/**
* 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);
}
}
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);
}