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Nicer, human readanle, stack trace output

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Erik Hofman 2017-01-30 15:58:09 +01:00
parent 57dc778565
commit e39eac8a6d
1 changed files with 37 additions and 11 deletions
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50
src/Main/bootstrap.cxx
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@ -139,23 +139,49 @@ int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance,
#if defined(__GNUC__) #if defined(__GNUC__)
#include <execinfo.h> #include <execinfo.h>
void segfault_handler(int sig) { #include <cxxabi.h>
void segfault_handler(int signo) {
void *array[128]; void *array[128];
size_t size, i; size_t size;
char** strs;
fprintf(stderr, "Error: caught signal %d:\n", signo);
// get void*'s for all entries on the stack
size = backtrace(array, 128); size = backtrace(array, 128);
if (size) {
char** list = backtrace_symbols(array, size);
size_t fnlen = 256;
char* fname = (char*)malloc(fnlen);
// print out all the frames to stderr for (size_t i=1; i<size; i++) {
fprintf(stderr, "Error: signal %d:\n", sig); char *begin = 0, *offset = 0, *end = 0;
backtrace_symbols_fd(array, size, STDERR_FILENO); for (char *p = list[i]; *p; ++p) {
if (*p == '(') begin = p;
strs = backtrace_symbols(array, size); else if (*p == '+') offset = p;
for (i=0; i<size; ++i) { else if (*p == ')' && offset) {
printf(" %s\n", strs[i]); end = p;
break;
}
}
if (begin && offset && end && begin<offset) {
*begin++ = '\0'; *offset++ = '\0'; *end = '\0';
int status;
char* ret = abi::__cxa_demangle(begin, fname, &fnlen, &status);
if (status == 0) {
fname = ret;
fprintf(stderr, " %s : %s+%s\n", list[i], fname, offset);
}
else
fprintf(stderr, " %s : %s()+%s\n", list[i], begin, offset);
}
else
fprintf(stderr, " %s\n", list[i]);
}
free(fname);
free(list);
} }
free(strs);
exit(1); exit(1);
} }