DBGConsole.cpp@ 12466

Last change on this file since 12466 was 9838, checked in by vboxsync, 16 years ago
Fix for parsing nonsense.
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File size: 66.6 KB

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1	/** $Id: DBGConsole.cpp 9838 2008-06-20 09:06:35Z vboxsync $ */
2	/** @file
3	* DBGC - Debugger Console.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/** @page pg_dbgc DBGC - The Debug Console
24	*
25	* The debugger console is an early attempt to make some interactive
26	* debugging facilities for the VirtualBox VMM. It was initially only
27	* accessible thru a telnet session on debug builds. Later it was hastily
28	* built into the VBoxDbg module with a very simple Qt wrapper around it.
29	*
30	* The debugger is optional and presently not built into release builds
31	* of VirtualBox. It is therefore necessary to enclose code related to it
32	* in \#ifdef VBOX_WITH_DEBUGGER blocks. This is mandatory for components
33	* that register extenral commands.
34	*
35	*
36	* @section sec_dbgc_op Operation (intentions)
37	*
38	* The console will process commands in a manner similar to the OS/2 and
39	* windows kernel debuggers. This means ';' is a command separator and
40	* that when possible we'll use the same command names as these two uses.
41	*
42	*
43	* @subsection sec_dbg_op_numbers Numbers
44	*
45	* Numbers are hexadecimal unless specified with a prefix indicating
46	* elsewise. Prefixes:
47	* - '0x' - hexadecimal.
48	* - '0i' - decimal
49	* - '0t' - octal.
50	* - '0y' - binary.
51	*
52	* Some of the prefixes are a bit uncommon, the reason for this that
53	* the typical binary prefix '0b' can also be a hexadecimal value since
54	* no prefix or suffix is required for such values. Ditto for '0d' and
55	* '0' for decimal and octal.
56	*
57	*
58	* @subsection sec_dbg_op_address Addressing modes
59	*
60	* - Default is flat. For compatability '%' also means flat.
61	* - Segmented addresses are specified selector:offset.
62	* - Physical addresses are specified using '%%'.
63	* - The default target for the addressing is the guest context, the '#'
64	* will override this and set it to the host.
65	* Note that several operations won't work on host addresses.
66	*
67	* The '%', '%%' and '#' prefixes is implemented as unary operators, while ':'
68	* is a binary operator. Operator precedence takes care of evaluation order.
69	*
70	*
71	* @subsection sec_dbg_op_evalution Evaluation
72	*
73	* Most unary and binary C operators are supported, check the help text for
74	* details. However, some of these are not yet implemented because this is
75	* tiresome and annoying work. So, if something is missing and you need it
76	* you implement it or complain to bird. (Ditto for missing functions.)
77	*
78	* Simple variable support is provided thru the 'set' and 'unset' commands and
79	* the unary '$' operator.
80	*
81	* The unary '@' operator will indicate function calls. Commands and functions
82	* are the same thing, except that functions has a return type.
83	*
84	*
85	* @subsection sec_dbg_op_registers Registers
86	*
87	* Registers are addressed using their name. Some registers which have several fields
88	* (like gdtr) will have separate names indicating the different fields. The default
89	* register set is the guest one. To access the hypervisor register one have to
90	* prefix the register names with '.'.
91	*
92	* The registers are implemented as built-in symbols. For making gdb guys more at
93	* home it is possible to access them with the '$' operator, i.e. as a variable.
94	*
95	*
96	* @subsection sec_dbg_op_commands Commands and Functions
97	*
98	* Commands and functions are the same thing, except that functions may return a
99	* value. So, functions may be used as commands. The command/function handlers
100	* can detect whether they are invoked as a command or function by checking whether
101	* there is a return variable or not.
102	*
103	* The command/function names are all lowercase, case sensitive, and starting
104	* with a letter. Operator characters are not permitted in the names of course.
105	* Space is allowed, but must be flagged so the parser can check for multiple
106	* spaces and tabs. (This feature is for 'dump xyz' and for emulating the
107	* gdb 'info abc'.)
108	*
109	* The '.' prefix indicates the set of external commands. External commands are
110	* command registered by VMM components.
111	*
112	*
113	* @section sec_dbgc_logging Logging
114	*
115	* The idea is to be able to pass thru debug and release logs to the console
116	* if the user so wishes. This feature requires some kind of hook into the
117	* logger instance and while this was sketched it hasn't yet been implemented
118	* (dbgcProcessLog and DBGC::fLog).
119	*
120	*
121	*
122	* @section sec_dbgc_linking Linking and API
123	*
124	* The DBGC code is linked into the VBoxVMM module. (At present it is also
125	* linked into VBoxDbg, but this is obviously very wrong.)
126	*
127	* A COM object will be created for the DBGC so it can be operated remotely
128	* without using TCP. VBoxDbg is the intended audience for this usage. Some
129	* questions about callbacks (for output) and security (you may wish to
130	* restrict users from debugging a VM) needs to be answered first though.
131	*/
132
133
134	/*******************************************************************************
135	* Header Files *
136	*******************************************************************************/
137	#define LOG_GROUP LOG_GROUP_DBGC
138	#include <VBox/dbg.h>
139	#include <VBox/dbgf.h>
140	#include <VBox/vm.h>
141	#include <VBox/vmm.h>
142	#include <VBox/mm.h>
143	#include <VBox/pgm.h>
144	#include <VBox/selm.h>
145	#include <VBox/dis.h>
146	#include <VBox/param.h>
147	#include <VBox/err.h>
148	#include <VBox/log.h>
149
150	#include <iprt/alloc.h>
151	#include <iprt/alloca.h>
152	#include <iprt/string.h>
153	#include <iprt/assert.h>
154	#include <iprt/ctype.h>
155
156	#include <stdlib.h>
157	#include <stdio.h>
158
159	#include "DBGCInternal.h"
160	#include "DBGPlugIns.h"
161
162
163	/*******************************************************************************
164	* Global Variables *
165	*******************************************************************************/
166	/** Bitmap where set bits indicates the characters the may start an operator name. */
167	static uint32_t g_bmOperatorChars[256 / (4*8)];
168
169
170	/*******************************************************************************
171	* Internal Functions *
172	*******************************************************************************/
173	static int dbgcProcessLog(PDBGC pDbgc);
174
175
176
177	/**
178	* Initalizes g_bmOperatorChars.
179	*/
180	static void dbgcInitOpCharBitMap(void)
181	{
182	memset(g_bmOperatorChars, 0, sizeof(g_bmOperatorChars));
183	for (unsigned iOp = 0; iOp < g_cOps; iOp++)
184	ASMBitSet(&g_bmOperatorChars[0], (uint8_t)g_aOps[iOp].szName[0]);
185	}
186
187
188	/**
189	* Checks whether the character may be the start of an operator.
190	*
191	* @returns true/false.
192	* @param ch The character.
193	*/
194	DECLINLINE(bool) dbgcIsOpChar(char ch)
195	{
196	return ASMBitTest(&g_bmOperatorChars[0], (uint8_t)ch);
197	}
198
199
200	/**
201	* Resolves a symbol (or tries to do so at least).
202	*
203	* @returns 0 on success.
204	* @returns VBox status on failure.
205	* @param pDbgc The debug console instance.
206	* @param pszSymbol The symbol name.
207	* @param enmType The result type.
208	* @param pResult Where to store the result.
209	*/
210	int dbgcSymbolGet(PDBGC pDbgc, const char *pszSymbol, DBGCVARTYPE enmType, PDBGCVAR pResult)
211	{
212	/*
213	* Builtin?
214	*/
215	PCDBGCSYM pSymDesc = dbgcLookupRegisterSymbol(pDbgc, pszSymbol);
216	if (pSymDesc)
217	{
218	if (!pSymDesc->pfnGet)
219	return VERR_PARSE_WRITEONLY_SYMBOL;
220	return pSymDesc->pfnGet(pSymDesc, &pDbgc->CmdHlp, enmType, pResult);
221	}
222
223
224	/*
225	* Ask PDM.
226	*/
227	/** @todo resolve symbols using PDM. */
228
229
230	/*
231	* Ask the debug info manager.
232	*/
233	DBGFSYMBOL Symbol;
234	int rc = DBGFR3SymbolByName(pDbgc->pVM, pszSymbol, &Symbol);
235	if (VBOX_SUCCESS(rc))
236	{
237	/*
238	* Default return is a flat gc address.
239	*/
240	memset(pResult, 0, sizeof(*pResult));
241	pResult->enmRangeType = Symbol.cb ? DBGCVAR_RANGE_BYTES : DBGCVAR_RANGE_NONE;
242	pResult->u64Range = Symbol.cb;
243	pResult->enmType = DBGCVAR_TYPE_GC_FLAT;
244	pResult->u.GCFlat = Symbol.Value;
245	DBGCVAR VarTmp;
246	switch (enmType)
247	{
248	/* nothing to do. */
249	case DBGCVAR_TYPE_GC_FLAT:
250	case DBGCVAR_TYPE_GC_FAR:
251	case DBGCVAR_TYPE_ANY:
252	return VINF_SUCCESS;
253
254	/* simply make it numeric. */
255	case DBGCVAR_TYPE_NUMBER:
256	pResult->enmType = DBGCVAR_TYPE_NUMBER;
257	pResult->u.u64Number = Symbol.Value;
258	return VINF_SUCCESS;
259
260	/* cast it. */
261
262	case DBGCVAR_TYPE_GC_PHYS:
263	VarTmp = *pResult;
264	return dbgcOpAddrPhys(pDbgc, &VarTmp, pResult);
265
266	case DBGCVAR_TYPE_HC_FAR:
267	case DBGCVAR_TYPE_HC_FLAT:
268	VarTmp = *pResult;
269	return dbgcOpAddrHost(pDbgc, &VarTmp, pResult);
270
271	case DBGCVAR_TYPE_HC_PHYS:
272	VarTmp = *pResult;
273	return dbgcOpAddrHostPhys(pDbgc, &VarTmp, pResult);
274
275	default:
276	AssertMsgFailed(("Internal error enmType=%d\n", enmType));
277	return VERR_INVALID_PARAMETER;
278	}
279	}
280
281	return VERR_PARSE_NOT_IMPLEMENTED;
282	}
283
284
285	static int dbgcEvalSubString(PDBGC pDbgc, char *pszExpr, size_t cchExpr, PDBGCVAR pArg)
286	{
287	Log2(("dbgcEvalSubString: cchExpr=%d pszExpr=%s\n", cchExpr, pszExpr));
288
289	/*
290	* Removing any quoting and escapings.
