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) {
 401         // attach saved redirection
 402         strArg += m_redirect;
 403     }
 404
 405     SIZED_QString(cmdString, MAX_FMTLEN+strArg.length());
 406     cmdString.sprintf(cmds[cmd].fmt, strArg.latin1());
 407     return cmdString;
 408 }
 409
 410 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg)
 411 {
 412     assert(cmd >= 0 && cmd < NUM_CMDS);
 413     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum);
 414
 415     SIZED_QString(cmdString, MAX_FMTLEN+30);
 416
 417     cmdString.sprintf(cmds[cmd].fmt, intArg);
 418     return cmdString;
 419 }
 420
 421 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg, int intArg)
 422 {
 423     assert(cmd >= 0 && cmd < NUM_CMDS);
 424     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum ||
 425            cmds[cmd].argsNeeded == GdbCmdInfo::argNumString ||
 426            cmd == DCexamine ||
 427            cmd == DCtty);
 428
 429     normalizeStringArg(strArg);
 430
 431     SIZED_QString(cmdString, MAX_FMTLEN+30+strArg.length());
 432
 433     if (cmd == DCtty)
 434     {
 435         /*
 436          * intArg specifies which channels should be redirected to
 437          * /dev/null. It is a value or'ed together from RDNstdin,
 438          * RDNstdout, RDNstderr. We store the value for a later DCsetargs
 439          * command.
 440          *
 441          * Note: We rely on that after the DCtty a DCsetargs will follow,
 442          * which will ultimately apply the redirection.
 443          */
 444         static const char* const runRedir[8] = {
 445             "",
 446             " </dev/null",
 447             " >/dev/null",
 448             " </dev/null >/dev/null",
 449             " 2>/dev/null",
 450             " </dev/null 2>/dev/null",
 451             " >/dev/null 2>&1",
 452             " </dev/null >/dev/null 2>&1"
 453         };
 454         if (strArg.isEmpty())
 455             intArg = 7;                 /* failsafe if no tty */
 456         m_redirect = runRedir[intArg & 7];
 457
 458         return makeCmdString(DCtty, strArg);   /* note: no problem if strArg empty */
 459     }
 460
 461     if (cmd == DCexamine) {
 462         // make a format specifier from the intArg
 463         static const char size[16] = {
 464             '\0', 'b', 'h', 'w', 'g'
 465         };
 466         static const char format[16] = {
 467             '\0', 'x', 'd', 'u', 'o', 't',
 468             'a',  'c', 'f', 's', 'i'
 469         };
 470         assert(MDTsizemask == 0xf);     /* lowest 4 bits */
 471         assert(MDTformatmask == 0xf0);  /* next 4 bits */
 472         int count = 16;                 /* number of entities to print */
 473         char sizeSpec = size[intArg & MDTsizemask];
 474         char formatSpec = format[(intArg & MDTformatmask) >> 4];
 475         assert(sizeSpec != '\0');
 476         assert(formatSpec != '\0');
 477         // adjust count such that 16 lines are printed
 478         switch (intArg & MDTformatmask) {
 479         case MDTstring: case MDTinsn:
 480             break;                      /* no modification needed */
 481         default:
 482             // all cases drop through:
 483             switch (intArg & MDTsizemask) {
 484             case MDTbyte:
 485             case MDThalfword:
 486                 count *= 2;
 487             case MDTword:
 488                 count *= 2;
 489             case MDTgiantword:
 490                 count *= 2;
 491             }
 492             break;
 493         }
 494         QString spec;
 495         spec.sprintf("/%d%c%c", count, sizeSpec, formatSpec);
 496
 497         return makeCmdString(DCexamine, spec, strArg);
 498     }
 499
 500     if (cmds[cmd].argsNeeded == GdbCmdInfo::argStringNum)
 501     {
 502         // line numbers are zero-based
 503         if (cmd == DCuntil || cmd == DCbreakline ||
 504             cmd == DCtbreakline || cmd == DCinfoline)
 505         {
 506             intArg++;
 507         }
 508         if (cmd == DCinfoline)
 509         {
 510             // must split off file name part
 511             int slash = strArg.findRev('/');
 512             if (slash >= 0)
 513                 strArg = strArg.right(strArg.length()-slash-1);
 514         }
 515         cmdString.sprintf(cmds[cmd].fmt, strArg.latin1(), intArg);
 516     }
 517     else
 518     {
 519         cmdString.sprintf(cmds[cmd].fmt, intArg, strArg.latin1());
 520     }
 521     return cmdString;
 522 }
 523
 524 QString GdbDriver::makeCmdString(DbgCommand cmd, QString strArg1, QString strArg2)
 525 {
 526     assert(cmd >= 0 && cmd < NUM_CMDS);
 527     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argString2);
 528
 529     normalizeStringArg(strArg1);
 530     normalizeStringArg(strArg2);
 531
 532     SIZED_QString(cmdString, MAX_FMTLEN+strArg1.length()+strArg2.length());
 533     cmdString.sprintf(cmds[cmd].fmt, strArg1.latin1(), strArg2.latin1());
 534     return cmdString;
 535 }
 536
 537 QString GdbDriver::makeCmdString(DbgCommand cmd, int intArg1, int intArg2)
 538 {
 539     assert(cmd >= 0 && cmd < NUM_CMDS);
 540     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNum2);
 541
 542     SIZED_QString(cmdString, MAX_FMTLEN+60);
 543     cmdString.sprintf(cmds[cmd].fmt, intArg1, intArg2);
 544     return cmdString;
 545 }
 546
 547 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, bool clearLow)
 548 {
 549     assert(cmd >= 0 && cmd < NUM_CMDS);
 550     assert(cmds[cmd].argsNeeded == GdbCmdInfo::argNone);
 551
 552     if (cmd == DCrun) {
 553         m_haveCoreFile = false;
 554     }
 555
 556     return executeCmdString(cmd, cmds[cmd].fmt, clearLow);
 557 }
 558
 559 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg,
 560                                     bool clearLow)
 561 {
 562     return executeCmdString(cmd, makeCmdString(cmd, strArg), clearLow);
 563 }
 564
 565 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg,
 566                                     bool clearLow)
 567 {
 568
 569     return executeCmdString(cmd, makeCmdString(cmd, intArg), clearLow);
 570 }
 571
 572 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg, int intArg,
 573                                     bool clearLow)
 574 {
 575     return executeCmdString(cmd, makeCmdString(cmd, strArg, intArg), clearLow);
 576 }
 577
 578 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 579                                     bool clearLow)
 580 {
 581     return executeCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), clearLow);
 582 }
 583
 584 CmdQueueItem* GdbDriver::executeCmd(DbgCommand cmd, int intArg1, int intArg2,
 585                                     bool clearLow)
 586 {
 587     return executeCmdString(cmd, makeCmdString(cmd, intArg1, intArg2), clearLow);
 588 }
 589
 590 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QueueMode mode)
 591 {
 592     return queueCmdString(cmd, cmds[cmd].fmt, mode);
 593 }
 594
 595 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg,
 596                                   QueueMode mode)
 597 {
 598     return queueCmdString(cmd, makeCmdString(cmd, strArg), mode);
 599 }
 600
 601 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, int intArg,
 602                                   QueueMode mode)
 603 {
 604     return queueCmdString(cmd, makeCmdString(cmd, intArg), mode);
 605 }
 606
 607 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg, int intArg,
 608                                   QueueMode mode)
 609 {
 610     return queueCmdString(cmd, makeCmdString(cmd, strArg, intArg), mode);
 611 }
 612
 613 CmdQueueItem* GdbDriver::queueCmd(DbgCommand cmd, QString strArg1, QString strArg2,
 614                                   QueueMode mode)
 615 {
 616     return queueCmdString(cmd, makeCmdString(cmd, strArg1, strArg2), mode);
 617 }
 618
 619 void GdbDriver::terminate()
 620 {
 621     kill(SIGTERM);
 622     m_state = DSidle;
 623 }
 624
 625 void GdbDriver::detachAndTerminate()
 626 {
 627     kill(SIGINT);
 628     flushCommands();
 629     executeCmdString(DCinitialize, "detach\nquit\n", true);
 630 }
 631
 632 void GdbDriver::interruptInferior()
 633 {
 634     kill(SIGINT);
 635     // remove accidentally queued commands
 636     flushHiPriQueue();
 637 }
 638
 639 static bool isErrorExpr(const char* output)
 640 {
 641     return
 642         strncmp(output, "Cannot access memory at", 23) == 0 ||
 643         strncmp(output, "Attempt to dereference a generic pointer", 40) == 0 ||
 644         strncmp(output, "Attempt to take contents of ", 28) == 0 ||
 645         strncmp(output, "Attempt to use a type name as an expression", 43) == 0 ||
 646         strncmp(output, "There is no member or method named", 34) == 0 ||
 647         strncmp(output, "A parse error in expression", 27) == 0 ||
 648         strncmp(output, "No symbol \"", 11) == 0 ||
 649         strncmp(output, "Internal error: ", 16) == 0;
 650 }
 651
 652 /**
 653  * Returns true if the output is an error message. If wantErrorValue is
 654  * true, a new VarTree object is created and filled with the error message.
