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// Copyright 2016 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 static com.google.common.truth.Truth.assertThat;
import com.google.common.collect.ImmutableMap;
import com.google.common.collect.ImmutableSet;
import com.google.devtools.build.lib.actions.AbstractAction;
import com.google.devtools.build.lib.actions.Action;
import com.google.devtools.build.lib.actions.ActionExecutionContext;
import com.google.devtools.build.lib.actions.ActionInputPrefetcher;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.actions.Executor;
import com.google.devtools.build.lib.actions.util.ActionsTestUtil;
import com.google.devtools.build.lib.analysis.Runfiles;
import com.google.devtools.build.lib.analysis.RunfilesSupplierImpl;
import com.google.devtools.build.lib.analysis.util.ActionTester;
import com.google.devtools.build.lib.analysis.util.ActionTester.ActionCombinationFactory;
import com.google.devtools.build.lib.analysis.util.AnalysisTestUtil;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import com.google.devtools.build.lib.exec.BinTools;
import com.google.devtools.build.lib.exec.util.TestExecutorBuilder;
import com.google.devtools.build.lib.util.io.FileOutErr;
import com.google.devtools.build.lib.vfs.PathFragment;
import java.util.Arrays;
import java.util.HashMap;
import java.util.Map;
import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/** Tests {@link com.google.devtools.build.lib.rules.cpp.LtoBackendAction}. */
@RunWith(JUnit4.class)
public class LtoBackendActionTest extends BuildViewTestCase {
private Artifact bitcode1Artifact;
private Artifact bitcode2Artifact;
private Artifact index1Artifact;
private Artifact index2Artifact;
private Artifact imports1Artifact;
private Artifact imports2Artifact;
private Artifact destinationArtifact;
private Map<PathFragment, Artifact> allBitcodeFiles;
private AnalysisTestUtil.CollectingAnalysisEnvironment collectingAnalysisEnvironment;
private Executor executor;
private ActionExecutionContext context;
@Before
public final void createArtifacts() throws Exception {
collectingAnalysisEnvironment =
new AnalysisTestUtil.CollectingAnalysisEnvironment(getTestAnalysisEnvironment());
bitcode1Artifact = getSourceArtifact("bitcode1.o");
bitcode2Artifact = getSourceArtifact("bitcode2.o");
index1Artifact = getSourceArtifact("bitcode1.thinlto.bc");
index2Artifact = getSourceArtifact("bitcode2.thinlto.bc");
scratch.file("bitcode1.imports");
scratch.file("bitcode2.imports", "bitcode1.o");
imports1Artifact = getSourceArtifact("bitcode1.imports");
imports2Artifact = getSourceArtifact("bitcode2.imports");
destinationArtifact = getBinArtifactWithNoOwner("output");
allBitcodeFiles = new HashMap<>();
allBitcodeFiles.put(bitcode1Artifact.getExecPath(), bitcode1Artifact);
allBitcodeFiles.put(bitcode2Artifact.getExecPath(), bitcode2Artifact);
}
@Before
public final void createExecutorAndContext() throws Exception {
BinTools binTools = BinTools.forUnitTesting(directories, analysisMock.getEmbeddedTools());
executor = new TestExecutorBuilder(fileSystem, directories, binTools).build();
context =
new ActionExecutionContext(
executor,
null,
ActionInputPrefetcher.NONE,
actionKeyContext,
null,
new FileOutErr(),
ImmutableMap.<String, String>of(),
ImmutableMap.of(),
null,
/*actionFileSystem=*/ null,
/*skyframeDepsResult=*/ null);
}
@Test
public void testEmptyImports() throws Exception {
Action[] actions =
new LtoBackendAction.Builder()
.addImportsInfo(allBitcodeFiles, imports1Artifact)
.addInput(bitcode1Artifact)
.addInput(index1Artifact)
.addOutput(destinationArtifact)
.setExecutable(scratch.file("/bin/clang").asFragment())
.setProgressMessage("Test")
.build(ActionsTestUtil.NULL_ACTION_OWNER, collectingAnalysisEnvironment, targetConfig);
collectingAnalysisEnvironment.registerAction(actions);
LtoBackendAction action = (LtoBackendAction) actions[0];
assertThat(action.getOwner().getLabel())
.isEqualTo(ActionsTestUtil.NULL_ACTION_OWNER.getLabel());
assertThat(action.getInputs()).containsExactly(bitcode1Artifact, index1Artifact);
assertThat(action.getOutputs()).containsExactly(destinationArtifact);
assertThat(action.getSpawn().getLocalResources())
.isEqualTo(AbstractAction.DEFAULT_RESOURCE_SET);
assertThat(action.getArguments()).containsExactly("/bin/clang");
assertThat(action.getProgressMessage()).isEqualTo("Test");
assertThat(action.inputsDiscovered()).isFalse();
// Discover inputs, which should not add any inputs since bitcode1.imports is empty.