291	*/
292	char ch = *pszExpr;
293	if (ch == '"' \|\| ch == '\'' \|\| ch == '`')
294	{
295	if (pszExpr[--cchExpr] != ch)
296	return VERR_PARSE_UNBALANCED_QUOTE;
297	cchExpr--;
298	pszExpr++;
299
300	/** @todo string unescaping. */
301	}
302	pszExpr[cchExpr] = '\0';
303
304	/*
305	* Make the argument.
306	*/
307	pArg->pDesc = NULL;
308	pArg->pNext = NULL;
309	pArg->enmType = DBGCVAR_TYPE_STRING;
310	pArg->u.pszString = pszExpr;
311	pArg->enmRangeType = DBGCVAR_RANGE_BYTES;
312	pArg->u64Range = cchExpr;
313
314	NOREF(pDbgc);
315	return 0;
316	}
317
318
319	static int dbgcEvalSubNum(char *pszExpr, unsigned uBase, PDBGCVAR pArg)
320	{
321	Log2(("dbgcEvalSubNum: uBase=%d pszExpr=%s\n", uBase, pszExpr));
322	/*
323	* Convert to number.
324	*/
325	uint64_t u64 = 0;
326	char ch;
327	while ((ch = *pszExpr) != '\0')
328	{
329	uint64_t u64Prev = u64;
330	unsigned u = ch - '0';
331	if (u < 10 && u < uBase)
332	u64 = u64 * uBase + u;
333	else if (ch >= 'a' && (u = ch - ('a' - 10)) < uBase)
334	u64 = u64 * uBase + u;
335	else if (ch >= 'A' && (u = ch - ('A' - 10)) < uBase)
336	u64 = u64 * uBase + u;
337	else
338	return VERR_PARSE_INVALID_NUMBER;
339
340	/* check for overflow - ARG!!! How to detect overflow correctly!?!?!? */
341	if (u64Prev != u64 / uBase)
342	return VERR_PARSE_NUMBER_TOO_BIG;
343
344	/* next */
345	pszExpr++;
346	}
347
348	/*
349	* Initialize the argument.
350	*/
351	pArg->pDesc = NULL;
352	pArg->pNext = NULL;
353	pArg->enmType = DBGCVAR_TYPE_NUMBER;
354	pArg->u.u64Number = u64;
355	pArg->enmRangeType = DBGCVAR_RANGE_NONE;
356	pArg->u64Range = 0;
357
358	return 0;
359	}
360
361
362	/**
363	* Match variable and variable descriptor, promoting the variable if necessary.
364	*
365	* @returns VBox status code.
366	* @param pDbgc Debug console instanace.
367	* @param pVar Variable.
368	* @param pVarDesc Variable descriptor.
369	*/
370	static int dbgcEvalSubMatchVar(PDBGC pDbgc, PDBGCVAR pVar, PCDBGCVARDESC pVarDesc)
371	{
372	/*
373	* (If match or promoted to match, return, else break.)
374	*/
375	switch (pVarDesc->enmCategory)
376	{
377	/*
378	* Anything goes
379	*/
380	case DBGCVAR_CAT_ANY:
381	return VINF_SUCCESS;
382
383	/*
384	* Pointer with and without range.
385	* We can try resolve strings and symbols as symbols and
386	* promote numbers to flat GC pointers.
387	*/
388	case DBGCVAR_CAT_POINTER_NO_RANGE:
389	if (pVar->enmRangeType != DBGCVAR_RANGE_NONE)
390	return VERR_PARSE_NO_RANGE_ALLOWED;
391	/* fallthru */
392	case DBGCVAR_CAT_POINTER:
393	switch (pVar->enmType)
394	{
395	case DBGCVAR_TYPE_GC_FLAT:
396	case DBGCVAR_TYPE_GC_FAR:
397	case DBGCVAR_TYPE_GC_PHYS:
398	case DBGCVAR_TYPE_HC_FLAT:
399	case DBGCVAR_TYPE_HC_FAR:
400	case DBGCVAR_TYPE_HC_PHYS:
401	return VINF_SUCCESS;
402
403	case DBGCVAR_TYPE_SYMBOL:
404	case DBGCVAR_TYPE_STRING:
405	{
406	DBGCVAR Var;
407	int rc = dbgcSymbolGet(pDbgc, pVar->u.pszString, DBGCVAR_TYPE_GC_FLAT, &Var);
408	if (VBOX_SUCCESS(rc))
409	{
410	/* deal with range */
411	if (pVar->enmRangeType != DBGCVAR_RANGE_NONE)
412	{
413	Var.enmRangeType = pVar->enmRangeType;
414	Var.u64Range = pVar->u64Range;
415	}
416	else if (pVarDesc->enmCategory == DBGCVAR_CAT_POINTER_NO_RANGE)
417	Var.enmRangeType = DBGCVAR_RANGE_NONE;
418	*pVar = Var;
419	return rc;
420	}
421	break;
422	}
423
424	case DBGCVAR_TYPE_NUMBER:
425	{
426	RTGCPTR GCPtr = (RTGCPTR)pVar->u.u64Number;
427	pVar->enmType = DBGCVAR_TYPE_GC_FLAT;
428	pVar->u.GCFlat = GCPtr;
429	return VINF_SUCCESS;
430	}
431
432	default:
433	break;
434	}
435	break;
436
437	/*
438	* GC pointer with and without range.
439	* We can try resolve strings and symbols as symbols and
440	* promote numbers to flat GC pointers.
441	*/
442	case DBGCVAR_CAT_GC_POINTER_NO_RANGE:
443	if (pVar->enmRangeType != DBGCVAR_RANGE_NONE)
444	return VERR_PARSE_NO_RANGE_ALLOWED;
445	/* fallthru */
446	case DBGCVAR_CAT_GC_POINTER:
447	switch (pVar->enmType)
448	{
449	case DBGCVAR_TYPE_GC_FLAT:
450	case DBGCVAR_TYPE_GC_FAR:
451	case DBGCVAR_TYPE_GC_PHYS:
452	return VINF_SUCCESS;
453
454	case DBGCVAR_TYPE_HC_FLAT:
455	case DBGCVAR_TYPE_HC_FAR:
456	case DBGCVAR_TYPE_HC_PHYS:
457	return VERR_PARSE_CONVERSION_FAILED;
458
459	case DBGCVAR_TYPE_SYMBOL:
460	case DBGCVAR_TYPE_STRING:
461	{
462	DBGCVAR Var;
463	int rc = dbgcSymbolGet(pDbgc, pVar->u.pszString, DBGCVAR_TYPE_GC_FLAT, &Var);
464	if (VBOX_SUCCESS(rc))
465	{
466	/* deal with range */
467	if (pVar->enmRangeType != DBGCVAR_RANGE_NONE)
468	{
469	Var.enmRangeType = pVar->enmRangeType;
470	Var.u64Range = pVar->u64Range;
471	}
472	else if (pVarDesc->enmCategory == DBGCVAR_CAT_POINTER_NO_RANGE)
473	Var.enmRangeType = DBGCVAR_RANGE_NONE;
474	*pVar = Var;
475	return rc;
476	}
477	break;
478	}
479
480	case DBGCVAR_TYPE_NUMBER:
481	{
482	RTGCPTR GCPtr = (RTGCPTR)pVar->u.u64Number;
483	pVar->enmType = DBGCVAR_TYPE_GC_FLAT;
484	pVar->u.GCFlat = GCPtr;
485	return VINF_SUCCESS;
486	}
487
488	default:
489	break;
490	}
491	break;
492
493	/*
494	* Number with or without a range.
495	* Numbers can be resolved from symbols, but we cannot demote a pointer
496	* to a number.
497	*/
498	case DBGCVAR_CAT_NUMBER_NO_RANGE:
499	if (pVar->enmRangeType != DBGCVAR_RANGE_NONE)
500	return VERR_PARSE_NO_RANGE_ALLOWED;
501	/* fallthru */
502	case DBGCVAR_CAT_NUMBER:
503	switch (pVar->enmType)
504	{
505	case DBGCVAR_TYPE_NUMBER:
506	return VINF_SUCCESS;
507
508	case DBGCVAR_TYPE_SYMBOL:
509	case DBGCVAR_TYPE_STRING:
510	{
511	DBGCVAR Var;
512	int rc = dbgcSymbolGet(pDbgc, pVar->u.pszString, DBGCVAR_TYPE_NUMBER, &Var);
513	if (VBOX_SUCCESS(rc))
514	{
515	*pVar = Var;
516	return rc;
517	}
518	break;
519	}
520	default:
521	break;
522	}
523	break;
524
525	/*
526	* Strings can easily be made from symbols (and of course strings).
