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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 #include "base/tracked_objects.h" | 5 #include "base/tracked_objects.h" |
| 6 | 6 |
| 7 #include <limits.h> | 7 #include <limits.h> |
| 8 #include <stdlib.h> | 8 #include <stdlib.h> |
| 9 | 9 |
| 10 #include "base/atomicops.h" | 10 #include "base/atomicops.h" |
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| 27 | 27 |
| 28 namespace tracked_objects { | 28 namespace tracked_objects { |
| 29 | 29 |
| 30 namespace { | 30 namespace { |
| 31 // When ThreadData is first initialized, should we start in an ACTIVE state to | 31 // When ThreadData is first initialized, should we start in an ACTIVE state to |
| 32 // record all of the startup-time tasks, or should we start up DEACTIVATED, so | 32 // record all of the startup-time tasks, or should we start up DEACTIVATED, so |
| 33 // that we only record after parsing the command line flag --enable-tracking. | 33 // that we only record after parsing the command line flag --enable-tracking. |
| 34 // Note that the flag may force either state, so this really controls only the | 34 // Note that the flag may force either state, so this really controls only the |
| 35 // period of time up until that flag is parsed. If there is no flag seen, then | 35 // period of time up until that flag is parsed. If there is no flag seen, then |
| 36 // this state may prevail for much or all of the process lifetime. | 36 // this state may prevail for much or all of the process lifetime. |
| 37 const ThreadData::Status kInitialStartupState = ThreadData::PROFILING_ACTIVE; | 37 const ThreadData::ThreadStatus kInitialStartupState = |
| 38 ThreadData::PROFILING_ACTIVE; |
| 38 | 39 |
| 39 // Possible states of the profiler timing enabledness. | 40 // Possible states of the profiler timing enabledness. |
| 40 enum { | 41 enum { |
| 41 UNDEFINED_TIMING, | 42 UNDEFINED_TIMING, |
| 42 ENABLED_TIMING, | 43 ENABLED_TIMING, |
| 43 DISABLED_TIMING, | 44 DISABLED_TIMING, |
| 44 }; | 45 }; |
| 45 | 46 |
| 46 // State of the profiler timing enabledness. | 47 // State of the profiler timing enabledness. |
| 47 base::subtle::Atomic32 g_profiler_timing_enabled = UNDEFINED_TIMING; | 48 base::subtle::Atomic32 g_profiler_timing_enabled = UNDEFINED_TIMING; |
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| 698 ++incarnation_counter_; | 699 ++incarnation_counter_; |
| 699 | 700 |
| 700 // The lock is not critical for setting status_, but it doesn't hurt. It also | 701 // The lock is not critical for setting status_, but it doesn't hurt. It also |
| 701 // ensures that if we have a racy initialization, that we'll bail as soon as | 702 // ensures that if we have a racy initialization, that we'll bail as soon as |
| 702 // we get the lock earlier in this method. | 703 // we get the lock earlier in this method. |
| 703 base::subtle::Release_Store(&status_, kInitialStartupState); | 704 base::subtle::Release_Store(&status_, kInitialStartupState); |
| 704 DCHECK(base::subtle::NoBarrier_Load(&status_) != UNINITIALIZED); | 705 DCHECK(base::subtle::NoBarrier_Load(&status_) != UNINITIALIZED); |
| 705 } | 706 } |
| 706 | 707 |
| 707 // static | 708 // static |
| 708 void ThreadData::InitializeAndSetTrackingStatus(Status status) { | 709 void ThreadData::InitializeAndSetTrackingStatus(ThreadStatus status) { |
| 709 DCHECK_GE(status, DEACTIVATED); | 710 DCHECK_GE(status, DEACTIVATED); |
| 710 DCHECK_LE(status, PROFILING_ACTIVE); | 711 DCHECK_LE(status, PROFILING_ACTIVE); |
| 711 | 712 |
| 712 Initialize(); // No-op if already initialized. | 713 Initialize(); // No-op if already initialized. |
| 713 | 714 |
| 714 if (status > DEACTIVATED) | 715 if (status > DEACTIVATED) |
| 715 status = PROFILING_ACTIVE; | 716 status = PROFILING_ACTIVE; |
| 716 base::subtle::Release_Store(&status_, status); | 717 base::subtle::Release_Store(&status_, status); |
| 717 } | 718 } |
| 718 | 719 |
| 719 // static | 720 // static |
| 720 ThreadData::Status ThreadData::status() { | 721 ThreadData::ThreadStatus ThreadData::status() { |
| 721 return static_cast<ThreadData::Status>(base::subtle::Acquire_Load(&status_)); | 722 return static_cast<ThreadData::ThreadStatus>( |
| 723 base::subtle::Acquire_Load(&status_)); |
| 722 } | 724 } |
| 723 | 725 |
| 724 // static | 726 // static |
| 725 bool ThreadData::TrackingStatus() { | 727 bool ThreadData::TrackingStatus() { |
| 726 return base::subtle::Acquire_Load(&status_) > DEACTIVATED; | 728 return base::subtle::Acquire_Load(&status_) > DEACTIVATED; |
| 727 } | 729 } |
| 728 | 730 |
| 729 // static | 731 // static |
| 730 void ThreadData::EnableProfilerTiming() { | 732 void ThreadData::EnableProfilerTiming() { |
| 731 base::subtle::NoBarrier_Store(&g_profiler_timing_enabled, ENABLED_TIMING); | 733 base::subtle::NoBarrier_Store(&g_profiler_timing_enabled, ENABLED_TIMING); |
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| 968 #endif | 970 #endif |
| 969 } | 971 } |
| 970 | 972 |
| 971 ProcessDataSnapshot::ProcessDataSnapshot(const ProcessDataSnapshot& other) = | 973 ProcessDataSnapshot::ProcessDataSnapshot(const ProcessDataSnapshot& other) = |
| 972 default; | 974 default; |
| 973 | 975 |
| 974 ProcessDataSnapshot::~ProcessDataSnapshot() { | 976 ProcessDataSnapshot::~ProcessDataSnapshot() { |
| 975 } | 977 } |
| 976 | 978 |
| 977 } // namespace tracked_objects | 979 } // namespace tracked_objects |
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