kdbg/dbgdriver.h

   1 // $Id$
   2
   3 // Copyright by Johannes Sixt
   4 // This file is under GPL, the GNU General Public Licence
   5
   6 #ifndef DBGDRIVER_H
   7 #define DBGDRIVER_H
   8
   9 #include <qptrqueue.h>
  10 #include <qptrlist.h>
  11 #include <qfile.h>
  12 #include <qregexp.h>
  13 #include <kprocess.h>
  14
  15
  16 class VarTree;
  17 class ExprWnd;
  18 class KDebugger;
  19 class QStrList;
  20 class QStringList;
  21
  22
  23 /**
  24  * A type representing an address.
  25  */
  26 struct DbgAddr
  27 {
  28     QString a;
  29     QString fnoffs;
  30     DbgAddr() { }
  31     DbgAddr(const QString& aa);
  32     DbgAddr(const DbgAddr& src) : a(src.a), fnoffs(src.fnoffs) { }
  33     void operator=(const QString& aa);
  34     void operator=(const DbgAddr& src) { a = src.a; fnoffs = src.fnoffs; }
  35     QString asString() const;
  36     bool isEmpty() const { return a.isEmpty(); }
  37 protected:
  38     void cleanAddr();
  39 };
  40 bool operator==(const DbgAddr& a1, const DbgAddr& a2);
  41 bool operator>(const DbgAddr& a1, const DbgAddr& a2);
  42
  43
  44 enum DbgCommand {
  45         DCinitialize,
  46         DCtty,
  47         DCexecutable,
  48         DCtargetremote,
  49         DCcorefile,
  50         DCattach,
  51         DCinfolinemain,
  52         DCinfolocals,
  53         DCinforegisters,
  54         DCexamine,
  55         DCinfoline,
  56         DCdisassemble,
  57         DCsetargs,
  58         DCsetenv,
  59         DCunsetenv,
  60         DCsetoption,                    /* debugger options */
  61         DCcd,
  62         DCbt,
  63         DCrun,
  64         DCcont,
  65         DCstep,
  66         DCstepi,
  67         DCnext,
  68         DCnexti,
  69         DCfinish,
  70         DCuntil,                        /* line number is zero-based! */
  71         DCkill,
  72         DCbreaktext,
  73         DCbreakline,                    /* line number is zero-based! */
  74         DCtbreakline,                   /* line number is zero-based! */
  75         DCbreakaddr,
  76         DCtbreakaddr,
  77         DCwatchpoint,
  78         DCdelete,
  79         DCenable,
  80         DCdisable,
  81         DCprint,
  82         DCprintDeref,
  83         DCprintStruct,
  84         DCprintQStringStruct,
  85         DCframe,
  86         DCfindType,
  87         DCinfosharedlib,
  88         DCthread,
  89         DCinfothreads,
  90         DCinfobreak,
  91         DCcondition,
  92         DCsetpc,
  93         DCignore,
  94         DCsetvariable
  95 };
  96
  97 enum RunDevNull {
  98     RDNstdin = 0x1,                     /* redirect stdin to /dev/null */
  99     RDNstdout = 0x2,                    /* redirect stdout to /dev/null */
 100     RDNstderr = 0x4                     /* redirect stderr to /dev/null */
 101 };
 102
 103 /**
 104  * How the memory dump is formated. The lowest 4 bits define the size of
 105  * the entities. The higher bits define how these are formatted. Note that
 106  * not all combinations make sense.
 107  */
 108 enum MemoryDumpType {
 109     // sizes
 110     MDTbyte = 0x1,
 111     MDThalfword = 0x2,
 112     MDTword = 0x3,
 113     MDTgiantword = 0x4,
 114     MDTsizemask = 0xf,
 115     // formats
 116     MDThex = 0x10,
 117     MDTsigned = 0x20,
 118     MDTunsigned = 0x30,
 119     MDToctal = 0x40,
 120     MDTbinary = 0x50,
 121     MDTaddress = 0x60,
 122     MDTchar = 0x70,
 123     MDTfloat = 0x80,
 124     MDTstring = 0x90,
 125     MDTinsn = 0xa0,
 126     MDTformatmask = 0xf0
 127 };
 128
 129 struct Breakpoint;
 130
 131 /**
 132  * Debugger commands are placed in a queue. Only one command at a time is
 133  * sent down to the debugger. All other commands in the queue are retained
 134  * until the sent command has been processed by gdb. The debugger tells us
 135  * that it's done with the command by sending the prompt. The output of the
 136  * debugger is parsed at that time. Then, if more commands are in the
 137  * queue, the next one is sent to the debugger.
