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leaks tracer: log alive objects when receiving SIGUSR1

Browse source 
We don't want to automatically catch signals so use an env variable to
enable this feature.

https://bugzilla.gnome.org/show_bug.cgi?id=767857
This commit is contained in:
Guillaume Desmottes 2016-05-31 16:56:26 +02:00 committed by Sebastian Dröge
parent 528fbfe7c1
commit 53d2e8c977
3 changed files with 52 additions and 0 deletions
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7
configure.ac
View file

@ -719,6 +719,13 @@ fi
AC_SUBST(GST_HAVE_POSIX_TIMERS_DEFINE)
AM_CONDITIONAL(GST_HAVE_POSIX_TIMERS, test "$gst_cv_posix_timers" = "yes")
dnl Check for posix signals
AC_CHECK_FUNC(signal, [
AC_CHECK_HEADERS([signal.h], [
AC_DEFINE(HAVE_POSIX_SIGNALS,1,[Have posix signals])
], [], [])
])
AC_CACHE_CHECK(for monotonic clock, gst_cv_monotonic_clock,
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <time.h>

2
docs/design/part-tracing.txt
View file

@ -264,6 +264,8 @@ leaks
-----
- track creation/destruction of GstObject and GstMiniObject
- log those which are still alive when app is exiting and raise an error if any
- Can also log alive object when receiving the SIGUSR1 signal if the
GST_LEAKS_TRACER_SIG env variable is defined.
User interfaces
===============

43
plugins/tracers/gstleaks.c
View file

@ -34,6 +34,10 @@
#include "gstleaks.h"
#ifdef HAVE_POSIX_SIGNALS
#include <signal.h>
#endif /* HAVE_POSIX_SIGNALS */
GST_DEBUG_CATEGORY_STATIC (gst_leaks_debug);
#define GST_CAT_DEFAULT gst_leaks_debug
@ -44,6 +48,7 @@ G_DEFINE_TYPE_WITH_CODE (GstLeaksTracer, gst_leaks_tracer,
GST_TYPE_TRACER, _do_init);
static GstTracerRecord *tr_alive;
static GQueue instances = G_QUEUE_INIT;
static void
set_filtering (GstLeaksTracer * self)
@ -162,6 +167,8 @@ static void
gst_leaks_tracer_init (GstLeaksTracer * self)
{
self->objects = g_hash_table_new (NULL, NULL);
g_queue_push_tail (&instances, self);
}
static void
@ -304,6 +311,8 @@ gst_leaks_tracer_finalize (GObject * object)
if (self->filter)
g_array_free (self->filter, TRUE);
g_queue_remove (&instances, self);
if (leaks)
g_warning ("Leaks detected");
@ -332,6 +341,32 @@ gst_leaks_tracer_finalize (GObject * object)
"related-to", GST_TYPE_TRACER_VALUE_SCOPE, GST_TRACER_VALUE_SCOPE_PROCESS, \
NULL)
#ifdef HAVE_POSIX_SIGNALS
static void
sig_usr1_handler_foreach (gpointer data, gpointer user_data)
{
GstLeaksTracer *tracer = data;
GST_OBJECT_LOCK (tracer);
GST_TRACE_OBJECT (tracer, "start listing currently alive objects");
log_leaked (tracer);
GST_TRACE_OBJECT (tracer, "done listing currently alive objects");
GST_OBJECT_UNLOCK (tracer);
}
static void
sig_usr1_handler (G_GNUC_UNUSED int signal)
{
g_queue_foreach (&instances, sig_usr1_handler_foreach, NULL);
}
static void
setup_signals (void)
{
signal (SIGUSR1, sig_usr1_handler);
}
#endif /* HAVE_POSIX_SIGNALS */
static void
gst_leaks_tracer_class_init (GstLeaksTracerClass * klass)
{
@ -344,4 +379,12 @@ gst_leaks_tracer_class_init (GstLeaksTracerClass * klass)
RECORD_FIELD_TYPE_NAME, RECORD_FIELD_ADDRESS, RECORD_FIELD_DESC,
RECORD_FIELD_REF_COUNT, NULL);
GST_OBJECT_FLAG_SET (tr_alive, GST_OBJECT_FLAG_MAY_BE_LEAKED);
if (g_getenv ("GST_LEAKS_TRACER_SIG")) {
#ifdef HAVE_POSIX_SIGNALS
setup_signals ();
#else
g_warning ("System doesn't support POSIX signals");
#endif /* HAVE_POSIX_SIGNALS */
}
}