| // Copyright 2015 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "components/tracing/child_memory_dump_manager_delegate_impl.h" |
| |
| #include "base/single_thread_task_runner.h" |
| #include "components/tracing/child_trace_message_filter.h" |
| |
| namespace tracing { |
| |
| // static |
| ChildMemoryDumpManagerDelegateImpl* |
| ChildMemoryDumpManagerDelegateImpl::GetInstance() { |
| return Singleton< |
| ChildMemoryDumpManagerDelegateImpl, |
| LeakySingletonTraits<ChildMemoryDumpManagerDelegateImpl>>::get(); |
| } |
| |
| ChildMemoryDumpManagerDelegateImpl::ChildMemoryDumpManagerDelegateImpl() |
| : ctmf_(nullptr) { |
| base::trace_event::MemoryDumpManager::GetInstance()->SetDelegate(this); |
| } |
| |
| ChildMemoryDumpManagerDelegateImpl::~ChildMemoryDumpManagerDelegateImpl() { |
| } |
| |
| void ChildMemoryDumpManagerDelegateImpl::SetChildTraceMessageFilter( |
| ChildTraceMessageFilter* ctmf) { |
| // Check that we are either registering the CTMF or tearing it down, but not |
| // replacing a valid instance with another one (should never happen). |
| DCHECK(ctmf_ == nullptr || (ctmf == nullptr && ctmf_task_runner_ != nullptr)); |
| ctmf_ = ctmf; |
| ctmf_task_runner_ = ctmf ? (ctmf->ipc_message_loop()) : nullptr; |
| } |
| |
| // Invoked in child processes by the MemoryDumpManager. |
| void ChildMemoryDumpManagerDelegateImpl::RequestGlobalMemoryDump( |
| const base::trace_event::MemoryDumpRequestArgs& args, |
| const base::trace_event::MemoryDumpCallback& callback) { |
| // Bail out if we receive a dump request from the manager before the |
| // ChildTraceMessageFilter has been initialized. |
| if (!ctmf_task_runner_) { |
| if (!callback.is_null()) |
| callback.Run(args.dump_guid, false /* success */); |
| return; |
| } |
| |
| // Make sure we access |ctmf_| only on the thread where it lives to avoid |
| // races on shutdown. |
| if (!ctmf_task_runner_->BelongsToCurrentThread()) { |
| ctmf_task_runner_->PostTask( |
| FROM_HERE, |
| base::Bind(&ChildMemoryDumpManagerDelegateImpl::RequestGlobalMemoryDump, |
| base::Unretained(this), args, callback)); |
| return; |
| } |
| |
| // The ChildTraceMessageFilter could have been destroyed while hopping on the |
| // right thread. If this is the case, bail out. |
| if (!ctmf_) { |
| if (!callback.is_null()) |
| callback.Run(args.dump_guid, false /* success */); |
| return; |
| } |
| |
| // Send the request up to the browser process' MessageDumpmanager. |
| ctmf_->SendGlobalMemoryDumpRequest(args, callback); |
| } |
| |
| bool ChildMemoryDumpManagerDelegateImpl::IsCoordinatorProcess() const { |
| return false; |
| } |
| |
| } // namespace tracing |