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Engine2.cpp
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/*
* Copyright 2019, 2020 Rochus Keller <mailto:[email protected]>
*
* This file is part of the JuaJIT BC Viewer application.
*
* The following is the license that applies to this copy of the
* application. For a license to use the application under conditions
* other than those described here, please email to [email protected].
*
* GNU General Public License Usage
* This file may be used under the terms of the GNU General Public
* License (GPL) versions 2.0 or 3.0 as published by the Free Software
* Foundation and appearing in the file LICENSE.GPL included in
* the packaging of this file. Please review the following information
* to ensure GNU General Public Licensing requirements will be met:
* http://www.fsf.org/licensing/licenses/info/GPLv2.html and
* http://www.gnu.org/copyleft/gpl.html.
*/
#include <lua.hpp>
#include "LuaJitComposer.h"
#include "Engine2.h"
#include <QCoreApplication>
#include <math.h>
#include <QtDebug>
#include <iostream>
#include <QTime>
#include <QFileInfo>
#include <QDir>
using namespace Lua;
static Engine2* s_this = 0;
static const char* s_path = "path";
static const char* s_cpath = "cpath";
static Engine2::Breaks s_dummy;
static const int s_aliveCount = 10000;
static QMap<QByteArray,QByteArray> preloads; // name -> buffer
int Engine2::_print (lua_State *L)
{
Engine2* e = Engine2::getInst();
Q_ASSERT( e != 0 );
QByteArray val1;
int n = lua_gettop(L); /* number of arguments */
int i;
lua_getglobal(L, "tostring");
for (i=1; i<=n; i++)
{
const char *s;
lua_pushvalue(L, -1); /* function to be called */
lua_pushvalue(L, i); /* value to print */
lua_call(L, 1, 1);
s = lua_tostring(L, -1); /* get result */
if (s == NULL)
return luaL_error(L, "`tostring' must return a string to `print'");
if (i>1)
val1 += "\t";
val1 += s;
lua_pop(L, 1); /* pop result */
}
if( !val1.endsWith('\n') )
val1 += '\n';
try
{
e->notify( Print, val1 );
}catch( std::exception& e )
{
luaL_error( L, "Error calling host: %s", e.what() );
}catch( ... )
{
luaL_error( L, "Unknown exception while calling host" );
}
return 0;
}
extern "C" {
static int dbgout(lua_State* L)
{
const int top = lua_gettop(L);
QByteArray buf;
QTextStream ts(&buf,QIODevice::WriteOnly);
for( int i = 1; i <= top; i++ )
{
if( i != 1 )
ts << "\t";
switch( lua_type(L,i) )
{
case LUA_TNIL:
ts << "nil";
break;
case LUA_TSTRING:
{
const char* str = lua_tostring(L,i);
ts << str;
}
break;
case LUA_TBOOLEAN:
ts << ( lua_toboolean(L,i) ? true : false );
break;
case LUA_TNUMBER:
{
const lua_Number n = lua_tonumber(L,i);
const int nn = n;
if( n == lua_Number(nn) )
ts << nn;
else
ts << n;
}
break;
case LUA_TLIGHTUSERDATA:
ts << "LUA_TLIGHTUSERDATA";
break;
case LUA_TTABLE:
ts << "LUA_TTABLE";
break;
case LUA_TFUNCTION:
ts << "LUA_TFUNCTION";
break;
case LUA_TUSERDATA:
ts << "LUA_TUSERDATA";
break;
case LUA_TTHREAD:
ts << "LUA_TTHREAD";
break;
default:
ts << "<unknown>";
break;
}
}
ts.flush();
qDebug() << buf.constData();
return 0;
}
static int doPreload(lua_State* L)
{
const char* name = lua_tostring(L,-1);
if( preloads.contains(name) )
{
QByteArray source = preloads.value(name);
const int status = luaL_loadbuffer( L, source, source.size(), name );
if( status != 0 )
lua_error(L);
lua_call(L,0,1);
}else
lua_pushnil(L);
return 1;
}
static int _flush(lua_State* L)
{
return 0; // NOP
}
}
int Engine2::_writeStdout(lua_State* L)
{
return _writeImp(L,false);
}
