DBGConsole.cpp@ 56328

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1	/* $Id: DBGConsole.cpp 56296 2015-06-09 14:30:56Z vboxsync $ */
2	/** @file
3	* DBGC - Debugger Console.
4	*/
5
6	/*
7	* Copyright (C) 2006-2015 Oracle Corporation
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
18
19	/** @page pg_dbgc DBGC - The Debug Console
20	*
21	* The debugger console is an early attempt to make some interactive
22	* debugging facilities for the VirtualBox VMM. It was initially only
23	* accessible thru a telnet session in debug builds. Later it was hastily built
24	* into the VBoxDbg module with a very simple Qt wrapper around it.
25	*
26	* The current state is that it's by default shipped with all standard
27	* VirtualBox builds. The GUI component is by default accessible in all
28	* non-release builds, while release builds require extra data, environment or
29	* command line options to make it visible.
30	*
31	* Now, even if we ship it with all standard builds we would like it to remain
32	* an optional feature that can be omitted when building VirtualBox. Therefore,
33	* all external code interfacing DBGC need to be enclosed in
34	* \#ifdef VBOX_WITH_DEBUGGER blocks. This is mandatory for components that
35	* register external commands.
36	*
37	*
38	* @section sec_dbgc_op Operation
39	*
40	* The console will process commands in a manner similar to the OS/2 and Windows
41	* kernel debuggers. This means ';' is a command separator and that when
42	* possible we'll use the same command names as these two uses. As an
43	* alternative we intent to provide a set of gdb-like commands as well and let
44	* the user decide which should take precedence.
45	*
46	*
47	* @subsection sec_dbg_op_numbers Numbers
48	*
49	* Numbers are hexadecimal unless specified with a prefix indicating
50	* elsewise. Prefixes:
51	* - '0x' - hexadecimal.
52	* - '0n' - decimal
53	* - '0t' - octal.
54	* - '0y' - binary.
55	*
56	* Some of the prefixes are a bit uncommon, the reason for this that the
57	* typical binary prefix '0b' can also be a hexadecimal value since no prefix or
58	* suffix is required for such values. Ditto for '0n' and '0' for decimal and
59	* octal.
60	*
61	* The '`' can be used in the numeric value to separate parts as the user
62	* wishes. Generally, though the debugger may use it in output as thousand
63	* separator in decimal numbers and 32-bit separator in hex numbers.
64	*
65	* For historical reasons, a 'h' suffix is suffered on hex numbers. Unlike most
66	* assemblers, a leading 0 before a-f is not required with the 'h' suffix.
67	*
68	* The prefix '0i' can be used instead of '0n', as it was the early decimal
69	* prefix employed by DBGC. It's being deprecated and may be removed later.
70	*
71	*
72	* @subsection sec_dbg_op_strings Strings and Symbols
73	*
74	* The debugger will try to guess, convert or promote what the type of an
75	* argument to a command, function or operator based on the input description of
76	* the receiver. If the user wants to make it clear to the debugger that
77	* something is a string, put it inside double quotes. Symbols should use
78	* single quotes, though we're current still a bit flexible on this point.
79	*
80	* If you need to put a quote character inside the quoted text, you escape it by
81	* repating it once: echo "printf(""hello world"");"
82	*
83	*
84	* @subsection sec_dbg_op_address Addressing modes
85	*
86	* - Default is flat. For compatibility '%' also means flat.
87	* - Segmented addresses are specified selector:offset.
88	* - Physical addresses are specified using '%%'.
89	* - The default target for the addressing is the guest context, the '#'
90	* will override this and set it to the host.
91	* Note that several operations won't work on host addresses.
92	*
93	* The '%', '%%' and '#' prefixes is implemented as unary operators, while ':'
94	* is a binary operator. Operator precedence takes care of evaluation order.
95	*
96	*
97	* @subsection sec_dbg_op_c_operators C/C++ Operators
98	*
99	* Most unary and binary arithmetic, comparison, logical and bitwise C/C++
100	* operators are supported by the debugger, with the same precedence rules of
101	* course. There is one notable change made due to the unary '%' and '%%'
102	* operators, and that is that the modulo (remainder) operator is called 'mod'
103	* instead of '%'. This saves a lot of trouble separating argument.
104	*
105	* There are no assignment operators. Instead some simple global variable space
106	* is provided thru the 'set' and 'unset' commands and the unary '$' operator.
