kdbg/gdbdriver.cpp

   1 // $Id$
   2
   3 // Copyright by Johannes Sixt
   4 // This file is under GPL, the GNU General Public Licence
   5
   6 #include "gdbdriver.h"
   7 #include "exprwnd.h"
   8 #include <qregexp.h>
   9 #include <qstringlist.h>
  10 #include <klocale.h>                    /* i18n */
  11 #include <ctype.h>
  12 #include <stdlib.h>                     /* strtol, atoi */
  13 #include <string.h>                     /* strcpy */
  14
  15 #include "assert.h"
  16 #ifdef HAVE_CONFIG_H
  17 #include "config.h"
  18 #endif
  19 #include "mydebug.h"
  20
  21 static void skipString(const char*& p);
  22 static void skipNested(const char*& s, char opening, char closing);
  23 static ExprValue* parseVar(const char*& s);
  24 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind);
  25 static bool parseValue(const char*& s, ExprValue* variable);
  26 static bool parseNested(const char*& s, ExprValue* variable);
  27 static bool parseVarSeq(const char*& s, ExprValue* variable);
  28 static bool parseValueSeq(const char*& s, ExprValue* variable);
  29
  30 #define PROMPT "(kdbg)"
  31 #define PROMPT_LEN 6
  32 #define PROMPT_LAST_CHAR ')'            /* needed when searching for prompt string */
  33
  34
  35 // TODO: make this cmd info stuff non-static to allow multiple
  36 // simultaneous gdbs to run!
  37
  38 struct GdbCmdInfo {
  39     DbgCommand cmd;
  40     const char* fmt;                    /* format string */
  41     enum Args {
  42         argNone, argString, argNum,
  43         argStringNum, argNumString,
  44         argString2, argNum2
  45     } argsNeeded;
  46 };
  47
  48 #if 0
  49 // This is  how the QString data print statement generally looks like.
  50 // It is set by KDebugger via setPrintQStringDataCmd().
  51
  52 static const char printQStringStructFmt[] =
  53                 // if the string data is junk, fail early
  54                 "print ($qstrunicode=($qstrdata=(%s))->unicode)?"
  55                 // print an array of shorts
  56                 "(*(unsigned short*)$qstrunicode)@"
  57                 // limit the length
  58                 "(($qstrlen=(unsigned int)($qstrdata->len))>100?100:$qstrlen)"
  59                 // if unicode data is 0, report a special value
  60                 ":1==0\n";
  61 #endif
  62 static const char printQStringStructFmt[] = "print (0?\"%s\":$kdbgundef)\n";
  63
  64 /*
  65  * The following array of commands must be sorted by the DC* values,
  66  * because they are used as indices.
  67  */
  68 static GdbCmdInfo cmds[] = {
  69     { DCinitialize, "", GdbCmdInfo::argNone },
  70     { DCtty, "tty %s\n", GdbCmdInfo::argString },
  71     { DCexecutable, "file \"%s\"\n", GdbCmdInfo::argString },
  72     { DCtargetremote, "target remote %s\n", GdbCmdInfo::argString },
  73     { DCcorefile, "core-file %s\n", GdbCmdInfo::argString },
  74     { DCattach, "attach %s\n", GdbCmdInfo::argString },
  75     { DCinfolinemain, "kdbg_infolinemain\n", GdbCmdInfo::argNone },
  76     { DCinfolocals, "kdbg__alllocals\n", GdbCmdInfo::argNone },
  77     { DCinforegisters, "info all-registers\n", GdbCmdInfo::argNone},
  78     { DCexamine, "x %s %s\n", GdbCmdInfo::argString2 },
  79     { DCinfoline, "info line %s:%d\n", GdbCmdInfo::argStringNum },
  80     { DCdisassemble, "disassemble %s %s\n", GdbCmdInfo::argString2 },
  81     { DCsetargs, "set args %s\n", GdbCmdInfo::argString },
  82     { DCsetenv, "set env %s %s\n", GdbCmdInfo::argString2 },
  83     { DCunsetenv, "unset env %s\n", GdbCmdInfo::argString },
  84     { DCsetoption, "setoption %s %d\n", GdbCmdInfo::argStringNum},
  85     { DCcd, "cd %s\n", GdbCmdInfo::argString },
  86     { DCbt, "bt\n", GdbCmdInfo::argNone },
  87     { DCrun, "run\n", GdbCmdInfo::argNone },
  88     { DCcont, "cont\n", GdbCmdInfo::argNone },
  89     { DCstep, "step\n", GdbCmdInfo::argNone },
  90     { DCstepi, "stepi\n", GdbCmdInfo::argNone },
  91     { DCnext, "next\n", GdbCmdInfo::argNone },
  92     { DCnexti, "nexti\n", GdbCmdInfo::argNone },
  93     { DCfinish, "finish\n", GdbCmdInfo::argNone },
  94     { DCuntil, "until %s:%d\n", GdbCmdInfo::argStringNum },
  95     { DCkill, "kill\n", GdbCmdInfo::argNone },
  96     { DCbreaktext, "break %s\n", GdbCmdInfo::argString },
  97     { DCbreakline, "break %s:%d\n", GdbCmdInfo::argStringNum },
  98     { DCtbreakline, "tbreak %s:%d\n", GdbCmdInfo::argStringNum },
  99     { DCbreakaddr, "break *%s\n", GdbCmdInfo::argString },
 100     { DCtbreakaddr, "tbreak *%s\n", GdbCmdInfo::argString },
 101     { DCwatchpoint, "watch %s\n", GdbCmdInfo::argString },
 102     { DCdelete, "delete %d\n", GdbCmdInfo::argNum },
 103     { DCenable, "enable %d\n", GdbCmdInfo::argNum },
 104     { DCdisable, "disable %d\n", GdbCmdInfo::argNum },
 105     { DCprint, "print %s\n", GdbCmdInfo::argString },
 106     { DCprintDeref, "print *(%s)\n", GdbCmdInfo::argString },
 107     { DCprintStruct, "print %s\n", GdbCmdInfo::argString },
 108     { DCprintQStringStruct, printQStringStructFmt, GdbCmdInfo::argString},
 109     { DCframe, "frame %d\n", GdbCmdInfo::argNum },
 110     { DCfindType, "whatis %s\n", GdbCmdInfo::argString },
 111     { DCinfosharedlib, "info sharedlibrary\n", GdbCmdInfo::argNone },
 112     { DCthread, "thread %d\n", GdbCmdInfo::argNum },
 113     { DCinfothreads, "info threads\n", GdbCmdInfo::argNone },
 114     { DCinfobreak, "info breakpoints\n", GdbCmdInfo::argNone },
 115     { DCcondition, "condition %d %s\n", GdbCmdInfo::argNumString},
 116     { DCsetpc, "set variable $pc=%s\n", GdbCmdInfo::argString },
 117     { DCignore, "ignore %d %d\n", GdbCmdInfo::argNum2},
 118     { DCprintWChar, "print ($s=%s)?*$s@wcslen($s):0x0\n", GdbCmdInfo::argString },
 119     { DCsetvariable, "set variable %s=%s\n", GdbCmdInfo::argString2 },
 120 };
 121
 122 #define NUM_CMDS (int(sizeof(cmds)/sizeof(cmds[0])))
 123 #define MAX_FMTLEN 200
 124
 125 GdbDriver::GdbDriver() :
 126         DebuggerDriver(),
 127         m_gdbMajor(4), m_gdbMinor(16)
 128 {
 129     strcpy(m_prompt, PROMPT);
 130     m_promptMinLen = PROMPT_LEN;
 131     m_promptLastChar = PROMPT_LAST_CHAR;
 132
 133 #ifndef NDEBUG
 134     // check command info array
 135     char* perc;
 136     for (int i = 0; i < NUM_CMDS; i++) {
 137         // must be indexable by DbgCommand values, i.e. sorted by DbgCommand values
 138         assert(i == cmds[i].cmd);
 139         // a format string must be associated
 140         assert(cmds[i].fmt != 0);
 141         assert(strlen(cmds[i].fmt) <= MAX_FMTLEN);
 142         // format string must match arg specification
 143         switch (cmds[i].argsNeeded) {
 144         case GdbCmdInfo::argNone:
 145             assert(strchr(cmds[i].fmt, '%') == 0);
 146             break;
 147         case GdbCmdInfo::argString:
 148             perc = strchr(cmds[i].fmt, '%');
 149             assert(perc != 0 && perc[1] == 's');
 150             assert(strchr(perc+2, '%') == 0);
 151             break;
 152         case GdbCmdInfo::argNum:
 153             perc = strchr(cmds[i].fmt, '%');
 154             assert(perc != 0 && perc[1] == 'd');
 155             assert(strchr(perc+2, '%') == 0);
 156             break;
 157         case GdbCmdInfo::argStringNum:
 158             perc = strchr(cmds[i].fmt, '%');
 159             assert(perc != 0 && perc[1] == 's');
 160             perc = strchr(perc+2, '%');
 161             assert(perc != 0 && perc[1] == 'd');
 162             assert(strchr(perc+2, '%') == 0);
 163             break;
 164         case GdbCmdInfo::argNumString:
 165             perc = strchr(cmds[i].fmt, '%');
 166             assert(perc != 0 && perc[1] == 'd');
 167             perc = strchr(perc+2, '%');
 168             assert(perc != 0 && perc[1] == 's');
 169             assert(strchr(perc+2, '%') == 0);
 170             break;
 171         case GdbCmdInfo::argString2:
 172             perc = strchr(cmds[i].fmt, '%');
 173             assert(perc != 0 && perc[1] == 's');
 174             perc = strchr(perc+2, '%');
 175             assert(perc != 0 && perc[1] == 's');
 176             assert(strchr(perc+2, '%') == 0);
 177             break;
 178         case GdbCmdInfo::argNum2:
 179             perc = strchr(cmds[i].fmt, '%');
 180             assert(perc != 0 && perc[1] == 'd');
 181             perc = strchr(perc+2, '%');
 182             assert(perc != 0 && perc[1] == 'd');
 183             assert(strchr(perc+2, '%') == 0);
 184             break;
 185         }
 186     }
 187     assert(strlen(printQStringStructFmt) <= MAX_FMTLEN);
 188 #endif
 189 }
 190
 191 GdbDriver::~GdbDriver()
 192 {
 193 }
 194
 195
 196 QString GdbDriver::driverName() const
 197 {
 198     return "GDB";
 199 }
 200
 201 QString GdbDriver::defaultGdb()
 202 {
 203     return
 204         "gdb"
 205         " --fullname"   /* to get standard file names each time the prog stops */
 206         " --nx";        /* do not execute initialization files */
 207 }
 208
 209 QString GdbDriver::defaultInvocation() const
 210 {
 211     if (m_defaultCmd.isEmpty()) {
 212         return defaultGdb();
 213     } else {
 214         return m_defaultCmd;
 215     }
 216 }
 217
 218 QStringList GdbDriver::boolOptionList() const
 219 {
 220     // no options
 221     return QStringList();
 222 }
 223
 224 bool GdbDriver::startup(QString cmdStr)
 225 {
 226     if (!DebuggerDriver::startup(cmdStr))
 227         return false;
 228
 229     static const char gdbInitialize[] =
 230         /*
 231          * Work around buggy gdbs that do command line editing even if they
 232          * are not on a tty. The readline library echos every command back
 233          * in this case, which is confusing for us.
