tools/profiler/SyncProfile.cpp

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
   3 /* This Source Code Form is subject to the terms of the Mozilla Public
   4  * License, v. 2.0. If a copy of the MPL was not distributed with this
   5  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   6
   7 #include "SyncProfile.h"
   8 #include "UnwinderThread2.h"
   9
  10 SyncProfile::SyncProfile(ThreadInfo* aInfo, int aEntrySize)
  11   : ThreadProfile(aInfo, aEntrySize)
  12   , mOwnerState(REFERENCED)
  13   , mUtb(nullptr)
  14 {
  15   MOZ_COUNT_CTOR(SyncProfile);
  16 }
  17
  18 SyncProfile::~SyncProfile()
  19 {
  20   MOZ_COUNT_DTOR(SyncProfile);
  21   if (mUtb) {
  22     utb__release_sync_buffer(mUtb);
  23   }
  24   Sampler::FreePlatformData(GetPlatformData());
  25 }
  26
  27 bool
  28 SyncProfile::SetUWTBuffer(LinkedUWTBuffer* aBuff)
  29 {
  30   MOZ_ASSERT(aBuff);
  31   mUtb = aBuff;
  32   return true;
  33 }
  34
  35 bool
  36 SyncProfile::ShouldDestroy()
  37 {
  38   GetMutex()->AssertNotCurrentThreadOwns();
  39   mozilla::MutexAutoLock lock(*GetMutex());
  40   if (mOwnerState == OWNED) {
  41     mOwnerState = OWNER_DESTROYING;
  42     return true;
  43   }
  44   mOwnerState = ORPHANED;
  45   return false;
  46 }
  47
  48 void
  49 SyncProfile::EndUnwind()
  50 {
  51   // Mutex must be held when this is called
  52   GetMutex()->AssertCurrentThreadOwns();
  53   if (mUtb) {
  54     utb__end_sync_buffer_unwind(mUtb);
  55   }
  56   if (mOwnerState != ORPHANED) {
  57     flush();
  58     mOwnerState = OWNED;
  59   }
  60   // Save mOwnerState before we release the mutex
  61   OwnerState ownerState = mOwnerState;
  62   ThreadProfile::EndUnwind();
  63   if (ownerState == ORPHANED) {
  64     delete this;
  65   }
  66 }
  67