 138  */
 139 struct CmdQueueItem
 140 {
 141     DbgCommand m_cmd;
 142     QString m_cmdString;
 143     bool m_committed;                   /* just a debugging aid */
 144     // remember which expression when printing an expression
 145     VarTree* m_expr;
 146     ExprWnd* m_exprWnd;
 147     // remember file position
 148     QString m_fileName;
 149     int m_lineNo;
 150     // the breakpoint info
 151     Breakpoint* m_brkpt;
 152     // whether command was emitted due to direct user request (only set when relevant)
 153     bool m_byUser;
 154
 155     CmdQueueItem(DbgCommand cmd, const QString& str) :
 156         m_cmd(cmd),
 157         m_cmdString(str),
 158         m_committed(false),
 159         m_expr(0),
 160         m_exprWnd(0),
 161         m_lineNo(0),
 162         m_brkpt(0),
 163         m_byUser(false)
 164     { }
 165 };
 166
 167 /**
 168  * The information about a breakpoint that is parsed from the list of
 169  * breakpoints.
 170  */
 171 struct Breakpoint
 172 {
 173     int id;                             /* gdb's number */
 174     enum Type {
 175         breakpoint, watchpoint
 176     } type;
 177     bool temporary;
 178     bool enabled;
 179     QString location;
 180     QString text;                       /* text if set using DCbreaktext */
 181     DbgAddr address;                    /* exact address of breakpoint */
 182     QString condition;                  /* condition as printed by gdb */
 183     int ignoreCount;                    /* ignore next that may hits */
 184     int hitCount;                       /* as reported by gdb */
 185     // the following items repeat the location, but in a better usable way
 186     QString fileName;
 187     int lineNo;                         /* zero-based line number */
 188     Breakpoint();
 189     bool isOrphaned() const { return id < 0; }
 190 };
 191
 192 /**
 193  * Information about a stack frame.
 194  */
 195 struct FrameInfo
 196 {
 197     QString fileName;
 198     int lineNo;                         /* zero-based line number */
 199     DbgAddr address;                    /* exact address of PC */
 200 };
 201
 202 /**
 203  * The information about a stack frame as parsed from the backtrace.
 204  */
 205 struct StackFrame : FrameInfo
 206 {
 207     int frameNo;
 208     VarTree* var;                       /* more information if non-zero */
 209     StackFrame() : var(0) { }
 210     ~StackFrame();
 211 };
 212
 213 /**
 214  * The information about a thread as parsed from the threads list.
 215  */
 216 struct ThreadInfo : FrameInfo
 217 {
 218     int id;                             /* gdb's number */
 219     QString threadName;                 /* the SYSTAG */
 220     QString function;                   /* where thread is halted */
 221     bool hasFocus;                      /* the thread whose stack we are watching */
 222 };
 223
 224 /**
 225  * Register information
 226  */
 227 struct RegisterInfo
 228 {
 229     QString regName;
 230     QString rawValue;
 231     QString cookedValue;                /* may be empty */
 232     QString type;                       /* of vector register if not empty */
 233 };
 234
 235 /**
 236  * Disassembled code
 237  */
 238 struct DisassembledCode
 239 {
 240     DbgAddr address;
 241     QString code;
 242 };
 243
 244 /**
 245  * Memory contents
 246  */
 247 struct MemoryDump
 248 {
 249     DbgAddr address;
 250     QString dump;
 251 };
 252
 253 /**
 254  * This is an abstract base class for debugger process.
 255  *
 256  * This class represents the debugger program. It provides the low-level
 257  * interface to the commandline debugger. As such it implements the
 258  * commands and parses the output.
 259  */
 260 class DebuggerDriver : public KProcess
 261 {
 262     Q_OBJECT
 263 public:
 264     DebuggerDriver();
 265     virtual ~DebuggerDriver() = 0;
 266
 267     virtual QString driverName() const = 0;
 268     /**
 269      * Returns the default command string to invoke the debugger driver.
 270      */
 271     virtual QString defaultInvocation() const = 0;
 272
 273     /**
 274      * Returns a list of options that can be  turned on and off.
