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Add backtrace support for debugging

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WPA_TRACE=y can now be used to enable internal backtrace support that
will provide more details about implementation errors, e.g., when some
resources are not released correctly. In addition, this will print out
a backtrace automatically if SIGSEGV is received.
This commit is contained in:
Jouni Malinen 2009-12-19 18:40:54 +02:00
parent f5d4a8ead4
commit 930f704aac
6 changed files with 118 additions and 0 deletions
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19
src/utils/eloop.c
View file

@ -15,6 +15,7 @@
#include "includes.h"
#include "common.h"
#include "trace.h"
#include "eloop.h"
@ -23,6 +24,7 @@ struct eloop_sock {
void *eloop_data;
void *user_data;
eloop_sock_handler handler;
WPA_TRACE_INFO
};
struct eloop_timeout {
@ -31,6 +33,7 @@ struct eloop_timeout {
void *user_data;
eloop_timeout_handler handler;
struct eloop_timeout *next;
WPA_TRACE_INFO
};
struct eloop_signal {
@ -69,10 +72,22 @@ struct eloop_data {
static struct eloop_data eloop;
#ifdef WPA_TRACE
static void eloop_sigsegv_handler(int sig)
{
wpa_trace_show("eloop SIGSEGV");
abort();
}
#endif /* WPA_TRACE */
int eloop_init(void *user_data)
{
os_memset(&eloop, 0, sizeof(eloop));
eloop.user_data = user_data;
#ifdef WPA_TRACE
signal(SIGSEGV, eloop_sigsegv_handler);
#endif /* WPA_TRACE */
return 0;
}
@ -96,6 +111,7 @@ static int eloop_sock_table_add_sock(struct eloop_sock_table *table,
tmp[table->count].eloop_data = eloop_data;
tmp[table->count].user_data = user_data;
tmp[table->count].handler = handler;
wpa_trace_record(&tmp[table->count]);
table->count++;
table->table = tmp;
if (sock > eloop.max_sock)
@ -177,6 +193,7 @@ static void eloop_sock_table_destroy(struct eloop_sock_table *table)
table->table[i].eloop_data,
table->table[i].user_data,
table->table[i].handler);
wpa_trace_dump("eloop sock", &table->table[i]);
}
os_free(table->table);
}
@ -256,6 +273,7 @@ int eloop_register_timeout(unsigned int secs, unsigned int usecs,
timeout->user_data = user_data;
timeout->handler = handler;
timeout->next = NULL;
wpa_trace_record(timeout);
if (eloop.timeout == NULL) {
eloop.timeout = timeout;
@ -543,6 +561,7 @@ void eloop_destroy(void)
"user_data=%p handler=%p\n",
sec, usec, prev->eloop_data, prev->user_data,
prev->handler);
wpa_trace_dump("eloop timeout", prev);
os_free(prev);
}
eloop_sock_table_destroy(&eloop.readers);