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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 "call_stack_profile_metrics_provider.h" | |
6 | |
7 #include "base/md5.h" | |
8 #include "base/profiler/stack_sampling_profiler.h" | |
9 #include "components/metrics/proto/chrome_user_metrics_extension.pb.h" | |
10 | |
11 using base::StackSamplingProfiler; | |
12 using metrics::CallStackProfile; | |
13 using metrics::CallStackEntry; | |
Ilya Sherman
2015/03/10 01:44:46
nit: Please alphabetize
Mike Wittman
2015/03/16 23:55:14
Done.
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14 using metrics::ChromeUserMetricsExtension; | |
15 using metrics::ModuleIdentifier; | |
16 using metrics::SampledProfile; | |
17 | |
18 namespace { | |
Ilya Sherman
2015/03/10 01:44:46
nit: Please include a blank line after this one.
Mike Wittman
2015/03/16 23:55:15
Done.
| |
19 // The protobuf expects the MD5 checksum prefix of the module name. | |
20 uint64 HashModuleFilename(const base::FilePath& filename) { | |
21 const base::FilePath::StringType basename = filename.BaseName().value(); | |
22 base::MD5Digest md5; | |
23 base::MD5Sum(&basename[0], basename.size() * sizeof(base::FilePath::CharType), | |
24 &md5); | |
25 return *reinterpret_cast<uint64*>(&md5.a[0]); | |
26 } | |
27 | |
28 void CopySampleToProto(const StackSamplingProfiler::Sample& sample, | |
29 CallStackProfile::Sample* proto_sample) { | |
Ilya Sherman
2015/03/10 01:44:46
nit: Please document all functions, including loca
Mike Wittman
2015/03/16 23:55:15
Done.
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30 for (const StackSamplingProfiler::Frame& frame : sample) { | |
31 CallStackEntry* call_stack_entry = proto_sample->add_entries(); | |
32 call_stack_entry->set_address(frame.ip_offset); | |
33 call_stack_entry->set_module_id_index(frame.module_index); | |
34 } | |
35 } | |
36 | |
37 void CopyProfileToProto( | |
38 const StackSamplingProfiler::Profile& profile, | |
39 metrics::CallStackProfile* proto_profile) { | |
40 if (profile.samples.empty()) | |
41 return; | |
42 | |
43 CallStackProfile::Sample* current_sample_proto = nullptr; | |
44 for (auto it = profile.samples.begin(); it != profile.samples.end(); ++it) { | |
45 if (!current_sample_proto || *it != *(it - 1)) { | |
Ilya Sherman
2015/03/10 01:44:46
Hmm, this seems like a surprising design. Why doe
Mike Wittman
2015/03/16 23:55:15
After further discussion, we want to support two d
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46 current_sample_proto = proto_profile->add_samples(); | |
47 CopySampleToProto(profile.samples.front(), current_sample_proto); | |
48 current_sample_proto->set_count(1); | |
49 } else { | |
50 current_sample_proto->set_count(current_sample_proto->count() + 1); | |
51 } | |
52 } | |
53 | |
54 for (const StackSamplingProfiler::Module& module : profile.modules) { | |
55 ModuleIdentifier* module_id = proto_profile->add_module_ids(); | |
56 module_id->set_build_id(module.id); | |
57 module_id->set_name_md5_prefix(HashModuleFilename(module.filename)); | |
58 } | |
59 | |
60 proto_profile->set_profile_duration_ms( | |
61 profile.profile_duration.InMilliseconds()); | |
62 proto_profile->set_sampling_period_ms( | |
63 profile.sampling_period.InMilliseconds()); | |
64 } | |
65 } // namespace | |
66 | |
67 CallStackProfileMetricsProvider::CallStackProfileMetricsProvider() {} | |
68 | |
69 CallStackProfileMetricsProvider::~CallStackProfileMetricsProvider() {} | |
70 | |
71 void CallStackProfileMetricsProvider::ProvideGeneralMetrics( | |
72 metrics::ChromeUserMetricsExtension* uma_proto) { | |
73 std::vector<StackSamplingProfiler::Profile> profiles; | |
74 StackSamplingProfiler::GetPendingProfiles(&profiles); | |
75 | |
76 for (StackSamplingProfiler::Profile profile : profiles) { | |
77 CallStackProfile* call_stack_profile = | |
78 uma_proto->add_sampled_profile()->mutable_call_stack_profile(); | |
79 CopyProfileToProto(profile, call_stack_profile); | |
80 } | |
81 } | |
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