コード例 #1
0
  /**
   * Bytecode generation for a method
   *
   * @param classScope
   * @param classFile
   */
  public void generateCode(ClassScope classScope, ClassFile classFile) {

    int problemResetPC = 0;
    classFile.codeStream.wideMode = false; // reset wideMode to false
    if (this.ignoreFurtherInvestigation) {
      // method is known to have errors, dump a problem method
      if (this.binding == null) return; // handle methods with invalid signature or duplicates
      int problemsLength;
      CategorizedProblem[] problems =
          this.scope.referenceCompilationUnit().compilationResult.getProblems();
      CategorizedProblem[] problemsCopy = new CategorizedProblem[problemsLength = problems.length];
      System.arraycopy(problems, 0, problemsCopy, 0, problemsLength);
      classFile.addProblemMethod(this, this.binding, problemsCopy);
      return;
    }
    boolean restart = false;
    boolean abort = false;
    // regular code generation
    do {
      try {
        problemResetPC = classFile.contentsOffset;
        this.generateCode(classFile);
        restart = false;
      } catch (AbortMethod e) {
        // a fatal error was detected during code generation, need to restart code gen if possible
        if (e.compilationResult == CodeStream.RESTART_IN_WIDE_MODE) {
          // a branch target required a goto_w, restart code gen in wide mode.
          classFile.contentsOffset = problemResetPC;
          classFile.methodCount--;
          classFile.codeStream.resetInWideMode(); // request wide mode
          restart = true;
        } else if (e.compilationResult == CodeStream.RESTART_CODE_GEN_FOR_UNUSED_LOCALS_MODE) {
          classFile.contentsOffset = problemResetPC;
          classFile.methodCount--;
          classFile.codeStream.resetForCodeGenUnusedLocals();
          restart = true;
        } else {
          restart = false;
          abort = true;
        }
      }
    } while (restart);
    // produce a problem method accounting for this fatal error
    if (abort) {
      int problemsLength;
      CategorizedProblem[] problems =
          this.scope.referenceCompilationUnit().compilationResult.getAllProblems();
      CategorizedProblem[] problemsCopy = new CategorizedProblem[problemsLength = problems.length];
      System.arraycopy(problems, 0, problemsCopy, 0, problemsLength);
      classFile.addProblemMethod(this, this.binding, problemsCopy, problemResetPC);
    }
  }
コード例 #2
0
  public void generateCode(ClassFile classFile) {

    classFile.generateMethodInfoHeader(this.binding);
    int methodAttributeOffset = classFile.contentsOffset;
    int attributeNumber = classFile.generateMethodInfoAttributes(this.binding);
    if ((!this.binding.isNative()) && (!this.binding.isAbstract())) {
      int codeAttributeOffset = classFile.contentsOffset;
      classFile.generateCodeAttributeHeader();
      CodeStream codeStream = classFile.codeStream;
      codeStream.reset(this, classFile);
      // initialize local positions
      this.scope.computeLocalVariablePositions(this.binding.isStatic() ? 0 : 1, codeStream);

      // arguments initialization for local variable debug attributes
      if (this.arguments != null) {
        for (int i = 0, max = this.arguments.length; i < max; i++) {
          LocalVariableBinding argBinding;
          codeStream.addVisibleLocalVariable(argBinding = this.arguments[i].binding);
          argBinding.recordInitializationStartPC(0);
        }
      }
      if (this.statements != null) {
        for (int i = 0, max = this.statements.length; i < max; i++)
          this.statements[i].generateCode(this.scope, codeStream);
      }
      // if a problem got reported during code gen, then trigger problem method creation
      if (this.ignoreFurtherInvestigation) {
        throw new AbortMethod(this.scope.referenceCompilationUnit().compilationResult, null);
      }
      if ((this.bits & ASTNode.NeedFreeReturn) != 0) {
        codeStream.return_();
      }
      // local variable attributes
      codeStream.exitUserScope(this.scope);
      codeStream.recordPositionsFrom(0, this.declarationSourceEnd);
      try {
        classFile.completeCodeAttribute(codeAttributeOffset);
      } catch (NegativeArraySizeException e) {
        throw new AbortMethod(this.scope.referenceCompilationUnit().compilationResult, null);
      }
      attributeNumber++;
    } else {
      checkArgumentsSize();
    }
    classFile.completeMethodInfo(this.binding, methodAttributeOffset, attributeNumber);
  }