turnidge@google.com
2803d78dfd
Instead of passing a size in bytes to the allocation function, we now have a templatized Alloc function: zone->Alloc<Type>(len) This is better for security, as we can check for integer overflow in the size computation before performing the allocation. Before, we often failed to check this. Review URL: https://chromiumcodereview.appspot.com//10836061 git-svn-id: https://dart.googlecode.com/svn/branches/bleeding_edge/dart@10254 260f80e4-7a28-3924-810f-c04153c831b5
65 lines
1.8 KiB
C++
65 lines
1.8 KiB
C++
// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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#include "vm/native_message_handler.h"
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#include "vm/dart_api_message.h"
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#include "vm/isolate.h"
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#include "vm/message.h"
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#include "vm/snapshot.h"
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#include "vm/thread.h"
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namespace dart {
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NativeMessageHandler::NativeMessageHandler(const char* name,
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Dart_NativeMessageHandler func)
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: name_(strdup(name)),
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func_(func) {
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// A NativeMessageHandler always has one live port.
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increment_live_ports();
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}
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NativeMessageHandler::~NativeMessageHandler() {
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free(name_);
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}
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#if defined(DEBUG)
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void NativeMessageHandler::CheckAccess() {
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ASSERT(Isolate::Current() == NULL);
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}
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#endif
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static uint8_t* zone_allocator(uint8_t* ptr,
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intptr_t old_size,
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intptr_t new_size) {
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ApiZone* zone = ApiNativeScope::Current()->zone();
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return zone->Realloc<uint8_t>(ptr, old_size, new_size);
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}
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bool NativeMessageHandler::HandleMessage(Message* message) {
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if (message->IsOOB()) {
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// We currently do not use OOB messages for native ports.
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UNREACHABLE();
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}
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// Enter a native scope for handling the message. This will create a
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// zone for allocating the objects for decoding the message.
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ApiNativeScope scope;
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int32_t length = reinterpret_cast<int32_t*>(
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message->data())[Snapshot::kLengthIndex];
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ApiMessageReader reader(message->data() + Snapshot::kHeaderSize,
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length,
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zone_allocator);
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Dart_CObject* object = reader.ReadMessage();
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(*func())(message->dest_port(), message->reply_port(), object);
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delete message;
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return true;
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}
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} // namespace dart
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