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 static const char printQStringStructFmt[] =
  49                 // if the string data is junk, fail early
  50                 "print ($qstrunicode=($qstrdata=(%s))->unicode)?"
  51                 // print an array of shorts
  52                 "(*(unsigned short*)$qstrunicode)@"
  53                 // limit the length
  54                 "(($qstrlen=(unsigned int)($qstrdata->len))>100?100:$qstrlen)"
  55                 // if unicode data is 0, check if it is QString::null
  56                 ":($qstrdata==QString::null.d)\n";
  57
  58 // However, gdb can't always find QString::null (I don't know why)
  59 // which results in an error; we autodetect this situation in
  60 // parseQt2QStrings and revert to a safe expression.
  61 // Same as above except for last line:
  62 static const char printQStringStructNoNullFmt[] =
  63                 "print ($qstrunicode=($qstrdata=(%s))->unicode)?"
  64                 "(*(unsigned short*)$qstrunicode)@"
  65                 "(($qstrlen=(unsigned int)($qstrdata->len))>100?100:$qstrlen)"
  66                 ":1==0\n";
  67
  68 /*
  69  * The following array of commands must be sorted by the DC* values,
  70  * because they are used as indices.
  71  */
  72 static GdbCmdInfo cmds[] = {
  73     { DCinitialize, "", GdbCmdInfo::argNone },
  74     { DCtty, "tty %s\n", GdbCmdInfo::argString },
  75     { DCexecutable, "file \"%s\"\n", GdbCmdInfo::argString },
  76     { DCtargetremote, "target remote %s\n", GdbCmdInfo::argString },
  77     { DCcorefile, "core-file %s\n", GdbCmdInfo::argString },
  78     { DCattach, "attach %s\n", GdbCmdInfo::argString },
  79     { DCinfolinemain, "info line main\n", GdbCmdInfo::argNone },
  80     { DCinfolocals, "kdbg__alllocals\n", GdbCmdInfo::argNone },
  81     { DCinforegisters, "info all-registers\n", GdbCmdInfo::argNone},
  82     { DCexamine, "x %s %s\n", GdbCmdInfo::argString2 },
  83     { DCinfoline, "info line %s:%d\n", GdbCmdInfo::argStringNum },
  84     { DCdisassemble, "disassemble %s %s\n", GdbCmdInfo::argString2 },
  85     { DCsetargs, "set args %s\n", GdbCmdInfo::argString },
  86     { DCsetenv, "set env %s %s\n", GdbCmdInfo::argString2 },
  87     { DCunsetenv, "unset env %s\n", GdbCmdInfo::argString },
  88     { DCsetoption, "setoption %s %d\n", GdbCmdInfo::argStringNum},
  89     { DCcd, "cd %s\n", GdbCmdInfo::argString },
  90     { DCbt, "bt\n", GdbCmdInfo::argNone },
  91     { DCrun, "run\n", GdbCmdInfo::argNone },
  92     { DCcont, "cont\n", GdbCmdInfo::argNone },
  93     { DCstep, "step\n", GdbCmdInfo::argNone },
  94     { DCstepi, "stepi\n", GdbCmdInfo::argNone },
  95     { DCnext, "next\n", GdbCmdInfo::argNone },
  96     { DCnexti, "nexti\n", GdbCmdInfo::argNone },
  97     { DCfinish, "finish\n", GdbCmdInfo::argNone },
  98     { DCuntil, "until %s:%d\n", GdbCmdInfo::argStringNum },
  99     { DCkill, "kill\n", GdbCmdInfo::argNone },
 100     { DCbreaktext, "break %s\n", GdbCmdInfo::argString },
 101     { DCbreakline, "break %s:%d\n", GdbCmdInfo::argStringNum },
 102     { DCtbreakline, "tbreak %s:%d\n", GdbCmdInfo::argStringNum },
 103     { DCbreakaddr, "break *%s\n", GdbCmdInfo::argString },
 104     { DCtbreakaddr, "tbreak *%s\n", GdbCmdInfo::argString },
 105     { DCwatchpoint, "watch %s\n", GdbCmdInfo::argString },
 106     { DCdelete, "delete %d\n", GdbCmdInfo::argNum },
 107     { DCenable, "enable %d\n", GdbCmdInfo::argNum },
 108     { DCdisable, "disable %d\n", GdbCmdInfo::argNum },
 109     { DCprint, "print %s\n", GdbCmdInfo::argString },
 110     { DCprintDeref, "print *(%s)\n", GdbCmdInfo::argString },
 111     { DCprintStruct, "print %s\n", GdbCmdInfo::argString },
 112     { DCprintQStringStruct, printQStringStructFmt, GdbCmdInfo::argString},
 113     { DCframe, "frame %d\n", GdbCmdInfo::argNum },
 114     { DCfindType, "whatis %s\n", GdbCmdInfo::argString },
 115     { DCinfosharedlib, "info sharedlibrary\n", GdbCmdInfo::argNone },
 116     { DCthread, "thread %d\n", GdbCmdInfo::argNum },
 117     { DCinfothreads, "info threads\n", GdbCmdInfo::argNone },
 118     { DCinfobreak, "info breakpoints\n", GdbCmdInfo::argNone },
 119     { DCcondition, "condition %d %s\n", GdbCmdInfo::argNumString},
 120     { DCsetpc, "set variable $pc=%s\n", GdbCmdInfo::argString },
 121     { DCignore, "ignore %d %d\n", GdbCmdInfo::argNum2},
 122     { DCsetvariable, "set variable %s=%s\n", GdbCmdInfo::argString2 },
 123 };
 124
 125 #define NUM_CMDS (int(sizeof(cmds)/sizeof(cmds[0])))
 126 #define MAX_FMTLEN 200
 127
 128 GdbDriver::GdbDriver() :
 129         DebuggerDriver(),
 130         m_gdbMajor(4), m_gdbMinor(16)
 131 {
 132     strcpy(m_prompt, PROMPT);
 133     m_promptMinLen = PROMPT_LEN;
 134     m_promptLastChar = PROMPT_LAST_CHAR;
 135
 136 #ifndef NDEBUG
 137     // check command info array
 138     char* perc;
 139     for (int i = 0; i < NUM_CMDS; i++) {
 140         // must be indexable by DbgCommand values, i.e. sorted by DbgCommand values
 141         assert(i == cmds[i].cmd);
 142         // a format string must be associated
 143         assert(cmds[i].fmt != 0);
 144         assert(strlen(cmds[i].fmt) <= MAX_FMTLEN);
 145         // format string must match arg specification
 146         switch (cmds[i].argsNeeded) {
 147         case GdbCmdInfo::argNone:
 148             assert(strchr(cmds[i].fmt, '%') == 0);
 149             break;
 150         case GdbCmdInfo::argString:
 151             perc = strchr(cmds[i].fmt, '%');
 152             assert(perc != 0 && perc[1] == 's');
 153             assert(strchr(perc+2, '%') == 0);
 154             break;
 155         case GdbCmdInfo::argNum:
 156             perc = strchr(cmds[i].fmt, '%');
 157             assert(perc != 0 && perc[1] == 'd');
 158             assert(strchr(perc+2, '%') == 0);
 159             break;
 160         case GdbCmdInfo::argStringNum:
 161             perc = strchr(cmds[i].fmt, '%');
 162             assert(perc != 0 && perc[1] == 's');
 163             perc = strchr(perc+2, '%');
 164             assert(perc != 0 && perc[1] == 'd');
 165             assert(strchr(perc+2, '%') == 0);
 166             break;
 167         case GdbCmdInfo::argNumString:
 168             perc = strchr(cmds[i].fmt, '%');
 169             assert(perc != 0 && perc[1] == 'd');
 170             perc = strchr(perc+2, '%');
 171             assert(perc != 0 && perc[1] == 's');
 172             assert(strchr(perc+2, '%') == 0);
 173             break;
 174         case GdbCmdInfo::argString2:
 175             perc = strchr(cmds[i].fmt, '%');
 176             assert(perc != 0 && perc[1] == 's');
 177             perc = strchr(perc+2, '%');
 178             assert(perc != 0 && perc[1] == 's');
 179             assert(strchr(perc+2, '%') == 0);
 180             break;
 181         case GdbCmdInfo::argNum2:
 182             perc = strchr(cmds[i].fmt, '%');
 183             assert(perc != 0 && perc[1] == 'd');
 184             perc = strchr(perc+2, '%');
 185             assert(perc != 0 && perc[1] == 'd');
 186             assert(strchr(perc+2, '%') == 0);
 187             break;
 188         }
 189     }
 190     assert(strlen(printQStringStructFmt) <= MAX_FMTLEN);
 191     assert(strlen(printQStringStructNoNullFmt) <= MAX_FMTLEN);
 192 #endif
 193 }
 194
 195 GdbDriver::~GdbDriver()
 196 {
 197 }
 198
 199
 200 QString GdbDriver::driverName() const
 201 {
 202     return "GDB";
 203 }
 204
 205 QString GdbDriver::defaultGdb()
 206 {
 207     return
 208         "gdb"
 209         " --fullname"   /* to get standard file names each time the prog stops */
 210         " --nx";        /* do not execute initialization files */
 211 }
 212
 213 QString GdbDriver::defaultInvocation() const
 214 {
 215     if (m_defaultCmd.isEmpty()) {
 216         return defaultGdb();
 217     } else {
 218         return m_defaultCmd;
 219     }
 220 }
 221
 222 QStringList GdbDriver::boolOptionList() const
 223 {
 224     // no options
 225     return QStringList();
 226 }
 227
 228 bool GdbDriver::startup(QString cmdStr)
 229 {
 230     if (!DebuggerDriver::startup(cmdStr))
 231         return false;
 232
 233     static const char gdbInitialize[] =
 234         /*
 235          * Work around buggy gdbs that do command line editing even if they
 236          * are not on a tty. The readline library echos every command back
 237          * in this case, which is confusing for us.