527	* We could consider reformatting the addresses and numbers into strings later...
528	*/
529	case DBGCVAR_CAT_STRING:
530	switch (pVar->enmType)
531	{
532	case DBGCVAR_TYPE_SYMBOL:
533	pVar->enmType = DBGCVAR_TYPE_STRING;
534	/* fallthru */
535	case DBGCVAR_TYPE_STRING:
536	return VINF_SUCCESS;
537	default:
538	break;
539	}
540	break;
541
542	/*
543	* Symol is pretty much the same thing as a string (at least until we actually implement it).
544	*/
545	case DBGCVAR_CAT_SYMBOL:
546	switch (pVar->enmType)
547	{
548	case DBGCVAR_TYPE_STRING:
549	pVar->enmType = DBGCVAR_TYPE_SYMBOL;
550	/* fallthru */
551	case DBGCVAR_TYPE_SYMBOL:
552	return VINF_SUCCESS;
553	default:
554	break;
555	}
556	break;
557
558	/*
559	* Anything else is illegal.
560	*/
561	default:
562	AssertMsgFailed(("enmCategory=%d\n", pVar->enmType));
563	break;
564	}
565
566	return VERR_PARSE_NO_ARGUMENT_MATCH;
567	}
568
569
570	/**
571	* Matches a set of variables with a description set.
572	*
573	* This is typically used for routine arguments before a call. The effects in
574	* addition to the validation, is that some variables might be propagated to
575	* other types in order to match the description. The following transformations
576	* are supported:
577	* - String reinterpreted as a symbol and resolved to a number or pointer.
578	* - Number to a pointer.
579	* - Pointer to a number.
580	* @returns 0 on success with paVars.
581	* @returns VBox error code for match errors.
582	*/
583	static int dbgcEvalSubMatchVars(PDBGC pDbgc, unsigned cVarsMin, unsigned cVarsMax,
584	PCDBGCVARDESC paVarDescs, unsigned cVarDescs,
585	PDBGCVAR paVars, unsigned cVars)
586	{
587	/*
588	* Just do basic min / max checks first.
589	*/
590	if (cVars < cVarsMin)
591	return VERR_PARSE_TOO_FEW_ARGUMENTS;
592	if (cVars > cVarsMax)
593	return VERR_PARSE_TOO_MANY_ARGUMENTS;
594
595	/*
596	* Match the descriptors and actual variables.
597	*/
598	PCDBGCVARDESC pPrevDesc = NULL;
599	unsigned cCurDesc = 0;
600	unsigned iVar = 0;
601	unsigned iVarDesc = 0;
602	while (iVar < cVars)
603	{
604	/* walk the descriptors */
605	if (iVarDesc >= cVarDescs)
606	return VERR_PARSE_TOO_MANY_ARGUMENTS;
607	if ( ( paVarDescs[iVarDesc].fFlags & DBGCVD_FLAGS_DEP_PREV
608	&& &paVarDescs[iVarDesc - 1] != pPrevDesc)
609	\|\| cCurDesc >= paVarDescs[iVarDesc].cTimesMax)
610	{
611	iVarDesc++;
612	if (iVarDesc >= cVarDescs)
613	return VERR_PARSE_TOO_MANY_ARGUMENTS;
614	cCurDesc = 0;
615	}
616
617	/*
618	* Skip thru optional arguments until we find something which matches
619	* or can easily be promoted to what the descriptor want.
620	*/
621	for (;;)
622	{
623	int rc = dbgcEvalSubMatchVar(pDbgc, &paVars[iVar], &paVarDescs[iVarDesc]);
624	if (VBOX_SUCCESS(rc))
625	{
626	paVars[iVar].pDesc = &paVarDescs[iVarDesc];
627	cCurDesc++;
628	break;
629	}
630
631	/* can we advance? */
632	if (paVarDescs[iVarDesc].cTimesMin > cCurDesc)
633	return VERR_PARSE_ARGUMENT_TYPE_MISMATCH;
634	if (++iVarDesc >= cVarDescs)
635	return VERR_PARSE_ARGUMENT_TYPE_MISMATCH;
636	cCurDesc = 0;
637	}
638
639	/* next var */
640	iVar++;
641	}
642
643	/*
644	* Check that the rest of the descriptors are optional.
645	*/
646	while (iVarDesc < cVarDescs)
647	{
648	if (paVarDescs[iVarDesc].cTimesMin > cCurDesc)
649	return VERR_PARSE_TOO_FEW_ARGUMENTS;
650	cCurDesc = 0;
651
652	/* next */
653	iVarDesc++;
654	}
655
656	return 0;
657	}
658
659
660	/**
661	* Evaluates one argument with respect to unary operators.
662	*
663	* @returns 0 on success. pResult contains the result.
664	* @returns VBox error code on parse or other evaluation error.
665	*
666	* @param pDbgc Debugger console instance data.
667	* @param pszExpr The expression string.
668	* @param pResult Where to store the result of the expression evaluation.
669	*/
670	static int dbgcEvalSubUnary(PDBGC pDbgc, char *pszExpr, size_t cchExpr, PDBGCVAR pResult)
671	{
672	Log2(("dbgcEvalSubUnary: cchExpr=%d pszExpr=%s\n", cchExpr, pszExpr));
673
674	/*
675	* The state of the expression is now such that it will start by zero or more
676	* unary operators and being followed by an expression of some kind.
677	* The expression is either plain or in parenthesis.
678	*
679	* Being in a lazy, recursive mode today, the parsing is done as simple as possible. :-)
680	* ASSUME: unary operators are all of equal precedence.
681	*/
682	int rc = 0;
683	PCDBGCOP pOp = dbgcOperatorLookup(pDbgc, pszExpr, false, ' ');
684	if (pOp)
685	{
686	/* binary operators means syntax error. */
687	if (pOp->fBinary)
688	return VERR_PARSE_UNEXPECTED_OPERATOR;
689
690	/*
691	* If the next expression (the one following the unary operator) is in a
692	* parenthesis a full eval is needed. If not the unary eval will suffice.
693	*/
694	/* calc and strip next expr. */
695	char *pszExpr2 = pszExpr + pOp->cchName;
696	while (isblank(*pszExpr2))
697	pszExpr2++;
698
699	if (!*pszExpr2)
700	rc = VERR_PARSE_EMPTY_ARGUMENT;
701	else
702	{
703	DBGCVAR Arg;
704	if (*pszExpr2 == '(')
705	rc = dbgcEvalSub(pDbgc, pszExpr2, cchExpr - (pszExpr2 - pszExpr), &Arg);
706	else
707	rc = dbgcEvalSubUnary(pDbgc, pszExpr2, cchExpr - (pszExpr2 - pszExpr), &Arg);
708	if (VBOX_SUCCESS(rc))
709	rc = pOp->pfnHandlerUnary(pDbgc, &Arg, pResult);
710	}
711	}
712	else
713	{
714	/*
715	* Didn't find any operators, so it we have to check if this can be an
716	* function call before assuming numeric or string expression.
717	*
718	* (ASSUMPTIONS:)
719	* A function name only contains alphanumerical chars and it can not start
720	* with a numerical character.
721	* Immediately following the name is a parenthesis which must over
722	* the remaining part of the expression.
723	*/
724	bool fExternal = *pszExpr == '.';
725	char *pszFun = fExternal ? pszExpr + 1 : pszExpr;
726	char *pszFunEnd = NULL;
727	if (pszExpr[cchExpr - 1] == ')' && isalpha(*pszFun))
728	{
729	pszFunEnd = pszExpr + 1;
730	while (pszFunEnd != '(' && isalnum(pszFunEnd))
731	pszFunEnd++;
732	if (*pszFunEnd != '(')
733	pszFunEnd = NULL;
734	}
735
736	if (pszFunEnd)
737	{
738	/*
739	* Ok, it's a function call.
740	*/
741	if (fExternal)
742	pszExpr++, cchExpr--;
743	PCDBGCCMD pFun = dbgcRoutineLookup(pDbgc, pszExpr, pszFunEnd - pszExpr, fExternal);
744	if (!pFun)
745	return VERR_PARSE_FUNCTION_NOT_FOUND;
746	if (!pFun->pResultDesc)
747	return VERR_PARSE_NOT_A_FUNCTION;
748
749	/*
750	* Parse the expression in parenthesis.
751	*/
752	cchExpr -= pszFunEnd - pszExpr;
753	pszExpr = pszFunEnd;
754	/** @todo implement multiple arguments. */
755	DBGCVAR Arg;
756	rc = dbgcEvalSub(pDbgc, pszExpr, cchExpr, &Arg);
757	if (!rc)
758	{
759	rc = dbgcEvalSubMatchVars(pDbgc, pFun->cArgsMin, pFun->cArgsMax, pFun->paArgDescs, pFun->cArgDescs, &Arg, 1);
760	if (!rc)
761	rc = pFun->pfnHandler(pFun, &pDbgc->CmdHlp, pDbgc->pVM, &Arg, 1, pResult);
762	}
763	else if (rc == VERR_PARSE_EMPTY_ARGUMENT && pFun->cArgsMin == 0)
764	rc = pFun->pfnHandler(pFun, &pDbgc->CmdHlp, pDbgc->pVM, NULL, 0, pResult);
765	}
766	else
767	{
768	/*
769	* Didn't find any operators, so it must be a plain expression.
