OLD | NEW |
(Empty) | |
| 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "components/tracing/child/child_memory_dump_manager_delegate_impl.h" |
| 6 |
| 7 #include "base/single_thread_task_runner.h" |
| 8 #include "build/build_config.h" |
| 9 #include "components/tracing/child/child_trace_message_filter.h" |
| 10 #include "components/tracing/common/process_metrics_memory_dump_provider.h" |
| 11 |
| 12 namespace tracing { |
| 13 |
| 14 namespace { |
| 15 void AbortDumpRequest(const base::trace_event::MemoryDumpRequestArgs& args, |
| 16 const base::trace_event::MemoryDumpCallback& callback) { |
| 17 if (!callback.is_null()) |
| 18 callback.Run(args.dump_guid, false /* success */); |
| 19 } |
| 20 } // namespace |
| 21 |
| 22 // static |
| 23 ChildMemoryDumpManagerDelegateImpl* |
| 24 ChildMemoryDumpManagerDelegateImpl::GetInstance() { |
| 25 return base::Singleton< |
| 26 ChildMemoryDumpManagerDelegateImpl, |
| 27 base::LeakySingletonTraits<ChildMemoryDumpManagerDelegateImpl>>::get(); |
| 28 } |
| 29 |
| 30 ChildMemoryDumpManagerDelegateImpl::ChildMemoryDumpManagerDelegateImpl() |
| 31 : ctmf_(nullptr), |
| 32 tracing_process_id_( |
| 33 base::trace_event::MemoryDumpManager::kInvalidTracingProcessId) { |
| 34 } |
| 35 |
| 36 ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() {} |
| 37 |
| 38 void ChildMemoryDumpManagerDelegateImpl::SetChildTraceMessageFilter( |
| 39 ChildTraceMessageFilter* ctmf) { |
| 40 auto* task_runner = ctmf ? (ctmf->ipc_task_runner()) : nullptr; |
| 41 // Check that we are either registering the CTMF or tearing it down, but not |
| 42 // replacing a valid instance with another one (should never happen). |
| 43 DCHECK(!ctmf_ || (!ctmf && ctmf_task_runner_)); |
| 44 ctmf_ = ctmf; |
| 45 |
| 46 { |
| 47 base::AutoLock lock(lock_); |
| 48 ctmf_task_runner_ = task_runner; |
| 49 } |
| 50 |
| 51 if (ctmf) { |
| 52 base::trace_event::MemoryDumpManager::GetInstance()->Initialize( |
| 53 this /* delegate */, false /* is_coordinator */); |
| 54 |
| 55 #if !defined(OS_LINUX) && !defined(OS_NACL) |
| 56 // On linux the browser process takes care of dumping process metrics. |
| 57 // The child process is not allowed to do so due to BPF sandbox. |
| 58 tracing::ProcessMetricsMemoryDumpProvider::RegisterForProcess( |
| 59 base::kNullProcessId); |
| 60 #endif |
| 61 } |
| 62 } |
| 63 |
| 64 // Invoked in child processes by the MemoryDumpManager. |
| 65 void ChildMemoryDumpManagerDelegateImpl::RequestGlobalMemoryDump( |
| 66 const base::trace_event::MemoryDumpRequestArgs& args, |
| 67 const base::trace_event::MemoryDumpCallback& callback) { |
| 68 // RequestGlobalMemoryDump can be called on any thread, cannot access |
| 69 // ctmf_task_runner_ as it could be racy. |
| 70 scoped_refptr<base::SingleThreadTaskRunner> ctmf_task_runner; |
| 71 { |
| 72 base::AutoLock lock(lock_); |
| 73 ctmf_task_runner = ctmf_task_runner_; |
| 74 } |
| 75 |
| 76 // Bail out if we receive a dump request from the manager before the |
| 77 // ChildTraceMessageFilter has been initialized. |
| 78 if (!ctmf_task_runner) { |
| 79 VLOG(1) << base::trace_event::MemoryDumpManager::kLogPrefix |
| 80 << " failed because child trace message filter hasn't been" |
| 81 << " initialized"; |
| 82 return AbortDumpRequest(args, callback); |
| 83 } |
| 84 |
| 85 // Make sure we access |ctmf_| only on the thread where it lives to avoid |
| 86 // races on shutdown. |
| 87 if (!ctmf_task_runner->BelongsToCurrentThread()) { |
| 88 const bool did_post_task = ctmf_task_runner->PostTask( |
| 89 FROM_HERE, |
| 90 base::Bind(&ChildMemoryDumpManagerDelegateImpl::RequestGlobalMemoryDump, |
| 91 base::Unretained(this), args, callback)); |
| 92 if (!did_post_task) |
| 93 return AbortDumpRequest(args, callback); |
| 94 return; |
| 95 } |
| 96 |
| 97 // The ChildTraceMessageFilter could have been destroyed while hopping on the |
| 98 // right thread. If this is the case, bail out. |
| 99 if (!ctmf_) { |
| 100 VLOG(1) << base::trace_event::MemoryDumpManager::kLogPrefix |
| 101 << " failed because child trace message filter was" |
| 102 << " destroyed while switching threads"; |
| 103 return AbortDumpRequest(args, callback); |
| 104 } |
| 105 |
| 106 // Send the request up to the browser process' MessageDumpmanager. |
| 107 ctmf_->SendGlobalMemoryDumpRequest(args, callback); |
| 108 } |
| 109 |
| 110 uint64_t ChildMemoryDumpManagerDelegateImpl::GetTracingProcessId() const { |
| 111 return tracing_process_id_; |
| 112 } |
| 113 |
| 114 } // namespace tracing |
OLD | NEW |