 238          */
 239         "set editing off\n"
 240         "set confirm off\n"
 241         "set print static-members off\n"
 242         "set print asm-demangle 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         // change prompt string and synchronize with gdb
 252         "set prompt " PROMPT "\n"
 253         ;
 254
 255     executeCmdString(DCinitialize, gdbInitialize, false);
 256
 257     // assume that QString::null is ok
 258     cmds[DCprintQStringStruct].fmt = printQStringStructFmt;
 259
 260     return true;
 261 }
 262
 263 void GdbDriver::commandFinished(CmdQueueItem* cmd)
 264 {
 265     // command string must be committed
 266     if (!cmd->m_committed) {
 267         // not commited!
 268         TRACE("calling " + (__PRETTY_FUNCTION__ + (" with uncommited command:\n\t" +
 269               cmd->m_cmdString)));
 270         return;
 271     }
 272
 273     switch (cmd->m_cmd) {
 274     case DCinitialize:
 275         // get version number from preamble
 276         {
 277             int len;
 278             QRegExp GDBVersion("\\nGDB [0-9]+\\.[0-9]+");
 279             int offset = GDBVersion.match(m_output, 0, &len);
 280             if (offset >= 0) {
 281                 char* start = m_output + offset + 5;    // skip "\nGDB "
 282                 char* end;
 283                 m_gdbMajor = strtol(start, &end, 10);
 284                 m_gdbMinor = strtol(end + 1, 0, 10);    // skip "."
 285                 if (start == end) {
 286                     // nothing was parsed
 287                     m_gdbMajor = 4;
 288                     m_gdbMinor = 16;
 289                 }
 290             } else {
 291                 // assume some default version (what would make sense?)
 292                 m_gdbMajor = 4;
 293                 m_gdbMinor = 16;
 294             }
 295             // use a feasible core-file command
 296             if (m_gdbMajor > 4 || (m_gdbMajor == 4 && m_gdbMinor >= 16)) {
 297                 cmds[DCcorefile].fmt = "target core %s\n";
 298             } else {
 299                 cmds[DCcorefile].fmt = "core-file %s\n";
 300             }
 301         }
 302         break;
 303     default:;
 304     }
 305
 306     /* ok, the command is ready */
 307     emit commandReceived(cmd, m_output);
 308
 309     switch (cmd->m_cmd) {
 310     case DCcorefile:
 311     case DCinfolinemain:
 312     case DCframe:
 313     case DCattach:
 314     case DCrun:
 315     case DCcont:
 316     case DCstep:
 317     case DCstepi:
 318     case DCnext:
 319     case DCnexti:
 320     case DCfinish:
 321     case DCuntil:
 322         parseMarker();
 323     default:;
 324     }
 325 }
 326
 327 /*
 328  * The --fullname option makes gdb send a special normalized sequence print
 329  * each time the program stops and at some other points. The sequence has
 330  * the form "\032\032filename:lineno:charoffset:(beg|middle):address".
 331  */
 332 void GdbDriver::parseMarker()
 333 {
 334     char* startMarker = strstr(m_output, "\032\032");
 335     if (startMarker == 0)
 336         return;
 337
 338     // extract the marker
 339     startMarker += 2;
 340     TRACE(QString("found marker: ") + startMarker);
 341     char* endMarker = strchr(startMarker, '\n');
 342     if (endMarker == 0)
 343         return;
 344
 345     *endMarker = '\0';
 346
 347     // extract filename and line number
 348     static QRegExp MarkerRE(":[0-9]+:[0-9]+:[begmidl]+:0x");
 349
 350     int len;
 351     int lineNoStart = MarkerRE.match(startMarker, 0, &len);
 352     if (lineNoStart >= 0) {
 353         int lineNo = atoi(startMarker + lineNoStart+1);
 354
 355         // get address
 356         const char* addrStart = startMarker + lineNoStart + len - 2;
 357         DbgAddr address = QString(addrStart).stripWhiteSpace();
 358
 359         // now show the window
 360         startMarker[lineNoStart] = '\0';   /* split off file name */
 361         emit activateFileLine(startMarker, lineNo-1, address);
 362     }
 363 }
 364
 365
 366 /*
 367  * Escapes characters that might lead to problems when they appear on gdb's
 368  * command line.
 369  */
 370 static void normalizeStringArg(QString& arg)
 371 {
 372     /*
 373      * Remove trailing backslashes. This approach is a little simplistic,
 374      * but we know that there is at the moment no case where a trailing
 375      * backslash would make sense.
 376      */
 377     while (!arg.isEmpty() && arg[arg.length()-1] == '\\') {
 378         arg = arg.left(arg.length()-1);
 379     }
 380 }
 381
 382
 383 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg)
 384 {
 385     assert(cmd >= 0 && cmd < NUM_CMDS);
 386     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString);
 387
 388     normalizeStringArg(strArg);
 389
 390     if (cmd == DCcd) {
 391         // need the working directory when parsing the output
 392         m_programWD = strArg;
 393     } else if (cmd == DCsetargs) {
 394         // attach saved redirection
 395         strArg += m_redirect;
 396     }
 397
 398     SIZED_QString(cmdString, MAX_FMTLEN+strArg.length());
 399     cmdString.sprintf(cmds[cmd].fmt, strArg.latin1());
 400     return cmdString;
 401 }
 402
 403 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg)
 404 {
 405     assert(cmd >= 0 && cmd < NUM_CMDS);
 406     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum);
 407
 408     SIZED_QString(cmdString, MAX_FMTLEN+30);
 409
 410     cmdString.sprintf(cmds[cmd].fmt, intArg);
 411     return cmdString;
 412 }
 413
 414 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg, int intArg)
 415 {
 416     assert(cmd >= 0 && cmd < NUM_CMDS);
 417     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum ||
 418            cmds[cmd].argsNeeded == GdbCmdInfo::argNumString ||
 419            cmd == DCexamine ||
 420            cmd == DCtty);
 421
 422     normalizeStringArg(strArg);
 423
 424     SIZED_QString(cmdString, MAX_FMTLEN+30+strArg.length());
 425
 426     if (cmd == DCtty)
 427     {
 428         /*
 429          * intArg specifies which channels should be redirected to
 430          * /dev/null. It is a value or'ed together from RDNstdin,
 431          * RDNstdout, RDNstderr. We store the value for a later DCsetargs
 432          * command.
 433          *
 434          * Note: We rely on that after the DCtty a DCsetargs will follow,
 435          * which will ultimately apply the redirection.
 436          */
 437         static const char* const runRedir[8] = {
 438             "",
 439             " </dev/null",
 440             " >/dev/null",
 441             " </dev/null >/dev/null",
 442             " 2>/dev/null",
 443             " </dev/null 2>/dev/null",
 444             " >/dev/null 2>&1",
 445             " </dev/null >/dev/null 2>&1"
 446         };
 447         if (strArg.isEmpty())
 448             intArg = 7;                 /* failsafe if no tty */
 449         m_redirect = runRedir[intArg & 7];
 450
 451         return makeCmdString(DCtty, strArg);   /* note: no problem if strArg empty */
 452     }
 453
 454     if (cmd == DCexamine) {
 455         // make a format specifier from the intArg
 456         static const char size[16] = {
 457             '\0', 'b', 'h', 'w', 'g'
 458         };
 459         static const char format[16] = {
 460             '\0', 'x', 'd', 'u', 'o', 't',
 461             'a',  'c', 'f', 's', 'i'
 462         };
 463         assert(MDTsizemask == 0xf);     /* lowest 4 bits */
 464         assert(MDTformatmask == 0xf0);  /* next 4 bits */
 465         int count = 16;                 /* number of entities to print */
 466         char sizeSpec = size[intArg & MDTsizemask];
 467         char formatSpec = format[(intArg & MDTformatmask) >> 4];
 468         assert(sizeSpec != '\0');
 469         assert(formatSpec != '\0');
 470         // adjust count such that 16 lines are printed
 471         switch (intArg & MDTformatmask) {
 472         case MDTstring: case MDTinsn:
 473             break;                      /* no modification needed */
 474         default:
 475             // all cases drop through:
 476             switch (intArg & MDTsizemask) {
 477             case MDTbyte:
 478             case MDThalfword:
 479                 count *= 2;
 480             case MDTword:
 481                 count *= 2;
 482             case MDTgiantword:
 483                 count *= 2;
 484             }
 485             break;
 486         }
 487         QString spec;
 488         spec.sprintf("/%d%c%c", count, sizeSpec, formatSpec);
 489
 490         return makeCmdString(DCexamine, spec, strArg);
 491     }
 492
 493     if (cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum)
 494     {
 495         // line numbers are zero-based
 496         if (cmd == DCuntil || cmd == DCbreakline ||
 497             cmd == DCtbreakline || cmd == DCinfoline)
 498         {
 499             intArg++;
 500         }
 501         if (cmd == DCinfoline)
 502         {
 503             // must split off file name part
 504             int slash = strArg.findRev('/');
 505             if (slash >= 0)
 506                 strArg = strArg.right(strArg.length()-slash-1);
 507         }
 508         cmdString.sprintf(cmds[cmd].fmt, strArg.latin1(), intArg);
 509     }
 510     else
 511     {
 512         cmdString.sprintf(cmds[cmd].fmt, intArg, strArg.latin1());
 513     }
 514     return cmdString;
 515 }
 516
 517 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg1, QString strArg2)
 518 {
 519     assert(cmd >= 0 && cmd < NUM_CMDS);
 520     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString2);
 521
 522     normalizeStringArg(strArg1);
 523     normalizeStringArg(strArg2);
 524
 525     SIZED_QString(cmdString, MAX_FMTLEN+strArg1.length()+strArg2.length());
 526     cmdString.sprintf(cmds[cmd].fmt, strArg1.latin1(), strArg2.latin1());
 527     return cmdString;
 528 }
 529
 530 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg1, int intArg2)
 531 {
 532     assert(cmd >= 0 && cmd < NUM_CMDS);
 533     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum2);
 534
 535     SIZED_QString(cmdString, MAX_FMTLEN+60);
 536     cmdString.sprintf(cmds[cmd].fmt, intArg1, intArg2);
 537     return cmdString;
 538 }
 539
 540 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, bool clearLow)
 541 {
 542     assert(cmd >= 0 && cmd < NUM_CMDS);
 543     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNone);
 544
 545     if (cmd == DCrun) {
 546         m_haveCoreFile = false;
 547     }
 548
 549     return executeCmdString(cmd, cmds[cmd].fmt, clearLow);
 550 }
 551
 552 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg,
 553                                     bool clearLow)
 554 {
 555     return executeCmdString(cmd, makeCmdString(cmd, strArg), clearLow);
 556 }
 557
 558 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg,
 559                                     bool clearLow)
 560 {
 561
 562     return executeCmdString(cmd, makeCmdString(cmd, intArg), clearLow);
 563 }
 564
 565 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg, int intArg,
 566                                     bool clearLow)
 567 {
 568     return executeCmdString(cmd, makeCmdString(cmd, strArg, intArg), clearLow);
