javassist.bytecode.Bytecode.currentPc()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中javassist.bytecode.Bytecode.currentPc()方法的一些代码示例，展示了Bytecode.currentPc()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Bytecode.currentPc()方法的具体详情如下：
包路径：javassist.bytecode.Bytecode
类名称：Bytecode
方法名：currentPc

Bytecode.currentPc介绍

[英]Returns the length of bytecode sequence that have been added so far.
[中]返回到目前为止已添加的字节码序列的长度。

代码示例

代码示例来源：origin: redisson/redisson

private void jsrJmp(Bytecode b) {
  b.addOpcode(Opcode.GOTO);
  jsrList.add(new int[] {b.currentPc(), var});
  b.addIndex(0);
}

代码示例来源：origin: redisson/redisson

private void atBreakStmnt(Stmnt st, boolean notCont)
  throws CompileError
{
  if (st.head() != null)
    throw new CompileError(
          "sorry, not support labeled break or continue");
  bytecode.addOpcode(Opcode.GOTO);
  Integer pc = new Integer(bytecode.currentPc());
  bytecode.addIndex(0);
  if (notCont)
    breakList.add(pc);
  else
    continueList.add(pc);
}

代码示例来源：origin: org.javassist/javassist

private void jsrJmp(Bytecode b) {
  b.addOpcode(Opcode.GOTO);
  jsrList.add(new int[] {b.currentPc(), var});
  b.addIndex(0);
}

代码示例来源：origin: redisson/redisson

protected void atClassObject2(String cname) throws CompileError {
  int start = bytecode.currentPc();
  bytecode.addLdc(cname);
  bytecode.addInvokestatic("java.lang.Class", "forName",
               "(Ljava/lang/String;)Ljava/lang/Class;");
  int end = bytecode.currentPc();
  bytecode.addOpcode(Opcode.GOTO);
  int pc = bytecode.currentPc();
  bytecode.addIndex(0);   // correct later
  bytecode.addExceptionHandler(start, end, bytecode.currentPc(),
                 "java.lang.ClassNotFoundException");
               + "Ljava/lang/NoClassDefFoundError;");
  bytecode.addOpcode(ATHROW);
  bytecode.write16bit(pc, bytecode.currentPc() - pc + 1);

代码示例来源：origin: redisson/redisson

/**
 * Adds a finally clause for earch return statement.
 */
private void addFinally(ArrayList returnList, Stmnt finallyBlock)
  throws CompileError
{
  Bytecode bc = bytecode;
  int n = returnList.size();
  for (int i = 0; i < n; ++i) {
    final int[] ret = (int[])returnList.get(i);
    int pc = ret[0];
    bc.write16bit(pc, bc.currentPc() - pc + 1);
    ReturnHook hook = new JsrHook2(this, ret);
    finallyBlock.accept(this);
    hook.remove(this);
    if (!hasReturned) {
      bc.addOpcode(Opcode.GOTO);
      bc.addIndex(pc + 3 - bc.currentPc());
    }
  }
}

代码示例来源：origin: redisson/redisson

if (notDo) {
  bytecode.addOpcode(Opcode.GOTO);
  pc = bytecode.currentPc();
  bytecode.addIndex(0);
int pc2 = bytecode.currentPc();
if (body != null)
  body.accept(this);
int pc3 = bytecode.currentPc();
if (notDo)
  bytecode.write16bit(pc, pc3 - pc + 1);
bytecode.addIndex(pc2 - bytecode.currentPc() + 1);
patchGoto(breakList, bytecode.currentPc());
patchGoto(continueList, pc3);
continueList = prevContList;

代码示例来源：origin: org.javassist/javassist

private void atBreakStmnt(Stmnt st, boolean notCont)
  throws CompileError
{
  if (st.head() != null)
    throw new CompileError(
          "sorry, not support labeled break or continue");
  bytecode.addOpcode(Opcode.GOTO);
  Integer pc = Integer.valueOf(bytecode.currentPc());
  bytecode.addIndex(0);
  if (notCont)
    breakList.add(pc);
  else
    continueList.add(pc);
}

代码示例来源：origin: redisson/redisson

public void atCondExpr(CondExpr expr) throws CompileError {
  if (booleanExpr(false, expr.condExpr()))
    expr.elseExpr().accept(this);
  else {
    int pc = bytecode.currentPc();
    bytecode.addIndex(0);   // correct later
    expr.thenExpr().accept(this);
    int dim1 = arrayDim;
    bytecode.addOpcode(Opcode.GOTO);
    int pc2 = bytecode.currentPc();
    bytecode.addIndex(0);
    bytecode.write16bit(pc, bytecode.currentPc() - pc + 1);
    expr.elseExpr().accept(this);
    if (dim1 != arrayDim)
      throw new CompileError("type mismatch in ?:");
    bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1);
  }
}

代码示例来源：origin: redisson/redisson

init.accept(this);
int pc = bytecode.currentPc();
int pc2 = 0;
if (expr != null) {
  pc2 = bytecode.currentPc();
  bytecode.addIndex(0);
  body.accept(this);
int pc3 = bytecode.currentPc();
if (update != null)
  update.accept(this);
bytecode.addIndex(pc - bytecode.currentPc() + 1);
int pc4 = bytecode.currentPc();
if (expr != null)
  bytecode.write16bit(pc2, pc4 - pc2 + 1);

