1 /******************************************************************************* 2 * Copyright (c) 2009, 2018 Mountainminds GmbH & Co. KG and Contributors 3 * All rights reserved. This program and the accompanying materials 4 * are made available under the terms of the Eclipse Public License v1.0 5 * which accompanies this distribution, and is available at 6 * http://www.eclipse.org/legal/epl-v10.html 7 * 8 * Contributors: 9 * Marc R. Hoffmann - initial API and implementation 10 * 11 *******************************************************************************/ 12 package org.jacoco.core.internal.instr; 13 14 import org.objectweb.asm.Handle; 15 import org.objectweb.asm.Label; 16 import org.objectweb.asm.MethodVisitor; 17 18 /** 19 * Eliminates consecutive stackmap frame definitions which causes ASM to create 20 * invalid class files. This situation occurs when the original class files 21 * contains additional stackmap frames at unexpected offsets, which is case for 22 * some class files compiled with ECJ. 23 */ 24 class DuplicateFrameEliminator extends MethodVisitor { 25 26 private boolean instruction; 27 28 public DuplicateFrameEliminator(final MethodVisitor mv) { 29 super(InstrSupport.ASM_API_VERSION, mv); 30 instruction = true; 31 } 32 33 @Override 34 public void visitFrame(final int type, final int nLocal, 35 final Object[] local, final int nStack, final Object[] stack) { 36 if (instruction) { 37 instruction = false; 38 mv.visitFrame(type, nLocal, local, nStack, stack); 39 } 40 } 41 42 @Override 43 public void visitInsn(final int opcode) { 44 instruction = true; 45 mv.visitInsn(opcode); 46 } 47 48 @Override 49 public void visitIntInsn(final int opcode, final int operand) { 50 instruction = true; 51 mv.visitIntInsn(opcode, operand); 52 } 53 54 @Override 55 public void visitVarInsn(final int opcode, final int var) { 56 instruction = true; 57 mv.visitVarInsn(opcode, var); 58 } 59 60 @Override 61 public void visitTypeInsn(final int opcode, final String type) { 62 instruction = true; 63 mv.visitTypeInsn(opcode, type); 64 } 65 66 @Override 67 public void visitFieldInsn(final int opcode, final String owner, 68 final String name, final String desc) { 69 instruction = true; 70 mv.visitFieldInsn(opcode, owner, name, desc); 71 } 72 73 @Override 74 public void visitMethodInsn(final int opcode, final String owner, 75 final String name, final String desc, final boolean itf) { 76 instruction = true; 77 mv.visitMethodInsn(opcode, owner, name, desc, itf); 78 } 79 80 @Override 81 public void visitInvokeDynamicInsn(final String name, final String desc, 82 final Handle bsm, final Object... bsmArgs) { 83 instruction = true; 84 mv.visitInvokeDynamicInsn(name, desc, bsm, bsmArgs); 85 } 86 87 @Override 88 public void visitJumpInsn(final int opcode, final Label label) { 89 instruction = true; 90 mv.visitJumpInsn(opcode, label); 91 } 92 93 @Override 94 public void visitLdcInsn(final Object cst) { 95 instruction = true; 96 mv.visitLdcInsn(cst); 97 } 98 99 @Override 100 public void visitIincInsn(final int var, final int increment) { 101 instruction = true; 102 mv.visitIincInsn(var, increment); 103 } 104 105 @Override 106 public void visitTableSwitchInsn(final int min, final int max, 107 final Label dflt, final Label... labels) { 108 instruction = true; 109 mv.visitTableSwitchInsn(min, max, dflt, labels); 110 } 111 112 @Override 113 public void visitLookupSwitchInsn(final Label dflt, final int[] keys, 114 final Label[] labels) { 115 instruction = true; 116 mv.visitLookupSwitchInsn(dflt, keys, labels); 117 } 118 119 @Override 120 public void visitMultiANewArrayInsn(final String desc, final int dims) { 121 instruction = true; 122 mv.visitMultiANewArrayInsn(desc, dims); 123 } 124 125 } 126