 655  * If there are warnings, they are skipped and output points past the warnings
 656  * on return (even if there \e are errors).
 657  */
 658 static bool parseErrorMessage(const char*& output,
 659                               VarTree*& variable, bool wantErrorValue)
 660 {
 661     // skip warnings
 662     while (strncmp(output, "warning:", 8) == 0)
 663     {
 664         char* end = strchr(output+8, '\n');
 665         if (end == 0)
 666             output += strlen(output);
 667         else
 668             output = end+1;
 669     }
 670
 671     if (isErrorExpr(output))
 672     {
 673         if (wantErrorValue) {
 674             // put the error message as value in the variable
 675             variable = new VarTree(QString(), VarTree::NKplain);
 676             const char* endMsg = strchr(output, '\n');
 677             if (endMsg == 0)
 678                 endMsg = output + strlen(output);
 679             variable->m_value = FROM_LATIN1(output, endMsg-output);
 680         } else {
 681             variable = 0;
 682         }
 683         return true;
 684     }
 685     return false;
 686 }
 687
 688 #if QT_VERSION >= 300
 689 union Qt2QChar {
 690     short s;
 691     struct {
 692         uchar row;
 693         uchar cell;
 694     } qch;
 695 };
 696 #endif
 697
 698 void GdbDriver::setPrintQStringDataCmd(const char* cmd)
 699 {
 700     // don't accept the command if it is empty
 701     if (cmd == 0 || *cmd == '\0')
 702         return;
 703     assert(strlen(cmd) <= MAX_FMTLEN);
 704     cmds[DCprintQStringStruct].fmt = cmd;
 705 }
 706
 707 VarTree* GdbDriver::parseQCharArray(const char* output, bool wantErrorValue, bool qt3like)
 708 {
 709     VarTree* variable = 0;
 710
 711     /*
 712      * Parse off white space. gdb sometimes prints white space first if the
 713      * printed array leaded to an error.
 714      */
 715     while (isspace(*output))
 716         output++;
 717
 718     // special case: empty string (0 repetitions)
 719     if (strncmp(output, "Invalid number 0 of repetitions", 31) == 0)
 720     {
 721         variable = new VarTree(QString(), VarTree::NKplain);
 722         variable->m_value = "\"\"";
 723         return variable;
 724     }
 725
 726     // check for error conditions
 727     if (parseErrorMessage(output, variable, wantErrorValue))
 728         return variable;
 729
 730     // parse the array
 731
 732     // find '='
 733     const char* p = output;
 734     p = strchr(p, '=');
 735     if (p == 0) {
 736         goto error;
 737     }
 738     // skip white space
 739     do {
 740         p++;
 741     } while (isspace(*p));
 742
 743     if (*p == '{')
 744     {
 745         // this is the real data
 746         p++;                            /* skip '{' */
 747
 748         // parse the array
 749         QString result;
 750         QString repeatCount;
 751         enum { wasNothing, wasChar, wasRepeat } lastThing = wasNothing;
 752         /*
 753          * A matrix for separators between the individual "things"
 754          * that are added to the string. The first index is a bool,
 755          * the second index is from the enum above.
 756          */
 757         static const char* separator[2][3] = {
 758             { "\"", 0,       ", \"" },  /* normal char is added */
 759             { "'",  "\", '", ", '" }    /* repeated char is added */
 760         };
 761
 762         while (isdigit(*p)) {
 763             // parse a number
 764             char* end;
 765             unsigned short value = (unsigned short) strtoul(p, &end, 0);
 766             if (end == p)
 767                 goto error;             /* huh? no valid digits */
 768             // skip separator and search for a repeat count
 769             p = end;
 770             while (isspace(*p) || *p == ',')
 771                 p++;
 772             bool repeats = strncmp(p, "<repeats ", 9) == 0;
 773             if (repeats) {
 774                 const char* start = p;
 775                 p = strchr(p+9, '>');   /* search end and advance */
 776                 if (p == 0)
 777                     goto error;
 778                 p++;                    /* skip '>' */
 779                 repeatCount = FROM_LATIN1(start, p-start);
 780                 while (isspace(*p) || *p == ',')
 781                     p++;
 782             }
 783             // p is now at the next char (or the end)
 784
 785             // interpret the value as a QChar
 786             // TODO: make cross-architecture compatible
 787             QChar ch;
 788             if (qt3like) {
 789                 ch = QChar(value);
 790             } else {
 791 #if QT_VERSION < 300
 792                 (unsigned short&)ch = value;
 793 #else
 794                 Qt2QChar c;
 795                 c.s = value;
 796                 ch.setRow(c.qch.row);
 797                 ch.setCell(c.qch.cell);
 798 #endif
 799             }
 800
 801             // escape a few frequently used characters
 802             char escapeCode = '\0';
 803             switch (ch.latin1()) {
 804             case '\n': escapeCode = 'n'; break;
 805             case '\r': escapeCode = 'r'; break;
 806             case '\t': escapeCode = 't'; break;
 807             case '\b': escapeCode = 'b'; break;
 808             case '\"': escapeCode = '\"'; break;
 809             case '\\': escapeCode = '\\'; break;
 810             case '\0': if (value == 0) { escapeCode = '0'; } break;
 811             }
 812
 813             // add separator
 814             result += separator[repeats][lastThing];
 815             // add char
 816             if (escapeCode != '\0') {
 817                 result += '\\';
 818                 ch = escapeCode;
 819             }
 820             result += ch;
 821
 822             // fixup repeat count and lastThing
 823             if (repeats) {
 824                 result += "' ";
 825                 result += repeatCount;
 826                 lastThing = wasRepeat;
 827             } else {
 828                 lastThing = wasChar;
 829             }
 830         }
 831         if (*p != '}')
 832             goto error;
 833
 834         // closing quote
 835         if (lastThing == wasChar)
 836             result += "\"";
 837
 838         // assign the value
 839         variable = new VarTree(QString(), VarTree::NKplain);
 840         variable->m_value = result;
 841     }
 842     else if (strncmp(p, "true", 4) == 0)
 843     {
 844         variable = new VarTree(QString(), VarTree::NKplain);
 845         variable->m_value = "QString::null";
 846     }
 847     else if (strncmp(p, "false", 5) == 0)
 848     {
 849         variable = new VarTree(QString(), VarTree::NKplain);
 850         variable->m_value = "(null)";
 851     }
 852     else
 853         goto error;
 854     return variable;
 855
 856 error:
 857     if (wantErrorValue) {
 858         variable = new VarTree(QString(), VarTree::NKplain);
 859         variable->m_value = "internal parse error";
 860     }
 861     return variable;
 862 }
 863
 864 static VarTree* parseVar(const char*& s)
 865 {
 866     const char* p = s;
 867
 868     // skip whitespace
 869     while (isspace(*p))
 870         p++;
 871
 872     QString name;
 873     VarTree::NameKind kind;
 874     if (!parseName(p, name, kind)) {
 875         return 0;
 876     }
 877
 878     // go for '='
 879     while (isspace(*p))
 880         p++;
 881     if (*p != '=') {
 882         TRACE(QString().sprintf("parse error: = not found after %s", (const char*)name));
 883         return 0;
 884     }
 885     // skip the '=' and more whitespace
 886     p++;
 887     while (isspace(*p))
 888         p++;
 889
 890     VarTree* variable = new VarTree(name, kind);
 891     variable->setDeleteChildren(true);
 892
 893     if (!parseValue(p, variable)) {
 894         delete variable;
 895         return 0;
 896     }
 897     s = p;
 898     return variable;
 899 }
 900
 901 static void skipNested(const char*& s, char opening, char closing)
 902 {
 903     const char* p = s;
 904
 905     // parse a nested type
 906     int nest = 1;
 907     p++;
 908     /*
 909      * Search for next matching `closing' char, skipping nested pairs of
 910      * `opening' and `closing'.
 911      */
 912     while (*p && nest > 0) {
 913         if (*p == opening) {
 914             nest++;
 915         } else if (*p == closing) {
 916             nest--;
 917         }
 918         p++;
 919     }
 920     if (nest != 0) {
 921         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
 922     }
 923     s = p;
 924 }
 925
 926 /**
 927  * This function skips text that is delimited by nested angle bracktes, '<>'.