 569 }
 570
 571 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 572                                     bool clearLow)
 573 {
 574     return executeCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), clearLow);
 575 }
 576
 577 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg1, int intArg2,
 578                                     bool clearLow)
 579 {
 580     return executeCmdString(cmd, makeCmdString(cmd, intArg1, intArg2), clearLow);
 581 }
 582
 583 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QueueMode mode)
 584 {
 585     return queueCmdString(cmd, cmds[cmd].fmt, mode);
 586 }
 587
 588 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg,
 589                                   QueueMode mode)
 590 {
 591     return queueCmdString(cmd, makeCmdString(cmd, strArg), mode);
 592 }
 593
 594 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, int intArg,
 595                                   QueueMode mode)
 596 {
 597     return queueCmdString(cmd, makeCmdString(cmd, intArg), mode);
 598 }
 599
 600 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg, int intArg,
 601                                   QueueMode mode)
 602 {
 603     return queueCmdString(cmd, makeCmdString(cmd, strArg, intArg), mode);
 604 }
 605
 606 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 607                                   QueueMode mode)
 608 {
 609     return queueCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), mode);
 610 }
 611
 612 void GdbDriver::terminate()
 613 {
 614     kill(SIGTERM);
 615     m_state = DSidle;
 616 }
 617
 618 void GdbDriver::detachAndTerminate()
 619 {
 620     kill(SIGINT);
 621     flushCommands();
 622     executeCmdString(DCinitialize, "detach\nquit\n", true);
 623 }
 624
 625 void GdbDriver::interruptInferior()
 626 {
 627     kill(SIGINT);
 628     // remove accidentally queued commands
 629     flushHiPriQueue();
 630 }
 631
 632 static bool isErrorExpr(const char* output)
 633 {
 634     return
 635         strncmp(output, "Cannot access memory at", 23) == 0 ||
 636         strncmp(output, "Attempt to dereference a generic pointer", 40) == 0 ||
 637         strncmp(output, "Attempt to take contents of ", 28) == 0 ||
 638         strncmp(output, "Attempt to use a type name as an expression", 43) == 0 ||
 639         strncmp(output, "There is no member or method named", 34) == 0 ||
 640         strncmp(output, "A parse error in expression", 27) == 0 ||
 641         strncmp(output, "No symbol \"", 11) == 0 ||
 642         strncmp(output, "Internal error: ", 16) == 0;
 643 }
 644
 645 /**
 646  * Returns true if the output is an error message. If wantErrorValue is
 647  * true, a new VarTree object is created and filled with the error message.
 648  */
 649 static bool parseErrorMessage(const char* output,
 650                               VarTree*& variable, bool wantErrorValue)
 651 {
 652     if (isErrorExpr(output))
 653     {
 654         if (wantErrorValue) {
 655             // put the error message as value in the variable
 656             variable = new VarTree(QString(), VarTree::NKplain);
 657             const char* endMsg = strchr(output, '\n');
 658             if (endMsg == 0)
 659                 endMsg = output + strlen(output);
 660             variable->m_value = FROM_LATIN1(output, endMsg-output);
 661         } else {
 662             variable = 0;
 663         }
 664         return true;
 665     }
 666     return false;
 667 }
 668
 669 #if QT_VERSION >= 300
 670 union Qt2QChar {
 671     short s;
 672     struct {
 673         uchar row;
 674         uchar cell;
 675     } qch;
 676 };
 677 #endif
 678
 679 VarTree* GdbDriver::parseQCharArray(const char* output, bool wantErrorValue, bool qt3like)
 680 {
 681     VarTree* variable = 0;
 682
 683     /*
 684      * Parse off white space. gdb sometimes prints white space first if the
 685      * printed array leaded to an error.
 686      */
 687     const char* p = output;
 688     while (isspace(*p))
 689         p++;
 690
 691     // check if this is an error indicating that gdb does not know about QString::null
 692     if (cmds[DCprintQStringStruct].fmt == printQStringStructFmt &&
 693         (strncmp(p, "Internal error: could not find static variable null", 51) == 0 ||
 694          /*
 695           * At least gdb 5.2.1 reports the following error when it accesses
 696           * QString::null. Checking for it can result in false positives
 697           * (where the error is actually triggered by a real NULL pointer
 698           * in a badly initialized QString variable) but the consequences
 699           * are mild.
 700           */
 701          strncmp(p, "Cannot access memory at address 0x0", 35) == 0))
 702     {
 703         /* QString::null doesn't work, use an alternate expression */
 704         cmds[DCprintQStringStruct].fmt = printQStringStructNoNullFmt;
 705         // continue and let parseOffErrorExpr catch the error
 706     }
 707
 708     // special case: empty string (0 repetitions)
 709     if (strncmp(p, "Invalid number 0 of repetitions", 31) == 0)
 710     {
 711         variable = new VarTree(QString(), VarTree::NKplain);
 712         variable->m_value = "\"\"";
 713         return variable;
 714     }
 715
 716     // check for error conditions
 717     if (parseErrorMessage(p, variable, wantErrorValue))
 718         return variable;
 719
 720     // parse the array
 721
 722     // find '='
 723     p = strchr(p, '=');
 724     if (p == 0) {
 725         goto error;
 726     }
 727     // skip white space
 728     do {
 729         p++;
 730     } while (isspace(*p));
 731
 732     if (*p == '{')
 733     {
 734         // this is the real data
 735         p++;                            /* skip '{' */
 736
 737         // parse the array
 738         QString result;
 739         QString repeatCount;
 740         enum { wasNothing, wasChar, wasRepeat } lastThing = wasNothing;
 741         /*
 742          * A matrix for separators between the individual "things"
 743          * that are added to the string. The first index is a bool,
 744          * the second index is from the enum above.
 745          */
 746         static const char* separator[2][3] = {
 747             { "\"", 0,       ", \"" },  /* normal char is added */
 748             { "'",  "\", '", ", '" }    /* repeated char is added */
 749         };
 750
 751         while (isdigit(*p)) {
 752             // parse a number
 753             char* end;
 754             unsigned short value = (unsigned short) strtoul(p, &end, 0);
 755             if (end == p)
 756                 goto error;             /* huh? no valid digits */
 757             // skip separator and search for a repeat count
 758             p = end;
 759             while (isspace(*p) || *p == ',')
 760                 p++;
 761             bool repeats = strncmp(p, "<repeats ", 9) == 0;
 762             if (repeats) {
 763                 const char* start = p;
 764                 p = strchr(p+9, '>');   /* search end and advance */
 765                 if (p == 0)
 766                     goto error;
 767                 p++;                    /* skip '>' */
 768                 repeatCount = FROM_LATIN1(start, p-start);
 769                 while (isspace(*p) || *p == ',')
 770                     p++;
 771             }
 772             // p is now at the next char (or the end)
 773
 774             // interpret the value as a QChar
 775             // TODO: make cross-architecture compatible
 776             QChar ch;
 777             if (qt3like) {
 778                 ch = QChar(value);
 779             } else {
 780 #if QT_VERSION < 300
 781                 (unsigned short&)ch = value;
 782 #else
 783                 Qt2QChar c;
 784                 c.s = value;
 785                 ch.setRow(c.qch.row);
 786                 ch.setCell(c.qch.cell);
 787 #endif
 788             }
 789
 790             // escape a few frequently used characters
 791             char escapeCode = '\0';
 792             switch (ch.latin1()) {
 793             case '\n': escapeCode = 'n'; break;
 794             case '\r': escapeCode = 'r'; break;
 795             case '\t': escapeCode = 't'; break;
 796             case '\b': escapeCode = 'b'; break;
 797             case '\"': escapeCode = '\"'; break;
 798             case '\\': escapeCode = '\\'; break;
 799             case '\0': if (value == 0) { escapeCode = '0'; } break;
 800             }
 801
 802             // add separator
 803             result += separator[repeats][lastThing];
 804             // add char
 805             if (escapeCode != '\0') {
 806                 result += '\\';
 807                 ch = escapeCode;
 808             }
 809             result += ch;
 810
 811             // fixup repeat count and lastThing
 812             if (repeats) {
 813                 result += "' ";
 814                 result += repeatCount;
 815                 lastThing = wasRepeat;
 816             } else {
 817                 lastThing = wasChar;
 818             }
 819         }
 820         if (*p != '}')
 821             goto error;
 822
 823         // closing quote
 824         if (lastThing == wasChar)
 825             result += "\"";
 826
 827         // assign the value
 828         variable = new VarTree(QString(), VarTree::NKplain);
 829         variable->m_value = result;
 830     }
 831     else if (strncmp(p, "true", 4) == 0)
 832     {
 833         variable = new VarTree(QString(), VarTree::NKplain);
 834         variable->m_value = "QString::null";
 835     }
 836     else if (strncmp(p, "false", 5) == 0)
 837     {
 838         variable = new VarTree(QString(), VarTree::NKplain);
 839         variable->m_value = "(null)";
 840     }
 841     else
 842         goto error;
 843     return variable;
 844
 845 error:
 846     if (wantErrorValue) {
 847         variable = new VarTree(QString(), VarTree::NKplain);
 848         variable->m_value = "internal parse error";
 849     }
 850     return variable;
 851 }
 852
 853 static VarTree* parseVar(const char*& s)
 854 {
 855     const char* p = s;
 856
 857     // skip whitespace
 858     while (isspace(*p))
 859         p++;
 860
 861     QString name;
 862     VarTree::NameKind kind;
 863     if (!parseName(p, name, kind)) {
 864         return 0;
 865     }
 866
 867     // go for '='
 868     while (isspace(*p))
 869         p++;
 870     if (*p != '=') {
 871         TRACE(QString().sprintf("parse error: = not found after %s", (const char*)name));
 872         return 0;
 873     }
 874     // skip the '=' and more whitespace
 875     p++;
 876     while (isspace(*p))
 877         p++;
 878
 879     VarTree* variable = new VarTree(name, kind);
 880     variable->setDeleteChildren(true);
 881
 882     if (!parseValue(p, variable)) {
 883         delete variable;
 884         return 0;
 885     }
 886     s = p;
 887     return variable;
 888 }
 889
 890 static void skipNested(const char*& s, char opening, char closing)
 891 {
 892     const char* p = s;
 893
 894     // parse a nested type
 895     int nest = 1;
 896     p++;
 897     /*
 898      * Search for next matching `closing' char, skipping nested pairs of
 899      * `opening' and `closing'.
