VirtualBox

source: vbox/trunk/include/VBox/dbg.h@ 3810

Last change on this file since 3810 was 3633, checked in by vboxsync, 17 years ago

VBox_hdr_h -> _VBox_hdr_h

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1/** @file
2 * Debugger Interfaces.
3 *
4 * This header covers all external interfaces of the Debugger module.
5 * However, it does not cover the DBGF interface since that part of the
6 * VMM. Use dbgf.h for that.
7 */
8
9/*
10 * Copyright (C) 2006-2007 innotek GmbH
11 *
12 * This file is part of VirtualBox Open Source Edition (OSE), as
13 * available from http://www.virtualbox.org. This file is free software;
14 * you can redistribute it and/or modify it under the terms of the GNU
15 * General Public License as published by the Free Software Foundation,
16 * in version 2 as it comes in the "COPYING" file of the VirtualBox OSE
17 * distribution. VirtualBox OSE is distributed in the hope that it will
18 * be useful, but WITHOUT ANY WARRANTY of any kind.
19 *
20 * If you received this file as part of a commercial VirtualBox
21 * distribution, then only the terms of your commercial VirtualBox
22 * license agreement apply instead of the previous paragraph.
23 */
24
25#ifndef ___VBox_dbg_h
26#define ___VBox_dbg_h
27
28#include <VBox/cdefs.h>
29#include <VBox/types.h>
30#include <VBox/dbgf.h>
31
32#include <iprt/stdarg.h>
33
34__BEGIN_DECLS
35
36/** @def VBOX_WITH_DEBUGGER
37 * The build is with debugger module. Test if this is defined before
38 * registering external debugger commands.
39 */
40#ifndef VBOX_WITH_DEBUGGER
41# ifdef DEBUG
42# define VBOX_WITH_DEBUGGER
43# endif
44#endif
45
46
47/**
48 * DBGC variable category.
49 *
50 * Used to describe an argument to a command or function and a functions
51 * return value.
52 */
53typedef enum DBGCVARCAT
54{
55 /** Any type is fine. */
56 DBGCVAR_CAT_ANY = 0,
57 /** Any kind of pointer. */
58 DBGCVAR_CAT_POINTER,
59 /** Any kind of pointer with no range option. */
60 DBGCVAR_CAT_POINTER_NO_RANGE,
61 /** GC pointer. */
62 DBGCVAR_CAT_GC_POINTER,
63 /** GC pointer with no range option. */
64 DBGCVAR_CAT_GC_POINTER_NO_RANGE,
65 /** Numeric argument. */
66 DBGCVAR_CAT_NUMBER,
67 /** Numeric argument with no range option. */
68 DBGCVAR_CAT_NUMBER_NO_RANGE,
69 /** String. */
70 DBGCVAR_CAT_STRING,
71 /** Symbol. */
72 DBGCVAR_CAT_SYMBOL
73} DBGCVARCAT;
74
75
76/**
77 * DBGC variable type.
78 */
79typedef enum DBGCVARTYPE
80{
81 /** unknown... */
82 DBGCVAR_TYPE_UNKNOWN = 0,
83 /** Flat GC pointer. */
84 DBGCVAR_TYPE_GC_FLAT,
85 /** Segmented GC pointer. */
86 DBGCVAR_TYPE_GC_FAR,
87 /** Physical GC pointer. */
88 DBGCVAR_TYPE_GC_PHYS,
89 /** Flat HC pointer. */
90 DBGCVAR_TYPE_HC_FLAT,
91 /** Segmented HC pointer. */
92 DBGCVAR_TYPE_HC_FAR,
93 /** Physical HC pointer. */
94 DBGCVAR_TYPE_HC_PHYS,
95 /** String. */
96 DBGCVAR_TYPE_STRING,
97 /** Number. */
98 DBGCVAR_TYPE_NUMBER,
99 /** Symbol. */
100 DBGCVAR_TYPE_SYMBOL,
101 /** Special type used when querying symbols. */
102 DBGCVAR_TYPE_ANY
103} DBGCVARTYPE;
104
105/** Checks if the specified variable type is of a pointer persuasion. */
106#define DBGCVAR_ISPOINTER(enmType) (enmType >= DBGCVAR_TYPE_GC_FLAT && enmType <= DBGCVAR_TYPE_HC_PHYS)
107/** Checks if the specified variable type is of a pointer persuasion and of the guest context sort. */
108#define DBGCVAR_ISGCPOINTER(enmType) (enmType >= DBGCVAR_TYPE_GC_FLAT && enmType <= DBGCVAR_TYPE_GC_PHYS)
109/** Checks if the specified variable type is of a pointer persuasion and of the host context sort. */
110#define DBGCVAR_ISHCPOINTER(enmType) (enmType >= DBGCVAR_TYPE_HC_FLAT && enmType <= DBGCVAR_TYPE_HC_PHYS)
111
112
113/**
114 * DBGC variable range type.
