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 VarTree* parseVar(const char*& s);
  24 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind);
  25 static bool parseValue(const char*& s, VarTree* variable);
  26 static bool parseNested(const char*& s, VarTree* variable);
  27 static bool parseVarSeq(const char*& s, VarTree* variable);
  28 static bool parseValueSeq(const char*& s, VarTree* 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     { DCsetvariable, "set variable %s=%s\n", GdbCmdInfo::argString2 },
 119 };
 120
 121 #define NUM_CMDS (int(sizeof(cmds)/sizeof(cmds[0])))
 122 #define MAX_FMTLEN 200
 123
 124 GdbDriver::GdbDriver() :
 125         DebuggerDriver(),
 126         m_gdbMajor(4), m_gdbMinor(16)
 127 {
 128     strcpy(m_prompt, PROMPT);
 129     m_promptMinLen = PROMPT_LEN;
 130     m_promptLastChar = PROMPT_LAST_CHAR;
 131
 132 #ifndef NDEBUG
 133     // check command info array
 134     char* perc;
 135     for (int i = 0; i < NUM_CMDS; i++) {
 136         // must be indexable by DbgCommand values, i.e. sorted by DbgCommand values
 137         assert(i == cmds[i].cmd);
 138         // a format string must be associated
 139         assert(cmds[i].fmt != 0);
 140         assert(strlen(cmds[i].fmt) <= MAX_FMTLEN);
 141         // format string must match arg specification
 142         switch (cmds[i].argsNeeded) {
 143         case GdbCmdInfo::argNone:
 144             assert(strchr(cmds[i].fmt, '%') == 0);
 145             break;
 146         case GdbCmdInfo::argString:
 147             perc = strchr(cmds[i].fmt, '%');
 148             assert(perc != 0 && perc[1] == 's');
 149             assert(strchr(perc+2, '%') == 0);
 150             break;
 151         case GdbCmdInfo::argNum:
 152             perc = strchr(cmds[i].fmt, '%');
 153             assert(perc != 0 && perc[1] == 'd');
 154             assert(strchr(perc+2, '%') == 0);
 155             break;
 156         case GdbCmdInfo::argStringNum:
 157             perc = strchr(cmds[i].fmt, '%');
 158             assert(perc != 0 && perc[1] == 's');
 159             perc = strchr(perc+2, '%');
 160             assert(perc != 0 && perc[1] == 'd');
 161             assert(strchr(perc+2, '%') == 0);
 162             break;
 163         case GdbCmdInfo::argNumString:
 164             perc = strchr(cmds[i].fmt, '%');
 165             assert(perc != 0 && perc[1] == 'd');
 166             perc = strchr(perc+2, '%');
 167             assert(perc != 0 && perc[1] == 's');
 168             assert(strchr(perc+2, '%') == 0);
 169             break;
 170         case GdbCmdInfo::argString2:
 171             perc = strchr(cmds[i].fmt, '%');
 172             assert(perc != 0 && perc[1] == 's');
 173             perc = strchr(perc+2, '%');
 174             assert(perc != 0 && perc[1] == 's');
 175             assert(strchr(perc+2, '%') == 0);
 176             break;
 177         case GdbCmdInfo::argNum2:
 178             perc = strchr(cmds[i].fmt, '%');
 179             assert(perc != 0 && perc[1] == 'd');
 180             perc = strchr(perc+2, '%');
 181             assert(perc != 0 && perc[1] == 'd');
 182             assert(strchr(perc+2, '%') == 0);
 183             break;
 184         }
 185     }
 186     assert(strlen(printQStringStructFmt) <= MAX_FMTLEN);
 187 #endif
 188 }
 189
 190 GdbDriver::~GdbDriver()
 191 {
 192 }
 193
 194
 195 QString GdbDriver::driverName() const
 196 {
 197     return "GDB";
 198 }
 199
 200 QString GdbDriver::defaultGdb()
 201 {
 202     return
 203         "gdb"
 204         " --fullname"   /* to get standard file names each time the prog stops */
 205         " --nx";        /* do not execute initialization files */
 206 }
 207
 208 QString GdbDriver::defaultInvocation() const
 209 {
 210     if (m_defaultCmd.isEmpty()) {
 211         return defaultGdb();
 212     } else {
 213         return m_defaultCmd;
 214     }
 215 }
 216
 217 QStringList GdbDriver::boolOptionList() const
 218 {
 219     // no options
 220     return QStringList();
 221 }
 222
 223 bool GdbDriver::startup(QString cmdStr)
 224 {
 225     if (!DebuggerDriver::startup(cmdStr))
 226         return false;
 227
 228     static const char gdbInitialize[] =
 229         /*
 230          * Work around buggy gdbs that do command line editing even if they
 231          * are not on a tty. The readline library echos every command back
 232          * in this case, which is confusing for us.
 233          */
 234         "set editing off\n"
 235         "set confirm off\n"
 236         "set print static-members off\n"
 237         "set print asm-demangle on\n"
 238         /*
 239          * Don't assume that program functions invoked from a watch expression
 240          * always succeed.
 241          */
 242         "set unwindonsignal on\n"
 243         /*
 244          * Write a short macro that prints all locals: local variables and
 245          * function arguments.
 246          */
 247         "define kdbg__alllocals\n"
 248         "info locals\n"                 /* local vars supersede args with same name */
 249         "info args\n"                   /* therefore, arguments must come last */
 250         "end\n"
 251         /*
 252          * Work around a bug in gdb-6.3: "info line main" crashes gdb.
 253          */
 254         "define kdbg_infolinemain\n"
 255         "list\n"
 256         "info line\n"
 257         "end\n"
 258         // change prompt string and synchronize with gdb
 259         "set prompt " PROMPT "\n"
 260         ;
 261
 262     executeCmdString(DCinitialize, gdbInitialize, false);
 263
 264     // assume that QString::null is ok
 265     cmds[DCprintQStringStruct].fmt = printQStringStructFmt;
 266
 267     return true;
 268 }
 269
 270 void GdbDriver::commandFinished(CmdQueueItem* cmd)
 271 {
 272     // command string must be committed
 273     if (!cmd->m_committed) {
 274         // not commited!
 275         TRACE("calling " + (__PRETTY_FUNCTION__ + (" with uncommited command:\n\t" +
 276               cmd->m_cmdString)));
 277         return;
 278     }
 279
 280     switch (cmd->m_cmd) {
 281     case DCinitialize:
 282         // get version number from preamble
 283         {
 284             int len;
 285             QRegExp GDBVersion("\\nGDB [0-9]+\\.[0-9]+");
 286             int offset = GDBVersion.match(m_output, 0, &len);
 287             if (offset >= 0) {
 288                 char* start = m_output + offset + 5;    // skip "\nGDB "
 289                 char* end;
 290                 m_gdbMajor = strtol(start, &end, 10);
 291                 m_gdbMinor = strtol(end + 1, 0, 10);    // skip "."
 292                 if (start == end) {
 293                     // nothing was parsed
 294                     m_gdbMajor = 4;
 295                     m_gdbMinor = 16;
 296                 }
 297             } else {
 298                 // assume some default version (what would make sense?)
 299                 m_gdbMajor = 4;
 300                 m_gdbMinor = 16;
 301             }
 302             // use a feasible core-file command
 303             if (m_gdbMajor > 4 || (m_gdbMajor == 4 && m_gdbMinor >= 16)) {
 304                 cmds[DCcorefile].fmt = "target core %s\n";
 305             } else {
 306                 cmds[DCcorefile].fmt = "core-file %s\n";
 307             }
 308         }
 309         break;
 310     default:;
 311     }
 312
 313     /* ok, the command is ready */
 314     emit commandReceived(cmd, m_output);
 315
 316     switch (cmd->m_cmd) {
 317     case DCcorefile:
 318     case DCinfolinemain:
 319     case DCframe:
 320     case DCattach:
 321     case DCrun:
 322     case DCcont:
 323     case DCstep:
 324     case DCstepi:
 325     case DCnext:
 326     case DCnexti:
 327     case DCfinish:
 328     case DCuntil:
 329         parseMarker();
 330     default:;
 331     }
 332 }
 333
 334 /*
 335  * The --fullname option makes gdb send a special normalized sequence print
 336  * each time the program stops and at some other points. The sequence has
 337  * the form "\032\032filename:lineno:charoffset:(beg|middle):address".
