/***
* ASM tests
* Copyright (c) 2002-2005 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.ow2.asm.test.cases;
import java.io.IOException;
import org.ow2.asm.ClassAdapter;
import org.ow2.asm.ClassReader;
import org.ow2.asm.ClassVisitor;
import org.ow2.asm.ClassWriter;
import org.ow2.asm.FieldVisitor;
import org.ow2.asm.Label;
import org.ow2.asm.MethodAdapter;
import org.ow2.asm.MethodVisitor;
/**
* Generates classes with StackMap and StackMapTable attributes. Covers all
* frame (FULL, SAME, etc.) and frame element types (TOP, NULL, INTEGER, etc.).
* Also covers the V1_6 class version.
*
* @author Eric Bruneton
*/
public class Frames extends Generator {
final static int M = ACC_STATIC;
final static String I1 = "Ljava/io/Serializable;";
final static String I2 = "Ljava/lang/Comparable;";
@Override
public void generate(final String dir) throws IOException {
byte[] b = dump();
ClassWriter cw = new ClassWriter(0);
ClassReader cr = new ClassReader(b);
cr.accept(new RenameAdapter(cw), ClassReader.EXPAND_FRAMES);
generate(dir, "pkg/FrameTable.class", b);
generate(dir, "pkg/FrameMap.class", cw.toByteArray());
}
public byte[] dump() {
ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_MAXS);
MethodVisitor mv;
FieldVisitor fv;
cw.visit(V1_6,
ACC_PUBLIC + ACC_SUPER,
"pkg/FrameTable",
null,
"java/lang/Object",
null);
fv = cw.visitField(M, "long", "Ljava/lang/Long;", null, null);
fv.visitEnd();
fv = cw.visitField(M, "double", "Ljava/lang/Double;", null, null);
fv.visitEnd();
fv = cw.visitField(M, "number", "Ljava/lang/Number;", null, null);
fv.visitEnd();
fv = cw.visitField(M, "serializable", I1, null, null);
fv.visitEnd();
fv = cw.visitField(M, "comparable", I2, null, null);
fv.visitEnd();
fv = cw.visitField(M, "longArray", "[Ljava/lang/Long;", null, null);
fv.visitEnd();
fv = cw.visitField(M, "intArray", "[I", null, null);
fv.visitEnd();
fv = cw.visitField(M, "floatArray", "[F", null, null);
fv.visitEnd();
fv = cw.visitField(M, "objectArray", "[Ljava/lang/Object;", null, null);
fv.visitEnd();
mv = cw.visitMethod(ACC_PUBLIC,
"<init>",
"(Ljava/lang/Object;)V",
null,
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
uninitializedThisType(cw);
uninitializedLocalType(cw);
uninitializedStackType(cw);
nullType(cw);
topType(cw);
arrayTypes(cw);
mergeTypes(cw);
mergeStackTypes(cw);
mergeNullArray(cw);
appendAndChopFrame(cw);
sameLocals1stackItemFrame(cw);
sameLocals1stackItemFrame2(cw);
sameLocals1stackItemFrameExtended(cw);
sameFrameExtended(cw);
deadCode(cw);
cw.visitEnd();
return cw.toByteArray();
}
private void uninitializedThisType(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"<init>",
"(I)V",
null,
null);
mv.visitCode();
mv.visitVarInsn(ALOAD, 0);
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "pkg/FrameTable");
mv.visitInsn(DUP);
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IFNE, l1);
mv.visitInsn(ACONST_NULL);
Label l2 = new Label();
mv.visitJumpInsn(GOTO, l2);
mv.visitFrame(F_FULL,
2,
new Object[] { UNINITIALIZED_THIS, INTEGER },
3,
new Object[] { UNINITIALIZED_THIS, l0, l0 });
mv.visitLabel(l1);
mv.visitTypeInsn(NEW, "java/lang/Object");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitFrame(F_FULL,
2,
new Object[] { UNINITIALIZED_THIS, INTEGER },
4,
new Object[] { UNINITIALIZED_THIS, l0, l0, "java/lang/Object" });
mv.visitLabel(l2);
mv.visitMethodInsn(INVOKESPECIAL,
"pkg/FrameTable",
"<init>",
"(Ljava/lang/Object;)V");
mv.visitMethodInsn(INVOKESPECIAL,
"pkg/FrameTable",
"<init>",
"(Ljava/lang/Object;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void uninitializedLocalType(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"uninitializedLocalType",
"(Z)V",
null,
null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "java/lang/Long");
mv.visitVarInsn(ASTORE, 2);
mv.visitVarInsn(ALOAD, 2);
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IFEQ, l1);