int Engine2::_writeStderr(lua_State* L)
{
return _writeImp(L,true);
}
int Engine2::_writeImp(lua_State *L, bool err) {
QByteArray buf;
QTextStream out(&buf);
int arg = 2;
int nargs = lua_gettop(L) - 1;
for (; nargs--; arg++) {
if (lua_type(L, arg) == LUA_TNUMBER) {
/* optimization: could be done exactly as for strings */
out << lua_tonumber(L, arg);
}
else {
size_t l;
const char *s = luaL_checklstring(L, arg, &l);
out << s;
}
}
out.flush();
Engine2* e = Engine2::getInst();
Q_ASSERT( e != 0 );
try
{
e->notify( err ? Engine2::Cerr : Engine2::Cout, buf );
}catch( std::exception& e )
{
luaL_error( L, "Error calling host: %s", e.what() );
}catch( ... )
{
luaL_error( L, "Unknown exception while calling host" );
}
return 0;
}
int Engine2::_prettyTraceLoc(lua_State* L)
{
const QByteArray loc = lua_tostring( L, 1 );
const QByteArray source = lua_tostring( L, 2 );
//const int linedefined = lua_tointeger( L, 3 );
const int colon = loc.lastIndexOf(':');
if( colon == -1 )
lua_pushvalue(L,1);
else
{
const int line = loc.mid(colon+1).toInt();
QByteArray res = loc.left(colon+1);
if( res.startsWith("0x") && !source.isEmpty() )
res = QFileInfo(source).fileName().toUtf8() + ":"; // rhs is already linedefined
if( JitComposer::isRowCol() )
res += QByteArray::number( JitComposer::unpackRow(line) ) + ":"
+ QByteArray::number( JitComposer::unpackCol(line) );
else
res += QByteArray::number(line);
lua_pushstring( L, res.constData() );
}
return 1;
}
Engine2::Engine2(QObject *p):QObject(p),
d_ctx( 0 ), d_debugging( false ), d_running(false), d_waitForCommand(false),
d_dbgCmd(RunToBreakPoint), d_defaultDbgCmd(RunToBreakPoint), d_activeLevel(0), d_dbgShell(0),
d_printToStdout(false), d_aliveSignal(false), d_mode(LineMode), d_aliveCount(0), d_stepCallDepth(0),
d_stepOverSync(false)
{
if( !restart() )
throw Exception( "failed to create engine" );
}
Engine2::~Engine2()
{
if( d_ctx )
lua_close( d_ctx );
}
void Engine2::addStdLibs()
{
addLibrary( TABLE );
addLibrary( STRING );
addLibrary( MATH );
}
bool Engine2::restart()
{
// necessary because there seems to be no other way to get rid of ffi.cdef declarations
if( isExecuting() )
return false;
if( d_ctx )
{
lua_close( d_ctx );
d_ctx = 0;
}
lua_State* ctx = lua_open();
if( ctx == 0 )
{
qCritical() << "Not enough memory to create Lua context";
return false;
}
LUAJIT_VERSION_SYM();
d_ctx = ctx;
addLibrary( BASE ); // Das muss hier stehen, sonst wird ev. print wieder überschrieben
#ifndef LUA_ENGINE_USE_DEFAULT_PRINT
lua_pushcfunction( ctx, _print );
lua_setglobal( ctx, "print" );
#endif
lua_pushcfunction( ctx, dbgout );
lua_setglobal( ctx, "dbgout" );
lua_pushcfunction( ctx, _prettyTraceLoc );
lua_setglobal( ctx, "_prettyTraceLoc" );
if( d_debugging )
{
d_debugging = false;
setDebug(true);
}
if( d_aliveSignal )
{
d_aliveSignal = false;
setAliveSignal(true);
}
return true;
}
void Engine2::addLibrary(Lib what)
{
if( d_running )
return;
switch( what )
{
case BIT:
lua_pushcfunction( d_ctx, luaopen_bit );
lua_pushstring(d_ctx, LUA_BITLIBNAME );
lua_call(d_ctx, 1, 0);
break;
case JIT:
lua_pushcfunction( d_ctx, luaopen_jit );
lua_pushstring(d_ctx, LUA_JITLIBNAME );
lua_call(d_ctx, 1, 0);
break;
case FFI:
lua_pushcfunction( d_ctx, luaopen_ffi );
lua_pushstring(d_ctx, LUA_FFILIBNAME );
lua_call(d_ctx, 1, 0);
break;
#if LUA_VERSION_NUM >= 501
case PACKAGE:
lua_pushcfunction( d_ctx, luaopen_package );
lua_pushstring(d_ctx, LUA_LOADLIBNAME );
lua_call(d_ctx, 1, 0);
// am 28.12.11 Konzept geändert. Neu werden wieder Lua-Standard-Loader verwendet.
