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comparison: xpcom/threads/ThreadStackHelper.h
xpcom/threads/ThreadStackHelper.h
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- TOR_BUG_9701
- changeset 15
- b8a032363ba2
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| -1:000000000000 | 0:352008034fda |
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| 1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef mozilla_ThreadStackHelper_h | |
| 7 #define mozilla_ThreadStackHelper_h | |
| 8 | |
| 9 #include "mozilla/ThreadHangStats.h" | |
| 10 | |
| 11 #include "GeckoProfiler.h" | |
| 12 | |
| 13 #include <stddef.h> | |
| 14 | |
| 15 #if defined(XP_LINUX) | |
| 16 #include <signal.h> | |
| 17 #include <semaphore.h> | |
| 18 #include <sys/types.h> | |
| 19 #elif defined(XP_WIN) | |
| 20 #include <windows.h> | |
| 21 #elif defined(XP_MACOSX) | |
| 22 #include <mach/mach.h> | |
| 23 #endif | |
| 24 | |
| 25 namespace mozilla { | |
| 26 | |
| 27 /** | |
| 28 * ThreadStackHelper is used to retrieve the profiler pseudo-stack of a | |
| 29 * thread, as an alternative of using the profiler to take a profile. | |
| 30 * The target thread first declares an ThreadStackHelper instance; | |
| 31 * then another thread can call ThreadStackHelper::GetStack to retrieve | |
| 32 * the pseudo-stack of the target thread at that instant. | |
| 33 * | |
| 34 * Only non-copying labels are included in the stack, which means labels | |
| 35 * with custom text and markers are not included. | |
| 36 */ | |
| 37 class ThreadStackHelper | |
| 38 { | |
| 39 public: | |
| 40 typedef Telemetry::HangHistogram::Stack Stack; | |
| 41 | |
| 42 private: | |
| 43 #ifdef MOZ_ENABLE_PROFILER_SPS | |
| 44 const PseudoStack* const mPseudoStack; | |
| 45 #endif | |
| 46 Stack mStackBuffer; | |
| 47 size_t mMaxStackSize; | |
| 48 | |
| 49 bool PrepareStackBuffer(Stack& aStack); | |
| 50 void FillStackBuffer(); | |
| 51 | |
| 52 public: | |
| 53 /** | |
| 54 * Initialize ThreadStackHelper. Must be called from main thread. | |
| 55 */ | |
| 56 static void Startup(); | |
| 57 /** | |
| 58 * Uninitialize ThreadStackHelper. Must be called from main thread. | |
| 59 */ | |
| 60 static void Shutdown(); | |
| 61 | |
| 62 /** | |
| 63 * Create a ThreadStackHelper instance targeting the current thread. | |
| 64 */ | |
| 65 ThreadStackHelper(); | |
| 66 | |
| 67 ~ThreadStackHelper(); | |
| 68 | |
| 69 /** | |
| 70 * Retrieve the current pseudostack of the thread associated | |
| 71 * with this ThreadStackHelper. | |
| 72 * | |
| 73 * @param aStack Stack instance to be filled. | |
| 74 */ | |
| 75 void GetStack(Stack& aStack); | |
| 76 | |
| 77 #if defined(XP_LINUX) | |
| 78 private: | |
| 79 static int sInitialized; | |
| 80 static sem_t sSem; | |
| 81 static struct sigaction sOldSigAction; | |
| 82 static ThreadStackHelper* sCurrent; | |
| 83 | |
| 84 static void SigAction(int aSignal, siginfo_t* aInfo, void* aContext); | |
| 85 | |
| 86 pid_t mThreadID; | |
| 87 | |
| 88 #elif defined(XP_WIN) | |
| 89 private: | |
| 90 bool mInitialized; | |
| 91 HANDLE mThreadID; | |
| 92 | |
| 93 #elif defined(XP_MACOSX) | |
| 94 private: | |
| 95 thread_act_t mThreadID; | |
| 96 | |
| 97 #endif | |
| 98 }; | |
| 99 | |
| 100 } // namespace mozilla | |
| 101 | |
| 102 #endif // mozilla_ThreadStackHelper_h |