 234          */
 235         "set editing off\n"
 236         "set confirm off\n"
 237         "set print static-members off\n"
 238         "set print asm-demangle on\n"
 239         /*
 240          * Don't assume that program functions invoked from a watch expression
 241          * always succeed.
 242          */
 243         "set unwindonsignal on\n"
 244         /*
 245          * Write a short macro that prints all locals: local variables and
 246          * function arguments.
 247          */
 248         "define kdbg__alllocals\n"
 249         "info locals\n"                 /* local vars supersede args with same name */
 250         "info args\n"                   /* therefore, arguments must come last */
 251         "end\n"
 252         /*
 253          * Work around a bug in gdb-6.3: "info line main" crashes gdb.
 254          */
 255         "define kdbg_infolinemain\n"
 256         "list\n"
 257         "info line\n"
 258         "end\n"
 259         // change prompt string and synchronize with gdb
 260         "set prompt " PROMPT "\n"
 261         ;
 262
 263     executeCmdString(DCinitialize, gdbInitialize, false);
 264
 265     // assume that QString::null is ok
 266     cmds[DCprintQStringStruct].fmt = printQStringStructFmt;
 267
 268     return true;
 269 }
 270
 271 void GdbDriver::commandFinished(CmdQueueItem* cmd)
 272 {
 273     // command string must be committed
 274     if (!cmd->m_committed) {
 275         // not commited!
 276         TRACE("calling " + (__PRETTY_FUNCTION__ + (" with uncommited command:\n\t" +
 277               cmd->m_cmdString)));
 278         return;
 279     }
 280
 281     switch (cmd->m_cmd) {
 282     case DCinitialize:
 283         // get version number from preamble
 284         {
 285             int len;
 286             QRegExp GDBVersion("\\nGDB [0-9]+\\.[0-9]+");
 287             int offset = GDBVersion.match(m_output, 0, &len);
 288             if (offset >= 0) {
 289                 char* start = m_output + offset + 5;    // skip "\nGDB "
 290                 char* end;
 291                 m_gdbMajor = strtol(start, &end, 10);
 292                 m_gdbMinor = strtol(end + 1, 0, 10);    // skip "."
 293                 if (start == end) {
 294                     // nothing was parsed
 295                     m_gdbMajor = 4;
 296                     m_gdbMinor = 16;
 297                 }
 298             } else {
 299                 // assume some default version (what would make sense?)
 300                 m_gdbMajor = 4;
 301                 m_gdbMinor = 16;
 302             }
 303             // use a feasible core-file command
 304             if (m_gdbMajor > 4 || (m_gdbMajor == 4 && m_gdbMinor >= 16)) {
 305                 cmds[DCcorefile].fmt = "target core %s\n";
 306             } else {
 307                 cmds[DCcorefile].fmt = "core-file %s\n";
 308             }
 309         }
 310         break;
 311     default:;
 312     }
 313
 314     /* ok, the command is ready */
 315     emit commandReceived(cmd, m_output);
 316
 317     switch (cmd->m_cmd) {
 318     case DCcorefile:
 319     case DCinfolinemain:
 320     case DCframe:
 321     case DCattach:
 322     case DCrun:
 323     case DCcont:
 324     case DCstep:
 325     case DCstepi:
 326     case DCnext:
 327     case DCnexti:
 328     case DCfinish:
 329     case DCuntil:
 330         parseMarker();
 331     default:;
 332     }
 333 }
 334
 335 /*
 336  * The --fullname option makes gdb send a special normalized sequence print
 337  * each time the program stops and at some other points. The sequence has
 338  * the form "\032\032filename:lineno:charoffset:(beg|middle):address".
 339  */
 340 void GdbDriver::parseMarker()
 341 {
 342     char* startMarker = strstr(m_output, "\032\032");
 343     if (startMarker == 0)
 344         return;
 345
 346     // extract the marker
 347     startMarker += 2;
 348     TRACE(QString("found marker: ") + startMarker);
 349     char* endMarker = strchr(startMarker, '\n');
 350     if (endMarker == 0)
 351         return;
 352
 353     *endMarker = '\0';
 354
 355     // extract filename and line number
 356     static QRegExp MarkerRE(":[0-9]+:[0-9]+:[begmidl]+:0x");
 357
 358     int len;
 359     int lineNoStart = MarkerRE.match(startMarker, 0, &len);
 360     if (lineNoStart >= 0) {
 361         int lineNo = atoi(startMarker + lineNoStart+1);
 362
 363         // get address
 364         const char* addrStart = startMarker + lineNoStart + len - 2;
 365         DbgAddr address = QString(addrStart).stripWhiteSpace();
 366
 367         // now show the window
 368         startMarker[lineNoStart] = '\0';   /* split off file name */
 369         emit activateFileLine(startMarker, lineNo-1, address);
 370     }
 371 }
 372
 373
 374 /*
 375  * Escapes characters that might lead to problems when they appear on gdb's
 376  * command line.
 377  */
 378 static void normalizeStringArg(QString& arg)
 379 {
 380     /*
 381      * Remove trailing backslashes. This approach is a little simplistic,
 382      * but we know that there is at the moment no case where a trailing
 383      * backslash would make sense.
 384      */
 385     while (!arg.isEmpty() && arg[arg.length()-1] == '\\') {
 386         arg = arg.left(arg.length()-1);
 387     }
 388 }
 389
 390
 391 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg)
 392 {
 393     assert(cmd >= 0 && cmd < NUM_CMDS);
 394     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString);
 395
 396     normalizeStringArg(strArg);
 397
 398     if (cmd == DCcd) {
 399         // need the working directory when parsing the output
 400         m_programWD = strArg;
 401     } else if (cmd == DCsetargs && !m_redirect.isEmpty()) {
 402         /*
 403          * Use saved redirection. We prepend it in front of the user's
 404          * arguments so that the user can override the redirections.
 405         */
 406         strArg = m_redirect + " " + strArg;
 407     }
 408
 409     QString cmdString;
 410     cmdString.sprintf(cmds[cmd].fmt, strArg.latin1());
 411     return cmdString;
 412 }
 413
 414 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg)
 415 {
 416     assert(cmd >= 0 && cmd < NUM_CMDS);
 417     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum);
 418
 419     QString cmdString;
 420     cmdString.sprintf(cmds[cmd].fmt, intArg);
 421     return cmdString;
 422 }
 423
 424 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg, int intArg)
 425 {
 426     assert(cmd >= 0 && cmd < NUM_CMDS);
 427     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum ||
 428            cmds[cmd].argsNeeded == GdbCmdInfo::argNumString ||
 429            cmd == DCexamine ||
 430            cmd == DCtty);
 431
 432     normalizeStringArg(strArg);
 433
 434     QString cmdString;
 435
 436     if (cmd == DCtty)
 437     {
 438         /*
 439          * intArg specifies which channels should be redirected to
 440          * /dev/null. It is a value or'ed together from RDNstdin,
 441          * RDNstdout, RDNstderr. We store the value for a later DCsetargs
 442          * command.
 443          *
 444          * Note: We rely on that after the DCtty a DCsetargs will follow,
 445          * which will ultimately apply the redirection.