115 */
116typedef enum DBGCVARRANGETYPE
117{
118 /** No range appliable or no range specified. */
119 DBGCVAR_RANGE_NONE = 0,
120 /** Number of elements. */
121 DBGCVAR_RANGE_ELEMENTS,
122 /** Number of bytes. */
123 DBGCVAR_RANGE_BYTES
124} DBGCVARRANGETYPE;
125
126
127/**
128 * Variable descriptor.
129 */
130typedef struct DBGCVARDESC
131{
132 /** The minimal number of times this argument may occur.
133 * Use 0 here to inidicate that the argument is optional. */
134 unsigned cTimesMin;
135 /** Maximum number of occurences.
136 * Use ~0 here to indicate infinite. */
137 unsigned cTimesMax;
138 /** Argument category. */
139 DBGCVARCAT enmCategory;
140 /** Flags, DBGCVD_FLAGS_* */
141 unsigned fFlags;
142 /** Argument name. */
143 const char *pszName;
144 /** Argument name. */
145 const char *pszDescription;
146} DBGCVARDESC;
147/** Pointer to an argument descriptor. */
148typedef DBGCVARDESC *PDBGCVARDESC;
149/** Pointer to a const argument descriptor. */
150typedef const DBGCVARDESC *PCDBGCVARDESC;
151
152/** Variable descriptor flags.
153 * @{ */
154/** Indicates that the variable depends on the previous being present. */
155#define DBGCVD_FLAGS_DEP_PREV BIT(1)
156/** @} */
157
158
159/**
160 * DBGC variable.
161 */
162typedef struct DBGCVAR
163{
164 /** Pointer to the argument descriptor. */
165 PCDBGCVARDESC pDesc;
166 /** Pointer to the next argument. */
167 struct DBGCVAR *pNext;
168
169 /** Argument type. */
170 DBGCVARTYPE enmType;
171 /** Type specific. */
172 union
173 {
174 /** Flat GC Address. (DBGCVAR_TYPE_GC_FLAT) */
175 RTGCPTR GCFlat;
176 /** Far (16:32) GC Address. (DBGCVAR_TYPE_GC_FAR) */
177 RTFAR32 GCFar;
178 /** Physical GC Address. (DBGCVAR_TYPE_GC_PHYS) */
179 RTGCPHYS GCPhys;
180 /** Flat HC Address. (DBGCVAR_TYPE_HC_FLAT) */
181 void *pvHCFlat;
182 /** Far (16:32) HC Address. (DBGCVAR_TYPE_HC_FAR) */
183 RTFAR32 HCFar;
184 /** Physical GC Address. (DBGCVAR_TYPE_HC_PHYS) */
185 RTHCPHYS HCPhys;
186 /** String. (DBGCVAR_TYPE_STRING)
187 * The basic idea is the the this is a pointer to the expression we're
188 * parsing, so no messing with freeing. */
189 const char *pszString;
190 /** Number. (DBGCVAR_TYPE_NUMBER) */
191 uint64_t u64Number;
192 } u;
193
194 /** Range type. */
195 DBGCVARRANGETYPE enmRangeType;
196 /** Range. The use of the content depends on the enmRangeType. */
197 uint64_t u64Range;
198} DBGCVAR;
199/** Pointer to a command argument. */
200typedef DBGCVAR *PDBGCVAR;
201/** Pointer to a const command argument. */
202typedef const DBGCVAR *PCDBGCVAR;
203
204
205/** Pointer to helper functions for commands. */
206typedef struct DBGCCMDHLP *PDBGCCMDHLP;
207
208/**
209 * Command helper for writing text to the debug console.
