| // Copyright 2014 The Bazel Authors. All rights reserved. |
| // |
| // 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.devtools.build.lib.skyframe; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Supplier; |
| import com.google.common.collect.ImmutableList; |
| import com.google.common.collect.ImmutableMap; |
| import com.google.common.collect.ImmutableSet; |
| import com.google.common.collect.Iterables; |
| import com.google.common.collect.Maps; |
| import com.google.devtools.build.lib.actions.Actions; |
| import com.google.devtools.build.lib.actions.Actions.GeneratingActions; |
| import com.google.devtools.build.lib.actions.MutableActionGraph.ActionConflictException; |
| import com.google.devtools.build.lib.analysis.AspectResolver; |
| import com.google.devtools.build.lib.analysis.CachingAnalysisEnvironment; |
| import com.google.devtools.build.lib.analysis.ConfiguredAspect; |
| import com.google.devtools.build.lib.analysis.ConfiguredRuleClassProvider; |
| import com.google.devtools.build.lib.analysis.ConfiguredTarget; |
| import com.google.devtools.build.lib.analysis.ConfiguredTargetFactory; |
| import com.google.devtools.build.lib.analysis.Dependency; |
| import com.google.devtools.build.lib.analysis.DependencyResolver.InconsistentAspectOrderException; |
| import com.google.devtools.build.lib.analysis.TargetAndConfiguration; |
| import com.google.devtools.build.lib.analysis.ToolchainContext; |
| import com.google.devtools.build.lib.analysis.config.BuildConfiguration; |
| import com.google.devtools.build.lib.analysis.config.BuildOptions; |
| import com.google.devtools.build.lib.analysis.config.ConfigMatchingProvider; |
| import com.google.devtools.build.lib.analysis.config.ConfigurationResolver; |
| import com.google.devtools.build.lib.analysis.config.InvalidConfigurationException; |
| import com.google.devtools.build.lib.analysis.configuredtargets.MergedConfiguredTarget.DuplicateException; |
| import com.google.devtools.build.lib.analysis.configuredtargets.RuleConfiguredTarget; |
| import com.google.devtools.build.lib.buildeventstream.BuildEventId; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSet; |
| import com.google.devtools.build.lib.collect.nestedset.NestedSetBuilder; |
| import com.google.devtools.build.lib.collect.nestedset.Order; |
| import com.google.devtools.build.lib.events.Event; |
| import com.google.devtools.build.lib.events.StoredEventHandler; |
| import com.google.devtools.build.lib.packages.Aspect; |
| import com.google.devtools.build.lib.packages.Attribute; |
| import com.google.devtools.build.lib.packages.BuildType; |
| import com.google.devtools.build.lib.packages.NoSuchTargetException; |
| import com.google.devtools.build.lib.packages.NoSuchThingException; |
| import com.google.devtools.build.lib.packages.Package; |
| import com.google.devtools.build.lib.packages.RawAttributeMapper; |
| import com.google.devtools.build.lib.packages.Rule; |
| import com.google.devtools.build.lib.packages.RuleClassProvider; |
| import com.google.devtools.build.lib.packages.RuleTransitionFactory; |
| import com.google.devtools.build.lib.packages.Target; |
| import com.google.devtools.build.lib.packages.TargetUtils; |
| import com.google.devtools.build.lib.skyframe.AspectFunction.AspectCreationException; |
| import com.google.devtools.build.lib.skyframe.SkyframeExecutor.BuildViewProvider; |
| import com.google.devtools.build.lib.skyframe.ToolchainUtil.ToolchainContextException; |
| import com.google.devtools.build.lib.skyframe.serialization.autocodec.AutoCodec; |
| import com.google.devtools.build.lib.syntax.EvalException; |
| import com.google.devtools.build.lib.util.OrderedSetMultimap; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyFunctionException; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import com.google.devtools.build.skyframe.ValueOrException; |
| import java.util.ArrayList; |
| import java.util.Collection; |
| import java.util.HashSet; |
| import java.util.LinkedHashMap; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.Set; |
| import java.util.concurrent.Semaphore; |
| import javax.annotation.Nullable; |
| |
| /** |
| * SkyFunction for {@link ConfiguredTargetValue}s. |
| * |
| * <p>This class, together with {@link AspectFunction} drives the analysis phase. For more |
| * information, see {@link com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory}. |
| * |
| * @see com.google.devtools.build.lib.analysis.RuleConfiguredTargetFactory |
