kdbg/regwnd.cpp

   1 /*
   2  * Copyright Max Judin, Johannes Sixt, Daniel Kristjansson
   3  * This file is licensed under the GNU General Public License Version 2.
   4  * See the file COPYING in the toplevel directory of the source directory.
   5  */
   6
   7 #include "regwnd.h"
   8 #include "dbgdriver.h"
   9 #include <klocalizedstring.h>           /* i18n */
  10 #include <QFontDatabase>
  11 #include <QMenu>
  12 #include <QRegExp>
  13 #include <QStringList>
  14 #include <QHeaderView>
  15 #include <QContextMenuEvent>
  16 #include <stdlib.h>                     /* strtoul */
  17
  18 /**
  19  * Register display modes
  20  */
  21 class RegisterDisplay {
  22 public:
  23     enum BitSize {
  24         bits8   = 0x10,
  25         bits16  = 0x20,
  26         bits32  = 0x30,
  27         bits64  = 0x40,
  28         bits80  = 0x50,
  29         bits128 = 0x60,
  30         bitsUnknown = 0x70
  31     };
  32
  33     enum Format {
  34         nada    = 0x01,
  35         binary  = 0x02,
  36         octal   = 0x03,
  37         decimal = 0x04,
  38         hex     = 0x05,
  39         bcd     = 0x06,
  40         realE   = 0x07,
  41         realG   = 0x08,
  42         realF   = 0x09
  43     };
  44     RegisterDisplay() : mode(bitsUnknown|nada) { }
  45     RegisterDisplay(uint newMode) : mode(newMode) { }
  46
  47     bool contains(uint pmode) const {
  48         bool val=((mode&0xf0)==pmode)||((mode&0x0f)==pmode);
  49         return val;
  50     }
  51     uint bitsFlag() { return mode&0xf0; }
  52     uint presentationFlag() const { return mode&0x0f; }
  53     uint bits() const { return bitMap[(mode>>4)&0x07]; }
  54     void changeFlag(uint code) {
  55         uint mask=((code&0xf0)==code)?0x0f:0xf0;
  56         mode = code | (mode & mask);
  57     }
  58 private:
  59     uint mode;
  60     static uint bitMap[];
  61 };
  62
  63 // helper struct
  64 struct MenuPair
  65 {
  66     const char* name;
  67     uint mode;
  68     bool isSeparator() { return name == 0; }
  69 };
  70
  71 static MenuPair menuitems[] = {
  72     // treat as
  73     { I18N_NOOP("&GDB default"), RegisterDisplay::nada },
  74     { I18N_NOOP("&Binary"),      RegisterDisplay::binary },
  75     { I18N_NOOP("&Octal"),       RegisterDisplay::octal },
  76     { I18N_NOOP("&Decimal"),     RegisterDisplay::decimal },
  77     { I18N_NOOP("He&xadecimal"), RegisterDisplay::hex },
  78     { I18N_NOOP("Real (&e)"),    RegisterDisplay::realE },
  79     { I18N_NOOP("Real (&f)"),    RegisterDisplay::realF },
  80     { I18N_NOOP("&Real (g)"),    RegisterDisplay::realG },
  81     { 0, 0 },
  82     { "8 bits",  RegisterDisplay::bits8 },
  83     { "16 bits", RegisterDisplay::bits16 },
  84     { "32 bits", RegisterDisplay::bits32 },
  85     { "64 bits", RegisterDisplay::bits64 },
  86     { "80 bits", RegisterDisplay::bits80 },
  87     { "128 bits",RegisterDisplay::bits128 },
  88 };
  89
  90 uint RegisterDisplay::bitMap[] = {
  91   0, 8, 16, 32,
  92   64, 80, 128, /*default*/32,
  93 };
  94
  95 class ModeItem : public QTreeWidgetItem
  96 {
  97 public:
  98     ModeItem(QTreeWidget* parent, const QString& name) : QTreeWidgetItem(parent, QStringList(name)) {}
  99     ModeItem(QTreeWidgetItem* parent) : QTreeWidgetItem(parent) {}
 100
 101     virtual void setMode(RegisterDisplay mode) = 0;
 102     virtual RegisterDisplay mode() = 0;
 103 };
 104
 105 class GroupingViewItem : public ModeItem
 106 {
 107 public:
 108     GroupingViewItem(RegisterView* parent,
 109                      const QString& name, const QString& pattern,
 110                      RegisterDisplay mode) :
 111         ModeItem(parent, name), matcher(pattern), gmode(mode)
 112     {
 113         setExpanded(true);
 114         setFirstColumnSpanned(true);
 115     }
 116
