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// ASM: a very small and fast Java bytecode manipulation framework
// Copyright (c) 2000-2011 INRIA, France Telecom
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions
// are met:
// 1. Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in the
// documentation and/or other materials provided with the distribution.
// 3. Neither the name of the copyright holders nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
// THE POSSIBILITY OF SUCH DAMAGE.
package org.objectweb.asm.commons;
import static org.junit.jupiter.api.Assertions.assertDoesNotThrow;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertThrows;
import static org.junit.jupiter.api.Assertions.assertTrue;
import java.util.ArrayList;
import org.junit.jupiter.api.function.Executable;
import org.junit.jupiter.params.ParameterizedTest;
import org.junit.jupiter.params.provider.MethodSource;
import org.objectweb.asm.Attribute;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.ConstantDynamic;
import org.objectweb.asm.Handle;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.test.AsmTest;
import org.objectweb.asm.test.ClassFile;
/**
* Unit tests for {@link CodeSizeEvaluator}.
*
* @author Eric Bruneton
*/
class CodeSizeEvaluatorTest extends AsmTest {
/**
* Tests that the size estimations of CodeSizeEvaluator are correct, and that classes are
* unchanged with a ClassReader->CodeSizeEvaluator->ClassWriter transform.
*/
@ParameterizedTest
@MethodSource(ALL_CLASSES_AND_ALL_APIS)
void testAllMethods_precompiledClass(
final PrecompiledClass classParameter, final Api apiParameter) {
byte[] classFile = classParameter.getBytes();
ClassReader classReader = new ClassReader(classFile);
ClassWriter classWriter = new ClassWriter(0);
ArrayList<CodeSizeEvaluation> evaluations = new ArrayList<>();
ClassVisitor codeSizesEvaluator =
new CodeSizesEvaluator(apiParameter.value(), classWriter, evaluations);
Executable accept = () -> classReader.accept(codeSizesEvaluator, attributes(), 0);
if (classParameter.isMoreRecentThan(apiParameter)) {
Exception exception = assertThrows(UnsupportedOperationException.class, accept);
assertTrue(exception.getMessage().matches(UNSUPPORTED_OPERATION_MESSAGE_PATTERN));
} else {
assertDoesNotThrow(accept);
for (CodeSizeEvaluation evaluation : evaluations) {
assertTrue(evaluation.actualSize >= evaluation.minSize);
assertTrue(evaluation.actualSize <= evaluation.maxSize);
}
assertEquals(new ClassFile(classFile), new ClassFile(classWriter.toByteArray()));
}
}
private static Attribute[] attributes() {
return new Attribute[] {new Comment(), new CodeComment()};
}
static class CodeSizeEvaluation {
final int minSize;
final int maxSize;
final int actualSize;
CodeSizeEvaluation(final int minSize, final int maxSize, final int actualSize) {
this.minSize = minSize;
this.maxSize = maxSize;
this.actualSize = actualSize;
}
}
static class CodeSizesEvaluator extends ClassVisitor {
private final ArrayList<CodeSizeEvaluation> evaluations;
CodeSizesEvaluator(
final int api,
final ClassWriter classWriter,
final ArrayList<CodeSizeEvaluation> evaluations) {
super(api, classWriter);
this.evaluations = evaluations;
}
@Override
public MethodVisitor visitMethod(
final int access,
final String name,
final String descriptor,
final String signature,
final String[] exceptions) {
MethodVisitor methodVisitor =
super.visitMethod(access, name, descriptor, signature, exceptions);
return new CodeSizeEvaluator(api, methodVisitor) {
@Override
public void visitLdcInsn(final Object value) {
if (value instanceof Boolean
|| value instanceof Byte
|| value instanceof Short
|| value instanceof Character
|| value instanceof Integer
|| value instanceof Long
|| value instanceof Double
|| value instanceof Float
|| value instanceof String
|| value instanceof Type
|| value instanceof Handle
|| value instanceof ConstantDynamic) {
super.visitLdcInsn(value);
} else {
// If this happens, add support for the new type in
// CodeSizeEvaluator.visitLdcInsn(), if needed.
throw new IllegalArgumentException("Unsupported type of value: " + value);
}
}
@Override
public void visitMaxs(final int maxStack, final int maxLocals) {
Label end = new Label();
visitLabel(end);
super.visitMaxs(maxStack, maxLocals);
evaluations.add(new CodeSizeEvaluation(getMinSize(), getMaxSize(), end.getOffset()));
}
};
}
}
}
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