Import PartitionAlloc from Chromium.

We'll add callers in a later CL.

BUG=pdfium:678

Change-Id: I98c8b2832c4750df326218e24ee8c1bd33b89b50
Reviewed-on: https://pdfium-review.googlesource.com/3066
Commit-Queue: Tom Sepez <tsepez@chromium.org>
Reviewed-by: Tom Sepez <tsepez@chromium.org>

1 files changed, 37 insertions, 0 deletions

diff --git a/third_party/base/allocator/partition_allocator/oom.h b/third_party/base/allocator/partition_allocator/oom.h
new file mode 100644
index 0000000000..41f29b5642
--- /dev/null
+++ b/third_party/base/allocator/partition_allocator/oom.h
@@ -0,0 +1,37 @@
+// Copyright (c) 2016 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.
+
+#ifndef BASE_ALLOCATOR_OOM_H
+#define BASE_ALLOCATOR_OOM_H
+
+#include "third_party/base/logging.h"
+
+#if defined(OS_WIN)
+#include <windows.h>
+#endif
+
+// Do not want trivial entry points just calling OOM_CRASH() to be
+// commoned up by linker icf/comdat folding.
+#define OOM_CRASH_PREVENT_ICF()                  \
+  volatile int oom_crash_inhibit_icf = __LINE__; \
+  ALLOW_UNUSED_LOCAL(oom_crash_inhibit_icf)
+
+// OOM_CRASH() - Specialization of IMMEDIATE_CRASH which will raise a custom
+// exception on Windows to signal this is OOM and not a normal assert.
+#if defined(OS_WIN)
+#define OOM_CRASH()                                                     \
+  do {                                                                  \
+    OOM_CRASH_PREVENT_ICF();                                            \
+    ::RaiseException(0xE0000008, EXCEPTION_NONCONTINUABLE, 0, nullptr); \
+    IMMEDIATE_CRASH();                                                  \
+  } while (0)
+#else
+#define OOM_CRASH()          \
+  do {                       \
+    OOM_CRASH_PREVENT_ICF(); \
+    IMMEDIATE_CRASH();       \
+  } while (0)
+#endif
+
+#endif  // BASE_ALLOCATOR_OOM_H