 900      */
 901     while (*p && nest > 0) {
 902         if (*p == opening) {
 903             nest++;
 904         } else if (*p == closing) {
 905             nest--;
 906         }
 907         p++;
 908     }
 909     if (nest != 0) {
 910         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
 911     }
 912     s = p;
 913 }
 914
 915 /**
 916  * Find the end of line that is not inside braces
 917  */
 918 static void findEnd(const char*& s)
 919 {
 920     const char* p = s;
 921     while (*p && *p!='\n') {
 922         while (*p && *p!='\n' && *p!='{')
 923             p++;
 924         if (*p=='{') {
 925             p++;
 926             skipNested(p, '{', '}'); p--;
 927         }
 928     }
 929     s = p;
 930 }
 931
 932 static bool isNumberish(const char ch)
 933 {
 934     return (ch>='0' && ch<='9') || ch=='.' || ch=='x';
 935 }
 936
 937 void skipString(const char*& p)
 938 {
 939 moreStrings:
 940     // opening quote
 941     char quote = *p++;
 942     while (*p != quote) {
 943         if (*p == '\\') {
 944             // skip escaped character
 945             // no special treatment for octal values necessary
 946             p++;
 947         }
 948         // simply return if no more characters
 949         if (*p == '\0')
 950             return;
 951         p++;
 952     }
 953     // closing quote
 954     p++;
 955     /*
 956      * Strings can consist of several parts, some of which contain repeated
 957      * characters.
 958      */
 959     if (quote == '\'') {
 960         // look ahaead for <repeats 123 times>
 961         const char* q = p+1;
 962         while (isspace(*q))
 963             q++;
 964         if (strncmp(q, "<repeats ", 9) == 0) {
 965             p = q+9;
 966             while (*p != '\0' && *p != '>')
 967                 p++;
 968             if (*p != '\0') {
 969                 p++;                    /* skip the '>' */
 970             }
 971         }
 972     }
 973     // is the string continued?
 974     if (*p == ',') {
 975         // look ahead for another quote
 976         const char* q = p+1;
 977         while (isspace(*q))
 978             q++;
 979         if (*q == '"' || *q == '\'') {
 980             // yes!
 981             p = q;
 982             goto moreStrings;
 983         }
 984     }
 985     /* very long strings are followed by `...' */
 986     if (*p == '.' && p[1] == '.' && p[2] == '.') {
 987         p += 3;
 988     }
 989 }
 990
 991 static void skipNestedWithString(const char*& s, char opening, char closing)
 992 {
 993     const char* p = s;
 994
 995     // parse a nested expression
 996     int nest = 1;
 997     p++;
 998     /*
 999      * Search for next matching `closing' char, skipping nested pairs of
1000      * `opening' and `closing' as well as strings.
1001      */
1002     while (*p && nest > 0) {
1003         if (*p == opening) {
1004             nest++;
1005         } else if (*p == closing) {
1006             nest--;
1007         } else if (*p == '\'' || *p == '\"') {
1008             skipString(p);
1009             continue;
1010         }
1011         p++;
1012     }
1013     if (nest > 0) {
1014         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
1015     }
1016     s = p;
1017 }
1018
1019 inline void skipName(const char*& p)
1020 {
1021     // allow : (for enumeration values) and $ and . (for _vtbl.)
1022     while (isalnum(*p) || *p == '_' || *p == ':' || *p == '$' || *p == '.')
1023         p++;
1024 }
1025
1026 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind)
1027 {
1028     kind = VarTree::NKplain;
1029
1030     const char* p = s;
1031     // examples of names:
1032     //  name
1033     //  <Object>
1034     //  <string<a,b<c>,7> >
1035
1036     if (*p == '<') {
1037         skipNested(p, '<', '>');
1038         name = FROM_LATIN1(s, p - s);
1039         kind = VarTree::NKtype;
1040     }
1041     else
1042     {
1043         // name, which might be "static"; allow dot for "_vtbl."
1044         skipName(p);
1045         if (p == s) {
1046             TRACE(QString().sprintf("parse error: not a name %-20.20s", s));
1047             return false;
1048         }
1049         int len = p - s;
1050         if (len == 6 && strncmp(s, "static", 6) == 0) {
1051             kind = VarTree::NKstatic;
1052
1053             // its a static variable, name comes now
1054             while (isspace(*p))
1055                 p++;
1056             s = p;
1057             skipName(p);
1058             if (p == s) {
1059                 TRACE(QString().sprintf("parse error: not a name after static %-20.20s", s));
1060                 return false;
1061             }
1062             len = p - s;
1063         }
1064         name = FROM_LATIN1(s, len);
1065     }
1066     // return the new position
1067     s = p;
1068     return true;
1069 }
1070
1071 static bool parseValue(const char*& s, VarTree* variable)
1072 {
1073     variable->m_value = "";
1074
1075 repeat:
1076     if (*s == '{') {
1077         s++;
1078         if (!parseNested(s, variable)) {
1079             return false;
1080         }
1081         // must be the closing brace
1082         if (*s != '}') {
1083             TRACE("parse error: missing } of " +  variable->getText());
1084             return false;
1085         }
1086         s++;
1087         // final white space
1088         while (isspace(*s))
1089             s++;
1090     } else {
1091         // examples of leaf values (cannot be the empty string):
1092         //  123
1093         //  -123
1094         //  23.575e+37
1095         //  0x32a45
1096         //  @0x012ab4
1097         //  (DwContentType&) @0x8123456: {...}
1098         //  0x32a45 "text"
1099         //  10 '\n'
1100         //  <optimized out>
1101         //  0x823abc <Array<int> virtual table>
1102         //  (void (*)()) 0x8048480 <f(E *, char)>
1103         //  (E *) 0xbffff450
1104         //  red
1105         //  &parseP (HTMLClueV *, char *)
1106
1107         const char*p = s;
1108
1109         // check for type
1110         QString type;
1111         if (*p == '(') {
1112             skipNested(p, '(', ')');
1113
1114             while (isspace(*p))
1115                 p++;
1116             variable->m_value = FROM_LATIN1(s, p - s);
1117         }
1118
1119         bool reference = false;
1120         if (*p == '@') {
1121             // skip reference marker
1122             p++;
1123             reference = true;
1124         }
1125         const char* start = p;
1126         if (*p == '-')
1127             p++;
1128
1129         // some values consist of more than one token
1130         bool checkMultiPart = false;
1131
1132         if (p[0] == '0' && p[1] == 'x') {
1133             // parse hex number
1134             p += 2;
1135             while (isxdigit(*p))
1136                 p++;
1137
1138             /*
1139              * Assume this is a pointer, but only if it's not a reference, since
1140              * references can't be expanded.
1141              */
1142             if (!reference) {
1143                 variable->m_varKind = VarTree::VKpointer;
1144             } else {
1145                 /*
1146                  * References are followed by a colon, in which case we'll
1147                  * find the value following the reference address.
1148                  */
1149                 if (*p == ':') {
1150                     p++;
1151                 } else {
1152                     // Paranoia. (Can this happen, i.e. reference not followed by ':'?)