 446          */
 447         static const char* const runRedir[8] = {
 448             "",
 449             "</dev/null",
 450             ">/dev/null",
 451             "</dev/null >/dev/null",
 452             "2>/dev/null",
 453             "</dev/null 2>/dev/null",
 454             ">/dev/null 2>&1",
 455             "</dev/null >/dev/null 2>&1"
 456         };
 457         if (strArg.isEmpty())
 458             intArg = 7;                 /* failsafe if no tty */
 459         m_redirect = runRedir[intArg & 7];
 460
 461         return makeCmdString(DCtty, strArg);   /* note: no problem if strArg empty */
 462     }
 463
 464     if (cmd == DCexamine) {
 465         // make a format specifier from the intArg
 466         static const char size[16] = {
 467             '\0', 'b', 'h', 'w', 'g'
 468         };
 469         static const char format[16] = {
 470             '\0', 'x', 'd', 'u', 'o', 't',
 471             'a',  'c', 'f', 's', 'i'
 472         };
 473         assert(MDTsizemask == 0xf);     /* lowest 4 bits */
 474         assert(MDTformatmask == 0xf0);  /* next 4 bits */
 475         int count = 16;                 /* number of entities to print */
 476         char sizeSpec = size[intArg & MDTsizemask];
 477         char formatSpec = format[(intArg & MDTformatmask) >> 4];
 478         assert(sizeSpec != '\0');
 479         assert(formatSpec != '\0');
 480         // adjust count such that 16 lines are printed
 481         switch (intArg & MDTformatmask) {
 482         case MDTstring: case MDTinsn:
 483             break;                      /* no modification needed */
 484         default:
 485             // all cases drop through:
 486             switch (intArg & MDTsizemask) {
 487             case MDTbyte:
 488             case MDThalfword:
 489                 count *= 2;
 490             case MDTword:
 491                 count *= 2;
 492             case MDTgiantword:
 493                 count *= 2;
 494             }
 495             break;
 496         }
 497         QString spec;
 498         spec.sprintf("/%d%c%c", count, sizeSpec, formatSpec);
 499
 500         return makeCmdString(DCexamine, spec, strArg);
 501     }
 502
 503     if (cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum)
 504     {
 505         // line numbers are zero-based
 506         if (cmd == DCuntil || cmd == DCbreakline ||
 507             cmd == DCtbreakline || cmd == DCinfoline)
 508         {
 509             intArg++;
 510         }
 511         if (cmd == DCinfoline)
 512         {
 513             // must split off file name part
 514             int slash = strArg.findRev('/');
 515             if (slash >= 0)
 516                 strArg = strArg.right(strArg.length()-slash-1);
 517         }
 518         cmdString.sprintf(cmds[cmd].fmt, strArg.latin1(), intArg);
 519     }
 520     else
 521     {
 522         cmdString.sprintf(cmds[cmd].fmt, intArg, strArg.latin1());
 523     }
 524     return cmdString;
 525 }
 526
 527 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg1, QString strArg2)
 528 {
 529     assert(cmd >= 0 && cmd < NUM_CMDS);
 530     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString2);
 531
 532     normalizeStringArg(strArg1);
 533     normalizeStringArg(strArg2);
 534
 535     QString cmdString;
 536     cmdString.sprintf(cmds[cmd].fmt, strArg1.latin1(), strArg2.latin1());
 537     return cmdString;
 538 }
 539
 540 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg1, int intArg2)
 541 {
 542     assert(cmd >= 0 && cmd < NUM_CMDS);
 543     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum2);
 544
 545     QString cmdString;
 546     cmdString.sprintf(cmds[cmd].fmt, intArg1, intArg2);
 547     return cmdString;
 548 }
 549
 550 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, bool clearLow)
 551 {
 552     assert(cmd >= 0 && cmd < NUM_CMDS);
 553     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNone);
 554
 555     if (cmd == DCrun) {
 556         m_haveCoreFile = false;
 557     }
 558
 559     return executeCmdString(cmd, cmds[cmd].fmt, clearLow);
 560 }
 561
 562 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg,
 563                                     bool clearLow)
 564 {
 565     return executeCmdString(cmd, makeCmdString(cmd, strArg), clearLow);
 566 }
 567
 568 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg,
 569                                     bool clearLow)
 570 {
 571
 572     return executeCmdString(cmd, makeCmdString(cmd, intArg), clearLow);
 573 }
 574
 575 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg, int intArg,
 576                                     bool clearLow)
 577 {
 578     return executeCmdString(cmd, makeCmdString(cmd, strArg, intArg), clearLow);
 579 }
 580
 581 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 582                                     bool clearLow)
 583 {
 584     return executeCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), clearLow);
 585 }
 586
 587 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg1, int intArg2,
 588                                     bool clearLow)
 589 {
 590     return executeCmdString(cmd, makeCmdString(cmd, intArg1, intArg2), clearLow);
 591 }
 592
 593 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QueueMode mode)
 594 {
 595     return queueCmdString(cmd, cmds[cmd].fmt, mode);
 596 }
 597
 598 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg,
 599                                   QueueMode mode)
 600 {
 601     return queueCmdString(cmd, makeCmdString(cmd, strArg), mode);
 602 }
 603
 604 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, int intArg,
 605                                   QueueMode mode)
 606 {
 607     return queueCmdString(cmd, makeCmdString(cmd, intArg), mode);
 608 }
 609
 610 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg, int intArg,
 611                                   QueueMode mode)
 612 {
 613     return queueCmdString(cmd, makeCmdString(cmd, strArg, intArg), mode);
 614 }
 615
 616 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 617                                   QueueMode mode)
 618 {
 619     return queueCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), mode);
 620 }
 621
 622 void GdbDriver::terminate()
 623 {
 624     kill(SIGTERM);
 625     m_state = DSidle;
 626 }
 627
 628 void GdbDriver::detachAndTerminate()
 629 {
 630     kill(SIGINT);
 631     flushCommands();
 632     executeCmdString(DCinitialize, "detach\nquit\n", true);
 633 }
 634
 635 void GdbDriver::interruptInferior()
 636 {
 637     kill(SIGINT);
 638     // remove accidentally queued commands
 639     flushHiPriQueue();
 640 }
 641
 642 static bool isErrorExpr(const char* output)
 643 {
 644     return
 645         strncmp(output, "Cannot access memory at", 23) == 0 ||
 646         strncmp(output, "Attempt to dereference a generic pointer", 40) == 0 ||
 647         strncmp(output, "Attempt to take contents of ", 28) == 0 ||
 648         strncmp(output, "Attempt to use a type name as an expression", 43) == 0 ||
 649         strncmp(output, "There is no member or method named", 34) == 0 ||
 650         strncmp(output, "A parse error in expression", 27) == 0 ||
 651         strncmp(output, "No symbol \"", 11) == 0 ||
 652         strncmp(output, "Internal error: ", 16) == 0;
 653 }
 654
 655 /**
 656  * Returns true if the output is an error message. If wantErrorValue is
 657  * true, a new ExprValue object is created and filled with the error message.
 658  * If there are warnings, they are skipped and output points past the warnings
 659  * on return (even if there \e are errors).
 660  */
 661 static bool parseErrorMessage(const char*& output,
 662                               ExprValue*& variable, bool wantErrorValue)
 663 {
 664     // skip warnings
 665     while (strncmp(output, "warning:", 8) == 0)
 666     {
 667         char* end = strchr(output+8, '\n');
 668         if (end == 0)
 669             output += strlen(output);
 670         else
 671             output = end+1;
 672     }
 673
 674     if (isErrorExpr(output))
 675     {
 676         if (wantErrorValue) {
 677             // put the error message as value in the variable
 678             variable = new ExprValue(QString(), VarTree::NKplain);
 679             const char* endMsg = strchr(output, '\n');
 680             if (endMsg == 0)
 681                 endMsg = output + strlen(output);
 682             variable->m_value = QString::fromLatin1(output, endMsg-output);
 683         } else {
 684             variable = 0;
 685         }
 686         return true;
 687     }
 688     return false;
 689 }
 690
 691 #if QT_VERSION >= 300
 692 union Qt2QChar {
 693     short s;
 694     struct {
 695         uchar row;
 696         uchar cell;
 697     } qch;
 698 };
 699 #endif
 700
 701 void GdbDriver::setPrintQStringDataCmd(const char* cmd)
 702 {
 703     // don't accept the command if it is empty
 704     if (cmd == 0 || *cmd == '\0')
 705         return;
 706     assert(strlen(cmd) <= MAX_FMTLEN);
 707     cmds[DCprintQStringStruct].fmt = cmd;
 708 }
 709
 710 ExprValue* GdbDriver::parseQCharArray(const char* output, bool wantErrorValue, bool qt3like)
 711 {
 712     ExprValue* variable = 0;
 713
 714     /*
 715      * Parse off white space. gdb sometimes prints white space first if the
 716      * printed array leaded to an error.
 717      */
 718     while (isspace(*output))
 719         output++;
 720
 721     // special case: empty string (0 repetitions)
 722     if (strncmp(output, "Invalid number 0 of repetitions", 31) == 0)
 723     {
 724         variable = new ExprValue(QString(), VarTree::NKplain);
 725         variable->m_value = "\"\"";
 726         return variable;
 727     }
 728
 729     // check for error conditions
 730     if (parseErrorMessage(output, variable, wantErrorValue))
 731         return variable;
 732
 733     // parse the array
 734
 735     // find '='
 736     const char* p = output;
 737     p = strchr(p, '=');
 738     if (p == 0) {
 739         goto error;
 740     }
 741     // skip white space
 742     do {
 743         p++;
 744     } while (isspace(*p));
 745
 746     if (*p == '{')
 747     {
 748         // this is the real data
 749         p++;                            /* skip '{' */
 750
 751         // parse the array
 752         QString result;
 753         QString repeatCount;
 754         enum { wasNothing, wasChar, wasRepeat } lastThing = wasNothing;
 755         /*
 756          * A matrix for separators between the individual "things"
 757          * that are added to the string. The first index is a bool,
 758          * the second index is from the enum above.
 759          */
 760         static const char* separator[2][3] = {
 761             { "\"", 0,       ", \"" },  /* normal char is added */
 762             { "'",  "\", '", ", '" }    /* repeated char is added */
 763         };
 764
 765         while (isdigit(*p)) {
 766             // parse a number
 767             char* end;
 768             unsigned short value = (unsigned short) strtoul(p, &end, 0);
 769             if (end == p)
 770                 goto error;             /* huh? no valid digits */
 771             // skip separator and search for a repeat count
 772             p = end;
 773             while (isspace(*p) || *p == ',')
 774                 p++;
 775             bool repeats = strncmp(p, "<repeats ", 9) == 0;
 776             if (repeats) {
 777                 const char* start = p;
 778                 p = strchr(p+9, '>');   /* search end and advance */
 779                 if (p == 0)
 780                     goto error;
 781                 p++;                    /* skip '>' */
 782                 repeatCount = QString::fromLatin1(start, p-start);
 783                 while (isspace(*p) || *p == ',')
 784                     p++;
 785             }
 786             // p is now at the next char (or the end)
 787
 788             // interpret the value as a QChar
 789             // TODO: make cross-architecture compatible
 790             QChar ch;
 791             if (qt3like) {
 792                 ch = QChar(value);
 793             } else {
 794 #if QT_VERSION < 300
 795                 (unsigned short&)ch = value;
 796 #else
 797                 Qt2QChar c;
 798                 c.s = value;
 799                 ch.setRow(c.qch.row);
 800                 ch.setCell(c.qch.cell);
 801 #endif
 802             }
 803
 804             // escape a few frequently used characters
 805             char escapeCode = '\0';
 806             switch (ch.latin1()) {
 807             case '\n': escapeCode = 'n'; break;
 808             case '\r': escapeCode = 'r'; break;
 809             case '\t': escapeCode = 't'; break;
 810             case '\b': escapeCode = 'b'; break;
 811             case '\"': escapeCode = '\"'; break;
 812             case '\\': escapeCode = '\\'; break;
 813             case '\0': if (value == 0) { escapeCode = '0'; } break;
 814             }
 815
 816             // add separator
 817             result += separator[repeats][lastThing];
 818             // add char
 819             if (escapeCode != '\0') {
 820                 result += '\\';
 821                 ch = escapeCode;
 822             }
 823             result += ch;
 824
 825             // fixup repeat count and lastThing
 826             if (repeats) {
 827                 result += "' ";
 828                 result += repeatCount;
 829                 lastThing = wasRepeat;
 830             } else {
 831                 lastThing = wasChar;
 832             }
 833         }
 834         if (*p != '}')
 835             goto error;
 836
 837         // closing quote
 838         if (lastThing == wasChar)
 839             result += "\"";
 840
 841         // assign the value
 842         variable = new ExprValue(QString(), VarTree::NKplain);
 843         variable->m_value = result;
 844     }
 845     else if (strncmp(p, "true", 4) == 0)
 846     {
 847         variable = new ExprValue(QString(), VarTree::NKplain);
 848         variable->m_value = "QString::null";
 849     }
 850     else if (strncmp(p, "false", 5) == 0)
 851     {
 852         variable = new ExprValue(QString(), VarTree::NKplain);
 853         variable->m_value = "(null)";
 854     }
 855     else
 856         goto error;
 857     return variable;
 858
 859 error:
 860     if (wantErrorValue) {
 861         variable = new ExprValue(QString(), VarTree::NKplain);
 862         variable->m_value = "internal parse error";
 863     }
 864     return variable;
 865 }
 866
 867 static ExprValue* parseVar(const char*& s)
 868 {
 869     const char* p = s;
 870
 871     // skip whitespace
 872     while (isspace(*p))
 873         p++;
 874
 875     QString name;
 876     VarTree::NameKind kind;
 877     /*
 878      * Detect anonymouse struct values: The 'name =' part is missing:
 879      *    s = { a = 1, { b = 2 }}
 880      * Note that this detection works only inside structs when the anonymous
 881      * struct is not the first member:
 882      *    s = {{ a = 1 }, b = 2}
 883      * This is misparsed (by parseNested()) because it is mistakenly
 884      * interprets the second opening brace as the first element of an array
 885      * of structs.
