| // Copyright 2018 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.bazel.rules.cpp; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.actions.Artifact; |
| import com.google.devtools.build.lib.analysis.skylark.BazelStarlarkContext; |
| import com.google.devtools.build.lib.analysis.skylark.SkylarkActionFactory; |
| import com.google.devtools.build.lib.analysis.skylark.SkylarkRuleContext; |
| import com.google.devtools.build.lib.cmdline.Label; |
| import com.google.devtools.build.lib.events.Location; |
| import com.google.devtools.build.lib.packages.RuleClass.ConfiguredTargetFactory.RuleErrorException; |
| import com.google.devtools.build.lib.rules.cpp.CcCommon; |
| import com.google.devtools.build.lib.rules.cpp.CcCompilationContext; |
| import com.google.devtools.build.lib.rules.cpp.CcCompilationOutputs; |
| import com.google.devtools.build.lib.rules.cpp.CcLinkingHelper; |
| import com.google.devtools.build.lib.rules.cpp.CcLinkingOutputs; |
| import com.google.devtools.build.lib.rules.cpp.CcModule; |
| import com.google.devtools.build.lib.rules.cpp.CcToolchainConfigInfo; |
| import com.google.devtools.build.lib.rules.cpp.CcToolchainProvider; |
| import com.google.devtools.build.lib.rules.cpp.CcToolchainVariables; |
| import com.google.devtools.build.lib.rules.cpp.CppConfiguration; |
| import com.google.devtools.build.lib.rules.cpp.CppRuleClasses; |
| import com.google.devtools.build.lib.rules.cpp.CppSemantics; |
| import com.google.devtools.build.lib.rules.cpp.FdoContext; |
| import com.google.devtools.build.lib.rules.cpp.FeatureConfigurationForStarlark; |
| import com.google.devtools.build.lib.rules.cpp.LibraryToLink; |
| import com.google.devtools.build.lib.rules.cpp.LibraryToLink.CcLinkingContext; |
| import com.google.devtools.build.lib.rules.cpp.Link.LinkTargetType; |
| import com.google.devtools.build.lib.rules.cpp.Link.LinkingMode; |
| import com.google.devtools.build.lib.skylarkbuildapi.cpp.BazelCcModuleApi; |
| import com.google.devtools.build.lib.skylarkinterface.StarlarkContext; |
| import com.google.devtools.build.lib.syntax.Environment; |
| import com.google.devtools.build.lib.syntax.EvalException; |
| import com.google.devtools.build.lib.syntax.SkylarkList; |
| import com.google.devtools.build.lib.syntax.SkylarkList.Tuple; |
| import java.util.stream.Stream; |
| |
| /** |
| * A module that contains Skylark utilities for C++ support. |
| * |
| * <p>This is a work in progress. The API is guarded behind |
| * --experimental_cc_skylark_api_enabled_packages. The API is under development and unstable. |
| */ |
| public class BazelCcModule extends CcModule |
| implements BazelCcModuleApi< |
| SkylarkActionFactory, |
| Artifact, |
| SkylarkRuleContext, |
| CcToolchainProvider, |
| FeatureConfigurationForStarlark, |
| CcCompilationContext, |
| CcCompilationOutputs, |
| CcLinkingOutputs, |
| LibraryToLink, |
| CcLinkingContext, |
| CcToolchainVariables, |
| CcToolchainConfigInfo> { |
| private static final ImmutableList<String> SUPPORTED_OUTPUT_TYPES = |
| ImmutableList.of("executable", "dynamic_library"); |
| |
| private enum Language { |
| CPP("c++"), |
| OBJC("objc"), |
| OBJCPP("objc++"); |
| |
| private final String representation; |
| |
| Language(String representation) { |
| this.representation = representation; |
| } |
| |
| public String getRepresentation() { |
| return representation; |
| } |
| } |
| |
| @Override |
| public CppSemantics getSemantics() { |
| return BazelCppSemantics.INSTANCE; |
| } |
| |
| @Override |
| public Tuple<Object> compile( |
| SkylarkActionFactory skylarkActionFactoryApi, |
| FeatureConfigurationForStarlark skylarkFeatureConfiguration, |
| CcToolchainProvider skylarkCcToolchainProvider, |
| SkylarkList<Artifact> sources, |
| SkylarkList<Artifact> publicHeaders, |
| SkylarkList<Artifact> privateHeaders, |
| SkylarkList<String> includes, |
| SkylarkList<String> quoteIncludes, |
| SkylarkList<String> systemIncludes, |
| SkylarkList<String> defines, |
| SkylarkList<String> userCompileFlags, |