1153                     reference = false;
1154                 }
1155             }
1156             checkMultiPart = true;
1157         } else if (isdigit(*p)) {
1158             // parse decimal number, possibly a float
1159             while (isdigit(*p))
1160                 p++;
1161             if (*p == '.') {            /* TODO: obey i18n? */
1162                 // fractional part
1163                 p++;
1164                 while (isdigit(*p))
1165                     p++;
1166             }
1167             if (*p == 'e' || *p == 'E') {
1168                 p++;
1169                 // exponent
1170                 if (*p == '-' || *p == '+')
1171                     p++;
1172                 while (isdigit(*p))
1173                     p++;
1174             }
1175
1176             // for char variables there is the char, eg. 10 '\n'
1177             checkMultiPart = true;
1178         } else if (*p == '<') {
1179             // e.g. <optimized out>
1180             skipNested(p, '<', '>');
1181         } else if (*p == '"' || *p == '\'') {
1182             // character may have multipart: '\000' <repeats 11 times>
1183             checkMultiPart = *p == '\'';
1184             // found a string
1185             skipString(p);
1186         } else if (*p == '&') {
1187             // function pointer
1188             p++;
1189             skipName(p);
1190             while (isspace(*p)) {
1191                 p++;
1192             }
1193             if (*p == '(') {
1194                 skipNested(p, '(', ')');
1195             }
1196         } else {
1197             // must be an enumeration value
1198             skipName(p);
1199         }
1200         variable->m_value += FROM_LATIN1(start, p - start);
1201
1202         if (checkMultiPart) {
1203             // white space
1204             while (isspace(*p))
1205                 p++;
1206             // may be followed by a string or <...>
1207             start = p;
1208
1209             if (*p == '"' || *p == '\'') {
1210                 skipString(p);
1211             } else if (*p == '<') {
1212                 // if this value is part of an array, it might be followed
1213                 // by <repeats 15 times>, which we don't skip here
1214                 if (strncmp(p, "<repeats ", 9) != 0)
1215                     skipNested(p, '<', '>');
1216             }
1217             if (p != start) {
1218                 // there is always a blank before the string,
1219                 // which we will include in the final string value
1220                 variable->m_value += FROM_LATIN1(start-1, (p - start)+1);
1221                 // if this was a pointer, reset that flag since we
1222                 // now got the value
1223                 variable->m_varKind = VarTree::VKsimple;
1224             }
1225         }
1226
1227         if (variable->m_value.length() == 0) {
1228             TRACE("parse error: no value for " + variable->getText());
1229             return false;
1230         }
1231
1232         // final white space
1233         while (isspace(*p))
1234             p++;
1235         s = p;
1236
1237         /*
1238          * If this was a reference, the value follows. It might even be a
1239          * composite variable!
1240          */
1241         if (reference) {
1242             goto repeat;
1243         }
1244
1245         if (variable->m_varKind == VarTree::VKpointer) {
1246             variable->setDelayedExpanding(true);
1247         }
1248     }
1249
1250     return true;
1251 }
1252
1253 static bool parseNested(const char*& s, VarTree* variable)
1254 {
1255     // could be a structure or an array
1256     while (isspace(*s))
1257         s++;
1258
1259     const char* p = s;
1260     bool isStruct = false;
1261     /*
1262      * If there is a name followed by an = or an < -- which starts a type
1263      * name -- or "static", it is a structure
1264      */
1265     if (*p == '<' || *p == '}') {
1266         isStruct = true;
1267     } else if (strncmp(p, "static ", 7) == 0) {
1268         isStruct = true;
1269     } else if (isalpha(*p) || *p == '_' || *p == '$') {
1270         // look ahead for a comma after the name
1271         skipName(p);
1272         while (isspace(*p))
1273             p++;
1274         if (*p == '=') {
1275             isStruct = true;
1276         }
1277         p = s;                          /* rescan the name */
1278     }
1279     if (isStruct) {
1280         if (!parseVarSeq(p, variable)) {
1281             return false;
1282         }
1283         variable->m_varKind = VarTree::VKstruct;
1284     } else {
1285         if (!parseValueSeq(p, variable)) {
1286             return false;
1287         }
1288         variable->m_varKind = VarTree::VKarray;
1289     }
1290     s = p;
1291     return true;
1292 }
1293
1294 static bool parseVarSeq(const char*& s, VarTree* variable)
1295 {
1296     // parse a comma-separated sequence of variables
1297     VarTree* var = variable;            /* var != 0 to indicate success if empty seq */
1298     for (;;) {
1299         if (*s == '}')
1300             break;
1301         if (strncmp(s, "<No data fields>}", 17) == 0)
1302         {
1303             // no member variables, so break out immediately
1304             s += 16;                    /* go to the closing brace */
1305             break;
1306         }
1307         var = parseVar(s);
1308         if (var == 0)
1309             break;                      /* syntax error */
1310         variable->appendChild(var);
1311         if (*s != ',')
1312             break;
1313         // skip the comma and whitespace
1314         s++;
1315         while (isspace(*s))
1316             s++;
1317     }
1318     return var != 0;
1319 }
1320
1321 static bool parseValueSeq(const char*& s, VarTree* variable)
1322 {
1323     // parse a comma-separated sequence of variables
1324     int index = 0;
1325     bool good;
1326     for (;;) {
1327         QString name;
1328         name.sprintf("[%d]", index);
1329         VarTree* var = new VarTree(name, VarTree::NKplain);
1330         var->setDeleteChildren(true);
1331         good = parseValue(s, var);
1332         if (!good) {
1333             delete var;
1334             return false;
1335         }
1336         // a value may be followed by "<repeats 45 times>"
1337         if (strncmp(s, "<repeats ", 9) == 0) {
1338             s += 9;
1339             char* end;
1340             int l = strtol(s, &end, 10);
1341             if (end == s || strncmp(end, " times>", 7) != 0) {
1342                 // should not happen
1343                 delete var;
1344                 return false;
1345             }
1346             TRACE(QString().sprintf("found <repeats %d times> in array", l));
1347             // replace name and advance index
1348             name.sprintf("[%d .. %d]", index, index+l-1);
1349             var->setText(name);
1350             index += l;
1351             // skip " times>" and space
1352             s = end+7;
1353             // possible final space
1354             while (isspace(*s))
1355                 s++;
1356         } else {
1357             index++;
1358         }
1359         variable->appendChild(var);
1360         if (*s != ',') {
1361             break;
1362         }
1363         // skip the comma and whitespace
1364         s++;
1365         while (isspace(*s))
1366             s++;
1367         // sometimes there is a closing brace after a comma
1368 //      if (*s == '}')
1369 //          break;
1370     }
1371     return true;
1372 }
1373
1374 /**
1375  * Parses a stack frame.
1376  */
1377 static void parseFrameInfo(const char*& s, QString& func,
1378                            QString& file, int& lineNo, DbgAddr& address)
1379 {
1380     const char* p = s;
1381
1382     // next may be a hexadecimal address
1383     if (*p == '0') {
1384         const char* start = p;
1385         p++;
1386         if (*p == 'x')
1387             p++;
1388         while (isxdigit(*p))
1389             p++;
1390         address = FROM_LATIN1(start, p-start);
1391         if (strncmp(p, " in ", 4) == 0)
1392             p += 4;
1393     } else {
1394         address = DbgAddr();
1395     }
1396     const char* start = p;
1397     // check for special signal handler frame
1398     if (strncmp(p, "<signal handler called>", 23) == 0) {
1399         func = FROM_LATIN1(start, 23);
1400         file = QString();
1401         lineNo = -1;
1402         s = p+23;
1403         if (*s == '\n')
1404             s++;
1405         return;
1406     }
1407     // search opening parenthesis
1408     while (*p != '\0' && *p != '(')
1409         p++;
1410     if (*p == '\0') {
1411         func = start;
1412         file = QString();
1413         lineNo = -1;
1414         s = p;
1415         return;
1416     }
1417     /*
1418      * Skip parameters. But notice that for complicated conversion
1419      * functions (eg. "operator int(**)()()", ie. convert to pointer to
1420      * pointer to function) as well as operator()(...) we have to skip
1421      * additional pairs of parentheses. Furthermore, recent gdbs write the
1422      * demangled name followed by the arguments in a pair of parentheses,
1423      * where the demangled name can end in "const".
1424      */
1425     do {
1426         skipNestedWithString(p, '(', ')');
1427         while (isspace(*p))
1428             p++;
1429         // skip "const"
1430         if (strncmp(p, "const", 5) == 0) {
1431             p += 5;
1432             while (isspace(*p))
1433                 p++;
1434         }
1435     } while (*p == '(');
1436
1437     // check for file position
1438     if (strncmp(p, "at ", 3) == 0) {
1439         p += 3;
1440         const char* fileStart = p;
1441         // go for the end of the line
1442         while (*p != '\0' && *p != '\n')
1443             p++;
1444         // search back for colon
1445         const char* colon = p;
1446         do {
1447             --colon;
1448         } while (*colon != ':');
1449         file = FROM_LATIN1(fileStart, colon-fileStart);
1450         lineNo = atoi(colon+1)-1;
1451         // skip new-line
1452         if (*p != '\0')
1453             p++;
1454     } else {
1455         // check for "from shared lib"
1456         if (strncmp(p, "from ", 5) == 0) {
1457             p += 5;
1458             // go for the end of the line
1459             while (*p != '\0' && *p != '\n')
1460                 p++;
1461             // skip new-line
1462             if (*p != '\0')
1463                 p++;
1464         }
1465         file = "";
1466         lineNo = -1;
1467     }
1468     // construct the function name (including file info)
1469     if (*p == '\0') {
1470         func = start;
1471     } else {
1472         func = FROM_LATIN1(start, p-start-1);   /* don't include \n */
1473     }
1474     s = p;
1475
1476     /*
1477      * Replace \n (and whitespace around it) in func by a blank. We cannot
1478      * use QString::simplifyWhiteSpace() for this because this would also
1479      * simplify space that belongs to a string arguments that gdb sometimes
1480      * prints in the argument lists of the function.