 886      */
 887     if (*p == '{')
 888     {
 889         name = i18n("<anonymous struct or union>");
 890         kind = VarTree::NKanonymous;
 891     }
 892     else
 893     {
 894         if (!parseName(p, name, kind)) {
 895             return 0;
 896         }
 897
 898         // go for '='
 899         while (isspace(*p))
 900             p++;
 901         if (*p != '=') {
 902             TRACE(QString().sprintf("parse error: = not found after %s", (const char*)name));
 903             return 0;
 904         }
 905         // skip the '=' and more whitespace
 906         p++;
 907         while (isspace(*p))
 908             p++;
 909     }
 910
 911     ExprValue* variable = new ExprValue(name, kind);
 912
 913     if (!parseValue(p, variable)) {
 914         delete variable;
 915         return 0;
 916     }
 917     s = p;
 918     return variable;
 919 }
 920
 921 static void skipNested(const char*& s, char opening, char closing)
 922 {
 923     const char* p = s;
 924
 925     // parse a nested type
 926     int nest = 1;
 927     p++;
 928     /*
 929      * Search for next matching `closing' char, skipping nested pairs of
 930      * `opening' and `closing'.
 931      */
 932     while (*p && nest > 0) {
 933         if (*p == opening) {
 934             nest++;
 935         } else if (*p == closing) {
 936             nest--;
 937         }
 938         p++;
 939     }
 940     if (nest != 0) {
 941         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
 942     }
 943     s = p;
 944 }
 945
 946 /**
 947  * This function skips text that is delimited by nested angle bracktes, '<>'.
 948  * A complication arises because the delimited text can contain the names of
 949  * operator<<, operator>>, operator<, and operator>, which have to be treated
 950  * specially so that they do not count towards the nesting of '<>'.
 951  * This function assumes that the delimited text does not contain strings.
 952  */
 953 static void skipNestedAngles(const char*& s)
 954 {
 955     const char* p = s;
 956
 957     int nest = 1;
 958     p++;                // skip the initial '<'
 959     while (*p && nest > 0)
 960     {
 961         // Below we can check for p-s >= 9 instead of 8 because
 962         // *s is '<' and cannot be part of "operator".
 963         if (*p == '<')
 964         {
 965             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 966                 if (p[1] == '<')
 967                     p++;
 968             } else {
 969                 nest++;
 970             }
 971         }
 972         else if (*p == '>')
 973         {
 974             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 975                 if (p[1] == '>')
 976                     p++;
 977             } else {
 978                 nest--;
 979             }
 980         }
 981         p++;
 982     }
 983     if (nest != 0) {
 984         TRACE(QString().sprintf("parse error: mismatching <> at %-20.20s", s));
 985     }
 986     s = p;
 987 }
 988
 989 /**
 990  * Find the end of line that is not inside braces
 991  */
 992 static void findEnd(const char*& s)
 993 {
 994     const char* p = s;
 995     while (*p && *p!='\n') {
 996         while (*p && *p!='\n' && *p!='{')
 997             p++;
 998         if (*p=='{') {
 999             p++;
1000             skipNested(p, '{', '}'); p--;
1001         }
1002     }
1003     s = p;
1004 }
1005
1006 static bool isNumberish(const char ch)
1007 {
1008     return (ch>='0' && ch<='9') || ch=='.' || ch=='x';
1009 }
1010
1011 void skipString(const char*& p)
1012 {
1013 moreStrings:
1014     // opening quote
1015     char quote = *p++;
1016     while (*p != quote) {
1017         if (*p == '\\') {
1018             // skip escaped character
1019             // no special treatment for octal values necessary
1020             p++;
1021         }
1022         // simply return if no more characters
1023         if (*p == '\0')
1024             return;
1025         p++;
1026     }
1027     // closing quote
1028     p++;
1029     /*
1030      * Strings can consist of several parts, some of which contain repeated
1031      * characters.
1032      */
1033     if (quote == '\'') {
1034         // look ahaead for <repeats 123 times>
1035         const char* q = p+1;
1036         while (isspace(*q))
1037             q++;
1038         if (strncmp(q, "<repeats ", 9) == 0) {
1039             p = q+9;
1040             while (*p != '\0' && *p != '>')
1041                 p++;
1042             if (*p != '\0') {
1043                 p++;                    /* skip the '>' */
1044             }
1045         }
1046     }
1047     // is the string continued?
1048     if (*p == ',') {
1049         // look ahead for another quote
1050         const char* q = p+1;
1051         while (isspace(*q))
1052             q++;
1053         if (*q == '"' || *q == '\'') {
1054             // yes!
1055             p = q;
1056             goto moreStrings;
1057         }
1058     }
1059     /* very long strings are followed by `...' */
1060     if (*p == '.' && p[1] == '.' && p[2] == '.') {
1061         p += 3;
1062     }
1063 }
1064
1065 static void skipNestedWithString(const char*& s, char opening, char closing)
1066 {
1067     const char* p = s;
1068
1069     // parse a nested expression
1070     int nest = 1;
1071     p++;
1072     /*
1073      * Search for next matching `closing' char, skipping nested pairs of
1074      * `opening' and `closing' as well as strings.
1075      */
1076     while (*p && nest > 0) {
1077         if (*p == opening) {
1078             nest++;
1079         } else if (*p == closing) {
1080             nest--;
1081         } else if (*p == '\'' || *p == '\"') {
1082             skipString(p);
1083             continue;
1084         }
1085         p++;
1086     }
1087     if (nest > 0) {
1088         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
1089     }
1090     s = p;
1091 }
1092
1093 inline void skipName(const char*& p)
1094 {
1095     // allow : (for enumeration values) and $ and . (for _vtbl.)
1096     while (isalnum(*p) || *p == '_' || *p == ':' || *p == '$' || *p == '.')
1097         p++;
1098 }
1099
1100 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind)
1101 {
1102     kind = VarTree::NKplain;
1103
1104     const char* p = s;
1105     // examples of names:
1106     //  name
1107     //  <Object>
1108     //  <string<a,b<c>,7> >
1109
1110     if (*p == '<') {
1111         skipNestedAngles(p);
1112         name = QString::fromLatin1(s, p - s);
1113         kind = VarTree::NKtype;
1114     }
1115     else
1116     {
1117         // name, which might be "static"; allow dot for "_vtbl."
1118         skipName(p);
1119         if (p == s) {
1120             TRACE(QString().sprintf("parse error: not a name %-20.20s", s));
1121             return false;
1122         }
1123         int len = p - s;
1124         if (len == 6 && strncmp(s, "static", 6) == 0) {
1125             kind = VarTree::NKstatic;
1126
1127             // its a static variable, name comes now
1128             while (isspace(*p))
1129                 p++;
1130             s = p;
1131             skipName(p);
1132             if (p == s) {
1133                 TRACE(QString().sprintf("parse error: not a name after static %-20.20s", s));
1134                 return false;
1135             }
1136             len = p - s;
1137         }
1138         name = QString::fromLatin1(s, len);
1139     }
1140     // return the new position
1141     s = p;
1142     return true;
1143 }
1144
1145 static bool parseValue(const char*& s, ExprValue* variable)
1146 {
1147     variable->m_value = "";
1148
1149 repeat:
1150     if (*s == '{') {
1151         // Sometimes we find the following output:
1152         //  {<text variable, no debug info>} 0x40012000 <access>
1153         //  {<data variable, no debug info>}
1154         //  {<variable (not text or data), no debug info>}
1155         if (strncmp(s, "{<text variable, ", 17) == 0 ||
1156             strncmp(s, "{<data variable, ", 17) == 0 ||
1157             strncmp(s, "{<variable (not text or data), ", 31) == 0)
1158         {
1159             const char* start = s;
1160             skipNested(s, '{', '}');
1161             variable->m_value = QString::fromLatin1(start, s-start);
1162             variable->m_value += ' ';   // add only a single space
1163             while (isspace(*s))
1164                 s++;
1165             goto repeat;
1166         }
1167         else
1168         {
1169             s++;
1170             if (!parseNested(s, variable)) {
1171                 return false;
1172             }
1173             // must be the closing brace
1174             if (*s != '}') {
1175                 TRACE("parse error: missing } of " +  variable->m_name);
1176                 return false;
1177             }
1178             s++;
1179             // final white space
1180             while (isspace(*s))
1181                 s++;
1182         }
1183     } else {
1184         // examples of leaf values (cannot be the empty string):
1185         //  123
1186         //  -123
1187         //  23.575e+37
1188         //  0x32a45
1189         //  @0x012ab4
1190         //  (DwContentType&) @0x8123456: {...}
1191         //  0x32a45 "text"
1192         //  10 '\n'
1193         //  <optimized out>
1194         //  0x823abc <Array<int> virtual table>
1195         //  (void (*)()) 0x8048480 <f(E *, char)>
1196         //  (E *) 0xbffff450
1197         //  red
1198         //  &parseP (HTMLClueV *, char *)
1199         //  Variable "x" is not available.
1200         //  The value of variable 'x' is distributed...
1201         //  -nan(0xfffff081defa0)
1202
1203         const char*p = s;
1204
1205         // check for type
1206         QString type;
1207         if (*p == '(') {
1208             skipNested(p, '(', ')');
1209
1210             while (isspace(*p))
1211                 p++;
1212             variable->m_value = QString::fromLatin1(s, p - s);
1213         }
1214
1215         bool reference = false;
1216         if (*p == '@') {
1217             // skip reference marker
1218             p++;
1219             reference = true;
1220         }
1221         const char* start = p;
1222         if (*p == '-')
1223             p++;
1224
1225         // some values consist of more than one token
1226         bool checkMultiPart = false;
1227
1228         if (p[0] == '0' && p[1] == 'x') {
1229             // parse hex number
1230             p += 2;
1231             while (isxdigit(*p))
1232                 p++;
1233
1234             /*
1235              * Assume this is a pointer, but only if it's not a reference, since
1236              * references can't be expanded.
1237              */
1238             if (!reference) {
1239                 variable->m_varKind = VarTree::VKpointer;
1240             } else {
1241                 /*
1242                  * References are followed by a colon, in which case we'll
1243                  * find the value following the reference address.
