mirror of
https://gitee.com/acl-dev/acl.git
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129 lines
2.9 KiB
C
129 lines
2.9 KiB
C
#ifndef _GNU_SOURCE
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#define _GNU_SOURCE
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#endif
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#ifndef _XOPEN_SOURCE
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#define _XOPEN_SOURCE
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#endif
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#define NO_CPP_DEMANGLE
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#include <memory.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <signal.h>
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#include <ucontext.h>
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#include <dlfcn.h>
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#include <execinfo.h>
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#ifndef NO_CPP_DEMANGLE
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#include <cxxabi.h>
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#endif
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#include "sigsegv.h"
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#if defined(REG_RIP)
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# define SIGSEGV_STACK_IA64
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# define REGFORMAT "%016lx"
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#elif defined(REG_EIP)
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# define SIGSEGV_STACK_X86
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# define REGFORMAT "%08x"
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#else
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# define SIGSEGV_STACK_GENERIC
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# define REGFORMAT "%x"
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#endif
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static void signal_segv(int signum, siginfo_t* info, void*ptr)
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{
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static const char *si_codes[3] = {"", "SEGV_MAPERR", "SEGV_ACCERR"};
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size_t i;
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ucontext_t *ucontext = (ucontext_t*)ptr;
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#if defined(SIGSEGV_STACK_X86) || defined(SIGSEGV_STACK_IA64)
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int f = 0;
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Dl_info di;
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void **bp = 0;
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void *ip = 0;
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#else
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void *bt[20];
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char **strings;
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size_t sz;
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#endif
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fprintf(stderr, "Segmentation Fault!\n");
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fprintf(stderr, "info.si_signo = %d\n", signum);
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fprintf(stderr, "info.si_errno = %d\n", info->si_errno);
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fprintf(stderr, "info.si_code = %d (%s)\n", info->si_code,
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si_codes[info->si_code]);
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fprintf(stderr, "info.si_addr = %p\n", info->si_addr);
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for(i = 0; i < NGREG; i++)
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fprintf(stderr, "reg[%02d] = 0x" REGFORMAT "\n",
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(int) i, (unsigned long) ucontext->uc_mcontext.gregs[i]);
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#if defined(SIGSEGV_STACK_X86) || defined(SIGSEGV_STACK_IA64)
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# if defined(SIGSEGV_STACK_IA64)
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ip = (void*)ucontext->uc_mcontext.gregs[REG_RIP];
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bp = (void**)ucontext->uc_mcontext.gregs[REG_RBP];
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# elif defined(SIGSEGV_STACK_X86)
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ip = (void*)ucontext->uc_mcontext.gregs[REG_EIP];
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bp = (void**)ucontext->uc_mcontext.gregs[REG_EBP];
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# endif
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fprintf(stderr, "Stack trace:\n");
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while(bp && ip) {
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const char *symname;
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if(!dladdr(ip, &di))
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break;
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symname = di.dli_sname;
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#ifndef NO_CPP_DEMANGLE
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int status;
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char *tmp = __cxa_demangle(symname, NULL, 0, &status);
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if(status == 0 && tmp)
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symname = tmp;
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#endif
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fprintf(stderr, "%2d: %p <%s+%u> (%s)\n",
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++f,
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ip,
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symname,
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(unsigned)(((char*) ip) - ((char*) di.dli_saddr)),
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di.dli_fname);
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#ifndef NO_CPP_DEMANGLE
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if(tmp)
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free(tmp);
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#endif
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if(di.dli_sname && !strcmp(di.dli_sname, "main"))
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break;
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ip = bp[1];
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bp = (void**)bp[0];
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}
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#else
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fprintf(stderr, "Stack trace (non-dedicated):\n");
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sz = backtrace(bt, 20);
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strings = backtrace_symbols(bt, sz);
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for(i = 0; i < sz; ++i)
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fprintf(stderr, "%s\n", strings[i]);
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#endif
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fprintf(stderr, "End of stack trace\n");
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exit (-1);
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}
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int setup_sigsegv()
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{
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struct sigaction action;
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memset(&action, 0, sizeof(action));
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action.sa_sigaction = signal_segv;
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action.sa_flags = SA_SIGINFO;
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if(sigaction(SIGSEGV, &action, NULL) < 0) {
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perror("sigaction");
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return 0;
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}
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return 1;
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}
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