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FreeTDM: Move custom backtrace code into ftdm_backtrace_walk() and helper functions.

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Portability fix for uClibc and other (linux) environments that lack execinfo.h.

ftdm_backtrace_walk() and related return FTDM_NOTIMPL and print a message
if backtraces are not available in the current environment.

Signed-off-by: Stefan Knoblich <stkn@openisdn.net>
This commit is contained in:
Stefan Knoblich
2012-07-11 17:21:49 +02:00
parent 91236c9ad3
commit 61cfafe6c2
6 changed files with 132 additions and 26 deletions
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libs/freetdm/src/ftdm_backtrace.c
+75
View File
@@ -0,0 +1,75 @@
/*
*
*
*/
#define _BSD_SOURCE
#include "private/ftdm_core.h"
#ifdef HAVE_EXECINFO_H
#include <stdlib.h>
#include <unistd.h>
#include <execinfo.h>
#include <syscall.h>
#define FTDM_BACKTRACE_MAX 50
FT_DECLARE(ftdm_status_t) ftdm_backtrace_walk(void (* callback)(const int tid, const void *addr, const char *symbol, void *priv), void *priv)
{
void *stacktrace[FTDM_BACKTRACE_MAX];
char **symbols = NULL;
size_t size = 0;
pid_t tid = 0;
int si = 0;
if (!callback) {
return FTDM_EINVAL;
}
tid = syscall(SYS_gettid);
size = backtrace(stacktrace, ftdm_array_len(stacktrace));
symbols = backtrace_symbols(stacktrace, size);
for (si = 0; si < size; si++) {
callback(tid, stacktrace[si], symbols[si], priv);
}
free(symbols);
return FTDM_SUCCESS;
}
#else /* !HAVE_EXECINFO_H */
FT_DECLARE(ftdm_status_t) ftdm_backtrace_walk(void (* callback)(const int tid, const void *addr, const char *symbol, void *priv), void *priv)
{
ftdm_log(FTDM_LOG_DEBUG, "Stack traces are not available on this platform!\n");
return FTDM_NOTIMPL;
}
#endif
static void span_backtrace(const int tid, const void *addr, const char *symbol, void *priv)
{
ftdm_span_t *span = priv;
ftdm_log(FTDM_LOG_DEBUG, "[%d][tid:%d] %p -> %s\n",
ftdm_span_get_id(span), tid, addr, symbol);
}
FT_DECLARE(ftdm_status_t) ftdm_backtrace_span(ftdm_span_t *span)
{
return ftdm_backtrace_walk(&span_backtrace, span);
}
static void chan_backtrace(const int tid, const void *addr, const char *symbol, void *priv)
{
ftdm_channel_t *chan = priv;
ftdm_log(FTDM_LOG_DEBUG, "[%d:%d][tid:%d] %p -> %s\n",
ftdm_channel_get_span_id(chan), ftdm_channel_get_id(chan), tid, addr, symbol);
}
FT_DECLARE(ftdm_status_t) ftdm_backtrace_chan(ftdm_channel_t *chan)
{
return ftdm_backtrace_walk(&chan_backtrace, chan);
}