/**
* This function should be called only if user has specified -debug option. In this function, if
* the user has issued one of the step instructions or has enabled suspend flag in previous
* instruction (through breakpoint), then it will wait until user issues a new debugger command.
*
* @param currInst current instruction
* @throws DMLRuntimeException if DMLRuntimeException occurs
*/
@SuppressWarnings("deprecation")
private void suspendIfAskedInDebugMode(Instruction currInst) throws DMLRuntimeException {
if (!DMLScript.ENABLE_DEBUG_MODE) {
System.err.println(
"ERROR: The function suspendIfAskedInDebugMode should not be called in non-debug mode.");
}
// check for stepping options
if (!_dbState.suspend && _dbState.dbCommand != null) {
if (_dbState.dbCommand.equalsIgnoreCase("step_instruction")) {
System.out.format("Step instruction reached at %s.\n", _dbState.getPC().toString());
_dbState.suspend = true;
} else if (_dbState.dbCommand.equalsIgnoreCase("step_line")
&& _dbState.prevPC.getLineNumber() != currInst.getLineNum()
&& _dbState.prevPC.getLineNumber() != 0) {
// Don't step into first instruction of first line
// System.out.format("Step reached at %s.\n", this._prog.getPC().toString());
System.out.format("Step reached at %s.\n", _dbState.getPC().toStringWithoutInstructionID());
_dbState.suspend = true;
} else if (_dbState.dbCommand.equalsIgnoreCase("step return")
&& currInst instanceof FunctionCallCPInstruction) {
FunctionCallCPInstruction funCallInst = (FunctionCallCPInstruction) currInst;
if (_dbState.dbCommandArg == null
|| funCallInst.getFunctionName().equalsIgnoreCase(_dbState.dbCommandArg)) {
System.out.format(
"Step return reached at %s.\n", _dbState.getPC().toStringWithoutInstructionID());
_dbState.suspend = true;
}
}
}
// check if runtime suspend signal is set
if (_dbState.suspend) {
// flush old commands and arguments
_dbState.dbCommand = null;
_dbState.dbCommandArg = null;
// print current DML script source line
if (currInst.getLineNum() != 0) _dbState.printDMLSourceLine(currInst.getLineNum());
// save current symbol table
_dbState.setVariables(this.getVariables());
// send next command signal to debugger control module
_dbState.nextCommand = true;
// suspend runtime execution thread
Thread.currentThread().suspend();
// reset next command signal
_dbState.nextCommand = false;
}
// reset runtime suspend signal
_dbState.suspend = false;
// update previous pc
_dbState.prevPC.setFunctionName(_dbState.getPC().getFunctionName());
_dbState.prevPC.setProgramBlockNumber(_dbState.getPC().getProgramBlockNumber());
_dbState.prevPC.setLineNumber(currInst.getLineNum());
}
public void updateDebugState(Instruction currInst) throws DMLRuntimeException {
if (DMLScript.ENABLE_DEBUG_MODE) {
// New change so that shell doesnot seem like it is hanging while running MR job
// Since UI cannot accept instructions when user is submitting the program
_dbState.nextCommand = false;
// Change to stop before first instruction of a given line
// update current instruction ID and line number
_dbState.getPC().setInstID(currInst.getInstID());
_dbState.getPC().setLineNumber(currInst.getLineNum());
// Change to stop before first instruction of a given line
suspendIfAskedInDebugMode(currInst);
}
}