| */ |
| public final class ConfiguredTargetFunction implements SkyFunction { |
| // This construction is a bit funky, but guarantees that the Object reference here is globally |
| // unique. |
| static final ImmutableMap<Label, ConfigMatchingProvider> NO_CONFIG_CONDITIONS = |
| ImmutableMap.<Label, ConfigMatchingProvider>of(); |
| |
| /** |
| * Exception class that signals an error during the evaluation of a dependency. |
| */ |
| public static class DependencyEvaluationException extends Exception { |
| public DependencyEvaluationException(InvalidConfigurationException cause) { |
| super(cause); |
| } |
| |
| public DependencyEvaluationException(ConfiguredValueCreationException cause) { |
| super(cause); |
| } |
| |
| public DependencyEvaluationException(InconsistentAspectOrderException cause) { |
| super(cause); |
| } |
| |
| @Override |
| public synchronized Exception getCause() { |
| return (Exception) super.getCause(); |
| } |
| } |
| |
| private final BuildViewProvider buildViewProvider; |
| private final RuleClassProvider ruleClassProvider; |
| private final Semaphore cpuBoundSemaphore; |
| private final Supplier<Boolean> removeActionsAfterEvaluation; |
| private final BuildOptions defaultBuildOptions; |
| /** |
| * Indicates whether the set of packages transitively loaded for a given {@link |
| * ConfiguredTargetValue} will be needed for package root resolution later in the build. If not, |
| * they are not collected and stored. |
| */ |
| private final boolean storeTransitivePackagesForPackageRootResolution; |
| |
| private final boolean shouldUnblockCpuWorkWhenFetchingDeps; |
| |
| ConfiguredTargetFunction( |
| BuildViewProvider buildViewProvider, |
| RuleClassProvider ruleClassProvider, |
| Semaphore cpuBoundSemaphore, |
| Supplier<Boolean> removeActionsAfterEvaluation, |
| boolean storeTransitivePackagesForPackageRootResolution, |
| boolean shouldUnblockCpuWorkWhenFetchingDeps, |
| BuildOptions defaultBuildOptions) { |
| this.buildViewProvider = buildViewProvider; |
| this.ruleClassProvider = ruleClassProvider; |
| this.cpuBoundSemaphore = cpuBoundSemaphore; |
| this.removeActionsAfterEvaluation = Preconditions.checkNotNull(removeActionsAfterEvaluation); |
| this.storeTransitivePackagesForPackageRootResolution = |
| storeTransitivePackagesForPackageRootResolution; |
| this.shouldUnblockCpuWorkWhenFetchingDeps = shouldUnblockCpuWorkWhenFetchingDeps; |
| this.defaultBuildOptions = defaultBuildOptions; |
| } |
| |
| @Override |
| public SkyValue compute(SkyKey key, Environment env) throws ConfiguredTargetFunctionException, |
| InterruptedException { |
| if (shouldUnblockCpuWorkWhenFetchingDeps) { |
| env = |
| new StateInformingSkyFunctionEnvironment( |
| env, |
| /*preFetch=*/ cpuBoundSemaphore::release, |
| /*postFetch=*/ cpuBoundSemaphore::acquire); |
| } |
| SkyframeBuildView view = buildViewProvider.getSkyframeBuildView(); |
| NestedSetBuilder<Package> transitivePackagesForPackageRootResolution = |
| storeTransitivePackagesForPackageRootResolution ? NestedSetBuilder.stableOrder() : null; |
| NestedSetBuilder<Label> transitiveLoadingRootCauses = NestedSetBuilder.stableOrder(); |
| |
| ConfiguredTargetKey configuredTargetKey = (ConfiguredTargetKey) key.argument(); |
| Label label = configuredTargetKey.getLabel(); |
| BuildConfiguration configuration = null; |
| ImmutableSet<SkyKey> packageAndMaybeConfiguration; |
| SkyKey packageKey = PackageValue.key(label.getPackageIdentifier()); |
| SkyKey configurationKeyMaybe = configuredTargetKey.getConfigurationKey(); |
| if (configurationKeyMaybe == null) { |
| packageAndMaybeConfiguration = ImmutableSet.of(packageKey); |
| } else { |
| packageAndMaybeConfiguration = ImmutableSet.of(packageKey, configurationKeyMaybe); |
| } |
| Map<SkyKey, SkyValue> packageAndMaybeConfigurationValues = |
| env.getValues(packageAndMaybeConfiguration); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| PackageValue packageValue = (PackageValue) packageAndMaybeConfigurationValues.get(packageKey); |
| if (configurationKeyMaybe != null) { |
| configuration = |
| ((BuildConfigurationValue) packageAndMaybeConfigurationValues.get(configurationKeyMaybe)) |
| .getConfiguration(); |
| } |
| |
| // TODO(ulfjack): This tries to match the logic in TransitiveTargetFunction / |
| // TargetMarkerFunction. Maybe we can merge the two? |
| Package pkg = packageValue.getPackage(); |
| Target target; |