 117     bool matchName(const QString& str) const
 118     {
 119         return matcher.exactMatch(str);
 120     }
 121
 122     virtual void setMode(RegisterDisplay mode)
 123     {
 124         gmode=mode;
 125         for(int i = 0; i < childCount(); i++)
 126         {
 127             static_cast<ModeItem*>(child(i))->setMode(gmode);
 128         }
 129     }
 130
 131     virtual RegisterDisplay mode()
 132     {
 133         return gmode;
 134     }
 135
 136 private:
 137     QRegExp matcher;
 138     RegisterDisplay gmode;
 139 };
 140
 141 class RegisterViewItem : public ModeItem
 142 {
 143 public:
 144     RegisterViewItem(GroupingViewItem* parent,
 145                      const RegisterInfo& regInfo);
 146     ~RegisterViewItem();
 147
 148     void setValue(const RegisterInfo& regInfo);
 149     virtual void setMode(RegisterDisplay mode);
 150     virtual RegisterDisplay mode() { return m_mode; }
 151     RegisterInfo m_reg;
 152     RegisterDisplay m_mode;             /* display mode */
 153     bool m_changes;
 154     bool m_found;
 155 };
 156
 157
 158 RegisterViewItem::RegisterViewItem(GroupingViewItem* parent,
 159                                    const RegisterInfo& regInfo) :
 160         ModeItem(parent),
 161         m_reg(regInfo),
 162         m_changes(false),
 163         m_found(true)
 164 {
 165     setValue(m_reg);
 166     setText(0, m_reg.regName);
 167     setMode(parent->mode());
 168 }
 169
 170 RegisterViewItem::~RegisterViewItem()
 171 {
 172 }
 173
 174 /*
 175  * We must be careful when converting the hex value because
 176  * it may exceed this computer's long values.
 177  */
 178 inline int hexCharToDigit(char h)
 179 {
 180     if (h < '0')
 181         return -1;
 182     if (h <= '9')
 183         return h - '0';
 184     if (h < 'A')
 185         return -1;
 186     if (h <= 'F')
 187         return h - ('A' - 10);
 188     if (h < 'a')
 189         return -1;
 190     if (h <= 'f')
 191         return h - ('a' - 10);
 192     return -1;
 193 }
 194
 195 static QString toBinary(QString hex)
 196 {
 197     static const char digits[16][8] = {
 198         "0000", "0001", "0010", "0011", "0100", "0101", "0110", "0111",
 199         "1000", "1001", "1010", "1011", "1100", "1101", "1110", "1111"
 200     };
 201     QString result;
 202
 203     for (int i = 2; i < hex.length(); i++) {
 204         int idx = hexCharToDigit(hex[i].toLatin1());
 205         if (idx < 0) {
 206             // not a hex digit; no conversion
 207             return hex;
 208         }
 209         const char* bindigits = digits[idx];
 210         result += bindigits;
 211     }
 212     // remove leading zeros
 213     switch (hexCharToDigit(hex[2].toLatin1())) {
 214     case 0: case 1: result.remove(0, 3); break;
 215     case 2: case 3: result.remove(0, 2); break;
 216     case 4: case 5:
 217     case 6: case 7: result.remove(0, 1); break;
 218     }
 219     return result;
 220 }
 221
 222 static QString toOctal(QString hex)
 223 {
 224     QString result;
 225     int shift = 0;
 226     unsigned v = 0;
 227     for (int i = hex.length()-1; i >= 2; i--) {
 228         int idx = hexCharToDigit(hex[i].toLatin1());
 229         if (idx < 0)
 230             return hex;
 231         v += idx << shift;
 232         result.insert(0, (v & 7) + '0');
 233         v >>= 3;
 234         shift++;
 235         if (shift == 3) {
 236             // an extra digit this round
 237             result.insert(0, v + '0');
 238             shift = v = 0;
 239         }
 240     }
 241     if (v != 0) {
 242         result.insert(0, v + '0');
 243     }
 244     return "0" + result;
 245 }
 246
 247 static QString toDecimal(QString hex)
 248 {
 249     /*
 250      * We convert only numbers that are small enough for this computer's
 251      * size of long integers.