107	*
108	*
109	* @subsection sec_dbg_op_registers Registers
110	*
111	* All registers and their sub-fields exposed by the DBGF API are accessible via
112	* the '\@' operator. A few CPU register are accessible directly (as symbols)
113	* without using the '\@' operator. Hypervisor registers are accessible by
114	* prefixing the register name with a dot ('.').
115	*
116	*
117	* @subsection sec_dbg_op_commands Commands
118	*
119	* Commands names are case sensitive. By convention they are lower cased, starts
120	* with a letter but may contain digits and underscores afterwards. Operators
121	* are not allowed in the name (not even part of it), as we would risk
122	* misunderstanding it otherwise.
123	*
124	* Commands returns a status code.
125	*
126	* The '.' prefix indicates the set of external commands. External commands are
127	* command registered by VMM components.
128	*
129	*
130	* @subsection sec_dbg_op_functions Functions
131	*
132	* Functions are similar to commands, but return a variable and can only be used
133	* as part of an expression making up the argument of a command, function,
134	* operator or language statement (if we get around to implement that).
135	*
136	*
137	* @section sec_dbgc_logging Logging
138	*
139	* The idea is to be able to pass thru debug and release logs to the console
140	* if the user so wishes. This feature requires some kind of hook into the
141	* logger instance and while this was sketched it hasn't yet been implemented
142	* (dbgcProcessLog and DBGC::fLog).
143	*
144	* This feature has not materialized and probably never will.
145	*
146	*
147	* @section sec_dbgc_linking Linking and API
148	*
149	* The DBGC code is linked into the VBoxVMM module.
150	*
151	* IMachineDebugger may one day be extended with a DBGC interface so we can work
152	* with DBGC remotely without requiring TCP. Some questions about callbacks
153	* (for output) and security (you may wish to restrict users from debugging a
154	* VM) needs to be answered first though.
155	*/
156
157
158	/*******************************************************************************
159	* Header Files *
160	*******************************************************************************/
161	#define LOG_GROUP LOG_GROUP_DBGC
162	#include <VBox/dbg.h>
163	#include <VBox/vmm/dbgf.h>
164	#include <VBox/vmm/vmapi.h> /* VMR3GetVM() */
165	#include <VBox/vmm/hm.h> /* HMR3IsEnabled */
166	#include <VBox/err.h>
167	#include <VBox/log.h>
168
169	#include <iprt/asm.h>
170	#include <iprt/assert.h>
171	#include <iprt/mem.h>
172	#include <iprt/string.h>
173
174	#include "DBGCInternal.h"
175	#include "DBGPlugIns.h"
176
177
178	/*******************************************************************************
179	* Internal Functions *
180	*******************************************************************************/
181	static int dbgcProcessLog(PDBGC pDbgc);
182
183
184	/**
185	* Resolves a symbol (or tries to do so at least).
186	*
187	* @returns 0 on success.
188	* @returns VBox status on failure.
189	* @param pDbgc The debug console instance.
190	* @param pszSymbol The symbol name.
191	* @param enmType The result type. Specifying DBGCVAR_TYPE_GC_FAR may
192	* cause failure, avoid it.
193	* @param pResult Where to store the result.
194	*/
195	int dbgcSymbolGet(PDBGC pDbgc, const char *pszSymbol, DBGCVARTYPE enmType, PDBGCVAR pResult)
196	{
197	int rc;
198
199	/*
200	* Builtin?