770	* This might be numeric or a string expression.
771	*/
772	char ch = pszExpr[0];
773	char ch2 = pszExpr[1];
774	if (ch == '0' && (ch2 == 'x' \|\| ch2 == 'X'))
775	rc = dbgcEvalSubNum(pszExpr + 2, 16, pResult);
776	else if (ch == '0' && (ch2 == 'i' \|\| ch2 == 'i'))
777	rc = dbgcEvalSubNum(pszExpr + 2, 10, pResult);
778	else if (ch == '0' && (ch2 == 't' \|\| ch2 == 'T'))
779	rc = dbgcEvalSubNum(pszExpr + 2, 8, pResult);
780	/// @todo 0b doesn't work as a binary prefix, we confuse it with 0bf8:0123 and stuff.
781	//else if (ch == '0' && (ch2 == 'b' \|\| ch2 == 'b'))
782	// rc = dbgcEvalSubNum(pszExpr + 2, 2, pResult);
783	else
784	{
785	/*
786	* Hexadecimal number or a string?
787	*/
788	char *psz = pszExpr;
789	while (isxdigit(*psz))
790	psz++;
791	if (!*psz)
792	rc = dbgcEvalSubNum(pszExpr, 16, pResult);
793	else if ((psz == 'h' \|\| psz == 'H') && !psz[1])
794	{
795	*psz = '\0';
796	rc = dbgcEvalSubNum(pszExpr, 16, pResult);
797	}
798	else
799	rc = dbgcEvalSubString(pDbgc, pszExpr, cchExpr, pResult);
800	}
801	}
802	}
803
804	return rc;
805	}
806
807
808	/**
809	* Evaluates one argument.
810	*
811	* @returns 0 on success. pResult contains the result.
812	* @returns VBox error code on parse or other evaluation error.
813	*
814	* @param pDbgc Debugger console instance data.
815	* @param pszExpr The expression string.
816	* @param pResult Where to store the result of the expression evaluation.
817	*/
818	int dbgcEvalSub(PDBGC pDbgc, char *pszExpr, size_t cchExpr, PDBGCVAR pResult)
819	{
820	Log2(("dbgcEvalSub: cchExpr=%d pszExpr=%s\n", cchExpr, pszExpr));
821	/*
822	* First we need to remove blanks in both ends.
823	* ASSUMES: There is no quoting unless the entire expression is a string.
824	*/
825
826	/* stripping. */
827	while (cchExpr > 0 && isblank(pszExpr[cchExpr - 1]))
828	pszExpr[--cchExpr] = '\0';
829	while (isblank(*pszExpr))
830	pszExpr++, cchExpr--;
831	if (!*pszExpr)
832	return VERR_PARSE_EMPTY_ARGUMENT;
833
834	/* it there is any kind of quoting in the expression, it's string meat. */
835	if (strpbrk(pszExpr, "\"'`"))
836	return dbgcEvalSubString(pDbgc, pszExpr, cchExpr, pResult);
837
838	/*
839	* Check if there are any parenthesis which needs removing.
840	*/
841	if (pszExpr[0] == '(' && pszExpr[cchExpr - 1] == ')')
842	{
843	do
844	{
845	unsigned cPar = 1;
846	char *psz = pszExpr + 1;
847	char ch;
848	while ((ch = *psz) != '\0')
849	{
850	if (ch == '(')
851	cPar++;
852	else if (ch == ')')
853	{
854	if (cPar <= 0)
855	return VERR_PARSE_UNBALANCED_PARENTHESIS;
856	cPar--;
857	if (cPar == 0 && psz[1]) /* If not at end, there's nothing to do. */
858	break;
859	}
860	/* next */
861	psz++;
862	}
863	if (ch)
864	break;
865
866	/* remove the parenthesis. */
867	pszExpr++;
868	cchExpr -= 2;
869	pszExpr[cchExpr] = '\0';
870
871	/* strip blanks. */
872	while (cchExpr > 0 && isblank(pszExpr[cchExpr - 1]))
873	pszExpr[--cchExpr] = '\0';
874	while (isblank(*pszExpr))
875	pszExpr++, cchExpr--;
876	if (!*pszExpr)
877	return VERR_PARSE_EMPTY_ARGUMENT;
878	} while (pszExpr[0] == '(' && pszExpr[cchExpr - 1] == ')');
879	}
880
881	/* tabs to spaces. */
882	char *psz = pszExpr;
883	while ((psz = strchr(psz, '\t')) != NULL)
884	*psz = ' ';
885
886	/*
887	* Now, we need to look for the binary operator with the lowest precedence.
888	*
889	* If there are no operators we're left with a simple expression which we
890	* evaluate with respect to unary operators
891	*/
892	char *pszOpSplit = NULL;
893	PCDBGCOP pOpSplit = NULL;
894	unsigned cBinaryOps = 0;
895	unsigned cPar = 0;
896	char ch;
897	char chPrev = ' ';
898	bool fBinary = false;
899	psz = pszExpr;
900
901	while ((ch = *psz) != '\0')
902	{
903	//Log2(("ch=%c cPar=%d fBinary=%d\n", ch, cPar, fBinary));
904	/*
905	* Parenthesis.
906	*/
907	if (ch == '(')
908	{
909	cPar++;
910	fBinary = false;
911	}
912	else if (ch == ')')
913	{
914	if (cPar <= 0)
915	return VERR_PARSE_UNBALANCED_PARENTHESIS;
916	cPar--;
917	fBinary = true;
918	}
919	/*
920	* Potential operator.
921	*/
922	else if (cPar == 0 && !isblank(ch))
923	{
924	PCDBGCOP pOp = dbgcIsOpChar(ch)
925	? dbgcOperatorLookup(pDbgc, psz, fBinary, chPrev)
926	: NULL;
927	if (pOp)
928	{
929	/* If not the right kind of operator we've got a syntax error. */
930	if (pOp->fBinary != fBinary)
931	return VERR_PARSE_UNEXPECTED_OPERATOR;
932
933	/*
934	* Update the parse state and skip the operator.
935	*/
936	if (!pOpSplit)
937	{
938	pOpSplit = pOp;
939	pszOpSplit = psz;
940	cBinaryOps = fBinary;
941	}
942	else if (fBinary)
943	{
944	cBinaryOps++;
945	if (pOp->iPrecedence >= pOpSplit->iPrecedence)
946	{
947	pOpSplit = pOp;
948	pszOpSplit = psz;
949	}
950	}
951
952	psz += pOp->cchName - 1;
953	fBinary = false;
954	}
955	else
956	fBinary = true;
957	}
958
959	/* next */
960	psz++;
961	chPrev = ch;
962	} /* parse loop. */
963
964
965	/*
966	* Either we found an operator to divide the expression by
967	* or we didn't find any. In the first case it's divide and
968	* conquer. In the latter it's a single expression which
969	* needs dealing with its unary operators if any.
970	*/
971	int rc;
972	if ( cBinaryOps
973	&& pOpSplit->fBinary)
974	{
975	/* process 1st sub expression. */
976	*pszOpSplit = '\0';
977	DBGCVAR Arg1;
978	rc = dbgcEvalSub(pDbgc, pszExpr, pszOpSplit - pszExpr, &Arg1);
979	if (VBOX_SUCCESS(rc))
980	{
981	/* process 2nd sub expression. */
982	char *psz2 = pszOpSplit + pOpSplit->cchName;
983	DBGCVAR Arg2;
984	rc = dbgcEvalSub(pDbgc, psz2, cchExpr - (psz2 - pszExpr), &Arg2);
985	if (VBOX_SUCCESS(rc))
986	/* apply the operator. */
987	rc = pOpSplit->pfnHandlerBinary(pDbgc, &Arg1, &Arg2, pResult);
988	}
989	}
990	else if (cBinaryOps)
991	{
992	/* process sub expression. */
993	pszOpSplit += pOpSplit->cchName;
994	DBGCVAR Arg;
995	rc = dbgcEvalSub(pDbgc, pszOpSplit, cchExpr - (pszOpSplit - pszExpr), &Arg);
996	if (VBOX_SUCCESS(rc))
997	/* apply the operator. */
998	rc = pOpSplit->pfnHandlerUnary(pDbgc, &Arg, pResult);
999	}
1000	else
1001	/* plain expression or using unary operators perhaps with paratheses. */
1002	rc = dbgcEvalSubUnary(pDbgc, pszExpr, cchExpr, pResult);
1003
1004	return rc;
1005	}
1006
1007
1008	/**
1009	* Parses the arguments of one command.
1010	*
1011	* @returns 0 on success.
1012	* @returns VBox error code on parse error with *pcArg containing the argument causing trouble.
1013	* @param pDbgc Debugger console instance data.
1014	* @param pCmd Pointer to the command descriptor.
1015	* @param pszArg Pointer to the arguments to parse.
1016	* @param paArgs Where to store the parsed arguments.
1017	* @param cArgs Size of the paArgs array.
1018	* @param pcArgs Where to store the number of arguments.
1019	* In the event of an error this is used to store the index of the offending argument.
1020	*/
1021	static int dbgcProcessArguments(PDBGC pDbgc, PCDBGCCMD pCmd, char pszArgs, PDBGCVAR paArgs, unsigned cArgs, unsigned pcArgs)
1022	{
1023	Log2(("dbgcProcessArguments: pCmd=%s pszArgs='%s'\n", pCmd->pszCmd, pszArgs));
1024	/*
1025	* Check if we have any argument and if the command takes any.