break;
#endif
case BASE:
lua_pushcfunction( d_ctx, luaopen_base );
lua_pushstring(d_ctx, "" );
lua_call(d_ctx, 1, 0);
break;
case REMOVE_LOADS:
lua_pushnil( d_ctx );
lua_setglobal( d_ctx, "dofile" );
lua_pushnil( d_ctx );
lua_setglobal( d_ctx, "loadfile" );
lua_pushnil( d_ctx );
lua_setglobal( d_ctx, "load" );
lua_pushnil( d_ctx );
lua_setglobal( d_ctx, "loadstring" );
break;
case TABLE:
lua_pushcfunction( d_ctx, luaopen_table );
lua_pushstring(d_ctx, LUA_TABLIBNAME );
lua_call(d_ctx, 1, 0);
break;
case STRING:
lua_pushcfunction( d_ctx, luaopen_string );
lua_pushstring(d_ctx, LUA_STRLIBNAME );
lua_call(d_ctx, 1, 0);
break;
case MATH:
lua_pushcfunction( d_ctx, luaopen_math );
lua_pushstring(d_ctx, LUA_MATHLIBNAME );
lua_call(d_ctx, 1, 0);
break;
case IO:
lua_pushcfunction( d_ctx, luaopen_io );
lua_pushstring(d_ctx, LUA_IOLIBNAME );
lua_call(d_ctx, 1, 0);
#ifndef LUA_ENGINE_USE_DEFAULT_PRINT
// redirect stdout
lua_createtable(d_ctx,0,1); // file
lua_pushcfunction( d_ctx, _writeStdout );
lua_setfield(d_ctx, -2, "write" );
lua_pushcfunction( d_ctx, _flush );
lua_setfield(d_ctx, -2, "flush" );
lua_getglobal(d_ctx, LUA_IOLIBNAME );
lua_pushvalue(d_ctx,-2);
lua_setfield(d_ctx, -2, "stdout" );
lua_pop(d_ctx,2); // file + io
// redirect stderr
lua_createtable(d_ctx,0,1); // file
lua_pushcfunction( d_ctx, _writeStderr );
lua_setfield(d_ctx, -2, "write" );
lua_pushcfunction( d_ctx, _flush );
lua_setfield(d_ctx, -2, "flush" );
lua_getglobal(d_ctx, LUA_IOLIBNAME );
lua_pushvalue(d_ctx,-2);
lua_setfield(d_ctx, -2, "stderr" );
lua_pop(d_ctx,2); // file + io
#endif
break;
#if LUA_VERSION_NUM >= 501
case OS:
lua_pushcfunction( d_ctx, luaopen_os );
lua_pushstring(d_ctx, LUA_OSLIBNAME );
lua_call(d_ctx, 1, 0);
break;
#endif
case DBG:
lua_pushcfunction( d_ctx, luaopen_debug );
lua_pushstring(d_ctx, LUA_DBLIBNAME );
lua_call(d_ctx, 1, 0);
break;
break;
default:
break;
}
}
bool Engine2::pushFunction(const QByteArray &source, const QByteArray& name )
{
d_lastError = "";
const int status = luaL_loadbuffer( d_ctx, source, source.size(), name );
switch( status )
{
case 0:
// Stack: function
break;
case LUA_ERRSYNTAX:
case LUA_ERRMEM:
d_lastError = lua_tostring( d_ctx, -1 );
lua_pop( d_ctx, 1 ); /* remove error message */
// Stack: -
return false;
}
return true;
}
const char* Engine2::getVersion() const
{
#if LUA_VERSION_NUM >= 501
return LUA_RELEASE;
#else
return lua_version();
#endif
}
static int file_writer (lua_State *L, const void* b, size_t size, void* f)
{
Q_UNUSED(L);
int res = ::fwrite( b, size, 1, (FILE*)f );
if( res != 1 )
return -1; // = error
return 0; // = no error
}
bool Engine2::saveBinary(const QByteArray& source, const QByteArray& name, const QByteArray& path)
{
d_lastError.clear();
FILE* f = ::fopen( path,"wb" );
if( f == 0 )
{
d_lastError = "Unable to open file for writing";
return false;
}
if( !pushFunction( source, name ) )
return false;
// Stack: Function
const int res = lua_dump( d_ctx, file_writer, f);
::fclose( f );
lua_pop( d_ctx, 1 ); // Function
#if LUA_VERSION_NUM >= 501
if( res != 0 )
#else
if( res != 1 )
#endif
{
d_lastError = "Unable to write compiled script";
return false;
}else
return true;
}
bool Engine2::executeCmd(const QByteArray &source, const QByteArray &name)
{
if( d_running )
{
d_lastError = "Cannot run commands while another script is running!";
error( d_lastError );
return false;
}
d_lastError.clear();
