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trace: Filter out uninteresting functions from backtrace

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This filters out the functions inside trace.c and functions before
main() since those are not relevant to the actual issue that is being
reported.
This commit is contained in:
Jouni Malinen 2009-12-22 01:29:15 +02:00
parent a6ff0e0810
commit 94caf8cd62
1 changed files with 36 additions and 0 deletions
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36
src/utils/trace.c
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@ -198,6 +198,25 @@ static void wpa_trace_bfd_addr(void *pc)
}
static const char * wpa_trace_bfd_addr2func(void *pc)
{
bfd *abfd = cached_abfd;
struct bfd_data data;
if (abfd == NULL)
return NULL;
data.pc = (bfd_vma) pc;
data.found = FALSE;
bfd_map_over_sections(abfd, find_addr_sect, &data);
if (!data.found)
return NULL;
return data.function;
}
static void wpa_trace_bfd_init(void)
{
if (!prg_fname) {
@ -226,6 +245,7 @@ static void wpa_trace_bfd_init(void)
#define wpa_trace_bfd_init() do { } while (0)
#define wpa_trace_bfd_addr(pc) do { } while (0)
#define wpa_trace_bfd_addr2func(pc) NULL
#endif /* WPA_TRACE_BFD */
@ -233,16 +253,32 @@ void wpa_trace_dump_func(const char *title, void **btrace, int btrace_num)
{
char **sym;
int i;
enum { TRACE_HEAD, TRACE_RELEVANT, TRACE_TAIL } state;
wpa_trace_bfd_init();
wpa_printf(MSG_INFO, "WPA_TRACE: %s - START", title);
sym = backtrace_symbols(btrace, btrace_num);
state = TRACE_HEAD;
for (i = 0; i < btrace_num; i++) {
const char *func = wpa_trace_bfd_addr2func(btrace[i]);
if (state == TRACE_HEAD && func &&
(os_strcmp(func, "wpa_trace_add_ref_func") == 0 ||
os_strcmp(func, "wpa_trace_check_ref") == 0 ||
os_strcmp(func, "wpa_trace_show") == 0))
continue;
if (state == TRACE_TAIL && sym && sym[i] &&
os_strstr(sym[i], "__libc_start_main"))
break;
if (state == TRACE_HEAD)
state = TRACE_RELEVANT;
if (sym)
wpa_printf(MSG_INFO, "[%d]: %s", i, sym[i]);
else
wpa_printf(MSG_INFO, "[%d]: ?? [%p]", i, btrace[i]);
wpa_trace_bfd_addr(btrace[i]);
if (state == TRACE_RELEVANT && func &&
os_strcmp(func, "main") == 0)
state = TRACE_TAIL;
}
free(sym);
wpa_printf(MSG_INFO, "WPA_TRACE: %s - END", title);