 928  * A complication arises because the delimited text can contain the names of
 929  * operator<<, operator>>, operator<, and operator>, which have to be treated
 930  * specially so that they do not count towards the nesting of '<>'.
 931  * This function assumes that the delimited text does not contain strings.
 932  */
 933 static void skipNestedAngles(const char*& s)
 934 {
 935     const char* p = s;
 936
 937     int nest = 1;
 938     p++;                // skip the initial '<'
 939     while (*p && nest > 0)
 940     {
 941         // Below we can check for p-s >= 9 instead of 8 because
 942         // *s is '<' and cannot be part of "operator".
 943         if (*p == '<')
 944         {
 945             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 946                 if (p[1] == '<')
 947                     p++;
 948             } else {
 949                 nest++;
 950             }
 951         }
 952         else if (*p == '>')
 953         {
 954             if (p-s >= 9 && strncmp(p-8, "operator", 8) == 0) {
 955                 if (p[1] == '>')
 956                     p++;
 957             } else {
 958                 nest--;
 959             }
 960         }
 961         p++;
 962     }
 963     if (nest != 0) {
 964         TRACE(QString().sprintf("parse error: mismatching <> at %-20.20s", s));
 965     }
 966     s = p;
 967 }
 968
 969 /**
 970  * Find the end of line that is not inside braces
 971  */
 972 static void findEnd(const char*& s)
 973 {
 974     const char* p = s;
 975     while (*p && *p!='\n') {
 976         while (*p && *p!='\n' && *p!='{')
 977             p++;
 978         if (*p=='{') {
 979             p++;
 980             skipNested(p, '{', '}'); p--;
 981         }
 982     }
 983     s = p;
 984 }
 985
 986 static bool isNumberish(const char ch)
 987 {
 988     return (ch>='0' && ch<='9') || ch=='.' || ch=='x';
 989 }
 990
 991 void skipString(const char*& p)
 992 {
 993 moreStrings:
 994     // opening quote
 995     char quote = *p++;
 996     while (*p != quote) {
 997         if (*p == '\\') {
 998             // skip escaped character
 999             // no special treatment for octal values necessary
1000             p++;
1001         }
1002         // simply return if no more characters
1003         if (*p == '\0')
1004             return;
1005         p++;
1006     }
1007     // closing quote
1008     p++;
1009     /*
1010      * Strings can consist of several parts, some of which contain repeated
1011      * characters.
1012      */
1013     if (quote == '\'') {
1014         // look ahaead for <repeats 123 times>
1015         const char* q = p+1;
1016         while (isspace(*q))
1017             q++;
1018         if (strncmp(q, "<repeats ", 9) == 0) {
1019             p = q+9;
1020             while (*p != '\0' && *p != '>')
1021                 p++;
1022             if (*p != '\0') {
1023                 p++;                    /* skip the '>' */
1024             }
1025         }
1026     }
1027     // is the string continued?
1028     if (*p == ',') {
1029         // look ahead for another quote
1030         const char* q = p+1;
1031         while (isspace(*q))
1032             q++;
1033         if (*q == '"' || *q == '\'') {
1034             // yes!
1035             p = q;
1036             goto moreStrings;
1037         }
1038     }
1039     /* very long strings are followed by `...' */
1040     if (*p == '.' && p[1] == '.' && p[2] == '.') {
1041         p += 3;
1042     }
1043 }
1044
1045 static void skipNestedWithString(const char*& s, char opening, char closing)
1046 {
1047     const char* p = s;
1048
1049     // parse a nested expression
1050     int nest = 1;
1051     p++;
1052     /*
1053      * Search for next matching `closing' char, skipping nested pairs of
1054      * `opening' and `closing' as well as strings.
1055      */
1056     while (*p && nest > 0) {
1057         if (*p == opening) {
1058             nest++;
1059         } else if (*p == closing) {
1060             nest--;
1061         } else if (*p == '\'' || *p == '\"') {
1062             skipString(p);
1063             continue;
1064         }
1065         p++;
1066     }
1067     if (nest > 0) {
1068         TRACE(QString().sprintf("parse error: mismatching %c%c at %-20.20s", opening, closing, s));
1069     }
1070     s = p;
1071 }
1072
1073 inline void skipName(const char*& p)
1074 {
1075     // allow : (for enumeration values) and $ and . (for _vtbl.)
1076     while (isalnum(*p) || *p == '_' || *p == ':' || *p == '$' || *p == '.')
1077         p++;
1078 }
1079
1080 static bool parseName(const char*& s, QString& name, VarTree::NameKind& kind)
1081 {
1082     kind = VarTree::NKplain;
1083
1084     const char* p = s;
1085     // examples of names:
1086     //  name
1087     //  <Object>
1088     //  <string<a,b<c>,7> >
1089
1090     if (*p == '<') {
1091         skipNestedAngles(p);
1092         name = FROM_LATIN1(s, p - s);
1093         kind = VarTree::NKtype;
1094     }
1095     else
1096     {
1097         // name, which might be "static"; allow dot for "_vtbl."
1098         skipName(p);
1099         if (p == s) {
1100             TRACE(QString().sprintf("parse error: not a name %-20.20s", s));
1101             return false;
1102         }
1103         int len = p - s;
1104         if (len == 6 && strncmp(s, "static", 6) == 0) {
1105             kind = VarTree::NKstatic;
1106
1107             // its a static variable, name comes now
1108             while (isspace(*p))
1109                 p++;
1110             s = p;
1111             skipName(p);
1112             if (p == s) {
1113                 TRACE(QString().sprintf("parse error: not a name after static %-20.20s", s));
1114                 return false;
1115             }
1116             len = p - s;
1117         }
1118         name = FROM_LATIN1(s, len);
1119     }
1120     // return the new position
1121     s = p;
1122     return true;
1123 }
1124
1125 static bool parseValue(const char*& s, VarTree* variable)
1126 {
1127     variable->m_value = "";
1128
1129 repeat:
1130     if (*s == '{') {
1131         // Sometimes we find the following output:
1132         //  {<text variable, no debug info>} 0x40012000 <access>
1133         //  {<data variable, no debug info>}
1134         //  {<variable (not text or data), no debug info>}
1135         if (strncmp(s, "{<text variable, ", 17) == 0 ||
1136             strncmp(s, "{<data variable, ", 17) == 0 ||
1137             strncmp(s, "{<variable (not text or data), ", 31) == 0)
1138         {
1139             const char* start = s;
1140             skipNested(s, '{', '}');
1141             variable->m_value = FROM_LATIN1(start, s-start);
1142             variable->m_value += ' ';   // add only a single space
1143             while (isspace(*s))
1144                 s++;
1145             goto repeat;
1146         }
1147         else
1148         {
1149             s++;
1150             if (!parseNested(s, variable)) {
1151                 return false;
1152             }
1153             // must be the closing brace
1154             if (*s != '}') {
1155                 TRACE("parse error: missing } of " +  variable->getText());
1156                 return false;
1157             }
1158             s++;
1159             // final white space
1160             while (isspace(*s))
1161                 s++;
1162         }
1163     } else {
1164         // examples of leaf values (cannot be the empty string):
1165         //  123
1166         //  -123
1167         //  23.575e+37
1168         //  0x32a45
1169         //  @0x012ab4
1170         //  (DwContentType&) @0x8123456: {...}
1171         //  0x32a45 "text"
1172         //  10 '\n'
1173         //  <optimized out>
1174         //  0x823abc <Array<int> virtual table>
1175         //  (void (*)()) 0x8048480 <f(E *, char)>
1176         //  (E *) 0xbffff450
1177         //  red
1178         //  &parseP (HTMLClueV *, char *)
1179         //  Variable "x" is not available.
1180         //  The value of variable 'x' is distributed...
1181         //  -nan(0xfffff081defa0)
1182
1183         const char*p = s;
1184
1185         // check for type
1186         QString type;
1187         if (*p == '(') {
1188             skipNested(p, '(', ')');
1189
1190             while (isspace(*p))
1191                 p++;
1192             variable->m_value = FROM_LATIN1(s, p - s);
1193         }
1194
1195         bool reference = false;
1196         if (*p == '@') {
1197             // skip reference marker
1198             p++;
1199             reference = true;
1200         }
1201         const char* start = p;
1202         if (*p == '-')
1203             p++;
1204
1205         // some values consist of more than one token
1206         bool checkMultiPart = false;
1207
1208         if (p[0] == '0' && p[1] == 'x') {
1209             // parse hex number
1210             p += 2;
1211             while (isxdigit(*p))
1212                 p++;
1213
1214             /*
1215              * Assume this is a pointer, but only if it's not a reference, since
1216              * references can't be expanded.