 252      */
 253     if (hex.length() > int(sizeof(unsigned long)*2+2))  /*  count in leading "0x" */
 254         return hex;
 255
 256     bool ok = false;
 257     unsigned long val = hex.toULong(&ok, 0);
 258     if (!ok)
 259         return hex;
 260     else
 261         return QString().setNum(val);
 262 }
 263
 264 static QString toBCD(const QString& hex)
 265 {
 266     return hex.right(2);
 267 }
 268
 269 static char* toRaw(const QString& hex, uint& length)
 270 {
 271     static uint testNum=1;
 272     static void* testVoid=(void*)&testNum;
 273     static char* testChar=(char*)testVoid;
 274     static bool littleendian=(*testChar==1);
 275
 276     length=((hex.length()-2)%2)+((hex.length()-2)/2);
 277     char* data=new char[length];
 278
 279     if (littleendian) {
 280         uint j=0;
 281         if (hex.length()<=2) return 0;
 282         for (int i=hex.length()-1; i>=2; ) {
 283             if (j%2==0)
 284                 data[j/2]=hexCharToDigit(hex[i].toLatin1());
 285             else
 286                 data[j/2]|=(hexCharToDigit(hex[i].toLatin1())<<4);
 287             i--;j++;
 288         }
 289     } else { // big endian
 290         uint j=0;
 291         if (hex.length()<=2) return 0;
 292         for (int i=2; i<hex.length(); ) {
 293             if (j%2==0)
 294                 data[j/2]=hexCharToDigit(hex[i].toLatin1())<<4;
 295             else
 296                 data[j/2]|=hexCharToDigit(hex[i].toLatin1());
 297             i++;j++;
 298         }
 299     }
 300     return data;
 301 }
 302
 303 static long double extractNumber(const QString& hex)
 304 {
 305     uint length;
 306     char* data=toRaw(hex, length);
 307     long double val;
 308     if (length==4) { // float
 309         val=*((float*)data);
 310     } else if (length==8) { // double
 311         val=*((double*)data);
 312     } else if (length==10) { // long double
 313         val=*((long double*)data);
 314     } else {
 315         val=*((float*)data);
 316     }
 317     delete[] data;
 318
 319     return val;
 320 }
 321
 322 static QString toFloat(const QString& hex, char p)
 323 {
 324     int prec=6;
 325     if (hex.length() <= 10)
 326         prec = 6;
 327     else if (hex.length() <= 18)
 328         prec = 17;
 329     else
 330         prec = 20;
 331
 332     char fmt[8] = "%.*Lf";
 333     fmt[4] = p;
 334     char buf[50];
 335     sprintf(buf, fmt, prec, extractNumber(hex));
 336     QString cooked = QString::fromLatin1(buf);
 337     if (p=='e') {
 338         prec+=7;
 339         while (cooked.length()<prec) cooked=cooked.prepend(" ");
 340     }
 341     return cooked;
 342 }
 343
 344 static QString convertSingle(const QString& raw, const RegisterDisplay mode)
 345 {
 346     switch (mode.presentationFlag()) {
 347     case RegisterDisplay::binary:  return toBinary(raw);
 348     case RegisterDisplay::octal:   return toOctal(raw);
 349     case RegisterDisplay::decimal: return toDecimal(raw);
 350     case RegisterDisplay::hex:     return raw;
 351     case RegisterDisplay::bcd:     return toBCD(raw);
 352     case RegisterDisplay::realE:   return toFloat(raw, 'e');
 353     case RegisterDisplay::realG:   return toFloat(raw, 'g');
 354     case RegisterDisplay::realF:   return toFloat(raw, 'f');
 355     default: return raw;
 356     }
 357 }
 358
 359 QString convertRaw(const RegisterInfo reg, RegisterDisplay mode)
 360 {
 361     QString cooked;
 362     int totalNibles=0, nibles=mode.bits()>>2;
 363     if (RegisterDisplay::nada!=mode.presentationFlag() &&
 364         reg.rawValue.length() > 2 && reg.rawValue[0] == '0' && reg.rawValue[1] == 'x')
 365     {
 366         if ("uint128"==reg.type) totalNibles=32;
 367         else if ("uint64"==reg.type) totalNibles=16;
 368         else if (reg.type.isEmpty()) totalNibles=nibles;
 369         else {
 370             return "don't know how to handle vector type <"+reg.type+">";
 371         }
 372         if (0==nibles) nibles=8; // default to 4 byte, 32 bits values
 373         if (nibles>totalNibles) totalNibles=nibles; // minimum one value
 374
 375         QString raw=reg.rawValue.right(reg.rawValue.length()-2); // clip off "0x"
 376         while (raw.length()<totalNibles) raw.prepend("0"); // pad out to totalNibles