 338  */
 339 void GdbDriver::parseMarker()
 340 {
 341     char* startMarker = strstr(m_output, "\032\032");
 342     if (startMarker == 0)
 343         return;
 344
 345     // extract the marker
 346     startMarker += 2;
 347     TRACE(QString("found marker: ") + startMarker);
 348     char* endMarker = strchr(startMarker, '\n');
 349     if (endMarker == 0)
 350         return;
 351
 352     *endMarker = '\0';
 353
 354     // extract filename and line number
 355     static QRegExp MarkerRE(":[0-9]+:[0-9]+:[begmidl]+:0x");
 356
 357     int len;
 358     int lineNoStart = MarkerRE.match(startMarker, 0, &len);
 359     if (lineNoStart >= 0) {
 360         int lineNo = atoi(startMarker + lineNoStart+1);
 361
 362         // get address
 363         const char* addrStart = startMarker + lineNoStart + len - 2;
 364         DbgAddr address = QString(addrStart).stripWhiteSpace();
 365
 366         // now show the window
 367         startMarker[lineNoStart] = '\0';   /* split off file name */
 368         emit activateFileLine(startMarker, lineNo-1, address);
 369     }
 370 }
 371
 372
 373 /*
 374  * Escapes characters that might lead to problems when they appear on gdb's
 375  * command line.
 376  */
 377 static void normalizeStringArg(QString& arg)
 378 {
 379     /*
 380      * Remove trailing backslashes. This approach is a little simplistic,
 381      * but we know that there is at the moment no case where a trailing
 382      * backslash would make sense.
 383      */
 384     while (!arg.isEmpty() && arg[arg.length()-1] == '\\') {
 385         arg = arg.left(arg.length()-1);
 386     }
 387 }
 388
 389
 390 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg)
 391 {
 392     assert(cmd >= 0 && cmd < NUM_CMDS);
 393     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString);
 394
 395     normalizeStringArg(strArg);
 396
 397     if (cmd == DCcd) {
 398         // need the working directory when parsing the output
 399         m_programWD = strArg;
 400     } else if (cmd == DCsetargs && !m_redirect.isEmpty()) {
 401         /*
 402          * Use saved redirection. We prepend it in front of the user's
 403          * arguments so that the user can override the redirections.
 404         */
 405         strArg = m_redirect + " " + strArg;
 406     }
 407
 408     SIZED_QString(cmdString, MAX_FMTLEN+strArg.length());
 409     cmdString.sprintf(cmds[cmd].fmt, strArg.latin1());
 410     return cmdString;
 411 }
 412
 413 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg)
 414 {
 415     assert(cmd >= 0 && cmd < NUM_CMDS);
 416     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum);
 417
 418     SIZED_QString(cmdString, MAX_FMTLEN+30);
 419
 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     SIZED_QString(cmdString, MAX_FMTLEN+30+strArg.length());
 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     SIZED_QString(cmdString, MAX_FMTLEN+strArg1.length()+strArg2.length());
 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     SIZED_QString(cmdString, MAX_FMTLEN+60);
 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 VarTree 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                               VarTree*& 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 VarTree(QString(), VarTree::NKplain);
 679             const char* endMsg = strchr(output, '\n');
 680             if (endMsg == 0)
 681                 endMsg = output + strlen(output);
 682             variable->m_value = FROM_LATIN1(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 VarTree* GdbDriver::parseQCharArray(const char* output, bool wantErrorValue, bool qt3like)
 711 {
 712     VarTree* 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 VarTree(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 = FROM_LATIN1(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 VarTree(QString(), VarTree::NKplain);
 843         variable->m_value = result;
 844     }
 845     else if (strncmp(p, "true", 4) == 0)
 846     {
 847         variable = new VarTree(QString(), VarTree::NKplain);
 848         variable->m_value = "QString::null";
 849     }
 850     else if (strncmp(p, "false", 5) == 0)
 851     {
 852         variable = new VarTree(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 VarTree(QString(), VarTree::NKplain);
 862         variable->m_value = "internal parse error";
 863     }
 864     return variable;
 865 }
 866
 867 static VarTree* 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     if (!parseName(p, name, kind)) {
 878         return 0;
 879     }
 880
 881     // go for '='
 882     while (isspace(*p))
 883         p++;
 884     if (*p != '=') {
 885         TRACE(QString().sprintf("parse error: = not found after %s", (const char*)name));
 886         return 0;
 887     }
 888     // skip the '=' and more whitespace
 889     p++;
 890     while (isspace(*p))
 891         p++;
 892
 893     VarTree* variable = new VarTree(name, kind);
 894     variable->setDeleteChildren(true);
 895
 896     if (!parseValue(p, variable)) {
 897         delete variable;
 898         return 0;
 899     }
 900     s = p;
 901     return variable;
 902 }
 903
 904 static void skipNested(const char*& s, char opening, char closing)
 905 {
 906     const char* p = s;
 907
 908     // parse a nested type
 909     int nest = 1;
 910     p++;
 911     /*
 912      * Search for next matching `closing' char, skipping nested pairs of
 913      * `opening' and `closing'.
 914      */
 915     while (*p && nest > 0) {
 916         if (*p == opening) {
 917             nest++;
 918         } else if (*p == closing) {
 919             nest--;
 920         }
 921         p++;
 922     }
 923     if (nest != 0) {
 924         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
 925     }
 926     s = p;
 927 }
 928
 929 /**
 930  * This function skips text that is delimited by nested angle bracktes, '<>'.
 931  * A complication arises because the delimited text can contain the names of
 932  * operator<<, operator>>, operator<, and operator>, which have to be treated
 933  * specially so that they do not count towards the nesting of '<>'.
 934  * This function assumes that the delimited text does not contain strings.
 935  */
 936 static void skipNestedAngles(const char*& s)
 937 {
 938     const char* p = s;
 939
 940     int nest = 1;
 941     p++;                // skip the initial '<'
 942     while (*p && nest > 0)
 943     {
 944         // Below we can check for p-s >= 9 instead of 8 because
 945         // *s is '<' and cannot be part of "operator".
 946         if (*p == '<')
 947         {
 948             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 949                 if (p[1] == '<')
 950                     p++;
 951             } else {
 952                 nest++;
 953             }
 954         }
 955         else if (*p == '>')
 956         {
 957             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 958                 if (p[1] == '>')
 959                     p++;
 960             } else {
 961                 nest--;
 962             }
 963         }
 964         p++;
 965     }
 966     if (nest != 0) {
 967         TRACE(QString().sprintf("parse error: mismatching <> at %-20.20s", s));
 968     }
 969     s = p;
 970 }
 971
 972 /**
 973  * Find the end of line that is not inside braces
 974  */
 975 static void findEnd(const char*& s)
 976 {
 977     const char* p = s;
 978     while (*p && *p!='\n') {
 979         while (*p && *p!='\n' && *p!='{')
 980             p++;
 981         if (*p=='{') {
 982             p++;
 983             skipNested(p, '{', '}'); p--;
 984         }
 985     }
 986     s = p;
 987 }
 988
 989 static bool isNumberish(const char ch)
 990 {
 991     return (ch>='0' && ch<='9') || ch=='.' || ch=='x';
 992 }
 993
 994 void skipString(const char*& p)
 995 {
 996 moreStrings:
 997     // opening quote
 998     char quote = *p++;
 999     while (*p != quote) {
1000         if (*p == '\\') {
1001             // skip escaped character
1002             // no special treatment for octal values necessary
1003             p++;
1004         }
1005         // simply return if no more characters
1006         if (*p == '\0')
1007             return;
1008         p++;
1009     }
1010     // closing quote
1011     p++;
1012     /*
1013      * Strings can consist of several parts, some of which contain repeated
1014      * characters.
1015      */
1016     if (quote == '\'') {
1017         // look ahaead for <repeats 123 times>
1018         const char* q = p+1;
1019         while (isspace(*q))
1020             q++;
1021         if (strncmp(q, "<repeats ", 9) == 0) {
1022             p = q+9;
1023             while (*p != '\0' && *p != '>')
1024                 p++;
1025             if (*p != '\0') {
1026                 p++;                    /* skip the '>' */
1027             }
1028         }
1029     }
1030     // is the string continued?
