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// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc. All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// 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.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// 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.
// This file exists for testing allocation behavior when using arenas by hooking
// new/delete. It is a copy of //experimental/mvels/util/new_delete_capture.cc.
#include <google/protobuf/new_delete_capture.h>
#include <pthread.h>
#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/malloc_hook.h>
#include <google/protobuf/stubs/spinlock.h>
namespace google {
namespace {
pthread_t gthread;
protobuf_unittest::NewDeleteCapture *ghooked_instance = NULL;
SpinLock gspinlock(base::LINKER_INITIALIZED);
} // namespace
namespace protobuf_unittest {
NewDeleteCapture::NewDeleteCapture()
: alloc_count_(0),
alloc_size_(0),
alloc_ptr_(NULL),
free_count_(0),
free_ptr_(NULL) {}
NewDeleteCapture::~NewDeleteCapture() { Unhook(); }
void NewDeleteCapture::Reset() {
alloc_count_ = 0;
alloc_size_ = 0;
free_count_ = 0;
alloc_ptr_ = NULL;
free_ptr_ = NULL;
}
bool NewDeleteCapture::Hook(bool reset) {
SpinLockHolder spinlock(&gspinlock);
if (ghooked_instance != this) {
GOOGLE_CHECK(ghooked_instance == NULL)
<< " NewDeleteCapture can have only 1 active instance";
GOOGLE_CHECK(MallocHook::AddNewHook(NewHook));
GOOGLE_CHECK(MallocHook::AddDeleteHook(DeleteHook));
gthread = pthread_self();
ghooked_instance = this;
if (reset) {
Reset();
}
return true;
}
return false;
}
bool NewDeleteCapture::Unhook() {
SpinLockHolder spinlock(&gspinlock);
if (ghooked_instance == this) {
gthread = pthread_t();
ghooked_instance = NULL;
GOOGLE_CHECK(MallocHook::RemoveDeleteHook(DeleteHook));
GOOGLE_CHECK(MallocHook::RemoveNewHook(NewHook));
return true;
}
return false;
}
void NewDeleteCapture::NewHook(const void *ptr, size_t size) {
SpinLockHolder spinlock(&gspinlock);
if (gthread == pthread_self()) {
auto &rthis = *ghooked_instance;
if (++rthis.alloc_count_ == 1) {
rthis.alloc_size_ = size;
rthis.alloc_ptr_ = ptr;
}
}
}
void NewDeleteCapture::DeleteHook(const void *ptr) {
SpinLockHolder spinlock(&gspinlock);
if (gthread == pthread_self()) {
auto &rthis = *ghooked_instance;
if (++rthis.free_count_ == 1) {
rthis.free_ptr_ = ptr;
}
}
}
} // namespace protobuf_unittest
} // namespace google
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