OLD | NEW |
---|---|
(Empty) | |
1 // Copyright 2016 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/debug/activity_analyzer.h" | |
6 | |
7 #include "base/files/file.h" | |
8 #include "base/files/file_path.h" | |
9 #include "base/files/memory_mapped_file.h" | |
10 #include "base/logging.h" | |
11 #include "base/memory/ptr_util.h" | |
12 #include "base/stl_util.h" | |
13 #include "base/strings/string_util.h" | |
14 | |
15 namespace base { | |
16 namespace debug { | |
17 | |
18 ThreadActivityAnalyzer::ThreadActivityAnalyzer( | |
19 const ThreadActivityTracker& tracker) | |
20 : activity_snapshot_valid_(tracker.Snapshot(&activity_snapshot_)) {} | |
21 | |
22 ThreadActivityAnalyzer::ThreadActivityAnalyzer(void* base, size_t size) | |
23 : ThreadActivityAnalyzer(ThreadActivityTracker(base, size)) {} | |
24 | |
25 ThreadActivityAnalyzer::ThreadActivityAnalyzer( | |
26 PersistentMemoryAllocator* allocator, | |
27 PersistentMemoryAllocator::Reference reference) | |
28 : ThreadActivityAnalyzer(allocator->GetAsObject<char>( | |
29 reference, | |
30 GlobalActivityTracker::kTypeIdActivityTracker), | |
31 allocator->GetAllocSize(reference)) {} | |
32 | |
33 ThreadActivityAnalyzer::~ThreadActivityAnalyzer() {} | |
34 | |
35 GlobalActivityAnalyzer::GlobalActivityAnalyzer( | |
36 std::unique_ptr<PersistentMemoryAllocator> allocator) | |
37 : allocator_(std::move(allocator)), allocator_iterator_(allocator_.get()) {} | |
38 | |
39 GlobalActivityAnalyzer::~GlobalActivityAnalyzer() {} | |
40 | |
41 #if !defined(OS_NACL) | |
42 std::unique_ptr<GlobalActivityAnalyzer> GlobalActivityAnalyzer::CreateWithFile( | |
43 const FilePath& file_path) { | |
44 std::unique_ptr<MemoryMappedFile> mmfile(new MemoryMappedFile()); | |
45 mmfile->Initialize(file_path); | |
manzagop (departed)
2016/08/03 14:36:06
// Note: write access is required for snapshotting
bcwhite
2016/08/04 14:06:20
Good point. Done.
| |
46 if (!mmfile->IsValid()) | |
47 return nullptr; | |
48 | |
49 if (!FilePersistentMemoryAllocator::IsFileAcceptable(*mmfile, true)) | |
50 return nullptr; | |
51 | |
52 return WrapUnique(new GlobalActivityAnalyzer( | |
53 WrapUnique(new FilePersistentMemoryAllocator( | |
54 std::move(mmfile), 0, 0, base::StringPiece(), | |
55 true)))); | |
56 } | |
57 #endif // !defined(OS_NACL) | |
58 | |
59 ThreadActivityAnalyzer* GlobalActivityAnalyzer::GetFirstAnalyzer() { | |
60 PrepareAllAnalyzers(); | |
61 analyzers_iterator_ = analyzers_.begin(); | |
62 if (analyzers_iterator_ == analyzers_.end()) | |
63 return nullptr; | |
64 return analyzers_iterator_->second.get(); | |
65 } | |
66 | |
67 ThreadActivityAnalyzer* GlobalActivityAnalyzer::GetNextAnalyzer() { | |
68 DCHECK(analyzers_iterator_ != analyzers_.end()); | |
69 ++analyzers_iterator_; | |
70 if (analyzers_iterator_ == analyzers_.end()) | |
71 return nullptr; | |
72 return analyzers_iterator_->second.get(); | |
73 } | |
74 | |
75 ThreadActivityAnalyzer* GlobalActivityAnalyzer::GetAnalyzerForThread( | |
76 const ThreadKey& key) { | |
77 auto found = analyzers_.find(key); | |
78 if (found == analyzers_.end()) | |
79 return nullptr; | |
80 return found->second.get(); | |
81 } | |
82 | |
83 void GlobalActivityAnalyzer::PrepareAllAnalyzers() { | |
84 // Fetch all the records. This will retrieve only ones created since the | |
85 // last run since the PMA iterator will continue from where it left off. | |
86 uint32_t type; | |
87 PersistentMemoryAllocator::Reference ref; | |
88 while ((ref = allocator_iterator_.GetNext(&type)) != 0) { | |
89 switch (type) { | |
90 case GlobalActivityTracker::kTypeIdActivityTracker: | |
91 case GlobalActivityTracker::kTypeIdActivityTrackerFree: | |
92 // Free or not, add it to the list of references for later analysis. | |
93 tracker_references_.insert(ref); | |
94 break; | |
95 } | |
96 } | |
97 | |
98 // Go through all the known references and create analyzers for them with | |
99 // snapshots of the current state. | |
100 analyzers_.clear(); | |
101 for (PersistentMemoryAllocator::Reference tracker_ref : tracker_references_) { | |
102 // Get the actual data segment for the tracker. This can fail if the | |
103 // record has been marked "free" since the type will not match. | |
104 void* base = allocator_->GetAsObject<char>( | |
105 tracker_ref, GlobalActivityTracker::kTypeIdActivityTracker); | |
106 if (!base) | |
107 continue; | |
108 | |
109 // Create the analyzer on the data. This will capture a snapshot of the | |
110 // tracker state. This can fail if the tracker is somehow corrupted or is | |
111 // in the process of shutting down. | |
112 std::unique_ptr<ThreadActivityAnalyzer> analyzer(new ThreadActivityAnalyzer( | |
113 base, allocator_->GetAllocSize(tracker_ref))); | |
114 if (!analyzer->IsValid()) | |
115 continue; | |
116 | |
117 // Add this analyzer to the map of known ones, indexed by a unique thread | |
118 // identifier. | |
119 DCHECK(!ContainsKey(analyzers_, analyzer->GetThreadKey())); | |
120 analyzer->allocator_reference_ = ref; | |
121 analyzers_[analyzer->GetThreadKey()] = std::move(analyzer); | |
122 } | |
123 } | |
124 | |
125 } // namespace debug | |
126 } // namespace base | |
OLD | NEW |