dart-sdk/runtime/bin/io_buffer.h
Alexander Markov c1212311bf [VM] Fix OOM handling when allocating buffers in dart:io
Reland 1d6c1020c9 with the fix for ASAN
bots.

* Test standalone_2/file_error_test is updated for Dart 2.0 fixed-size
  integers.

* This update revealed that certain dart:io native methods do not handle
  out-of-memory properly when I/O buffers are allocated.
  This CL fixes this bug.

* Updated test point is extracted to a separate test
  standalone_2/file_error2_test as it needs custom ASAN options.

Change-Id: Ifb1fa59828f36dc03d45c18a41d45da6b989d70a
Reviewed-on: https://dart-review.googlesource.com/20908
Reviewed-by: Zach Anderson <zra@google.com>
Commit-Queue: Alexander Markov <alexmarkov@google.com>
2017-11-15 18:06:31 +00:00

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// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
#ifndef RUNTIME_BIN_IO_BUFFER_H_
#define RUNTIME_BIN_IO_BUFFER_H_
#include "include/dart_api.h"
#include "platform/globals.h"
namespace dart {
namespace bin {
class IOBuffer {
public:
// Allocate an IO buffer dart object (of type Uint8List) backed by
// an external byte array.
static Dart_Handle Allocate(intptr_t size, uint8_t** buffer);
// Allocate IO buffer storage.
static uint8_t* Allocate(intptr_t size);
// Function for disposing of IO buffer storage. All backing storage
// for IO buffers must be freed using this function.
static void Free(void* buffer) { free(buffer); }
// Function for finalizing external byte arrays used as IO buffers.
static void Finalizer(void* isolate_callback_data,
Dart_WeakPersistentHandle handle,
void* buffer) {
Free(buffer);
}
private:
DISALLOW_ALLOCATION();
DISALLOW_IMPLICIT_CONSTRUCTORS(IOBuffer);
};
} // namespace bin
} // namespace dart
#endif // RUNTIME_BIN_IO_BUFFER_H_