119 lines
2.6 KiB
C
119 lines
2.6 KiB
C
#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#include <stdio.h>
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#include <dlfcn.h>
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#include <stdlib.h>
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#include <signal.h>
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#include <unistd.h>
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#include <string.h>
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#include <ucontext.h>
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/* 纯C环境下，不定义宏NO_CPP_DEMANGLE */
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#if (!defined(__cplusplus)) && (!defined(NO_CPP_DEMANGLE))
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#define NO_CPP_DEMANGLE
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#endif
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#ifndef NO_CPP_DEMANGLE
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#include <cxxabi.h>
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#ifdef __cplusplus
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using __cxxabiv1::__cxa_demangle;
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#endif
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#endif
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#ifdef HAS_ULSLIB
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#include <uls/logger.h>
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#define sigsegv_outp(x) sigsegv_outp(, gx)
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#else
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#define sigsegv_outp(x, ...) fprintf(stderr, x"\n", ##__VA_ARGS__)
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#endif
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static void sigsegv_handler(int signo, siginfo_t *info, void *context)
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{
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sigsegv_outp("Segmentation Fault!");
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sigsegv_outp("info.si_signo = %d", signo);
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if (info) {
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sigsegv_outp("info.si_errno = %d", info->si_errno);
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sigsegv_outp("info.si_code = %d (%s)", info->si_code,
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(info->si_code == SEGV_MAPERR) ? "SEGV_MAPERR" : "SEGV_ACCERR");
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sigsegv_outp("info.si_addr = %p\n", info->si_addr);
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}
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int i = 0;
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Dl_info dl_info;
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const void *pc = __builtin_return_address(0);
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const void **fp = (const void **)__builtin_frame_address(1);
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sigsegv_outp("\nStack trace:");
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while (pc) {
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memset(&dl_info, 0, sizeof(Dl_info));
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if (!dladdr((void *)pc, &dl_info)) break;
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const char *sname = dl_info.dli_sname;
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#ifndef NO_CPP_DEMANGLE
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int status;
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char *tmp = __cxa_demangle(sname, NULL, 0, &status);
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if (status == 0 && tmp) {
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sname = tmp;
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}
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#endif
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/* No: return address <sym-name + offset> (filename) */
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sigsegv_outp("%02d: %p <%s + %lu> (%s)", ++i, pc, sname,
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(unsigned long)pc - (unsigned long)dl_info.dli_saddr, dl_info.dli_fname);
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#ifndef NO_CPP_DEMANGLE
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if (tmp) free(tmp);
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#endif
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if (sname && !strcmp(sname, "main")) break;
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if (!fp) break;
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#if (defined __x86_64__) || (defined __i386__)
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pc = fp[1];
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fp = (const void **)fp[0];
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#elif (defined __arm__)
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pc = fp[-1];
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fp = (const void **)fp[-3];
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#endif
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}
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sigsegv_outp("Stack trace end.");
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_exit(0);
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}
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#define SETSIG(sa, signo, func, flags) \
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do { \
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sa.sa_sigaction = func; \
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sa.sa_flags = flags; \
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sigemptyset(&sa.sa_mask); \
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sigaction(signo, &sa, NULL);\
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} while(0)
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static void __attribute((constructor)) setup_sigsegv(void)
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{
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struct sigaction sa;
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SETSIG(sa, SIGSEGV, sigsegv_handler, SA_SIGINFO);
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}
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#if 1
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void func3(void)
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{
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char *p = (char *)0x12345678;
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*p = 10;
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}
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void func2(void)
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{
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func3();
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}
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void func1(void)
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{
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func2();
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}
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int main(int argc, const char *argv[])
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{
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func1();
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exit(EXIT_SUCCESS);
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}
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#endif
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