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1 // Copyright 2017 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 "base/trace_event/memory_tracing_observer.h" | |
6 | |
7 #include "base/trace_event/memory_dump_manager.h" | |
8 #include "base/trace_event/trace_event_argument.h" | |
9 | |
10 namespace base { | |
11 namespace trace_event { | |
12 | |
13 namespace { | |
14 | |
15 const int kTraceEventNumArgs = 1; | |
16 const char* kTraceEventArgNames[] = {"dumps"}; | |
17 const unsigned char kTraceEventArgTypes[] = {TRACE_VALUE_TYPE_CONVERTABLE}; | |
18 | |
19 }; // namespace | |
20 | |
21 MemoryTracingObserver::MemoryTracingObserver( | |
22 TraceLog* trace_log, | |
23 MemoryDumpManager* memory_dump_manager) { | |
24 enabled_ = false; | |
Primiano Tucci (use gerrit)
2017/04/21 10:10:26
initialize these in the ctor initializer list (Cto
hjd
2017/04/21 11:51:58
Done.
| |
25 trace_log_ = trace_log; | |
26 memory_dump_manager_ = memory_dump_manager; | |
27 | |
28 // DCHECK(memory_dump_manager_->IsInitialized()); | |
Primiano Tucci (use gerrit)
2017/04/21 10:10:27
remove this?
hjd
2017/04/21 11:51:57
Done, thanks!
| |
29 | |
30 // If tracing was enabled before initializing MemoryDumpManager, we missed the | |
31 // OnTraceLogEnabled() event. Synthetize it so we can late-join the party. | |
32 // IsEnabled is called before adding observer to avoid calling | |
33 // OnTraceLogEnabled twice. | |
34 bool is_tracing_already_enabled = trace_log_->IsEnabled(); | |
35 trace_log_->AddEnabledStateObserver(this); | |
36 if (is_tracing_already_enabled) | |
37 OnTraceLogEnabled(); | |
38 } | |
39 | |
40 MemoryTracingObserver::~MemoryTracingObserver() { | |
41 trace_log_->RemoveEnabledStateObserver(this); | |
42 } | |
43 | |
44 void MemoryTracingObserver::OnTraceLogEnabled() { | |
45 if (!IsMemoryInfraTracingEnabled()) | |
46 return; | |
47 | |
48 const TraceConfig& trace_config = | |
49 TraceLog::GetInstance()->GetCurrentTraceConfig(); | |
50 const TraceConfig::MemoryDumpConfig& memory_dump_config = | |
51 trace_config.memory_dump_config(); | |
52 | |
53 enabled_ = true; | |
54 memory_dump_manager_->Enable(memory_dump_config); | |
55 } | |
56 | |
57 void MemoryTracingObserver::OnTraceLogDisabled() { | |
58 if (!enabled_) | |
Primiano Tucci (use gerrit)
2017/04/21 10:10:27
this extra state seems to be here only to prevent
hjd
2017/04/21 11:51:58
Done.
| |
59 return; | |
60 memory_dump_manager_->Disable(); | |
61 enabled_ = false; | |
62 } | |
63 | |
64 // static | |
65 void MemoryTracingObserver::MaybeAddDumpToTrace( | |
66 const MemoryDumpRequestArgs* req_args, | |
67 const ProcessId pid, | |
68 const ProcessMemoryDump* process_memory_dump) { | |
69 if (!IsMemoryInfraTracingEnabled()) | |
70 return; | |
71 | |
72 const uint64_t dump_guid = req_args->dump_guid; | |
73 | |
74 std::unique_ptr<TracedValue> traced_value(new TracedValue); | |
75 process_memory_dump->AsValueInto(traced_value.get()); | |
76 traced_value->SetString("level_of_detail", MemoryDumpLevelOfDetailToString( | |
77 req_args->level_of_detail)); | |
78 const char* const event_name = MemoryDumpTypeToString(req_args->dump_type); | |
79 | |
80 std::unique_ptr<ConvertableToTraceFormat> event_value( | |
81 std::move(traced_value)); | |
82 TRACE_EVENT_API_ADD_TRACE_EVENT_WITH_PROCESS_ID( | |
83 TRACE_EVENT_PHASE_MEMORY_DUMP, | |
84 TraceLog::GetCategoryGroupEnabled(MemoryDumpManager::kTraceCategory), | |
85 event_name, trace_event_internal::kGlobalScope, dump_guid, pid, | |
86 kTraceEventNumArgs, kTraceEventArgNames, kTraceEventArgTypes, | |
87 nullptr /* arg_values */, &event_value, TRACE_EVENT_FLAG_HAS_ID); | |
88 } | |
89 | |
90 // static | |
91 bool MemoryTracingObserver::IsMemoryInfraTracingEnabled() { | |
92 bool enabled; | |
93 TRACE_EVENT_CATEGORY_GROUP_ENABLED(MemoryDumpManager::kTraceCategory, | |
94 &enabled); | |
95 return enabled; | |
96 } | |
97 | |
98 } // namespace trace_event | |
99 } // namespace base | |
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