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glibc/debug/backtrace-tst.c
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#include <execinfo.h> | |
#include <inttypes.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <stdint.h> | |
static int | |
compare (const void *p1, const void *p2) | |
{ | |
void *ba[20]; | |
int n = backtrace (ba, sizeof (ba) / sizeof (ba[0])); | |
if (n != 0) | |
{ | |
char **names = backtrace_symbols (ba, n); | |
if (names != NULL) | |
{ | |
int i; | |
printf ("called from %s\n", names[0]); | |
for (i = 1; i < n; ++i) | |
printf (" %s\n", names[i]); | |
free (names); | |
} | |
} | |
return *(const uint32_t *) p1 - *(const uint32_t *) p2; | |
} | |
int | |
main (int argc, char *argv[]) | |
{ | |
uint32_t arr[20]; | |
size_t cnt; | |
for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt) | |
arr[cnt] = random (); | |
qsort (arr, sizeof (arr) / sizeof (arr[0]), sizeof (arr[0]), compare); | |
for (cnt = 0; cnt < sizeof (arr) / sizeof (arr[0]); ++cnt) | |
printf ("%" PRIx32 "\n", arr[cnt]); | |
return 0; | |
} |