/***
* ASM Guide
* Copyright (c) 2007 Eric Bruneton
* 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 ch3.sec3;
import static org.objectweb.asm.Opcodes.ACC_INTERFACE;
import static org.objectweb.asm.Opcodes.ACC_PUBLIC;
import static org.objectweb.asm.Opcodes.ACC_STATIC;
import static org.objectweb.asm.Opcodes.ATHROW;
import static org.objectweb.asm.Opcodes.GETSTATIC;
import static org.objectweb.asm.Opcodes.INVOKESTATIC;
import static org.objectweb.asm.Opcodes.IRETURN;
import static org.objectweb.asm.Opcodes.LADD;
import static org.objectweb.asm.Opcodes.LLOAD;
import static org.objectweb.asm.Opcodes.LSTORE;
import static org.objectweb.asm.Opcodes.LSUB;
import static org.objectweb.asm.Opcodes.PUTSTATIC;
import static org.objectweb.asm.Opcodes.RETURN;
import org.objectweb.asm.ClassAdapter;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.FieldVisitor;
import org.objectweb.asm.MethodAdapter;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Type;
import org.objectweb.asm.commons.AnalyzerAdapter;
import org.objectweb.asm.commons.LocalVariablesSorter;
/**
* ASM Guide example class.
*
* @author Eric Bruneton
*/
public class AddTimerAdapter5 extends ClassAdapter {
private String owner;
private boolean isInterface;
public AddTimerAdapter5(ClassVisitor cv) {
super(cv);
}
public void visit(int version, int access, String name,
String signature, String superName, String[] interfaces) {
cv.visit(version, access, name, signature, superName, interfaces);
owner = name;
isInterface = (access & ACC_INTERFACE) != 0;
}
public MethodVisitor visitMethod(int access, String name,
String desc, String signature, String[] exceptions) {
MethodVisitor mv = cv.visitMethod(access, name, desc, signature,
exceptions);
if (!isInterface && mv != null && !name.equals("<init>")) {
AddTimerMethodAdapter5 at = new AddTimerMethodAdapter5(mv);
at.aa = new AnalyzerAdapter(owner, access, name, desc, at);
at.lvs = new LocalVariablesSorter(access, desc, at.aa);
return at.lvs;
}
return mv;
}
public void visitEnd() {
if (!isInterface) {
FieldVisitor fv = cv.visitField(ACC_PUBLIC + ACC_STATIC, "timer",
"J", null, null);
if (fv != null) {
fv.visitEnd();
}
cv.visitEnd();
}
}
class AddTimerMethodAdapter5 extends MethodAdapter {
public LocalVariablesSorter lvs;
public AnalyzerAdapter aa;
private int time;
private int maxStack;
public AddTimerMethodAdapter5(MethodVisitor mv) {
super(mv);
}
public void visitCode() {
mv.visitCode();
mv.visitMethodInsn(INVOKESTATIC, "java/lang/System",
"currentTimeMillis", "()J");
time = lvs.newLocal(Type.LONG_TYPE);
mv.visitVarInsn(LSTORE, time);
maxStack = 4;
}
public void visitInsn(int opcode) {
if ((opcode >= IRETURN && opcode <= RETURN) || opcode == ATHROW) {
mv.visitMethodInsn(INVOKESTATIC, "java/lang/System",
"currentTimeMillis", "()J");
mv.visitVarInsn(LLOAD, time);
mv.visitInsn(LSUB);
mv.visitFieldInsn(GETSTATIC, owner, "timer", "J");
mv.visitInsn(LADD);
mv.visitFieldInsn(PUTSTATIC, owner, "timer", "J");
maxStack = Math.max(aa.stack.size() + 4, maxStack);
}
mv.visitInsn(opcode);
}
public void visitMaxs(int maxStack, int maxLocals) {
mv.visitMaxs(Math.max(this.maxStack, maxStack), maxLocals);
}
}
}