 275      */
 276     virtual QStringList boolOptionList() const = 0;
 277
 278     virtual bool startup(QString cmdStr);
 279     void dequeueCmdByVar(VarTree* var);
 280     void setLogFileName(const QString& fname) { m_logFileName = fname; }
 281
 282 protected:
 283     QString m_runCmd;
 284
 285     enum DebuggerState {
 286         DSidle,                         /* gdb waits for input */
 287         DSinterrupted,                  /* a command was interrupted */
 288         DSrunningLow,                   /* gdb is running a low-priority command */
 289         DSrunning,                      /* gdb waits for program */
 290         DScommandSent,                  /* command has been sent, we wait for wroteStdin signal */
 291         DScommandSentLow                /* low-prioritycommand has been sent */
 292     };
 293     DebuggerState m_state;
 294
 295 public:
 296     bool isIdle() const { return m_state == DSidle; }
 297     /**
 298      * Tells whether a high prority command would be executed immediately.
 299      */
 300     bool canExecuteImmediately() const { return m_hipriCmdQueue.isEmpty(); }
 301
 302 protected:
 303     char* m_output;                     /* normal gdb output */
 304     size_t m_outputLen;                 /* amount of data so far accumulated in m_output */
 305     size_t m_outputAlloc;               /* space available in m_output */
 306     typedef QCString DelayedStr;
 307     QQueue<DelayedStr> m_delayedOutput; /* output colleced while we have receivedOutput */
 308                                         /* but before signal wroteStdin arrived */
 309
 310 public:
 311     /**
 312      * Enqueues a high-priority command. High-priority commands are
 313      * executed before any low-priority commands. No user interaction is
 314      * possible as long as there is a high-priority command in the queue.
 315      */
 316     virtual CmdQueueItem* executeCmd(DbgCommand,
 317                                      bool clearLow = false) = 0;
 318     virtual CmdQueueItem* executeCmd(DbgCommand, QString strArg,
 319                                      bool clearLow = false) = 0;
 320     virtual CmdQueueItem* executeCmd(DbgCommand, int intArg,
 321                                      bool clearLow = false) = 0;
 322     virtual CmdQueueItem* executeCmd(DbgCommand, QString strArg, int intArg,
 323                                      bool clearLow = false) = 0;
 324     virtual CmdQueueItem* executeCmd(DbgCommand, QString strArg1, QString strArg2,
 325                                      bool clearLow = false) = 0;
 326     virtual CmdQueueItem* executeCmd(DbgCommand, int intArg1, int intArg2,
 327                                      bool clearLow = false) = 0;
 328
 329     enum QueueMode {
 330         QMnormal,                       /* queues the command last */
 331         QMoverride,                     /* removes an already queued command */
 332         QMoverrideMoreEqual             /* ditto, also puts the command first in the queue */
 333     };
 334
 335     /**
 336      * Enqueues a low-priority command. Low-priority commands are executed
 337      * after any high-priority commands.
 338      */
 339     virtual CmdQueueItem* queueCmd(DbgCommand,
 340                                    QueueMode mode) = 0;
 341     virtual CmdQueueItem* queueCmd(DbgCommand, QString strArg,
 342                                    QueueMode mode) = 0;
 343     virtual CmdQueueItem* queueCmd(DbgCommand, int intArg,
 344                                    QueueMode mode) = 0;
 345     virtual CmdQueueItem* queueCmd(DbgCommand, QString strArg, int intArg,
 346                                    QueueMode mode) = 0;
 347     virtual CmdQueueItem* queueCmd(DbgCommand, QString strArg1, QString strArg2,
 348                                    QueueMode mode) = 0;
 349
 350     /**
 351      * Flushes the command queues.
 352      * @param hipriOnly if true, only the high priority queue is flushed.
 353      */
 354     virtual void flushCommands(bool hipriOnly = false);
 355
 356     /**
 357      * Terminates the debugger process.
 358      */
 359     virtual void terminate() = 0;
 360
 361     /**
 362      * Terminates the debugger process, but also detaches any program that
 363      * it has been attached to.
 364      */
 365     virtual void detachAndTerminate() = 0;
 366
 367     /**
 368      * Interrupts the debuggee.
 369      */
 370     virtual void interruptInferior() = 0;
 371
 372     /**
 373      * Parses the output as an array of QChars.
 374      */
 375     virtual VarTree* parseQCharArray(const char* output, bool wantErrorValue, bool qt3like) = 0;
 376
 377     /**
 378      * Parses a back-trace (the output of the DCbt command).