1217              */
1218             if (!reference) {
1219                 variable->m_varKind = VarTree::VKpointer;
1220             } else {
1221                 /*
1222                  * References are followed by a colon, in which case we'll
1223                  * find the value following the reference address.
1224                  */
1225                 if (*p == ':') {
1226                     p++;
1227                 } else {
1228                     // Paranoia. (Can this happen, i.e. reference not followed by ':'?)
1229                     reference = false;
1230                 }
1231             }
1232             checkMultiPart = true;
1233         } else if (isdigit(*p)) {
1234             // parse decimal number, possibly a float
1235             while (isdigit(*p))
1236                 p++;
1237             if (*p == '.') {            /* TODO: obey i18n? */
1238                 // In long arrays an integer may be followed by '...'.
1239                 // We test for this situation and don't gobble the '...'.
1240                 if (p[1] != '.' || p[0] != '.') {
1241                     // fractional part
1242                     p++;
1243                     while (isdigit(*p))
1244                         p++;
1245                 }
1246             }
1247             if (*p == 'e' || *p == 'E') {
1248                 p++;
1249                 // exponent
1250                 if (*p == '-' || *p == '+')
1251                     p++;
1252                 while (isdigit(*p))
1253                     p++;
1254             }
1255
1256             // for char variables there is the char, eg. 10 '\n'
1257             checkMultiPart = true;
1258         } else if (*p == '<') {
1259             // e.g. <optimized out>
1260             skipNestedAngles(p);
1261         } else if (*p == '"' || *p == '\'') {
1262             // character may have multipart: '\000' <repeats 11 times>
1263             checkMultiPart = *p == '\'';
1264             // found a string
1265             skipString(p);
1266         } else if (*p == '&') {
1267             // function pointer
1268             p++;
1269             skipName(p);
1270             while (isspace(*p)) {
1271                 p++;
1272             }
1273             if (*p == '(') {
1274                 skipNested(p, '(', ')');
1275             }
1276         } else if (strncmp(p, "Variable \"", 10) == 0) {
1277             // Variable "x" is not available.
1278             p += 10;            // skip to "
1279             skipName(p);
1280             if (strncmp(p, "\" is not available.", 19) == 0) {
1281                 p += 19;
1282             }
1283         } else if (strncmp(p, "The value of variable '", 23) == 0) {
1284             p += 23;
1285             skipName(p);
1286             const char* e = strchr(p, '.');
1287             if (e == 0) {
1288                 p += strlen(p);
1289             } else {
1290                 p = e+1;
1291             }
1292         } else {
1293             // must be an enumeration value
1294             skipName(p);
1295             // hmm, not necessarily: nan (floating point Not a Number)
1296             // is followed by a number in ()
1297             if (*p == '(')
1298                 skipNested(p, '(', ')');
1299         }
1300         variable->m_value += FROM_LATIN1(start, p - start);
1301
1302         // remove line breaks from the value; this is ok since
1303         // string values never contain a literal line break
1304         variable->m_value.replace('\n', ' ');
1305
1306         if (checkMultiPart) {
1307             // white space
1308             while (isspace(*p))
1309                 p++;
1310             // may be followed by a string or <...>
1311             start = p;
1312
1313             if (*p == '"' || *p == '\'') {
1314                 skipString(p);
1315             } else if (*p == '<') {
1316                 // if this value is part of an array, it might be followed
1317                 // by <repeats 15 times>, which we don't skip here
1318                 if (strncmp(p, "<repeats ", 9) != 0)
1319                     skipNestedAngles(p);
1320             }
1321             if (p != start) {
1322                 // there is always a blank before the string,
1323                 // which we will include in the final string value
1324                 variable->m_value += FROM_LATIN1(start-1, (p - start)+1);
1325                 // if this was a pointer, reset that flag since we
1326                 // now got the value
1327                 variable->m_varKind = VarTree::VKsimple;
1328             }
1329         }
1330
1331         if (variable->m_value.length() == 0) {
1332             TRACE("parse error: no value for " + variable->getText());
1333             return false;
1334         }
1335
1336         // final white space
1337         while (isspace(*p))
1338             p++;
1339         s = p;
1340
1341         /*
1342          * If this was a reference, the value follows. It might even be a
1343          * composite variable!
1344          */
1345         if (reference) {
1346             goto repeat;
1347         }
1348
1349         if (variable->m_varKind == VarTree::VKpointer) {
1350             variable->setDelayedExpanding(true);
1351         }
1352     }
1353
1354     return true;
1355 }
1356
1357 static bool parseNested(const char*& s, VarTree* variable)
1358 {
1359     // could be a structure or an array
1360     while (isspace(*s))
1361         s++;
1362
1363     const char* p = s;
1364     bool isStruct = false;
1365     /*
1366      * If there is a name followed by an = or an < -- which starts a type
1367      * name -- or "static", it is a structure
1368      */
1369     if (*p == '<' || *p == '}') {
1370         isStruct = true;
1371     } else if (strncmp(p, "static ", 7) == 0) {
1372         isStruct = true;
1373     } else if (isalpha(*p) || *p == '_' || *p == '$') {
1374         // look ahead for a comma after the name
1375         skipName(p);
1376         while (isspace(*p))
1377             p++;
1378         if (*p == '=') {
1379             isStruct = true;
1380         }
1381         p = s;                          /* rescan the name */
1382     }
1383     if (isStruct) {
1384         if (!parseVarSeq(p, variable)) {
1385             return false;
1386         }
1387         variable->m_varKind = VarTree::VKstruct;
1388     } else {
1389         if (!parseValueSeq(p, variable)) {
1390             return false;
1391         }
1392         variable->m_varKind = VarTree::VKarray;
1393     }
1394     s = p;
1395     return true;
1396 }
1397
1398 static bool parseVarSeq(const char*& s, VarTree* variable)
1399 {
1400     // parse a comma-separated sequence of variables
1401     VarTree* var = variable;            /* var != 0 to indicate success if empty seq */
1402     for (;;) {
1403         if (*s == '}')
1404             break;
1405         if (strncmp(s, "<No data fields>}", 17) == 0)
1406         {
1407             // no member variables, so break out immediately
1408             s += 16;                    /* go to the closing brace */
1409             break;
1410         }
1411         var = parseVar(s);
1412         if (var == 0)
1413             break;                      /* syntax error */
1414         variable->appendChild(var);
1415         if (*s != ',')
1416             break;
1417         // skip the comma and whitespace
1418         s++;
1419         while (isspace(*s))
1420             s++;
1421     }
1422     return var != 0;
1423 }
1424
1425 static bool parseValueSeq(const char*& s, VarTree* variable)
1426 {
1427     // parse a comma-separated sequence of variables
1428     int index = 0;
1429     bool good;
1430     for (;;) {
1431         QString name;
1432         name.sprintf("[%d]", index);
1433         VarTree* var = new VarTree(name, VarTree::NKplain);
1434         var->setDeleteChildren(true);
1435         good = parseValue(s, var);
1436         if (!good) {
1437             delete var;
1438             return false;
1439         }
1440         // a value may be followed by "<repeats 45 times>"
1441         if (strncmp(s, "<repeats ", 9) == 0) {
1442             s += 9;
1443             char* end;
1444             int l = strtol(s, &end, 10);
1445             if (end == s || strncmp(end, " times>", 7) != 0) {
1446                 // should not happen
1447                 delete var;
1448                 return false;
1449             }
1450             TRACE(QString().sprintf("found <repeats %d times> in array", l));
1451             // replace name and advance index
1452             name.sprintf("[%d .. %d]", index, index+l-1);
1453             var->setText(name);
1454             index += l;
1455             // skip " times>" and space
1456             s = end+7;
1457             // possible final space
1458             while (isspace(*s))
1459                 s++;
1460         } else {
1461             index++;
1462         }
1463         variable->appendChild(var);
1464         // long arrays may be terminated by '...'
1465         if (strncmp(s, "...", 3) == 0) {
1466             s += 3;
1467             VarTree* var = new VarTree("...", VarTree::NKplain);
1468             var->setDeleteChildren(true);
1469             var->m_value = i18n("<additional entries of the array suppressed>");
1470             variable->appendChild(var);
1471             break;
1472         }
1473         if (*s != ',') {
1474             break;
1475         }
1476         // skip the comma and whitespace
1477         s++;
1478         while (isspace(*s))
1479             s++;
1480         // sometimes there is a closing brace after a comma
1481 //      if (*s == '}')
1482 //          break;
1483     }
1484     return true;
1485 }
1486
1487 /**
1488  * Parses a stack frame.
