| // 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.rules.cpp; |
| |
| import com.google.common.collect.ImmutableList; |
| import com.google.devtools.build.lib.actions.Artifact; |
| 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.concurrent.ThreadSafety.Immutable; |
| import java.util.Objects; |
| |
| /** |
| * A struct that stores .dwo files which can be combined into a .dwp in the packaging step. See |
| * https://gcc.gnu.org/wiki/DebugFission for details. |
| */ |
| @Immutable |
| public final class CcDebugInfoContext { |
| |
| public static final CcDebugInfoContext EMPTY = |
| new CcDebugInfoContext( |
| /* transitiveDwoFiles= */ NestedSetBuilder.emptySet(Order.STABLE_ORDER), |
| /* transitivePicDwoFiles= */ NestedSetBuilder.emptySet(Order.STABLE_ORDER)); |
| private final NestedSet<Artifact> transitiveDwoFiles; |
| private final NestedSet<Artifact> transitivePicDwoFiles; |
| |
| public CcDebugInfoContext( |
| NestedSet<Artifact> transitiveDwoFiles, NestedSet<Artifact> transitivePicDwoFiles) { |
| this.transitiveDwoFiles = transitiveDwoFiles; |
| this.transitivePicDwoFiles = transitivePicDwoFiles; |
| } |
| |
| /** Merge multiple {@link CcDebugInfoContext}s into one. */ |
| public static CcDebugInfoContext merge(ImmutableList<CcDebugInfoContext> contexts) { |
| NestedSetBuilder<Artifact> transitiveDwoFiles = NestedSetBuilder.stableOrder(); |
| NestedSetBuilder<Artifact> transitivePicDwoFiles = NestedSetBuilder.stableOrder(); |
| |
| for (CcDebugInfoContext context : contexts) { |
| transitiveDwoFiles.addTransitive(context.getTransitiveDwoFiles()); |
| transitivePicDwoFiles.addTransitive(context.getTransitivePicDwoFiles()); |
| } |
| |
| return new CcDebugInfoContext(transitiveDwoFiles.build(), transitivePicDwoFiles.build()); |
| } |
| |
| public static CcDebugInfoContext from(CcCompilationOutputs outputs) { |
| return new CcDebugInfoContext( |
| NestedSetBuilder.wrap(Order.STABLE_ORDER, outputs.getDwoFiles()), |
| NestedSetBuilder.wrap(Order.STABLE_ORDER, outputs.getPicDwoFiles())); |
| } |
| |
| /** |
| * Returns the .dwo files that should be included in this target's .dwp packaging (if this |
| * target is linked) or passed through to a dependant's .dwp packaging (e.g. if this is a |
| * cc_library depended on by a statically linked cc_binary). |
| * |
| * Assumes the corresponding link consumes .o files (vs. .pic.o files). |
| */ |
| public NestedSet<Artifact> getTransitiveDwoFiles() { |
| return transitiveDwoFiles; |
| } |
| |
| /** |
| * Same as above, but assumes the corresponding link consumes pic.o files. |
| */ |
| public NestedSet<Artifact> getTransitivePicDwoFiles() { |
| return transitivePicDwoFiles; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (this == o) { |
| return true; |
| } |
| if (o == null || getClass() != o.getClass()) { |
| return false; |
| } |
| CcDebugInfoContext that = (CcDebugInfoContext) o; |
| return Objects.equals(transitiveDwoFiles, that.transitiveDwoFiles) |
| && Objects.equals(transitivePicDwoFiles, that.transitivePicDwoFiles); |
| } |
| |
| @Override |
| public int hashCode() { |
| return Objects.hash(transitiveDwoFiles, transitivePicDwoFiles); |
| } |
| } |