 379      */
 380     virtual void parseBackTrace(const char* output, QList<StackFrame>& stack) = 0;
 381
 382     /**
 383      * Parses the output of the DCframe command;
 384      * @param frameNo Returns the frame number.
 385      * @param file Returns the source file name.
 386      * @param lineNo The zero-based line number.
 387      * @param address Returns the exact address.
 388      * @return false if the frame could not be parsed successfully. The
 389      * output values are undefined in this case.
 390      */
 391     virtual bool parseFrameChange(const char* output, int& frameNo,
 392                                   QString& file, int& lineNo, DbgAddr& address) = 0;
 393
 394     /**
 395      * Parses a list of breakpoints.
 396      * @param output The output of the debugger.
 397      * @param brks The list of new #Breakpoint objects. The list
 398      * must initially be empty.
 399      * @return False if there was an error before the first breakpoint
 400      * was found. Even if true is returned, #brks may be empty.
 401      */
 402     virtual bool parseBreakList(const char* output, QList<Breakpoint>& brks) = 0;
 403
 404     /**
 405      * Parses a list of threads.
 406      * @param output The output of the debugger.
 407      * @param threads The list of new #ThreadInfo objects. The list
 408      * must initially be empty.
 409      * @return False if there was an error before the first thread entry
 410      * was found. Even if true is returned, #threads may be empty.
 411      */
 412     virtual bool parseThreadList(const char* output, QList<ThreadInfo>& threads) = 0;
 413
 414     /**
 415      * Parses the output when the program stops to see whether this it
 416      * stopped due to a breakpoint.
 417      * @param output The output of the debugger.
 418      * @param id Returns the breakpoint id.
 419      * @param file Returns the file name in which the breakpoint is.
 420      * @param lineNo Returns the zero-based line number of the breakpoint.
 421      * @param address Returns the address of the breakpoint.
 422      * @return False if there was no breakpoint.
 423      */
 424     virtual bool parseBreakpoint(const char* output, int& id,
 425                                  QString& file, int& lineNo, QString& address) = 0;
 426
 427     /**
 428      * Parses the output of the DCinfolocals command.
 429      * @param output The output of the debugger.
 430      * @param newVars Receives the parsed variable values. The values are
 431      * simply append()ed to the supplied list.
 432      */
 433     virtual void parseLocals(const char* output, QList<VarTree>& newVars) = 0;
 434
 435     /**
 436      * Parses the output of a DCprint or DCprintStruct command.
 437      * @param output The output of the debugger.
 438      * @param wantErrorValue Specifies whether the error message should be
 439      * provided as the value of a NKplain variable. If this is false,
 440      * #var will be 0 if the printed value is an error message.
 441      * @param var Returns the variable value. It is set to 0 if there was
 442      * a parse error or if the output is an error message and wantErrorValue
 443      * is false. If it is not 0, #var->text() will return junk and must be
 444      * set using #var->setText().
 445      * @return false if the output is an error message. Even if true is
 446      * returned, #var might still be 0 (due to a parse error).
 447      */
 448     virtual bool parsePrintExpr(const char* output, bool wantErrorValue,
 449                                 VarTree*& var) = 0;
 450
 451     /**
 452      * Parses the output of the DCcd command.
 453      * @return false if the message is an error message.
 454      */
 455     virtual bool parseChangeWD(const char* output, QString& message) = 0;
 456
 457     /**
 458      * Parses the output of the DCexecutable command.
 459      * @return false if an error occured.
 460      */
 461     virtual bool parseChangeExecutable(const char* output, QString& message) = 0;
 462
 463     /**
 464      * Parses the output of the DCcorefile command.
 465      * @return false if the core file was not loaded successfully.
 466      */
 467     virtual bool parseCoreFile(const char* output) = 0;
 468
 469     enum StopFlags {
 470         SFrefreshSource = 1,            /* refresh of source code is needed */
 471         SFrefreshBreak = 2,             /* refresh breakpoints */
 472         SFrefreshThreads = 4,           /* refresh thread list */
 473         SFprogramActive = 128           /* program remains active */
 474     };
 475     /**
 476      * Parses the output of commands that execute (a piece of) the program.
 477      * @return The inclusive OR of zero or more of the StopFlags.
 478      */
 479     virtual uint parseProgramStopped(const char* output, QString& message) = 0;
 480
 481     /**
 482      * Parses the output of the DCsharedlibs command.