mv.visitInsn(LCONST_0);
Label l2 = new Label();
mv.visitJumpInsn(GOTO, l2);
mv.visitFrame(F_FULL,
3,
new Object[] { "pkg/FrameTable", INTEGER, l0 },
1,
new Object[] { l0 });
mv.visitLabel(l1);
mv.visitInsn(LCONST_1);
mv.visitFrame(F_FULL,
3,
new Object[] { "pkg/FrameTable", INTEGER, l0 },
2,
new Object[] { l0, LONG });
mv.visitLabel(l2);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Long", "<init>", "(J)V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void uninitializedStackType(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"uninitializedStackType",
"(Z)V",
null,
null);
mv.visitCode();
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "java/lang/Long");
mv.visitInsn(DUP);
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IFEQ, l1);
mv.visitInsn(LCONST_0);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Long", "<init>", "(J)V");
Label l2 = new Label();
mv.visitJumpInsn(GOTO, l2);
mv.visitFrame(F_FULL,
1,
new Object[] { "pkg/FrameTable" },
2,
new Object[] { l0, l0 });
mv.visitLabel(l1);
mv.visitInsn(LCONST_1);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Long", "<init>", "(J)V");
mv.visitFrame(F_SAME1, 0, null, 1, new Object[] { "java/lang/Long" });
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 2);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void nullType(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"nullType",
"(Ljava/lang/String;Ljava/lang/String;)V",
null,
null);
mv.visitCode();
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 2);
mv.visitVarInsn(ALOAD, 0);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ALOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFNONNULL, l0);
mv.visitVarInsn(ALOAD, 2);
Label l1 = new Label();
mv.visitJumpInsn(GOTO, l1);
mv.visitFrame(F_FULL, 3, new Object[] {
"pkg/FrameTable",
"java/lang/String",
NULL }, 2, new Object[] { "pkg/FrameTable", NULL });
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 1);
mv.visitFrame(F_FULL, 3, new Object[] {
"pkg/FrameTable",
"java/lang/String",
NULL }, 3, new Object[] {
"pkg/FrameTable",
NULL,
"java/lang/String" });
mv.visitLabel(l1);
mv.visitMethodInsn(INVOKEVIRTUAL,
"pkg/FrameTable",
"nullType",
"(Ljava/lang/String;Ljava/lang/String;)V");
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void topType(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"topType",
"(ZBCSIFJDLjava/lang/Object;)V",
null,
null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 5);
mv.visitVarInsn(ISTORE, 13);
mv.visitVarInsn(ILOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFEQ, l0);
mv.visitInsn(RETURN);
mv.visitFrame(F_APPEND, 2, new Object[] { TOP, INTEGER }, 0, null);
mv.visitLabel(l0);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void arrayTypes(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"fullFrame",
"(Ljava/lang/String;[[Z[B[C[S[I[F[J[D[Ljava/lang/Object;)V",
null,
null);
mv.visitCode();
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 11);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 13);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 15);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 17);
mv.visitVarInsn(ALOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFNONNULL, l0);
mv.visitInsn(RETURN);
mv.visitFrame(F_FULL, 15, new Object[] {
"pkg/FrameTable",
"java/lang/String",
"[[Z",
"[B",
"[C",
"[S",
"[I",
"[F",
"[J",
"[D",
"[Ljava/lang/Object;",
LONG,
LONG,
LONG,
LONG }, 0, new Object[] {});
mv.visitLabel(l0);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void mergeTypes(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"mergeTypes",
"(Z)V",
null,
null);
mv.visitCode();
Label l0 = new Label();
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"long",
"Ljava/lang/Long;");
mv.visitVarInsn(ASTORE, 2);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"number",
