| // 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.base.Preconditions; |
| import com.google.devtools.build.lib.analysis.BlazeDirectories; |
| import com.google.devtools.build.lib.vfs.Path; |
| import com.google.devtools.build.skyframe.SkyFunction; |
| import com.google.devtools.build.skyframe.SkyKey; |
| import com.google.devtools.build.skyframe.SkyValue; |
| import javax.annotation.Nullable; |
| |
| /** |
| * A {@link SkyFunction} that does things for FDO that a regular configured target is not allowed |
| * to. |
| * |
| * <p>This only exists because the value of {@code --fdo_optimize} can be a workspace-relative path |
| * and thus we need to depend on {@link BlazeDirectories} somehow, which neither the configuration |
| * nor the analysis phase can "officially" do. |
| * |
| * <p>The fix is probably to make it possible for {@link |
| * com.google.devtools.build.lib.analysis.actions.SymlinkAction} to create workspace-relative |
| * symlinks because action execution can hopefully depend on {@link BlazeDirectories}. |
| * |
| * <p>There is also the awful and incorrect {@link Path#exists()} call in {@link |
| * com.google.devtools.build.lib.view.proto.CcProtoProfileProvider#getProfile( |
| * com.google.devtools.build.lib.analysis.RuleContext)} which needs a {@link Path}. |
| */ |
| public class CcSkyframeFdoSupportFunction implements SkyFunction { |
| |
| private final BlazeDirectories directories; |
| |
| public CcSkyframeFdoSupportFunction(BlazeDirectories directories) { |
| this.directories = Preconditions.checkNotNull(directories); |
| } |
| |
| @Nullable |
| @Override |
| public SkyValue compute(SkyKey skyKey, Environment env) throws InterruptedException { |
| CcSkyframeFdoSupportValue.Key key = (CcSkyframeFdoSupportValue.Key) skyKey.argument(); |
| Path fdoZipPath = null; |
| if (key.getFdoZipPath() != null) { |
| fdoZipPath = directories.getWorkspace().getRelative(key.getFdoZipPath()); |
| } |
| return new CcSkyframeFdoSupportValue(fdoZipPath); |
| } |
| |
| @Nullable |
| @Override |
| public String extractTag(SkyKey skyKey) { |
| return null; |
| } |
| } |