X-Git-Url: http://git.lttng.org./?a=blobdiff_plain;f=libust%2Ftracepoint.c;h=a006f700cc18af292d3061e622b6fb1a9ba46f3b;hb=a5fd9b038fa5034ade759ca1338d2b93153ba217;hp=3bc5795afc17ce2f811e69015ac338b62ecd5519;hpb=b27f8e75a6e762ed01b889560431476516786d9f;p=lttng-ust.git

diff --git a/libust/tracepoint.c b/libust/tracepoint.c
index 3bc5795a..a006f700 100644
--- a/libust/tracepoint.c
+++ b/libust/tracepoint.c
@@ -27,16 +27,9 @@
 #include <ust/kcompat/kcompat.h>
 #include <urcu-bp.h>
 #include <urcu/hlist.h>
+#include <urcu/uatomic.h>
 
-#include "usterr_signal_safe.h"
-
-extern struct tracepoint * const __start___tracepoints_ptrs[]
-	__attribute__((visibility("hidden")));
-extern struct tracepoint * const __stop___tracepoints_ptrs[]
-	__attribute__((visibility("hidden")));
-
-static struct tracepoint * __tracepoint_ptr_dummy
-	__attribute__((used, section("__tracepoints_ptrs")));
+#include <ust/usterr-signal-safe.h>
 
 /* Set to 1 to enable tracepoint debug output */
 static const int tracepoint_debug;
@@ -637,6 +630,8 @@ int tracepoint_register_lib(struct tracepoint * const *tracepoints_start,
 {
 	struct tracepoint_lib *pl, *iter;
 
+	init_tracepoint();
+
 	pl = (struct tracepoint_lib *) zmalloc(sizeof(struct tracepoint_lib));
 
 	pl->tracepoints_start = tracepoints_start;
@@ -664,8 +659,8 @@ lib_added:
 	/* TODO: update just the loaded lib */
 	lib_update_tracepoints();
 
-	/* tracepoints_count - 1: skip dummy */
-	DBG("just registered a tracepoints section from %p and having %d tracepoints (minus dummy tracepoints)", tracepoints_start, tracepoints_count);
+	DBG("just registered a tracepoints section from %p and having %d tracepoints",
+		tracepoints_start, tracepoints_count);
 
 	return 0;
 }
@@ -688,17 +683,13 @@ int tracepoint_unregister_lib(struct tracepoint * const *tracepoints_start)
 	return 0;
 }
 
-void __attribute__((constructor)) init_tracepoint(void)
+void init_tracepoint(void)
 {
-	if (!initialized) {
-		tracepoint_register_lib(__start___tracepoints_ptrs,
-			__stop___tracepoints_ptrs
-			- __start___tracepoints_ptrs);
-		initialized = 1;
-	}
+	if (uatomic_xchg(&initialized, 1) == 1)
+		return;
+	init_usterr();
 }
 
-void __attribute__((destructor)) destroy_tracepoint(void)
+void exit_tracepoint(void)
 {
-	tracepoint_unregister_lib(__start___tracepoints_ptrs);
 }