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/*
* Copyright 2008 Google Inc.
*
* 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.
*/
package com.google.gwt.dev;
import com.google.gwt.core.ext.Linker;
import com.google.gwt.core.ext.TreeLogger;
import com.google.gwt.core.ext.UnableToCompleteException;
import com.google.gwt.core.ext.linker.ModuleMetricsArtifact;
import com.google.gwt.core.ext.linker.PrecompilationMetricsArtifact;
import com.google.gwt.core.ext.linker.impl.StandardLinkerContext;
import com.google.gwt.core.ext.typeinfo.JClassType;
import com.google.gwt.dev.CompileTaskRunner.CompileTask;
import com.google.gwt.dev.cfg.ModuleDef;
import com.google.gwt.dev.cfg.ModuleDefLoader;
import com.google.gwt.dev.cfg.PropertyCombinations;
import com.google.gwt.dev.javac.CompilationState;
import com.google.gwt.dev.javac.CompilationUnit;
import com.google.gwt.dev.jjs.JavaToJavaScriptCompiler;
import com.google.gwt.dev.jjs.PrecompilationContext;
import com.google.gwt.dev.jjs.UnifiedAst;
import com.google.gwt.dev.util.CollapsedPropertyKey;
import com.google.gwt.dev.util.Memory;
import com.google.gwt.dev.util.Util;
import com.google.gwt.dev.util.collect.Lists;
import com.google.gwt.dev.util.log.speedtracer.CompilerEventType;
import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger;
import com.google.gwt.dev.util.log.speedtracer.SpeedTracerLogger.Event;
import java.io.File;
import java.lang.management.ManagementFactory;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.SortedMap;
import java.util.SortedSet;
import java.util.TreeMap;
/**
* Performs the first phase of compilation, generating the set of permutations
* to compile, and a ready-to-compile AST.
*/
public class Precompile {
/**
* The file name for the max number of permutations output as plain text.
*/
static final String PERM_COUNT_FILENAME = "permCount.txt";
static final String PRECOMPILE_FILENAME = Precompile.PRECOMPILE_FILENAME_PREFIX
+ Precompile.PRECOMPILE_FILENAME_SUFFIX;
/**
* The file name for the serialized AST artifact from the Precompile step.
* Sometimes this file is overloaded and only contains a PrecompileOptions
* object to indicate that precompilation should run inside the CompilePerms
* step.
*/
static final String PRECOMPILE_FILENAME_PREFIX = "precompilation";
static final String PRECOMPILE_FILENAME_SUFFIX = ".ser";
/**
* Performs a command-line precompile.
*/
public static void main(String[] args) {
Memory.initialize();
SpeedTracerLogger.init();
Event precompileEvent = SpeedTracerLogger.start(CompilerEventType.PRECOMPILE);
if (System.getProperty("gwt.jjs.dumpAst") != null) {
System.out.println("Will dump AST to: " + System.getProperty("gwt.jjs.dumpAst"));
}
/*
* NOTE: main always exits with a call to System.exit to terminate any
* non-daemon threads that were started in Generators. Typically, this is to
* shutdown AWT related threads, since the contract for their termination is
* still implementation-dependent.
*/
final PrecompileTaskOptions options = new PrecompileTaskOptionsImpl();
boolean success = false;
if (new PrecompileTaskArgProcessor(options).processArgs(args)) {
CompileTask task = new CompileTask() {
@Override
public boolean run(TreeLogger logger) throws UnableToCompleteException {
return new Precompile(options).run(logger);
}
};
if (CompileTaskRunner.runWithAppropriateLogger(options, task)) {
// Exit w/ success code.
success = true;
}
}
precompileEvent.end();
System.exit(success ? 0 : 1);
}
/**
* Precompiles the given module.
*
* @param logger a logger to use
* @param compilerContext shared read only compiler state
* @return the precompilation
* @throws UnableToCompleteException
*/
public static Precompilation precompile(TreeLogger logger, CompilerContext compilerContext)
throws UnableToCompleteException {
PropertyCombinations allPermutations = new PropertyCombinations(
compilerContext.getModule().getProperties(),
compilerContext.getModule().getActiveLinkerNames());
if (compilerContext.getOptions().isIncrementalCompileEnabled() && allPermutations.size() > 1) {
logger.log(TreeLogger.ERROR,
"Current binding properties are expanding to more than one permutation "
+ "but per-file compilation requires that each compile operate on only one permutation.");
throw new UnableToCompleteException();
}
return precompile(logger, compilerContext, 0, allPermutations);
}
/**
* Validates the given module can be compiled.