d_waitForCommand = false;
d_aliveCount = false;
if( !pushFunction( source, name ) )
{
error( d_lastError );
return false;
}
const bool res = runFunction( 0, LUA_MULTRET );
if( !res )
error( d_lastError );
return res;
}
bool Engine2::executeFile(const QByteArray &path)
{
if( d_running )
{
d_lastError = "Cannot run script while another script is running!";
error( d_lastError );
return false;
}
d_lastError.clear();
d_waitForCommand = false;
d_aliveCount = 0;
switch( luaL_loadfile( d_ctx, path ) )
{
case 0: // no Error
break;
case LUA_ERRFILE:
case LUA_ERRSYNTAX:
case LUA_ERRMEM:
d_lastError = lua_tostring( d_ctx, -1);
lua_pop( d_ctx, 1 ); /* remove error message */
error( d_lastError );
return false;
}
const bool res = runFunction( 0, LUA_MULTRET );
if( !res )
error( d_lastError );
return res;
}
bool Engine2::runFunction(int nargs, int nresults)
{
if( d_running )
{
lua_pop(d_ctx, 1 + nargs);
return false;
}
int preTop = lua_gettop( d_ctx );
if( d_waitForCommand )
{
d_lastError = "Cannot run another Lua function while script is waiting in debugger!";
lua_pop( d_ctx, nargs + 1 ); // funktion + args
if( nresults != LUA_MULTRET )
Q_ASSERT( lua_gettop( d_ctx ) == ( preTop - nargs - 1 ) );
return false;
}
lua_pushcfunction( d_ctx, ErrHandler );
const int errf = preTop-nargs;
lua_insert(d_ctx,errf);
preTop = lua_gettop( d_ctx );
d_lastError.clear();
d_dbgCmd = d_defaultDbgCmd;
d_returns.clear();
notifyStart();
// Lua: All arguments and the function value are popped from the stack when the function is called.
int err = lua_pcall( d_ctx, nargs, nresults, errf );
switch( err )
{
case LUA_ERRRUN:
if( d_dbgCmd != AbortSilently)
{
if( d_dbgCmd == Abort )
d_lastError = "Execution terminated by user";
else
d_lastError = lua_tostring( d_ctx, -1 );
lua_pop( d_ctx, 1 ); /* remove error message */
lua_pop( d_ctx, 1 ); // remove ErrHandler
nresults = 0;
notifyEnd();
return false;
}//else
err = 0;
break;
case LUA_ERRMEM:
d_lastError = "Lua memory exception";
notifyEnd();
return false;
case LUA_ERRERR:
// should not happen
d_lastError = "Lua unknown error";
notifyEnd();
return false;
}
// func + nargs were popped by pcall; nresults were pushed
preTop = preTop - 1 - nargs;
int postTop = lua_gettop( d_ctx );
for( int i = preTop + 1; i <= postTop; i++ )
d_returns << getValueString( i );
if( postTop - preTop )
lua_pop(d_ctx, postTop - preTop );
lua_pop( d_ctx, 1 ); // remove ErrHandler
notifyEnd();
return (err == 0);
}
bool Engine2::addSourceLib(const QByteArray& source, const QByteArray& libname)
{
if( d_waitForCommand )
{
d_lastError = "Cannot run another Lua function while script is waiting in debugger!";
return false;
}
const int prestack = lua_gettop(d_ctx);
lua_pushcfunction( d_ctx, ErrHandler );
const int errf = lua_gettop(d_ctx);
d_lastError.clear();
d_returns.clear();
if( !pushFunction( source, libname ) )
return false;
d_dbgCmd = d_defaultDbgCmd;
d_aliveCount = 0;
notifyStart();
const int err = lua_pcall( d_ctx, 0, 1, errf );
switch( err )
{
case LUA_ERRRUN:
d_lastError = lua_tostring( d_ctx, -1 );
lua_pop( d_ctx, 1 ); /* remove error message */
lua_pop( d_ctx, 1 ); // remove ErrHandler
Q_ASSERT( prestack == lua_gettop(d_ctx) );
notifyEnd();
return false;
case LUA_ERRMEM:
d_lastError = "Lua memory exception";
notifyEnd();
return false;
case LUA_ERRERR:
// should not happen
d_lastError = "Lua unknown error";
notifyEnd();
return false;
}