1244                  */
1245                 if (*p == ':') {
1246                     p++;
1247                 } else {
1248                     // Paranoia. (Can this happen, i.e. reference not followed by ':'?)
1249                     reference = false;
1250                 }
1251             }
1252             checkMultiPart = true;
1253         } else if (isdigit(*p)) {
1254             // parse decimal number, possibly a float
1255             while (isdigit(*p))
1256                 p++;
1257             if (*p == '.') {            /* TODO: obey i18n? */
1258                 // In long arrays an integer may be followed by '...'.
1259                 // We test for this situation and don't gobble the '...'.
1260                 if (p[1] != '.' || p[0] != '.') {
1261                     // fractional part
1262                     p++;
1263                     while (isdigit(*p))
1264                         p++;
1265                 }
1266             }
1267             if (*p == 'e' || *p == 'E') {
1268                 p++;
1269                 // exponent
1270                 if (*p == '-' || *p == '+')
1271                     p++;
1272                 while (isdigit(*p))
1273                     p++;
1274             }
1275
1276             // for char variables there is the char, eg. 10 '\n'
1277             checkMultiPart = true;
1278         } else if (*p == '<') {
1279             // e.g. <optimized out>
1280             skipNestedAngles(p);
1281         } else if (*p == '"' || *p == '\'') {
1282             // character may have multipart: '\000' <repeats 11 times>
1283             checkMultiPart = *p == '\'';
1284             // found a string
1285             skipString(p);
1286         } else if (*p == '&') {
1287             // function pointer
1288             p++;
1289             skipName(p);
1290             while (isspace(*p)) {
1291                 p++;
1292             }
1293             if (*p == '(') {
1294                 skipNested(p, '(', ')');
1295             }
1296         } else if (strncmp(p, "Variable \"", 10) == 0) {
1297             // Variable "x" is not available.
1298             p += 10;            // skip to "
1299             skipName(p);
1300             if (strncmp(p, "\" is not available.", 19) == 0) {
1301                 p += 19;
1302             }
1303         } else if (strncmp(p, "The value of variable '", 23) == 0) {
1304             p += 23;
1305             skipName(p);
1306             const char* e = strchr(p, '.');
1307             if (e == 0) {
1308                 p += strlen(p);
1309             } else {
1310                 p = e+1;
1311             }
1312         } else {
1313             // must be an enumeration value
1314             skipName(p);
1315             // hmm, not necessarily: nan (floating point Not a Number)
1316             // is followed by a number in ()
1317             if (*p == '(')
1318                 skipNested(p, '(', ')');
1319         }
1320         variable->m_value += QString::fromLatin1(start, p - start);
1321
1322         // remove line breaks from the value; this is ok since
1323         // string values never contain a literal line break
1324         variable->m_value.replace('\n', ' ');
1325
1326         if (checkMultiPart) {
1327             // white space
1328             while (isspace(*p))
1329                 p++;
1330             // may be followed by a string or <...>
1331             start = p;
1332
1333             if (*p == '"' || *p == '\'') {
1334                 skipString(p);
1335             } else if (*p == '<') {
1336                 // if this value is part of an array, it might be followed
1337                 // by <repeats 15 times>, which we don't skip here
1338                 if (strncmp(p, "<repeats ", 9) != 0)
1339                     skipNestedAngles(p);
1340             }
1341             if (p != start) {
1342                 // there is always a blank before the string,
1343                 // which we will include in the final string value
1344                 variable->m_value += QString::fromLatin1(start-1, (p - start)+1);
1345                 // if this was a pointer, reset that flag since we
1346                 // now got the value
1347                 variable->m_varKind = VarTree::VKsimple;
1348             }
1349         }
1350
1351         if (variable->m_value.length() == 0) {
1352             TRACE("parse error: no value for " + variable->m_name);
1353             return false;
1354         }
1355
1356         // final white space
1357         while (isspace(*p))
1358             p++;
1359         s = p;
1360
1361         /*
1362          * If this was a reference, the value follows. It might even be a
1363          * composite variable!
1364          */
1365         if (reference) {
1366             goto repeat;
1367         }
1368     }
1369
1370     return true;
1371 }
1372
1373 static bool parseNested(const char*& s, ExprValue* variable)
1374 {
1375     // could be a structure or an array
1376     while (isspace(*s))
1377         s++;
1378
1379     const char* p = s;
1380     bool isStruct = false;
1381     /*
1382      * If there is a name followed by an = or an < -- which starts a type
1383      * name -- or "static", it is a structure
1384      */
1385     if (*p == '<' || *p == '}') {
1386         isStruct = true;
1387     } else if (strncmp(p, "static ", 7) == 0) {
1388         isStruct = true;
1389     } else if (isalpha(*p) || *p == '_' || *p == '$') {
1390         // look ahead for a comma after the name
1391         skipName(p);
1392         while (isspace(*p))
1393             p++;
1394         if (*p == '=') {
1395             isStruct = true;
1396         }
1397         p = s;                          /* rescan the name */
1398     }
1399     if (isStruct) {
1400         if (!parseVarSeq(p, variable)) {
1401             return false;
1402         }
1403         variable->m_varKind = VarTree::VKstruct;
1404     } else {
1405         if (!parseValueSeq(p, variable)) {
1406             return false;
1407         }
1408         variable->m_varKind = VarTree::VKarray;
1409     }
1410     s = p;
1411     return true;
1412 }
1413
1414 static bool parseVarSeq(const char*& s, ExprValue* variable)
1415 {
1416     // parse a comma-separated sequence of variables
1417     ExprValue* var = variable;          /* var != 0 to indicate success if empty seq */
1418     for (;;) {
1419         if (*s == '}')
1420             break;
1421         if (strncmp(s, "<No data fields>}", 17) == 0)
1422         {
1423             // no member variables, so break out immediately
1424             s += 16;                    /* go to the closing brace */
1425             break;
1426         }
1427         var = parseVar(s);
1428         if (var == 0)
1429             break;                      /* syntax error */
1430         variable->appendChild(var);
1431         if (*s != ',')
1432             break;
1433         // skip the comma and whitespace
1434         s++;
1435         while (isspace(*s))
1436             s++;
1437     }
1438     return var != 0;
1439 }
1440
1441 static bool parseValueSeq(const char*& s, ExprValue* variable)
1442 {
1443     // parse a comma-separated sequence of variables
1444     int index = 0;
1445     bool good;
1446     for (;;) {
1447         QString name;
1448         name.sprintf("[%d]", index);
1449         ExprValue* var = new ExprValue(name, VarTree::NKplain);
1450         good = parseValue(s, var);
1451         if (!good) {
1452             delete var;
1453             return false;
1454         }
1455         // a value may be followed by "<repeats 45 times>"
1456         if (strncmp(s, "<repeats ", 9) == 0) {
1457             s += 9;
1458             char* end;
1459             int l = strtol(s, &end, 10);
1460             if (end == s || strncmp(end, " times>", 7) != 0) {
1461                 // should not happen
1462                 delete var;
1463                 return false;
1464             }
1465             TRACE(QString().sprintf("found <repeats %d times> in array", l));
1466             // replace name and advance index
1467             name.sprintf("[%d .. %d]", index, index+l-1);
1468             var->m_name = name;
1469             index += l;
1470             // skip " times>" and space
1471             s = end+7;
1472             // possible final space
1473             while (isspace(*s))
1474                 s++;
1475         } else {
1476             index++;
1477         }
1478         variable->appendChild(var);
1479         // long arrays may be terminated by '...'
1480         if (strncmp(s, "...", 3) == 0) {
1481             s += 3;
1482             ExprValue* var = new ExprValue("...", VarTree::NKplain);
1483             var->m_value = i18n("<additional entries of the array suppressed>");
1484             variable->appendChild(var);
1485             break;
1486         }
1487         if (*s != ',') {
1488             break;
1489         }
1490         // skip the comma and whitespace
1491         s++;
1492         while (isspace(*s))
1493             s++;
1494         // sometimes there is a closing brace after a comma
1495 //      if (*s == '}')
1496 //          break;
1497     }
1498     return true;
1499 }
1500
1501 /**
1502  * Parses a stack frame.
1503  */
1504 static void parseFrameInfo(const char*& s, QString& func,
1505                            QString& file, int& lineNo, DbgAddr& address)
1506 {
1507     const char* p = s;
1508
1509     // next may be a hexadecimal address
1510     if (*p == '0') {
1511         const char* start = p;
1512         p++;
1513         if (*p == 'x')
1514             p++;
1515         while (isxdigit(*p))
1516             p++;
1517         address = QString::fromLatin1(start, p-start);
1518         if (strncmp(p, " in ", 4) == 0)
1519             p += 4;
1520     } else {
1521         address = DbgAddr();
1522     }
1523     const char* start = p;
1524     // check for special signal handler frame
1525     if (strncmp(p, "<signal handler called>", 23) == 0) {
1526         func = QString::fromLatin1(start, 23);
1527         file = QString();
1528         lineNo = -1;
1529         s = p+23;
1530         if (*s == '\n')
1531             s++;
1532         return;
1533     }
1534
1535     /*
1536      * Skip the function name. It is terminated by a left parenthesis
1537      * which does not delimit "(anonymous namespace)" and which is
1538      * outside the angle brackets <> of template parameter lists
1539      * and is preceded by a space.
1540      */
1541     while (*p != '\0')
1542     {
1543         if (*p == '<') {
1544             // check for operator<< and operator<
1545             if (p-start >= 8 && strncmp(p-8, "operator", 8) == 0)
1546             {
1547                 p++;
1548                 if (*p == '<')
1549                     p++;
1550             }
1551             else
1552             {
1553                 // skip template parameter list
1554                 skipNestedAngles(p);
1555             }
1556         } else if (*p == '(') {
1557             // this skips "(anonymous namespace)" as well as the formal
1558             // parameter list of the containing function if this is a member
1559             // of a nested class
1560             skipNestedWithString(p, '(', ')');
1561         } else if (*p == ' ') {
1562             ++p;
1563             if (*p == '(')
1564                 break; // parameter list found
1565         } else {
1566             p++;
1567         }
1568     }
1569
1570     if (*p == '\0') {
1571         func = start;
1572         file = QString();
1573         lineNo = -1;
1574         s = p;
1575         return;
1576     }
1577     /*
1578      * Skip parameters. But notice that for complicated conversion
1579      * functions (eg. "operator int(**)()()", ie. convert to pointer to
1580      * pointer to function) as well as operator()(...) we have to skip
1581      * additional pairs of parentheses. Furthermore, recent gdbs write the
1582      * demangled name followed by the arguments in a pair of parentheses,
1583      * where the demangled name can end in "const".
