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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;
import static java.util.stream.Collectors.toSet;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTimeoutPreemptively;
import java.time.Duration;
import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;
import org.junit.jupiter.api.Test;
/**
* Unit tests for {@link MethodWriter}.
*
* @author Eric Bruneton
*/
class MethodWriterTest {
/**
* Tests that the attribute name fields of Constants are the expected ones. This test is designed
* to fail each time new attributes are added to Constants, and serves as a reminder to update the
* {@link MethodWriter#canCopyMethodAttributes} method, if needed.
*/
@Test
void testCanCopyMethodAttributesUpdated() {
Set<Object> actualAttributes =
Arrays.stream(Constants.class.getDeclaredFields())
.filter(field -> field.getType() == String.class)
.map(
field -> {
try {
return field.get(null);
} catch (IllegalArgumentException | IllegalAccessException e) {
throw new RuntimeException("Can't get field value", e);
}
})
.collect(toSet());
HashSet<String> expectedAttributes =
new HashSet<String>(
Arrays.asList(
Constants.CONSTANT_VALUE,
Constants.CODE,
Constants.STACK_MAP_TABLE,
Constants.EXCEPTIONS,
Constants.INNER_CLASSES,
Constants.ENCLOSING_METHOD,
Constants.SYNTHETIC,
Constants.SIGNATURE,
Constants.SOURCE_FILE,
Constants.SOURCE_DEBUG_EXTENSION,
Constants.LINE_NUMBER_TABLE,
Constants.LOCAL_VARIABLE_TABLE,
Constants.LOCAL_VARIABLE_TYPE_TABLE,
Constants.DEPRECATED,
Constants.RUNTIME_VISIBLE_ANNOTATIONS,
Constants.RUNTIME_INVISIBLE_ANNOTATIONS,
Constants.RUNTIME_VISIBLE_PARAMETER_ANNOTATIONS,
Constants.RUNTIME_INVISIBLE_PARAMETER_ANNOTATIONS,
Constants.RUNTIME_VISIBLE_TYPE_ANNOTATIONS,
Constants.RUNTIME_INVISIBLE_TYPE_ANNOTATIONS,
Constants.ANNOTATION_DEFAULT,
Constants.BOOTSTRAP_METHODS,
Constants.METHOD_PARAMETERS,
Constants.MODULE,
Constants.MODULE_PACKAGES,
Constants.MODULE_MAIN_CLASS,
Constants.NEST_HOST,
Constants.NEST_MEMBERS,
Constants.PERMITTED_SUBCLASSES,
Constants.RECORD));
// IMPORTANT: if this fails, update the list AND update MethodWriter.canCopyMethodAttributes(),
// if needed.
assertEquals(expectedAttributes, actualAttributes);
}
@Test
void testRecursiveCondyFastEnough() {
Handle bsm =
new Handle(
Opcodes.H_INVOKESTATIC,
"RT",
"bsm",
"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;I)Ljava/lang/invoke/CallSite;",
false);
ConstantDynamic chain = new ConstantDynamic("condy", "I", bsm, 0);
for (int i = 0; i < 32; i++) {
chain = new ConstantDynamic("condy" + i, "I", bsm, chain);
}
ConstantDynamic condy = chain;
assertTimeoutPreemptively(
Duration.ofMillis(1_000),
() -> {
ClassWriter classWriter = new ClassWriter(0);
classWriter.visit(Opcodes.V11, Opcodes.ACC_SUPER, "Test", null, "java/lang/Object", null);
MethodVisitor mv = classWriter.visitMethod(Opcodes.ACC_STATIC, "m", "()V", null, null);
mv.visitCode();
mv.visitLdcInsn(condy);
mv.visitMaxs(0, 0);
mv.visitEnd();
classWriter.visitEnd();
classWriter.toByteArray();
});
}
}
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