1 /*
2 * Copyright (C) 2015 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * * Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in
12 * the documentation and/or other materials provided with the
13 * distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29 #include <stdint.h>
30
31 #include "Config.h"
32 #include "DebugData.h"
33 #include "GuardData.h"
34 #include "LogAllocatorStats.h"
35 #include "PointerData.h"
36 #include "debug_disable.h"
37 #include "malloc_debug.h"
38
Initialize(const char * options)39 bool DebugData::Initialize(const char* options) {
40 if (!config_.Init(options)) {
41 return false;
42 }
43
44 // Check to see if the options that require a header are enabled.
45 if (config_.options() & HEADER_OPTIONS) {
46 // Initialize all of the static header offsets.
47 pointer_offset_ = __BIONIC_ALIGN(sizeof(Header), MINIMUM_ALIGNMENT_BYTES);
48
49 if (config_.options() & FRONT_GUARD) {
50 front_guard.reset(new FrontGuardData(this, config_, &pointer_offset_));
51 }
52
53 extra_bytes_ = pointer_offset_;
54
55 // Initialize all of the non-header data.
56 if (config_.options() & REAR_GUARD) {
57 rear_guard.reset(new RearGuardData(this, config_));
58 extra_bytes_ += config_.rear_guard_bytes();
59 }
60 }
61
62 if (TrackPointers()) {
63 pointer.reset(new PointerData(this));
64 if (!pointer->Initialize(config_)) {
65 return false;
66 }
67 }
68
69 if (config_.options() & RECORD_ALLOCS) {
70 record.reset(new RecordData());
71 if (!record->Initialize(config_)) {
72 return false;
73 }
74 }
75
76 if (config_.options() & EXPAND_ALLOC) {
77 extra_bytes_ += config_.expand_alloc_bytes();
78 }
79
80 if (config_.options() & LOG_ALLOCATOR_STATS_ON_SIGNAL) {
81 if (!LogAllocatorStats::Initialize(config_)) {
82 return false;
83 }
84 }
85
86 return true;
87 }
88
PrepareFork()89 void DebugData::PrepareFork() {
90 if (pointer != nullptr) {
91 pointer->PrepareFork();
92 }
93 }
94
PostForkParent()95 void DebugData::PostForkParent() {
96 if (pointer != nullptr) {
97 pointer->PostForkParent();
98 }
99 }
100
PostForkChild()101 void DebugData::PostForkChild() {
102 if (pointer != nullptr) {
103 pointer->PostForkChild();
104 }
105 }
106