Repo created

TMessagesProj/jni/voip/webrtc/base/process/memory.cc

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+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "base/process/memory.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif  // defined(OS_WIN)
+
+#include "base/debug/alias.h"
+#include "base/logging.h"
+#include "base/partition_alloc_buildflags.h"
+#if BUILDFLAG(USE_PARTITION_ALLOC)
+#include "base/allocator/partition_allocator/page_allocator.h"
+#endif
+#include "build/build_config.h"
+
+namespace base {
+
+namespace internal {
+
+NOINLINE void OnNoMemoryInternal(size_t size) {
+#if defined(OS_WIN)
+  // Kill the process. This is important for security since most of code
+  // does not check the result of memory allocation.
+  // https://msdn.microsoft.com/en-us/library/het71c37.aspx
+  // Pass the size of the failed request in an exception argument.
+  ULONG_PTR exception_args[] = {size};
+  ::RaiseException(base::win::kOomExceptionCode, EXCEPTION_NONCONTINUABLE,
+                   base::size(exception_args), exception_args);
+
+  // Safety check, make sure process exits here.
+  _exit(win::kOomExceptionCode);
+#else
+  size_t tmp_size = size;
+  base::debug::Alias(&tmp_size);
+  LOG(FATAL) << "Out of memory. size=" << tmp_size;
+#endif  // defined(OS_WIN)
+}
+
+}  // namespace internal
+
+// Defined in memory_win.cc for Windows.
+#if !defined(OS_WIN)
+
+namespace {
+
+// Breakpad server classifies base::`anonymous namespace'::OnNoMemory as
+// out-of-memory crash.
+NOINLINE void OnNoMemory(size_t size) {
+  internal::OnNoMemoryInternal(size);
+}
+
+}  // namespace
+
+void TerminateBecauseOutOfMemory(size_t size) {
+  OnNoMemory(size);
+}
+
+#endif  // !defined(OS_WIN)
+
+// Defined in memory_mac.mm for Mac.
+#if !defined(OS_MACOSX)
+
+bool UncheckedCalloc(size_t num_items, size_t size, void** result) {
+  const size_t alloc_size = num_items * size;
+
+  // Overflow check
+  if (size && ((alloc_size / size) != num_items)) {
+    *result = nullptr;
+    return false;
+  }
+
+  if (!UncheckedMalloc(alloc_size, result))
+    return false;
+
+  memset(*result, 0, alloc_size);
+  return true;
+}
+
+#endif  // defined(OS_MACOSX)
+
+namespace internal {
+bool ReleaseAddressSpaceReservation() {
+#if BUILDFLAG(USE_PARTITION_ALLOC)
+  return ReleaseReservation();
+#else
+  return false;
+#endif
+}
+}  // namespace internal
+
+}  // namespace base