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/*
* Copyright (C) 2023 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.
*/
import java.io.File;
import java.io.IOException;
public class NonStreamTraceParser extends BaseTraceParser {
public void CheckTraceFileFormat(File file, int expectedVersion) throws Exception {
InitializeParser(file);
// On non-streaming formats, the file starts with information about options and threads and
// method information.
// Read version string and version.
String line = readLine();
if (!line.equals("*version")) {
throw new Exception("Trace doesn't start with version. Starts with: " + line);
}
int version = Integer.decode(readLine());
if (version != expectedVersion) {
throw new Exception("Unexpected version: " + version);
}
// Record numEntries and ignore next few options that provides some metadata.
line = readLine();
int numEntries = 0;
while (!line.startsWith(START_SECTION_ID)) {
if (line.startsWith("num-method-calls")) {
String[] tokens = line.split("=");
numEntries = Integer.decode(tokens[1]);
}
line = readLine();
}
// This should be threads.
if (!line.equals(THREADS_SECTION_ID)) {
throw new Exception("Missing information about threads " + line);
}
line = readLine();
while (!line.startsWith(START_SECTION_ID)) {
String[] threadInfo = line.split("\t", 2);
threadIdMap.put(Integer.decode(threadInfo[0]), threadInfo[1]);
line = readLine();
}
// Parse methods
if (!line.equals(METHODS_SECTION_ID)) {
throw new Exception("Missing information about methods " + line);
}
line = readLine();
while (!line.startsWith(START_SECTION_ID)) {
String[] methodInfo = line.split("\t", 2);
methodIdMap.put(Integer.decode(methodInfo[0]), methodInfo[1]);
line = readLine();
}
// This should be end
if (!line.equals(END_SECTION_ID)) {
throw new Exception("Missing end after methods " + line);
}
// Validate the actual data.
validateTraceHeader(expectedVersion);
boolean hasEntries = true;
boolean seenStopTracingMethod = false;
for (int i = 0; i < numEntries; i++) {
int threadId = GetEntryHeader();
String eventString = ProcessEventEntry(threadId);
// Ignore daemons (ex: heap task daemon, reference queue daemon) because they may not
// be deterministic.
if (ShouldIgnoreThread(threadId)) {
continue;
}
// Ignore events after method tracing was stopped. The code that is executed
// later could be non-deterministic.
if (!seenStopTracingMethod) {
UpdateThreadEvents(threadId, eventString);
}
if (eventString.contains("Main$VMDebug $noinline$stopMethodTracing")) {
seenStopTracingMethod = true;
}
}
closeFile();
// Printout the events.
for (String str : threadEventsMap.values()) {
System.out.println(str);
}
}
}
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