201	*/
202	PCDBGCSYM pSymDesc = dbgcLookupRegisterSymbol(pDbgc, pszSymbol);
203	if (pSymDesc)
204	{
205	if (!pSymDesc->pfnGet)
206	return VERR_DBGC_PARSE_WRITEONLY_SYMBOL;
207	return pSymDesc->pfnGet(pSymDesc, &pDbgc->CmdHlp, enmType, pResult);
208	}
209
210	/*
211	* A typical register? (Guest only)
212	*/
213	static const char s_szSixLetterRegisters[] =
214	"rflags;eflags;"
215	;
216	static const char s_szThreeLetterRegisters[] =
217	"eax;rax;" "r10;" "r8d;r8w;r8b;" "cr0;" "dr0;"
218	"ebx;rbx;" "r11;" "r9d;r9w;r8b;" "dr1;"
219	"ecx;rcx;" "r12;" "cr2;" "dr2;"
220	"edx;rdx;" "r13;" "cr3;" "dr3;"
221	"edi;rdi;dil;" "r14;" "cr4;" "dr4;"
222	"esi;rsi;sil;" "r15;" "cr8;"
223	"ebp;rbp;"
224	"esp;rsp;" "dr6;"
225	"rip;eip;" "dr7;"
226	"efl;"
227	;
228	static const char s_szTwoLetterRegisters[] =
229	"ax;al;ah;" "r8;"
230	"bx;bl;bh;" "r9;"
231	"cx;cl;ch;" "cs;"
232	"dx;dl;dh;" "ds;"
233	"di;" "es;"
234	"si;" "fs;"
235	"bp;" "gs;"
236	"sp;" "ss;"
237	"ip;"
238	;
239	const char pszRegSym = pszSymbol == '.' ? pszSymbol + 1 : pszSymbol;
240	size_t const cchRegSym = strlen(pszRegSym);
241	if ( (cchRegSym == 2 && strstr(s_szTwoLetterRegisters, pszRegSym))
242	\|\| (cchRegSym == 3 && strstr(s_szThreeLetterRegisters, pszRegSym))
243	\|\| (cchRegSym == 6 && strstr(s_szSixLetterRegisters, pszRegSym)))
244	{
245	if (!strchr(pszSymbol, ';'))
246	{
247	DBGCVAR Var;
248	DBGCVAR_INIT_SYMBOL(&Var, pszSymbol);
249	rc = dbgcOpRegister(pDbgc, &Var, DBGCVAR_CAT_ANY, pResult);
250	if (RT_SUCCESS(rc))
251	return DBGCCmdHlpConvert(&pDbgc->CmdHlp, pResult, enmType, false /fConvSyms/, pResult);
252	}
253	}
254
255	/*
256	* Ask PDM.
257	*/
258	/** @todo resolve symbols using PDM. */
259
260	/*
261	* Ask the debug info manager.
262	*/
263	RTDBGSYMBOL Symbol;
264	rc = DBGFR3AsSymbolByName(pDbgc->pUVM, pDbgc->hDbgAs, pszSymbol, &Symbol, NULL);
265	if (RT_SUCCESS(rc))
266	{
267	/*
268	* Default return is a flat gc address.
269	*/
270	DBGCVAR_INIT_GC_FLAT(pResult, Symbol.Value);
271	if (Symbol.cb)
272	DBGCVAR_SET_RANGE(pResult, DBGCVAR_RANGE_BYTES, Symbol.cb);
273
274	switch (enmType)
275	{
276	/* nothing to do. */
277	case DBGCVAR_TYPE_GC_FLAT:
278	case DBGCVAR_TYPE_ANY:
279	return VINF_SUCCESS;
280
281	/* impossible at the moment. */
282	case DBGCVAR_TYPE_GC_FAR:
283	return VERR_DBGC_PARSE_CONVERSION_FAILED;
284
285	/* simply make it numeric. */
286	case DBGCVAR_TYPE_NUMBER:
287	pResult->enmType = DBGCVAR_TYPE_NUMBER;
288	pResult->u.u64Number = Symbol.Value;
289	return VINF_SUCCESS;
290
291	/* cast it. */
292	case DBGCVAR_TYPE_GC_PHYS:
293	case DBGCVAR_TYPE_HC_FLAT:
294	case DBGCVAR_TYPE_HC_PHYS:
295	return DBGCCmdHlpConvert(&pDbgc->CmdHlp, pResult, enmType, false /fConvSyms/, pResult);
296
297	default:
298	AssertMsgFailed(("Internal error enmType=%d\n", enmType));
299	return VERR_INVALID_PARAMETER;
300	}
301	}
302
303	return VERR_DBGC_PARSE_NOT_IMPLEMENTED;
304	}
305
306
307	/**
308	* Process all commands currently in the buffer.
309	*
310	* @returns VBox status code. Any error indicates the termination of the console session.
311	* @param pDbgc Debugger console instance data.
312	* @param fNoExecute Indicates that no commands should actually be executed.
313	*/
314	static int dbgcProcessCommands(PDBGC pDbgc, bool fNoExecute)
315	{
316	/** @todo Replace this with a sh/ksh/csh/rexx like toplevel language that
317	* allows doing function, loops, if, cases, and such. */
318	int rc = VINF_SUCCESS;
319	while (pDbgc->cInputLines)
320	{
321	/*
322	* Empty the log buffer if we're hooking the log.