"Ljava/lang/Number;");
mv.visitVarInsn(ASTORE, 3);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"number",
"Ljava/lang/Long;");
mv.visitVarInsn(ASTORE, 4);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"comparable",
"Ljava/lang/Comparable;");
mv.visitVarInsn(ASTORE, 5);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 6);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"double",
"Ljava/lang/Double;");
mv.visitVarInsn(ASTORE, 7);
mv.visitInsn(ICONST_0);
mv.visitVarInsn(ISTORE, 8);
mv.visitFieldInsn(GETSTATIC, "pkg/FrameTable", "intArray", "[I");
mv.visitVarInsn(ASTORE, 9);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"double",
"Ljava/lang/Double;");
mv.visitVarInsn(ASTORE, 10);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 11);
mv.visitFrame(F_FULL, 12, new Object[] {
"pkg/FrameTable",
INTEGER,
"java/lang/Number",
"java/lang/Number",
"java/lang/Number",
"java/lang/Object",
NULL,
"java/lang/Double",
TOP,
"java/lang/Object",
"java/lang/Object",
"[Ljava/lang/Object;" }, 0, null);
mv.visitLabel(l0);
mv.visitVarInsn(ALOAD, 11);
mv.visitInsn(ICONST_0);
mv.visitInsn(ACONST_NULL);
mv.visitInsn(AASTORE);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"double",
"Ljava/lang/Double;");
mv.visitVarInsn(ASTORE, 2);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"double",
"Ljava/lang/Double;");
mv.visitVarInsn(ASTORE, 3);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"number",
"Ljava/lang/Number;");
mv.visitVarInsn(ASTORE, 4);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"serializable",
"Ljava/io/Serializable;");
mv.visitVarInsn(ASTORE, 5);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 6);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 7);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 8);
mv.visitFieldInsn(GETSTATIC, "pkg/FrameTable", "floatArray", "[F");
mv.visitVarInsn(ASTORE, 9);
mv.visitFieldInsn(GETSTATIC, "pkg/FrameTable", "intArray", "[I");
mv.visitVarInsn(ASTORE, 10);
mv.visitInsn(ICONST_1);
mv.visitTypeInsn(ANEWARRAY, "java/lang/Object");
mv.visitVarInsn(ASTORE, 11);
mv.visitJumpInsn(GOTO, l0);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void mergeStackTypes(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"mergeStackTypes",
"(Z)V",
null,
null);
mv.visitCode();
mv.visitInsn(ICONST_0);
mv.visitInsn(ICONST_1);
mv.visitVarInsn(ILOAD, 1);
Label l0 = new Label();
mv.visitJumpInsn(IFEQ, l0);
mv.visitInsn(ICONST_0);
Label l1 = new Label();
mv.visitJumpInsn(GOTO, l1);
mv.visitFrame(F_FULL,
1,
new Object[] { "pkg/FrameTable" },
2,
new Object[] { INTEGER, INTEGER });
mv.visitLabel(l0);
mv.visitInsn(DUP);
mv.visitFrame(F_FULL,
1,
new Object[] { "pkg/FrameTable" },
3,
new Object[] { INTEGER, INTEGER, INTEGER });
mv.visitLabel(l1);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void mergeNullArray(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"mergeNullArray",
"(Z)I",
null,
null);
mv.visitCode();
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IFEQ, l1);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 2);
mv.visitVarInsn(ILOAD, 1);
Label l2 = new Label();
mv.visitJumpInsn(IFEQ, l2);
mv.visitFieldInsn(GETSTATIC,
"pkg/FrameTable",
"longArray",
"[Ljava/lang/Long;");
mv.visitVarInsn(ASTORE, 2);
mv.visitFrame(F_APPEND,
1,
new Object[] { "[Ljava/lang/Long;" },
0,
null);
mv.visitLabel(l2);
mv.visitVarInsn(ALOAD, 2);
Label l3 = new Label();
mv.visitJumpInsn(IFNULL, l3);
mv.visitVarInsn(ALOAD, 2);
mv.visitInsn(ARRAYLENGTH);
Label l4 = new Label();
mv.visitJumpInsn(IFNE, l4);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l3);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 3);
Label l5 = new Label();
mv.visitJumpInsn(GOTO, l5);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l4);
mv.visitVarInsn(ALOAD, 2);
mv.visitInsn(ICONST_0);
mv.visitInsn(AALOAD);