*
* @param logger a logger to use
* @param compilerContext shared read only compiler state
*/
public static boolean validate(TreeLogger logger, CompilerContext compilerContext) {
Event validateEvent = SpeedTracerLogger.start(CompilerEventType.VALIDATE);
try {
ModuleDef module = compilerContext.getModule();
PrecompileTaskOptions jjsOptions = compilerContext.getOptions();
CompilationState compilationState = module.getCompilationState(logger, compilerContext);
if (jjsOptions.isStrict() && compilationState.hasErrors()) {
abortDueToStrictMode(logger);
}
String[] declEntryPts = module.getEntryPointTypeNames();
String[] additionalRootTypes = null;
if (declEntryPts.length == 0) {
// No declared entry points, just validate all visible classes.
Collection compilationUnits = compilationState.getCompilationUnits();
additionalRootTypes = new String[compilationUnits.size()];
int i = 0;
for (CompilationUnit unit : compilationUnits) {
additionalRootTypes[i++] = unit.getTypeName();
}
}
PrecompilationContext precompilationContext = PrecompilationContextCreator.create(
compilerContext, compilationState, new PropertyCombinations(module.getProperties(),
module.getActiveLinkerNames()), declEntryPts, additionalRootTypes, null);
// Allow GC later.
compilationState = null;
JavaToJavaScriptCompiler.precompile(logger, compilerContext, precompilationContext);
return true;
} catch (UnableToCompleteException e) {
// Already logged.
return false;
} finally {
validateEvent.end();
}
}
/**
* Create a list of all possible permutations configured for this module after
* collapsing soft permutations.
*/
static List getCollapsedPermutations(ModuleDef module) {
PropertyCombinations allPermutations =
new PropertyCombinations(module.getProperties(), module.getActiveLinkerNames());
List collapsedPermutations = allPermutations.collapseProperties();
return collapsedPermutations;
}
static Precompilation precompile(TreeLogger logger, CompilerContext compilerContext,
int permutationBase, PropertyCombinations allPermutations) {
return precompile(logger, compilerContext, permutationBase,
allPermutations, ManagementFactory.getRuntimeMXBean().getStartTime());
}
static Precompilation precompile(TreeLogger logger, CompilerContext compilerContext,
int permutationBase, PropertyCombinations propertyCombinations, long startTimeMilliseconds) {
Event precompileEvent = SpeedTracerLogger.start(CompilerEventType.PRECOMPILE);
// This initializes the Java2D library in a thread so that the main program
// doesn't block when the library is accessed for the first time.
new GraphicsInitThread().start();
try {
ModuleDef module = compilerContext.getModule();
PrecompileTaskOptions jjsOptions = compilerContext.getOptions();
if (jjsOptions.isIncrementalCompileEnabled()) {
compilerContext.getMinimalRebuildCache().recordDiskSourceResources(module);
compilerContext.getMinimalRebuildCache().recordBuildResources(module);
}
CompilationState compilationState = module.getCompilationState(logger, compilerContext);
if (jjsOptions.isStrict() && compilationState.hasErrors()) {
abortDueToStrictMode(logger);
}
List initialTypeOracleTypes = new ArrayList();
if (jjsOptions.isCompilerMetricsEnabled()) {
for (JClassType type : compilationState.getTypeOracle().getTypes()) {
initialTypeOracleTypes.add(type.getPackage().getName() + "." + type.getName());
}
}
// Track information about the module load including initial type
// oracle build for diagnostic purposes.
long moduleLoadFinished = System.currentTimeMillis();
String[] declEntryPts = module.getEntryPointTypeNames();
if (declEntryPts.length == 0) {
logger.log(TreeLogger.ERROR, "Module has no entry points defined", null);
throw new UnableToCompleteException();
}
PrecompilationMetricsArtifact precompilationMetrics =
jjsOptions.isCompilerMetricsEnabled()
? new PrecompilationMetricsArtifact(permutationBase) : null;
PrecompilationContext precompilationContext = PrecompilationContextCreator.create(
compilerContext, compilationState, propertyCombinations, declEntryPts, null,
precompilationMetrics);
// Allow GC later.
