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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 // This file/namespace contains utility functions for enumerating, ending and | 5 // This file/namespace contains utility functions for enumerating, ending and |
6 // computing statistics of processes. | 6 // computing statistics of processes. |
7 | 7 |
8 #ifndef BASE_PROCESS_UTIL_H_ | 8 #ifndef BASE_PROCESS_UTIL_H_ |
9 #define BASE_PROCESS_UTIL_H_ | 9 #define BASE_PROCESS_UTIL_H_ |
10 | 10 |
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835 // Note: Returns true on Windows 2000 without doing anything. | 835 // Note: Returns true on Windows 2000 without doing anything. |
836 BASE_EXPORT bool EnableLowFragmentationHeap(); | 836 BASE_EXPORT bool EnableLowFragmentationHeap(); |
837 | 837 |
838 // Enables 'terminate on heap corruption' flag. Helps protect against heap | 838 // Enables 'terminate on heap corruption' flag. Helps protect against heap |
839 // overflow. Has no effect if the OS doesn't provide the necessary facility. | 839 // overflow. Has no effect if the OS doesn't provide the necessary facility. |
840 BASE_EXPORT void EnableTerminationOnHeapCorruption(); | 840 BASE_EXPORT void EnableTerminationOnHeapCorruption(); |
841 | 841 |
842 // Turns on process termination if memory runs out. | 842 // Turns on process termination if memory runs out. |
843 BASE_EXPORT void EnableTerminationOnOutOfMemory(); | 843 BASE_EXPORT void EnableTerminationOnOutOfMemory(); |
844 | 844 |
845 #if defined(OS_MACOSX) | |
846 // Exposed for testing. | |
847 BASE_EXPORT malloc_zone_t* GetPurgeableZone(); | |
848 #endif // defined(OS_MACOSX) | |
849 | |
850 // Enables stack dump to console output on exception and signals. | 845 // Enables stack dump to console output on exception and signals. |
851 // When enabled, the process will quit immediately. This is meant to be used in | 846 // When enabled, the process will quit immediately. This is meant to be used in |
852 // unit_tests only! This is not thread-safe: only call from main thread. | 847 // unit_tests only! This is not thread-safe: only call from main thread. |
853 BASE_EXPORT bool EnableInProcessStackDumping(); | 848 BASE_EXPORT bool EnableInProcessStackDumping(); |
854 | 849 |
855 // If supported on the platform, and the user has sufficent rights, increase | 850 // If supported on the platform, and the user has sufficent rights, increase |
856 // the current process's scheduling priority to a high priority. | 851 // the current process's scheduling priority to a high priority. |
857 BASE_EXPORT void RaiseProcessToHighPriority(); | 852 BASE_EXPORT void RaiseProcessToHighPriority(); |
858 | 853 |
859 #if defined(OS_MACOSX) | 854 #if defined(OS_MACOSX) |
860 // Restore the default exception handler, setting it to Apple Crash Reporter | 855 // Restore the default exception handler, setting it to Apple Crash Reporter |
861 // (ReportCrash). When forking and execing a new process, the child will | 856 // (ReportCrash). When forking and execing a new process, the child will |
862 // inherit the parent's exception ports, which may be set to the Breakpad | 857 // inherit the parent's exception ports, which may be set to the Breakpad |
863 // instance running inside the parent. The parent's Breakpad instance should | 858 // instance running inside the parent. The parent's Breakpad instance should |
864 // not handle the child's exceptions. Calling RestoreDefaultExceptionHandler | 859 // not handle the child's exceptions. Calling RestoreDefaultExceptionHandler |
865 // in the child after forking will restore the standard exception handler. | 860 // in the child after forking will restore the standard exception handler. |
866 // See http://crbug.com/20371/ for more details. | 861 // See http://crbug.com/20371/ for more details. |
867 void RestoreDefaultExceptionHandler(); | 862 void RestoreDefaultExceptionHandler(); |
868 #endif // defined(OS_MACOSX) | 863 #endif // defined(OS_MACOSX) |
869 | 864 |
| 865 #if defined(OS_MACOSX) |
| 866 // Very large images or svg canvases can cause huge mallocs. Skia |
| 867 // does tricks on tcmalloc-based systems to allow malloc to fail with |
| 868 // a NULL rather than hit the oom crasher. This replicates that for |
| 869 // OSX. |
| 870 // |
| 871 // IF YOU USE THIS WITHOUT CONSULTING YOUR FRIENDLY OSX DEVELOPER, |
| 872 // YOUR CODE IS LIKELY TO BE REVERTED. THANK YOU. |
| 873 // |
| 874 // TODO(shess): Weird place to put it, but this is where the OOM |
| 875 // killer currently lives. |
| 876 BASE_EXPORT void* UncheckedMalloc(size_t size); |
| 877 #endif // defined(OS_MACOSX) |
| 878 |
870 } // namespace base | 879 } // namespace base |
871 | 880 |
872 #endif // BASE_PROCESS_UTIL_H_ | 881 #endif // BASE_PROCESS_UTIL_H_ |
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