1584      */
1585     do {
1586         skipNestedWithString(p, '(', ')');
1587         while (isspace(*p))
1588             p++;
1589         // skip "const"
1590         if (strncmp(p, "const", 5) == 0) {
1591             p += 5;
1592             while (isspace(*p))
1593                 p++;
1594         }
1595     } while (*p == '(');
1596
1597     // check for file position
1598     if (strncmp(p, "at ", 3) == 0) {
1599         p += 3;
1600         const char* fileStart = p;
1601         // go for the end of the line
1602         while (*p != '\0' && *p != '\n')
1603             p++;
1604         // search back for colon
1605         const char* colon = p;
1606         do {
1607             --colon;
1608         } while (*colon != ':');
1609         file = QString::fromLatin1(fileStart, colon-fileStart);
1610         lineNo = atoi(colon+1)-1;
1611         // skip new-line
1612         if (*p != '\0')
1613             p++;
1614     } else {
1615         // check for "from shared lib"
1616         if (strncmp(p, "from ", 5) == 0) {
1617             p += 5;
1618             // go for the end of the line
1619             while (*p != '\0' && *p != '\n')
1620                 p++;
1621             // skip new-line
1622             if (*p != '\0')
1623                 p++;
1624         }
1625         file = "";
1626         lineNo = -1;
1627     }
1628     // construct the function name (including file info)
1629     if (*p == '\0') {
1630         func = start;
1631     } else {
1632         func = QString::fromLatin1(start, p-start-1);   /* don't include \n */
1633     }
1634     s = p;
1635
1636     /*
1637      * Replace \n (and whitespace around it) in func by a blank. We cannot
1638      * use QString::simplifyWhiteSpace() for this because this would also
1639      * simplify space that belongs to a string arguments that gdb sometimes
1640      * prints in the argument lists of the function.
1641      */
1642     ASSERT(!isspace(func[0].latin1()));         /* there must be non-white before first \n */
1643     int nl = 0;
1644     while ((nl = func.find('\n', nl)) >= 0) {
1645         // search back to the beginning of the whitespace
1646         int startWhite = nl;
1647         do {
1648             --startWhite;
1649         } while (isspace(func[startWhite].latin1()));
1650         startWhite++;
1651         // search forward to the end of the whitespace
1652         do {
1653             nl++;
1654         } while (isspace(func[nl].latin1()));
1655         // replace
1656         func.replace(startWhite, nl-startWhite, " ");
1657         /* continue searching for more \n's at this place: */
1658         nl = startWhite+1;
1659     }
1660 }
1661
1662
1663 /**
1664  * Parses a stack frame including its frame number
1665  */
1666 static bool parseFrame(const char*& s, int& frameNo, QString& func,
1667                        QString& file, int& lineNo, DbgAddr& address)
1668 {
1669     // Example:
1670     //  #1  0x8048881 in Dl::Dl (this=0xbffff418, r=3214) at testfile.cpp:72
1671     //  Breakpoint 3, Cl::f(int) const (this=0xbffff3c0, x=17) at testfile.cpp:155
1672
1673     // must start with a hash mark followed by number
1674     // or with "Breakpoint " followed by number and comma
1675     if (s[0] == '#') {
1676         if (!isdigit(s[1]))
1677             return false;
1678         s++;                            /* skip the hash mark */
1679     } else if (strncmp(s, "Breakpoint ", 11) == 0) {
1680         if (!isdigit(s[11]))
1681             return false;
1682         s += 11;                        /* skip "Breakpoint" */
1683     } else
1684         return false;
1685
1686     // frame number
1687     frameNo = atoi(s);
1688     while (isdigit(*s))
1689         s++;
1690     // space and comma
1691     while (isspace(*s) || *s == ',')
1692         s++;
1693     parseFrameInfo(s, func, file, lineNo, address);
1694     return true;
1695 }
1696
1697 void GdbDriver::parseBackTrace(const char* output, QList<StackFrame>& stack)
1698 {
1699     QString func, file;
1700     int lineNo, frameNo;
1701     DbgAddr address;
1702
1703     while (::parseFrame(output, frameNo, func, file, lineNo, address)) {
1704         StackFrame* frm = new StackFrame;
1705         frm->frameNo = frameNo;
1706         frm->fileName = file;
1707         frm->lineNo = lineNo;
1708         frm->address = address;
1709         frm->var = new ExprValue(func, VarTree::NKplain);
1710         stack.append(frm);
1711     }
1712 }
1713
1714 bool GdbDriver::parseFrameChange(const char* output, int& frameNo,
1715                                  QString& file, int& lineNo, DbgAddr& address)
1716 {
1717     QString func;
1718     return ::parseFrame(output, frameNo, func, file, lineNo, address);
1719 }
1720
1721
1722 bool GdbDriver::parseBreakList(const char* output, QList<Breakpoint>& brks)
1723 {
1724     // skip first line, which is the headline
1725     const char* p = strchr(output, '\n');
1726     if (p == 0)
1727         return false;
1728     p++;
1729     if (*p == '\0')
1730         return false;
1731
1732     // split up a line
1733     QString location;
1734     QString address;
1735     int hits = 0;
1736     uint ignoreCount = 0;
1737     QString condition;
1738     const char* end;
1739     char* dummy;
1740     while (*p != '\0') {
1741         // get Num
1742         long bpNum = strtol(p, &dummy, 10);     /* don't care about overflows */
1743         p = dummy;
1744         // get Type
1745         while (isspace(*p))
1746             p++;
1747         Breakpoint::Type bpType = Breakpoint::breakpoint;
1748         if (strncmp(p, "breakpoint", 10) == 0) {
1749             p += 10;
1750         } else if (strncmp(p, "hw watchpoint", 13) == 0) {
1751             bpType = Breakpoint::watchpoint;
1752             p += 13;
1753         } else if (strncmp(p, "watchpoint", 10) == 0) {
1754             bpType = Breakpoint::watchpoint;
1755             p += 10;
1756         }
1757         while (isspace(*p))
1758             p++;
1759         if (*p == '\0')
1760             break;
1761         // get Disp
1762         char disp = *p++;
1763         while (*p != '\0' && !isspace(*p))      /* "keep" or "del" */
1764             p++;
1765         while (isspace(*p))
1766             p++;
1767         if (*p == '\0')
1768             break;
1769         // get Enb
1770         char enable = *p++;
1771         while (*p != '\0' && !isspace(*p))      /* "y" or "n" */
1772             p++;
1773         while (isspace(*p))
1774             p++;
1775         if (*p == '\0')
1776             break;
1777         // the address, if present
1778         if (bpType == Breakpoint::breakpoint &&
1779             strncmp(p, "0x", 2) == 0)
1780         {
1781             const char* start = p;
1782             while (*p != '\0' && !isspace(*p))
1783                 p++;
1784             address = QString::fromLatin1(start, p-start);
1785             while (isspace(*p) && *p != '\n')
1786                 p++;
1787             if (*p == '\0')
1788                 break;
1789         } else {
1790             address = QString();
1791         }
1792         // remainder is location, hit and ignore count, condition
1793         hits = 0;
1794         ignoreCount = 0;
1795         condition = QString();
1796         end = strchr(p, '\n');
1797         if (end == 0) {
1798             location = p;
1799             p += location.length();
1800         } else {
1801             location = QString::fromLatin1(p, end-p).stripWhiteSpace();
1802             p = end+1;                  /* skip over \n */
1803         }
1804
1805         // may be continued in next line
1806         while (isspace(*p)) {   /* p points to beginning of line */
1807             // skip white space at beginning of line
1808             while (isspace(*p))
1809                 p++;
1810
1811             // seek end of line
1812             end = strchr(p, '\n');
1813             if (end == 0)
1814                 end = p+strlen(p);
1815
1816             if (strncmp(p, "breakpoint already hit", 22) == 0) {
1817                 // extract the hit count
1818                 p += 22;
1819                 hits = strtol(p, &dummy, 10);
1820                 TRACE(QString().sprintf("hit count %d", hits));
1821             } else if (strncmp(p, "stop only if ", 13) == 0) {
1822                 // extract condition
1823                 p += 13;
1824                 condition = QString::fromLatin1(p, end-p).stripWhiteSpace();
1825                 TRACE("condition: "+condition);
1826             } else if (strncmp(p, "ignore next ", 12) == 0) {
1827                 // extract ignore count
1828                 p += 12;
1829                 ignoreCount = strtol(p, &dummy, 10);
1830                 TRACE(QString().sprintf("ignore count %d", ignoreCount));
1831             } else {
1832                 // indeed a continuation
1833                 location += " " + QString::fromLatin1(p, end-p).stripWhiteSpace();
1834             }
1835             p = end;
1836             if (*p != '\0')
1837                 p++;                    /* skip '\n' */
1838         }
1839         Breakpoint* bp = new Breakpoint;
1840         bp->id = bpNum;
1841         bp->type = bpType;
1842         bp->temporary = disp == 'd';
1843         bp->enabled = enable == 'y';
1844         bp->location = location;
1845         bp->address = address;
1846         bp->hitCount = hits;
1847         bp->ignoreCount = ignoreCount;
1848         bp->condition = condition;
1849         brks.append(bp);
1850     }
1851     return true;
1852 }
1853
1854 bool GdbDriver::parseThreadList(const char* output, QList<ThreadInfo>& threads)
1855 {
1856     if (strcmp(output, "\n") == 0 || strncmp(output, "No stack.", 9) == 0) {
1857         // no threads
1858         return true;
1859     }
1860
1861     int id;
1862     QString systag;
1863     QString func, file;
1864     int lineNo;
1865     DbgAddr address;
1866
1867     const char* p = output;
1868     while (*p != '\0') {
1869         // seach look for thread id, watching out for  the focus indicator
1870         bool hasFocus = false;
1871         while (isspace(*p))             /* may be \n from prev line: see "No stack" below */
1872             p++;
1873         if (*p == '*') {
1874             hasFocus = true;
1875             p++;
1876             // there follows only whitespace
1877         }
1878         char* end;
1879         id = strtol(p, &end, 10);
1880         if (p == end) {
1881             // syntax error: no number found; bail out
1882             return true;
1883         }
1884         p = end;
1885
1886         // skip space
1887         while (isspace(*p))
1888             p++;
1889
1890         /*
1891          * Now follows the thread's SYSTAG. It is terminated by two blanks.
1892          */
1893         end = strstr(p, "  ");
1894         if (end == 0) {
1895             // syntax error; bail out
1896             return true;
1897         }
1898         systag = QString::fromLatin1(p, end-p);
1899         p = end+2;
1900
1901         /*
1902          * Now follows a standard stack frame. Sometimes, however, gdb
1903          * catches a thread at an instant where it doesn't have a stack.