mv.visitVarInsn(ASTORE, 3);
mv.visitVarInsn(ILOAD, 1);
mv.visitJumpInsn(IFNE, l5);
mv.visitInsn(ACONST_NULL);
mv.visitVarInsn(ASTORE, 3);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l5);
mv.visitVarInsn(ILOAD, 1);
mv.visitInsn(IRETURN);
mv.visitFrame(F_CHOP, 1, null, 0, null);
mv.visitLabel(l1);
mv.visitVarInsn(ILOAD, 1);
mv.visitInsn(IRETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void appendAndChopFrame(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"appendAndChopFrame",
"(I)V",
null,
null);
mv.visitCode();
mv.visitInsn(ICONST_0);
mv.visitVarInsn(ISTORE, 2);
mv.visitFrame(F_APPEND, 1, new Object[] { INTEGER }, 0, null);
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitVarInsn(ILOAD, 2);
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IF_ICMPGE, l1);
mv.visitIincInsn(2, 1);
mv.visitJumpInsn(GOTO, l0);
mv.visitFrame(F_CHOP, 1, null, 0, null);
mv.visitLabel(l1);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void sameLocals1stackItemFrame(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"sameLocals1stackItemFrame",
"()I",
null,
null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
mv.visitTryCatchBlock(l0, l1, l0, null);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Throwable" });
mv.visitLabel(l0);
mv.visitVarInsn(ASTORE, 1);
mv.visitLabel(l1);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void sameLocals1stackItemFrame2(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"sameLocals1stackItemFrame2",
"()V",
null,
null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, "java/lang/Exception");
Label l3 = new Label();
mv.visitTryCatchBlock(l0, l1, l3, null);
Label l4 = new Label();
mv.visitTryCatchBlock(l2, l4, l3, null);
Label l5 = new Label();
mv.visitTryCatchBlock(l3, l5, l3, null);
mv.visitLabel(l0);
mv.visitTypeInsn(NEW, "java/lang/Object");
mv.visitInsn(DUP);
mv.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V");
mv.visitVarInsn(ASTORE, 1);
mv.visitLabel(l1);
Label l6 = new Label();
mv.visitJumpInsn(GOTO, l6);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Exception" });
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 2);
mv.visitLabel(l4);
mv.visitJumpInsn(GOTO, l6);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Throwable" });
mv.visitLabel(l3);
mv.visitVarInsn(ASTORE, 3);
mv.visitLabel(l5);
mv.visitVarInsn(ALOAD, 3);
mv.visitInsn(ATHROW);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l6);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void sameLocals1stackItemFrameExtended(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"sameLocals1stackItemFrameExtended",
"()I",
null,
null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
mv.visitTryCatchBlock(l0, l1, l2, null);
Label l3 = new Label();
mv.visitTryCatchBlock(l2, l3, l2, null);
mv.visitLabel(l0);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 1);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 3);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 5);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 7);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 9);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 11);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 13);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 15);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 17);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 19);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 21);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 23);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 25);
mv.visitLabel(l1);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Throwable" });
mv.visitLabel(l2);
mv.visitVarInsn(ASTORE, 27);
mv.visitLabel(l3);
mv.visitInsn(ICONST_0);
mv.visitInsn(IRETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void sameFrameExtended(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"sameFrameExtended",