1026	*/
1027	*pcArgs = 0;
1028	/* strip leading blanks. */
1029	while (pszArgs && isblank(pszArgs))
1030	pszArgs++;
1031	if (!*pszArgs)
1032	{
1033	if (!pCmd->cArgsMin)
1034	return 0;
1035	return VERR_PARSE_TOO_FEW_ARGUMENTS;
1036	}
1037	/** @todo fixme - foo() doesn't work. */
1038	if (!pCmd->cArgsMax)
1039	return VERR_PARSE_TOO_MANY_ARGUMENTS;
1040
1041	/*
1042	* This is a hack, it's "temporary" and should go away "when" the parser is
1043	* modified to match arguments while parsing.
1044	*/
1045	if ( pCmd->cArgsMax == 1
1046	&& pCmd->cArgsMin == 1
1047	&& pCmd->cArgDescs == 1
1048	&& pCmd->paArgDescs[0].enmCategory == DBGCVAR_CAT_STRING
1049	&& cArgs >= 1)
1050	{
1051	*pcArgs = 1;
1052	RTStrStripR(pszArgs);
1053	return dbgcEvalSubString(pDbgc, pszArgs, strlen(pszArgs), &paArgs[0]);
1054	}
1055
1056
1057	/*
1058	* The parse loop.
1059	*/
1060	PDBGCVAR pArg0 = &paArgs[0];
1061	PDBGCVAR pArg = pArg0;
1062	*pcArgs = 0;
1063	do
1064	{
1065	/*
1066	* Can we have another argument?
1067	*/
1068	if (*pcArgs >= pCmd->cArgsMax)
1069	return VERR_PARSE_TOO_MANY_ARGUMENTS;
1070	if (pArg >= &paArgs[cArgs])
1071	return VERR_PARSE_ARGUMENT_OVERFLOW;
1072
1073	/*
1074	* Find the end of the argument.
1075	*/
1076	int cPar = 0;
1077	char chQuote = '\0';
1078	char *pszEnd = NULL;
1079	char *psz = pszArgs;
1080	char ch;
1081	bool fBinary = false;
1082	for (;;)
1083	{
1084	/*
1085	* Check for the end.
1086	*/
1087	if ((ch = *psz) == '\0')
1088	{
1089	if (chQuote)
1090	return VERR_PARSE_UNBALANCED_QUOTE;
1091	if (cPar)
1092	return VERR_PARSE_UNBALANCED_PARENTHESIS;
1093	pszEnd = psz;
1094	break;
1095	}
1096	/*
1097	* When quoted we ignore everything but the quotation char.
1098	* We use the REXX way of escaping the quotation char, i.e. double occurence.
1099	*/
1100	else if (ch == '\'' \|\| ch == '"' \|\| ch == '`')
1101	{
1102	if (chQuote)
1103	{
1104	/* end quote? */
1105	if (ch == chQuote)
1106	{
1107	if (psz[1] == ch)
1108	psz++; /* skip the escaped quote char */
1109	else
1110	chQuote = '\0'; /* end of quoted string. */
1111	}
1112	}
1113	else
1114	chQuote = ch; /* open new quote */
1115	}
1116	/*
1117	* Parenthesis can of course be nested.
1118	*/
1119	else if (ch == '(')
1120	{
1121	cPar++;
1122	fBinary = false;
1123	}
1124	else if (ch == ')')
1125	{
1126	if (!cPar)
1127	return VERR_PARSE_UNBALANCED_PARENTHESIS;
1128	cPar--;
1129	fBinary = true;
1130	}
1131	else if (!chQuote && !cPar)
1132	{
1133	/*
1134	* Encountering blanks may mean the end of it all. A binary operator
1135	* will force continued parsing.
1136	*/
1137	if (isblank(*psz))
1138	{
1139	pszEnd = psz++; /* just in case. */
1140	while (isblank(*psz))
1141	psz++;
1142	PCDBGCOP pOp = dbgcOperatorLookup(pDbgc, psz, fBinary, ' ');
1143	if (!pOp \|\| pOp->fBinary != fBinary)
1144	break; /* the end. */
1145	psz += pOp->cchName;
1146	while (isblank(psz)) / skip blanks so we don't get here again */
1147	psz++;
1148	fBinary = false;
1149	continue;
1150	}
1151
1152	/*
1153	* Look for operators without a space up front.
1154	*/
1155	if (dbgcIsOpChar(*psz))
1156	{
1157	PCDBGCOP pOp = dbgcOperatorLookup(pDbgc, psz, fBinary, ' ');
1158	if (pOp)
1159	{
1160	if (pOp->fBinary != fBinary)
1161	{
1162	pszEnd = psz;
1163	/** @todo this is a parsing error really. */
1164	break; /* the end. */
1165	}
1166	psz += pOp->cchName;
1167	while (isblank(psz)) / skip blanks so we don't get here again */
1168	psz++;
1169	fBinary = false;
1170	continue;
1171	}
1172	}
1173	fBinary = true;
1174	}
1175
1176	/* next char */
1177	psz++;
1178	}
1179	*pszEnd = '\0';
1180	/* (psz = next char to process) */
1181
1182	/*
1183	* Parse and evaluate the argument.
1184	*/
1185	int rc = dbgcEvalSub(pDbgc, pszArgs, strlen(pszArgs), pArg);
1186	if (VBOX_FAILURE(rc))
1187	return rc;
1188
1189	/*
1190	* Next.
1191	*/
1192	pArg++;
1193	(*pcArgs)++;
1194	pszArgs = psz;
1195	while (pszArgs && isblank(pszArgs))
1196	pszArgs++;
1197	} while (*pszArgs);
1198
1199	/*
1200	* Match the arguments.
1201	*/
1202	return dbgcEvalSubMatchVars(pDbgc, pCmd->cArgsMin, pCmd->cArgsMax, pCmd->paArgDescs, pCmd->cArgDescs, pArg0, pArg - pArg0);
1203	}
1204
1205
1206	/**
1207	* Process one command.
1208	*
1209	* @returns VBox status code. Any error indicates the termination of the console session.
1210	* @param pDbgc Debugger console instance data.
1211	* @param pszCmd Pointer to the command.
1212	* @param cchCmd Length of the command.
1213	* @param fNoExecute Indicates that no commands should actually be executed.
1214	*/
1215	int dbgcProcessCommand(PDBGC pDbgc, char *pszCmd, size_t cchCmd, bool fNoExecute)
1216	{
1217	char *pszCmdInput = pszCmd;
1218
1219	/*
1220	* Skip blanks.
1221	*/
1222	while (isblank(*pszCmd))
1223	pszCmd++, cchCmd--;
1224
1225	/* external command? */
1226	bool fExternal = *pszCmd == '.';
1227	if (fExternal)
1228	pszCmd++, cchCmd--;
1229
1230	/*
1231	* Find arguments.
1232	*/
1233	char *pszArgs = pszCmd;
1234	while (isalnum(*pszArgs))
1235	pszArgs++;
1236	if (pszArgs && (!isblank(pszArgs) \|\| pszArgs == pszCmd))
1237	{
1238	pDbgc->rcCmd = VINF_PARSE_INVALD_COMMAND_NAME;
1239	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Syntax error in command '%s'!\n", pszCmdInput);
1240	return 0;
1241	}
1242
1243	/*
1244	* Find the command.
1245	*/
1246	PCDBGCCMD pCmd = dbgcRoutineLookup(pDbgc, pszCmd, pszArgs - pszCmd, fExternal);
1247	if (!pCmd \|\| (pCmd->fFlags & DBGCCMD_FLAGS_FUNCTION))
1248	{
1249	pDbgc->rcCmd = VINF_PARSE_COMMAND_NOT_FOUND;
1250	return pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Unknown command '%s'!\n", pszCmdInput);
1251	}
1252
1253	/*
1254	* Parse arguments (if any).
1255	*/
1256	unsigned cArgs;
1257	int rc = dbgcProcessArguments(pDbgc, pCmd, pszArgs, &pDbgc->aArgs[pDbgc->iArg], ELEMENTS(pDbgc->aArgs) - pDbgc->iArg, &cArgs);
1258
1259	/*
1260	* Execute the command.
