1 files changed, 121 insertions, 0 deletions
diff --git a/src/google/protobuf/new_delete_capture.cc b/src/google/protobuf/new_delete_capture.cc
new file mode 100644
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+++ b/src/google/protobuf/new_delete_capture.cc
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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