| try { |
| target = pkg.getTarget(label.getName()); |
| } catch (NoSuchTargetException e) { |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(e.getMessage(), label, configuration)); |
| } |
| if (pkg.containsErrors()) { |
| transitiveLoadingRootCauses.add(label); |
| } |
| if (transitivePackagesForPackageRootResolution != null) { |
| transitivePackagesForPackageRootResolution.add(pkg); |
| } |
| // TODO(bazel-team): This is problematic - we create the right key, but then end up with a value |
| // that doesn't match; we can even have the same value multiple times. However, I think it's |
| // only triggered in tests (i.e., in normal operation, the configuration passed in is already |
| // null). |
| if (!target.isConfigurable()) { |
| configuration = null; |
| } |
| |
| // This line is only needed for accurate error messaging. Say this target has a circular |
| // dependency with one of its deps. With this line, loading this target fails so Bazel |
| // associates the corresponding error with this target, as expected. Without this line, |
| // the first TransitiveTargetValue call happens on its dep (in trimConfigurations), so Bazel |
| // associates the error with the dep, which is misleading. |
| if (configuration != null |
| && configuration.trimConfigurations() |
| && env.getValue(TransitiveTargetKey.of(label)) == null) { |
| return null; |
| } |
| |
| TargetAndConfiguration ctgValue = new TargetAndConfiguration(target, configuration); |
| |
| SkyframeDependencyResolver resolver = view.createDependencyResolver(env); |
| |
| ToolchainContext toolchainContext = null; |
| |
| // TODO(janakr): this acquire() call may tie up this thread indefinitely, reducing the |
| // parallelism of Skyframe. This is a strict improvement over the prior state of the code, in |
| // which we ran with #processors threads, but ideally we would call #tryAcquire here, and if we |
| // failed, would exit this SkyFunction and restart it when permits were available. |
| cpuBoundSemaphore.acquire(); |
| try { |
| // Get the configuration targets that trigger this rule's configurable attributes. |
| ImmutableMap<Label, ConfigMatchingProvider> configConditions = |
| getConfigConditions( |
| ctgValue.getTarget(), |
| env, |
| resolver, |
| ctgValue, |
| transitivePackagesForPackageRootResolution, |
| transitiveLoadingRootCauses, |
| ((ConfiguredRuleClassProvider) ruleClassProvider).getTrimmingTransitionFactory()); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| // TODO(ulfjack): ConfiguredAttributeMapper (indirectly used from computeDependencies) isn't |
| // safe to use if there are missing config conditions, so we stop here, but only if there are |
| // config conditions - though note that we can't check if configConditions is non-empty - it |
| // may be empty for other reasons. It would be better to continue here so that we can collect |
| // more root causes during computeDependencies. |
| // Note that this doesn't apply to AspectFunction, because aspects can't have configurable |
| // attributes. |
| if (!transitiveLoadingRootCauses.isEmpty() && configConditions != NO_CONFIG_CONDITIONS) { |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(transitiveLoadingRootCauses.build())); |
| } |
| |
| // Determine what toolchains are needed by this target. |
| if (target instanceof Rule) { |
| Rule rule = ((Rule) target); |
| if (rule.getRuleClassObject().supportsPlatforms()) { |
| ImmutableSet<Label> requiredToolchains = |
| rule.getRuleClassObject().getRequiredToolchains(); |
| toolchainContext = |
| ToolchainUtil.createToolchainContext( |
| env, |
| rule.toString(), |
| requiredToolchains, |
| configuredTargetKey.getConfigurationKey()); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| } |
| } |
| |
| // Calculate the dependencies of this target. |
| OrderedSetMultimap<Attribute, ConfiguredTargetAndData> depValueMap = |
| computeDependencies( |
| env, |
| resolver, |
| ctgValue, |
| ImmutableList.<Aspect>of(), |
| configConditions, |
| toolchainContext, |
| ruleClassProvider, |
| view.getHostConfiguration(configuration), |
| transitivePackagesForPackageRootResolution, |
| transitiveLoadingRootCauses, |
| defaultBuildOptions); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| if (!transitiveLoadingRootCauses.isEmpty()) { |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(transitiveLoadingRootCauses.build())); |
| } |
| Preconditions.checkNotNull(depValueMap); |