1261	*/
1262	if (!rc)
1263	{
1264	if (!fNoExecute)
1265	rc = pCmd->pfnHandler(pCmd, &pDbgc->CmdHlp, pDbgc->pVM, &pDbgc->aArgs[0], cArgs, NULL);
1266	pDbgc->rcCmd = rc;
1267	if (rc == VERR_DBGC_COMMAND_FAILED)
1268	rc = VINF_SUCCESS;
1269	}
1270	else
1271	{
1272	pDbgc->rcCmd = rc;
1273
1274	/* report parse / eval error. */
1275	switch (rc)
1276	{
1277	case VERR_PARSE_TOO_FEW_ARGUMENTS:
1278	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1279	"Syntax error: Too few arguments. Minimum is %d for command '%s'.\n", pCmd->cArgsMin, pCmd->pszCmd);
1280	break;
1281	case VERR_PARSE_TOO_MANY_ARGUMENTS:
1282	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1283	"Syntax error: Too many arguments. Maximum is %d for command '%s'.\n", pCmd->cArgsMax, pCmd->pszCmd);
1284	break;
1285	case VERR_PARSE_ARGUMENT_OVERFLOW:
1286	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1287	"Syntax error: Too many arguments.\n");
1288	break;
1289	case VERR_PARSE_UNBALANCED_QUOTE:
1290	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1291	"Syntax error: Unbalanced quote (argument %d).\n", cArgs);
1292	break;
1293	case VERR_PARSE_UNBALANCED_PARENTHESIS:
1294	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1295	"Syntax error: Unbalanced parenthesis (argument %d).\n", cArgs);
1296	break;
1297	case VERR_PARSE_EMPTY_ARGUMENT:
1298	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1299	"Syntax error: An argument or subargument contains nothing useful (argument %d).\n", cArgs);
1300	break;
1301	case VERR_PARSE_UNEXPECTED_OPERATOR:
1302	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1303	"Syntax error: Invalid operator usage (argument %d).\n", cArgs);
1304	break;
1305	case VERR_PARSE_INVALID_NUMBER:
1306	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1307	"Syntax error: Ivalid numeric value (argument %d). If a string was the intention, then quote it.\n", cArgs);
1308	break;
1309	case VERR_PARSE_NUMBER_TOO_BIG:
1310	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1311	"Error: Numeric overflow (argument %d).\n", cArgs);
1312	break;
1313	case VERR_PARSE_INVALID_OPERATION:
1314	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1315	"Error: Invalid operation attempted (argument %d).\n", cArgs);
1316	break;
1317	case VERR_PARSE_FUNCTION_NOT_FOUND:
1318	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1319	"Error: Function not found (argument %d).\n", cArgs);
1320	break;
1321	case VERR_PARSE_NOT_A_FUNCTION:
1322	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1323	"Error: The function specified is not a function (argument %d).\n", cArgs);
1324	break;
1325	case VERR_PARSE_NO_MEMORY:
1326	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1327	"Error: Out memory in the regular heap! Expect odd stuff to happen...\n", cArgs);
1328	break;
1329	case VERR_PARSE_INCORRECT_ARG_TYPE:
1330	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1331	"Error: Incorrect argument type (argument %d?).\n", cArgs);
1332	break;
1333	case VERR_PARSE_VARIABLE_NOT_FOUND:
1334	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1335	"Error: An undefined variable was referenced (argument %d).\n", cArgs);
1336	break;
1337	case VERR_PARSE_CONVERSION_FAILED:
1338	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1339	"Error: A conversion between two types failed (argument %d).\n", cArgs);
1340	break;
1341	case VERR_PARSE_NOT_IMPLEMENTED:
1342	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1343	"Error: You hit a debugger feature which isn't implemented yet (argument %d).\n", cArgs);
1344	break;
1345	case VERR_PARSE_BAD_RESULT_TYPE:
1346	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1347	"Error: Couldn't satisfy a request for a specific result type (argument %d). (Usually applies to symbols)\n", cArgs);
1348	break;
1349	case VERR_PARSE_WRITEONLY_SYMBOL:
1350	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1351	"Error: Cannot get symbol, it's set only (argument %d).\n", cArgs);
1352	break;
1353
1354	case VERR_DBGC_COMMAND_FAILED:
1355	rc = VINF_SUCCESS;
1356	break;
1357
1358	default:
1359	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1360	"Error: Unknown error %d!\n", rc);
1361	return rc;
1362	}
1363
1364	/*
1365	* Parse errors are non fatal.
1366	*/
1367	if (rc >= VERR_PARSE_FIRST && rc < VERR_PARSE_LAST)
1368	rc = VINF_SUCCESS;
1369	}
1370
1371	return rc;
1372	}
1373
1374
1375	/**
1376	* Process all commands currently in the buffer.
1377	*
1378	* @returns VBox status code. Any error indicates the termination of the console session.
1379	* @param pDbgc Debugger console instance data.
1380	* @param fNoExecute Indicates that no commands should actually be executed.
1381	*/
1382	static int dbgcProcessCommands(PDBGC pDbgc, bool fNoExecute)
1383	{
1384	int rc = 0;
1385	while (pDbgc->cInputLines)
1386	{
1387	/*
1388	* Empty the log buffer if we're hooking the log.
1389	*/
1390	if (pDbgc->fLog)
1391	{
1392	rc = dbgcProcessLog(pDbgc);
1393	if (VBOX_FAILURE(rc))
1394	break;
1395	}
1396
1397	if (pDbgc->iRead == pDbgc->iWrite)
1398	{
1399	AssertMsgFailed(("The input buffer is empty while cInputLines=%d!\n", pDbgc->cInputLines));
1400	pDbgc->cInputLines = 0;
1401	return 0;
1402	}
1403
1404	/*
1405	* Copy the command to the parse buffer.
1406	*/
1407	char ch;
1408	char *psz = &pDbgc->achInput[pDbgc->iRead];
1409	char *pszTrg = &pDbgc->achScratch[0];
1410	while ((pszTrg = ch = psz++) != ';' && ch != '\n' )
1411	{
1412	if (psz == &pDbgc->achInput[sizeof(pDbgc->achInput)])
1413	psz = &pDbgc->achInput[0];
1414
1415	if (psz == &pDbgc->achInput[pDbgc->iWrite])
1416	{
1417	AssertMsgFailed(("The buffer contains no commands while cInputLines=%d!\n", pDbgc->cInputLines));
1418	pDbgc->cInputLines = 0;
1419	return 0;
1420	}
1421
1422	pszTrg++;
1423	}
1424	*pszTrg = '\0';
1425
1426	/*
1427	* Advance the buffer.
1428	*/
1429	pDbgc->iRead = psz - &pDbgc->achInput[0];
1430	if (ch == '\n')
1431	pDbgc->cInputLines--;
1432
1433	/*
1434	* Parse and execute this command.
1435	*/
1436	pDbgc->pszScratch = psz;
1437	pDbgc->iArg = 0;
1438	rc = dbgcProcessCommand(pDbgc, &pDbgc->achScratch[0], psz - &pDbgc->achScratch[0] - 1, fNoExecute);
1439	if (rc)
1440	break;
1441	}
1442
1443	return rc;
1444	}
1445
1446
1447	/**
1448	* Handle input buffer overflow.
1449	*
1450	* Will read any available input looking for a '\n' to reset the buffer on.
1451	*
1452	* @returns VBox status.
1453	* @param pDbgc Debugger console instance data.
1454	*/
1455	static int dbgcInputOverflow(PDBGC pDbgc)
1456	{
1457	/*
1458	* Assert overflow status and reset the input buffer.
1459	*/
1460	if (!pDbgc->fInputOverflow)
1461	{
1462	pDbgc->fInputOverflow = true;
1463	pDbgc->iRead = pDbgc->iWrite = 0;
1464	pDbgc->cInputLines = 0;
1465	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Input overflow!!\n");
1466	}
1467
1468	/*
1469	* Eat input till no more or there is a '\n'.
1470	* When finding a '\n' we'll continue normal processing.
1471	*/
1472	while (pDbgc->pBack->pfnInput(pDbgc->pBack, 0))
1473	{
1474	size_t cbRead;
1475	int rc = pDbgc->pBack->pfnRead(pDbgc->pBack, &pDbgc->achInput[0], sizeof(pDbgc->achInput) - 1, &cbRead);
1476	if (VBOX_FAILURE(rc))
1477	return rc;
1478	char psz = (char )memchr(&pDbgc->achInput[0], '\n', cbRead);
1479	if (psz)
1480	{
1481	pDbgc->fInputOverflow = false;
1482	pDbgc->iRead = psz - &pDbgc->achInput[0] + 1;
1483	pDbgc->iWrite = (unsigned)cbRead;
1484	pDbgc->cInputLines = 0;
1485	break;
1486	}
1487	}
1488
1489	return 0;
1490	}
1491
1492
1493	/**
1494	* Read input and do some preprocessing.
1495	*
1496	* @returns VBox status.
1497	* In addition to the iWrite and achInput, cInputLines is maintained.
1498	* In case of an input overflow the fInputOverflow flag will be set.
1499	* @param pDbgc Debugger console instance data.
1500	*/
1501	static int dbgcInputRead(PDBGC pDbgc)
1502	{
1503	/*
1504	* We have ready input.
1505	* Read it till we don't have any or we have a full input buffer.
1506	*/
1507	int rc = 0;
1508	do
1509	{
1510	/*
1511	* More available buffer space?
1512	*/
1513	size_t cbLeft;
1514	if (pDbgc->iWrite > pDbgc->iRead)
1515	cbLeft = sizeof(pDbgc->achInput) - pDbgc->iWrite - (pDbgc->iRead == 0);
1516	else
1517	cbLeft = pDbgc->iRead - pDbgc->iWrite - 1;
1518	if (!cbLeft)
1519	{
1520	/* overflow? */
1521	if (!pDbgc->cInputLines)
1522	rc = dbgcInputOverflow(pDbgc);
1523	break;
1524	}
1525
1526	/*
1527	* Read one char and interpret it.
1528	*/
1529	char achRead[128];
1530	size_t cbRead;
1531	rc = pDbgc->pBack->pfnRead(pDbgc->pBack, &achRead[0], RT_MIN(cbLeft, sizeof(achRead)), &cbRead);
1532	if (VBOX_FAILURE(rc))
1533	return rc;
1534	char *psz = &achRead[0];
1535	while (cbRead-- > 0)
1536	{
1537	char ch = *psz++;
1538	switch (ch)
1539	{
1540	/*
1541	* Ignore.
1542	*/
1543	case '\0':
1544	case '\r':
1545	case '\a':
1546	break;
1547
1548	/*
1549	* Backspace.