1031     if (*p == ',') {
1032         // look ahead for another quote
1033         const char* q = p+1;
1034         while (isspace(*q))
1035             q++;
1036         if (*q == '"' || *q == '\'') {
1037             // yes!
1038             p = q;
1039             goto moreStrings;
1040         }
1041     }
1042     /* very long strings are followed by `...' */
1043     if (*p == '.' && p[1] == '.' && p[2] == '.') {
1044         p += 3;
1045     }
1046 }
1047
1048 static void skipNestedWithString(const char*& s, char opening, char closing)
1049 {
1050     const char* p = s;
1051
1052     // parse a nested expression
1053     int nest = 1;
1054     p++;
1055     /*
1056      * Search for next matching `closing' char, skipping nested pairs of
1057      * `opening' and `closing' as well as strings.
1058      */
1059     while (*p && nest > 0) {
1060         if (*p == opening) {
1061             nest++;
1062         } else if (*p == closing) {
1063             nest--;
1064         } else if (*p == '\'' || *p == '\"') {
1065             skipString(p);
1066             continue;
1067         }
1068         p++;
1069     }
1070     if (nest > 0) {
1071         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
1072     }
1073     s = p;
1074 }
1075
1076 inline void skipName(const char*& p)
1077 {
1078     // allow : (for enumeration values) and $ and . (for _vtbl.)
1079     while (isalnum(*p) || *p == '_' || *p == ':' || *p == '$' || *p == '.')
1080         p++;
1081 }
1082
1083 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind)
1084 {
1085     kind = VarTree::NKplain;
1086
1087     const char* p = s;
1088     // examples of names:
1089     //  name
1090     //  <Object>
1091     //  <string<a,b<c>,7> >
1092
1093     if (*p == '<') {
1094         skipNestedAngles(p);
1095         name = FROM_LATIN1(s, p - s);
1096         kind = VarTree::NKtype;
1097     }
1098     else
1099     {
1100         // name, which might be "static"; allow dot for "_vtbl."
1101         skipName(p);
1102         if (p == s) {
1103             TRACE(QString().sprintf("parse error: not a name %-20.20s", s));
1104             return false;
1105         }
1106         int len = p - s;
1107         if (len == 6 && strncmp(s, "static", 6) == 0) {
1108             kind = VarTree::NKstatic;
1109
1110             // its a static variable, name comes now
1111             while (isspace(*p))
1112                 p++;
1113             s = p;
1114             skipName(p);
1115             if (p == s) {
1116                 TRACE(QString().sprintf("parse error: not a name after static %-20.20s", s));
1117                 return false;
1118             }
1119             len = p - s;
1120         }
1121         name = FROM_LATIN1(s, len);
1122     }
1123     // return the new position
1124     s = p;
1125     return true;
1126 }
1127
1128 static bool parseValue(const char*& s, VarTree* variable)
1129 {
1130     variable->m_value = "";
1131
1132 repeat:
1133     if (*s == '{') {
1134         // Sometimes we find the following output:
1135         //  {<text variable, no debug info>} 0x40012000 <access>
1136         //  {<data variable, no debug info>}
1137         //  {<variable (not text or data), no debug info>}
1138         if (strncmp(s, "{<text variable, ", 17) == 0 ||
1139             strncmp(s, "{<data variable, ", 17) == 0 ||
1140             strncmp(s, "{<variable (not text or data), ", 31) == 0)
1141         {
1142             const char* start = s;
1143             skipNested(s, '{', '}');
1144             variable->m_value = FROM_LATIN1(start, s-start);
1145             variable->m_value += ' ';   // add only a single space
1146             while (isspace(*s))
1147                 s++;
1148             goto repeat;
1149         }
1150         else
1151         {
1152             s++;
1153             if (!parseNested(s, variable)) {
1154                 return false;
1155             }
1156             // must be the closing brace
1157             if (*s != '}') {
1158                 TRACE("parse error: missing } of " +  variable->getText());
1159                 return false;
1160             }
1161             s++;
1162             // final white space
1163             while (isspace(*s))
1164                 s++;
1165         }
1166     } else {
1167         // examples of leaf values (cannot be the empty string):
1168         //  123
1169         //  -123
1170         //  23.575e+37
1171         //  0x32a45
1172         //  @0x012ab4
1173         //  (DwContentType&) @0x8123456: {...}
1174         //  0x32a45 "text"
1175         //  10 '\n'
1176         //  <optimized out>
1177         //  0x823abc <Array<int> virtual table>
1178         //  (void (*)()) 0x8048480 <f(E *, char)>
1179         //  (E *) 0xbffff450
1180         //  red
1181         //  &parseP (HTMLClueV *, char *)
1182         //  Variable "x" is not available.
1183         //  The value of variable 'x' is distributed...
1184         //  -nan(0xfffff081defa0)
1185
1186         const char*p = s;
1187
1188         // check for type
1189         QString type;
1190         if (*p == '(') {
1191             skipNested(p, '(', ')');
1192
1193             while (isspace(*p))
1194                 p++;
1195             variable->m_value = FROM_LATIN1(s, p - s);
1196         }
1197
1198         bool reference = false;
1199         if (*p == '@') {
1200             // skip reference marker
1201             p++;
1202             reference = true;
1203         }
1204         const char* start = p;
1205         if (*p == '-')
1206             p++;
1207
1208         // some values consist of more than one token
1209         bool checkMultiPart = false;
1210
1211         if (p[0] == '0' && p[1] == 'x') {
1212             // parse hex number
1213             p += 2;
1214             while (isxdigit(*p))
1215                 p++;
1216
1217             /*
1218              * Assume this is a pointer, but only if it's not a reference, since
1219              * references can't be expanded.
1220              */
1221             if (!reference) {
1222                 variable->m_varKind = VarTree::VKpointer;
1223             } else {
1224                 /*
1225                  * References are followed by a colon, in which case we'll
1226                  * find the value following the reference address.
1227                  */
1228                 if (*p == ':') {
1229                     p++;
1230                 } else {
1231                     // Paranoia. (Can this happen, i.e. reference not followed by ':'?)
1232                     reference = false;
1233                 }
1234             }
1235             checkMultiPart = true;
1236         } else if (isdigit(*p)) {
1237             // parse decimal number, possibly a float
1238             while (isdigit(*p))
1239                 p++;
1240             if (*p == '.') {            /* TODO: obey i18n? */
1241                 // In long arrays an integer may be followed by '...'.
1242                 // We test for this situation and don't gobble the '...'.
1243                 if (p[1] != '.' || p[0] != '.') {
1244                     // fractional part
1245                     p++;
1246                     while (isdigit(*p))
1247                         p++;
1248                 }
1249             }
1250             if (*p == 'e' || *p == 'E') {
1251                 p++;
1252                 // exponent
1253                 if (*p == '-' || *p == '+')
1254                     p++;
1255                 while (isdigit(*p))
1256                     p++;
1257             }
1258
1259             // for char variables there is the char, eg. 10 '\n'
1260             checkMultiPart = true;
1261         } else if (*p == '<') {
1262             // e.g. <optimized out>
1263             skipNestedAngles(p);
1264         } else if (*p == '"' || *p == '\'') {
1265             // character may have multipart: '\000' <repeats 11 times>
1266             checkMultiPart = *p == '\'';
1267             // found a string
1268             skipString(p);
1269         } else if (*p == '&') {
1270             // function pointer
1271             p++;
1272             skipName(p);
1273             while (isspace(*p)) {
1274                 p++;
1275             }
1276             if (*p == '(') {
1277                 skipNested(p, '(', ')');
1278             }
1279         } else if (strncmp(p, "Variable \"", 10) == 0) {
1280             // Variable "x" is not available.
