Java Code Examples for org.apache.bcel.Const#IFEQ
The following examples show how to use
org.apache.bcel.Const#IFEQ .
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Example 1
Source File: WaitInLoop.java From spotbugs with GNU Lesser General Public License v2.1 | 6 votes |
@Override public void sawOpcode(int seen) { if ((seen == Const.INVOKEVIRTUAL || seen == Const.INVOKEINTERFACE) && "notify".equals(getNameConstantOperand()) && "()V".equals(getSigConstantOperand())) { sawNotify = true; notifyPC = getPC(); } if (!(sawWait || sawAwait) && (seen == Const.INVOKEVIRTUAL || seen == Const.INVOKEINTERFACE) && (isMonitorWait() || isConditionAwait())) { if ("wait".equals(getNameConstantOperand())) { sawWait = true; } else { sawAwait = true; } waitHasTimeout = !"()V".equals(getSigConstantOperand()); waitAt = getPC(); earliestJump = getPC() + 1; return; } if (seen >= Const.IFEQ && seen <= Const.GOTO || seen >= Const.IFNULL && seen <= Const.GOTO_W) { earliestJump = Math.min(earliestJump, getBranchTarget()); } }
Example 2
Source File: DismantleBytecode.java From spotbugs with GNU Lesser General Public License v2.1 | 5 votes |
public void printOpCode(int seen) { System.out.print(" " + this.getClass().getSimpleName() + ": [" + formatter.format(getPC()) + "] " + Const.getOpcodeName(seen)); if ((seen == Const.INVOKEVIRTUAL) || (seen == Const.INVOKESPECIAL) || (seen == Const.INVOKEINTERFACE) || (seen == Const.INVOKESTATIC)) { System.out.print(" " + getClassConstantOperand() + "." + getNameConstantOperand() + " " + getSigConstantOperand()); } else if (seen == Const.LDC || seen == Const.LDC_W || seen == Const.LDC2_W) { Constant c = getConstantRefOperand(); if (c instanceof ConstantString) { System.out.print(" \"" + getStringConstantOperand() + "\""); } else if (c instanceof ConstantClass) { System.out.print(" " + getClassConstantOperand()); } else { System.out.print(" " + c); } } else if ((seen == Const.ALOAD) || (seen == Const.ASTORE)) { System.out.print(" " + getRegisterOperand()); } else if ((seen == Const.GOTO) || (seen == Const.GOTO_W) || (seen == Const.IF_ACMPEQ) || (seen == Const.IF_ACMPNE) || (seen == Const.IF_ICMPEQ) || (seen == Const.IF_ICMPGE) || (seen == Const.IF_ICMPGT) || (seen == Const.IF_ICMPLE) || (seen == Const.IF_ICMPLT) || (seen == Const.IF_ICMPNE) || (seen == Const.IFEQ) || (seen == Const.IFGE) || (seen == Const.IFGT) || (seen == Const.IFLE) || (seen == Const.IFLT) || (seen == Const.IFNE) || (seen == Const.IFNONNULL) || (seen == Const.IFNULL)) { System.out.print(" " + getBranchTarget()); } else if ((seen == Const.NEW) || (seen == Const.INSTANCEOF)) { System.out.print(" " + getClassConstantOperand()); } else if ((seen == Const.TABLESWITCH) || (seen == Const.LOOKUPSWITCH)) { System.out.print(" ["); int switchPC = getPC(); int[] offsets = getSwitchOffsets(); for (int offset : offsets) { System.out.print((switchPC + offset) + ","); } System.out.print((switchPC + getDefaultSwitchOffset()) + "]"); } System.out.println(); }
Example 3
Source File: DismantleBytecode.java From spotbugs with GNU Lesser General Public License v2.1 | 5 votes |