1904          */
1905         if (strncmp(p, "[No stack.]", 11) != 0) {
1906             ::parseFrameInfo(p, func, file, lineNo, address);
1907         } else {
1908             func = "[No stack]";
1909             file = QString();
1910             lineNo = -1;
1911             address = QString();
1912             p += 11;                    /* \n is skipped above */
1913         }
1914
1915         ThreadInfo* thr = new ThreadInfo;
1916         thr->id = id;
1917         thr->threadName = systag;
1918         thr->hasFocus = hasFocus;
1919         thr->function = func;
1920         thr->fileName = file;
1921         thr->lineNo = lineNo;
1922         thr->address = address;
1923         threads.append(thr);
1924     }
1925     return true;
1926 }
1927
1928 static bool parseNewBreakpoint(const char* o, int& id,
1929                                QString& file, int& lineNo, QString& address);
1930 static bool parseNewWatchpoint(const char* o, int& id,
1931                                QString& expr);
1932
1933 bool GdbDriver::parseBreakpoint(const char* output, int& id,
1934                                 QString& file, int& lineNo, QString& address)
1935 {
1936     const char* o = output;
1937     // skip lines of that begin with "(Cannot find"
1938     while (strncmp(o, "(Cannot find", 12) == 0) {
1939         o = strchr(o, '\n');
1940         if (o == 0)
1941             return false;
1942         o++;                            /* skip newline */
1943     }
1944
1945     if (strncmp(o, "Breakpoint ", 11) == 0) {
1946         output += 11;                   /* skip "Breakpoint " */
1947         return ::parseNewBreakpoint(output, id, file, lineNo, address);
1948     } else if (strncmp(o, "Hardware watchpoint ", 20) == 0) {
1949         output += 20;
1950         return ::parseNewWatchpoint(output, id, address);
1951     } else if (strncmp(o, "Watchpoint ", 11) == 0) {
1952         output += 11;
1953         return ::parseNewWatchpoint(output, id, address);
1954     }
1955     return false;
1956 }
1957
1958 static bool parseNewBreakpoint(const char* o, int& id,
1959                                QString& file, int& lineNo, QString& address)
1960 {
1961     // breakpoint id
1962     char* p;
1963     id = strtoul(o, &p, 10);
1964     if (p == o)
1965         return false;
1966
1967     // check for the address
1968     if (strncmp(p, " at 0x", 6) == 0) {
1969         char* start = p+4;             /* skip " at ", but not 0x */
1970         p += 6;
1971         while (isxdigit(*p))
1972             ++p;
1973         address = QString::fromLatin1(start, p-start);
1974     }
1975
1976     // file name
1977     char* fileStart = strstr(p, "file ");
1978     if (fileStart == 0)
1979         return !address.isEmpty();     /* parse error only if there's no address */
1980     fileStart += 5;
1981
1982     // line number
1983     char* numStart = strstr(fileStart, ", line ");
1984     QString fileName = QString::fromLatin1(fileStart, numStart-fileStart);
1985     numStart += 7;
1986     int line = strtoul(numStart, &p, 10);
1987     if (numStart == p)
1988         return false;
1989
1990     file = fileName;
1991     lineNo = line-1;                    /* zero-based! */
1992     return true;
1993 }
1994
1995 static bool parseNewWatchpoint(const char* o, int& id,
1996                                QString& expr)
1997 {
1998     // watchpoint id
1999     char* p;
2000     id = strtoul(o, &p, 10);
2001     if (p == o)
2002         return false;
2003
2004     if (strncmp(p, ": ", 2) != 0)
2005         return false;
2006     p += 2;
2007
2008     // all the rest on the line is the expression
2009     expr = QString::fromLatin1(p, strlen(p)).stripWhiteSpace();
2010     return true;
2011 }
2012
2013 void GdbDriver::parseLocals(const char* output, QList<ExprValue>& newVars)
2014 {
2015     // check for possible error conditions
2016     if (strncmp(output, "No symbol table", 15) == 0)
2017     {
2018         return;
2019     }
2020
2021     while (*output != '\0') {
2022         while (isspace(*output))
2023             output++;
2024         if (*output == '\0')
2025             break;
2026         // skip occurrences of "No locals" and "No args"
2027         if (strncmp(output, "No locals", 9) == 0 ||
2028             strncmp(output, "No arguments", 12) == 0)
2029         {
2030             output = strchr(output, '\n');
2031             if (output == 0) {
2032                 break;
2033             }
2034             continue;
2035         }
2036
2037         ExprValue* variable = parseVar(output);
2038         if (variable == 0) {
2039             break;
2040         }
2041         // do not add duplicates
2042         for (ExprValue* o = newVars.first(); o != 0; o = newVars.next()) {
2043             if (o->m_name == variable->m_name) {
2044                 delete variable;
2045                 goto skipDuplicate;
2046             }
2047         }
2048         newVars.append(variable);
2049     skipDuplicate:;
2050     }
2051 }
2052
2053 ExprValue* GdbDriver::parsePrintExpr(const char* output, bool wantErrorValue)
2054 {
2055     ExprValue* var = 0;
2056     // check for error conditions
2057     if (!parseErrorMessage(output, var, wantErrorValue))
2058     {
2059         // parse the variable
2060         var = parseVar(output);
2061     }
2062     return var;
2063 }
2064
2065 bool GdbDriver::parseChangeWD(const char* output, QString& message)
2066 {
2067     bool isGood = false;
2068     message = QString(output).simplifyWhiteSpace();
2069     if (message.isEmpty()) {
2070         message = i18n("New working directory: ") + m_programWD;
2071         isGood = true;
2072     }
2073     return isGood;
2074 }
2075
2076 bool GdbDriver::parseChangeExecutable(const char* output, QString& message)
2077 {
2078     message = output;
2079
2080     m_haveCoreFile = false;
2081
2082     /*
2083      * Lines starting with the following do not indicate errors:
2084      *     Using host libthread_db
2085      *     (no debugging symbols found)
2086      */
2087     while (strncmp(output, "Using host libthread_db", 23) == 0 ||
2088            strncmp(output, "(no debugging symbols found)", 28) == 0)
2089     {
2090         // this line is good, go to the next one
2091         const char* end = strchr(output, '\n');
2092         if (end == 0)
2093             output += strlen(output);
2094         else
2095             output = end+1;
2096     }
2097
2098     /*
2099      * If we've parsed all lines, there was no error.
2100      */
2101     return output[0] == '\0';
2102 }
2103
2104 bool GdbDriver::parseCoreFile(const char* output)
2105 {
2106     // if command succeeded, gdb emits a line starting with "#0 "
2107     m_haveCoreFile = strstr(output, "\n#0 ") != 0;
2108     return m_haveCoreFile;
2109 }
2110
2111 uint GdbDriver::parseProgramStopped(const char* output, QString& message)
2112 {
2113     // optionally: "program changed, rereading symbols",
2114     // followed by:
2115     // "Program exited normally"
2116     // "Program terminated with wignal SIGSEGV"
2117     // "Program received signal SIGINT" or other signal
2118     // "Breakpoint..."
2119
2120     // go through the output, line by line, checking what we have
2121     const char* start = output - 1;
2122     uint flags = SFprogramActive;
2123     message = QString();
2124     do {
2125         start++;                        /* skip '\n' */
2126
2127         if (strncmp(start, "Program ", 8) == 0 ||
2128             strncmp(start, "ptrace: ", 8) == 0) {
2129             /*
2130              * When we receive a signal, the program remains active.
2131              *
2132              * Special: If we "stopped" in a corefile, the string "Program
2133              * terminated with signal"... is displayed. (Normally, we see
2134              * "Program received signal"... when a signal happens.)
2135              */
2136             if (strncmp(start, "Program exited", 14) == 0 ||
2137                 (strncmp(start, "Program terminated", 18) == 0 && !m_haveCoreFile) ||
2138                 strncmp(start, "ptrace: ", 8) == 0)
2139             {
2140                 flags &= ~SFprogramActive;
2141             }
2142
2143             // set message
2144             const char* endOfMessage = strchr(start, '\n');
2145             if (endOfMessage == 0)
2146                 endOfMessage = start + strlen(start);
2147             message = QString::fromLatin1(start, endOfMessage-start);
2148         } else if (strncmp(start, "Breakpoint ", 11) == 0) {
2149             /*
2150              * We stopped at a (permanent) breakpoint (gdb doesn't tell us
2151              * that it stopped at a temporary breakpoint).
2152              */
2153             flags |= SFrefreshBreak;
2154         } else if (strstr(start, "re-reading symbols.") != 0) {
2155             flags |= SFrefreshSource;
2156         }
2157
2158         // next line, please
2159         start = strchr(start, '\n');
2160     } while (start != 0);
2161
2162     /*
2163      * Gdb only notices when new threads have appeared, but not when a
2164      * thread finishes. So we always have to assume that the list of
2165      * threads has changed.
2166      */
2167     flags |= SFrefreshThreads;
2168
2169     return flags;
2170 }
2171
2172 void GdbDriver::parseSharedLibs(const char* output, QStrList& shlibs)
2173 {
2174     if (strncmp(output, "No shared libraries loaded", 26) == 0)
2175         return;
2176
2177     // parse the table of shared libraries
2178
2179     // strip off head line
2180     output = strchr(output, '\n');
2181     if (output == 0)
2182         return;
2183     output++;                           /* skip '\n' */
2184     QString shlibName;
2185     while (*output != '\0') {
2186         // format of a line is
2187         // 0x404c5000  0x40580d90  Yes         /lib/libc.so.5
2188         // 3 blocks of non-space followed by space
2189         for (int i = 0; *output != '\0' && i < 3; i++) {
2190             while (*output != '\0' && !isspace(*output)) {      /* non-space */
2191                 output++;
2192             }
2193             while (isspace(*output)) {  /* space */
2194                 output++;
2195             }
2196         }
2197         if (*output == '\0')
2198             return;
2199         const char* start = output;
2200         output = strchr(output, '\n');
2201         if (output == 0)
2202             output = start + strlen(start);
2203         shlibName = QString::fromLatin1(start, output-start);
2204         if (*output != '\0')
2205             output++;
2206         shlibs.append(shlibName);
2207         TRACE("found shared lib " + shlibName);
2208     }
2209 }
2210
2211 bool GdbDriver::parseFindType(const char* output, QString& type)
2212 {
2213     if (strncmp(output, "type = ", 7) != 0)
2214         return false;
2215
2216     /*
2217      * Everything else is the type. We strip off any leading "const" and any
2218      * trailing "&" on the grounds that neither affects the decoding of the
2219      * object. We also strip off all white-space from the type.