| ConfiguredTargetValue ans = |
| createConfiguredTarget( |
| view, |
| env, |
| target, |
| configuration, |
| depValueMap, |
| configConditions, |
| toolchainContext, |
| transitivePackagesForPackageRootResolution); |
| return ans; |
| } catch (DependencyEvaluationException e) { |
| if (e.getCause() instanceof ConfiguredValueCreationException) { |
| ConfiguredValueCreationException cvce = (ConfiguredValueCreationException) e.getCause(); |
| |
| // Check if this is caused by an unresolved toolchain, and report it as such. |
| if (toolchainContext != null) { |
| ImmutableSet.Builder<Label> causes = new ImmutableSet.Builder<Label>(); |
| if (cvce.getAnalysisRootCause() != null) { |
| causes.add(cvce.getAnalysisRootCause()); |
| } |
| if (!cvce.getRootCauses().isEmpty()) { |
| causes.addAll(cvce.getRootCauses()); |
| } |
| Set<Label> toolchainDependencyErrors = |
| toolchainContext.filterToolchainLabels(causes.build()); |
| if (!toolchainDependencyErrors.isEmpty()) { |
| env.getListener() |
| .handle( |
| Event.error( |
| String.format( |
| "While resolving toolchains for target %s: %s", |
| target.getLabel(), e.getCause().getMessage()))); |
| } |
| } |
| |
| throw new ConfiguredTargetFunctionException(cvce); |
| } else if (e.getCause() instanceof InconsistentAspectOrderException) { |
| InconsistentAspectOrderException cause = (InconsistentAspectOrderException) e.getCause(); |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException( |
| cause.getMessage(), target.getLabel(), configuration)); |
| } else if (e.getCause() instanceof InvalidConfigurationException) { |
| InvalidConfigurationException cause = (InvalidConfigurationException) e.getCause(); |
| env.getListener().handle(Event.error(cause.getMessage())); |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException( |
| cause.getMessage(), target.getLabel(), configuration)); |
| } else { |
| // Unknown exception type. |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(e.getMessage(), target.getLabel(), configuration)); |
| } |
| } catch (AspectCreationException e) { |
| // getAnalysisRootCause may be null if the analysis of the aspect itself failed. |
| Label analysisRootCause = target.getLabel(); |
| if (e.getAnalysisRootCause() != null) { |
| analysisRootCause = e.getAnalysisRootCause(); |
| } |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(e.getMessage(), analysisRootCause, configuration)); |
| } catch (ToolchainContextException e) { |
| // We need to throw a ConfiguredValueCreationException, so either find one or make one. |
| ConfiguredValueCreationException cvce; |
| if (e.getCause() instanceof ConfiguredValueCreationException) { |
| cvce = (ConfiguredValueCreationException) e.getCause(); |
| } else { |
| cvce = |
| new ConfiguredValueCreationException( |
| e.getCause().getMessage(), target.getLabel(), configuration); |
| } |
| |
| env.getListener() |
| .handle( |
| Event.error( |
| String.format( |
| "While resolving toolchains for target %s: %s", |
| target.getLabel(), e.getCause().getMessage()))); |
| throw new ConfiguredTargetFunctionException(cvce); |
| } finally { |
| cpuBoundSemaphore.release(); |
| } |
| } |
| |
| /** |
| * Computes the direct dependencies of a node in the configured target graph (a configured target |
| * or an aspects). |
| * |
| * <p>Returns null if Skyframe hasn't evaluated the required dependencies yet. In this case, the |
| * caller should also return null to Skyframe. |
| * |
| * @param env the Skyframe environment |
| * @param resolver the dependency resolver |
| * @param ctgValue the label and the configuration of the node |
| * @param aspects |
| * @param configConditions the configuration conditions for evaluating the attributes of the node |
| * @param toolchainContext context information for required toolchains |
| * @param ruleClassProvider rule class provider for determining the right configuration fragments |
| * to apply to deps |
| * @param hostConfiguration the host configuration. There's a noticeable performance hit from |
| * instantiating this on demand for every dependency that wants it, so it's best to compute |
| * the host configuration as early as possible and pass this reference to all consumers |
| * @param defaultBuildOptions the default build options provided by the server; these are used to |
| * create diffs for {@link BuildConfigurationValue.Key}s to prevent storing the entire |
| * BuildOptions object. |
| */ |
| @Nullable |