int stack = lua_gettop(d_ctx);
// stack: lib
// sets it as the value of the global variable libname, sets it as the value of package.loaded[libname]
lua_pushvalue(d_ctx, -1 ); // stack: lib lib
lua_setfield(d_ctx, LUA_GLOBALSINDEX, libname.constData() ); // stack: lib
lua_getfield(d_ctx, LUA_GLOBALSINDEX, "package"); // stack: lib package
lua_getfield(d_ctx, -1, "loaded"); // stack: lib package loaded
lua_pushvalue(d_ctx, -3 ); // stack: lib package loaded lib
lua_setfield(d_ctx, -2, libname.constData() ); // stack: lib package loaded
lua_pop(d_ctx,3); // stack: -
lua_pop( d_ctx, 1 ); // remove ErrHandler
stack = lua_gettop(d_ctx);
Q_ASSERT( prestack == stack );
notifyEnd();
return true;
}
bool Engine2::addPreloadLib(const QByteArray& source, const QByteArray& libname)
{
if( d_waitForCommand )
{
d_lastError = "Cannot run another Lua function while script is waiting in debugger!";
return false;
}
preloads[libname] = source;
lua_getfield(d_ctx, LUA_GLOBALSINDEX, "package"); // stack: package
lua_getfield(d_ctx, -1, "preload"); // stack: package preload
const int preload = lua_gettop(d_ctx);
lua_pushstring(d_ctx, libname.constData() );
lua_pushcfunction(d_ctx, doPreload);
lua_rawset(d_ctx,preload);
lua_pop(d_ctx,1); // remove preload
// remove a possibly remaining version of the last run from package.loaded
// so it is loaded (and the module function is run) again
lua_getfield(d_ctx, -1, "loaded"); // stack: package loaded
const int loaded = lua_gettop(d_ctx);
lua_pushnil(d_ctx); // stack: package loaded nil
lua_setfield(d_ctx, loaded, libname.constData() ); // stack: package loaded
lua_pop(d_ctx,2); // remove package loaded
return true;
}
void Engine2::collect()
{
if( d_ctx )
lua_gc( d_ctx, LUA_GCCOLLECT, 0 );
}
void Engine2::setActiveLevel(int level)
{
if( d_activeLevel == level )
return;
d_activeLevel = level;
notify( ActiveLevel, d_curScript, lineForNotify() );
}
int Engine2::ErrHandler( lua_State* L )
{
// This function leaves the error message just where it is
Engine2* e = Engine2::getInst();
//const char* msg = lua_tostring(L, 1 ); // TEST
if( e == 0 )
{
qWarning() << "Engine2::ErrHandler: getInst returns 0";
return 1;
}
if( e->d_dbgCmd == Abort || e->d_dbgCmd == AbortSilently )
return 1; // don't break if user wants to abort
StackLevel l = e->getStackLevel(0,false);
e->d_breakHit = false;
e->d_curScript = l.d_source;
e->d_curRowCol = l.d_line;
e->d_activeLevel = 0;
e->d_waitForCommand = true;
e->notify( ErrorHit, e->d_curScript, e->lineForNotify() );
if( e->d_dbgShell )
e->d_dbgShell->handleBreak( e, e->d_curScript, e->lineForBreak() );
e->d_waitForCommand = false;
if( e->d_dbgCmd == Abort || e->d_dbgCmd == AbortSilently )
e->notify( Aborted );
else
e->notify( Continued );
return 1;
}
void Engine2::debugHook(lua_State *L, lua_Debug *ar)
{
Engine2* e = Engine2::getInst();
Q_ASSERT( e != 0 );
const StackLevel l = e->getStackLevel(0,false,ar);
const quint32 wasRow = JitComposer::unpackRow(e->d_curRowCol);
const quint32 isRow = JitComposer::unpackRow(l.d_line);
// NOTE: LUA_HOOKTAILRET is defined in lua.h, but never used!
if( ar->event == LUA_HOOKCALL )
{
// HOOKRET comes when already in the function to be called
if( e->d_dbgCmd == StepOut || e->d_dbgCmd == StepOver )
{
if( !l.d_inC )
e->d_stepCallDepth++;
}
return;
}
if( ar->event == LUA_HOOKRET )
// LUA_HOOKRET isn't fired in case of CALLT!!! Use _LJTOOLS_DONT_CREATE_TAIL_CALLS to avoid.
