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/*
* Copyright (C) 2018 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
syntax = "proto2";
package perfetto.protos;
// Metadata about the processes and threads in the trace.
// Note: this proto was designed to be filled in by traced_probes and should
// only be populated with accurate information coming from the system. Other
// trace writers should prefer to fill ThreadDescriptor and ProcessDescriptor
// in TrackDescriptor.
message ProcessTree {
// Representation of a thread.
message Thread {
// The thread id (as per gettid())
optional int32 tid = 1;
// Thread group id (i.e. the PID of the process, == TID of the main thread)
optional int32 tgid = 3;
// The name of the thread.
optional string name = 2;
}
// Representation of a process.
message Process {
// The UNIX process ID, aka thread group ID (as per getpid()).
optional int32 pid = 1;
// The parent process ID, as per getppid().
optional int32 ppid = 2;
// The command line for the process, as per /proc/pid/cmdline.
// If it is a kernel thread there will only be one cmdline field
// and it will contain /proc/pid/comm.
repeated string cmdline = 3;
// No longer used as of Apr 2018, when the dedicated |threads| field was
// introduced in ProcessTree.
repeated Thread threads_deprecated = 4 [deprecated = true];
// The uid for the process, as per /proc/pid/status.
optional int32 uid = 5;
}
// List of processes and threads in the client. These lists are incremental
// and not exhaustive. A process and its threads might show up separately in
// different ProcessTree messages. A thread might event not show up at all, if
// no sched_switch activity was detected, for instance:
// #0 { processes: [{pid: 10, ...}], threads: [{pid: 11, tgid: 10}] }
// #1 { threads: [{pid: 12, tgid: 10}] }
// #2 { processes: [{pid: 20, ...}], threads: [{pid: 13, tgid: 10}] }
repeated Process processes = 1;
repeated Thread threads = 2;
// The time at which we finish collecting this process tree;
// the top-level packet timestamp is the time at which
// we begin collection.
optional uint64 collection_end_timestamp = 3;
}
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