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/**************************************************************************
**
** This file is part of Qt Creator
**
** Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
**
** Contact: Nokia Corporation (qt-info@nokia.com)
**
** Commercial Usage
**
** Licensees holding valid Qt Commercial licenses may use this file in
** accordance with the Qt Commercial License Agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Nokia.
**
** GNU Lesser General Public License Usage
**
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** If you are unsure which license is appropriate for your use, please
** contact the sales department at http://qt.nokia.com/contact.
**
**************************************************************************/
#include "cdbpromptthread.h"
#include <QtCore/QDebug>
static const char help[] =
"Special commands:\n\n"
"H Display Help\n"
"V Output version\n"
"E expression Evaluate C++expression\n"
"S binary args Start binary\n"
"I Interrupt\n"
"G Go\n"
"Q cmd Queue command for execution in AttachProcess\n"
"Q Clear command queue\n"
"B file:line Queue a breakpoint for adding in AttachProcess\n"
"B Clear breakpoint queue\n"
"L List breakpoints\n"
"F <n> Print stack frame <n>, 0 being top\n"
"P <cmd> Run Python command\n"
"W Synchronous wait for debug event\n"
"\nThe remaining commands are passed to CDB.\n";
CdbPromptThread::CdbPromptThread(FILE *file, QObject *parent) :
QThread(parent),
m_waitingForDebugEvent(false),
m_inputFile(file)
{
if (!m_inputFile)
m_inputFile = stdin;
}
void CdbPromptThread::run()
{
enum { bufSize =1024 };
QString cmd;
char buf[bufSize];
std::putc('>', stdout);
// When reading from an input file, switch to stdin after reading it out
while (true) {
if (std::fgets(buf, bufSize, m_inputFile) == NULL) {
if (m_inputFile == stdin) {
break;
} else {
fclose(m_inputFile);
m_inputFile = stdin;
continue;
}
}
cmd += QString::fromLatin1(buf);
if (cmd.endsWith(QLatin1Char('\n'))) {
cmd.truncate(cmd.size() - 1);
if (!cmd.isEmpty() && !handleCommand(cmd.trimmed()))
break;
cmd.clear();
}
std::putc('>', stdout);
}
if (m_inputFile != stdin)
fclose(m_inputFile);
}
// Determine the command
static Command evaluateCommand(const QString &cmdToken)
{
if (cmdToken.size() == 1) {
switch(cmdToken.at(0).toAscii()) {
case 'I':
return Async_Interrupt;
case 'Q':
return Sync_Queue;
case 'B':
return Sync_QueueBreakPoint;
case 'L':
return Sync_ListBreakPoints;
case 'E':
return Sync_EvalExpression;
case 'G':
return Execution_Go;
case 'S':
return Execution_StartBinary;
case 'F':
return Sync_PrintFrame;
case 'P':
return Sync_Python;
case 'V':
return Sync_OutputVersion;
case 'W':
return WaitCommand;
default:
break;
}
return UnknownCommand;
}
return UnknownCommand;
}
// Chop off command and return argument list
static Command parseCommand(QString *s)
{
if (s->isEmpty())
return UnknownCommand;
int firstBlank = s->indexOf(QLatin1Char(' '));
// No further arguments
if (firstBlank == -1) {
const Command rc1 = evaluateCommand(*s);
if (rc1 != UnknownCommand) // pass through debugger cmds
s->clear();
return rc1;
}
// Chop
const Command rc = evaluateCommand(s->left(firstBlank));
if (rc != UnknownCommand) { // pass through debugger cmds)
int nextToken = firstBlank + 1;
for ( ; nextToken < s->size() && s->at(nextToken).isSpace(); nextToken++) ;
s->remove(0, nextToken);
}
return rc;
}
void CdbPromptThread::notifyDebugEvent()
{
if (m_waitingForDebugEvent)
m_debugEventWaitCondition.wakeAll();
}
bool CdbPromptThread::handleCommand(QString cmd)
{
if (cmd == QLatin1String("q"))
return false;
if (cmd == QLatin1String("H")) {
std::fputs(help, stdout);
return true;
}
const Command c = parseCommand(&cmd);
if (c == WaitCommand) {
std::fputs("Waiting for debug event\n", stdout);
m_debugEventMutex.lock();
m_waitingForDebugEvent = true;
m_debugEventWaitCondition.wait(&m_debugEventMutex);
m_debugEventMutex.unlock();
std::fputs("Debug event received\n", stdout);
m_waitingForDebugEvent = false;
return true;
}
if (c & AsyncCommand) {
emit asyncCommand(c, cmd);
return true;
}
if (c & ExecutionCommand) {
emit executionCommand(c, cmd);
return true;
}
// Let Unknown default to sync exeute
emit syncCommand(c, cmd);
return true;
}
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