blob: 03030a793d463b4d78113ddadc90d0cc02c8393e [file] [log] [blame]
// Copyright 2021 The Pigweed Authors
// 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
// 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 = "proto3";
package pw.snapshot;
option java_package = "pw.snapshot.proto";
option java_outer_classname = "Snapshot";
import "pw_cpu_exception_cortex_m_protos/cpu_state.proto";
import "pw_log/proto/log.proto";
import "pw_thread_protos/thread.proto";
import "pw_snapshot_metadata_proto/snapshot_metadata.proto";
// The Snapshot proto is a list that dictates field numbers that should
// be used when serializing proto messages into a "Snapshot" that can be
// ingested by Pigweed's upstream tooling.
// There are various field number ranges that are marked for "upstream" use,
// and others that are marked for "pigweed users". This allows a user to
// define a parallel proto that defines product-specific messages using mutually
// exclusive field numbers:
// MySnapshot {
// // Use a project-specific logging proto format.
// repeated MyLogFormat = 8;
// // Pigweed's snapshot doesn't support my custom RTOS, so write that to
// // a field number reserved for downstream projects.
// MyCustomRtosInfo = 22;
// }
// Writing both proto messages to the same proto encoder is valid because the
// field nubmers are mutually exclusive. This prevents collisions that would
// break a proto decode. The final message will have to be decoded twice; once
// as a pw.snapshot.Snapshot and once as the project-specific message.
message Snapshot {
repeated pw.log.LogEntry logs = 1;
// RESERVED FOR PIGWEED. These field numbers are reserved strictly for things
// that are very generally useful and high in count. Downstream projects may
// NOT write to these fields.
// Encodes to a single byte of tag overhead.
reserved 2 to 7;
// RESERVED FOR USERS. These field numbers should be used for writing
// project-specific proto messages that repeat in high quantity to reduce
// proto encoding overhead. Pigweed must not write to these fields.
// Encodes to a single byte of tag overhead.
reserved 8 to 15;
// Note: Proto tags 16-2047 encode with two bytes of overhead.
Metadata metadata = 16;
// Other data that should be highlighted in this crash. This field may have
// entries added to it during a decode.
map<string, string> tags = 17;
repeated pw.thread.Thread threads = 18;
// If a device has multiple cores, it may be useful to collect an associated
// snapshot for attached cores when a snapshot collection is triggered on one
// core. By embedding one or more snapshots into a snapshot, the snapshots are
// considered associated.
repeated Snapshot related_snapshots = 19;
pw.cpu_exception.cortex_m.ArmV7mCpuState armv7m_cpu_state = 20;
// RESERVED FOR PIGWEED. Downstream projects may NOT write to these fields.
// Encodes to two bytes of tag overhead.
reserved 21 to 1031;
// RESERVED FOR USERS. Encodes to two or more bytes of tag overhead.
reserved 1032 to max;