1281             p += 10;            // skip to "
1282             skipName(p);
1283             if (strncmp(p, "\" is not available.", 19) == 0) {
1284                 p += 19;
1285             }
1286         } else if (strncmp(p, "The value of variable '", 23) == 0) {
1287             p += 23;
1288             skipName(p);
1289             const char* e = strchr(p, '.');
1290             if (e == 0) {
1291                 p += strlen(p);
1292             } else {
1293                 p = e+1;
1294             }
1295         } else {
1296             // must be an enumeration value
1297             skipName(p);
1298             // hmm, not necessarily: nan (floating point Not a Number)
1299             // is followed by a number in ()
1300             if (*p == '(')
1301                 skipNested(p, '(', ')');
1302         }
1303         variable->m_value += FROM_LATIN1(start, p - start);
1304
1305         // remove line breaks from the value; this is ok since
1306         // string values never contain a literal line break
1307         variable->m_value.replace('\n', ' ');
1308
1309         if (checkMultiPart) {
1310             // white space
1311             while (isspace(*p))
1312                 p++;
1313             // may be followed by a string or <...>
1314             start = p;
1315
1316             if (*p == '"' || *p == '\'') {
1317                 skipString(p);
1318             } else if (*p == '<') {
1319                 // if this value is part of an array, it might be followed
1320                 // by <repeats 15 times>, which we don't skip here
1321                 if (strncmp(p, "<repeats ", 9) != 0)
1322                     skipNestedAngles(p);
1323             }
1324             if (p != start) {
1325                 // there is always a blank before the string,
1326                 // which we will include in the final string value
1327                 variable->m_value += FROM_LATIN1(start-1, (p - start)+1);
1328                 // if this was a pointer, reset that flag since we
1329                 // now got the value
1330                 variable->m_varKind = VarTree::VKsimple;
1331             }
1332         }
1333
1334         if (variable->m_value.length() == 0) {
1335             TRACE("parse error: no value for " + variable->getText());
1336             return false;
1337         }
1338
1339         // final white space
1340         while (isspace(*p))
1341             p++;
1342         s = p;
1343
1344         /*
1345          * If this was a reference, the value follows. It might even be a
1346          * composite variable!
1347          */
1348         if (reference) {
1349             goto repeat;
1350         }
1351
1352         if (variable->m_varKind == VarTree::VKpointer) {
1353             variable->setDelayedExpanding(true);
1354         }
1355     }
1356
1357     return true;
1358 }
1359
1360 static bool parseNested(const char*& s, VarTree* variable)
1361 {
1362     // could be a structure or an array
1363     while (isspace(*s))
1364         s++;
1365
1366     const char* p = s;
1367     bool isStruct = false;
1368     /*
1369      * If there is a name followed by an = or an < -- which starts a type
1370      * name -- or "static", it is a structure
1371      */
1372     if (*p == '<' || *p == '}') {
1373         isStruct = true;
1374     } else if (strncmp(p, "static ", 7) == 0) {
1375         isStruct = true;
1376     } else if (isalpha(*p) || *p == '_' || *p == '$') {
1377         // look ahead for a comma after the name
1378         skipName(p);
1379         while (isspace(*p))
1380             p++;
1381         if (*p == '=') {
1382             isStruct = true;
1383         }
1384         p = s;                          /* rescan the name */
1385     }
1386     if (isStruct) {
1387         if (!parseVarSeq(p, variable)) {
1388             return false;
1389         }
1390         variable->m_varKind = VarTree::VKstruct;
1391     } else {
1392         if (!parseValueSeq(p, variable)) {
1393             return false;
1394         }
1395         variable->m_varKind = VarTree::VKarray;
1396     }
1397     s = p;
1398     return true;
1399 }
1400
1401 static bool parseVarSeq(const char*& s, VarTree* variable)
1402 {
1403     // parse a comma-separated sequence of variables
1404     VarTree* var = variable;            /* var != 0 to indicate success if empty seq */
1405     for (;;) {
1406         if (*s == '}')
1407             break;
1408         if (strncmp(s, "<No data fields>}", 17) == 0)
1409         {
1410             // no member variables, so break out immediately
1411             s += 16;                    /* go to the closing brace */
1412             break;
1413         }
1414         var = parseVar(s);
1415         if (var == 0)
1416             break;                      /* syntax error */
1417         variable->appendChild(var);
1418         if (*s != ',')
1419             break;
1420         // skip the comma and whitespace
1421         s++;
1422         while (isspace(*s))
1423             s++;
1424     }
1425     return var != 0;
1426 }
1427
1428 static bool parseValueSeq(const char*& s, VarTree* variable)
1429 {
1430     // parse a comma-separated sequence of variables
1431     int index = 0;
1432     bool good;
1433     for (;;) {
1434         QString name;
1435         name.sprintf("[%d]", index);
1436         VarTree* var = new VarTree(name, VarTree::NKplain);
1437         var->setDeleteChildren(true);
1438         good = parseValue(s, var);
1439         if (!good) {
1440             delete var;
1441             return false;
1442         }
1443         // a value may be followed by "<repeats 45 times>"
1444         if (strncmp(s, "<repeats ", 9) == 0) {
1445             s += 9;
1446             char* end;
1447             int l = strtol(s, &end, 10);
1448             if (end == s || strncmp(end, " times>", 7) != 0) {
1449                 // should not happen
1450                 delete var;
1451                 return false;
1452             }
1453             TRACE(QString().sprintf("found <repeats %d times> in array", l));
1454             // replace name and advance index
1455             name.sprintf("[%d .. %d]", index, index+l-1);
1456             var->setText(name);
1457             index += l;
1458             // skip " times>" and space
1459             s = end+7;
1460             // possible final space
1461             while (isspace(*s))
1462                 s++;
1463         } else {
1464             index++;
1465         }
1466         variable->appendChild(var);
1467         // long arrays may be terminated by '...'
1468         if (strncmp(s, "...", 3) == 0) {
1469             s += 3;
1470             VarTree* var = new VarTree("...", VarTree::NKplain);
1471             var->setDeleteChildren(true);
1472             var->m_value = i18n("<additional entries of the array suppressed>");
1473             variable->appendChild(var);
1474             break;
1475         }
1476         if (*s != ',') {
1477             break;
1478         }
1479         // skip the comma and whitespace
1480         s++;
1481         while (isspace(*s))
1482             s++;
1483         // sometimes there is a closing brace after a comma
1484 //      if (*s == '}')
1485 //          break;
1486     }
1487     return true;
1488 }
1489
1490 /**
1491  * Parses a stack frame.
1492  */
1493 static void parseFrameInfo(const char*& s, QString& func,
1494                            QString& file, int& lineNo, DbgAddr& address)
1495 {
1496     const char* p = s;
1497
1498     // next may be a hexadecimal address
1499     if (*p == '0') {
1500         const char* start = p;
1501         p++;
1502         if (*p == 'x')
1503             p++;
1504         while (isxdigit(*p))
1505             p++;
1506         address = FROM_LATIN1(start, p-start);
1507         if (strncmp(p, " in ", 4) == 0)
1508             p += 4;
1509     } else {
1510         address = DbgAddr();
1511     }
1512     const char* start = p;
1513     // check for special signal handler frame
1514     if (strncmp(p, "<signal handler called>", 23) == 0) {
1515         func = FROM_LATIN1(start, 23);
1516         file = QString();
1517         lineNo = -1;
1518         s = p+23;
1519         if (*s == '\n')
1520             s++;
1521         return;
1522     }
1523
1524     /*
1525      * Skip the function name. It is terminated by a left parenthesis
1526      * which does not delimit "(anonymous namespace)" and which is
1527      * outside the angle brackets <> of template parameter lists.
1528      */
1529     while (*p != '\0')
1530     {
1531         if (*p == '<') {
1532             // check for operator<< and operator<
1533             if (p-start >= 8 && strncmp(p-8, "operator", 8) == 0)
1534             {
1535                 p++;
1536                 if (*p == '<')
1537                     p++;
1538             }
1539             else
1540             {
1541                 // skip template parameter list
1542                 skipNestedAngles(p);
1543             }
1544         } else if (*p == '(') {
1545             if (strncmp(p, "(anonymous namespace)", 21) != 0)
1546                 break;  // parameter list found
1547             p += 21;
1548         } else {
1549             p++;
1550         }
1551     }
1552
1553     if (*p == '\0') {
1554         func = start;
1555         file = QString();
1556         lineNo = -1;
1557         s = p;
1558         return;
1559     }
1560     /*
1561      * Skip parameters. But notice that for complicated conversion
1562      * functions (eg. "operator int(**)()()", ie. convert to pointer to
1563      * pointer to function) as well as operator()(...) we have to skip
1564      * additional pairs of parentheses. Furthermore, recent gdbs write the
1565      * demangled name followed by the arguments in a pair of parentheses,
1566      * where the demangled name can end in "const".
