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// Copyright 2020 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.actions.Artifact;
import com.google.devtools.build.lib.analysis.RuleContext;
import com.google.devtools.build.lib.analysis.actions.SymlinkAction;
import com.google.devtools.build.lib.concurrent.ThreadSafety.Immutable;
import com.google.devtools.build.lib.util.FileType.HasFileType;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Objects;
import javax.annotation.Nullable;
/** Value object reused by propeller configurations that has two artifacts. */
@Immutable
public final class PropellerOptimizeInputFile implements HasFileType {
private final Artifact ccArtifact;
private final Artifact ldArtifact;
public PropellerOptimizeInputFile(Artifact ccArtifact, Artifact ldArtifact) {
Preconditions.checkArgument((ccArtifact != null) || (ldArtifact != null));
this.ccArtifact = ccArtifact;
this.ldArtifact = ldArtifact;
}
public Artifact getCcArtifact() {
return ccArtifact;
}
public Artifact getLdArtifact() {
return ldArtifact;
}
public String getBasename() {
return ccArtifact != null ? ccArtifact.getFilename() : ldArtifact.getFilename();
}
@Override
public boolean equals(Object o) {
if (this == o) {
return true;
}
if (!(o instanceof PropellerOptimizeInputFile)) {
return false;
}
PropellerOptimizeInputFile that = (PropellerOptimizeInputFile) o;
return Objects.equals(this.ccArtifact, that.ccArtifact)
&& Objects.equals(this.ldArtifact, that.ldArtifact);
}
@Override
public int hashCode() {
return Objects.hash(ccArtifact, ldArtifact);
}
public static Artifact createAbsoluteArtifact(
RuleContext ruleContext, PathFragment absolutePath) {
Artifact artifact =
ruleContext.getUniqueDirectoryArtifact(
"fdo", absolutePath.getBaseName(), ruleContext.getBinOrGenfilesDirectory());
ruleContext.registerAction(
SymlinkAction.toAbsolutePath(
ruleContext.getActionOwner(),
PathFragment.create(absolutePath.getPathString()),
artifact,
"Symlinking LLVM Propeller Profile " + absolutePath.getPathString()));
return artifact;
}
@Nullable
public static Artifact getAbsolutePathArtifact(RuleContext ruleContext, String attributeName) {
String pathString = ruleContext.getExpander().expand(attributeName);
PathFragment absolutePath = PathFragment.create(pathString);
if (!ruleContext.getFragment(CppConfiguration.class).isFdoAbsolutePathEnabled()) {
ruleContext.ruleError(
"absolute paths cannot be used when --enable_fdo_profile_absolute_path is false");
return null;
}
if (!absolutePath.isAbsolute()) {
ruleContext.attributeError(
attributeName, String.format("%s is not an absolute path", absolutePath.getPathString()));
return null;
}
return createAbsoluteArtifact(ruleContext, absolutePath);
}
@Nullable
public static PropellerOptimizeInputFile fromProfileRule(RuleContext ruleContext) {
boolean isCcProfile =
ruleContext.attributes().isAttributeValueExplicitlySpecified("cc_profile");
boolean isAbsCcProfile =
ruleContext.attributes().isAttributeValueExplicitlySpecified("absolute_cc_profile");
boolean isLdProfile =
ruleContext.attributes().isAttributeValueExplicitlySpecified("ld_profile");
boolean isAbsLdProfile =
ruleContext.attributes().isAttributeValueExplicitlySpecified("absolute_ld_profile");
if (!isCcProfile && !isLdProfile && !isAbsCcProfile && !isAbsLdProfile) {
return null;
}
if (isCcProfile && isAbsCcProfile) {
ruleContext.attributeError("cc_profile", "Both relative and absolute profiles are provided.");
}
if (isLdProfile && isAbsLdProfile) {
ruleContext.attributeError("ld_profile", "Both relative and absolute profiles are provided.");
}
Artifact ccArtifact = null;
if (isCcProfile) {
ccArtifact = ruleContext.getPrerequisiteArtifact("cc_profile");
if (!ccArtifact.isSourceArtifact()) {
ruleContext.attributeError("cc_profile", "the target is not an input file");
}
} else if (isAbsCcProfile) {
ccArtifact = getAbsolutePathArtifact(ruleContext, "absolute_cc_profile");
}
Artifact ldArtifact = null;
if (isLdProfile) {
ldArtifact = ruleContext.getPrerequisiteArtifact("ld_profile");
if (!ldArtifact.isSourceArtifact()) {
ruleContext.attributeError("ld_profile", "the target is not an input file");
}
} else if (isAbsLdProfile) {
ldArtifact = getAbsolutePathArtifact(ruleContext, "absolute_ld_profile");
}
if (ccArtifact != null || ldArtifact != null) {
return new PropellerOptimizeInputFile(ccArtifact, ldArtifact);
} else {
return null;
}
}
@Override
public String filePathForFileTypeMatcher() {
String s = "";
if (ccArtifact != null) {
s += ccArtifact.filePathForFileTypeMatcher();
}
if (ldArtifact != null) {
s += ldArtifact.filePathForFileTypeMatcher();
}
return s;
}
}