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info: Check libunwind return codes

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This commit is contained in:
Thibault Saunier 2017-01-26 16:35:27 +00:00
parent 5ef7a20687
commit 94da8f5d8d
1 changed files with 21 additions and 3 deletions
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24
gst/gstinfo.c
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@ -2661,6 +2661,7 @@ append_debug_info (GString * trace, Dwfl * dwfl, const void *ip)
static gchar *
generate_unwind_trace (GstStackTraceFlags flags)
{
gint unret;
unw_context_t uc;
unw_cursor_t cursor;
gboolean use_libunwind = TRUE;
@ -2677,15 +2678,31 @@ generate_unwind_trace (GstStackTraceFlags flags)
dwfl = dwfl_begin (&callbacks);
#endif /* HAVE_DW */
unw_getcontext (&uc);
unw_init_local (&cursor, &uc);
unret = unw_getcontext (&uc);
if (unret) {
GST_DEBUG ("Could not get libunwind context (%d)", unret);
goto done;
}
unret = unw_init_local (&cursor, &uc);
if (unret) {
GST_DEBUG ("Could not init libunwind context (%d)", unret);
goto done;
}
while (unw_step (&cursor) > 0) {
#ifdef HAVE_DW
if (dwfl) {
unw_word_t ip;
unw_get_reg (&cursor, UNW_REG_IP, &ip);
unret = unw_get_reg (&cursor, UNW_REG_IP, &ip);
if (unret) {
GST_DEBUG ("libunwind could read frame info (%d)", unret);
goto done;
}
if (append_debug_info (trace, dwfl, (void *) (ip - 4))) {
use_libunwind = FALSE;
g_string_append (trace, ")\n");
@ -2703,6 +2720,7 @@ generate_unwind_trace (GstStackTraceFlags flags)
}
}
done:
#ifdef HAVE_DW
if (dwfl)
dwfl_end (dwfl);