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.
5 // Call stack sample data for a given profiling session.
9 option optimize_for = LITE_RUNTIME;
14 message CallStackProfile {
15 // Describes an entry in the callstack.
17 // Instruction pointer subtracted by module base.
18 optional uint64 address = 1;
20 // Index to the module identifier in |module_ids| of CallStackProfile.
21 optional int32 module_id_index = 2;
24 // A sample consisting of one or more callstacks with the same stack frames
25 // and instruction pointers.
27 // The callstack. Sample.entries[0] represents the call on the top of the
29 repeated Entry entry = 1;
31 // Number of times this stack signature occurs.
32 optional int64 count = 2;
35 // Uniquely identifies a module.
36 message ModuleIdentifier {
37 // A hash that uniquely identifies a particular program version with high
38 // probability. This is parsed from headers of the loaded module.
39 // For binaries generated by GNU tools:
40 // Contents of the .note.gnu.build-id field.
42 // GUID + AGE in the debug image headers of a module.
43 optional bytes build_id = 1;
45 // MD5Sum Prefix of the module name. This is the same hashing scheme as used
46 // to hash UMA histogram names.
47 optional fixed64 name_md5_prefix = 2;
50 // The callstack and counts.
51 repeated Sample sample = 1;
53 // List of module ids found in this sample.
54 repeated ModuleIdentifier module_id = 2;
56 // Duration of this profile.
57 optional int32 profile_duration_ms = 3;
59 // Time between samples.
60 optional int32 sampling_period_ms = 4;