1481      */
1482     ASSERT(!isspace(func[0].latin1()));         /* there must be non-white before first \n */
1483     int nl = 0;
1484     while ((nl = func.find('\n', nl)) >= 0) {
1485         // search back to the beginning of the whitespace
1486         int startWhite = nl;
1487         do {
1488             --startWhite;
1489         } while (isspace(func[startWhite].latin1()));
1490         startWhite++;
1491         // search forward to the end of the whitespace
1492         do {
1493             nl++;
1494         } while (isspace(func[nl].latin1()));
1495         // replace
1496         func.replace(startWhite, nl-startWhite, " ");
1497         /* continue searching for more \n's at this place: */
1498         nl = startWhite+1;
1499     }
1500 }
1501
1502
1503 /**
1504  * Parses a stack frame including its frame number
1505  */
1506 static bool parseFrame(const char*& s, int& frameNo, QString& func,
1507                        QString& file, int& lineNo, DbgAddr& address)
1508 {
1509     // Example:
1510     //  #1  0x8048881 in Dl::Dl (this=0xbffff418, r=3214) at testfile.cpp:72
1511     //  Breakpoint 3, Cl::f(int) const (this=0xbffff3c0, x=17) at testfile.cpp:155
1512
1513     // must start with a hash mark followed by number
1514     // or with "Breakpoint " followed by number and comma
1515     if (s[0] == '#') {
1516         if (!isdigit(s[1]))
1517             return false;
1518         s++;                            /* skip the hash mark */
1519     } else if (strncmp(s, "Breakpoint ", 11) == 0) {
1520         if (!isdigit(s[11]))
1521             return false;
1522         s += 11;                        /* skip "Breakpoint" */
1523     } else
1524         return false;
1525
1526     // frame number
1527     frameNo = atoi(s);
1528     while (isdigit(*s))
1529         s++;
1530     // space and comma
1531     while (isspace(*s) || *s == ',')
1532         s++;
1533     parseFrameInfo(s, func, file, lineNo, address);
1534     return true;
1535 }
1536
1537 void GdbDriver::parseBackTrace(const char* output, QList<StackFrame>& stack)
1538 {
1539     QString func, file;
1540     int lineNo, frameNo;
1541     DbgAddr address;
1542
1543     while (::parseFrame(output, frameNo, func, file, lineNo, address)) {
1544         StackFrame* frm = new StackFrame;
1545         frm->frameNo = frameNo;
1546         frm->fileName = file;
1547         frm->lineNo = lineNo;
1548         frm->address = address;
1549         frm->var = new VarTree(func, VarTree::NKplain);
1550         stack.append(frm);
1551     }
1552 }
1553
1554 bool GdbDriver::parseFrameChange(const char* output, int& frameNo,
1555                                  QString& file, int& lineNo, DbgAddr& address)
1556 {
1557     QString func;
1558     return ::parseFrame(output, frameNo, func, file, lineNo, address);
1559 }
1560
1561
1562 bool GdbDriver::parseBreakList(const char* output, QList<Breakpoint>& brks)
1563 {
1564     // skip first line, which is the headline
1565     const char* p = strchr(output, '\n');
1566     if (p == 0)
1567         return false;
1568     p++;
1569     if (*p == '\0')
1570         return false;
1571
1572     // split up a line
1573     QString location;
1574     QString address;
1575     int hits = 0;
1576     uint ignoreCount = 0;
1577     QString condition;
1578     const char* end;
1579     char* dummy;
1580     while (*p != '\0') {
1581         // get Num
1582         long bpNum = strtol(p, &dummy, 10);     /* don't care about overflows */
1583         p = dummy;
1584         // get Type
1585         while (isspace(*p))
1586             p++;
1587         Breakpoint::Type bpType = Breakpoint::breakpoint;
1588         if (strncmp(p, "breakpoint", 10) == 0) {
1589             p += 10;
1590         } else if (strncmp(p, "hw watchpoint", 13) == 0) {
1591             bpType = Breakpoint::watchpoint;
1592             p += 13;
1593         } else if (strncmp(p, "watchpoint", 10) == 0) {
1594             bpType = Breakpoint::watchpoint;
1595             p += 10;
1596         }
1597         while (isspace(*p))
1598             p++;
1599         if (*p == '\0')
1600             break;
1601         // get Disp
1602         char disp = *p++;
1603         while (*p != '\0' && !isspace(*p))      /* "keep" or "del" */
1604             p++;
1605         while (isspace(*p))
1606             p++;
1607         if (*p == '\0')
1608             break;
1609         // get Enb
1610         char enable = *p++;
1611         while (*p != '\0' && !isspace(*p))      /* "y" or "n" */
1612             p++;
1613         while (isspace(*p))
1614             p++;
1615         if (*p == '\0')
1616             break;
1617         // the address, if present
1618         if (bpType == Breakpoint::breakpoint &&
1619             strncmp(p, "0x", 2) == 0)
1620         {
1621             const char* start = p;
1622             while (*p != '\0' && !isspace(*p))
1623                 p++;
1624             address = FROM_LATIN1(start, p-start);
1625             while (isspace(*p) && *p != '\n')
1626                 p++;
1627             if (*p == '\0')
1628                 break;
1629         } else {
1630             address = QString();
1631         }
1632         // remainder is location, hit and ignore count, condition
1633         hits = 0;
1634         ignoreCount = 0;
1635         condition = QString();
1636         end = strchr(p, '\n');
1637         if (end == 0) {
1638             location = p;
1639             p += location.length();
1640         } else {
1641             location = FROM_LATIN1(p, end-p).stripWhiteSpace();
1642             p = end+1;                  /* skip over \n */
1643         }
1644
1645         // may be continued in next line
1646         while (isspace(*p)) {   /* p points to beginning of line */
1647             // skip white space at beginning of line
1648             while (isspace(*p))
1649                 p++;
1650
1651             // seek end of line
1652             end = strchr(p, '\n');
1653             if (end == 0)
1654                 end = p+strlen(p);
1655
1656             if (strncmp(p, "breakpoint already hit", 22) == 0) {
1657                 // extract the hit count
1658                 p += 22;
1659                 hits = strtol(p, &dummy, 10);
1660                 TRACE(QString().sprintf("hit count %d", hits));
1661             } else if (strncmp(p, "stop only if ", 13) == 0) {
1662                 // extract condition
1663                 p += 13;
1664                 condition = FROM_LATIN1(p, end-p).stripWhiteSpace();
1665                 TRACE("condition: "+condition);
1666             } else if (strncmp(p, "ignore next ", 12) == 0) {
1667                 // extract ignore count
1668                 p += 12;
1669                 ignoreCount = strtol(p, &dummy, 10);
1670                 TRACE(QString().sprintf("ignore count %d", ignoreCount));
1671             } else {
1672                 // indeed a continuation
1673                 location += " " + FROM_LATIN1(p, end-p).stripWhiteSpace();
1674             }
1675             p = end;
1676             if (*p != '\0')
1677                 p++;                    /* skip '\n' */
1678         }
1679         Breakpoint* bp = new Breakpoint;
1680         bp->id = bpNum;
1681         bp->type = bpType;
1682         bp->temporary = disp == 'd';
1683         bp->enabled = enable == 'y';
1684         bp->location = location;
1685         bp->address = address;
1686         bp->hitCount = hits;
1687         bp->ignoreCount = ignoreCount;
1688         bp->condition = condition;
1689         brks.append(bp);
1690     }
1691     return true;
1692 }
1693
1694 bool GdbDriver::parseThreadList(const char* output, QList<ThreadInfo>& threads)
1695 {
1696     if (strcmp(output, "\n") == 0 || strncmp(output, "No stack.", 9) == 0) {
1697         // no threads
1698         return true;
1699     }
1700
1701     int id;
1702     QString systag;
1703     QString func, file;
1704     int lineNo;
1705     DbgAddr address;
1706
1707     const char* p = output;
1708     while (*p != '\0') {
1709         // seach look for thread id, watching out for  the focus indicator
1710         bool hasFocus = false;
1711         while (isspace(*p))             /* may be \n from prev line: see "No stack" below */
1712             p++;
1713         if (*p == '*') {
1714             hasFocus = true;
1715             p++;
1716             // there follows only whitespace
1717         }
1718         char* end;
1719         id = strtol(p, &end, 10);
1720         if (p == end) {
1721             // syntax error: no number found; bail out
1722             return true;
1723         }
1724         p = end;
1725
1726         // skip space
1727         while (isspace(*p))
1728             p++;
1729
1730         /*
1731          * Now follows the thread's SYSTAG. It is terminated by two blanks.
1732          */
1733         end = strstr(p, "  ");
1734         if (end == 0) {
1735             // syntax error; bail out
1736             return true;
1737         }
1738         systag = FROM_LATIN1(p, end-p);
1739         p = end+2;
1740
1741         /*
1742          * Now follows a standard stack frame. Sometimes, however, gdb
1743          * catches a thread at an instant where it doesn't have a stack.
