use of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder in project groovy by apache.
the class StatementWriter method writeSynchronized.
public void writeSynchronized(SynchronizedStatement statement) {
controller.getAcg().onLineNumber(statement, "visitSynchronizedStatement");
writeStatementLabel(statement);
final MethodVisitor mv = controller.getMethodVisitor();
CompileStack compileStack = controller.getCompileStack();
statement.getExpression().visit(controller.getAcg());
controller.getOperandStack().box();
final int index = compileStack.defineTemporaryVariable("synchronized", ClassHelper.OBJECT_TYPE, true);
final Label synchronizedStart = new Label();
final Label synchronizedEnd = new Label();
final Label catchAll = new Label();
mv.visitVarInsn(ALOAD, index);
mv.visitInsn(MONITORENTER);
mv.visitLabel(synchronizedStart);
// place holder for "empty" synchronized blocks, for example
// if there is only a break/continue.
mv.visitInsn(NOP);
Runnable finallyPart = new Runnable() {
public void run() {
mv.visitVarInsn(ALOAD, index);
mv.visitInsn(MONITOREXIT);
}
};
BlockRecorder fb = new BlockRecorder(finallyPart);
fb.startRange(synchronizedStart);
compileStack.pushBlockRecorder(fb);
statement.getCode().visit(controller.getAcg());
fb.closeRange(catchAll);
compileStack.writeExceptionTable(fb, catchAll, null);
//pop fb
compileStack.pop();
finallyPart.run();
mv.visitJumpInsn(GOTO, synchronizedEnd);
mv.visitLabel(catchAll);
finallyPart.run();
mv.visitInsn(ATHROW);
mv.visitLabel(synchronizedEnd);
compileStack.removeVar(index);
}
use of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder in project groovy-core by groovy.
the class StatementWriter method writeTryCatchFinally.
public void writeTryCatchFinally(TryCatchStatement statement) {
controller.getAcg().onLineNumber(statement, "visitTryCatchFinally");
writeStatementLabel(statement);
MethodVisitor mv = controller.getMethodVisitor();
CompileStack compileStack = controller.getCompileStack();
OperandStack operandStack = controller.getOperandStack();
Statement tryStatement = statement.getTryStatement();
final Statement finallyStatement = statement.getFinallyStatement();
// start try block, label needed for exception table
Label tryStart = new Label();
mv.visitLabel(tryStart);
BlockRecorder tryBlock = makeBlockRecorder(finallyStatement);
tryBlock.startRange(tryStart);
tryStatement.visit(controller.getAcg());
// goto finally part
Label finallyStart = new Label();
mv.visitJumpInsn(GOTO, finallyStart);
Label tryEnd = new Label();
mv.visitLabel(tryEnd);
tryBlock.closeRange(tryEnd);
// pop for "makeBlockRecorder(finallyStatement)"
controller.getCompileStack().pop();
BlockRecorder catches = makeBlockRecorder(finallyStatement);
for (CatchStatement catchStatement : statement.getCatchStatements()) {
ClassNode exceptionType = catchStatement.getExceptionType();
String exceptionTypeInternalName = BytecodeHelper.getClassInternalName(exceptionType);
// start catch block, label needed for exception table
Label catchStart = new Label();
mv.visitLabel(catchStart);
catches.startRange(catchStart);
// create exception variable and store the exception
Parameter exceptionVariable = catchStatement.getVariable();
compileStack.pushState();
compileStack.defineVariable(exceptionVariable, true);
// handle catch body
catchStatement.visit(controller.getAcg());
// place holder to avoid problems with empty catch blocks
mv.visitInsn(NOP);
// pop for the variable
controller.getCompileStack().pop();
// end of catch
Label catchEnd = new Label();
mv.visitLabel(catchEnd);
catches.closeRange(catchEnd);
// goto finally start
mv.visitJumpInsn(GOTO, finallyStart);
compileStack.writeExceptionTable(tryBlock, catchStart, exceptionTypeInternalName);
}
// Label used to handle exceptions in catches and regularly
// visited finals.