| SkylarkList<CcCompilationContext> ccCompilationContexts, |
| String name, |
| boolean disallowPicOutputs, |
| boolean disallowNopicOutputs, |
| Location location, |
| Environment environment) |
| throws EvalException { |
| return compile( |
| skylarkActionFactoryApi, |
| skylarkFeatureConfiguration, |
| skylarkCcToolchainProvider, |
| sources, |
| publicHeaders, |
| privateHeaders, |
| includes, |
| quoteIncludes, |
| systemIncludes, |
| defines, |
| userCompileFlags, |
| ccCompilationContexts, |
| name, |
| disallowPicOutputs, |
| disallowNopicOutputs, |
| /* grepIncludes= */ null, |
| SkylarkList.createImmutable(ImmutableList.of()), |
| location, |
| environment); |
| } |
| |
| @Override |
| public Tuple<Object> createLinkingContextFromCompilationOutputs( |
| SkylarkActionFactory skylarkActionFactoryApi, |
| FeatureConfigurationForStarlark skylarkFeatureConfiguration, |
| CcToolchainProvider skylarkCcToolchainProvider, |
| CcCompilationOutputs compilationOutputs, |
| SkylarkList<String> userLinkFlags, |
| SkylarkList<CcLinkingContext> linkingContexts, |
| String name, |
| String language, |
| boolean alwayslink, |
| SkylarkList<Artifact> additionalInputs, |
| boolean disallowStaticLibraries, |
| boolean disallowDynamicLibraries, |
| Location location, |
| Environment environment, |
| StarlarkContext starlarkContext) |
| throws InterruptedException, EvalException { |
| CcCommon.checkLocationWhitelisted( |
| environment.getSemantics(), |
| location, |
| environment.getGlobals().getLabel().getPackageIdentifier().toString()); |
| validateLanguage(location, language); |
| SkylarkActionFactory actions = skylarkActionFactoryApi; |
| CcToolchainProvider ccToolchainProvider = convertFromNoneable(skylarkCcToolchainProvider, null); |
| FeatureConfigurationForStarlark featureConfiguration = |
| convertFromNoneable(skylarkFeatureConfiguration, null); |
| Label label = getCallerLabel(location, environment, name); |
| FdoContext fdoContext = ccToolchainProvider.getFdoContext(); |
| LinkTargetType staticLinkTargetType = null; |
| if (language.equals(Language.CPP.getRepresentation())) { |
| staticLinkTargetType = LinkTargetType.STATIC_LIBRARY; |
| } else if (language.equals(Language.OBJC.getRepresentation()) |
| || language.equals(Language.OBJCPP.getRepresentation())) { |
| staticLinkTargetType = LinkTargetType.OBJC_ARCHIVE; |
| } else { |
| throw new IllegalStateException("Language is not valid."); |
| } |
| CcLinkingHelper helper = |
| new CcLinkingHelper( |
| actions.getActionConstructionContext().getRuleErrorConsumer(), |
| label, |
| actions.asActionRegistry(location, actions), |
| actions.getActionConstructionContext(), |
| BazelCppSemantics.INSTANCE, |
| featureConfiguration.getFeatureConfiguration(), |
| ccToolchainProvider, |
| fdoContext, |
| actions.getActionConstructionContext().getConfiguration(), |
| actions |
| .getActionConstructionContext() |
| .getConfiguration() |
| .getFragment(CppConfiguration.class), |
| ((BazelStarlarkContext) starlarkContext).getSymbolGenerator()) |
| .addNonCodeLinkerInputs(additionalInputs) |
| .setShouldCreateStaticLibraries(!disallowStaticLibraries) |
| .setShouldCreateDynamicLibrary( |
| !disallowDynamicLibraries |
| && !featureConfiguration |
| .getFeatureConfiguration() |
| .isEnabled(CppRuleClasses.TARGETS_WINDOWS)) |
| .setStaticLinkType(staticLinkTargetType) |
| .setDynamicLinkType(LinkTargetType.NODEPS_DYNAMIC_LIBRARY) |
| .addLinkopts(userLinkFlags); |
| try { |
| CcLinkingOutputs ccLinkingOutputs = CcLinkingOutputs.EMPTY; |
| ImmutableList<LibraryToLink> libraryToLink = ImmutableList.of(); |
| if (!compilationOutputs.isEmpty()) { |
| ccLinkingOutputs = helper.link(compilationOutputs); |
| if (!ccLinkingOutputs.isEmpty()) { |
| libraryToLink = |
| ImmutableList.of( |
| ccLinkingOutputs.getLibraryToLink().toBuilder() |
| .setAlwayslink(alwayslink) |
| .build()); |
| } |
| } |
| CcLinkingContext linkingContext = |
| helper.buildCcLinkingContextFromLibrariesToLink( |
| libraryToLink, CcCompilationContext.EMPTY); |
| return Tuple.of( |