 377
 378         QString separator=",";  // locale-specific?
 379         for (int nib=totalNibles-nibles; nib>=0; nib-=nibles) {
 380             QString qstr=convertSingle(raw.mid(nib, nibles).prepend("0x"), mode);
 381
 382             if (nib==int(totalNibles-nibles)) cooked=qstr+cooked;
 383             else cooked=qstr+separator+cooked;
 384         }
 385     }
 386     else
 387     {
 388         cooked = reg.cookedValue;
 389     }
 390     if (!cooked.isEmpty() && cooked.at(0) != ' ' && cooked.at(0) != '-' && cooked.at(0) != '+')
 391         cooked.prepend(" ");
 392     return cooked;
 393 }
 394
 395 void RegisterViewItem::setValue(const RegisterInfo& reg)
 396 {
 397     m_reg = reg;
 398
 399     setText(1, reg.rawValue);
 400     QString cookedValue = convertRaw(reg, m_mode);
 401     setText(2, cookedValue);
 402 }
 403
 404 void RegisterViewItem::setMode(RegisterDisplay mode)
 405 {
 406     m_mode = mode;
 407
 408     QString cookedValue = convertRaw(m_reg, mode);
 409     setText(2, cookedValue);
 410 }
 411
 412
 413 RegisterView::RegisterView(QWidget* parent) :
 414         QTreeWidget(parent)
 415 {
 416     setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
 417
 418     QTreeWidgetItem* header = headerItem();
 419     header->setText(0, i18n("Register"));
 420     header->setText(1, i18n("Value"));
 421     header->setText(2, i18n("Decoded value"));
 422
 423     setAllColumnsShowFocus(true);
 424
 425     m_modemenu = new QMenu("ERROR", this);
 426     for (uint i=0; i<sizeof(menuitems)/sizeof(MenuPair); i++) {
 427         if (menuitems[i].isSeparator())
 428             m_modemenu->addSeparator();
 429         else {
 430             QAction* action = m_modemenu->addAction(i18n(menuitems[i].name));
 431             action->setData(menuitems[i].mode);
 432             action->setCheckable(true);
 433         }
 434     }
 435     connect(m_modemenu, SIGNAL(triggered(QAction*)), SLOT(slotModeChange(QAction*)));
 436
 437     new GroupingViewItem(this, i18n("GP and others"), "^$",
 438                          RegisterDisplay::nada);
 439     new GroupingViewItem(this, i18n("Flags"),
 440                          "(^eflags$|^fctrl$|^mxcsr$|^cr$|^fpscr$|^vscr$|^ftag$|^fstat$)",
 441                          RegisterDisplay::bits32|RegisterDisplay::binary);
 442     new GroupingViewItem(this, i18n("x86/x87 segment"),
 443                          "(^cs$|^ss$|^ds$|^es$|^fs$|^gs$|^fiseg$|^foseg$)",
 444                          RegisterDisplay::nada);
 445     new GroupingViewItem(this, "x87", "^st.*",
 446                          RegisterDisplay::bits80|RegisterDisplay::realE);
 447     new GroupingViewItem(this, "SSE", "^xmm.*",
 448                          RegisterDisplay::bits32|RegisterDisplay::realE);
 449     new GroupingViewItem(this, "MMX", "^mm.*",
 450                          RegisterDisplay::bits32|RegisterDisplay::realE);
 451     new GroupingViewItem(this, "POWER real", "^fpr.*",
 452                          RegisterDisplay::bits32|RegisterDisplay::realE);
 453     new GroupingViewItem(this, "AltiVec", "^vr.*",
 454                          RegisterDisplay::bits32|RegisterDisplay::realE);
 455     new GroupingViewItem(this, "MIPS VU", "^vu.*",
 456                          RegisterDisplay::bits32|RegisterDisplay::realE);
 457
 458     updateGroupVisibility();
 459     setRootIsDecorated(true);
 460
 461     resize(200,300);
 462 }
 463
 464 RegisterView::~RegisterView()
 465 {
 466 }
 467
 468 GroupingViewItem* RegisterView::findMatchingGroup(const QString& regName)
 469 {
 470     for (int i = 0; i < topLevelItemCount(); i++)
 471     {
 472         GroupingViewItem* it = static_cast<GroupingViewItem*>(topLevelItem(i));
 473         if (it->matchName(regName))
 474             return it;
 475     }
 476     // not better match found, so return "GP and others"
 477     return static_cast<GroupingViewItem*>(topLevelItem(0));
 478 }
 479
 480 GroupingViewItem* RegisterView::findGroup(const QString& groupName)
 481 {
 482     for (int i = 0; i < topLevelItemCount(); i++)
 483     {
 484         QTreeWidgetItem* it = topLevelItem(i);
 485         if (it->text(0) == groupName)
 486             return static_cast<GroupingViewItem*>(it);
 487     }
 488     // return that nothing was found.
