfo_t * siginfo, void *myact) { printf("Catch SegmentFault!!\n");
void *array[10] = { 0 }; int num = backtrace(array, 10); char **calls = backtrace_symbols(array, num);
for (int i = 0; i < num; i++) { char *symbol = calls[i];
char addr[64] = { 0 }; char *p = strstr(symbol, "[0x"); snprintf(addr, sizeof(addr), p + 1); *(addr + strlen(addr) - 1) = 0;
char cmd[64] = { 0 }; snprintf(cmd, sizeof(cmd), "addr2line %s -s -e %s", addr, g_exeName);
FILE *fp = popen(cmd, "r");
char buf[256] = { 0 }; fread(buf, sizeof(buf), sizeof(char), fp);
printf("%s %s", symbol, buf);
pclose(fp); fp = NULL; }
exit(0); }
CBackTracer::CBackTracer(const char* name, int sig) { Setup(name, sig); }
void CBackTracer::Setup(const char* name, int sig) { strncpy(g_exeName, name, sizeof(g_exeName));
struct sigaction act; sigemptyset(&act.sa_mask); act.sa_flags = SA_SIGINFO; act.sa_sigaction = fault_trap; sigaction(sig, &act, NULL); }
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