1550	*/
1551	case '\b':
1552	Log2(("DBGC: backspace\n"));
1553	if (pDbgc->iRead != pDbgc->iWrite)
1554	{
1555	unsigned iWriteUndo = pDbgc->iWrite;
1556	if (pDbgc->iWrite)
1557	pDbgc->iWrite--;
1558	else
1559	pDbgc->iWrite = sizeof(pDbgc->achInput) - 1;
1560
1561	if (pDbgc->achInput[pDbgc->iWrite] == '\n')
1562	pDbgc->iWrite = iWriteUndo;
1563	}
1564	break;
1565
1566	/*
1567	* Add char to buffer.
1568	*/
1569	case '\t':
1570	case '\n':
1571	case ';':
1572	switch (ch)
1573	{
1574	case '\t': ch = ' '; break;
1575	case '\n': pDbgc->cInputLines++; break;
1576	}
1577	default:
1578	Log2(("DBGC: ch=%02x\n", (unsigned char)ch));
1579	pDbgc->achInput[pDbgc->iWrite] = ch;
1580	if (++pDbgc->iWrite >= sizeof(pDbgc->achInput))
1581	pDbgc->iWrite = 0;
1582	break;
1583	}
1584	}
1585
1586	/* Terminate it to make it easier to read in the debugger. */
1587	pDbgc->achInput[pDbgc->iWrite] = '\0';
1588	} while (pDbgc->pBack->pfnInput(pDbgc->pBack, 0));
1589
1590	return rc;
1591	}
1592
1593
1594	/**
1595	* Reads input, parses it and executes commands on '\n'.
1596	*
1597	* @returns VBox status.
1598	* @param pDbgc Debugger console instance data.
1599	* @param fNoExecute Indicates that no commands should actually be executed.
1600	*/
1601	int dbgcProcessInput(PDBGC pDbgc, bool fNoExecute)
1602	{
1603	/*
1604	* We know there's input ready, so let's read it first.
1605	*/
1606	int rc = dbgcInputRead(pDbgc);
1607	if (VBOX_FAILURE(rc))
1608	return rc;
1609
1610	/*
1611	* Now execute any ready commands.
1612	*/
1613	if (pDbgc->cInputLines)
1614	{
1615	/** @todo this fReady stuff is broken. */
1616	pDbgc->fReady = false;
1617	rc = dbgcProcessCommands(pDbgc, fNoExecute);
1618	if (VBOX_SUCCESS(rc) && rc != VWRN_DBGC_CMD_PENDING)
1619	pDbgc->fReady = true;
1620	if ( VBOX_SUCCESS(rc)
1621	&& pDbgc->iRead == pDbgc->iWrite
1622	&& pDbgc->fReady)
1623	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "VBoxDbg> ");
1624	}
1625	else
1626	/* Received nonsense; just skip it. */
1627	pDbgc->iRead = pDbgc->iWrite;
1628
1629	return rc;
1630	}
1631
1632
1633	/**
1634	* Gets the event context identifier string.
1635	* @returns Read only string.
1636	* @param enmCtx The context.
1637	*/
1638	static const char *dbgcGetEventCtx(DBGFEVENTCTX enmCtx)
1639	{
1640	switch (enmCtx)
1641	{
1642	case DBGFEVENTCTX_RAW: return "raw";
1643	case DBGFEVENTCTX_REM: return "rem";
1644	case DBGFEVENTCTX_HWACCL: return "hwaccl";
1645	case DBGFEVENTCTX_HYPER: return "hyper";
1646	case DBGFEVENTCTX_OTHER: return "other";
1647
1648	case DBGFEVENTCTX_INVALID: return "!Invalid Event Ctx!";
1649	default:
1650	AssertMsgFailed(("enmCtx=%d\n", enmCtx));
1651	return "!Unknown Event Ctx!";
1652	}
1653	}
1654
1655
1656	/**
1657	* Processes debugger events.
1658	*
1659	* @returns VBox status.
1660	* @param pDbgc DBGC Instance data.
1661	* @param pEvent Pointer to event data.
1662	*/
1663	static int dbgcProcessEvent(PDBGC pDbgc, PCDBGFEVENT pEvent)
1664	{
1665	/*
1666	* Flush log first.
1667	*/
1668	if (pDbgc->fLog)
1669	{
1670	int rc = dbgcProcessLog(pDbgc);
1671	if (VBOX_FAILURE(rc))
1672	return rc;
1673	}
1674
1675	/*
1676	* Process the event.
1677	*/
1678	pDbgc->pszScratch = &pDbgc->achInput[0];
1679	pDbgc->iArg = 0;
1680	bool fPrintPrompt = true;
1681	int rc = VINF_SUCCESS;
1682	switch (pEvent->enmType)
1683	{
1684	/*
1685	* The first part is events we have initiated with commands.
1686	*/
1687	case DBGFEVENT_HALT_DONE:
1688	{
1689	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: VM %p is halted! (%s)\n",
1690	pDbgc->pVM, dbgcGetEventCtx(pEvent->enmCtx));
1691	pDbgc->fRegCtxGuest = true; /* we're always in guest context when halted. */
1692	if (VBOX_SUCCESS(rc))
1693	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1694	break;
1695	}
1696
1697
1698	/*
1699	* The second part is events which can occur at any time.
1700	*/
1701	case DBGFEVENT_FATAL_ERROR:
1702	{
1703	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbf event: Fatal error! (%s)\n",
1704	dbgcGetEventCtx(pEvent->enmCtx));
1705	pDbgc->fRegCtxGuest = false; /* fatal errors are always in hypervisor. */
1706	if (VBOX_SUCCESS(rc))
1707	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1708	break;
1709	}
1710
1711	case DBGFEVENT_BREAKPOINT:
1712	case DBGFEVENT_BREAKPOINT_HYPER:
1713	{
1714	bool fRegCtxGuest = pDbgc->fRegCtxGuest;
1715	pDbgc->fRegCtxGuest = pEvent->enmType == DBGFEVENT_BREAKPOINT;
1716
1717	rc = dbgcBpExec(pDbgc, pEvent->u.Bp.iBp);
1718	switch (rc)
1719	{
1720	case VERR_DBGC_BP_NOT_FOUND:
1721	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Unknown breakpoint %u! (%s)\n",
1722	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
1723	break;
1724
1725	case VINF_DBGC_BP_NO_COMMAND:
1726	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! (%s)\n",
1727	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
1728	break;
1729
1730	case VINF_BUFFER_OVERFLOW:
1731	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! Command too long to execute! (%s)\n",
1732	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
1733	break;
1734
1735	default:
1736	break;
1737	}
1738	if (VBOX_SUCCESS(rc) && DBGFR3IsHalted(pDbgc->pVM))
1739	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1740	else
1741	pDbgc->fRegCtxGuest = fRegCtxGuest;
1742	break;
1743	}
1744
1745	case DBGFEVENT_STEPPED:
1746	case DBGFEVENT_STEPPED_HYPER:
1747	{
1748	pDbgc->fRegCtxGuest = pEvent->enmType == DBGFEVENT_STEPPED;
1749
1750	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Single step! (%s)\n", dbgcGetEventCtx(pEvent->enmCtx));
1751	if (VBOX_SUCCESS(rc))
1752	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1753	break;
1754	}
1755
1756	case DBGFEVENT_ASSERTION_HYPER:
1757	{
1758	pDbgc->fRegCtxGuest = false;
1759
1760	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1761	"\ndbgf event: Hypervisor Assertion! (%s)\n"
1762	"%s"
1763	"%s"
1764	"\n",
1765	dbgcGetEventCtx(pEvent->enmCtx),
1766	pEvent->u.Assert.pszMsg1,
1767	pEvent->u.Assert.pszMsg2);
1768	if (VBOX_SUCCESS(rc))
1769	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1770	break;
1771	}
1772
1773	case DBGFEVENT_DEV_STOP:
1774	{
1775	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1776	"\n"
1777	"dbgf event: DBGFSTOP (%s)\n"
1778	"File: %s\n"
1779	"Line: %d\n"
1780	"Function: %s\n",
1781	dbgcGetEventCtx(pEvent->enmCtx),
1782	pEvent->u.Src.pszFile,
1783	pEvent->u.Src.uLine,
1784	pEvent->u.Src.pszFunction);
1785	if (VBOX_SUCCESS(rc) && pEvent->u.Src.pszMessage && *pEvent->u.Src.pszMessage)
1786	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1787	"Message: %s\n",
1788	pEvent->u.Src.pszMessage);
1789	if (VBOX_SUCCESS(rc))
1790	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
1791	break;
1792	}
1793
1794
1795	case DBGFEVENT_INVALID_COMMAND:
1796	{
1797	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Invalid command event!\n");
1798	fPrintPrompt = !pDbgc->fReady;
1799	break;
1800	}
1801
1802	case DBGFEVENT_TERMINATING:
1803	{
1804	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\nVM is terminating!\n");
1805	rc = VERR_GENERAL_FAILURE;
1806	break;
1807	}
1808
1809
1810	default:
1811	{
1812	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Unknown event %d!\n", pEvent->enmType);
1813	fPrintPrompt = !pDbgc->fReady;
1814	break;
1815	}
1816	}
1817
1818	/*
1819	* Prompt, anyone?
1820	*/
1821	if (fPrintPrompt && VBOX_SUCCESS(rc))
1822	{
1823	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "VBoxDbg> ");
1824	}
1825
1826	return rc;
1827	}
1828
1829
1830	/**
1831	* Prints any log lines from the log buffer.
1832	*
1833	* The caller must not call function this unless pDbgc->fLog is set.