1489  */
1490 static void parseFrameInfo(const char*& s, QString& func,
1491                            QString& file, int& lineNo, DbgAddr& address)
1492 {
1493     const char* p = s;
1494
1495     // next may be a hexadecimal address
1496     if (*p == '0') {
1497         const char* start = p;
1498         p++;
1499         if (*p == 'x')
1500             p++;
1501         while (isxdigit(*p))
1502             p++;
1503         address = FROM_LATIN1(start, p-start);
1504         if (strncmp(p, " in ", 4) == 0)
1505             p += 4;
1506     } else {
1507         address = DbgAddr();
1508     }
1509     const char* start = p;
1510     // check for special signal handler frame
1511     if (strncmp(p, "<signal handler called>", 23) == 0) {
1512         func = FROM_LATIN1(start, 23);
1513         file = QString();
1514         lineNo = -1;
1515         s = p+23;
1516         if (*s == '\n')
1517             s++;
1518         return;
1519     }
1520
1521     /*
1522      * Skip the function name. It is terminated by a left parenthesis
1523      * which does not delimit "(anonymous namespace)" and which is
1524      * outside the angle brackets <> of template parameter lists.
1525      */
1526     while (*p != '\0')
1527     {
1528         if (*p == '<') {
1529             // check for operator<< and operator<
1530             if (p-start >= 8 && strncmp(p-8, "operator", 8) == 0)
1531             {
1532                 p++;
1533                 if (*p == '<')
1534                     p++;
1535             }
1536             else
1537             {
1538                 // skip template parameter list
1539                 skipNestedAngles(p);
1540             }
1541         } else if (*p == '(') {
1542             if (strncmp(p, "(anonymous namespace)", 21) != 0)
1543                 break;  // parameter list found
1544             p += 21;
1545         } else {
1546             p++;
1547         }
1548     }
1549
1550     if (*p == '\0') {
1551         func = start;
1552         file = QString();
1553         lineNo = -1;
1554         s = p;
1555         return;
1556     }
1557     /*
1558      * Skip parameters. But notice that for complicated conversion
1559      * functions (eg. "operator int(**)()()", ie. convert to pointer to
1560      * pointer to function) as well as operator()(...) we have to skip
1561      * additional pairs of parentheses. Furthermore, recent gdbs write the
1562      * demangled name followed by the arguments in a pair of parentheses,
1563      * where the demangled name can end in "const".
1564      */
1565     do {
1566         skipNestedWithString(p, '(', ')');
1567         while (isspace(*p))
1568             p++;
1569         // skip "const"
1570         if (strncmp(p, "const", 5) == 0) {
1571             p += 5;
1572             while (isspace(*p))
1573                 p++;
1574         }
1575     } while (*p == '(');
1576
1577     // check for file position
1578     if (strncmp(p, "at ", 3) == 0) {
1579         p += 3;
1580         const char* fileStart = p;
1581         // go for the end of the line
1582         while (*p != '\0' && *p != '\n')
1583             p++;
1584         // search back for colon
1585         const char* colon = p;
1586         do {
1587             --colon;
1588         } while (*colon != ':');
1589         file = FROM_LATIN1(fileStart, colon-fileStart);
1590         lineNo = atoi(colon+1)-1;
1591         // skip new-line
1592         if (*p != '\0')
1593             p++;
1594     } else {
1595         // check for "from shared lib"
1596         if (strncmp(p, "from ", 5) == 0) {
1597             p += 5;
1598             // go for the end of the line
1599             while (*p != '\0' && *p != '\n')
1600                 p++;
1601             // skip new-line
1602             if (*p != '\0')
1603                 p++;
1604         }
1605         file = "";
1606         lineNo = -1;
1607     }
1608     // construct the function name (including file info)
1609     if (*p == '\0') {
1610         func = start;
1611     } else {
1612         func = FROM_LATIN1(start, p-start-1);   /* don't include \n */
1613     }
1614     s = p;
1615
1616     /*
1617      * Replace \n (and whitespace around it) in func by a blank. We cannot
1618      * use QString::simplifyWhiteSpace() for this because this would also
1619      * simplify space that belongs to a string arguments that gdb sometimes
1620      * prints in the argument lists of the function.
1621      */
1622     ASSERT(!isspace(func[0].latin1()));         /* there must be non-white before first \n */
1623     int nl = 0;
1624     while ((nl = func.find('\n', nl)) >= 0) {
1625         // search back to the beginning of the whitespace
1626         int startWhite = nl;
1627         do {
1628             --startWhite;
1629         } while (isspace(func[startWhite].latin1()));
1630         startWhite++;
1631         // search forward to the end of the whitespace
1632         do {
1633             nl++;
1634         } while (isspace(func[nl].latin1()));
1635         // replace
1636         func.replace(startWhite, nl-startWhite, " ");
1637         /* continue searching for more \n's at this place: */
1638         nl = startWhite+1;
1639     }
1640 }
1641
1642
1643 /**
1644  * Parses a stack frame including its frame number
1645  */
1646 static bool parseFrame(const char*& s, int& frameNo, QString& func,
1647                        QString& file, int& lineNo, DbgAddr& address)
1648 {
1649     // Example:
1650     //  #1  0x8048881 in Dl::Dl (this=0xbffff418, r=3214) at testfile.cpp:72
1651     //  Breakpoint 3, Cl::f(int) const (this=0xbffff3c0, x=17) at testfile.cpp:155
1652
1653     // must start with a hash mark followed by number
1654     // or with "Breakpoint " followed by number and comma
1655     if (s[0] == '#') {
1656         if (!isdigit(s[1]))
1657             return false;
1658         s++;                            /* skip the hash mark */
1659     } else if (strncmp(s, "Breakpoint ", 11) == 0) {
1660         if (!isdigit(s[11]))
1661             return false;
1662         s += 11;                        /* skip "Breakpoint" */
1663     } else
1664         return false;
1665
1666     // frame number
1667     frameNo = atoi(s);
1668     while (isdigit(*s))
1669         s++;
1670     // space and comma
1671     while (isspace(*s) || *s == ',')
1672         s++;
1673     parseFrameInfo(s, func, file, lineNo, address);
1674     return true;
1675 }
1676
1677 void GdbDriver::parseBackTrace(const char* output, QList<StackFrame>& stack)
1678 {
1679     QString func, file;
1680     int lineNo, frameNo;
1681     DbgAddr address;
1682
1683     while (::parseFrame(output, frameNo, func, file, lineNo, address)) {
1684         StackFrame* frm = new StackFrame;
1685         frm->frameNo = frameNo;
1686         frm->fileName = file;
1687         frm->lineNo = lineNo;
1688         frm->address = address;
1689         frm->var = new VarTree(func, VarTree::NKplain);
1690         stack.append(frm);
1691     }
1692 }
1693
1694 bool GdbDriver::parseFrameChange(const char* output, int& frameNo,
1695                                  QString& file, int& lineNo, DbgAddr& address)
1696 {
1697     QString func;
1698     return ::parseFrame(output, frameNo, func, file, lineNo, address);
1699 }
1700
1701
1702 bool GdbDriver::parseBreakList(const char* output, QList<Breakpoint>& brks)
1703 {
1704     // skip first line, which is the headline
1705     const char* p = strchr(output, '\n');
1706     if (p == 0)
1707         return false;
1708     p++;
1709     if (*p == '\0')
1710         return false;
1711
1712     // split up a line
1713     QString location;
1714     QString address;
1715     int hits = 0;
1716     uint ignoreCount = 0;
1717     QString condition;
1718     const char* end;
1719     char* dummy;
1720     while (*p != '\0') {
1721         // get Num
1722         long bpNum = strtol(p, &dummy, 10);     /* don't care about overflows */
1723         p = dummy;
1724         // get Type
1725         while (isspace(*p))
1726             p++;
1727         Breakpoint::Type bpType = Breakpoint::breakpoint;
1728         if (strncmp(p, "breakpoint", 10) == 0) {
1729             p += 10;
1730         } else if (strncmp(p, "hw watchpoint", 13) == 0) {
1731             bpType = Breakpoint::watchpoint;
1732             p += 13;
1733         } else if (strncmp(p, "watchpoint", 10) == 0) {
1734             bpType = Breakpoint::watchpoint;
1735             p += 10;
1736         }
1737         while (isspace(*p))
1738             p++;
1739         if (*p == '\0')
1740             break;
1741         // get Disp
1742         char disp = *p++;
1743         while (*p != '\0' && !isspace(*p))      /* "keep" or "del" */
1744             p++;
1745         while (isspace(*p))
1746             p++;
1747         if (*p == '\0')
1748             break;
1749         // get Enb
1750         char enable = *p++;
1751         while (*p != '\0' && !isspace(*p))      /* "y" or "n" */
1752             p++;
1753         while (isspace(*p))
1754             p++;
1755         if (*p == '\0')
1756             break;
1757         // the address, if present
1758         if (bpType == Breakpoint::breakpoint &&
1759             strncmp(p, "0x", 2) == 0)
1760         {
1761             const char* start = p;
1762             while (*p != '\0' && !isspace(*p))
1763                 p++;
1764             address = FROM_LATIN1(start, p-start);
1765             while (isspace(*p) && *p != '\n')
1766                 p++;
1767             if (*p == '\0')
1768                 break;
1769         } else {
1770             address = QString();
1771         }
1772         // remainder is location, hit and ignore count, condition
1773         hits = 0;
1774         ignoreCount = 0;
1775         condition = QString();
1776         end = strchr(p, '\n');
1777         if (end == 0) {
1778             location = p;
1779             p += location.length();
1780         } else {
1781             location = FROM_LATIN1(p, end-p).stripWhiteSpace();
1782             p = end+1;                  /* skip over \n */
1783         }