代码示例来源：origin: org.javassist/javassist

/**
 * Adds a finally clause for earch return statement.
 */
private void addFinally(List<int[]> returnList, Stmnt finallyBlock)
  throws CompileError
{
  Bytecode bc = bytecode;
  for (final int[] ret:returnList) {
    int pc = ret[0];
    bc.write16bit(pc, bc.currentPc() - pc + 1);
    ReturnHook hook = new JsrHook2(this, ret);
    finallyBlock.accept(this);
    hook.remove(this);
    if (!hasReturned) {
      bc.addOpcode(Opcode.GOTO);
      bc.addIndex(pc + 3 - bc.currentPc());
    }
  }
}

代码示例来源：origin: redisson/redisson

int pc = bytecode.currentPc();
int pc2 = 0;
bytecode.addIndex(0);   // correct later
  pc2 = bytecode.currentPc();
  bytecode.addIndex(0);
bytecode.write16bit(pc, bytecode.currentPc() - pc + 1);
if (elsep != null) {
  elsep.accept(this);
  if (!thenHasReturned)
    bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1);

代码示例来源：origin: org.javassist/javassist

@Override
public void atCondExpr(CondExpr expr) throws CompileError {
  if (booleanExpr(false, expr.condExpr()))
    expr.elseExpr().accept(this);
  else {
    int pc = bytecode.currentPc();
    bytecode.addIndex(0);   // correct later
    expr.thenExpr().accept(this);
    int dim1 = arrayDim;
    bytecode.addOpcode(Opcode.GOTO);
    int pc2 = bytecode.currentPc();
    bytecode.addIndex(0);
    bytecode.write16bit(pc, bytecode.currentPc() - pc + 1);
    expr.elseExpr().accept(this);
    if (dim1 != arrayDim)
      throw new CompileError("type mismatch in ?:");
    bytecode.write16bit(pc2, bytecode.currentPc() - pc2 + 1);
  }
}

代码示例来源：origin: redisson/redisson

int opcodePc = bytecode.currentPc();
bytecode.addOpcode(LOOKUPSWITCH);
int npads = 3 - (opcodePc & 3);
int opcodePc2 = bytecode.currentPc();
bytecode.addGap(4);
bytecode.add32bit(npairs);
  int op = label.getOperator();
  if (op == DEFAULT)
    defaultPc = bytecode.currentPc();
  else if (op != CASE)
    fatal();
    pairs[ipairs++]
      = ((long)computeLabel(label.head()) << 32) + 
       ((long)(bytecode.currentPc() - opcodePc) & 0xffffffff);
  hasReturned = false;
int endPc = bytecode.currentPc();
if (defaultPc < 0)
  defaultPc = endPc;

代码示例来源：origin: redisson/redisson

protected boolean doit(Bytecode b, int opcode) {
    switch (opcode) {
    case Opcode.RETURN :
      break;
    case ARETURN :
      b.addAstore(var);
      break;
    case IRETURN :
      b.addIstore(var);
      break;
    case LRETURN :
      b.addLstore(var);
      break;
    case DRETURN :
      b.addDstore(var);
      break;
    case FRETURN :
      b.addFstore(var);
      break;
    default :
      throw new RuntimeException("fatal");
    }
    b.addOpcode(Opcode.GOTO);
    b.addIndex(target - b.currentPc() + 3);
    return true;
  }
}

代码示例来源：origin: redisson/redisson

int pc = bc.currentPc();
Stmnt body = (Stmnt)st.tail();
if (body != null)
  body.accept(this);
int pc2 = bc.currentPc();
int pc3 = 0;
if (!hasReturned) {
  rh.doit(bc, 0);     // the 2nd arg is ignored.
  bc.addOpcode(Opcode.GOTO);
  pc3 = bc.currentPc();
  bc.addIndex(0);
  int pc4 = bc.currentPc();
  rh.doit(bc, 0);         // the 2nd arg is ignored.
  bc.addOpcode(ATHROW);
  bc.write16bit(pc3, bc.currentPc() - pc3 + 1);

代码示例来源：origin: redisson/redisson

private int insertAfterAdvice(Bytecode code, Javac jv, String src,
               ConstPool cp, CtClass rtype, int varNo)
  throws CompileError
{
  int pc = code.currentPc();
  if (rtype == CtClass.voidType) {
    code.addOpcode(Opcode.ACONST_NULL);
    code.addAstore(varNo);
    jv.compileStmnt(src);
    code.addOpcode(Opcode.RETURN);
    if (code.getMaxLocals() < 1)
      code.setMaxLocals(1);
  }
  else {
    code.addStore(varNo, rtype);
    jv.compileStmnt(src);
    code.addLoad(varNo, rtype);
    if (rtype.isPrimitive())
      code.addOpcode(((CtPrimitiveType)rtype).getReturnOp());
    else
      code.addOpcode(Opcode.ARETURN);
  }
  return code.currentPc() - pc;
}

代码示例来源：origin: redisson/redisson

int pc = bytecode.currentPc();
bytecode.addIndex(0);       // correct later
if (booleanExpr(isAndAnd, bexpr.oprand2()))
  bytecode.addOpcode(Opcode.GOTO);
bytecode.write16bit(pc, bytecode.currentPc() - pc + 3);
if (branchIf != isAndAnd) {
  bytecode.addIndex(6);   // skip GOTO instruction

代码示例来源：origin: redisson/redisson

int pc = b.currentPc();
b.addAload(var);
b.addOpcode(Opcode.ATHROW);
return b.currentPc() - pc;

代码示例来源：origin: redisson/redisson

code.addGetstatic(NULL_INTERCEPTOR_HOLDER, DEFAULT_INTERCEPTOR, HANDLER_TYPE);
code.addPutfield(thisClassName, HANDLER, HANDLER_TYPE);
int pc = code.currentPc();

代码示例来源：origin: redisson/redisson

b.addOpcode(Opcode.GOTO);
b.addIndex(oldHandler - iterator.getCodeLength()
      - b.currentPc() + 1);

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