public static boolean areOppositeBranches(int opcode1, int opcode2) { if (!isBranch(opcode1)) { throw new IllegalArgumentException(Const.getOpcodeName(opcode1) + " isn't a branch"); } if (!isBranch(opcode2)) { throw new IllegalArgumentException(Const.getOpcodeName(opcode2) + " isn't a branch"); } switch (opcode1) { case Const.IF_ACMPEQ: case Const.IF_ACMPNE: case Const.IF_ICMPEQ: case Const.IF_ICMPNE: case Const.IF_ICMPLT: case Const.IF_ICMPLE: case Const.IF_ICMPGT: case Const.IF_ICMPGE: case Const.IFNE: case Const.IFEQ: case Const.IFLT: case Const.IFLE: case Const.IFGT: case Const.IFGE: return ((opcode1 + 1) ^ 1) == opcode2 + 1; case Const.IFNONNULL: return opcode2 == Const.IFNULL; case Const.IFNULL: return opcode2 == Const.IFNONNULL; default: return false; } }
Example 4
Source File: FindNullDerefsInvolvingNonShortCircuitEvaluation.java From spotbugs with GNU Lesser General Public License v2.1 | 5 votes |
@Override public void sawOpcode(int seen) { if (seen == Const.IAND || seen == Const.IOR) { int nextOpcode = getCodeByte(getPC() + 1); if (nextOpcode == Const.IFEQ || nextOpcode == Const.IFNE) { OpcodeStack.Item left = stack.getStackItem(1); OpcodeStack.Item right = stack.getStackItem(0); checkForNullForcingABranch(seen, nextOpcode, left); checkForNullForcingABranch(seen, nextOpcode, right); } } }
Example 5
Source File: QuestionableBooleanAssignment.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
@Override public void sawOpcode(int seen) { if (seen == Const.GOTO && getBranchOffset() == 4) { state = SEEN_GOTO; } else { switch (state) { case SEEN_NOTHING: if ((seen == Const.ICONST_1) || (seen == Const.ICONST_0)) { state = SEEN_ICONST_0_OR_1; } break; case SEEN_ICONST_0_OR_1: if (seen == Const.DUP) { state = SEEN_DUP; } else { state = SEEN_NOTHING; } break; case SEEN_DUP: if (((seen >= Const.ISTORE_0) && (seen <= Const.ISTORE_3)) || (seen == Const.ISTORE)) { state = SEEN_ISTORE; } else { state = SEEN_NOTHING; } break; case SEEN_ISTORE: if (seen == Const.IFEQ || seen == Const.IFNE) { bug = new BugInstance(this, "QBA_QUESTIONABLE_BOOLEAN_ASSIGNMENT", HIGH_PRIORITY).addClassAndMethod(this) .addSourceLine(this); state = SEEN_IF; } else { state = SEEN_NOTHING; } break; case SEEN_IF: state = SEEN_NOTHING; if (seen == Const.NEW) { String cName = getClassConstantOperand(); if ("java/lang/AssertionError".equals(cName)) { break; } } bugReporter.reportBug(bug); break; case SEEN_GOTO: state = SEEN_NOTHING; break; default: break; } } }
Example 6
Source File: FindSpinLoop.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
@Override public void sawOpcode(int seen) { // System.out.println("PC: " + PC + ", stage: " + stage1); switch (seen) { case Const.ALOAD_0: case Const.ALOAD_1: case Const.ALOAD_2: case Const.ALOAD_3: case Const.ALOAD: if (DEBUG) { System.out.println(" ALOAD at PC " + getPC()); } start = getPC(); stage = 1; break; case Const.GETSTATIC: if (DEBUG) { System.out.println(" getfield in stage " + stage); } lastFieldSeen = FieldAnnotation.fromReferencedField(this); start = getPC(); stage = 2; break; case Const.GETFIELD: if (DEBUG) { System.out.println(" getfield in stage " + stage); } lastFieldSeen = FieldAnnotation.fromReferencedField(this); if (stage == 1 || stage == 2) { stage = 2; } else { stage = 0; } break; case Const.GOTO: case Const.IFNE: case Const.IFEQ: case Const.IFNULL: case Const.IFNONNULL: if (DEBUG) { System.out.println(" conditional branch in stage " + stage + " to " + getBranchTarget()); } if (stage == 2 && getBranchTarget() == start) { bugReporter.reportBug(new BugInstance(this, "SP_SPIN_ON_FIELD", NORMAL_PRIORITY).addClassAndMethod(this) .addReferencedField(lastFieldSeen).addSourceLine(this, start)); stage = 0; } else if (getBranchTarget() < getPC()) { stage = 0; } break; default: stage = 0; break; } }
Example 7
Source File: Noise.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
