Home | History | Annotate | Download | only in malloc_debug 
      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 "PointerData.h"
     35 #include "debug_disable.h"
     36 #include "malloc_debug.h"
     37 
     38 bool DebugData::Initialize(const char* options) {
     39   if (!config_.Init(options)) {
     40     return false;
     41   }
     42 
     43   // Check to see if the options that require a header are enabled.
     44   if (config_.options() & HEADER_OPTIONS) {
     45     // Initialize all of the static header offsets.
     46     pointer_offset_ = __BIONIC_ALIGN(sizeof(Header), MINIMUM_ALIGNMENT_BYTES);
     47 
     48     if (config_.options() & FRONT_GUARD) {
     49       front_guard.reset(new FrontGuardData(this, config_, &pointer_offset_));
     50     }
     51 
     52     extra_bytes_ = pointer_offset_;
     53 
     54     // Initialize all of the non-header data.
     55     if (config_.options() & REAR_GUARD) {
     56       rear_guard.reset(new RearGuardData(this, config_));
     57       extra_bytes_ += config_.rear_guard_bytes();
     58     }
     59   }
     60 
     61   if (TrackPointers()) {
     62     pointer.reset(new PointerData(this));
     63     if (!pointer->Initialize(config_)) {
     64       return false;
     65     }
     66   }
     67 
     68   if (config_.options() & RECORD_ALLOCS) {
     69     record.reset(new RecordData());
     70     if (!record->Initialize(config_)) {
     71       return false;
     72     }
     73   }
     74 
     75   if (config_.options() & EXPAND_ALLOC) {
     76     extra_bytes_ += config_.expand_alloc_bytes();
     77   }
     78   return true;
     79 }
     80 
     81 void DebugData::PrepareFork() {
     82   if (pointer != nullptr) {
     83     pointer->PrepareFork();
     84   }
     85 }
     86 
     87 void DebugData::PostForkParent() {
     88   if (pointer != nullptr) {
     89     pointer->PostForkParent();
     90   }
     91 }
     92 
     93 void DebugData::PostForkChild() {
     94   if (pointer != nullptr) {
     95     pointer->PostForkChild();
     96   }
     97 }
     98