compilationState = null;
UnifiedAst unifiedAst =
JavaToJavaScriptCompiler.precompile(logger, compilerContext, precompilationContext);
if (jjsOptions.isCompilerMetricsEnabled()) {
ModuleMetricsArtifact moduleMetrics = new ModuleMetricsArtifact();
moduleMetrics.setSourceFiles(module.getAllSourceFiles());
// The initial type list has to be gathered before the call to
// precompile().
moduleMetrics.setInitialTypes(initialTypeOracleTypes);
// The elapsed time in ModuleMetricsArtifact represents time
// which could be done once for all permutations.
moduleMetrics.setElapsedMilliseconds(moduleLoadFinished - startTimeMilliseconds);
unifiedAst.setModuleMetrics(moduleMetrics);
}
// Merge all identical permutations together.
List permutations =
new ArrayList(Arrays.asList(precompilationContext.getPermutations()));
mergeCollapsedPermutations(permutations);
// Sort the permutations by an ordered key to ensure determinism.
SortedMap merged =
new TreeMap();
SortedSet liveRebindRequests = unifiedAst.getRebindRequests();
for (Permutation permutation : permutations) {
// Construct a key for the live rebind answers.
RebindAnswersPermutationKey key =
new RebindAnswersPermutationKey(permutation, liveRebindRequests);
if (merged.containsKey(key)) {
Permutation existing = merged.get(key);
existing.mergeFrom(permutation, liveRebindRequests);
} else {
merged.put(key, permutation);
}
}
permutations.clear();
permutations.addAll(merged.values());
if (jjsOptions.isCompilerMetricsEnabled()) {
int[] ids = new int[propertyCombinations.size()];
for (int i = 0; i < propertyCombinations.size(); i++) {
ids[i] = permutationBase + i;
}
precompilationMetrics.setPermutationIds(ids);
// TODO(zundel): Right now this double counts module load and
// precompile time. It correctly counts the amount of time spent
// in this process. The elapsed time in ModuleMetricsArtifact
// represents time which could be done once for all permutations.
precompilationMetrics.setElapsedMilliseconds(System.currentTimeMillis()
- startTimeMilliseconds);
unifiedAst.setPrecompilationMetrics(precompilationMetrics);
}
return new Precompilation(unifiedAst, permutations, permutationBase,
precompilationContext.getGeneratorArtifacts());
} catch (UnableToCompleteException e) {
// We intentionally don't pass in the exception here since the real
// cause has been logged.
return null;
} finally {
precompileEvent.end();
}
}
private static void abortDueToStrictMode(TreeLogger logger) throws UnableToCompleteException {
logger.log(TreeLogger.ERROR, "Aborting compile due to errors in some input files");
throw new UnableToCompleteException();
}
/**
* This merges Permutations that can be considered equivalent by considering
* their collapsed properties. The list passed into this method may have
* elements removed from it.
*/
private static void mergeCollapsedPermutations(List permutations) {
if (permutations.size() < 2) {
return;
}
// See the doc for CollapsedPropertyKey
SortedMap> mergedByCollapsedProperties =
new TreeMap>();
// This loop creates the equivalence sets
for (Iterator it = permutations.iterator(); it.hasNext();) {
Permutation entry = it.next();
CollapsedPropertyKey key = new CollapsedPropertyKey(entry);
List equivalenceSet = mergedByCollapsedProperties.get(key);
if (equivalenceSet == null) {
equivalenceSet = Lists.create();
} else {
// Mutate list
it.remove();
equivalenceSet = Lists.add(equivalenceSet, entry);
}
mergedByCollapsedProperties.put(key, equivalenceSet);
}
// This loop merges the Permutations together
for (Map.Entry> entry : mergedByCollapsedProperties
.entrySet()) {
Permutation mergeInto = entry.getKey().getPermutation();
/*
* Merge the deferred-binding properties once we no longer need the
* PropertyOracle data from the extra permutations.