 483      */
 484     virtual void parseSharedLibs(const char* output, QStrList& shlibs) = 0;
 485
 486     /**
 487      * Parses the output of the DCfindType command.
 488      * @return true if a type was found.
 489      */
 490     virtual bool parseFindType(const char* output, QString& type) = 0;
 491
 492     /**
 493      * Parses the output of the DCinforegisters command.
 494      */
 495     virtual void parseRegisters(const char* output, QList<RegisterInfo>& regs) = 0;
 496
 497     /**
 498      * Parses the output of the DCinfoline command. Returns false if the
 499      * two addresses could not be found.
 500      */
 501     virtual bool parseInfoLine(const char* output,
 502                                QString& addrFrom, QString& addrTo) = 0;
 503
 504     /**
 505      * Parses the ouput of the DCdisassemble command.
 506      */
 507     virtual void parseDisassemble(const char* output, QList<DisassembledCode>& code) = 0;
 508
 509     /**
 510      * Parses a memory dump. Returns an empty string if no error was found;
 511      * otherwise it contains an error message.
 512      */
 513     virtual QString parseMemoryDump(const char* output, QList<MemoryDump>& memdump) = 0;
 514
 515     /**
 516      * Parses the output of the DCsetvariable command. Returns an empty
 517      * string if no error was found; otherwise it contains an error
 518      * message.
 519      */
 520     virtual QString parseSetVariable(const char* output) = 0;
 521
 522     /**
 523      * Returns a value that the user can edit.
 524      */
 525     virtual QString editableValue(VarTree* value);
 526
 527 protected:
 528     /** Removes all commands from the low-priority queue. */
 529     void flushLoPriQueue();
 530     /** Removes all commands from  the high-priority queue. */
 531     void flushHiPriQueue();
 532
 533     QQueue<CmdQueueItem> m_hipriCmdQueue;
 534     QList<CmdQueueItem> m_lopriCmdQueue;
 535     /**
 536      * The active command is kept separately from other pending commands.
 537      */
 538     CmdQueueItem* m_activeCmd;
 539     /**
 540      * Helper function that queues the given command string in the
 541      * low-priority queue.
 542      */
 543     CmdQueueItem* queueCmdString(DbgCommand cmd, QString cmdString,
 544                                  QueueMode mode);
 545     /**
 546      * Helper function that queues the given command string in the
 547      * high-priority queue.
 548      */
 549     CmdQueueItem* executeCmdString(DbgCommand cmd, QString cmdString,
 550                                    bool clearLow);
 551     void writeCommand();
 552     virtual void commandFinished(CmdQueueItem* cmd) = 0;
 553
 554 protected:
 555     /** @internal */
 556     virtual int commSetupDoneC();
 557
 558     char m_prompt[10];
 559     size_t m_promptMinLen;
 560     char m_promptLastChar;
 561     QRegExp m_promptRE;
 562
 563     // log file
 564     QString m_logFileName;
 565     QFile m_logFile;
 566
 567 protected slots:
 568     virtual void slotReceiveOutput(KProcess*, char* buffer, int buflen);
 569     virtual void slotCommandRead(KProcess*);
 570     virtual void slotExited(KProcess*);
 571
 572 signals:
 573     /**
 574      * This signal is emitted when the output of a command has been fully
 575      * collected and is ready to be interpreted.
 576      */
 577     void commandReceived(CmdQueueItem* cmd, const char* output);
 578
 579     /**
 580      * This signal is emitted when the debugger recognizes that a specific
 581      * location in a file ought to be displayed.
 582      *
 583      * Gdb's --fullname option supports this for the step, next, frame, and
 584      * run commands (and possibly others).
 585      *
 586      * @param file specifies the file; this is not necessarily a full path
 587      * name, and if it is relative, you won't know relative to what, you
 588      * can only guess.
 589      * @param lineNo specifies the line number (0-based!) (this may be
 590      * negative, in which case the file should be activated, but the line
 591      * should NOT be changed).
 592      * @param address specifies the exact address of the PC or is empty.
 593      */
 594     void activateFileLine(const QString& file, int lineNo, const DbgAddr& address);
 595
 596     /**
 597      * This signal is emitted when a command that starts the inferior has
 598      * been submitted to the debugger.
 599      */
 600     void inferiorRunning();
 601
 602     /**
 603      * This signal is emitted when all output from the debugger has been
 604      * consumed and no more commands are in the queues.
 605      */
 606     void enterIdleState();
 607 };
 608
 609 #endif // DBGDRIVER_H