From b74ceb25aae555570df64fa4d4076272733a9a20 Mon Sep 17 00:00:00 2001
From: Vladimir Chtchetkine <vchtchetkine@google.com>
Date: Tue, 17 Nov 2009 14:13:38 -0800
Subject: Split libc_debug.so into two .so modules loaded on demand from
 libc.so

This change is intended to eliminate need to replace libc.so with libc_debug.so in order to enablememory allocation debugging.
This is also the first step towards implementing extended memoryallocation debugging using emulator's capabilities in monitoring memory access.
---
 libc/bionic/malloc_debug_qemu.c | 81 +++++++++++++++++++++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 libc/bionic/malloc_debug_qemu.c

(limited to 'libc/bionic/malloc_debug_qemu.c')

diff --git a/libc/bionic/malloc_debug_qemu.c b/libc/bionic/malloc_debug_qemu.c
new file mode 100644
index 0000000..b63ddb4
--- /dev/null
+++ b/libc/bionic/malloc_debug_qemu.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
+ * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * Contains implementation of memeory allocation routines instrumented for
+ * usage in the emulator to detect memory allocation violations, such as
+ * memory leaks, buffer overruns, etc.
+ */
+
+#include <stdlib.h>
+#include <pthread.h>
+#include <unistd.h>
+#include "dlmalloc.h"
+#include "logd.h"
+
+// This file should be included into the build only when
+// MALLOC_QEMU_INSTRUMENT macro is defined.
+#ifndef MALLOC_QEMU_INSTRUMENT
+#error MALLOC_QEMU_INSTRUMENT is not defined.
+#endif  // MALLOC_QEMU_INSTRUMENT
+
+// =============================================================================
+// log functions
+// =============================================================================
+
+#define debug_log(format, ...)  \
+    __libc_android_log_print(ANDROID_LOG_DEBUG, "malloc_qemu", (format), ##__VA_ARGS__ )
+#define error_log(format, ...)  \
+    __libc_android_log_print(ANDROID_LOG_ERROR, "malloc_qemu", (format), ##__VA_ARGS__ )
+#define info_log(format, ...)  \
+    __libc_android_log_print(ANDROID_LOG_INFO, "malloc_qemu", (format), ##__VA_ARGS__ )
+
+void* qemu_instrumented_malloc(size_t bytes)
+{
+    return dlmalloc(bytes);
+}
+
+void  qemu_instrumented_free(void* mem)
+{
+    dlfree(mem);
+}
+
+void* qemu_instrumented_calloc(size_t n_elements, size_t elem_size)
+{
+    return dlcalloc(n_elements, elem_size);
+}
+
+void* qemu_instrumented_realloc(void* mem, size_t bytes)
+{
+    return dlrealloc(mem, bytes);
+}
+
+void* qemu_instrumented_memalign(size_t alignment, size_t bytes)
+{
+    return dlmemalign(alignment, bytes);
+}
-- 
cgit v1.1