1/* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17syntax = "proto2"; 18 19package perfetto.protos; 20 21// Representation of a stack. To be used as input to generate flame charts 22// or pprof. 23message Stack { 24 // A stack is an ordered list of these entries. Think of them as frames in the 25 // stack, although we support entire call stacks as an entry (for efficiency, 26 // no need to copy entire stacks around if we can just copy a callsite_id). 27 message Entry { 28 oneof entry { 29 string name = 1; 30 uint32 callsite_id = 2; 31 uint32 annotated_callsite_id = 3; 32 uint32 frame_id = 4; 33 } 34 } 35 // Ordered list of "frames" in the stack. Leaf is at index 0. 36 // Note that we call these entries and not frames because an entire call stack 37 // can be referenced in one entry (via callsite_id). 38 repeated Entry entries = 1; 39} 40