1567      */
1568     do {
1569         skipNestedWithString(p, '(', ')');
1570         while (isspace(*p))
1571             p++;
1572         // skip "const"
1573         if (strncmp(p, "const", 5) == 0) {
1574             p += 5;
1575             while (isspace(*p))
1576                 p++;
1577         }
1578     } while (*p == '(');
1579
1580     // check for file position
1581     if (strncmp(p, "at ", 3) == 0) {
1582         p += 3;
1583         const char* fileStart = p;
1584         // go for the end of the line
1585         while (*p != '\0' && *p != '\n')
1586             p++;
1587         // search back for colon
1588         const char* colon = p;
1589         do {
1590             --colon;
1591         } while (*colon != ':');
1592         file = FROM_LATIN1(fileStart, colon-fileStart);
1593         lineNo = atoi(colon+1)-1;
1594         // skip new-line
1595         if (*p != '\0')
1596             p++;
1597     } else {
1598         // check for "from shared lib"
1599         if (strncmp(p, "from ", 5) == 0) {
1600             p += 5;
1601             // go for the end of the line
1602             while (*p != '\0' && *p != '\n')
1603                 p++;
1604             // skip new-line
1605             if (*p != '\0')
1606                 p++;
1607         }
1608         file = "";
1609         lineNo = -1;
1610     }
1611     // construct the function name (including file info)
1612     if (*p == '\0') {
1613         func = start;
1614     } else {
1615         func = FROM_LATIN1(start, p-start-1);   /* don't include \n */
1616     }
1617     s = p;
1618
1619     /*
1620      * Replace \n (and whitespace around it) in func by a blank. We cannot
1621      * use QString::simplifyWhiteSpace() for this because this would also
1622      * simplify space that belongs to a string arguments that gdb sometimes
1623      * prints in the argument lists of the function.
1624      */
1625     ASSERT(!isspace(func[0].latin1()));         /* there must be non-white before first \n */
1626     int nl = 0;
1627     while ((nl = func.find('\n', nl)) >= 0) {
1628         // search back to the beginning of the whitespace
1629         int startWhite = nl;
1630         do {
1631             --startWhite;
1632         } while (isspace(func[startWhite].latin1()));
1633         startWhite++;
1634         // search forward to the end of the whitespace
1635         do {
1636             nl++;
1637         } while (isspace(func[nl].latin1()));
1638         // replace
1639         func.replace(startWhite, nl-startWhite, " ");
1640         /* continue searching for more \n's at this place: */
1641         nl = startWhite+1;
1642     }
1643 }
1644
1645
1646 /**
1647  * Parses a stack frame including its frame number
1648  */
1649 static bool parseFrame(const char*& s, int& frameNo, QString& func,
1650                        QString& file, int& lineNo, DbgAddr& address)
1651 {
1652     // Example:
1653     //  #1  0x8048881 in Dl::Dl (this=0xbffff418, r=3214) at testfile.cpp:72
1654     //  Breakpoint 3, Cl::f(int) const (this=0xbffff3c0, x=17) at testfile.cpp:155
1655
1656     // must start with a hash mark followed by number
1657     // or with "Breakpoint " followed by number and comma
1658     if (s[0] == '#') {
1659         if (!isdigit(s[1]))
1660             return false;
1661         s++;                            /* skip the hash mark */
1662     } else if (strncmp(s, "Breakpoint ", 11) == 0) {
1663         if (!isdigit(s[11]))
1664             return false;
1665         s += 11;                        /* skip "Breakpoint" */
1666     } else
1667         return false;
1668
1669     // frame number
1670     frameNo = atoi(s);
1671     while (isdigit(*s))
1672         s++;
1673     // space and comma
1674     while (isspace(*s) || *s == ',')
1675         s++;
1676     parseFrameInfo(s, func, file, lineNo, address);
1677     return true;
1678 }
1679
1680 void GdbDriver::parseBackTrace(const char* output, QList<StackFrame>& stack)
1681 {
1682     QString func, file;
1683     int lineNo, frameNo;
1684     DbgAddr address;
1685
1686     while (::parseFrame(output, frameNo, func, file, lineNo, address)) {
1687         StackFrame* frm = new StackFrame;
1688         frm->frameNo = frameNo;
1689         frm->fileName = file;
1690         frm->lineNo = lineNo;
1691         frm->address = address;
1692         frm->var = new VarTree(func, VarTree::NKplain);
1693         stack.append(frm);
1694     }
1695 }
1696
1697 bool GdbDriver::parseFrameChange(const char* output, int& frameNo,
1698                                  QString& file, int& lineNo, DbgAddr& address)
1699 {
1700     QString func;
1701     return ::parseFrame(output, frameNo, func, file, lineNo, address);
1702 }
1703
1704
1705 bool GdbDriver::parseBreakList(const char* output, QList<Breakpoint>& brks)
1706 {
1707     // skip first line, which is the headline
1708     const char* p = strchr(output, '\n');
1709     if (p == 0)
1710         return false;
1711     p++;
1712     if (*p == '\0')
1713         return false;
1714
1715     // split up a line
1716     QString location;
1717     QString address;
1718     int hits = 0;
1719     uint ignoreCount = 0;
1720     QString condition;
1721     const char* end;
1722     char* dummy;
1723     while (*p != '\0') {
1724         // get Num
1725         long bpNum = strtol(p, &dummy, 10);     /* don't care about overflows */
1726         p = dummy;
1727         // get Type
1728         while (isspace(*p))
1729             p++;
1730         Breakpoint::Type bpType = Breakpoint::breakpoint;
1731         if (strncmp(p, "breakpoint", 10) == 0) {
1732             p += 10;
1733         } else if (strncmp(p, "hw watchpoint", 13) == 0) {
1734             bpType = Breakpoint::watchpoint;
1735             p += 13;
1736         } else if (strncmp(p, "watchpoint", 10) == 0) {
1737             bpType = Breakpoint::watchpoint;
1738             p += 10;
1739         }
1740         while (isspace(*p))
1741             p++;
1742         if (*p == '\0')
1743             break;
1744         // get Disp
1745         char disp = *p++;
1746         while (*p != '\0' && !isspace(*p))      /* "keep" or "del" */
1747             p++;
1748         while (isspace(*p))
1749             p++;
1750         if (*p == '\0')
1751             break;
1752         // get Enb
1753         char enable = *p++;
1754         while (*p != '\0' && !isspace(*p))      /* "y" or "n" */
1755             p++;
1756         while (isspace(*p))
1757             p++;
1758         if (*p == '\0')
1759             break;
1760         // the address, if present
1761         if (bpType == Breakpoint::breakpoint &&
1762             strncmp(p, "0x", 2) == 0)
1763         {
1764             const char* start = p;
1765             while (*p != '\0' && !isspace(*p))
1766                 p++;
1767             address = FROM_LATIN1(start, p-start);
1768             while (isspace(*p) && *p != '\n')
1769                 p++;
1770             if (*p == '\0')
1771                 break;
1772         } else {
1773             address = QString();
1774         }
1775         // remainder is location, hit and ignore count, condition
1776         hits = 0;
1777         ignoreCount = 0;
1778         condition = QString();
1779         end = strchr(p, '\n');
1780         if (end == 0) {
1781             location = p;
1782             p += location.length();
1783         } else {
1784             location = FROM_LATIN1(p, end-p).stripWhiteSpace();
1785             p = end+1;                  /* skip over \n */
1786         }
1787
1788         // may be continued in next line
1789         while (isspace(*p)) {   /* p points to beginning of line */
1790             // skip white space at beginning of line
1791             while (isspace(*p))
1792                 p++;
1793
1794             // seek end of line
1795             end = strchr(p, '\n');
1796             if (end == 0)
1797                 end = p+strlen(p);
1798
1799             if (strncmp(p, "breakpoint already hit", 22) == 0) {
1800                 // extract the hit count
1801                 p += 22;
1802                 hits = strtol(p, &dummy, 10);
1803                 TRACE(QString().sprintf("hit count %d", hits));
1804             } else if (strncmp(p, "stop only if ", 13) == 0) {
1805                 // extract condition
1806                 p += 13;
1807                 condition = FROM_LATIN1(p, end-p).stripWhiteSpace();
1808                 TRACE("condition: "+condition);
1809             } else if (strncmp(p, "ignore next ", 12) == 0) {
1810                 // extract ignore count
1811                 p += 12;
1812                 ignoreCount = strtol(p, &dummy, 10);
1813                 TRACE(QString().sprintf("ignore count %d", ignoreCount));
1814             } else {
1815                 // indeed a continuation