323	*/
324	if (pDbgc->fLog)
325	{
326	rc = dbgcProcessLog(pDbgc);
327	if (RT_FAILURE(rc))
328	break;
329	}
330
331	if (pDbgc->iRead == pDbgc->iWrite)
332	{
333	AssertMsgFailed(("The input buffer is empty while cInputLines=%d!\n", pDbgc->cInputLines));
334	pDbgc->cInputLines = 0;
335	return 0;
336	}
337
338	/*
339	* Copy the command to the parse buffer.
340	*/
341	char ch;
342	char *psz = &pDbgc->achInput[pDbgc->iRead];
343	char *pszTrg = &pDbgc->achScratch[0];
344	while ((pszTrg = ch = psz++) != ';' && ch != '\n' )
345	{
346	if (psz == &pDbgc->achInput[sizeof(pDbgc->achInput)])
347	psz = &pDbgc->achInput[0];
348
349	if (psz == &pDbgc->achInput[pDbgc->iWrite])
350	{
351	AssertMsgFailed(("The buffer contains no commands while cInputLines=%d!\n", pDbgc->cInputLines));
352	pDbgc->cInputLines = 0;
353	return 0;
354	}
355
356	pszTrg++;
357	}
358	*pszTrg = '\0';
359
360	/*
361	* Advance the buffer.
362	*/
363	pDbgc->iRead = psz - &pDbgc->achInput[0];
364	if (ch == '\n')
365	pDbgc->cInputLines--;
366
367	/*
368	* Parse and execute this command.
369	*/
370	pDbgc->pszScratch = pszTrg + 1;
371	pDbgc->iArg = 0;
372	rc = dbgcEvalCommand(pDbgc, &pDbgc->achScratch[0], pszTrg - &pDbgc->achScratch[0] - 1, fNoExecute);
373	if ( rc == VERR_DBGC_QUIT
374	\|\| rc == VWRN_DBGC_CMD_PENDING)
375	break;
376	rc = VINF_SUCCESS; /* ignore other statuses */
377	}
378
379	return rc;
380	}
381
382
383	/**
384	* Handle input buffer overflow.
385	*
386	* Will read any available input looking for a '\n' to reset the buffer on.
387	*
388	* @returns VBox status.
389	* @param pDbgc Debugger console instance data.
390	*/
391	static int dbgcInputOverflow(PDBGC pDbgc)
392	{
393	/*
394	* Assert overflow status and reset the input buffer.
395	*/
396	if (!pDbgc->fInputOverflow)
397	{
398	pDbgc->fInputOverflow = true;
399	pDbgc->iRead = pDbgc->iWrite = 0;
400	pDbgc->cInputLines = 0;
401	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "Input overflow!!\n");
402	}
403
404	/*
405	* Eat input till no more or there is a '\n'.
406	* When finding a '\n' we'll continue normal processing.
407	*/
408	while (pDbgc->pBack->pfnInput(pDbgc->pBack, 0))
409	{
410	size_t cbRead;
411	int rc = pDbgc->pBack->pfnRead(pDbgc->pBack, &pDbgc->achInput[0], sizeof(pDbgc->achInput) - 1, &cbRead);
412	if (RT_FAILURE(rc))
413	return rc;
414	char psz = (char )memchr(&pDbgc->achInput[0], '\n', cbRead);
415	if (psz)
416	{
417	pDbgc->fInputOverflow = false;
418	pDbgc->iRead = psz - &pDbgc->achInput[0] + 1;
419	pDbgc->iWrite = (unsigned)cbRead;
420	pDbgc->cInputLines = 0;
421	break;
422	}
423	}
424
425	return 0;
426	}
427
428
429	/**
430	* Read input and do some preprocessing.
431	*
432	* @returns VBox status.
433	* In addition to the iWrite and achInput, cInputLines is maintained.
434	* In case of an input overflow the fInputOverflow flag will be set.
435	* @param pDbgc Debugger console instance data.
436	*/
437	static int dbgcInputRead(PDBGC pDbgc)
438	{
439	/*
440	* We have ready input.
441	* Read it till we don't have any or we have a full input buffer.
442	*/
443	int rc = 0;
444	do
445	{
446	/*
447	* More available buffer space?
448	*/
449	size_t cbLeft;
450	if (pDbgc->iWrite > pDbgc->iRead)
451	cbLeft = sizeof(pDbgc->achInput) - pDbgc->iWrite - (pDbgc->iRead == 0);
452	else
453	cbLeft = pDbgc->iRead - pDbgc->iWrite - 1;
454	if (!cbLeft)
455	{
456	/* overflow? */
457	if (!pDbgc->cInputLines)
458	rc = dbgcInputOverflow(pDbgc);
459	break;
460	}
461
462	/*
463	* Read one char and interpret it.
