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@ -1059,9 +1059,80 @@ int buffer_to_upper(buffer *b) {
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return 0;
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}
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#ifdef HAVE_LIBUNWIND
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# define UNW_LOCAL_ONLY
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# include <libunwind.h>
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void print_backtrace(FILE *file) {
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unw_cursor_t cursor;
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unw_context_t context;
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int ret;
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unsigned int frame = 0;
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if (0 != (ret = unw_getcontext(&context))) goto error;
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if (0 != (ret = unw_init_local(&cursor, &context))) goto error;
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fprintf(file, "Backtrace:\n");
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while (0 < (ret = unw_step(&cursor))) {
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unw_word_t proc_ip = 0;
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unw_proc_info_t procinfo;
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char procname[256];
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unw_word_t proc_offset = 0;
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if (0 != (ret = unw_get_reg(&cursor, UNW_REG_IP, &proc_ip))) goto error;
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if (0 == proc_ip) {
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/* without an IP the other functions are useless; unw_get_proc_name would return UNW_EUNSPEC */
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++frame;
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fprintf(file, "%u: (nil)\n", frame);
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continue;
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}
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if (0 != (ret = unw_get_proc_info(&cursor, &procinfo))) goto error;
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if (0 != (ret = unw_get_proc_name(&cursor, procname, sizeof(procname), &proc_offset))) {
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switch (-ret) {
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case UNW_ENOMEM:
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memset(procname + sizeof(procname) - 4, '.', 3);
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procname[sizeof(procname) - 1] = '\0';
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break;
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case UNW_ENOINFO:
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procname[0] = '?';
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procname[1] = '\0';
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proc_offset = 0;
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break;
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default:
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snprintf(procname, sizeof(procname), "?? (unw_get_proc_name error %d)", -ret);
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break;
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}
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}
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++frame;
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fprintf(file, "%u: %s (+0x%x) [%p]\n",
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frame,
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procname,
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(unsigned int) proc_offset,
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(void*)(uintptr_t)proc_ip);
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}
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if (0 != ret) goto error;
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return;
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error:
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fprintf(file, "Error while generating backtrace: unwind error %i\n", (int) -ret);
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}
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#else
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void print_backtrace(FILE *file) {
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UNUSED(file);
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}
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#endif
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void log_failed_assert(const char *filename, unsigned int line, const char *msg) {
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/* can't use buffer here; could lead to recursive assertions */
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fprintf(stderr, "%s.%d: %s\n", filename, line, msg);
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print_backtrace(stderr);
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fflush(stderr);
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abort();
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}
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