1816                 location += " " + FROM_LATIN1(p, end-p).stripWhiteSpace();
1817             }
1818             p = end;
1819             if (*p != '\0')
1820                 p++;                    /* skip '\n' */
1821         }
1822         Breakpoint* bp = new Breakpoint;
1823         bp->id = bpNum;
1824         bp->type = bpType;
1825         bp->temporary = disp == 'd';
1826         bp->enabled = enable == 'y';
1827         bp->location = location;
1828         bp->address = address;
1829         bp->hitCount = hits;
1830         bp->ignoreCount = ignoreCount;
1831         bp->condition = condition;
1832         brks.append(bp);
1833     }
1834     return true;
1835 }
1836
1837 bool GdbDriver::parseThreadList(const char* output, QList<ThreadInfo>& threads)
1838 {
1839     if (strcmp(output, "\n") == 0 || strncmp(output, "No stack.", 9) == 0) {
1840         // no threads
1841         return true;
1842     }
1843
1844     int id;
1845     QString systag;
1846     QString func, file;
1847     int lineNo;
1848     DbgAddr address;
1849
1850     const char* p = output;
1851     while (*p != '\0') {
1852         // seach look for thread id, watching out for  the focus indicator
1853         bool hasFocus = false;
1854         while (isspace(*p))             /* may be \n from prev line: see "No stack" below */
1855             p++;
1856         if (*p == '*') {
1857             hasFocus = true;
1858             p++;
1859             // there follows only whitespace
1860         }
1861         char* end;
1862         id = strtol(p, &end, 10);
1863         if (p == end) {
1864             // syntax error: no number found; bail out
1865             return true;
1866         }
1867         p = end;
1868
1869         // skip space
1870         while (isspace(*p))
1871             p++;
1872
1873         /*
1874          * Now follows the thread's SYSTAG. It is terminated by two blanks.
1875          */
1876         end = strstr(p, "  ");
1877         if (end == 0) {
1878             // syntax error; bail out
1879             return true;
1880         }
1881         systag = FROM_LATIN1(p, end-p);
1882         p = end+2;
1883
1884         /*
1885          * Now follows a standard stack frame. Sometimes, however, gdb
1886          * catches a thread at an instant where it doesn't have a stack.
1887          */
1888         if (strncmp(p, "[No stack.]", 11) != 0) {
1889             ::parseFrameInfo(p, func, file, lineNo, address);
1890         } else {
1891             func = "[No stack]";
1892             file = QString();
1893             lineNo = -1;
1894             address = QString();
1895             p += 11;                    /* \n is skipped above */
1896         }
1897
1898         ThreadInfo* thr = new ThreadInfo;
1899         thr->id = id;
1900         thr->threadName = systag;
1901         thr->hasFocus = hasFocus;
1902         thr->function = func;
1903         thr->fileName = file;
1904         thr->lineNo = lineNo;
1905         thr->address = address;
1906         threads.append(thr);
1907     }
1908     return true;
1909 }
1910
1911 static bool parseNewBreakpoint(const char* o, int& id,
1912                                QString& file, int& lineNo, QString& address);
1913 static bool parseNewWatchpoint(const char* o, int& id,
1914                                QString& expr);
1915
1916 bool GdbDriver::parseBreakpoint(const char* output, int& id,
1917                                 QString& file, int& lineNo, QString& address)
1918 {
1919     const char* o = output;
1920     // skip lines of that begin with "(Cannot find"
1921     while (strncmp(o, "(Cannot find", 12) == 0) {
1922         o = strchr(o, '\n');
1923         if (o == 0)
1924             return false;
1925         o++;                            /* skip newline */
1926     }
1927
1928     if (strncmp(o, "Breakpoint ", 11) == 0) {
1929         output += 11;                   /* skip "Breakpoint " */
1930         return ::parseNewBreakpoint(output, id, file, lineNo, address);
1931     } else if (strncmp(o, "Hardware watchpoint ", 20) == 0) {
1932         output += 20;
1933         return ::parseNewWatchpoint(output, id, address);
1934     } else if (strncmp(o, "Watchpoint ", 11) == 0) {
1935         output += 11;
1936         return ::parseNewWatchpoint(output, id, address);
1937     }
1938     return false;
1939 }
1940
1941 static bool parseNewBreakpoint(const char* o, int& id,
1942                                QString& file, int& lineNo, QString& address)
1943 {
1944     // breakpoint id
1945     char* p;
1946     id = strtoul(o, &p, 10);
1947     if (p == o)
1948         return false;
1949
1950     // check for the address
1951     if (strncmp(p, " at 0x", 6) == 0) {
1952         char* start = p+4;             /* skip " at ", but not 0x */
1953         p += 6;
1954         while (isxdigit(*p))
1955             ++p;
1956         address = FROM_LATIN1(start, p-start);
1957     }
1958
1959     // file name
1960     char* fileStart = strstr(p, "file ");
1961     if (fileStart == 0)
1962         return !address.isEmpty();     /* parse error only if there's no address */
1963     fileStart += 5;
1964
1965     // line number
1966     char* numStart = strstr(fileStart, ", line ");
1967     QString fileName = FROM_LATIN1(fileStart, numStart-fileStart);
1968     numStart += 7;
1969     int line = strtoul(numStart, &p, 10);
1970     if (numStart == p)
1971         return false;
1972
1973     file = fileName;
1974     lineNo = line-1;                    /* zero-based! */
1975     return true;
1976 }
1977
1978 static bool parseNewWatchpoint(const char* o, int& id,
1979                                QString& expr)
1980 {
1981     // watchpoint id
1982     char* p;
1983     id = strtoul(o, &p, 10);
1984     if (p == o)
1985         return false;
1986
1987     if (strncmp(p, ": ", 2) != 0)
1988         return false;
1989     p += 2;
1990
1991     // all the rest on the line is the expression
1992     expr = FROM_LATIN1(p, strlen(p)).stripWhiteSpace();
1993     return true;
1994 }
1995
1996 void GdbDriver::parseLocals(const char* output, QList<VarTree>& newVars)
1997 {
1998     // check for possible error conditions
1999     if (strncmp(output, "No symbol table", 15) == 0)
2000     {
2001         return;
2002     }
2003
2004     while (*output != '\0') {
2005         while (isspace(*output))
2006             output++;
2007         if (*output == '\0')
2008             break;
2009         // skip occurrences of "No locals" and "No args"
2010         if (strncmp(output, "No locals", 9) == 0 ||
2011             strncmp(output, "No arguments", 12) == 0)
2012         {
2013             output = strchr(output, '\n');
2014             if (output == 0) {
2015                 break;
2016             }
2017             continue;
2018         }
2019
2020         VarTree* variable = parseVar(output);
2021         if (variable == 0) {
2022             break;
2023         }
2024         // do not add duplicates
2025         for (VarTree* o = newVars.first(); o != 0; o = newVars.next()) {
2026             if (o->getText() == variable->getText()) {
2027                 delete variable;
2028                 goto skipDuplicate;
2029             }
2030         }
2031         newVars.append(variable);
2032     skipDuplicate:;
2033     }
2034 }
2035
2036 bool GdbDriver::parsePrintExpr(const char* output, bool wantErrorValue, VarTree*& var)
2037 {
2038     // check for error conditions
2039     if (parseErrorMessage(output, var, wantErrorValue))
2040     {
2041         return false;
2042     } else {
2043         // parse the variable
2044         var = parseVar(output);
2045         return true;
2046     }
2047 }
2048
2049 bool GdbDriver::parseChangeWD(const char* output, QString& message)
2050 {
2051     bool isGood = false;
2052     message = QString(output).simplifyWhiteSpace();
2053     if (message.isEmpty()) {
2054         message = i18n("New working directory: ") + m_programWD;
2055         isGood = true;
2056     }
2057     return isGood;
2058 }
2059
2060 bool GdbDriver::parseChangeExecutable(const char* output, QString& message)
2061 {
2062     message = output;
2063
2064     m_haveCoreFile = false;
2065
2066     /*
2067      * Lines starting with the following do not indicate errors:
2068      *     Using host libthread_db
2069      *     (no debugging symbols found)
2070      */
2071     while (strncmp(output, "Using host libthread_db", 23) == 0 ||
2072            strncmp(output, "(no debugging symbols found)", 28) == 0)
2073     {
2074         // this line is good, go to the next one
2075         const char* end = strchr(output, '\n');
2076         if (end == 0)
2077             output += strlen(output);
2078         else
2079             output = end+1;
2080     }
2081
2082     /*
2083      * If we've parsed all lines, there was no error.
