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/*
* Copyright (c) 2015, 2025, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package compiler.jvmci.common;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.Label;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;
import org.objectweb.asm.tree.ClassNode;
import jdk.test.lib.Utils;
import jdk.vm.ci.code.InstalledCode;
import jdk.vm.ci.meta.ResolvedJavaMethod;
import jdk.vm.ci.hotspot.CompilerToVMHelper;
import jdk.vm.ci.hotspot.HotSpotNmethod;
import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.Executable;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.lang.reflect.Modifier;
import java.lang.reflect.Parameter;
import java.util.HashMap;
import java.util.Map;
import java.util.TreeMap;
public class CTVMUtilities {
/*
* A method to return HotSpotResolvedJavaMethod object using class object
* and method as input
*/
public static HotSpotResolvedJavaMethod getResolvedMethod(Class<?> cls,
Executable method) {
if (!(method instanceof Method || method instanceof Constructor)) {
throw new Error("wrong executable type " + method.getClass());
}
return CompilerToVMHelper.asResolvedJavaMethod(method);
}
public static HotSpotResolvedJavaMethod getResolvedMethod(
Executable method) {
return getResolvedMethod(method.getDeclaringClass(), method);
}
public static InstalledCode getInstalledCode(ResolvedJavaMethod method, String name, long address, long entryPoint) {
return CompilerToVMHelper.getInstalledCode(method, name, address, entryPoint);
}
public static Map<Integer, Integer> getBciToLineNumber(Executable method) {
Map<Integer, Integer> lineNumbers = new TreeMap<>();
Class<?> aClass = method.getDeclaringClass();
ClassReader cr;
try {
Module aModule = aClass.getModule();
String name = aClass.getName();
cr = new ClassReader(aModule.getResourceAsStream(
name.replace('.', '/') + ".class"));
} catch (IOException e) {
throw new Error("TEST BUG: can read " + aClass.getName() + " : " + e, e);
}
ClassNode cn = new ClassNode();
cr.accept(cn, ClassReader.EXPAND_FRAMES);
Map<Label, Integer> labels = new HashMap<>();
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES);
ClassVisitor cv = new ClassVisitorForLabels(cw, labels, method);
cr.accept(cv, ClassReader.EXPAND_FRAMES);
labels.forEach((k, v) -> lineNumbers.put(k.getOffset(), v));
boolean isEmptyMethod = Modifier.isAbstract(method.getModifiers())
|| Modifier.isNative(method.getModifiers());
if (lineNumbers.isEmpty() && !isEmptyMethod) {
throw new Error(method + " doesn't contains the line numbers table "
+"(the method marked neither abstract nor native)");
}
return lineNumbers;
}
private static class ClassVisitorForLabels extends ClassVisitor {
private final Map<Label, Integer> lineNumbers;
private final String targetName;
private final String targetDesc;
public ClassVisitorForLabels(ClassWriter cw, Map<Label, Integer> lines,
Executable target) {
super(Opcodes.ASM7, cw);
this.lineNumbers = lines;
StringBuilder builder = new StringBuilder("(");
for (Parameter parameter : target.getParameters()) {
builder.append(Utils.toJVMTypeSignature(parameter.getType()));
}
builder.append(")");
if (target instanceof Constructor) {
targetName = "<init>";
builder.append("V");
} else {
targetName = target.getName();
builder.append(Utils.toJVMTypeSignature(
((Method) target).getReturnType()));
}
targetDesc = builder.toString();
}
@Override
public final MethodVisitor visitMethod(int access, String name,
String desc, String signature,
String[] exceptions) {
MethodVisitor mv = cv.visitMethod(access, name, desc, signature,
exceptions);
if (targetDesc.equals(desc) && targetName.equals(name)) {
return new MethodVisitor(Opcodes.ASM7, mv) {
@Override
public void visitLineNumber(int i, Label label) {
super.visitLineNumber(i, label);
lineNumbers.put(label, i);
}
};
}
return mv;
}
}
}
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