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/*
* Copyright 2016 Google Inc. 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.turbine.bytecode.sig;
import static com.google.common.collect.ImmutableList.toImmutableList;
import static com.google.common.io.MoreFiles.getFileExtension;
import static com.google.common.truth.Truth.assertThat;
import com.google.common.base.Splitter;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.Streams;
import org.objectweb.asm.Opcodes;
import java.io.File;
import java.io.IOException;
import java.io.UncheckedIOException;
import java.net.URI;
import java.nio.file.FileSystem;
import java.nio.file.FileSystems;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.HashMap;
import java.util.Map;
import java.util.Optional;
import java.util.function.Consumer;
import java.util.stream.Stream;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.junit.runners.JUnit4;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodVisitor;
/**
* Reads all field, class, and method signatures in the bootclasspath, and round-trips them through
* {@link SigWriter} and {@link SigParser}.
*/
@RunWith(JUnit4.class)
public class SigIntegrationTest {
private static final Splitter CLASS_PATH_SPLITTER =
Splitter.on(File.pathSeparatorChar).omitEmptyStrings();
void forEachBootclass(Consumer<Path> consumer) throws IOException {
ImmutableList<Path> bootclasspath =
Streams.stream(
CLASS_PATH_SPLITTER.split(
Optional.ofNullable(System.getProperty("sun.boot.class.path")).orElse("")))
.map(Paths::get)
.filter(Files::exists)
.collect(toImmutableList());
if (!bootclasspath.isEmpty()) {
for (Path path : bootclasspath) {
Map<String, ?> env = new HashMap<>();
try (FileSystem jarfs = FileSystems.newFileSystem(URI.create("jar:" + path.toUri()), env);
Stream<Path> stream = Files.walk(jarfs.getPath("/"))) {
stream
.filter(Files::isRegularFile)
.filter(p -> getFileExtension(p).equals("class"))
.forEachOrdered(consumer);
}
}
return;
}
{
Map<String, ?> env = new HashMap<>();
try (FileSystem fileSystem = FileSystems.newFileSystem(URI.create("jrt:/"), env);
Stream<Path> stream = Files.walk(fileSystem.getPath("/modules"))) {
stream.filter(p -> getFileExtension(p).equals("class")).forEachOrdered(consumer);
}
}
}
@Test
public void roundTrip() throws Exception {
int[] totalSignatures = {0};
forEachBootclass(
path -> {
try {
new ClassReader(Files.newInputStream(path))
.accept(
new ClassVisitor(Opcodes.ASM9) {
@Override
public void visit(
int version,
int access,
String name,
String signature,
String superName,
String[] interfaces) {
if (signature != null) {
assertThat(SigWriter.classSig(new SigParser(signature).parseClassSig()))
.isEqualTo(signature);
totalSignatures[0]++;
}
}
@Override
public FieldVisitor visitField(
int access, String name, String desc, String signature, Object value) {
if (signature != null) {
assertThat(SigWriter.type(new SigParser(signature).parseFieldSig()))
.isEqualTo(signature);
totalSignatures[0]++;
}
return super.visitField(access, name, desc, signature, value);
}
@Override
public MethodVisitor visitMethod(
int access,
String name,
String desc,
String signature,
String[] exceptions) {
if (signature != null) {
assertThat(SigWriter.method(new SigParser(signature).parseMethodSig()))
.isEqualTo(signature);
totalSignatures[0]++;
}
return super.visitMethod(access, name, desc, signature, exceptions);
}
},
ClassReader.SKIP_CODE | ClassReader.SKIP_FRAMES | ClassReader.SKIP_DEBUG);
} catch (IOException e) {
throw new UncheckedIOException(e);
}
});
// sanity-check that the bootclasspath contains a plausible number of signatures; 8u60 has >18k
assertThat(totalSignatures[0]).isGreaterThan(10000);
}
}
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