1784
1785         // may be continued in next line
1786         while (isspace(*p)) {   /* p points to beginning of line */
1787             // skip white space at beginning of line
1788             while (isspace(*p))
1789                 p++;
1790
1791             // seek end of line
1792             end = strchr(p, '\n');
1793             if (end == 0)
1794                 end = p+strlen(p);
1795
1796             if (strncmp(p, "breakpoint already hit", 22) == 0) {
1797                 // extract the hit count
1798                 p += 22;
1799                 hits = strtol(p, &dummy, 10);
1800                 TRACE(QString().sprintf("hit count %d", hits));
1801             } else if (strncmp(p, "stop only if ", 13) == 0) {
1802                 // extract condition
1803                 p += 13;
1804                 condition = FROM_LATIN1(p, end-p).stripWhiteSpace();
1805                 TRACE("condition: "+condition);
1806             } else if (strncmp(p, "ignore next ", 12) == 0) {
1807                 // extract ignore count
1808                 p += 12;
1809                 ignoreCount = strtol(p, &dummy, 10);
1810                 TRACE(QString().sprintf("ignore count %d", ignoreCount));
1811             } else {
1812                 // indeed a continuation
1813                 location += " " + FROM_LATIN1(p, end-p).stripWhiteSpace();
1814             }
1815             p = end;
1816             if (*p != '\0')
1817                 p++;                    /* skip '\n' */
1818         }
1819         Breakpoint* bp = new Breakpoint;
1820         bp->id = bpNum;
1821         bp->type = bpType;
1822         bp->temporary = disp == 'd';
1823         bp->enabled = enable == 'y';
1824         bp->location = location;
1825         bp->address = address;
1826         bp->hitCount = hits;
1827         bp->ignoreCount = ignoreCount;
1828         bp->condition = condition;
1829         brks.append(bp);
1830     }
1831     return true;
1832 }
1833
1834 bool GdbDriver::parseThreadList(const char* output, QList<ThreadInfo>& threads)
1835 {
1836     if (strcmp(output, "\n") == 0 || strncmp(output, "No stack.", 9) == 0) {
1837         // no threads
1838         return true;
1839     }
1840
1841     int id;
1842     QString systag;
1843     QString func, file;
1844     int lineNo;
1845     DbgAddr address;
1846
1847     const char* p = output;
1848     while (*p != '\0') {
1849         // seach look for thread id, watching out for  the focus indicator
1850         bool hasFocus = false;
1851         while (isspace(*p))             /* may be \n from prev line: see "No stack" below */
1852             p++;
1853         if (*p == '*') {
1854             hasFocus = true;
1855             p++;
1856             // there follows only whitespace
1857         }
1858         char* end;
1859         id = strtol(p, &end, 10);
1860         if (p == end) {
1861             // syntax error: no number found; bail out
1862             return true;
1863         }
1864         p = end;
1865
1866         // skip space
1867         while (isspace(*p))
1868             p++;
1869
1870         /*
1871          * Now follows the thread's SYSTAG. It is terminated by two blanks.
1872          */
1873         end = strstr(p, "  ");
1874         if (end == 0) {
1875             // syntax error; bail out
1876             return true;
1877         }
1878         systag = FROM_LATIN1(p, end-p);
1879         p = end+2;
1880
1881         /*
1882          * Now follows a standard stack frame. Sometimes, however, gdb
1883          * catches a thread at an instant where it doesn't have a stack.
1884          */
1885         if (strncmp(p, "[No stack.]", 11) != 0) {
1886             ::parseFrameInfo(p, func, file, lineNo, address);
1887         } else {
1888             func = "[No stack]";
1889             file = QString();
1890             lineNo = -1;
1891             address = QString();
1892             p += 11;                    /* \n is skipped above */
1893         }
1894
1895         ThreadInfo* thr = new ThreadInfo;
1896         thr->id = id;
1897         thr->threadName = systag;
1898         thr->hasFocus = hasFocus;
1899         thr->function = func;
1900         thr->fileName = file;
1901         thr->lineNo = lineNo;
1902         thr->address = address;
1903         threads.append(thr);
1904     }
1905     return true;
1906 }
1907
1908 static bool parseNewBreakpoint(const char* o, int& id,
1909                                QString& file, int& lineNo, QString& address);
1910 static bool parseNewWatchpoint(const char* o, int& id,
1911                                QString& expr);
1912
1913 bool GdbDriver::parseBreakpoint(const char* output, int& id,
1914                                 QString& file, int& lineNo, QString& address)
1915 {
1916     const char* o = output;
1917     // skip lines of that begin with "(Cannot find"
1918     while (strncmp(o, "(Cannot find", 12) == 0) {
1919         o = strchr(o, '\n');
1920         if (o == 0)
1921             return false;
1922         o++;                            /* skip newline */
1923     }
1924
1925     if (strncmp(o, "Breakpoint ", 11) == 0) {
1926         output += 11;                   /* skip "Breakpoint " */
1927         return ::parseNewBreakpoint(output, id, file, lineNo, address);
1928     } else if (strncmp(o, "Hardware watchpoint ", 20) == 0) {
1929         output += 20;
1930         return ::parseNewWatchpoint(output, id, address);
1931     } else if (strncmp(o, "Watchpoint ", 11) == 0) {
1932         output += 11;
1933         return ::parseNewWatchpoint(output, id, address);
1934     }
1935     return false;
1936 }
1937
1938 static bool parseNewBreakpoint(const char* o, int& id,
1939                                QString& file, int& lineNo, QString& address)
1940 {
1941     // breakpoint id
1942     char* p;
1943     id = strtoul(o, &p, 10);
1944     if (p == o)
1945         return false;
1946
1947     // check for the address
1948     if (strncmp(p, " at 0x", 6) == 0) {
1949         char* start = p+4;             /* skip " at ", but not 0x */
1950         p += 6;
1951         while (isxdigit(*p))
1952             ++p;
1953         address = FROM_LATIN1(start, p-start);
1954     }
1955
1956     // file name
1957     char* fileStart = strstr(p, "file ");
1958     if (fileStart == 0)
1959         return !address.isEmpty();     /* parse error only if there's no address */
1960     fileStart += 5;
1961
1962     // line number
1963     char* numStart = strstr(fileStart, ", line ");
1964     QString fileName = FROM_LATIN1(fileStart, numStart-fileStart);
1965     numStart += 7;
1966     int line = strtoul(numStart, &p, 10);
1967     if (numStart == p)
1968         return false;
1969
1970     file = fileName;
1971     lineNo = line-1;                    /* zero-based! */
1972     return true;
1973 }
1974
1975 static bool parseNewWatchpoint(const char* o, int& id,
1976                                QString& expr)
1977 {
1978     // watchpoint id
1979     char* p;
1980     id = strtoul(o, &p, 10);
1981     if (p == o)
1982         return false;
1983
1984     if (strncmp(p, ": ", 2) != 0)
1985         return false;
1986     p += 2;
1987
1988     // all the rest on the line is the expression
1989     expr = FROM_LATIN1(p, strlen(p)).stripWhiteSpace();
1990     return true;
1991 }
1992
1993 void GdbDriver::parseLocals(const char* output, QList<VarTree>& newVars)
1994 {
1995     // check for possible error conditions
1996     if (strncmp(output, "No symbol table", 15) == 0)
1997     {
1998         return;
1999     }
2000
2001     while (*output != '\0') {
2002         while (isspace(*output))
2003             output++;
2004         if (*output == '\0')
2005             break;
2006         // skip occurrences of "No locals" and "No args"
2007         if (strncmp(output, "No locals", 9) == 0 ||
2008             strncmp(output, "No arguments", 12) == 0)
2009         {
2010             output = strchr(output, '\n');
2011             if (output == 0) {
2012                 break;
2013             }
2014             continue;
2015         }
2016
2017         VarTree* variable = parseVar(output);
2018         if (variable == 0) {
2019             break;
2020         }
2021         // do not add duplicates
2022         for (VarTree* o = newVars.first(); o != 0; o = newVars.next()) {
2023             if (o->getText() == variable->getText()) {
2024                 delete variable;
2025                 goto skipDuplicate;
2026             }
2027         }
2028         newVars.append(variable);
2029     skipDuplicate:;
2030     }
2031 }
2032
2033 bool GdbDriver::parsePrintExpr(const char* output, bool wantErrorValue, VarTree*& var)
2034 {
2035     // check for error conditions
2036     if (parseErrorMessage(output, var, wantErrorValue))
2037     {
2038         return false;
2039     } else {
2040         // parse the variable
2041         var = parseVar(output);
2042         return true;
2043     }
2044 }
2045
2046 bool GdbDriver::parseChangeWD(const char* output, QString& message)
2047 {
2048     bool isGood = false;
2049     message = QString(output).simplifyWhiteSpace();
2050     if (message.isEmpty()) {
2051         message = i18n("New working directory: ") + m_programWD;
2052         isGood = true;
2053     }
2054     return isGood;
2055 }
2056
2057 bool GdbDriver::parseChangeExecutable(const char* output, QString& message)
2058 {
2059     message = output;
2060
2061     m_haveCoreFile = false;
2062
2063     /*
2064      * Lines starting with the following do not indicate errors:
2065      *     Using host libthread_db
2066      *     (no debugging symbols found)
2067      */
2068     while (strncmp(output, "Using host libthread_db", 23) == 0 ||
2069            strncmp(output, "(no debugging symbols found)", 28) == 0)
2070     {
2071         // this line is good, go to the next one
2072         const char* end = strchr(output, '\n');
2073         if (end == 0)
2074             output += strlen(output);
2075         else
2076             output = end+1;
2077     }
2078
2079     /*
2080      * If we've parsed all lines, there was no error.