| static OrderedSetMultimap<Attribute, ConfiguredTargetAndData> computeDependencies( |
| Environment env, |
| SkyframeDependencyResolver resolver, |
| TargetAndConfiguration ctgValue, |
| Iterable<Aspect> aspects, |
| ImmutableMap<Label, ConfigMatchingProvider> configConditions, |
| @Nullable ToolchainContext toolchainContext, |
| RuleClassProvider ruleClassProvider, |
| BuildConfiguration hostConfiguration, |
| @Nullable NestedSetBuilder<Package> transitivePackagesForPackageRootResolution, |
| NestedSetBuilder<Label> transitiveLoadingRootCauses, |
| BuildOptions defaultBuildOptions) |
| throws DependencyEvaluationException, ConfiguredTargetFunctionException, |
| AspectCreationException, InterruptedException { |
| // Create the map from attributes to set of (target, configuration) pairs. |
| OrderedSetMultimap<Attribute, Dependency> depValueNames; |
| try { |
| depValueNames = |
| resolver.dependentNodeMap( |
| ctgValue, |
| hostConfiguration, |
| aspects, |
| configConditions, |
| toolchainContext == null |
| ? ImmutableSet.of() |
| : toolchainContext.getResolvedToolchainLabels(), |
| transitiveLoadingRootCauses, |
| defaultBuildOptions, |
| ((ConfiguredRuleClassProvider) ruleClassProvider).getTrimmingTransitionFactory()); |
| } catch (EvalException e) { |
| // EvalException can only be thrown by computed Skylark attributes in the current rule. |
| env.getListener().handle(Event.error(e.getLocation(), e.getMessage())); |
| throw new DependencyEvaluationException( |
| new ConfiguredValueCreationException(e.print(), ctgValue.getLabel())); |
| } catch (InvalidConfigurationException e) { |
| throw new DependencyEvaluationException(e); |
| } catch (InconsistentAspectOrderException e) { |
| env.getListener().handle(Event.error(e.getLocation(), e.getMessage())); |
| throw new DependencyEvaluationException(e); |
| } |
| |
| // Trim each dep's configuration so it only includes the fragments needed by its transitive |
| // closure. |
| if (ctgValue.getConfiguration() != null) { |
| depValueNames = |
| ConfigurationResolver.resolveConfigurations( |
| env, |
| ctgValue, |
| depValueNames, |
| hostConfiguration, |
| ruleClassProvider, |
| defaultBuildOptions); |
| // It's important that we don't use "if (env.missingValues()) { return null }" here (or |
| // in the following lines). See the comments in getDynamicConfigurations' Skyframe call |
| // for explanation. |
| if (depValueNames == null) { |
| return null; |
| } |
| } |
| |
| // Resolve configured target dependencies and handle errors. |
| Map<SkyKey, ConfiguredTargetAndData> depValues = |
| resolveConfiguredTargetDependencies( |
| env, |
| depValueNames.values(), |
| transitivePackagesForPackageRootResolution, |
| transitiveLoadingRootCauses); |
| if (depValues == null) { |
| return null; |
| } |
| |
| // Resolve required aspects. |
| OrderedSetMultimap<Dependency, ConfiguredAspect> depAspects = |
| AspectResolver.resolveAspectDependencies( |
| env, depValues, depValueNames.values(), transitivePackagesForPackageRootResolution); |
| if (depAspects == null) { |
| return null; |
| } |
| |
| // Merge the dependent configured targets and aspects into a single map. |
| try { |
| return AspectResolver.mergeAspects(depValueNames, depValues, depAspects); |
| } catch (DuplicateException e) { |
| env.getListener().handle( |
| Event.error(ctgValue.getTarget().getLocation(), e.getMessage())); |
| |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException(e.getMessage(), ctgValue.getLabel())); |
| } |
| } |
| |
| /** |
| * Returns the set of {@link ConfigMatchingProvider}s that key the configurable attributes used by |
| * this rule. |
| * |
| * <p>>If the configured targets supplying those providers aren't yet resolved by the dependency |
| * resolver, returns null. |
| */ |
| @Nullable |
| static ImmutableMap<Label, ConfigMatchingProvider> getConfigConditions( |
| Target target, |
| Environment env, |
| SkyframeDependencyResolver resolver, |
| TargetAndConfiguration ctgValue, |
| @Nullable NestedSetBuilder<Package> transitivePackagesForPackageRootResolution, |
| NestedSetBuilder<Label> transitiveLoadingRootCauses, |
| @Nullable RuleTransitionFactory trimmingTransitionFactory) |
| throws DependencyEvaluationException, InterruptedException { |
| if (!(target instanceof Rule)) { |
| return NO_CONFIG_CONDITIONS; |
| } |
| |
| Map<Label, ConfigMatchingProvider> configConditions = new LinkedHashMap<>(); |
| |