210 *
211 * @returns VBox status.
212 * @param pCmdHlp Pointer to the command callback structure.
213 * @param pvBuf What to write.
214 * @param cbBuf Number of bytes to write.
215 * @param pcbWritten Where to store the number of bytes actually written.
216 * If NULL the entire buffer must be successfully written.
217 */
218typedef DECLCALLBACK(int) FNDBGCHLPWRITE(PDBGCCMDHLP pCmdHlp, const void *pvBuf, size_t cbBuf, size_t *pcbWritten);
219/** Pointer to a FNDBGCHLPWRITE() function. */
220typedef FNDBGCHLPWRITE *PFNDBGCHLPWRITE;
221
222/**
223 * Command helper for writing formatted text to the debug console.
224 *
225 * @returns VBox status.
226 * @param pCmdHlp Pointer to the command callback structure.
227 * @param pcb Where to store the number of bytes written.
228 * @param pszFormat The format string.
229 * This is using the log formatter, so it's format extensions can be used.
230 * @param ... Arguments specified in the format string.
231 */
232typedef DECLCALLBACK(int) FNDBGCHLPPRINTF(PDBGCCMDHLP pCmdHlp, size_t *pcbWritten, const char *pszFormat, ...);
233/** Pointer to a FNDBGCHLPPRINTF() function. */
234typedef FNDBGCHLPPRINTF *PFNDBGCHLPPRINTF;
235
236/**
237 * Command helper for writing formatted text to the debug console.
238 *
239 * @returns VBox status.
240 * @param pCmdHlp Pointer to the command callback structure.
241 * @param pcb Where to store the number of bytes written.
242 * @param pszFormat The format string.
243 * This is using the log formatter, so it's format extensions can be used.
244 * @param args Arguments specified in the format string.
245 */
246typedef DECLCALLBACK(int) FNDBGCHLPPRINTFV(PDBGCCMDHLP pCmdHlp, size_t *pcbWritten, const char *pszFormat, va_list args);
247/** Pointer to a FNDBGCHLPPRINTFV() function. */
248typedef FNDBGCHLPPRINTFV *PFNDBGCHLPPRINTFV;
249
250/**
251 * Command helper for formatting and error message for a VBox status code.
252 *
253 * @returns VBox status code appropriate to return from a command.
254 * @param pCmdHlp Pointer to the command callback structure.
255 * @param rc The VBox status code.
256 * @param pcb Where to store the number of bytes written.
257 * @param pszFormat Format string for additional messages. Can be NULL.
258 * @param ... Format arguments, optional.
259 */
260typedef DECLCALLBACK(int) FNDBGCHLPVBOXERROR(PDBGCCMDHLP pCmdHlp, int rc, const char *pszFormat, ...);
261/** Pointer to a FNDBGCHLPVBOXERROR() function. */
262typedef FNDBGCHLPVBOXERROR *PFNDBGCHLPVBOXERROR;
263
264/**
265 * Command helper for formatting and error message for a VBox status code.
266 *
267 * @returns VBox status code appropriate to return from a command.
268 * @param pCmdHlp Pointer to the command callback structure.
269 * @param rc The VBox status code.
270 * @param pcb Where to store the number of bytes written.
271 * @param pszFormat Format string for additional messages. Can be NULL.
272 * @param args Format arguments, optional.
273 */
274typedef DECLCALLBACK(int) FNDBGCHLPVBOXERRORV(PDBGCCMDHLP pCmdHlp, int rc, const char *pszFormat, va_list args);
275/** Pointer to a FNDBGCHLPVBOXERRORV() function. */
276typedef FNDBGCHLPVBOXERRORV *PFNDBGCHLPVBOXERRORV;
277
278/**
279 * Command helper for reading memory specified by a DBGC variable.
280 *
281 * @returns VBox status code appropriate to return from a command.
282 * @param pCmdHlp Pointer to the command callback structure.
283 * @param pVM VM handle if GC or physical HC address.
284 * @param pvBuffer Where to store the read data.
285 * @param cbRead Number of bytes to read.
286 * @param pVarPointer DBGC variable specifying where to start reading.
287 * @param pcbRead Where to store the number of bytes actually read.
288 * This optional, but it's useful when read GC virtual memory where a
289 * page in the requested range might not be present.