{
// HOOKRET comes when still in the returning function; even the pc is still the same as the previous HOOKLINE
if( e->d_dbgCmd == StepOut || e->d_dbgCmd == StepOver )
{
Q_ASSERT( !l.d_inC && !e->d_stepBreak.first.isEmpty() ); // see runToNextLine
e->d_stepCallDepth--;
if( e->d_stepCallDepth < 0 &&
e->d_stepBreak.first == l.d_source &&
e->d_stepBreak.second == l.d_lineDefined )
e->d_dbgCmd = Engine2::StepNext;
// Change StepOut to StepNext if we leave the function in which StepOut was called (i.e. callDepth<0)
// Change StepOver to StepNext if we're about to leave the function where StepOver was called (i.e. callDepth<0)
else if( e->d_dbgCmd == StepOver && e->d_stepCallDepth == 0 )
{
// if we step over a procedure call reset curLine/Script to the original value to avoid that
// we break twice on the line of the function call (by avoiding lineChanged to become true)
e->d_curScript = e->d_stepBreak.first;
e->d_curRowCol = e->d_stepCurRowCol;
e->d_dbgCmd = Engine2::StepNext;
e->d_stepOverSync = true;
}
}
return;
}
Q_ASSERT( ar->event == LUA_HOOKLINE || ar->event == LUA_HOOKCOUNT );
e->d_aliveCount++;
bool lineChanged = false;
switch( e->d_mode )
{
case LineMode:
if( e->d_stepOverSync && e->d_stepCallDepth == 0 && JitComposer::isRowCol() )
e->d_dbgCmd = StepOver; // happens if arg or a call is yet another call on the same line
else
lineChanged = ( wasRow != isRow || e->d_curScript != l.d_source );
break;
case RowColMode:
case PcMode:
lineChanged = ( unpackDeflinePc(e->d_curRowCol).second != l.d_line || e->d_curScript != l.d_source );
break;
}
e->d_curScript = l.d_source;
if( e->d_mode == PcMode )
e->d_curRowCol = packDeflinePc( JitComposer::unpackRow(l.d_lineDefined),l.d_line);
else
e->d_curRowCol = l.d_line;
if( e->d_mode == PcMode || lineChanged )
{
e->d_breakHit = false;
e->d_activeLevel = 0;
const quint32 line = e->lineForBreak();
if( e->d_dbgCmd == Engine2::StepNext ||
( e->d_dbgCmd == Engine2::StepOver && e->d_stepCallDepth == 0 &&
e->d_stepBreak.first == l.d_source &&
e->d_stepBreak.second == l.d_lineDefined ) )
// the Engine2::StepOver case is still relevant here because we can step over non-calls too.
{
e->d_waitForCommand = true;
e->d_breakHit = true;
e->notify( LineHit, e->d_curScript, e->lineForNotify() );
if( e->d_dbgShell )
e->d_dbgShell->handleBreak( e, e->d_curScript, line );
e->d_waitForCommand = false;
}else if( e->d_breaks.value( e->d_curScript ).contains( line ) )
{
e->d_waitForCommand = true;
e->d_breakHit = true;
e->notify( BreakHit, e->d_curScript,e->lineForNotify() );
if( e->d_dbgShell )
e->d_dbgShell->handleBreak( e, e->d_curScript, line );
e->d_waitForCommand = false;
}
if( e->d_dbgCmd == Abort || e->d_dbgCmd == AbortSilently )
{
lua_pushnil(L);
lua_error(L);
}
e->notify( Continued );
}else if( /* e->d_aliveSignal && */ e->d_aliveCount > s_aliveCount / 2 && e->d_dbgShell )
{
// even if aliveSignal is not enabled it is necessary to give calculation time to the shell
// from time to time during long runs without breaks
e->d_dbgShell->handleAliveSignal( e );
e->d_aliveCount = 0;
#if 0
// why should this be useful?