2084      */
2085     return output[0] == '\0';
2086 }
2087
2088 bool GdbDriver::parseCoreFile(const char* output)
2089 {
2090     // if command succeeded, gdb emits a line starting with "#0 "
2091     m_haveCoreFile = strstr(output, "\n#0 ") != 0;
2092     return m_haveCoreFile;
2093 }
2094
2095 uint GdbDriver::parseProgramStopped(const char* output, QString& message)
2096 {
2097     // optionally: "program changed, rereading symbols",
2098     // followed by:
2099     // "Program exited normally"
2100     // "Program terminated with wignal SIGSEGV"
2101     // "Program received signal SIGINT" or other signal
2102     // "Breakpoint..."
2103
2104     // go through the output, line by line, checking what we have
2105     const char* start = output - 1;
2106     uint flags = SFprogramActive;
2107     message = QString();
2108     do {
2109         start++;                        /* skip '\n' */
2110
2111         if (strncmp(start, "Program ", 8) == 0 ||
2112             strncmp(start, "ptrace: ", 8) == 0) {
2113             /*
2114              * When we receive a signal, the program remains active.
2115              *
2116              * Special: If we "stopped" in a corefile, the string "Program
2117              * terminated with signal"... is displayed. (Normally, we see
2118              * "Program received signal"... when a signal happens.)
2119              */
2120             if (strncmp(start, "Program exited", 14) == 0 ||
2121                 (strncmp(start, "Program terminated", 18) == 0 && !m_haveCoreFile) ||
2122                 strncmp(start, "ptrace: ", 8) == 0)
2123             {
2124                 flags &= ~SFprogramActive;
2125             }
2126
2127             // set message
2128             const char* endOfMessage = strchr(start, '\n');
2129             if (endOfMessage == 0)
2130                 endOfMessage = start + strlen(start);
2131             message = FROM_LATIN1(start, endOfMessage-start);
2132         } else if (strncmp(start, "Breakpoint ", 11) == 0) {
2133             /*
2134              * We stopped at a (permanent) breakpoint (gdb doesn't tell us
2135              * that it stopped at a temporary breakpoint).
2136              */
2137             flags |= SFrefreshBreak;
2138         } else if (strstr(start, "re-reading symbols.") != 0) {
2139             flags |= SFrefreshSource;
2140         }
2141
2142         // next line, please
2143         start = strchr(start, '\n');
2144     } while (start != 0);
2145
2146     /*
2147      * Gdb only notices when new threads have appeared, but not when a
2148      * thread finishes. So we always have to assume that the list of
2149      * threads has changed.
2150      */
2151     flags |= SFrefreshThreads;
2152
2153     return flags;
2154 }
2155
2156 void GdbDriver::parseSharedLibs(const char* output, QStrList& shlibs)
2157 {
2158     if (strncmp(output, "No shared libraries loaded", 26) == 0)
2159         return;
2160
2161     // parse the table of shared libraries
2162
2163     // strip off head line
2164     output = strchr(output, '\n');
2165     if (output == 0)
2166         return;
2167     output++;                           /* skip '\n' */
2168     QString shlibName;
2169     while (*output != '\0') {
2170         // format of a line is
2171         // 0x404c5000  0x40580d90  Yes         /lib/libc.so.5
2172         // 3 blocks of non-space followed by space
2173         for (int i = 0; *output != '\0' && i < 3; i++) {
2174             while (*output != '\0' && !isspace(*output)) {      /* non-space */
2175                 output++;
2176             }
2177             while (isspace(*output)) {  /* space */
2178                 output++;
2179             }
2180         }
2181         if (*output == '\0')
2182             return;
2183         const char* start = output;
2184         output = strchr(output, '\n');
2185         if (output == 0)
2186             output = start + strlen(start);
2187         shlibName = FROM_LATIN1(start, output-start);
2188         if (*output != '\0')
2189             output++;
2190         shlibs.append(shlibName);
2191         TRACE("found shared lib " + shlibName);
2192     }
2193 }
2194
2195 bool GdbDriver::parseFindType(const char* output, QString& type)
2196 {
2197     if (strncmp(output, "type = ", 7) != 0)
2198         return false;
2199
2200     /*
2201      * Everything else is the type. We strip off any leading "const" and any
2202      * trailing "&" on the grounds that neither affects the decoding of the
2203      * object. We also strip off all white-space from the type.
2204      */
2205     output += 7;
2206     if (strncmp(output, "const ", 6) == 0)
2207         output += 6;
2208     type = output;
2209     type.replace(QRegExp("\\s+"), "");
2210     if (type.endsWith("&"))
2211         type.truncate(type.length() - 1);
2212     return true;
2213 }
2214
2215 void GdbDriver::parseRegisters(const char* output, QList<RegisterInfo>& regs)
2216 {
2217     if (strncmp(output, "The program has no registers now", 32) == 0) {
2218         return;
2219     }
2220
2221     QString regName;
2222     QString value;
2223
2224     // parse register values
2225     while (*output != '\0')
2226     {
2227         // skip space at the start of the line
2228         while (isspace(*output))
2229             output++;
2230
2231         // register name
2232         const char* start = output;
2233         while (*output != '\0' && !isspace(*output))
2234             output++;
2235         if (*output == '\0')
2236             break;
2237         regName = FROM_LATIN1(start, output-start);
2238
2239         // skip space
2240         while (isspace(*output))
2241             output++;
2242
2243         RegisterInfo* reg = new RegisterInfo;
2244         reg->regName = regName;
2245
2246         /*
2247          * If we find a brace now, this is a vector register. We look for
2248          * the closing brace and treat the result as cooked value.
2249          */
2250         if (*output == '{')
2251         {
2252             start = output;
2253             skipNested(output, '{', '}');
2254             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2255             // skip space, but not the end of line
2256             while (isspace(*output) && *output != '\n')
2257                 output++;
2258             // get rid of the braces at the begining and the end
2259             value.remove(0, 1);
2260             if (value[value.length()-1] == '}') {
2261                 value = value.left(value.length()-1);
2262             }
2263             // gdb 5.3 doesn't print a separate set of raw values
2264             if (*output == '{') {
2265                 // another set of vector follows
2266                 // what we have so far is the raw value
2267                 reg->rawValue = value;
2268
2269                 start = output;
2270                 skipNested(output, '{', '}');
2271                 value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2272             } else {
2273                 // for gdb 5.3
2274                 // find first type that does not have an array, this is the RAW value
2275                 const char* end=start;
2276                 findEnd(end);
2277                 const char* cur=start;
2278                 while (cur<end) {
2279                     while (*cur != '=' && cur<end)
2280                         cur++;
2281                     cur++;
2282                     while (isspace(*cur) && cur<end)
2283                         cur++;
2284                     if (isNumberish(*cur)) {
2285                         end=cur;
2286                         while (*end && (*end!='}') && (*end!=',') && (*end!='\n'))
2287                             end++;
2288                         QString rawValue = FROM_LATIN1(cur, end-cur).simplifyWhiteSpace();
2289                         reg->rawValue = rawValue;
2290
2291                         if (rawValue.left(2)=="0x") {
2292                             // ok we have a raw value, now get it's type
2293                             end=cur-1;
2294                             while (isspace(*end) || *end=='=') end--;
2295                             end++;
2296                             cur=end-1;
2297                             while (*cur!='{' && *cur!=' ')
2298                                 cur--;
2299                             cur++;
2300                             reg->type=FROM_LATIN1(cur, end-cur);
2301                         }
2302
2303                         // end while loop
2304                         cur=end;
2305                     }
2306                 }
2307                 // skip to the end of line
2308                 while (*output != '\0' && *output != '\n')
2309                     output++;
2310                 // get rid of the braces at the begining and the end
2311                 value.remove(0, 1);
2312                 if (value[value.length()-1] == '}') {
2313                     value = value.left(value.length()-1);
2314                 }
2315             }
2316             reg->cookedValue = value;
2317         }
2318         else
2319         {
2320             // the rest of the line is the register value
2321             start = output;
2322             output = strchr(output,'\n');
2323             if (output == 0)
2324                 output = start + strlen(start);
2325             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2326
2327             /*
2328              * We split the raw from the cooked values.