290 * If not specified not-present failure or end of a HC physical page
291 * will cause failure.
292 */
293typedef DECLCALLBACK(int) FNDBGCHLPMEMREAD(PDBGCCMDHLP pCmdHlp, PVM pVM, void *pvBuffer, size_t cbRead, PCDBGCVAR pVarPointer, size_t *pcbRead);
294/** Pointer to a FNDBGCHLPMEMREAD() function. */
295typedef FNDBGCHLPMEMREAD *PFNDBGCHLPMEMREAD;
296
297/**
298 * Command helper for writing memory specified by a DBGC variable.
299 *
300 * @returns VBox status code appropriate to return from a command.
301 * @param pCmdHlp Pointer to the command callback structure.
302 * @param pVM VM handle if GC or physical HC address.
303 * @param pvBuffer What to write.
304 * @param cbWrite Number of bytes to write.
305 * @param pVarPointer DBGC variable specifying where to start reading.
306 * @param pcbWritten Where to store the number of bytes written.
307 * This is optional. If NULL be aware that some of the buffer
308 * might have been written to the specified address.
309 */
310typedef DECLCALLBACK(int) FNDBGCHLPMEMWRITE(PDBGCCMDHLP pCmdHlp, PVM pVM, const void *pvBuffer, size_t cbWrite, PCDBGCVAR pVarPointer, size_t *pcbWritten);
311/** Pointer to a FNDBGCHLPMEMWRITE() function. */
312typedef FNDBGCHLPMEMWRITE *PFNDBGCHLPMEMWRITE;
313
314
315/**
316 * Evaluates an expression.
317 * (Hopefully the parser and functions are fully reentrant.)
318 *
319 * @returns VBox status code appropriate to return from a command.
320 * @param pCmdHlp Pointer to the command callback structure.
321 * @param pResult Where to store the result.
322 * @param pszExpr The expression. Format string with the format DBGC extensions.
323 * @param ... Format arguments.
324 */
325typedef DECLCALLBACK(int) FNDBGCHLPEVAL(PDBGCCMDHLP pCmdHlp, PDBGCVAR pResult, const char *pszExpr, ...);
326/** Pointer to a FNDBGCHLPEVAL() function. */
327typedef FNDBGCHLPEVAL *PFNDBGCHLPEVAL;
328
329
330/**
331 * Executes command an expression.
332 * (Hopefully the parser and functions are fully reentrant.)
333 *
334 * @returns VBox status code appropriate to return from a command.
335 * @param pCmdHlp Pointer to the command callback structure.
336 * @param pszExpr The expression. Format string with the format DBGC extensions.
337 * @param ... Format arguments.
338 */
339typedef DECLCALLBACK(int) FNDBGCHLPEXEC(PDBGCCMDHLP pCmdHlp, const char *pszExpr, ...);
340/** Pointer to a FNDBGCHLPEVAL() function. */
341typedef FNDBGCHLPEXEC *PFNDBGCHLPEXEC;
342
343
344/**
345 * Helper functions for commands.
346 */
347typedef struct DBGCCMDHLP
348{
349 /** Pointer to a FNDBCHLPWRITE() function. */
350 PFNDBGCHLPWRITE pfnWrite;
351 /** Pointer to a FNDBGCHLPPRINTF() function. */
352 PFNDBGCHLPPRINTF pfnPrintf;
353 /** Pointer to a FNDBGCHLPPRINTFV() function. */
354 PFNDBGCHLPPRINTFV pfnPrintfV;
355 /** Pointer to a FNDBGCHLPVBOXERROR() function. */
356 PFNDBGCHLPVBOXERROR pfnVBoxError;
357 /** Pointer to a FNDBGCHLPVBOXERRORV() function. */
358 PFNDBGCHLPVBOXERRORV pfnVBoxErrorV;
359 /** Pointer to a FNDBGCHLPMEMREAD() function. */
360 PFNDBGCHLPMEMREAD pfnMemRead;
361 /** Pointer to a FNDBGCHLPMEMWRITE() function. */
362 PFNDBGCHLPMEMWRITE pfnMemWrite;
363 /** Pointer to a FNDBGCHLPEVAL() function. */
364 PFNDBGCHLPEVAL pfnEval;
365 /** Pointer to a FNDBGCHLPEXEC() function. */
366 PFNDBGCHLPEXEC pfnExec;
367
368 /**
369 * Converts a DBGC variable to a DBGF address structure.
