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// 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.
// Call stack sample data for a given profiling session.
syntax = "proto2";
option optimize_for = LITE_RUNTIME;
option java_outer_classname = "CallStackProfileProtos";
option java_package = "org.chromium.components.metrics";
package metrics;
// Next tag: 5
message CallStackProfile {
// Describes an entry in the callstack.
message Entry {
// Instruction pointer subtracted by module base.
optional uint64 address = 1;
// Index to the module identifier in |module_ids| of CallStackProfile.
optional int32 module_id_index = 2;
}
// A sample consisting of one or more callstacks with the same stack frames
// and instruction pointers.
message Sample {
// The callstack. Sample.entries[0] represents the call on the top of the
// stack.
repeated Entry entry = 1;
// Number of times this stack signature occurs.
optional int64 count = 2;
}
// Uniquely identifies a module.
message ModuleIdentifier {
// A hash that uniquely identifies a particular program version with high
// probability. This is parsed from headers of the loaded module.
// For binaries generated by GNU tools:
// Contents of the .note.gnu.build-id field.
// On Windows:
// GUID + AGE in the debug image headers of a module.
optional string build_id = 1;
// MD5Sum Prefix of the module name. This is the same hashing scheme as used
// to hash UMA histogram names.
optional fixed64 name_md5_prefix = 2;
}
// The callstack and counts.
repeated Sample sample = 1;
// List of module ids found in this sample.
repeated ModuleIdentifier module_id = 2;
// Duration of this profile.
optional int32 profile_duration_ms = 3;
// Time between samples.
optional int32 sampling_period_ms = 4;
}
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