1834	*
1835	* @returns VBox status. (output related)
1836	* @param pDbgc Debugger console instance data.
1837	*/
1838	static int dbgcProcessLog(PDBGC pDbgc)
1839	{
1840	/** @todo */
1841	NOREF(pDbgc);
1842	return 0;
1843	}
1844
1845
1846	/**
1847	* Run the debugger console.
1848	*
1849	* @returns VBox status.
1850	* @param pDbgc Pointer to the debugger console instance data.
1851	*/
1852	int dbgcRun(PDBGC pDbgc)
1853	{
1854	/*
1855	* Main Debugger Loop.
1856	*
1857	* This loop will either block on waiting for input or on waiting on
1858	* debug events. If we're forwarding the log we cannot wait for long
1859	* before we must flush the log.
1860	*/
1861	int rc = VINF_SUCCESS;
1862	for (;;)
1863	{
1864	if (pDbgc->pVM && DBGFR3CanWait(pDbgc->pVM))
1865	{
1866	/*
1867	* Wait for a debug event.
1868	*/
1869	PCDBGFEVENT pEvent;
1870	rc = DBGFR3EventWait(pDbgc->pVM, pDbgc->fLog ? 1 : 32, &pEvent);
1871	if (VBOX_SUCCESS(rc))
1872	{
1873	rc = dbgcProcessEvent(pDbgc, pEvent);
1874	if (VBOX_FAILURE(rc))
1875	break;
1876	}
1877	else if (rc != VERR_TIMEOUT)
1878	break;
1879
1880	/*
1881	* Check for input.
1882	*/
1883	if (pDbgc->pBack->pfnInput(pDbgc->pBack, 0))
1884	{
1885	rc = dbgcProcessInput(pDbgc, false /* fNoExecute */);
1886	if (VBOX_FAILURE(rc))
1887	break;
1888	}
1889	}
1890	else
1891	{
1892	/*
1893	* Wait for input. If Logging is enabled we'll only wait very briefly.
1894	*/
1895	if (pDbgc->pBack->pfnInput(pDbgc->pBack, pDbgc->fLog ? 1 : 1000))
1896	{
1897	rc = dbgcProcessInput(pDbgc, false /* fNoExecute */);
1898	if (VBOX_FAILURE(rc))
1899	break;
1900	}
1901	}
1902
1903	/*
1904	* Forward log output.
1905	*/
1906	if (pDbgc->fLog)
1907	{
1908	rc = dbgcProcessLog(pDbgc);
1909	if (VBOX_FAILURE(rc))
1910	break;
1911	}
1912	}
1913
1914	return rc;
1915	}
1916
1917
1918	/**
1919	* Creates a a new instance.
1920	*
1921	* @returns VBox status code.
1922	* @param ppDbgc Where to store the pointer to the instance data.
1923	* @param pBack Pointer to the backend.
1924	* @param fFlags The flags.
1925	*/
1926	int dbgcCreate(PDBGC *ppDbgc, PDBGCBACK pBack, unsigned fFlags)
1927	{
1928	/*
1929	* Validate input.
1930	*/
1931	AssertPtrReturn(pBack, VERR_INVALID_POINTER);
1932	AssertMsgReturn(!fFlags, ("%#x", fFlags), VERR_INVALID_PARAMETER);
1933
1934	/*
1935	* Allocate and initialize.
1936	*/
1937	PDBGC pDbgc = (PDBGC)RTMemAllocZ(sizeof(*pDbgc));
1938	if (!pDbgc)
1939	return VERR_NO_MEMORY;
1940
1941	dbgcInitCmdHlp(pDbgc);
1942	pDbgc->pBack = pBack;
1943	pDbgc->pVM = NULL;
1944	pDbgc->pszEmulation = "CodeView/WinDbg";
1945	pDbgc->paEmulationCmds = &g_aCmdsCodeView[0];
1946	pDbgc->cEmulationCmds = g_cCmdsCodeView;
1947	//pDbgc->fLog = false;
1948	pDbgc->fRegCtxGuest = true;
1949	pDbgc->fRegTerse = true;
1950	//pDbgc->DisasmPos = {0};
1951	//pDbgc->SourcePos = {0};
1952	//pDbgc->DumpPos = {0};
1953	//pDbgc->cbDumpElement = 0;
1954	//pDbgc->cVars = 0;
1955	//pDbgc->paVars = NULL;
1956	//pDbgc->pFirstBp = NULL;
1957	//pDbgc->abSearch = {0};
1958	//pDbgc->cbSearch = 0;
1959	pDbgc->cbSearchUnit = 1;
1960	pDbgc->cMaxSearchHits = 1;
1961	//pDbgc->SearchAddr = {0};
1962	//pDbgc->cbSearchRange = 0;
1963
1964	//pDbgc->uInputZero = 0;
1965	//pDbgc->iRead = 0;
1966	//pDbgc->iWrite = 0;
1967	//pDbgc->cInputLines = 0;
1968	//pDbgc->fInputOverflow = false;
1969	pDbgc->fReady = true;
1970	pDbgc->pszScratch = &pDbgc->achScratch[0];
1971	//pDbgc->iArg = 0;
1972	//pDbgc->rcOutput = 0;
1973	//pDbgc->rcCmd = 0;
1974
1975	dbgcInitOpCharBitMap();
1976
1977	*ppDbgc = pDbgc;
1978	return VINF_SUCCESS;
1979	}
1980
1981	/**
1982	* Destroys a DBGC instance created by dbgcCreate.
1983	*
1984	* @param pDbgc Pointer to the debugger console instance data.
1985	*/
1986	void dbgcDestroy(PDBGC pDbgc)
1987	{
1988	AssertPtr(pDbgc);
1989
1990	/* Disable log hook. */
1991	if (pDbgc->fLog)
1992	{
1993
1994	}
1995
1996	/* Detach from the VM. */
1997	if (pDbgc->pVM)
1998	DBGFR3Detach(pDbgc->pVM);
1999
2000	/* finally, free the instance memory. */
2001	RTMemFree(pDbgc);
2002	}
2003
2004
2005	/**
2006	* Make a console instance.
2007	*
2008	* This will not return until either an 'exit' command is issued or a error code
2009	* indicating connection loss is encountered.
2010	*
2011	* @returns VINF_SUCCESS if console termination caused by the 'exit' command.
2012	* @returns The VBox status code causing the console termination.
2013	*
2014	* @param pVM VM Handle.
2015	* @param pBack Pointer to the backend structure. This must contain
2016	* a full set of function pointers to service the console.
2017	* @param fFlags Reserved, must be zero.
2018	* @remark A forced termination of the console is easiest done by forcing the
2019	* callbacks to return fatal failures.
2020	*/
2021	DBGDECL(int) DBGCCreate(PVM pVM, PDBGCBACK pBack, unsigned fFlags)
2022	{
2023	/*
2024	* Validate input.
2025	*/
2026	AssertPtrNullReturn(pVM, VERR_INVALID_POINTER);
2027
2028	/*
2029	* Allocate and initialize instance data
2030	*/
2031	PDBGC pDbgc;
2032	int rc = dbgcCreate(&pDbgc, pBack, fFlags);
2033	if (RT_FAILURE(rc))
2034	return rc;
2035
2036	/*
2037	* Print welcome message.
2038	*/
2039	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
2040	"Welcome to the VirtualBox Debugger!\n");
2041
2042	/*
2043	* Attach to the specified VM.
2044	*/
2045	if (RT_SUCCESS(rc) && pVM)
2046	{
2047	rc = DBGFR3Attach(pVM);
2048	if (RT_SUCCESS(rc))
2049	{
2050	pDbgc->pVM = pVM;
2051	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
2052	"Current VM is %08x\n" /** @todo get and print the VM name! */
2053	, pDbgc->pVM);
2054	}
2055	else
2056	rc = pDbgc->CmdHlp.pfnVBoxError(&pDbgc->CmdHlp, rc, "When trying to attach to VM %p\n", pDbgc->pVM);
2057	}
2058
2059	/*
2060	* Load plugins.
2061	* This is currently hardcoded simplicity.
2062	*/
2063	if (RT_SUCCESS(rc) && pVM)
2064	{
2065	static PCDBGFOSREG s_aPlugIns[] =
2066	{
2067	//&g_DBGDiggerFreeBSD,
2068	//&g_DBGDiggerLinux,
2069	//&g_DBGDiggerOS2,
2070	&g_DBGDiggerSolaris,
2071	//&g_DBGDiggerWinNt
2072	};
2073
2074	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Loading Plugins:");
2075	for (unsigned i = 0; i < RT_ELEMENTS(s_aPlugIns); i++)
2076	{
2077	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, " %s", s_aPlugIns[i]->szName);
2078	rc = DBGFR3OSRegister(pVM, s_aPlugIns[i]);
2079	if (RT_FAILURE(rc) && rc != VERR_ALREADY_LOADED)
2080	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "->%Rrc", rc);
2081	}
2082	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\n");
2083	}
2084
2085	if (RT_SUCCESS(rc))
2086	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
2087	"VBoxDbg> ");
2088
2089	/*
2090	* Run the debugger main loop.
2091	*/
2092	if (RT_SUCCESS(rc))
2093	rc = dbgcRun(pDbgc);
2094
2095	/*
2096	* Cleanup console debugger session.
2097	*/
2098	dbgcDestroy(pDbgc);
2099	return rc;
2100	}
2101

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source: vbox/trunk/src/VBox/Debugger/DBGConsole.cpp@ 12466

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