"(Z)V",
null,
null);
mv.visitCode();
mv.visitFrame(F_SAME, 0, null, 0, null);
Label l0 = new Label();
mv.visitLabel(l0);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 2);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 4);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 6);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 8);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 10);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 12);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 14);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 16);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 18);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 20);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 22);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 24);
mv.visitLdcInsn(new Long(11L));
mv.visitVarInsn(LSTORE, 26);
mv.visitVarInsn(ILOAD, 1);
Label l1 = new Label();
mv.visitJumpInsn(IFEQ, l1);
mv.visitInsn(RETURN);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l1);
mv.visitJumpInsn(GOTO, l0);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
private void deadCode(final ClassWriter cw) {
MethodVisitor mv = cw.visitMethod(ACC_PUBLIC,
"deadCode",
"(Z)V",
null,
null);
mv.visitCode();
Label l0 = new Label();
Label l1 = new Label();
Label l2 = new Label();
Label l3 = new Label();
mv.visitTryCatchBlock(l0, l1, l1, "java/lang/Exception");
mv.visitTryCatchBlock(l2, l3, l3, "java/lang/Exception");
mv.visitJumpInsn(GOTO, l2);
mv.visitFrame(F_SAME, 0, null, 0, null);
mv.visitLabel(l0);
mv.visitInsn(RETURN);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Exception" });
mv.visitLabel(l1);
mv.visitVarInsn(ASTORE, 2);
mv.visitInsn(RETURN);
mv.visitFrame(F_FULL,
0,
new Object[] { "pkg/FrameTable", INTEGER },
0,
null);
mv.visitLabel(l2);
mv.visitInsn(RETURN);
mv.visitFrame(F_SAME1,
0,
null,
1,
new Object[] { "java/lang/Exception" });
mv.visitLabel(l3);
mv.visitVarInsn(ASTORE, 2);
mv.visitInsn(RETURN);
mv.visitMaxs(0, 0);
mv.visitEnd();
}
/**
* Ad hoc class adapter used to rename the FrameTable class and to change
* its class version.
*
* @author Eric Bruneton
*/
static class RenameAdapter extends ClassAdapter {
public RenameAdapter(final ClassVisitor cv) {
super(cv);
}
@Override
public void visit(
final int version,
final int access,
final String name,
final String signature,
final String superName,
final String[] interfaces)
{
super.visit(V1_5,
access,
"pkg/FrameMap",
signature,
superName,
interfaces);
}
@Override
public MethodVisitor visitMethod(
final int access,
final String name,
final String desc,
final String signature,
final String[] exceptions)
{
return new MethodAdapter(super.visitMethod(access,
name,
desc,
signature,
exceptions))
{
@Override
public void visitFrame(
final int type,
final int nLocal,
final Object[] local,
final int nStack,
final Object[] stack)
{
Object[] clocal = new Object[local.length];
for (int i = 0; i < clocal.length; ++i) {
clocal[i] = local[i];
if ("pkg/FrameTable".equals(clocal[i])) {
clocal[i] = "pkg/FrameMap";
}
}
Object[] cstack = new Object[stack.length];
for (int i = 0; i < cstack.length; ++i) {
cstack[i] = stack[i];
if ("pkg/FrameTable".equals(cstack[i])) {
cstack[i] = "pkg/FrameMap";
}
}
super.visitFrame(type, nLocal, clocal, nStack, cstack);
}
@Override
public void visitTypeInsn(final int opcode, final String desc) {
if (desc.equals("pkg/FrameTable")) {
super.visitTypeInsn(opcode, "pkg/FrameMap");
} else {
super.visitTypeInsn(opcode, desc);
}
}
@Override
public void visitMethodInsn(
final int opcode,
final String owner,
final String name,
final String desc)
{
if (owner.equals("pkg/FrameTable")) {
super.visitMethodInsn(opcode,
"pkg/FrameMap",
name,
desc);
} else {
super.visitMethodInsn(opcode, owner, name, desc);
}
}
};
}
}
}