| CcLinkingContext.merge( |
| ImmutableList.<CcLinkingContext>builder() |
| .add(linkingContext) |
| .addAll(linkingContexts) |
| .build()), |
| ccLinkingOutputs); |
| } catch (RuleErrorException e) { |
| throw new EvalException(location, e); |
| } |
| } |
| |
| @Override |
| public CcLinkingOutputs link( |
| SkylarkActionFactory actions, |
| FeatureConfigurationForStarlark skylarkFeatureConfiguration, |
| CcToolchainProvider skylarkCcToolchainProvider, |
| CcCompilationOutputs compilationOutputs, |
| SkylarkList<String> userLinkFlags, |
| SkylarkList<CcLinkingContext> linkingContexts, |
| String name, |
| String language, |
| String outputType, |
| boolean linkDepsStatically, |
| SkylarkList<Artifact> additionalInputs, |
| Location location, |
| Environment environment, |
| StarlarkContext starlarkContext) |
| throws InterruptedException, EvalException { |
| CcCommon.checkLocationWhitelisted( |
| environment.getSemantics(), |
| location, |
| environment.getGlobals().getLabel().getPackageIdentifier().toString()); |
| validateLanguage(location, language); |
| validateOutputType(location, outputType); |
| CcToolchainProvider ccToolchainProvider = convertFromNoneable(skylarkCcToolchainProvider, null); |
| FeatureConfigurationForStarlark featureConfiguration = |
| convertFromNoneable(skylarkFeatureConfiguration, null); |
| Label label = getCallerLabel(location, environment, name); |
| FdoContext fdoContext = ccToolchainProvider.getFdoContext(); |
| LinkTargetType dynamicLinkTargetType = null; |
| if (language.equals(Language.CPP.getRepresentation())) { |
| if (outputType.equals("executable")) { |
| dynamicLinkTargetType = LinkTargetType.EXECUTABLE; |
| } else if (outputType.equals("dynamic_library")) { |
| dynamicLinkTargetType = LinkTargetType.DYNAMIC_LIBRARY; |
| } |
| } else if (language.equals(Language.OBJC.getRepresentation()) |
| && outputType.equals("executable")) { |
| dynamicLinkTargetType = LinkTargetType.OBJC_EXECUTABLE; |
| } else if (language.equals(Language.OBJCPP.getRepresentation()) |
| && outputType.equals("executable")) { |
| dynamicLinkTargetType = LinkTargetType.OBJCPP_EXECUTABLE; |
| } else { |
| throw new EvalException( |
| location, "Language '" + language + "' does not support " + outputType); |
| } |
| |
| CcLinkingHelper helper = |
| new CcLinkingHelper( |
| actions.getActionConstructionContext().getRuleErrorConsumer(), |
| label, |
| actions.asActionRegistry(location, actions), |
| actions.getActionConstructionContext(), |
| BazelCppSemantics.INSTANCE, |
| featureConfiguration.getFeatureConfiguration(), |
| ccToolchainProvider, |
| fdoContext, |
| actions.getActionConstructionContext().getConfiguration(), |
| actions |
| .getActionConstructionContext() |
| .getConfiguration() |
| .getFragment(CppConfiguration.class), |
| ((BazelStarlarkContext) starlarkContext).getSymbolGenerator()) |
| .setLinkingMode(linkDepsStatically ? LinkingMode.STATIC : LinkingMode.DYNAMIC) |
| .addNonCodeLinkerInputs(additionalInputs) |
| .setDynamicLinkType(dynamicLinkTargetType) |
| .addCcLinkingContexts(linkingContexts) |
| .addLinkopts(userLinkFlags); |
| try { |
| CcLinkingOutputs ccLinkingOutputs = CcLinkingOutputs.EMPTY; |
| if (!compilationOutputs.isEmpty()) { |
| ccLinkingOutputs = helper.link(compilationOutputs); |
| } |
| return ccLinkingOutputs; |
| } catch (RuleErrorException e) { |
| throw new EvalException(location, e); |
| } |
| } |
| |
| private void validateLanguage(Location location, String language) throws EvalException { |
| if (!Stream.of(Language.values()) |
| .map(Language::getRepresentation) |
| .collect(ImmutableList.toImmutableList()) |
| .contains(language)) { |
| throw new EvalException(location, "Language '" + language + "' is not supported"); |
| } |
| } |
| |
| private void validateOutputType(Location location, String outputType) throws EvalException { |
| if (!SUPPORTED_OUTPUT_TYPES.contains(outputType)) { |
| throw new EvalException(location, "Output type '" + outputType + "' is not supported"); |
| } |
| } |
| } |