1744          */
1745         if (strncmp(p, "[No stack.]", 11) != 0) {
1746             ::parseFrameInfo(p, func, file, lineNo, address);
1747         } else {
1748             func = "[No stack]";
1749             file = QString();
1750             lineNo = -1;
1751             address = QString();
1752             p += 11;                    /* \n is skipped above */
1753         }
1754
1755         ThreadInfo* thr = new ThreadInfo;
1756         thr->id = id;
1757         thr->threadName = systag;
1758         thr->hasFocus = hasFocus;
1759         thr->function = func;
1760         thr->fileName = file;
1761         thr->lineNo = lineNo;
1762         thr->address = address;
1763         threads.append(thr);
1764     }
1765     return true;
1766 }
1767
1768 static bool parseNewBreakpoint(const char* o, int& id,
1769                                QString& file, int& lineNo, QString& address);
1770 static bool parseNewWatchpoint(const char* o, int& id,
1771                                QString& expr);
1772
1773 bool GdbDriver::parseBreakpoint(const char* output, int& id,
1774                                 QString& file, int& lineNo, QString& address)
1775 {
1776     const char* o = output;
1777     // skip lines of that begin with "(Cannot find"
1778     while (strncmp(o, "(Cannot find", 12) == 0) {
1779         o = strchr(o, '\n');
1780         if (o == 0)
1781             return false;
1782         o++;                            /* skip newline */
1783     }
1784
1785     if (strncmp(o, "Breakpoint ", 11) == 0) {
1786         output += 11;                   /* skip "Breakpoint " */
1787         return ::parseNewBreakpoint(output, id, file, lineNo, address);
1788     } else if (strncmp(o, "Hardware watchpoint ", 20) == 0) {
1789         output += 20;
1790         return ::parseNewWatchpoint(output, id, address);
1791     } else if (strncmp(o, "Watchpoint ", 11) == 0) {
1792         output += 11;
1793         return ::parseNewWatchpoint(output, id, address);
1794     }
1795     return false;
1796 }
1797
1798 static bool parseNewBreakpoint(const char* o, int& id,
1799                                QString& file, int& lineNo, QString& address)
1800 {
1801     // breakpoint id
1802     char* p;
1803     id = strtoul(o, &p, 10);
1804     if (p == o)
1805         return false;
1806
1807     // check for the address
1808     if (strncmp(p, " at 0x", 6) == 0) {
1809         char* start = p+4;             /* skip " at ", but not 0x */
1810         p += 6;
1811         while (isxdigit(*p))
1812             ++p;
1813         address = FROM_LATIN1(start, p-start);
1814     }
1815
1816     // file name
1817     char* fileStart = strstr(p, "file ");
1818     if (fileStart == 0)
1819         return !address.isEmpty();     /* parse error only if there's no address */
1820     fileStart += 5;
1821
1822     // line number
1823     char* numStart = strstr(fileStart, ", line ");
1824     QString fileName = FROM_LATIN1(fileStart, numStart-fileStart);
1825     numStart += 7;
1826     int line = strtoul(numStart, &p, 10);
1827     if (numStart == p)
1828         return false;
1829
1830     file = fileName;
1831     lineNo = line-1;                    /* zero-based! */
1832     return true;
1833 }
1834
1835 static bool parseNewWatchpoint(const char* o, int& id,
1836                                QString& expr)
1837 {
1838     // watchpoint id
1839     char* p;
1840     id = strtoul(o, &p, 10);
1841     if (p == o)
1842         return false;
1843
1844     if (strncmp(p, ": ", 2) != 0)
1845         return false;
1846     p += 2;
1847
1848     // all the rest on the line is the expression
1849     expr = FROM_LATIN1(p, strlen(p)).stripWhiteSpace();
1850     return true;
1851 }
1852
1853 void GdbDriver::parseLocals(const char* output, QList<VarTree>& newVars)
1854 {
1855     // check for possible error conditions
1856     if (strncmp(output, "No symbol table", 15) == 0)
1857     {
1858         return;
1859     }
1860
1861     while (*output != '\0') {
1862         while (isspace(*output))
1863             output++;
1864         if (*output == '\0')
1865             break;
1866         // skip occurrences of "No locals" and "No args"
1867         if (strncmp(output, "No locals", 9) == 0 ||
1868             strncmp(output, "No arguments", 12) == 0)
1869         {
1870             output = strchr(output, '\n');
1871             if (output == 0) {
1872                 break;
1873             }
1874             continue;
1875         }
1876
1877         VarTree* variable = parseVar(output);
1878         if (variable == 0) {
1879             break;
1880         }
1881         // do not add duplicates
1882         for (VarTree* o = newVars.first(); o != 0; o = newVars.next()) {
1883             if (o->getText() == variable->getText()) {
1884                 delete variable;
1885                 goto skipDuplicate;
1886             }
1887         }
1888         newVars.append(variable);
1889     skipDuplicate:;
1890     }
1891 }
1892
1893 bool GdbDriver::parsePrintExpr(const char* output, bool wantErrorValue, VarTree*& var)
1894 {
1895     // check for error conditions
1896     if (parseErrorMessage(output, var, wantErrorValue))
1897     {
1898         return false;
1899     } else {
1900         // parse the variable
1901         var = parseVar(output);
1902         return true;
1903     }
1904 }
1905
1906 bool GdbDriver::parseChangeWD(const char* output, QString& message)
1907 {
1908     bool isGood = false;
1909     message = QString(output).simplifyWhiteSpace();
1910     if (message.isEmpty()) {
1911         message = i18n("New working directory: ") + m_programWD;
1912         isGood = true;
1913     }
1914     return isGood;
1915 }
1916
1917 bool GdbDriver::parseChangeExecutable(const char* output, QString& message)
1918 {
1919     message = output;
1920
1921     m_haveCoreFile = false;
1922
1923     /*
1924      * The command is successful if there is no output or the single
1925      * message (no debugging symbols found) or
1926      * (Using host libthread_db library "/lib/tls/libthread_db.so.1".)
1927      */
1928     return
1929         output[0] == '\0' ||
1930         strcmp(output, "(no debugging symbols found)...") == 0 ||
1931         strncmp(output, "Using host libthread_db library", 31) == 0;
1932 }
1933
1934 bool GdbDriver::parseCoreFile(const char* output)
1935 {
1936     // if command succeeded, gdb emits a line starting with "#0 "
1937     m_haveCoreFile = strstr(output, "\n#0 ") != 0;
1938     return m_haveCoreFile;
1939 }
1940
1941 uint GdbDriver::parseProgramStopped(const char* output, QString& message)
1942 {
1943     // optionally: "program changed, rereading symbols",
1944     // followed by:
1945     // "Program exited normally"
1946     // "Program terminated with wignal SIGSEGV"
1947     // "Program received signal SIGINT" or other signal
1948     // "Breakpoint..."
1949
1950     // go through the output, line by line, checking what we have
1951     const char* start = output - 1;
1952     uint flags = SFprogramActive;
1953     message = QString();
1954     do {
1955         start++;                        /* skip '\n' */
1956
1957         if (strncmp(start, "Program ", 8) == 0 ||
1958             strncmp(start, "ptrace: ", 8) == 0) {
1959             /*
1960              * When we receive a signal, the program remains active.
1961              *
1962              * Special: If we "stopped" in a corefile, the string "Program
1963              * terminated with signal"... is displayed. (Normally, we see
1964              * "Program received signal"... when a signal happens.)
1965              */
1966             if (strncmp(start, "Program exited", 14) == 0 ||
1967                 (strncmp(start, "Program terminated", 18) == 0 && !m_haveCoreFile) ||
1968                 strncmp(start, "ptrace: ", 8) == 0)
1969             {
1970                 flags &= ~SFprogramActive;
1971             }
1972
1973             // set message
1974             const char* endOfMessage = strchr(start, '\n');
1975             if (endOfMessage == 0)
1976                 endOfMessage = start + strlen(start);
1977             message = FROM_LATIN1(start, endOfMessage-start);
1978         } else if (strncmp(start, "Breakpoint ", 11) == 0) {
1979             /*
1980              * We stopped at a (permanent) breakpoint (gdb doesn't tell us
1981              * that it stopped at a temporary breakpoint).
1982              */
1983             flags |= SFrefreshBreak;
1984         } else if (strstr(start, "re-reading symbols.") != 0) {
1985             flags |= SFrefreshSource;
1986         }
1987
1988         // next line, please
1989         start = strchr(start, '\n');
1990     } while (start != 0);
1991
1992     /*
1993      * Gdb only notices when new threads have appeared, but not when a
1994      * thread finishes. So we always have to assume that the list of
1995      * threads has changed.
1996      */
1997     flags |= SFrefreshThreads;
1998
1999     return flags;
2000 }
2001
2002 void GdbDriver::parseSharedLibs(const char* output, QStrList& shlibs)
2003 {
2004     if (strncmp(output, "No shared libraries loaded", 26) == 0)
2005         return;
2006
2007     // parse the table of shared libraries
2008
2009     // strip off head line
2010     output = strchr(output, '\n');
2011     if (output == 0)
2012         return;
2013     output++;                           /* skip '\n' */
2014     QString shlibName;
2015     while (*output != '\0') {
2016         // format of a line is
2017         // 0x404c5000  0x40580d90  Yes         /lib/libc.so.5
2018         // 3 blocks of non-space followed by space
2019         for (int i = 0; *output != '\0' && i < 3; i++) {
2020             while (*output != '\0' && !isspace(*output)) {      /* non-space */
2021                 output++;
2022             }
2023             while (isspace(*output)) {  /* space */
2024                 output++;
2025             }
2026         }
2027         if (*output == '\0')
2028             return;
2029         const char* start = output;
2030         output = strchr(output, '\n');
2031         if (output == 0)
2032             output = start + strlen(start);
2033         shlibName = FROM_LATIN1(start, output-start);
2034         if (*output != '\0')
2035             output++;
2036         shlibs.append(shlibName);
2037         TRACE("found shared lib " + shlibName);
2038     }
2039 }
2040
2041 bool GdbDriver::parseFindType(const char* output, QString& type)
2042 {
2043     if (strncmp(output, "type = ", 7) != 0)
2044         return false;
2045
2046     /*
2047      * Everything else is the type. We strip off all white-space from the
2048      * type.
2049      */
2050     output += 7;
2051     type = output;
2052     type.replace(QRegExp("\\s+"), "");
2053     return true;
2054 }
2055
2056 void GdbDriver::parseRegisters(const char* output, QList<RegisterInfo>& regs)
2057 {
2058     if (strncmp(output, "The program has no registers now", 32) == 0) {
2059         return;
2060     }
2061
2062     QString regName;
2063     QString value;
2064
2065     // parse register values
2066     while (*output != '\0')
2067     {
2068         // skip space at the start of the line
2069         while (isspace(*output))
2070             output++;
2071
2072         // register name
2073         const char* start = output;
2074         while (*output != '\0' && !isspace(*output))
2075             output++;
2076         if (*output == '\0')
2077             break;
2078         regName = FROM_LATIN1(start, output-start);
2079
2080         // skip space
2081         while (isspace(*output))
2082             output++;
2083
2084         RegisterInfo* reg = new RegisterInfo;
2085         reg->regName = regName;
2086
2087         /*
2088          * If we find a brace now, this is a vector register. We look for
2089          * the closing brace and treat the result as cooked value.