action.discoverInputs(context);
assertThat(action.inputsDiscovered()).isTrue();
assertThat(action.getInputs()).containsExactly(bitcode1Artifact, index1Artifact);
}
@Test
public void testNonEmptyImports() throws Exception {
Action[] actions =
new LtoBackendAction.Builder()
.addImportsInfo(allBitcodeFiles, imports2Artifact)
.addInput(bitcode2Artifact)
.addInput(index2Artifact)
.addOutput(destinationArtifact)
.setExecutable(scratch.file("/bin/clang").asFragment())
.setProgressMessage("Test")
.build(ActionsTestUtil.NULL_ACTION_OWNER, collectingAnalysisEnvironment, targetConfig);
collectingAnalysisEnvironment.registerAction(actions);
LtoBackendAction action = (LtoBackendAction) actions[0];
assertThat(action.getOwner().getLabel())
.isEqualTo(ActionsTestUtil.NULL_ACTION_OWNER.getLabel());
assertThat(action.getInputs()).containsExactly(bitcode2Artifact, index2Artifact);
assertThat(action.getOutputs()).containsExactly(destinationArtifact);
assertThat(action.getSpawn().getLocalResources())
.isEqualTo(AbstractAction.DEFAULT_RESOURCE_SET);
assertThat(action.getArguments()).containsExactly("/bin/clang");
assertThat(action.getProgressMessage()).isEqualTo("Test");
assertThat(action.inputsDiscovered()).isFalse();
// Discover inputs, which should add bitcode1.o which is listed in bitcode2.imports.
action.discoverInputs(context);
assertThat(action.inputsDiscovered()).isTrue();
assertThat(action.getInputs())
.containsExactly(bitcode1Artifact, bitcode2Artifact, index2Artifact);
}
private enum KeyAttributes {
EXECUTABLE,
IMPORTS_INFO,
MNEMONIC,
RUNFILES_SUPPLIER,
INPUT,
FIXED_ENVIRONMENT,
VARIABLE_ENVIRONMENT
}
@Test
public void testComputeKey() throws Exception {
final Artifact artifactA = getSourceArtifact("a");
final Artifact artifactB = getSourceArtifact("b");
final Artifact artifactAimports = getSourceArtifact("a.imports");
final Artifact artifactBimports = getSourceArtifact("b.imports");
ActionTester.runTest(
KeyAttributes.class,
new ActionCombinationFactory<KeyAttributes>() {
@Override
public Action generate(ImmutableSet<KeyAttributes> attributesToFlip) {
LtoBackendAction.Builder builder = new LtoBackendAction.Builder();
builder.addOutput(destinationArtifact);
PathFragment executable =
attributesToFlip.contains(KeyAttributes.EXECUTABLE)
? artifactA.getExecPath()
: artifactB.getExecPath();
builder.setExecutable(executable);
if (attributesToFlip.contains(KeyAttributes.IMPORTS_INFO)) {
builder.addImportsInfo(new HashMap<PathFragment, Artifact>(), artifactAimports);
} else {
builder.addImportsInfo(new HashMap<PathFragment, Artifact>(), artifactBimports);
}
builder.setMnemonic(attributesToFlip.contains(KeyAttributes.MNEMONIC) ? "a" : "b");
if (attributesToFlip.contains(KeyAttributes.RUNFILES_SUPPLIER)) {
builder.addRunfilesSupplier(
new RunfilesSupplierImpl(PathFragment.create("a"), Runfiles.EMPTY, artifactA));
} else {
builder.addRunfilesSupplier(
new RunfilesSupplierImpl(PathFragment.create("a"), Runfiles.EMPTY, artifactB));
}
if (attributesToFlip.contains(KeyAttributes.INPUT)) {
builder.addInput(artifactA);
} else {
builder.addInput(artifactB);
}
Map<String, String> env = new HashMap<>();
if (attributesToFlip.contains(KeyAttributes.FIXED_ENVIRONMENT)) {
env.put("foo", "bar");
}
builder.setEnvironment(env);
if (attributesToFlip.contains(KeyAttributes.VARIABLE_ENVIRONMENT)) {
builder.setInheritedEnvironment(Arrays.asList("baz"));
}
Action[] actions =
builder.build(
ActionsTestUtil.NULL_ACTION_OWNER, collectingAnalysisEnvironment, targetConfig);
collectingAnalysisEnvironment.registerAction(actions);
return actions[0];
}
},
actionKeyContext);
}
}
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