 489     return 0;
 490 }
 491
 492 // only show a group if it has subitems.
 493 void RegisterView::updateGroupVisibility()
 494 {
 495     for(int i = 0; i < topLevelItemCount(); i++)
 496     {
 497         QTreeWidgetItem* item = topLevelItem(i);
 498         item->setHidden(item->childCount() == 0);
 499     }
 500 }
 501
 502 void RegisterView::updateRegisters(const std::list<RegisterInfo>& regs)
 503 {
 504     setUpdatesEnabled(false);
 505
 506     // mark all items as 'not found'
 507     for (RegMap::iterator i = m_registers.begin(); i != m_registers.end(); ++i)
 508     {
 509         i->second->m_found = false;
 510     }
 511
 512     // parse register values
 513     for (std::list<RegisterInfo>::const_iterator reg = regs.begin(); reg != regs.end(); ++reg)
 514     {
 515         // check if this is a new register
 516         RegMap::iterator i = m_registers.find(reg->regName);
 517
 518         if (i != m_registers.end())
 519         {
 520             RegisterViewItem* it = i->second;
 521             it->m_found = true;
 522             if (it->m_reg.rawValue != reg->rawValue ||
 523                 it->m_reg.cookedValue != reg->cookedValue)
 524             {
 525                 it->m_changes = true;
 526                 it->setValue(*reg);
 527
 528                 it->setForeground(0,Qt::red);
 529                 it->setForeground(1,Qt::red);
 530                 it->setForeground(2,Qt::red);
 531
 532             } else {
 533                 /*
 534                  * If there was a change last time, but not now, we
 535                  * must revert the color.
 536                  */
 537                 if (it->m_changes) {
 538                     it->m_changes = false;
 539                     it->setForeground(0,Qt::black);
 540                     it->setForeground(1,Qt::black);
 541                     it->setForeground(2,Qt::black);
 542                 }
 543             }
 544         }
 545         else
 546         {
 547             GroupingViewItem* group = findMatchingGroup(reg->regName);
 548             m_registers[reg->regName] =
 549                 new RegisterViewItem(group, *reg);
 550         }
 551     }
 552
 553     // remove all 'not found' items;
 554     QStringList del;
 555     for (RegMap::iterator i = m_registers.begin(); i != m_registers.end(); ++i)
 556     {
 557         if (!i->second->m_found) {
 558             del.push_back(i->first);
 559         }
 560     }
 561     for (QStringList::Iterator i = del.begin(); i != del.end(); ++i)
 562     {
 563         RegMap::iterator it = m_registers.find(*i);
 564         delete it->second;
 565         m_registers.erase(it);
 566     }
 567
 568     updateGroupVisibility();
 569     setUpdatesEnabled(true);
 570 }
 571
 572
 573 void RegisterView::contextMenuEvent(QContextMenuEvent* event)
 574 {
 575     QTreeWidgetItem *item = itemAt(event->pos());
 576
 577     if (item) {
 578         RegisterDisplay mode=static_cast<ModeItem*>(item)->mode();
 579         int i = 0;
 580         foreach(QAction* action, m_modemenu->actions())
 581         {
 582             action->setChecked(mode.contains(menuitems[i].mode));
 583             ++i;
 584         }
 585         m_modemenu->setTitle(item->text(0));
 586         m_modemenu->popup(event->globalPos());
 587
 588         event->accept();
 589     }
 590 }
 591
 592 void RegisterView::slotModeChange(QAction* action)
 593 {
 594     RegMap::iterator it=m_registers.find(m_modemenu->title());
 595     ModeItem* view;
 596     if (it != m_registers.end())
 597         view = it->second;
 598     else
 599         view = findGroup(m_modemenu->title());
 600
 601     if (view) {
 602         RegisterDisplay mode = view->mode();
 603         mode.changeFlag(action->data().toInt());
 604         view->setMode(mode);
 605     }
 606 }
 607
 608 void RegisterView::changeEvent(QEvent* ev)
 609 {
 610     switch (ev->type()) {
 611     case QEvent::ApplicationFontChange:
 612     case QEvent::FontChange:
 613         setFont(QFontDatabase::systemFont(QFontDatabase::FixedFont));
 614         break;
 615     default:
 616         break;
 617     }
 618     QTreeWidget::changeEvent(ev);
 619 }
 620
 621 #include "regwnd.moc"