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freetdm: print stack trace in sample ftdmload app

This commit is contained in:
Moises Silva 2010-05-12 15:51:06 -04:00
parent 3b0f1711ba
commit 3abdd9656f
1 changed files with 62 additions and 0 deletions
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62
libs/freetdm/sample/dso/ftdmload.c
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@ -1,7 +1,10 @@
#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
#include <freetdm.h>
#include <ftdm_dso.h>
#include <dlfcn.h>
#include <execinfo.h>
#define ARRLEN(obj) (sizeof(obj)/sizeof(obj[0]))
@ -12,6 +15,65 @@ struct dso_entry {
struct dso_entry loaded[10];
static void *(*real_dlopen)(const char *filename, int flag) = NULL;
static int (*real_dlclose)(void *handle) = NULL;
static void print_stack()
{
void *stacktrace[100];
char **symbols;
int size;
int i;
size = backtrace(stacktrace, ARRLEN(stacktrace));
symbols = backtrace_symbols(stacktrace, size);
if (!symbols) {
return;
}
for (i = 0; i < size; i++) {
ftdm_log(FTDM_LOG_DEBUG, "%s\n", symbols[i]);
}
free(symbols);
}
void *dlopen(const char *filename, int flag)
{
char *msg = NULL;
void *handle = NULL;
print_stack();
if (real_dlopen == NULL) {
dlerror();
real_dlopen = dlsym(RTLD_NEXT, "dlopen");
if ((msg = dlerror()) != NULL) {
fprintf(stderr, "dlsym failed: %s\n", msg);
exit(1);
}
fprintf(stderr, "Real dlopen at addr %p\n", real_dlopen);
}
handle = real_dlopen(filename, flag);
if (!handle) {
return NULL;
}
ftdm_log(FTDM_LOG_NOTICE, "Loaded %s with handle %p\n", filename, handle);
return handle;
}
int dlclose(void *handle)
{
char *msg = NULL;
print_stack();
if (real_dlclose == NULL) {
dlerror();
real_dlclose = dlsym(RTLD_NEXT, "dlclose");
if ((msg = dlerror()) != NULL) {
fprintf(stderr, "dlsym failed: %s\n", msg);
exit(1);
}
fprintf(stderr, "Real dlclose at addr %p\n", real_dlclose);
}
ftdm_log(FTDM_LOG_NOTICE, "Unloading %p\n", handle);
return real_dlclose(handle);
}
int load(char *name)
{
char path[255];