X-Git-Url: http://git.lttng.org/?a=blobdiff_plain;ds=sidebyside;f=liblttng-ust-libc-wrapper%2Flttng-ust-malloc.c;h=54b40e6a0a9546cbada853974994ddaf8fdac82e;hb=1a37a8730e943967540944344da2f8bd1702d78e;hp=4b21c971516d54ce3a5eaac80e63e660f0f14f84;hpb=1ddceb368197a46bcc7bb40054cf3cd51a72840c;p=lttng-ust.git

diff --git a/liblttng-ust-libc-wrapper/lttng-ust-malloc.c b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
index 4b21c971..54b40e6a 100644
--- a/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
+++ b/liblttng-ust-libc-wrapper/lttng-ust-malloc.c
@@ -1,25 +1,16 @@
 /*
- * Copyright (C) 2009  Pierre-Marc Fournier
- * Copyright (C) 2011  Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * SPDX-License-Identifier: LGPL-2.1-or-later
  *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301 USA
+ * Copyright (C) 2009 Pierre-Marc Fournier
+ * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
  */
 
-#define _GNU_SOURCE
-#define _LGPL_SOURCE
-#include <lttng/ust-dlfcn.h>
+/*
+ * Do _not_ define _LGPL_SOURCE because we don't want to create a
+ * circular dependency loop between this malloc wrapper, liburcu and
+ * libc.
+ */
+#include <ust-dlfcn.h>
 #include <sys/types.h>
 #include <stdio.h>
 #include <assert.h>
@@ -28,8 +19,8 @@
 #include <urcu/compiler.h>
 #include <urcu/tls-compat.h>
 #include <urcu/arch.h>
-#include <lttng/align.h>
-#include <helper.h>
+#include <ust-helper.h>
+#include "ust-compat.h"
 
 #define TRACEPOINT_DEFINE
 #define TRACEPOINT_CREATE_PROBES
@@ -92,8 +83,8 @@ void ust_malloc_spin_unlock(pthread_mutex_t *lock)
 #define pthread_mutex_lock ust_malloc_spin_lock
 #define pthread_mutex_unlock ust_malloc_spin_unlock
 static DEFINE_URCU_TLS(int, malloc_nesting);
-#undef ust_malloc_spin_unlock
-#undef ust_malloc_spin_lock
+#undef pthread_mutex_unlock
+#undef pthread_mutex_lock
 #undef calloc
 
 /*
@@ -118,7 +109,7 @@ void *static_calloc_aligned(size_t nmemb, size_t size, size_t alignment)
 	res_offset = CMM_LOAD_SHARED(static_calloc_buf_offset);
 	do {
 		prev_offset = res_offset;
-		aligned_offset = ALIGN(prev_offset + sizeof(size_t), alignment);
+		aligned_offset = LTTNG_UST_ALIGN(prev_offset + sizeof(size_t), alignment);
 		new_offset = aligned_offset + nmemb * size;
 		if (new_offset > sizeof(static_calloc_buf)) {
 			abort();
@@ -417,13 +408,20 @@ int posix_memalign(void **memptr, size_t alignment, size_t size)
 	return retval;
 }
 
+static
+void lttng_ust_fixup_malloc_nesting_tls(void)
+{
+	asm volatile ("" : : "m" (URCU_TLS(malloc_nesting)));
+}
+
 __attribute__((constructor))
-void lttng_ust_malloc_wrapper_init(void)
+void lttng_ust_libc_wrapper_malloc_init(void)
 {
 	/* Initialization already done */
 	if (cur_alloc.calloc) {
 		return;
 	}
+	lttng_ust_fixup_malloc_nesting_tls();
 	/*
 	 * Ensure the allocator is in place before the process becomes
 	 * multithreaded.