if( e->isStepping() )
{
e->d_waitForCommand = true;
e->d_breakHit = true;
e->notify( LineHit, e->d_curScript, e->d_curLine );
if( e->d_dbgShell )
e->d_dbgShell->handleBreak( e, e->d_curScript, e->d_curLine );
e->d_waitForCommand = false;
}
#endif
}
e->d_stepOverSync = false;
//else // this doesn't seem to be necessary, even counterproductive
// lua_pop(L, 1); // function
}
void Engine2::aliveSignal(lua_State* L, lua_Debug* ar)
{
Engine2* e = Engine2::getInst();
Q_ASSERT( e != 0 );
if( e->d_dbgShell )
{
e->d_dbgShell->handleAliveSignal(e);
if( e->isStepping() )
{
e->d_waitForCommand = true;
e->notify( LineHit, e->d_curScript, e->lineForNotify() );
e->d_dbgShell->handleBreak( e, e->d_curScript, e->lineForBreak() );
e->d_waitForCommand = false; // TODO
}
}
}
static int array_writer (lua_State *L, const void* b, size_t size, void* f)
{
Q_UNUSED(L);
QByteArray* ba = (QByteArray*)f;
ba->append( QByteArray( (const char *) b, size ) );
return 0; // = no error
}
QByteArray Engine2::getBinaryFromFunc(lua_State *L)
{
if( lua_type(L, -1) != LUA_TFUNCTION )
return QByteArray();
QByteArray ba;
const int res = lua_dump( L, array_writer, &ba );
if( res != 0 )
ba.clear();
return ba;
}
void Engine2::notifyStart()
{
d_running = true;
notify( Started );
}
void Engine2::notifyEnd()
{
d_running = false;
notify( (d_dbgCmd == Abort || d_dbgCmd == AbortSilently)? Aborted : Finished );
}
void Engine2::setDebug(bool on)
{
if( d_debugging == on )
return;
if( on )
{
if( d_mode == PcMode )
lua_sethook( d_ctx, debugHook, LUA_MASKCOUNT | LUA_MASKRET | LUA_MASKCALL, 1);
else
lua_sethook( d_ctx, debugHook, LUA_MASKLINE | LUA_MASKRET | LUA_MASKCALL, 1);
}else if( d_aliveSignal )
lua_sethook( d_ctx, aliveSignal, LUA_MASKCOUNT, s_aliveCount); // get's a hook call with each bytecode op when 1
else
lua_sethook( d_ctx, 0, 0, 0);
d_debugging = on;
}
void Engine2::setJit(bool on)
{
int flags = LUAJIT_MODE_ENGINE;
if( on )
flags |= LUAJIT_MODE_ON;
else
flags |= LUAJIT_MODE_OFF;
luaJIT_setmode( d_ctx, 0, flags );
}
void Engine2::setAliveSignal(bool on)
{
if( d_aliveSignal == on )
return;
d_aliveSignal = on;
if( d_debugging )
return;
d_aliveCount = 0;
if( on )
lua_sethook( d_ctx, aliveSignal, LUA_MASKCOUNT, s_aliveCount);
else
lua_sethook( d_ctx, aliveSignal, 0, 0);
}
void Engine2::setDebugMode(Engine2::Mode m)
{
d_mode = m;
if( d_debugging )
{
setDebug(false);
setDebug(true);
}
}
void Engine2::setBytecodeMode(bool on)
{
d_mode = on ? PcMode : LineMode;
if( d_debugging )
{
setDebug(false);
setDebug(true);
}
}
void Engine2::runToNextLine(DebugCommand where)
{
Q_ASSERT( where == StepNext || where == StepOver || where == StepOut );
d_stepBreak = Break();
if( where == StepOver || where == StepOut )
{
StackLevel l = getStackLevel(0,false);
if( l.d_inC )
{
// an FFI C call apparently never issues a LUA_HOOKLINE or LUA_HOOKRET (but a LUA_HOOKCALL)
where = StepNext;
}else
{
// remember in which function StepOver or StepOut were called
d_stepBreak.first = l.d_source;
d_stepBreak.second = l.d_lineDefined;
d_stepCurRowCol = d_curRowCol;
}
}
d_dbgCmd = where;
d_waitForCommand = false;
d_stepCallDepth = 0;
}
void Engine2::runToBreakPoint()
{
d_dbgCmd = RunToBreakPoint;