@Override public void sawOpcode(int seen) { int priority; switch (seen) { case Const.INVOKEINTERFACE: case Const.INVOKEVIRTUAL: case Const.INVOKESPECIAL: case Const.INVOKESTATIC: hq.pushHash(getClassConstantOperand()); if (getNameConstantOperand().indexOf('$') == -1) { hq.pushHash(getNameConstantOperand()); } hq.pushHash(getSigConstantOperand()); priority = hq.getPriority(); if (priority <= Priorities.LOW_PRIORITY) { accumulator.accumulateBug(new BugInstance(this, "NOISE_METHOD_CALL", priority).addClassAndMethod(this) .addCalledMethod(this), this); } break; case Const.GETFIELD: case Const.PUTFIELD: case Const.GETSTATIC: case Const.PUTSTATIC: hq.pushHash(getClassConstantOperand()); if (getNameConstantOperand().indexOf('$') == -1) { hq.pushHash(getNameConstantOperand()); } hq.pushHash(getSigConstantOperand()); priority = hq.getPriority(); if (priority <= Priorities.LOW_PRIORITY) { accumulator.accumulateBug(new BugInstance(this, "NOISE_FIELD_REFERENCE", priority).addClassAndMethod(this) .addReferencedField(this), this); } break; case Const.CHECKCAST: case Const.INSTANCEOF: case Const.NEW: hq.pushHash(getClassConstantOperand()); break; case Const.IFEQ: case Const.IFNE: case Const.IFNONNULL: case Const.IFNULL: case Const.IF_ICMPEQ: case Const.IF_ICMPNE: case Const.IF_ICMPLE: case Const.IF_ICMPGE: case Const.IF_ICMPGT: case Const.IF_ICMPLT: case Const.IF_ACMPEQ: case Const.IF_ACMPNE: case Const.RETURN: case Const.ARETURN: case Const.IRETURN: case Const.MONITORENTER: case Const.MONITOREXIT: case Const.IINC: case Const.NEWARRAY: case Const.TABLESWITCH: case Const.LOOKUPSWITCH: case Const.LCMP: case Const.INEG: case Const.IADD: case Const.IMUL: case Const.ISUB: case Const.IDIV: case Const.IREM: case Const.IXOR: case Const.ISHL: case Const.ISHR: case Const.IUSHR: case Const.IAND: case Const.IOR: case Const.LAND: case Const.LOR: case Const.LADD: case Const.LMUL: case Const.LSUB: case Const.LDIV: case Const.LSHL: case Const.LSHR: case Const.LUSHR: case Const.AALOAD: case Const.AASTORE: case Const.IALOAD: case Const.IASTORE: case Const.BALOAD: case Const.BASTORE: hq.push(seen); priority = hq.getPriority(); if (priority <= Priorities.LOW_PRIORITY) { accumulator.accumulateBug( new BugInstance(this, "NOISE_OPERATION", priority).addClassAndMethod(this).addString(Const.getOpcodeName(seen)), this); } break; default: break; } }
Example 8
Source File: FindFloatEquality.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
@Override public void sawOpcode(int seen) { switch (seen) { case Const.FCMPG: case Const.FCMPL: case Const.DCMPG: case Const.DCMPL: if (stack.getStackDepth() >= 2) { OpcodeStack.Item first = stack.getStackItem(0); OpcodeStack.Item second = stack.getStackItem(1); if (first.getRegisterNumber() == second.getRegisterNumber() && first.getRegisterNumber() != -1) { break; } if (first.isInitialParameter() && second.isInitialParameter()) { break; } if (sameField(first, second)) { break; } Number n1 = (Number) first.getConstant(); Number n2 = (Number) second.getConstant(); if (n1 != null && Double.isNaN(n1.doubleValue()) || n2 != null && Double.isNaN(n2.doubleValue())) { BugInstance bug = new BugInstance(this, "FE_TEST_IF_EQUAL_TO_NOT_A_NUMBER", HIGH_PRIORITY) .addClassAndMethod(this); bugAccumulator.accumulateBug(bug, this); state = SAW_NOTHING; break; } if (first.getSpecialKind() == OpcodeStack.Item.NASTY_FLOAT_MATH && !isZero(n2) || second.getSpecialKind() == OpcodeStack.Item.NASTY_FLOAT_MATH && !isZero(n1) || first.getSpecialKind() == OpcodeStack.Item.FLOAT_MATH && !okValueToCompareAgainst(n2) || second.getSpecialKind() == OpcodeStack.Item.FLOAT_MATH && !okValueToCompareAgainst(n1)) { if (priority != HIGH_PRIORITY) { found.clear(); } priority = HIGH_PRIORITY; state = SAW_COMP; break; } if (priority == HIGH_PRIORITY) { break; } // if (first.isInitialParameter() && n2 != null) break; // if (second.isInitialParameter() && n1 != null) break; if (n1 != null && n2 != null) { break; } if (okValueToCompareAgainst(n1) || okValueToCompareAgainst(n2)) { break; } if (n1 != null && !second.isInitialParameter() || n2 != null && !first.isInitialParameter()) { if (priority == LOW_PRIORITY) { found.clear(); } priority = NORMAL_PRIORITY; } else if (priority == NORMAL_PRIORITY) { break; } state = SAW_COMP; } break; case Const.IFEQ: case Const.IFNE: if (state == SAW_COMP) { SourceLineAnnotation sourceLineAnnotation = SourceLineAnnotation.fromVisitedInstruction(getClassContext(), this, getPC()); if (sourceLineAnnotation != null) { found.add(sourceLineAnnotation); } } state = SAW_NOTHING; break; default: state = SAW_NOTHING; break; } }
Example 9
Source File: FindNonShortCircuit.java From spotbugs with GNU Lesser General Public License v2.1 | 4 votes |
private void scanForShortCircuit(int seen) { switch (seen) { case Const.IAND: case Const.IOR: // System.out.println("Saw IOR or IAND at distance " + distance); OpcodeStack.Item item0 = stack.getStackItem(0); OpcodeStack.Item item1 = stack.getStackItem(1); if (item0.getConstant() == null && item1.getConstant() == null && distance < 4) { // if (item0.getRegisterNumber() >= 0 && item1.getRegisterNumber() >= 0) { // if (false) { // clearAll(); // } // } operator = seen; stage2 = 1; } else { stage2 = 0; } break; case Const.IFEQ: case Const.IFNE: if (stage2 == 1) { // System.out.println("Found nsc"); reportBug(); } stage2 = 0; break; case Const.PUTFIELD: case Const.PUTSTATIC: case Const.IRETURN: if (operator == Const.IAND && stage2 == 1) { reportBug(); } stage2 = 0; break; default: stage2 = 0; break; } }
Example 10
Source File: InstructionFactory.java From commons-bcel with Apache License 2.0 | 4 votes |
/** Create branch instruction by given opcode, except LOOKUPSWITCH and TABLESWITCH. * For those you should use the SWITCH compound instruction. */ public static BranchInstruction createBranchInstruction( final short opcode, final InstructionHandle target ) { switch (opcode) { case Const.IFEQ: return new IFEQ(target); case Const.IFNE: return new IFNE(target); case Const.IFLT: return new IFLT(target); case Const.IFGE: return new IFGE(target); case Const.IFGT: return new IFGT(target); case Const.IFLE: return new IFLE(target); case Const.IF_ICMPEQ: return new IF_ICMPEQ(target); case Const.IF_ICMPNE: return new IF_ICMPNE(target); case Const.IF_ICMPLT: return new IF_ICMPLT(target); case Const.IF_ICMPGE: return new IF_ICMPGE(target); case Const.IF_ICMPGT: return new IF_ICMPGT(target); case Const.IF_ICMPLE: return new IF_ICMPLE(target); case Const.IF_ACMPEQ: return new IF_ACMPEQ(target); case Const.IF_ACMPNE: return new IF_ACMPNE(target); case Const.GOTO: return new GOTO(target); case Const.JSR: return new JSR(target); case Const.IFNULL: return new IFNULL(target); case Const.IFNONNULL: return new IFNONNULL(target); case Const.GOTO_W: return new GOTO_W(target); case Const.JSR_W: return new JSR_W(target); default: throw new IllegalArgumentException("Invalid opcode: " + opcode); } }