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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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46
src/utils/trace.c Normal file
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/*
* Backtrace debugging
* Copyright (c) 2009, Jouni Malinen <j@w1.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*/
#include "includes.h"
#include "common.h"
#include "trace.h"
#ifdef WPA_TRACE
void wpa_trace_dump_func(const char *title, void **btrace, int btrace_num)
{
char **sym;
int i;
wpa_printf(MSG_INFO, "WPA_TRACE: %s - START", title);
sym = backtrace_symbols(btrace, btrace_num);
for (i = 0; i < btrace_num; i++)
wpa_printf(MSG_INFO, "[%d]: %p: %s",
i, btrace[i], sym ? sym[i] : "");
os_free(sym);
wpa_printf(MSG_INFO, "WPA_TRACE: %s - END", title);
}
void wpa_trace_show(const char *title)
{
struct info {
WPA_TRACE_INFO
} info;
wpa_trace_record(&info);
wpa_trace_dump(title, &info);
}
#endif /* WPA_TRACE */