370 *
371 * @returns VBox status code.
372 * @param pCmdHlp Pointer to the command callback structure.
373 * @param pVar The variable to convert.
374 * @param pAddress The target address.
375 */
376 DECLCALLBACKMEMBER(int, pfnVarToDbgfAddr)(PDBGCCMDHLP pCmdHlp, PCDBGCVAR pVar, PDBGFADDRESS pAddress);
377
378 /**
379 * Converts a DBGC variable to a boolean.
380 *
381 * @returns VBox status code.
382 * @param pCmdHlp Pointer to the command callback structure.
383 * @param pVar The variable to convert.
384 * @param pf Where to store the boolean.
385 */
386 DECLCALLBACKMEMBER(int, pfnVarToBool)(PDBGCCMDHLP pCmdHlp, PCDBGCVAR pVar, bool *pf);
387
388} DBGCCMDHLP;
389
390
391
392/** Pointer to command descriptor. */
393typedef struct DBGCCMD *PDBGCCMD;
394/** Pointer to const command descriptor. */
395typedef const struct DBGCCMD *PCDBGCCMD;
396
397/**
398 * Command handler.
399 *
400 * The console will call the handler for a command once it's finished
401 * parsing the user input. The command handler function is responsible
402 * for executing the command itself.
403 *
404 * @returns VBox status.
405 * @param pCmd Pointer to the command descriptor (as registered).
406 * @param pCmdHlp Pointer to command helper functions.
407 * @param pVM Pointer to the current VM (if any).
408 * @param paArgs Pointer to (readonly) array of arguments.
409 * @param cArgs Number of arguments in the array.
410 * @param pResult Where to store the result. NULL if no result descriptor was specified.
411 */
412typedef DECLCALLBACK(int) FNDBGCCMD(PCDBGCCMD pCmd, PDBGCCMDHLP pCmdHlp, PVM pVM, PCDBGCVAR pArgs, unsigned cArgs, PDBGCVAR pResult);
413/** Pointer to a FNDBGCCMD() function. */
414typedef FNDBGCCMD *PFNDBGCCMD;
415
416/**
417 * DBGC command descriptor.
418 *
419 * If a pResultDesc is specified the command can be called and used
420 * as a function too. If it's a pure function, set fFlags to
421 * DBGCCMD_FLAGS_FUNCTION.
422 */
423typedef struct DBGCCMD
424{
425 /** Command string. */
426 const char *pszCmd;
427 /** Minimum number of arguments. */
428 unsigned cArgsMin;
429 /** Max number of arguments. */
430 unsigned cArgsMax;
431 /** Argument descriptors (array). */
432 PCDBGCVARDESC paArgDescs;
433 /** Number of argument descriptors. */
434 unsigned cArgDescs;
435 /** Result descriptor. */
436 PCDBGCVARDESC pResultDesc;
437 /** flags. (reserved for now) */
438 unsigned fFlags;
439 /** Handler function. */
440 PFNDBGCCMD pfnHandler;
441 /** Command syntax. */
442 const char *pszSyntax;
443 /** Command description. */
444 const char *pszDescription;
445} DBGCCMD;
446
447/** DBGCCMD Flags.
448 * @{
449 */
450/** The description is of a pure function which cannot be invoked
451 * as a command from the commandline. */
452#define DBGCCMD_FLAGS_FUNCTION 1
453/** @} */
454
455
456
457/** Pointer to a DBGC backend. */
458typedef struct DBGCBACK *PDBGCBACK;
459
460/**
461 * Checks if there is input.
462 *
463 * @returns true if there is input ready.
464 * @returns false if there not input ready.
465 * @param pBack Pointer to the backend structure supplied by
466 * the backend. The backend can use this to find
467 * it's instance data.
468 * @param cMillies Number of milliseconds to wait on input data.
469 */
470typedef DECLCALLBACK(bool) FNDBGCBACKINPUT(PDBGCBACK pBack, uint32_t cMillies);
471/** Pointer to a FNDBGCBACKINPUT() callback. */
472typedef FNDBGCBACKINPUT *PFNDBGCBACKINPUT;
473
474/**
475 * Read input.