| // Collect the labels of the configured targets we need to resolve. |
| OrderedSetMultimap<Attribute, Label> configLabelMap = OrderedSetMultimap.create(); |
| RawAttributeMapper attributeMap = RawAttributeMapper.of(((Rule) target)); |
| for (Attribute a : ((Rule) target).getAttributes()) { |
| for (Label configLabel : attributeMap.getConfigurabilityKeys(a.getName(), a.getType())) { |
| if (!BuildType.Selector.isReservedLabel(configLabel)) { |
| configLabelMap.put(a, target.getLabel().resolveRepositoryRelative(configLabel)); |
| } |
| } |
| } |
| if (configLabelMap.isEmpty()) { |
| return NO_CONFIG_CONDITIONS; |
| } |
| |
| // Collect the corresponding Skyframe configured target values. Abort early if they haven't |
| // been computed yet. |
| Collection<Dependency> configValueNames; |
| try { |
| configValueNames = resolver.resolveRuleLabels( |
| ctgValue, configLabelMap, transitiveLoadingRootCauses, trimmingTransitionFactory); |
| } catch (InconsistentAspectOrderException e) { |
| throw new DependencyEvaluationException(e); |
| } |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| // No need to get new configs from Skyframe - config_setting rules always use the current |
| // target's config. |
| // TODO(bazel-team): remove the need for this special transformation. We can probably do this by |
| // simply passing this through trimConfigurations. |
| ImmutableList.Builder<Dependency> staticConfigs = ImmutableList.builder(); |
| for (Dependency dep : configValueNames) { |
| staticConfigs.add(Dependency.withConfigurationAndAspects(dep.getLabel(), |
| ctgValue.getConfiguration(), dep.getAspects())); |
| } |
| configValueNames = staticConfigs.build(); |
| |
| Map<SkyKey, ConfiguredTargetAndData> configValues = |
| resolveConfiguredTargetDependencies( |
| env, |
| configValueNames, |
| transitivePackagesForPackageRootResolution, |
| transitiveLoadingRootCauses); |
| if (configValues == null) { |
| return null; |
| } |
| |
| // Get the configured targets as ConfigMatchingProvider interfaces. |
| for (Dependency entry : configValueNames) { |
| SkyKey baseKey = ConfiguredTargetValue.key(entry.getLabel(), entry.getConfiguration()); |
| ConfiguredTarget value = configValues.get(baseKey).getConfiguredTarget(); |
| // The code above guarantees that value is non-null here. |
| ConfigMatchingProvider provider = value.getProvider(ConfigMatchingProvider.class); |
| if (provider != null) { |
| configConditions.put(entry.getLabel(), provider); |
| } else { |
| // Not a valid provider for configuration conditions. |
| String message = |
| entry.getLabel() + " is not a valid configuration key for " + target.getLabel(); |
| env.getListener().handle(Event.error(TargetUtils.getLocationMaybe(target), message)); |
| throw new DependencyEvaluationException(new ConfiguredValueCreationException( |
| message, target.getLabel())); |
| } |
| } |
| |
| return ImmutableMap.copyOf(configConditions); |
| } |
| |
| /** |
| * Resolves the targets referenced in depValueNames and returns their {@link |
| * ConfiguredTargetAndData} instances. |
| * |
| * <p>Returns null if not all instances are available yet. |
| */ |
| @Nullable |
| private static Map<SkyKey, ConfiguredTargetAndData> resolveConfiguredTargetDependencies( |
| Environment env, |
| Collection<Dependency> deps, |
| @Nullable NestedSetBuilder<Package> transitivePackagesForPackageRootResolution, |
| NestedSetBuilder<Label> transitiveLoadingRootCauses) |
| throws DependencyEvaluationException, InterruptedException { |
| boolean missedValues = env.valuesMissing(); |
| boolean failed = false; |
| // Naively we would like to just fetch all requested ConfiguredTargets, together with their |
| // Packages. However, some ConfiguredTargets are AliasConfiguredTargets, which means that their |
| // associated Targets (and therefore associated Packages) don't correspond to their own Labels. |
| // We don't know the associated Package until we fetch the ConfiguredTarget. Therefore, we have |
| // to do a potential second pass, in which we fetch all the Packages for AliasConfiguredTargets. |
| Iterable<SkyKey> depKeys = |
| Iterables.concat( |
| Iterables.transform( |
| deps, |
| input -> ConfiguredTargetValue.key(input.getLabel(), input.getConfiguration())), |
| Iterables.transform( |
| deps, input -> PackageValue.key(input.getLabel().getPackageIdentifier()))); |
| Map<SkyKey, ValueOrException<ConfiguredValueCreationException>> depValuesOrExceptions = |