*/
for (Permutation mergeFrom : entry.getValue()) {
mergeInto.mergeRebindsFromCollapsed(mergeFrom);
}
}
// Renumber the Permutations
for (int i = 0, j = permutations.size(); i < j; i++) {
permutations.set(i, new Permutation(i, permutations.get(i)));
}
}
private final PrecompileTaskOptionsImpl options;
private CompilerContext compilerContext;
private final CompilerContext.Builder compilerContextBuilder = new CompilerContext.Builder();
public Precompile(PrecompileTaskOptions options) {
this.options = new PrecompileTaskOptionsImpl(options);
compilerContext = compilerContextBuilder.options(options).build();
}
public boolean run(TreeLogger logger) throws UnableToCompleteException {
for (String moduleName : options.getModuleNames()) {
File compilerWorkDir = options.getCompilerWorkDir(moduleName);
Util.recursiveDelete(compilerWorkDir, true);
// No need to check mkdirs result because an IOException will occur
// anyway.
compilerWorkDir.mkdirs();
File precompilationFile = new File(compilerWorkDir, PRECOMPILE_FILENAME);
ModuleDef module = ModuleDefLoader.loadFromClassPath(logger, moduleName);
compilerContext = compilerContextBuilder.module(module).build();
StandardLinkerContext linkerContext = new StandardLinkerContext(
TreeLogger.NULL, module, compilerContext.getPublicResourceOracle(), options.getOutput());
boolean generateOnShards = true;
if (!options.isEnabledGeneratingOnShards()) {
logger.log(TreeLogger.INFO, "Precompiling on the start node");
generateOnShards = false;
} else if (!linkerContext.allLinkersAreShardable()) {
TreeLogger legacyLinkersLogger =
logger.branch(TreeLogger.INFO,
"Precompiling on the start node, because some linkers are not updated");
if (legacyLinkersLogger.isLoggable(TreeLogger.INFO)) {
for (Linker linker : linkerContext.findUnshardableLinkers()) {
legacyLinkersLogger.log(TreeLogger.INFO, "Linker"
+ linker.getClass().getCanonicalName() + " is not updated");
}
}
generateOnShards = false;
} else if (options.isValidateOnly()) {
// Don't bother running on shards for just a validation run
generateOnShards = false;
}
if (generateOnShards) {
/*
* Pre-precompile. Count the permutations and plan to do a real
* precompile in the CompilePerms shards.
*/
TreeLogger branch =
logger.branch(TreeLogger.INFO, "Precompiling (minimal) module " + module.getName());
Util.writeObjectAsFile(logger, precompilationFile, options);
int numPermutations =
new PropertyCombinations(module.getProperties(), module.getActiveLinkerNames())
.collapseProperties().size();
Util.writeStringAsFile(logger, new File(compilerWorkDir, PERM_COUNT_FILENAME), String
.valueOf(numPermutations));
if (branch.isLoggable(TreeLogger.INFO)) {
branch.log(TreeLogger.INFO,
"Precompilation (minimal) succeeded, number of permutations: " + numPermutations);
}
} else {
if (options.isValidateOnly()) {
TreeLogger branch =
logger.branch(TreeLogger.INFO, "Validating compilation " + module.getName());
if (!validate(branch, compilerContext)) {
branch.log(TreeLogger.ERROR, "Validation failed");
return false;
}
branch.log(TreeLogger.INFO, "Validation succeeded");
} else {
TreeLogger branch =
logger.branch(TreeLogger.INFO, "Precompiling module " + module.getName());
Precompilation precompilation = precompile(branch, compilerContext);
if (precompilation == null) {
branch.log(TreeLogger.ERROR, "Precompilation failed");
return false;
}
// TODO: move to precompile() after params are refactored
if (!options.shouldSaveSource()) {
precompilation.removeSourceArtifacts(logger);
}
Util.writeObjectAsFile(logger, precompilationFile, precompilation);
int permsPrecompiled = precompilation.getPermutations().length;
Util.writeStringAsFile(logger, new File(compilerWorkDir, PERM_COUNT_FILENAME), String
.valueOf(permsPrecompiled));
if (branch.isLoggable(TreeLogger.INFO)) {
branch.log(TreeLogger.INFO, "Precompilation succeeded, number of permutations: "
+ permsPrecompiled);
}
}
}
}
return true;
}
}
