unchecked_malloc() for Skia on OSX.

base/process_util.h

 // Copyright (c) 2012 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.
 
 // This file/namespace contains utility functions for enumerating, ending and
 // computing statistics of processes.
 
 #ifndef BASE_PROCESS_UTIL_H_
 #define BASE_PROCESS_UTIL_H_
 
@@ skipping 813 matching lines @@
 // Note: Returns true on Windows 2000 without doing anything.
 BASE_EXPORT bool EnableLowFragmentationHeap();
 
 // Enables 'terminate on heap corruption' flag. Helps protect against heap
 // overflow. Has no effect if the OS doesn't provide the necessary facility.
 BASE_EXPORT void EnableTerminationOnHeapCorruption();
 
 // Turns on process termination if memory runs out.
 BASE_EXPORT void EnableTerminationOnOutOfMemory();
 
-#if defined(OS_MACOSX)
-// Exposed for testing.
-BASE_EXPORT malloc_zone_t* GetPurgeableZone();
-#endif  // defined(OS_MACOSX)
-
 // Enables stack dump to console output on exception and signals.
 // When enabled, the process will quit immediately. This is meant to be used in
 // unit_tests only! This is not thread-safe: only call from main thread.
 BASE_EXPORT bool EnableInProcessStackDumping();
 
 // If supported on the platform, and the user has sufficent rights, increase
 // the current process's scheduling priority to a high priority.
 BASE_EXPORT void RaiseProcessToHighPriority();
 
 #if defined(OS_MACOSX)
 // Restore the default exception handler, setting it to Apple Crash Reporter
 // (ReportCrash).  When forking and execing a new process, the child will
 // inherit the parent's exception ports, which may be set to the Breakpad
 // instance running inside the parent.  The parent's Breakpad instance should
 // not handle the child's exceptions.  Calling RestoreDefaultExceptionHandler
 // in the child after forking will restore the standard exception handler.
 // See http://crbug.com/20371/ for more details.
 void RestoreDefaultExceptionHandler();
 #endif  // defined(OS_MACOSX)
 
+#if defined(OS_MACOSX)
+// Very large images or svg canvases can cause huge mallocs.  Skia
+// does tricks on tcmalloc-based systems to allow malloc to fail with
+// a NULL rather than hit the oom crasher.  This replicates that for
+// OSX.
+//
+// IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER,
+// YOUR CODE IS LIKELY TO BE REVERTED.  THANK YOU.
+//
+// TODO(shess): Weird place to put it, but this is where the OOM
+// killer currently lives.
+BASE_EXPORT void* unchecked_malloc(size_t size);

[Robert Sesek, 2012/09/13 23:18:15]

I only wonder if this should be named UncheckedMalloc.

[Mark Mentovai, 2012/09/17 18:28:11]

UncheckedMalloc.

Or UnsafeUncheckedMalloc.

+#endif  // defined(OS_MACOSX)
+
 }  // namespace base
 
 #endif  // BASE_PROCESS_UTIL_H_