From 4911b107dae26150ec87cc31cada0e52f97061d6 Mon Sep 17 00:00:00 2001
From: Cedric Roux <cedric.roux@eurecom.fr>
Date: Sun, 1 May 2016 14:10:59 +0200
Subject: [PATCH] instrument X using gcc's -finstrument-functions
used to debug locking
---
common/utils/T/tracer/gui/Makefile | 3 +++
common/utils/T/tracer/gui/gui.c | 16 ++++++++++++++++
2 files changed, 19 insertions(+)
diff --git a/common/utils/T/tracer/gui/Makefile b/common/utils/T/tracer/gui/Makefile
index cc6a409e75..9552d03d82 100644
--- a/common/utils/T/tracer/gui/Makefile
+++ b/common/utils/T/tracer/gui/Makefile
@@ -10,6 +10,9 @@ gui.a: $(OBJS)
test: test.o gui.a
$(CC) -o test $(OBJS) test.o -lX11 -pthread -lm
+x.o:x.c
+ $(CC) $(CFLAGS) -o $@ -c $< -finstrument-functions
+
%.o: %.c
$(CC) $(CFLAGS) -o $@ -c $<
diff --git a/common/utils/T/tracer/gui/gui.c b/common/utils/T/tracer/gui/gui.c
index ef8640b0de..52e1b1cc74 100644
--- a/common/utils/T/tracer/gui/gui.c
+++ b/common/utils/T/tracer/gui/gui.c
@@ -5,15 +5,31 @@
#include <stdlib.h>
#include <pthread.h>
+static volatile int locked = 0;
+
+void __cyg_profile_func_enter (void *func, void *caller)
+{
+ if (locked == 0) abort();
+ printf("E %p %p %lu\n", func, caller, time(NULL));
+}
+
+void __cyg_profile_func_exit (void *func, void *caller)
+{
+ if (locked == 0) abort();
+ printf("X %p %p %lu\n", func, caller, time(NULL));
+}
+
void glock(gui *_gui)
{
struct gui *g = _gui;
if (pthread_mutex_lock(g->lock)) ERR("mutex error\n");
+ locked = 1;
}
void gunlock(gui *_gui)
{
struct gui *g = _gui;
+ locked = 0;
if (pthread_mutex_unlock(g->lock)) ERR("mutex error\n");
}
--
2.26.2