476 *
477 * @returns VBox status code.
478 * @param pBack Pointer to the backend structure supplied by
479 * the backend. The backend can use this to find
480 * it's instance data.
481 * @param pvBuf Where to put the bytes we read.
482 * @param cbBuf Maximum nymber of bytes to read.
483 * @param pcbRead Where to store the number of bytes actually read.
484 * If NULL the entire buffer must be filled for a
485 * successful return.
486 */
487typedef DECLCALLBACK(int) FNDBGCBACKREAD(PDBGCBACK pBack, void *pvBuf, size_t cbBuf, size_t *pcbRead);
488/** Pointer to a FNDBGCBACKREAD() callback. */
489typedef FNDBGCBACKREAD *PFNDBGCBACKREAD;
490
491/**
492 * Write (output).
493 *
494 * @returns VBox status code.
495 * @param pBack Pointer to the backend structure supplied by
496 * the backend. The backend can use this to find
497 * it's instance data.
498 * @param pvBuf What to write.
499 * @param cbBuf Number of bytes to write.
500 * @param pcbWritten Where to store the number of bytes actually written.
501 * If NULL the entire buffer must be successfully written.
502 */
503typedef DECLCALLBACK(int) FNDBGCBACKWRITE(PDBGCBACK pBack, const void *pvBuf, size_t cbBuf, size_t *pcbWritten);
504/** Pointer to a FNDBGCBACKWRITE() callback. */
505typedef FNDBGCBACKWRITE *PFNDBGCBACKWRITE;
506
507
508/**
509 * The communication backend provides the console with a number of callbacks
510 * which can be used
511 */
512typedef struct DBGCBACK
513{
514 /** Check for input. */
515 PFNDBGCBACKINPUT pfnInput;
516 /** Read input. */
517 PFNDBGCBACKREAD pfnRead;
518 /** Write output. */
519 PFNDBGCBACKWRITE pfnWrite;
520} DBGCBACK;
521
522
523/**
524 * Make a console instance.
525 *
526 * This will not return until either an 'exit' command is issued or a error code
527 * indicating connection loss is encountered.
528 *
529 * @returns VINF_SUCCESS if console termination caused by the 'exit' command.
530 * @returns The VBox status code causing the console termination.
531 *
532 * @param pVM VM Handle.
533 * @param pBack Pointer to the backend structure. This must contain
534 * a full set of function pointers to service the console.
535 * @param fFlags Reserved, must be zero.
536 * @remark A forced termination of the console is easiest done by forcing the
537 * callbacks to return fatal failures.
538 */
539DBGDECL(int) DBGCCreate(PVM pVM, PDBGCBACK pBack, unsigned fFlags);
540
541
542/**
543 * Register one or more external commands.
544 *
545 * @returns VBox status.
546 * @param paCommands Pointer to an array of command descriptors.
547 * The commands must be unique. It's not possible
548 * to register the same commands more than once.
549 * @param cCommands Number of commands.
550 */
551DBGDECL(int) DBGCRegisterCommands(PCDBGCCMD paCommands, unsigned cCommands);
552
553
554/**
555 * Deregister one or more external commands previously registered by
556 * DBGCRegisterCommands().
557 *
558 * @returns VBox status.
559 * @param paCommands Pointer to an array of command descriptors
560 * as given to DBGCRegisterCommands().
561 * @param cCommands Number of commands.
562 */
563DBGDECL(int) DBGCDeregisterCommands(PCDBGCCMD paCommands, unsigned cCommands);
564
565
566/**
567 * Spawns a new thread with a TCP based debugging console service.
568 *
569 * @returns VBox status.
570 * @param pVM VM handle.
571 * @param ppvData Where to store the pointer to instance data.
572 */
573DBGDECL(int) DBGCTcpCreate(PVM pVM, void **ppvUser);
574
575/**
576 * Terminates any running TCP base debugger consolse service.
577 *
578 * @returns VBox status.
579 * @param pVM VM handle.
580 * @param pvData Instance data set by DBGCTcpCreate().
581 */
582DBGDECL(int) DBGCTcpTerminate(PVM pVM, void *pvData);
583
584
585__END_DECLS
586
587#endif
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