2006-02-28 Andreas Tobler <a.tobler@schweiz.ch>

[pf3gnuchains/gcc-fork.git] / boehm-gc / pthread_support.c

diff --git a/boehm-gc/pthread_support.c b/boehm-gc/pthread_support.c
index 4271803..55872ef 100644 (file)
--- a/boehm-gc/pthread_support.c
+++ b/boehm-gc/pthread_support.c
@@ -47,6 +47,13 @@
 /*#define DEBUG_THREADS 1*/
 /*#define GC_ASSERTIONS*/
 
+#include "gc_config.h"
+
+#ifdef GC_PTHREAD_SYM_VERSION
+#define _GNU_SOURCE
+#include <dlfcn.h>
+#endif
+
 # include "gc.h"
 # include "private/pthread_support.h"
 
@@ -1193,8 +1200,37 @@ void * GC_start_routine(void * arg)
     return(result);
 }
 
+#ifdef GC_PTHREAD_SYM_VERSION
+
+/* Force constr to execute prior to main().  */
+static void constr (void) __attribute__ ((constructor));
+
+static int
+(*pthread_create_)(pthread_t *new_thread,
+                  const pthread_attr_t *attr_in,
+                  void * (*thread_execp)(void *), void *arg);
+
+static void
+constr (void)
+{
+  /* Get a pointer to the real pthread_create.  */
+  pthread_create_ = dlvsym (RTLD_NEXT, "pthread_create",
+                           GC_PTHREAD_SYM_VERSION);
+}
+
+#define GC_PTHREAD_CREATE_NAME pthread_create
+#define GC_PTHREAD_REAL_NAME (*pthread_create_)
+
+#else
+
+#define GC_PTHREAD_CREATE_NAME WRAP_FUNC(pthread_create)
+#define GC_PTHREAD_REAL_NAME REAL_FUNC(pthread_create)
+
+#endif
+
+
 int
-WRAP_FUNC(pthread_create)(pthread_t *new_thread,
+GC_PTHREAD_CREATE_NAME(pthread_t *new_thread,
                  const pthread_attr_t *attr,
                   void *(*start_routine)(void *), void *arg)
 {
@@ -1255,7 +1291,7 @@ WRAP_FUNC(pthread_create)(pthread_t *new_thread,
                   pthread_self());
 #   endif
 
-    result = REAL_FUNC(pthread_create)(new_thread, attr, GC_start_routine, si);
+    result = GC_PTHREAD_REAL_NAME(new_thread, attr, GC_start_routine, si);
 
 #   ifdef DEBUG_THREADS
         GC_printf1("Started thread 0x%X\n", *new_thread);