| env.getValuesOrThrow(depKeys, ConfiguredValueCreationException.class); |
| Map<SkyKey, ConfiguredTargetAndData> result = Maps.newHashMapWithExpectedSize(deps.size()); |
| Set<SkyKey> aliasPackagesToFetch = new HashSet<>(); |
| List<Dependency> aliasDepsToRedo = new ArrayList<>(); |
| Map<SkyKey, SkyValue> aliasPackageValues = null; |
| Collection<Dependency> depsToProcess = deps; |
| for (int i = 0; i < 2; i++) { |
| for (Dependency dep : depsToProcess) { |
| SkyKey key = ConfiguredTargetValue.key(dep.getLabel(), dep.getConfiguration()); |
| try { |
| ConfiguredTargetValue depValue = |
| (ConfiguredTargetValue) depValuesOrExceptions.get(key).get(); |
| |
| if (depValue == null) { |
| missedValues = true; |
| } else { |
| ConfiguredTarget depCt = depValue.getConfiguredTarget(); |
| Label depLabel = depCt.getLabel(); |
| SkyKey packageKey = PackageValue.key(depLabel.getPackageIdentifier()); |
| PackageValue pkgValue; |
| if (i == 0) { |
| ValueOrException<ConfiguredValueCreationException> packageResult = |
| depValuesOrExceptions.get(packageKey); |
| if (packageResult == null) { |
| aliasPackagesToFetch.add(packageKey); |
| aliasDepsToRedo.add(dep); |
| continue; |
| } else { |
| pkgValue = |
| Preconditions.checkNotNull( |
| (PackageValue) packageResult.get(), |
| "Package should have been loaded during dep resolution: %s", |
| dep); |
| } |
| } else { |
| // We were doing AliasConfiguredTarget mop-up. |
| pkgValue = (PackageValue) aliasPackageValues.get(packageKey); |
| if (pkgValue == null) { |
| // This is unexpected: on the second iteration, all packages should be present, |
| // since the configured targets that depend on them are present. But since that is |
| // not a guarantee Skyframe makes, we tolerate their absence. |
| missedValues = true; |
| continue; |
| } |
| } |
| try { |
| result.put( |
| key, |
| new ConfiguredTargetAndData( |
| depValue.getConfiguredTarget(), |
| pkgValue.getPackage().getTarget(depLabel.getName()), |
| dep.getConfiguration())); |
| } catch (NoSuchTargetException e) { |
| throw new IllegalStateException("Target already verified for " + dep, e); |
| } |
| if (transitivePackagesForPackageRootResolution != null) { |
| transitivePackagesForPackageRootResolution.addTransitive( |
| depValue.getTransitivePackagesForPackageRootResolution()); |
| } |
| } |
| } catch (ConfiguredValueCreationException e) { |
| // TODO(ulfjack): If there is an analysis root cause, we drop all loading root causes. |
| if (e.getAnalysisRootCause() != null) { |
| throw new DependencyEvaluationException(e); |
| } |
| transitiveLoadingRootCauses.addTransitive(e.loadingRootCauses); |
| failed = true; |
| } |
| } |
| if (aliasDepsToRedo.isEmpty()) { |
| break; |
| } |
| aliasPackageValues = env.getValues(aliasPackagesToFetch); |
| depsToProcess = aliasDepsToRedo; |
| } |
| if (missedValues) { |
| return null; |
| } else if (failed) { |
| throw new DependencyEvaluationException( |
| new ConfiguredValueCreationException(transitiveLoadingRootCauses.build())); |
| } else { |
| return result; |
| } |
| } |
| |
| @Override |
| public String extractTag(SkyKey skyKey) { |
| return Label.print(((ConfiguredTargetKey) skyKey.argument()).getLabel()); |
| } |
| |
| @Nullable |
| private ConfiguredTargetValue createConfiguredTarget( |
| SkyframeBuildView view, |
| Environment env, |
| Target target, |
| BuildConfiguration configuration, |
| OrderedSetMultimap<Attribute, ConfiguredTargetAndData> depValueMap, |
| ImmutableMap<Label, ConfigMatchingProvider> configConditions, |
| @Nullable ToolchainContext toolchainContext, |
| @Nullable NestedSetBuilder<Package> transitivePackagesForPackageRootResolution) |
| throws ConfiguredTargetFunctionException, InterruptedException { |
| StoredEventHandler events = new StoredEventHandler(); |
| BuildConfiguration ownerConfig = |
| ConfiguredTargetFactory.getArtifactOwnerConfiguration( |
| env, configuration, defaultBuildOptions); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| CachingAnalysisEnvironment analysisEnvironment = |
| view.createAnalysisEnvironment( |
| ConfiguredTargetKey.of(target.getLabel(), ownerConfig), |
| false, |
| events, |
| env, |
| configuration); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| Preconditions.checkNotNull(depValueMap); |
| ConfiguredTarget configuredTarget; |
| try { |
| configuredTarget = |
| view.createConfiguredTarget( |
| target, |
| configuration, |
| analysisEnvironment, |