2081      */
2082     return output[0] == '\0';
2083 }
2084
2085 bool GdbDriver::parseCoreFile(const char* output)
2086 {
2087     // if command succeeded, gdb emits a line starting with "#0 "
2088     m_haveCoreFile = strstr(output, "\n#0 ") != 0;
2089     return m_haveCoreFile;
2090 }
2091
2092 uint GdbDriver::parseProgramStopped(const char* output, QString& message)
2093 {
2094     // optionally: "program changed, rereading symbols",
2095     // followed by:
2096     // "Program exited normally"
2097     // "Program terminated with wignal SIGSEGV"
2098     // "Program received signal SIGINT" or other signal
2099     // "Breakpoint..."
2100
2101     // go through the output, line by line, checking what we have
2102     const char* start = output - 1;
2103     uint flags = SFprogramActive;
2104     message = QString();
2105     do {
2106         start++;                        /* skip '\n' */
2107
2108         if (strncmp(start, "Program ", 8) == 0 ||
2109             strncmp(start, "ptrace: ", 8) == 0) {
2110             /*
2111              * When we receive a signal, the program remains active.
2112              *
2113              * Special: If we "stopped" in a corefile, the string "Program
2114              * terminated with signal"... is displayed. (Normally, we see
2115              * "Program received signal"... when a signal happens.)
2116              */
2117             if (strncmp(start, "Program exited", 14) == 0 ||
2118                 (strncmp(start, "Program terminated", 18) == 0 && !m_haveCoreFile) ||
2119                 strncmp(start, "ptrace: ", 8) == 0)
2120             {
2121                 flags &= ~SFprogramActive;
2122             }
2123
2124             // set message
2125             const char* endOfMessage = strchr(start, '\n');
2126             if (endOfMessage == 0)
2127                 endOfMessage = start + strlen(start);
2128             message = FROM_LATIN1(start, endOfMessage-start);
2129         } else if (strncmp(start, "Breakpoint ", 11) == 0) {
2130             /*
2131              * We stopped at a (permanent) breakpoint (gdb doesn't tell us
2132              * that it stopped at a temporary breakpoint).
2133              */
2134             flags |= SFrefreshBreak;
2135         } else if (strstr(start, "re-reading symbols.") != 0) {
2136             flags |= SFrefreshSource;
2137         }
2138
2139         // next line, please
2140         start = strchr(start, '\n');
2141     } while (start != 0);
2142
2143     /*
2144      * Gdb only notices when new threads have appeared, but not when a
2145      * thread finishes. So we always have to assume that the list of
2146      * threads has changed.
2147      */
2148     flags |= SFrefreshThreads;
2149
2150     return flags;
2151 }
2152
2153 void GdbDriver::parseSharedLibs(const char* output, QStrList& shlibs)
2154 {
2155     if (strncmp(output, "No shared libraries loaded", 26) == 0)
2156         return;
2157
2158     // parse the table of shared libraries
2159
2160     // strip off head line
2161     output = strchr(output, '\n');
2162     if (output == 0)
2163         return;
2164     output++;                           /* skip '\n' */
2165     QString shlibName;
2166     while (*output != '\0') {
2167         // format of a line is
2168         // 0x404c5000  0x40580d90  Yes         /lib/libc.so.5
2169         // 3 blocks of non-space followed by space
2170         for (int i = 0; *output != '\0' && i < 3; i++) {
2171             while (*output != '\0' && !isspace(*output)) {      /* non-space */
2172                 output++;
2173             }
2174             while (isspace(*output)) {  /* space */
2175                 output++;
2176             }
2177         }
2178         if (*output == '\0')
2179             return;
2180         const char* start = output;
2181         output = strchr(output, '\n');
2182         if (output == 0)
2183             output = start + strlen(start);
2184         shlibName = FROM_LATIN1(start, output-start);
2185         if (*output != '\0')
2186             output++;
2187         shlibs.append(shlibName);
2188         TRACE("found shared lib " + shlibName);
2189     }
2190 }
2191
2192 bool GdbDriver::parseFindType(const char* output, QString& type)
2193 {
2194     if (strncmp(output, "type = ", 7) != 0)
2195         return false;
2196
2197     /*
2198      * Everything else is the type. We strip off any leading "const" and any
2199      * trailing "&" on the grounds that neither affects the decoding of the
2200      * object. We also strip off all white-space from the type.
2201      */
2202     output += 7;
2203     if (strncmp(output, "const ", 6) == 0)
2204         output += 6;
2205     type = output;
2206     type.replace(QRegExp("\\s+"), "");
2207     if (type.endsWith("&"))
2208         type.truncate(type.length() - 1);
2209     return true;
2210 }
2211
2212 void GdbDriver::parseRegisters(const char* output, QList<RegisterInfo>& regs)
2213 {
2214     if (strncmp(output, "The program has no registers now", 32) == 0) {
2215         return;
2216     }
2217
2218     QString regName;
2219     QString value;
2220
2221     // parse register values
2222     while (*output != '\0')
2223     {
2224         // skip space at the start of the line
2225         while (isspace(*output))
2226             output++;
2227
2228         // register name
2229         const char* start = output;
2230         while (*output != '\0' && !isspace(*output))
2231             output++;
2232         if (*output == '\0')
2233             break;
2234         regName = FROM_LATIN1(start, output-start);
2235
2236         // skip space
2237         while (isspace(*output))
2238             output++;
2239
2240         RegisterInfo* reg = new RegisterInfo;
2241         reg->regName = regName;
2242
2243         /*
2244          * If we find a brace now, this is a vector register. We look for
2245          * the closing brace and treat the result as cooked value.