2329              * Some modern gdbs explicitly say: "0.1234 (raw 0x3e4567...)".
2330              * Here, the cooked value comes first, and the raw value is in
2331              * the second part.
2332              */
2333             int pos = value.find(" (raw ");
2334             if (pos >= 0)
2335             {
2336                 reg->cookedValue = value.left(pos);
2337                 reg->rawValue = value.mid(pos+6);
2338                 if (reg->rawValue.right(1) == ")")      // remove closing bracket
2339                     reg->rawValue.truncate(reg->rawValue.length()-1);
2340             }
2341             else
2342             {
2343                 /*
2344                 * In other cases we split off the first token (separated by
2345                 * whitespace). It is the raw value. The remainder of the line
2346                 * is the cooked value.
2347                 */
2348                 int pos = value.find(' ');
2349                 if (pos < 0) {
2350                     reg->rawValue = value;
2351                     reg->cookedValue = QString();
2352                 } else {
2353                     reg->rawValue = value.left(pos);
2354                     reg->cookedValue = value.mid(pos+1);
2355                 }
2356             }
2357         }
2358         if (*output != '\0')
2359             output++;                   /* skip '\n' */
2360
2361         regs.append(reg);
2362     }
2363 }
2364
2365 bool GdbDriver::parseInfoLine(const char* output, QString& addrFrom, QString& addrTo)
2366 {
2367     // "is at address" or "starts at address"
2368     const char* start = strstr(output, "s at address ");
2369     if (start == 0)
2370         return false;
2371
2372     start += 13;
2373     const char* p = start;
2374     while (*p != '\0' && !isspace(*p))
2375         p++;
2376     addrFrom = FROM_LATIN1(start, p-start);
2377
2378     start = strstr(p, "and ends at ");
2379     if (start == 0) {
2380         addrTo = addrFrom;
2381         return true;
2382     }
2383
2384     start += 12;
2385     p = start;
2386     while (*p != '\0' && !isspace(*p))
2387         p++;
2388     addrTo = FROM_LATIN1(start, p-start);
2389
2390     return true;
2391 }
2392
2393 void GdbDriver::parseDisassemble(const char* output, QList<DisassembledCode>& code)
2394 {
2395     code.clear();
2396
2397     if (strncmp(output, "Dump of assembler", 17) != 0) {
2398         // error message?
2399         DisassembledCode c;
2400         c.code = output;
2401         code.append(new DisassembledCode(c));
2402         return;
2403     }
2404
2405     // remove first line
2406     const char* p = strchr(output, '\n');
2407     if (p == 0)
2408         return;                         /* not a regular output */
2409
2410     p++;
2411
2412     // remove last line
2413     const char* end = strstr(output, "End of assembler");
2414     if (end == 0)
2415         end = p + strlen(p);
2416
2417     DbgAddr address;
2418
2419     // remove function offsets from the lines
2420     while (p != end)
2421     {
2422         const char* start = p;
2423         // address
2424         while (p != end && !isspace(*p))
2425             p++;
2426         address = FROM_LATIN1(start, p-start);
2427
2428         // function name (enclosed in '<>', followed by ':')
2429         while (p != end && *p != '<')
2430             p++;
2431         if (*p == '<')
2432             skipNestedAngles(p);
2433         if (*p == ':')
2434             p++;
2435
2436         // space until code
2437         while (p != end && isspace(*p))
2438             p++;
2439
2440         // code until end of line
2441         start = p;
2442         while (p != end && *p != '\n')
2443             p++;
2444         if (p != end)                   /* include '\n' */
2445             p++;
2446
2447         DisassembledCode* c = new DisassembledCode;
2448         c->address = address;
2449         c->code = FROM_LATIN1(start, p-start);
2450         code.append(c);
2451     }
2452 }
2453
2454 QString GdbDriver::parseMemoryDump(const char* output, QList<MemoryDump>& memdump)
2455 {
2456     if (isErrorExpr(output)) {
2457         // error; strip space
2458         QString msg = output;
2459         return msg.stripWhiteSpace();
2460     }
2461
2462     const char* p = output;             /* save typing */
2463     DbgAddr addr;
2464     QString dump;
2465
2466     // the address
2467     while (*p != 0) {
2468         const char* start = p;
2469         while (*p != '\0' && *p != ':' && !isspace(*p))
2470             p++;
2471         addr = FROM_LATIN1(start, p-start);
2472         if (*p != ':') {
2473             // parse function offset
2474             while (isspace(*p))
2475                 p++;
2476             start = p;
2477             while (*p != '\0' && !(*p == ':' && isspace(p[1])))
2478                 p++;
2479             addr.fnoffs = FROM_LATIN1(start, p-start);
2480         }
2481         if (*p == ':')
2482             p++;
2483         // skip space; this may skip a new-line char!
2484         while (isspace(*p))
2485             p++;
2486         // everything to the end of the line is the memory dump
2487         const char* end = strchr(p, '\n');
2488         if (end != 0) {
2489             dump = FROM_LATIN1(p, end-p);
2490             p = end+1;
2491         } else {
2492             dump = FROM_LATIN1(p, strlen(p));
2493             p += strlen(p);
2494         }
2495         MemoryDump* md = new MemoryDump;
2496         md->address = addr;
2497         md->dump = dump;
2498         memdump.append(md);
2499     }
2500
2501     return QString();
2502 }
2503
2504 QString GdbDriver::editableValue(VarTree* value)
2505 {
2506     const char* s = value->m_value.latin1();
2507
2508     // if the variable is a pointer value that contains a cast,
2509     // remove the cast
2510     if (*s == '(') {
2511         skipNested(s, '(', ')');
2512         // skip space
2513         while (isspace(*s))
2514             ++s;
2515     }
2516
2517 repeat:
2518     const char* start = s;
2519
2520     if (strncmp(s, "0x", 2) == 0)
2521     {
2522         s += 2;
2523         while (isxdigit(*s))
2524             ++s;
2525
2526         /*
2527          * What we saw so far might have been a reference. If so, edit the
2528          * referenced value. Otherwise, edit the pointer.
2529          */
2530         if (*s == ':') {
2531             // a reference
2532             ++s;
2533             goto repeat;
2534         }
2535         // a pointer
2536         // if it's a pointer to a string, remove the string
2537         const char* end = s;
2538         while (isspace(*s))
2539             ++s;
2540         if (*s == '"') {
2541             // a string
2542             return FROM_LATIN1(start, end-start);
2543         } else {
2544             // other pointer
2545             return FROM_LATIN1(start, strlen(start));
2546         }
2547     }
2548
2549     // else leave it unchanged (or stripped of the reference preamble)
2550     return s;
2551 }
2552
2553 QString GdbDriver::parseSetVariable(const char* output)
2554 {
2555     // if there is any output, it is an error message
2556     QString msg = output;
2557     return msg.stripWhiteSpace();
2558 }
2559
2560
2561 #include "gdbdriver.moc"