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comparison test/runtime/8003720/Asmator.java @ 7179:d0aa87f04bd5

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8003720: NPG: Method in interpreter stack frame can be deallocated Summary: Pass down a closure during root scanning to keep the class of the method alive. Reviewed-by: coleenp, jcoomes
author stefank
date Tue, 27 Nov 2012 10:13:20 +0100
parents
children dad48145e775
comparison
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7178:19c1bd641922 7179:d0aa87f04bd5
1 import com.sun.xml.internal.ws.org.objectweb.asm.*;
2
3 class Asmator {
4 static byte[] fixup(byte[] buf) throws java.io.IOException {
5 ClassReader cr = new ClassReader(buf);
6 ClassWriter cw = new ClassWriter(0) {
7 public MethodVisitor visitMethod(
8 final int access,
9 final String name,
10 final String desc,
11 final String signature,
12 final String[] exceptions)
13 {
14 MethodVisitor mv = super.visitMethod(access,
15 name,
16 desc,
17 signature,
18 exceptions);
19 if (mv == null) return null;
20 if (name.equals("callme")) {
21 // make receiver go dead!
22 mv.visitInsn(Opcodes.ACONST_NULL);
23 mv.visitVarInsn(Opcodes.ASTORE, 0);
24 }
25 return mv;
26 }
27 };
28 cr.accept(cw, 0);
29 return cw.toByteArray();
30 }
31 }