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// Copyright (c) 2017, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package com.android.tools.r8;
import static com.android.tools.r8.D8Command.USAGE_MESSAGE;
import com.android.tools.r8.dex.ApplicationReader;
import com.android.tools.r8.dex.ApplicationWriter;
import com.android.tools.r8.dex.Marker;
import com.android.tools.r8.dex.Marker.Tool;
import com.android.tools.r8.errors.CompilationError;
import com.android.tools.r8.errors.MainDexError;
import com.android.tools.r8.graph.AppInfo;
import com.android.tools.r8.graph.DexApplication;
import com.android.tools.r8.ir.conversion.IRConverter;
import com.android.tools.r8.naming.NamingLens;
import com.android.tools.r8.utils.AndroidApp;
import com.android.tools.r8.utils.CfgPrinter;
import com.android.tools.r8.utils.InternalOptions;
import com.android.tools.r8.utils.ThreadUtils;
import com.android.tools.r8.utils.Timing;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStreamWriter;
import java.nio.charset.StandardCharsets;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.NoSuchFileException;
import java.nio.file.Paths;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.ExecutorService;
/**
* The D8 dex compiler.
*
* <p>D8 performs modular compilation to DEX bytecode. It supports compilation of Java bytecode and
* Android DEX bytecode to DEX bytecode including merging a mix of these input formats.
*
* <p>The D8 dexer API is intentionally limited and should "do the right thing" given a command. If
* this API does not suffice please contact the D8/R8 team.
*
* <p>The compiler is invoked by calling {@link #run(D8Command) D8.run} with an appropriate {@link
* D8Command}. For example:
*
* <pre>
* D8.run(D8Command.builder()
* .addProgramFiles(inputPathA, inputPathB)
* .setOutputPath(outputPath)
* .build());
* </pre>
*
* The above reads the input files denoted by {@code inputPathA} and {@code inputPathB}, compiles
* them to DEX bytecode (compiling from Java bytecode for such inputs and merging for DEX inputs),
* and then writes the result to the directory or zip archive specified by {@code outputPath}.
*/
public final class D8 {
private static final String VERSION = "v0.1.10";
private static final int STATUS_ERROR = 1;
private D8() {}
/**
* Main API entry for the D8 dexer.
*
* @param command D8 command.
* @return the compilation result.
*/
public static D8Output run(D8Command command) throws IOException {
InternalOptions options = command.getInternalOptions();
CompilationResult result = runForTesting(command.getInputApp(), options);
assert result != null;
D8Output output = new D8Output(result.androidApp, command.getOutputMode());
if (command.getOutputPath() != null) {
output.write(command.getOutputPath());
}
return output;
}
/**
* Main API entry for the D8 dexer.
*
* <p>The D8 dexer API is intentionally limited and should "do the right thing" given a set of
* inputs. If the API does not suffice please contact the R8 team.
*
* @param command D8 command.
* @param executor executor service from which to get threads for multi-threaded processing.
* @return the compilation result.
*/
public static D8Output run(D8Command command, ExecutorService executor) throws IOException {
InternalOptions options = command.getInternalOptions();
CompilationResult result = runForTesting(
command.getInputApp(), options, executor);
assert result != null;
D8Output output = new D8Output(result.androidApp, command.getOutputMode());
if (command.getOutputPath() != null) {
output.write(command.getOutputPath());
}
return output;
}
private static void run(String[] args) throws IOException, CompilationException {
D8Command.Builder builder = D8Command.parse(args);
if (builder.getOutputPath() == null) {
builder.setOutputPath(Paths.get("."));
}
D8Command command = builder.build();
if (command.isPrintHelp()) {
System.out.println(USAGE_MESSAGE);
return;
}
if (command.isPrintVersion()) {
System.out.println("D8 " + VERSION);
return;
}
run(command);
}
/** Command-line entry to D8. */
public static void main(String[] args) throws IOException {
if (args.length == 0) {
System.err.println(USAGE_MESSAGE);
System.exit(STATUS_ERROR);
}
try {
run(args);
} catch (NoSuchFileException e) {
System.err.println("File not found: " + e.getFile());
System.exit(STATUS_ERROR);
} catch (FileAlreadyExistsException e) {
System.err.println("File already exists: " + e.getFile());
System.exit(STATUS_ERROR);
} catch (IOException e) {
System.err.println("Failed to read or write application files: " + e.getMessage());
System.exit(STATUS_ERROR);
} catch (RuntimeException e) {
System.err.println("Compilation failed with an internal error.");
Throwable cause = e.getCause() == null ? e : e.getCause();
cause.printStackTrace();
System.exit(STATUS_ERROR);
} catch (CompilationException e) {
System.err.println("Compilation failed: " + e.getMessage());
System.err.println(USAGE_MESSAGE);
System.exit(STATUS_ERROR);
}
}
static CompilationResult runForTesting(AndroidApp inputApp, InternalOptions options)
throws IOException {
ExecutorService executor = ThreadUtils.getExecutorService(options);
try {
return runForTesting(inputApp, options, executor);
} finally {
executor.shutdown();
}
}
// Compute the marker to be placed in the main dex file.
private static Marker getMarker(InternalOptions options) {
if (options.hasMarker()) {
return options.getMarker();
}
return new Marker(Tool.D8)
.put("version", VERSION)
.put("min-api", options.minApiLevel);
}
private static CompilationResult runForTesting(
AndroidApp inputApp, InternalOptions options, ExecutorService executor) throws IOException {
try {
assert !inputApp.hasPackageDistribution();
// Disable global optimizations.
options.skipMinification = true;
options.inlineAccessors = false;
options.outline.enabled = false;
Timing timing = new Timing("DX timer");
DexApplication app = new ApplicationReader(inputApp, options, timing).read(executor);
AppInfo appInfo = new AppInfo(app);
app = optimize(app, appInfo, options, timing, executor);
// If a method filter is present don't produce output since the application is likely partial.
if (options.hasMethodsFilter()) {
System.out.println("Finished compilation with method filter: ");
options.methodsFilter.forEach((m) -> System.out.println(" - " + m));
return null;
}
Marker marker = getMarker(options);
CompilationResult output =
new CompilationResult(
new ApplicationWriter(
app, appInfo, options, marker, null, NamingLens.getIdentityLens(), null)
.write(null, executor),
app,
appInfo);
options.printWarnings();
return output;
} catch (MainDexError mainDexError) {
throw new CompilationError(mainDexError.getMessageForD8());
} catch (ExecutionException e) {
if (e.getCause() instanceof CompilationError) {
throw (CompilationError) e.getCause();
}
throw new RuntimeException(e.getMessage(), e.getCause());
}
}
private static DexApplication optimize(
DexApplication application, AppInfo appInfo, InternalOptions options,
Timing timing, ExecutorService executor)
throws IOException, ExecutionException {
final CfgPrinter printer = options.printCfg ? new CfgPrinter() : null;
IRConverter converter = new IRConverter(timing, application, appInfo, options, printer);
application = converter.convertToDex(executor);
if (options.printCfg) {
if (options.printCfgFile == null || options.printCfgFile.isEmpty()) {
System.out.print(printer.toString());
} else {
try (OutputStreamWriter writer = new OutputStreamWriter(
new FileOutputStream(options.printCfgFile),
StandardCharsets.UTF_8)) {
writer.write(printer.toString());
}
}
}
return application;
}
}
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