2220      */
2221     output += 7;
2222     if (strncmp(output, "const ", 6) == 0)
2223         output += 6;
2224     type = output;
2225     type.replace(QRegExp("\\s+"), "");
2226     if (type.endsWith("&"))
2227         type.truncate(type.length() - 1);
2228     return true;
2229 }
2230
2231 void GdbDriver::parseRegisters(const char* output, QList<RegisterInfo>& regs)
2232 {
2233     if (strncmp(output, "The program has no registers now", 32) == 0) {
2234         return;
2235     }
2236
2237     QString regName;
2238     QString value;
2239
2240     // parse register values
2241     while (*output != '\0')
2242     {
2243         // skip space at the start of the line
2244         while (isspace(*output))
2245             output++;
2246
2247         // register name
2248         const char* start = output;
2249         while (*output != '\0' && !isspace(*output))
2250             output++;
2251         if (*output == '\0')
2252             break;
2253         regName = QString::fromLatin1(start, output-start);
2254
2255         // skip space
2256         while (isspace(*output))
2257             output++;
2258
2259         RegisterInfo* reg = new RegisterInfo;
2260         reg->regName = regName;
2261
2262         /*
2263          * If we find a brace now, this is a vector register. We look for
2264          * the closing brace and treat the result as cooked value.
2265          */
2266         if (*output == '{')
2267         {
2268             start = output;
2269             skipNested(output, '{', '}');
2270             value = QString::fromLatin1(start, output-start).simplifyWhiteSpace();
2271             // skip space, but not the end of line
2272             while (isspace(*output) && *output != '\n')
2273                 output++;
2274             // get rid of the braces at the begining and the end
2275             value.remove(0, 1);
2276             if (value[value.length()-1] == '}') {
2277                 value = value.left(value.length()-1);
2278             }
2279             // gdb 5.3 doesn't print a separate set of raw values
2280             if (*output == '{') {
2281                 // another set of vector follows
2282                 // what we have so far is the raw value
2283                 reg->rawValue = value;
2284
2285                 start = output;
2286                 skipNested(output, '{', '}');
2287                 value = QString::fromLatin1(start, output-start).simplifyWhiteSpace();
2288             } else {
2289                 // for gdb 5.3
2290                 // find first type that does not have an array, this is the RAW value
2291                 const char* end=start;
2292                 findEnd(end);
2293                 const char* cur=start;
2294                 while (cur<end) {
2295                     while (*cur != '=' && cur<end)
2296                         cur++;
2297                     cur++;
2298                     while (isspace(*cur) && cur<end)
2299                         cur++;
2300                     if (isNumberish(*cur)) {
2301                         end=cur;
2302                         while (*end && (*end!='}') && (*end!=',') && (*end!='\n'))
2303                             end++;
2304                         QString rawValue = QString::fromLatin1(cur, end-cur).simplifyWhiteSpace();
2305                         reg->rawValue = rawValue;
2306
2307                         if (rawValue.left(2)=="0x") {
2308                             // ok we have a raw value, now get it's type
2309                             end=cur-1;
2310                             while (isspace(*end) || *end=='=') end--;
2311                             end++;
2312                             cur=end-1;
2313                             while (*cur!='{' && *cur!=' ')
2314                                 cur--;
2315                             cur++;
2316                             reg->type=QString::fromLatin1(cur, end-cur);
2317                         }
2318
2319                         // end while loop
2320                         cur=end;
2321                     }
2322                 }
2323                 // skip to the end of line
2324                 while (*output != '\0' && *output != '\n')
2325                     output++;
2326                 // get rid of the braces at the begining and the end
2327                 value.remove(0, 1);
2328                 if (value[value.length()-1] == '}') {
2329                     value = value.left(value.length()-1);
2330                 }
2331             }
2332             reg->cookedValue = value;
2333         }
2334         else
2335         {
2336             // the rest of the line is the register value
2337             start = output;
2338             output = strchr(output,'\n');
2339             if (output == 0)
2340                 output = start + strlen(start);
2341             value = QString::fromLatin1(start, output-start).simplifyWhiteSpace();
2342
2343             /*
2344              * We split the raw from the cooked values.
2345              * Some modern gdbs explicitly say: "0.1234 (raw 0x3e4567...)".
2346              * Here, the cooked value comes first, and the raw value is in
2347              * the second part.
2348              */
2349             int pos = value.find(" (raw ");
2350             if (pos >= 0)
2351             {
2352                 reg->cookedValue = value.left(pos);
2353                 reg->rawValue = value.mid(pos+6);
2354                 if (reg->rawValue.right(1) == ")")      // remove closing bracket
2355                     reg->rawValue.truncate(reg->rawValue.length()-1);
2356             }
2357             else
2358             {
2359                 /*
2360                 * In other cases we split off the first token (separated by
2361                 * whitespace). It is the raw value. The remainder of the line
2362                 * is the cooked value.
2363                 */
2364                 int pos = value.find(' ');
2365                 if (pos < 0) {
2366                     reg->rawValue = value;
2367                     reg->cookedValue = QString();
2368                 } else {
2369                     reg->rawValue = value.left(pos);
2370                     reg->cookedValue = value.mid(pos+1);
2371                 }
2372             }
2373         }
2374         if (*output != '\0')
2375             output++;                   /* skip '\n' */
2376
2377         regs.append(reg);
2378     }
2379 }
2380
2381 bool GdbDriver::parseInfoLine(const char* output, QString& addrFrom, QString& addrTo)
2382 {
2383     // "is at address" or "starts at address"
2384     const char* start = strstr(output, "s at address ");
2385     if (start == 0)
2386         return false;
2387
2388     start += 13;
2389     const char* p = start;
2390     while (*p != '\0' && !isspace(*p))
2391         p++;
2392     addrFrom = QString::fromLatin1(start, p-start);
2393
2394     start = strstr(p, "and ends at ");
2395     if (start == 0) {
2396         addrTo = addrFrom;
2397         return true;
2398     }
2399
2400     start += 12;
2401     p = start;
2402     while (*p != '\0' && !isspace(*p))
2403         p++;
2404     addrTo = QString::fromLatin1(start, p-start);
2405
2406     return true;
2407 }
2408
2409 void GdbDriver::parseDisassemble(const char* output, QList<DisassembledCode>& code)
2410 {
2411     code.clear();
2412
2413     if (strncmp(output, "Dump of assembler", 17) != 0) {
2414         // error message?
2415         DisassembledCode c;
2416         c.code = output;
2417         code.append(new DisassembledCode(c));
2418         return;
2419     }
2420
2421     // remove first line
2422     const char* p = strchr(output, '\n');
2423     if (p == 0)
2424         return;                         /* not a regular output */
2425
2426     p++;
2427
2428     // remove last line
2429     const char* end = strstr(output, "End of assembler");
2430     if (end == 0)
2431         end = p + strlen(p);
2432
2433     DbgAddr address;
2434
2435     // remove function offsets from the lines
2436     while (p != end)
2437     {
2438         const char* start = p;
2439         // address
2440         while (p != end && !isspace(*p))
2441             p++;
2442         address = QString::fromLatin1(start, p-start);
2443
2444         // function name (enclosed in '<>', followed by ':')
2445         while (p != end && *p != '<')
2446             p++;
2447         if (*p == '<')
2448             skipNestedAngles(p);
2449         if (*p == ':')
2450             p++;
2451
2452         // space until code
2453         while (p != end && isspace(*p))
2454             p++;
2455
2456         // code until end of line
2457         start = p;
2458         while (p != end && *p != '\n')
2459             p++;
2460         if (p != end)                   /* include '\n' */
2461             p++;
2462
2463         DisassembledCode* c = new DisassembledCode;
2464         c->address = address;
2465         c->code = QString::fromLatin1(start, p-start);
2466         code.append(c);
2467     }
2468 }
2469
2470 QString GdbDriver::parseMemoryDump(const char* output, QList<MemoryDump>& memdump)
2471 {
2472     if (isErrorExpr(output)) {
2473         // error; strip space
2474         QString msg = output;
2475         return msg.stripWhiteSpace();
2476     }
2477
2478     const char* p = output;             /* save typing */
2479     DbgAddr addr;
2480     QString dump;
2481
2482     // the address
2483     while (*p != 0) {
2484         const char* start = p;
2485         while (*p != '\0' && *p != ':' && !isspace(*p))
2486             p++;
2487         addr = QString::fromLatin1(start, p-start);
2488         if (*p != ':') {
2489             // parse function offset
2490             while (isspace(*p))
2491                 p++;
2492             start = p;
2493             while (*p != '\0' && !(*p == ':' && isspace(p[1])))
2494                 p++;
2495             addr.fnoffs = QString::fromLatin1(start, p-start);
2496         }
2497         if (*p == ':')
2498             p++;
2499         // skip space; this may skip a new-line char!
2500         while (isspace(*p))
2501             p++;
2502         // everything to the end of the line is the memory dump
2503         const char* end = strchr(p, '\n');
2504         if (end != 0) {
2505             dump = QString::fromLatin1(p, end-p);
2506             p = end+1;
2507         } else {
2508             dump = QString::fromLatin1(p, strlen(p));
2509             p += strlen(p);
2510         }
2511         MemoryDump* md = new MemoryDump;
2512         md->address = addr;
2513         md->dump = dump;
2514         memdump.append(md);
2515     }
2516
2517     return QString();
2518 }
2519
2520 QString GdbDriver::editableValue(VarTree* value)
2521 {
2522     const char* s = value->value().latin1();
2523
2524     // if the variable is a pointer value that contains a cast,
2525     // remove the cast
2526     if (*s == '(') {
2527         skipNested(s, '(', ')');
2528         // skip space
2529         while (isspace(*s))
2530             ++s;
2531     }
2532
2533 repeat:
2534     const char* start = s;
2535
2536     if (strncmp(s, "0x", 2) == 0)
2537     {
2538         s += 2;
2539         while (isxdigit(*s))
2540             ++s;
2541
2542         /*
2543          * What we saw so far might have been a reference. If so, edit the
2544          * referenced value. Otherwise, edit the pointer.
2545          */
2546         if (*s == ':') {
2547             // a reference
2548             ++s;
2549             goto repeat;
2550         }
2551         // a pointer
2552         // if it's a pointer to a string, remove the string
2553         const char* end = s;
2554         while (isspace(*s))
2555             ++s;
2556         if (*s == '"') {
2557             // a string
2558             return QString::fromLatin1(start, end-start);
2559         } else {
2560             // other pointer
2561             return QString::fromLatin1(start, strlen(start));
2562         }
2563     }
2564
2565     // else leave it unchanged (or stripped of the reference preamble)
2566     return s;
2567 }
2568
2569 QString GdbDriver::parseSetVariable(const char* output)
2570 {
2571     // if there is any output, it is an error message
2572     QString msg = output;
2573     return msg.stripWhiteSpace();
2574 }
2575
2576
2577 #include "gdbdriver.moc"