| depValueMap, |
| configConditions, |
| toolchainContext); |
| } catch (ActionConflictException e) { |
| throw new ConfiguredTargetFunctionException(e); |
| } |
| |
| events.replayOn(env.getListener()); |
| if (events.hasErrors()) { |
| analysisEnvironment.disable(target); |
| throw new ConfiguredTargetFunctionException( |
| new ConfiguredValueCreationException( |
| "Analysis of target '" + target.getLabel() + "' failed; build aborted", |
| target.getLabel(), |
| configuration)); |
| } |
| Preconditions.checkState(!analysisEnvironment.hasErrors(), |
| "Analysis environment hasError() but no errors reported"); |
| if (env.valuesMissing()) { |
| return null; |
| } |
| |
| analysisEnvironment.disable(target); |
| Preconditions.checkNotNull(configuredTarget, target); |
| |
| if (configuredTarget instanceof RuleConfiguredTarget) { |
| RuleConfiguredTarget ruleConfiguredTarget = (RuleConfiguredTarget) configuredTarget; |
| return new RuleConfiguredTargetValue( |
| ruleConfiguredTarget, |
| transitivePackagesForPackageRootResolution == null |
| ? null |
| : transitivePackagesForPackageRootResolution.build(), |
| removeActionsAfterEvaluation.get()); |
| } else { |
| GeneratingActions generatingActions; |
| // Check for conflicting actions within this configured target (that indicates a bug in the |
| // rule implementation). |
| try { |
| generatingActions = |
| Actions.filterSharedActionsAndThrowActionConflict( |
| analysisEnvironment.getActionKeyContext(), |
| analysisEnvironment.getRegisteredActions()); |
| } catch (ActionConflictException e) { |
| throw new ConfiguredTargetFunctionException(e); |
| } |
| return new NonRuleConfiguredTargetValue( |
| configuredTarget, |
| generatingActions, |
| transitivePackagesForPackageRootResolution == null |
| ? null |
| : transitivePackagesForPackageRootResolution.build(), |
| removeActionsAfterEvaluation.get()); |
| } |
| } |
| |
| /** |
| * An exception indicating that there was a problem during the construction of a |
| * ConfiguredTargetValue. |
| */ |
| @AutoCodec |
| public static final class ConfiguredValueCreationException extends Exception { |
| private final NestedSet<Label> loadingRootCauses; |
| // TODO(ulfjack): Collect all analysis root causes, not just the first one. |
| @Nullable private final Label analysisRootCause; |
| @Nullable private final BuildEventId configuration; |
| |
| private ConfiguredValueCreationException( |
| String message, Label currentTarget, BuildConfiguration configuration) { |
| this( |
| message, |
| Preconditions.checkNotNull(currentTarget), |
| NestedSetBuilder.<Label>emptySet(Order.STABLE_ORDER), |
| configuration == null ? null : configuration.getEventId()); |
| } |
| |
| @AutoCodec.VisibleForSerialization |
| @AutoCodec.Instantiator |
| ConfiguredValueCreationException( |
| String message, |
| Label analysisRootCause, |
| NestedSet<Label> loadingRootCauses, |
| BuildEventId configuration) { |
| super(message); |
| this.loadingRootCauses = loadingRootCauses; |
| this.analysisRootCause = analysisRootCause; |
| this.configuration = configuration; |
| } |
| |
| private ConfiguredValueCreationException(String message, Label currentTarget) { |
| this(message, currentTarget, /*configuration=*/ null); |
| } |
| |
| private ConfiguredValueCreationException(String message, NestedSet<Label> rootCauses) { |
| this(message, /*analysisRootCause=*/ null, rootCauses, /*configuration=*/ null); |
| } |
| |
| private ConfiguredValueCreationException(NestedSet<Label> rootCauses) { |
| this("Loading failed", rootCauses); |
| } |
| |
| public NestedSet<Label> getRootCauses() { |
| return loadingRootCauses; |
| } |
| |
| public Label getAnalysisRootCause() { |
| return analysisRootCause; |
| } |
| |
| public BuildEventId getConfiguration() { |
| return configuration; |
| } |
| } |
| |
| /** |
| * Used to declare all the exception types that can be wrapped in the exception thrown by |
| * {@link ConfiguredTargetFunction#compute}. |
| */ |
| public static final class ConfiguredTargetFunctionException extends SkyFunctionException { |
| public ConfiguredTargetFunctionException(NoSuchThingException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| private ConfiguredTargetFunctionException(ConfiguredValueCreationException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| |
| private ConfiguredTargetFunctionException(ActionConflictException e) { |
| super(e, Transience.PERSISTENT); |
| } |
| } |
| } |