2246          */
2247         if (*output == '{')
2248         {
2249             start = output;
2250             skipNested(output, '{', '}');
2251             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2252             // skip space, but not the end of line
2253             while (isspace(*output) && *output != '\n')
2254                 output++;
2255             // get rid of the braces at the begining and the end
2256             value.remove(0, 1);
2257             if (value[value.length()-1] == '}') {
2258                 value = value.left(value.length()-1);
2259             }
2260             // gdb 5.3 doesn't print a separate set of raw values
2261             if (*output == '{') {
2262                 // another set of vector follows
2263                 // what we have so far is the raw value
2264                 reg->rawValue = value;
2265
2266                 start = output;
2267                 skipNested(output, '{', '}');
2268                 value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2269             } else {
2270                 // for gdb 5.3
2271                 // find first type that does not have an array, this is the RAW value
2272                 const char* end=start;
2273                 findEnd(end);
2274                 const char* cur=start;
2275                 while (cur<end) {
2276                     while (*cur != '=' && cur<end)
2277                         cur++;
2278                     cur++;
2279                     while (isspace(*cur) && cur<end)
2280                         cur++;
2281                     if (isNumberish(*cur)) {
2282                         end=cur;
2283                         while (*end && (*end!='}') && (*end!=',') && (*end!='\n'))
2284                             end++;
2285                         QString rawValue = FROM_LATIN1(cur, end-cur).simplifyWhiteSpace();
2286                         reg->rawValue = rawValue;
2287
2288                         if (rawValue.left(2)=="0x") {
2289                             // ok we have a raw value, now get it's type
2290                             end=cur-1;
2291                             while (isspace(*end) || *end=='=') end--;
2292                             end++;
2293                             cur=end-1;
2294                             while (*cur!='{' && *cur!=' ')
2295                                 cur--;
2296                             cur++;
2297                             reg->type=FROM_LATIN1(cur, end-cur);
2298                         }
2299
2300                         // end while loop
2301                         cur=end;
2302                     }
2303                 }
2304                 // skip to the end of line
2305                 while (*output != '\0' && *output != '\n')
2306                     output++;
2307                 // get rid of the braces at the begining and the end
2308                 value.remove(0, 1);
2309                 if (value[value.length()-1] == '}') {
2310                     value = value.left(value.length()-1);
2311                 }
2312             }
2313             reg->cookedValue = value;
2314         }
2315         else
2316         {
2317             // the rest of the line is the register value
2318             start = output;
2319             output = strchr(output,'\n');
2320             if (output == 0)
2321                 output = start + strlen(start);
2322             value = FROM_LATIN1(start, output-start).simplifyWhiteSpace();
2323
2324             /*
2325              * We split the raw from the cooked values.
2326              * Some modern gdbs explicitly say: "0.1234 (raw 0x3e4567...)".
2327              * Here, the cooked value comes first, and the raw value is in
2328              * the second part.
2329              */
2330             int pos = value.find(" (raw ");
2331             if (pos >= 0)
2332             {
2333                 reg->cookedValue = value.left(pos);
2334                 reg->rawValue = value.mid(pos+6);
2335                 if (reg->rawValue.right(1) == ")")      // remove closing bracket
2336                     reg->rawValue.truncate(reg->rawValue.length()-1);
2337             }
2338             else
2339             {
2340                 /*
2341                 * In other cases we split off the first token (separated by
2342                 * whitespace). It is the raw value. The remainder of the line
2343                 * is the cooked value.
2344                 */
2345                 int pos = value.find(' ');
2346                 if (pos < 0) {
2347                     reg->rawValue = value;
2348                     reg->cookedValue = QString();
2349                 } else {
2350                     reg->rawValue = value.left(pos);
2351                     reg->cookedValue = value.mid(pos+1);
2352                 }
2353             }
2354         }
2355         if (*output != '\0')
2356             output++;                   /* skip '\n' */
2357
2358         regs.append(reg);
2359     }
2360 }
2361
2362 bool GdbDriver::parseInfoLine(const char* output, QString& addrFrom, QString& addrTo)
2363 {
2364     // "is at address" or "starts at address"
2365     const char* start = strstr(output, "s at address ");
2366     if (start == 0)
2367         return false;
2368
2369     start += 13;
2370     const char* p = start;
2371     while (*p != '\0' && !isspace(*p))
2372         p++;
2373     addrFrom = FROM_LATIN1(start, p-start);
2374
2375     start = strstr(p, "and ends at ");
2376     if (start == 0) {
2377         addrTo = addrFrom;
2378         return true;
2379     }
2380
2381     start += 12;
2382     p = start;
2383     while (*p != '\0' && !isspace(*p))
2384         p++;
2385     addrTo = FROM_LATIN1(start, p-start);
2386
2387     return true;
2388 }
2389
2390 void GdbDriver::parseDisassemble(const char* output, QList<DisassembledCode>& code)
2391 {
2392     code.clear();
2393
2394     if (strncmp(output, "Dump of assembler", 17) != 0) {
2395         // error message?
2396         DisassembledCode c;
2397         c.code = output;
2398         code.append(new DisassembledCode(c));
2399         return;
2400     }
2401
2402     // remove first line
2403     const char* p = strchr(output, '\n');
2404     if (p == 0)
2405         return;                         /* not a regular output */
2406
2407     p++;
2408
2409     // remove last line
2410     const char* end = strstr(output, "End of assembler");
2411     if (end == 0)
2412         end = p + strlen(p);
2413
2414     DbgAddr address;
2415
2416     // remove function offsets from the lines
2417     while (p != end)
2418     {
2419         const char* start = p;
2420         // address
2421         while (p != end && !isspace(*p))
2422             p++;
2423         address = FROM_LATIN1(start, p-start);
2424
2425         // function name (enclosed in '<>', followed by ':')
2426         while (p != end && *p != '<')
2427             p++;
2428         if (*p == '<')
2429             skipNestedAngles(p);
2430         if (*p == ':')
2431             p++;
2432
2433         // space until code
2434         while (p != end && isspace(*p))
2435             p++;
2436
2437         // code until end of line
2438         start = p;
2439         while (p != end && *p != '\n')
2440             p++;
2441         if (p != end)                   /* include '\n' */
2442             p++;
2443
2444         DisassembledCode* c = new DisassembledCode;
2445         c->address = address;
2446         c->code = FROM_LATIN1(start, p-start);
2447         code.append(c);
2448     }
2449 }
2450
2451 QString GdbDriver::parseMemoryDump(const char* output, QList<MemoryDump>& memdump)
2452 {
2453     if (isErrorExpr(output)) {
2454         // error; strip space
2455         QString msg = output;
2456         return msg.stripWhiteSpace();
2457     }
2458
2459     const char* p = output;             /* save typing */
2460     DbgAddr addr;
2461     QString dump;
2462
2463     // the address
2464     while (*p != 0) {
2465         const char* start = p;
2466         while (*p != '\0' && *p != ':' && !isspace(*p))
2467             p++;
2468         addr = FROM_LATIN1(start, p-start);
2469         if (*p != ':') {
2470             // parse function offset
2471             while (isspace(*p))
2472                 p++;
2473             start = p;
2474             while (*p != '\0' && !(*p == ':' && isspace(p[1])))
2475                 p++;
2476             addr.fnoffs = FROM_LATIN1(start, p-start);
2477         }
2478         if (*p == ':')
2479             p++;
2480         // skip space; this may skip a new-line char!
2481         while (isspace(*p))
2482             p++;
2483         // everything to the end of the line is the memory dump
2484         const char* end = strchr(p, '\n');
2485         if (end != 0) {
2486             dump = FROM_LATIN1(p, end-p);
2487             p = end+1;
2488         } else {
2489             dump = FROM_LATIN1(p, strlen(p));
2490             p += strlen(p);
2491         }
2492         MemoryDump* md = new MemoryDump;
2493         md->address = addr;
2494         md->dump = dump;
2495         memdump.append(md);
2496     }
2497
2498     return QString();
2499 }
2500
2501 QString GdbDriver::editableValue(VarTree* value)
2502 {
2503     const char* s = value->m_value.latin1();
2504
2505     // if the variable is a pointer value that contains a cast,
2506     // remove the cast
2507     if (*s == '(') {
2508         skipNested(s, '(', ')');
2509         // skip space
2510         while (isspace(*s))
2511             ++s;
2512     }
2513
2514 repeat:
2515     const char* start = s;
2516
2517     if (strncmp(s, "0x", 2) == 0)
2518     {
2519         s += 2;
2520         while (isxdigit(*s))
2521             ++s;
2522
2523         /*
2524          * What we saw so far might have been a reference. If so, edit the
2525          * referenced value. Otherwise, edit the pointer.
2526          */
2527         if (*s == ':') {
2528             // a reference
2529             ++s;
2530             goto repeat;
2531         }
2532         // a pointer
2533         // if it's a pointer to a string, remove the string
2534         const char* end = s;
2535         while (isspace(*s))
2536             ++s;
2537         if (*s == '"') {
2538             // a string
2539             return FROM_LATIN1(start, end-start);
2540         } else {
2541             // other pointer
2542             return FROM_LATIN1(start, strlen(start));
2543         }
2544     }
2545
2546     // else leave it unchanged (or stripped of the reference preamble)
2547     return s;
2548 }
2549
2550 QString GdbDriver::parseSetVariable(const char* output)
2551 {
2552     // if there is any output, it is an error message
2553     QString msg = output;
2554     return msg.stripWhiteSpace();
2555 }
2556
2557
2558 #include "gdbdriver.moc"