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// Copyright 2015 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.base.Predicate;
import com.google.common.collect.Iterables;
import com.google.devtools.build.lib.actions.Artifact;
import com.google.devtools.build.lib.analysis.ConfiguredTarget;
import com.google.devtools.build.lib.analysis.FileProvider;
import com.google.devtools.build.lib.analysis.util.BuildViewTestCase;
import java.util.List;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
/**
* Test for shared library linking {@link CppLinkAction}.
*/
@RunWith(JUnit4.class)
public final class LibraryLinkingTest extends BuildViewTestCase {
private List<String> getLinkOpts(CppLinkAction linkAction, String... optionPatterns)
throws Exception {
// Strip the first parameters from the argv, which are the dynamic library script
// (usually tools/cpp/link_dynamic_library.sh), and its arguments.
return linkAction.getArguments().subList(6, optionPatterns.length + 6);
}
private void assertLinkopts(CppLinkAction linkAction, String... optionPatterns) throws Exception {
List<String> linkopts = getLinkOpts(linkAction, optionPatterns);
for (int i = 0; i < optionPatterns.length; i++) {
assertThat(linkopts.get(i)).matches(optionPatterns[i]);
}
}
@Test
public void testGeneratedLib() throws Exception {
useConfiguration("--cpu=k8");
ConfiguredTarget genlib =
scratchConfiguredTarget(
"genrule",
"thebinary.so",
"genrule(name = 'genlib',",
" outs = ['genlib.a'],",
" cmd = '')",
"cc_library(name = 'thelib',",
" srcs = [':genlib'],",
" linkstatic = 1)",
"cc_binary(name = 'thebinary.so',",
" deps = [':thelib'],",
" linkstatic = 1,",
" linkshared = 1)");
Artifact executable = getExecutable(genlib);
CppLinkAction linkAction = (CppLinkAction) getGeneratingAction(executable);
assertLinkopts(
linkAction,
"-shared",
"-o",
analysisMock.getProductName() + "-out/.+/genrule/thebinary.so",
"-Wl,-whole-archive",
analysisMock.getProductName() + "-out/.+/genrule/genlib.a",
"-Wl,-no-whole-archive");
}
/**
* Tests that the shared library version of a cc_library includes linkopts settings
* in its link command line, but the archive library version doesn't.
*/
@Test
public void testCcLibraryLinkopts() throws Exception {
scratch.overwriteFile(
"custom_malloc/BUILD",
"cc_library(name = 'custom_malloc',",
" srcs = ['custom_malloc.cc'],",
" linkopts = ['-Lmalloc_dir -lmalloc_opt']);");
ConfiguredTarget ccLib = getConfiguredTarget("//custom_malloc:custom_malloc");
final String linkOpt1 = "-Lmalloc_dir";
final String linkOpt2 = "-lmalloc_opt";
// Archive library version:
Artifact archiveLib =
Iterables.getOnlyElement(
Iterables.filter(
ccLib.getProvider(FileProvider.class).getFilesToBuild(),
new Predicate<Artifact>() {
@Override
public boolean apply(Artifact artifact) {
return artifact.getFilename().equals("libcustom_malloc.a");
}
}));
CppLinkAction archiveLink = (CppLinkAction) getGeneratingAction(archiveLib);
List<String> args = archiveLink.getArguments();
assertThat(args).doesNotContain(linkOpt1);
assertThat(args).doesNotContain(linkOpt2);
// Shared library version:
Artifact soLib =
Iterables.getOnlyElement(
ccLib
.get(CcExecutionDynamicLibrariesInfo.PROVIDER)
.getExecutionDynamicLibraryArtifacts());
// This artifact is generated by a SolibSymlinkAction, so we need to go back two levels.
CppLinkAction solibLink =
(CppLinkAction) getGeneratingAction(getGeneratingAction(soLib).getPrimaryInput());
args = solibLink.getArguments();
assertThat(args).contains(linkOpt1);
assertThat(args).contains(linkOpt2);
}
}
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