Label catchAny = new Label();
// add "catch any" block to exception table for try part we do this
// after the exception blocks, because else this one would supersede
// any of those otherwise
compileStack.writeExceptionTable(tryBlock, catchAny, null);
// same for the catch parts
compileStack.writeExceptionTable(catches, catchAny, null);
// pop for "makeBlockRecorder(catches)"
compileStack.pop();
// start finally
mv.visitLabel(finallyStart);
finallyStatement.visit(controller.getAcg());
// **
mv.visitInsn(NOP);
// goto after all-catching block
Label skipCatchAll = new Label();
mv.visitJumpInsn(GOTO, skipCatchAll);
// start a block catching any Exception
mv.visitLabel(catchAny);
// store exception
// TODO: maybe define a Throwable and use it here instead of Object
operandStack.push(ClassHelper.OBJECT_TYPE);
int anyExceptionIndex = compileStack.defineTemporaryVariable("exception", true);
finallyStatement.visit(controller.getAcg());
// load the exception and rethrow it
mv.visitVarInsn(ALOAD, anyExceptionIndex);
mv.visitInsn(ATHROW);
mv.visitLabel(skipCatchAll);
}
use of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder in project groovy-core by groovy.
the class StatementWriter method makeBlockRecorder.
private BlockRecorder makeBlockRecorder(final Statement finallyStatement) {
final BlockRecorder block = new BlockRecorder();
Runnable tryRunner = new Runnable() {
public void run() {
controller.getCompileStack().pushBlockRecorderVisit(block);
finallyStatement.visit(controller.getAcg());
controller.getCompileStack().popBlockRecorderVisit(block);
}
};
block.excludedStatement = tryRunner;
controller.getCompileStack().pushBlockRecorder(block);
return block;
}
use of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder in project groovy-core by groovy.
the class StatementWriter method writeSynchronized.
public void writeSynchronized(SynchronizedStatement statement) {
controller.getAcg().onLineNumber(statement, "visitSynchronizedStatement");
writeStatementLabel(statement);
final MethodVisitor mv = controller.getMethodVisitor();
CompileStack compileStack = controller.getCompileStack();
statement.getExpression().visit(controller.getAcg());
controller.getOperandStack().box();
final int index = compileStack.defineTemporaryVariable("synchronized", ClassHelper.OBJECT_TYPE, true);
final Label synchronizedStart = new Label();
final Label synchronizedEnd = new Label();
final Label catchAll = new Label();
mv.visitVarInsn(ALOAD, index);
mv.visitInsn(MONITORENTER);
mv.visitLabel(synchronizedStart);
// place holder for "empty" synchronized blocks, for example
// if there is only a break/continue.
mv.visitInsn(NOP);
Runnable finallyPart = new Runnable() {
public void run() {
mv.visitVarInsn(ALOAD, index);
mv.visitInsn(MONITOREXIT);
}
};
BlockRecorder fb = new BlockRecorder(finallyPart);
fb.startRange(synchronizedStart);
compileStack.pushBlockRecorder(fb);
statement.getCode().visit(controller.getAcg());
fb.closeRange(catchAll);
compileStack.writeExceptionTable(fb, catchAll, null);
// pop fb
compileStack.pop();
finallyPart.run();
mv.visitJumpInsn(GOTO, synchronizedEnd);
mv.visitLabel(catchAll);
finallyPart.run();
mv.visitInsn(ATHROW);
mv.visitLabel(synchronizedEnd);
}
use of org.codehaus.groovy.classgen.asm.CompileStack.BlockRecorder in project groovy by apache.
the class StatementWriter method makeBlockRecorder.
private BlockRecorder makeBlockRecorder(final Statement finallyStatement) {
final BlockRecorder block = new BlockRecorder();
Runnable tryRunner = new Runnable() {
public void run() {
controller.getCompileStack().pushBlockRecorderVisit(block);
finallyStatement.visit(controller.getAcg());
controller.getCompileStack().popBlockRecorderVisit(block);
}
};
block.excludedStatement = tryRunner;
controller.getCompileStack().pushBlockRecorder(block);
return block;
}
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