2090          */
2091         if (*output == '{')
2092         {
2093             start = output;
2094             skipNested(output, '{', '}');
2095             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2096             // skip space, but not the end of line
2097             while (isspace(*output) && *output != '\n')
2098                 output++;
2099             // get rid of the braces at the begining and the end
2100             value.remove(0, 1);
2101             if (value[value.length()-1] == '}') {
2102                 value = value.left(value.length()-1);
2103             }
2104             // gdb 5.3 doesn't print a separate set of raw values
2105             if (*output == '{') {
2106                 // another set of vector follows
2107                 // what we have so far is the raw value
2108                 reg->rawValue = value;
2109
2110                 start = output;
2111                 skipNested(output, '{', '}');
2112                 value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2113             } else {
2114                 // for gdb 5.3
2115                 // find first type that does not have an array, this is the RAW value
2116                 const char* end=start;
2117                 findEnd(end);
2118                 const char* cur=start;
2119                 while (cur<end) {
2120                     while (*cur != '=' && cur<end)
2121                         cur++;
2122                     cur++;
2123                     while (isspace(*cur) && cur<end)
2124                         cur++;
2125                     if (isNumberish(*cur)) {
2126                         end=cur;
2127                         while (*end && (*end!='}') && (*end!=',') && (*end!='\n'))
2128                             end++;
2129                         QString rawValue = FROM_LATIN1(cur, end-cur).simplifyWhiteSpace();
2130                         reg->rawValue = rawValue;
2131
2132                         if (rawValue.left(2)=="0x") {
2133                             // ok we have a raw value, now get it's type
2134                             end=cur-1;
2135                             while (isspace(*end) || *end=='=') end--;
2136                             end++;
2137                             cur=end-1;
2138                             while (*cur!='{' && *cur!=' ')
2139                                 cur--;
2140                             cur++;
2141                             reg->type=FROM_LATIN1(cur, end-cur);
2142                         }
2143
2144                         // end while loop
2145                         cur=end;
2146                     }
2147                 }
2148                 // skip to the end of line
2149                 while (*output != '\0' && *output != '\n')
2150                     output++;
2151                 // get rid of the braces at the begining and the end
2152                 value.remove(0, 1);
2153                 if (value[value.length()-1] == '}') {
2154                     value = value.left(value.length()-1);
2155                 }
2156             }
2157             reg->cookedValue = value;
2158         }
2159         else
2160         {
2161             // the rest of the line is the register value
2162             start = output;
2163             output = strchr(output,'\n');
2164             if (output == 0)
2165                 output = start + strlen(start);
2166             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2167
2168             /*
2169              * We split the raw from the cooked values. For this purpose,
2170              * we split off the first token (separated by whitespace). It
2171              * is the raw value. The remainder of the line is the cooked
2172              * value.
2173              */
2174             int pos = value.find(' ');
2175             if (pos < 0) {
2176                 reg->rawValue = value;
2177                 reg->cookedValue = QString();
2178             } else {
2179                 reg->rawValue = value.left(pos);
2180                 reg->cookedValue = value.mid(pos+1);
2181                 /*
2182                  * Some modern gdbs explicitly say: "0.1234 (raw 0x3e4567...)".
2183                  * Here the raw value is actually in the second part.
2184                  */
2185                 if (reg->cookedValue.left(5) == "(raw ") {
2186                     QString raw = reg->cookedValue.right(reg->cookedValue.length()-5);
2187                     if (raw[raw.length()-1] == ')')     /* remove closing bracket */
2188                         raw = raw.left(raw.length()-1);
2189                     reg->cookedValue = reg->rawValue;
2190                     reg->rawValue = raw;
2191                 }
2192             }
2193         }
2194         if (*output != '\0')
2195             output++;                   /* skip '\n' */
2196
2197         regs.append(reg);
2198     }
2199 }
2200
2201 bool GdbDriver::parseInfoLine(const char* output, QString& addrFrom, QString& addrTo)
2202 {
2203     // "is at address" or "starts at address"
2204     const char* start = strstr(output, "s at address ");
2205     if (start == 0)
2206         return false;
2207
2208     start += 13;
2209     const char* p = start;
2210     while (*p != '\0' && !isspace(*p))
2211         p++;
2212     addrFrom = FROM_LATIN1(start, p-start);
2213
2214     start = strstr(p, "and ends at ");
2215     if (start == 0) {
2216         addrTo = addrFrom;
2217         return true;
2218     }
2219
2220     start += 12;
2221     p = start;
2222     while (*p != '\0' && !isspace(*p))
2223         p++;
2224     addrTo = FROM_LATIN1(start, p-start);
2225
2226     return true;
2227 }
2228
2229 void GdbDriver::parseDisassemble(const char* output, QList<DisassembledCode>& code)
2230 {
2231     code.clear();
2232
2233     if (strncmp(output, "Dump of assembler", 17) != 0) {
2234         // error message?
2235         DisassembledCode c;
2236         c.code = output;
2237         code.append(new DisassembledCode(c));
2238         return;
2239     }
2240
2241     // remove first line
2242     const char* p = strchr(output, '\n');
2243     if (p == 0)
2244         return;                         /* not a regular output */
2245
2246     p++;
2247
2248     // remove last line
2249     const char* end = strstr(output, "End of assembler");
2250     if (end == 0)
2251         end = p + strlen(p);
2252
2253     DbgAddr address;
2254
2255     // remove function offsets from the lines
2256     while (p != end)
2257     {
2258         const char* start = p;
2259         // address
2260         while (p != end && !isspace(*p))
2261             p++;
2262         address = FROM_LATIN1(start, p-start);
2263
2264         // function name (enclosed in '<>', followed by ':')
2265         while (p != end && *p != '<')
2266             p++;
2267         if (*p == '<')
2268             skipNested(p, '<', '>');
2269         if (*p == ':')
2270             p++;
2271
2272         // space until code
2273         while (p != end && isspace(*p))
2274             p++;
2275
2276         // code until end of line
2277         start = p;
2278         while (p != end && *p != '\n')
2279             p++;
2280         if (p != end)                   /* include '\n' */
2281             p++;
2282
2283         DisassembledCode* c = new DisassembledCode;
2284         c->address = address;
2285         c->code = FROM_LATIN1(start, p-start);
2286         code.append(c);
2287     }
2288 }
2289
2290 QString GdbDriver::parseMemoryDump(const char* output, QList<MemoryDump>& memdump)
2291 {
2292     if (isErrorExpr(output)) {
2293         // error; strip space
2294         QString msg = output;
2295         return msg.stripWhiteSpace();
2296     }
2297
2298     const char* p = output;             /* save typing */
2299     DbgAddr addr;
2300     QString dump;
2301
2302     // the address
2303     while (*p != 0) {
2304         const char* start = p;
2305         while (*p != '\0' && *p != ':' && !isspace(*p))
2306             p++;
2307         addr = FROM_LATIN1(start, p-start);
2308         if (*p != ':') {
2309             // parse function offset
2310             while (isspace(*p))
2311                 p++;
2312             start = p;
2313             while (*p != '\0' && !(*p == ':' && isspace(p[1])))
2314                 p++;
2315             addr.fnoffs = FROM_LATIN1(start, p-start);
2316         }
2317         if (*p == ':')
2318             p++;
2319         // skip space; this may skip a new-line char!
2320         while (isspace(*p))
2321             p++;
2322         // everything to the end of the line is the memory dump
2323         const char* end = strchr(p, '\n');
2324         if (end != 0) {
2325             dump = FROM_LATIN1(p, end-p);
2326             p = end+1;
2327         } else {
2328             dump = FROM_LATIN1(p, strlen(p));
2329             p += strlen(p);
2330         }
2331         MemoryDump* md = new MemoryDump;
2332         md->address = addr;
2333         md->dump = dump;
2334         memdump.append(md);
2335     }
2336
2337     return QString();
2338 }
2339
2340 QString GdbDriver::editableValue(VarTree* value)
2341 {
2342     const char* s = value->m_value.latin1();
2343
2344     // if the variable is a pointer value that contains a cast,
2345     // remove the cast
2346     if (*s == '(') {
2347         skipNested(s, '(', ')');
2348         // skip space
2349         while (isspace(*s))
2350             ++s;
2351     }
2352
2353 repeat:
2354     const char* start = s;
2355
2356     if (strncmp(s, "0x", 2) == 0)
2357     {
2358         s += 2;
2359         while (isxdigit(*s))
2360             ++s;
2361
2362         /*
2363          * What we saw so far might have been a reference. If so, edit the
2364          * referenced value. Otherwise, edit the pointer.
2365          */
2366         if (*s == ':') {
2367             // a reference
2368             ++s;
2369             goto repeat;
2370         }
2371         // a pointer
2372         // if it's a pointer to a string, remove the string
2373         const char* end = s;
2374         while (isspace(*s))
2375             ++s;
2376         if (*s == '"') {
2377             // a string
2378             return FROM_LATIN1(start, end-start);
2379         } else {
2380             // other pointer
2381             return FROM_LATIN1(start, strlen(start));
2382         }
2383     }
2384
2385     // else leave it unchanged (or stripped of the reference preamble)
2386     return s;
2387 }
2388
2389 QString GdbDriver::parseSetVariable(const char* output)
2390 {
2391     // if there is any output, it is an error message
2392     QString msg = output;
2393     return msg.stripWhiteSpace();
2394 }
2395
2396
2397 #include "gdbdriver.moc"