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feat(bin): parse tag for logcat

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refs #424
This commit is contained in:
Simon Chan 2022-06-07 00:07:50 +08:00
parent ca551a2414
commit 6158745ef5
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3 changed files with 65 additions and 30 deletions
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53
libraries/android-bin/src/logcat.ts
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@ -1,7 +1,7 @@
// cspell: ignore logcat
import { AdbCommandBase, AdbSubprocessNoneProtocol, BufferedStream, BufferedStreamEndedError, DecodeUtf8Stream, ReadableStream, SplitLineStream, WritableStream } from "@yume-chan/adb";
import Struct, { StructAsyncDeserializeStream } from "@yume-chan/struct";
import Struct, { decodeUtf8, StructAsyncDeserializeStream } from "@yume-chan/struct";
// `adb logcat` is an alias to `adb shell logcat`
// so instead of adding to core library, it's implemented here
@ -19,7 +19,8 @@ export enum LogId {
Kernel,
}
export enum LogPriority {
// https://cs.android.com/android/platform/superproject/+/master:system/logging/liblog/include/android/log.h;l=73;drc=82b5738732161dbaafb2e2f25cce19cd26b9157d
export enum AndroidLogPriority {
Unknown,
Default,
Verbose,
@ -56,21 +57,45 @@ export const LoggerEntry =
export type LoggerEntry = typeof LoggerEntry['TDeserializeResult'];
export interface LogMessage extends LoggerEntry {
priority: LogPriority;
payload: Uint8Array;
// https://cs.android.com/android/platform/superproject/+/master:system/logging/liblog/logprint.cpp;drc=bbe77d66e7bee8bd1f0bc7e5492b5376b0207ef6;bpv=0
export interface AndroidLogEntry extends LoggerEntry {
priority: AndroidLogPriority;
tag: string;
message: string;
}
export async function deserializeLogMessage(stream: StructAsyncDeserializeStream): Promise<LogMessage> {
const entry = await LoggerEntry.deserialize(stream);
function findTagEnd(payload: Uint8Array) {
for (const separator of [0, ' '.charCodeAt(0), ':'.charCodeAt(0)]) {
const index = payload.indexOf(separator);
if (index !== -1) {
return index;
}
}
const index = payload.findIndex(x => x >= 0x7f);
if (index !== -1) {
return index;
}
return payload.length;
}
export async function deserializeAndroidLogEntry(stream: StructAsyncDeserializeStream): Promise<AndroidLogEntry> {
const entry = await LoggerEntry.deserialize(stream) as unknown as AndroidLogEntry;
if (entry.headerSize !== LoggerEntry.size) {
await stream.read(entry.headerSize - LoggerEntry.size);
}
const priority = (await stream.read(1))[0] as LogPriority;
const payload = await stream.read(entry.payloadSize - 1);
(entry as any).priority = priority;
(entry as any).payload = payload;
return entry as LogMessage;
let payload = await stream.read(entry.payloadSize);
// https://cs.android.com/android/platform/superproject/+/master:system/logging/logcat/logcat.cpp;l=193-194;drc=bbe77d66e7bee8bd1f0bc7e5492b5376b0207ef6
// TODO: payload for some log IDs are in binary format.
entry.priority = payload[0] as AndroidLogPriority;
payload = payload.subarray(1);
const tagEnd = findTagEnd(payload);
entry.tag = decodeUtf8(payload.subarray(0, tagEnd));
entry.message = tagEnd < payload.length - 1 ? decodeUtf8(payload.subarray(tagEnd + 1)) : '';
return entry;
}
export interface LogSize {
@ -158,7 +183,7 @@ export class Logcat extends AdbCommandBase {
]);
}
public binary(options?: LogcatOptions): ReadableStream<LogMessage> {
public binary(options?: LogcatOptions): ReadableStream<AndroidLogEntry> {
let bufferedStream: BufferedStream;
return new ReadableStream({
start: async () => {
@ -175,7 +200,7 @@ export class Logcat extends AdbCommandBase {
},
async pull(controller) {
try {
const entry = await deserializeLogMessage(bufferedStream);
const entry = await deserializeAndroidLogEntry(bufferedStream);
controller.enqueue(entry);
} catch (e) {
if (e instanceof BufferedStreamEndedError) {