464	*/
465	char achRead[128];
466	size_t cbRead;
467	rc = pDbgc->pBack->pfnRead(pDbgc->pBack, &achRead[0], RT_MIN(cbLeft, sizeof(achRead)), &cbRead);
468	if (RT_FAILURE(rc))
469	return rc;
470	char *psz = &achRead[0];
471	while (cbRead-- > 0)
472	{
473	char ch = *psz++;
474	switch (ch)
475	{
476	/*
477	* Ignore.
478	*/
479	case '\0':
480	case '\r':
481	case '\a':
482	break;
483
484	/*
485	* Backspace.
486	*/
487	case '\b':
488	Log2(("DBGC: backspace\n"));
489	if (pDbgc->iRead != pDbgc->iWrite)
490	{
491	unsigned iWriteUndo = pDbgc->iWrite;
492	if (pDbgc->iWrite)
493	pDbgc->iWrite--;
494	else
495	pDbgc->iWrite = sizeof(pDbgc->achInput) - 1;
496
497	if (pDbgc->achInput[pDbgc->iWrite] == '\n')
498	pDbgc->iWrite = iWriteUndo;
499	}
500	break;
501
502	/*
503	* Add char to buffer.
504	*/
505	case '\t':
506	case '\n':
507	case ';':
508	switch (ch)
509	{
510	case '\t': ch = ' '; break;
511	case '\n': pDbgc->cInputLines++; break;
512	}
513	default:
514	Log2(("DBGC: ch=%02x\n", (unsigned char)ch));
515	pDbgc->achInput[pDbgc->iWrite] = ch;
516	if (++pDbgc->iWrite >= sizeof(pDbgc->achInput))
517	pDbgc->iWrite = 0;
518	break;
519	}
520	}
521
522	/* Terminate it to make it easier to read in the debugger. */
523	pDbgc->achInput[pDbgc->iWrite] = '\0';
524	} while (pDbgc->pBack->pfnInput(pDbgc->pBack, 0));
525
526	return rc;
527	}
528
529
530	/**
531	* Reads input, parses it and executes commands on '\n'.
532	*
533	* @returns VBox status.
534	* @param pDbgc Debugger console instance data.
535	* @param fNoExecute Indicates that no commands should actually be executed.
536	*/
537	int dbgcProcessInput(PDBGC pDbgc, bool fNoExecute)
538	{
539	/*
540	* We know there's input ready, so let's read it first.
541	*/
542	int rc = dbgcInputRead(pDbgc);
543	if (RT_FAILURE(rc))
544	return rc;
545
546	/*
547	* Now execute any ready commands.
548	*/
549	if (pDbgc->cInputLines)
550	{
551	pDbgc->pBack->pfnSetReady(pDbgc->pBack, false);
552	pDbgc->fReady = false;
553	rc = dbgcProcessCommands(pDbgc, fNoExecute);
554	if (RT_SUCCESS(rc) && rc != VWRN_DBGC_CMD_PENDING)
555	pDbgc->fReady = true;
556
557	if ( RT_SUCCESS(rc)
558	&& pDbgc->iRead == pDbgc->iWrite
559	&& pDbgc->fReady)
560	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "VBoxDbg> ");
561
562	if ( RT_SUCCESS(rc)
563	&& pDbgc->fReady)
564	pDbgc->pBack->pfnSetReady(pDbgc->pBack, true);
565	}
566	else
567	/* Received nonsense; just skip it. */
568	pDbgc->iRead = pDbgc->iWrite;
569
570	return rc;
571	}
572
573
574	/**
575	* Gets the event context identifier string.
576	* @returns Read only string.
577	* @param enmCtx The context.
578	*/
579	static const char *dbgcGetEventCtx(DBGFEVENTCTX enmCtx)
580	{
581	switch (enmCtx)
582	{
583	case DBGFEVENTCTX_RAW: return "raw";
584	case DBGFEVENTCTX_REM: return "rem";
585	case DBGFEVENTCTX_HM: return "hwaccl";
586	case DBGFEVENTCTX_HYPER: return "hyper";
587	case DBGFEVENTCTX_OTHER: return "other";
588
589	case DBGFEVENTCTX_INVALID: return "!Invalid Event Ctx!";
590	default:
591	AssertMsgFailed(("enmCtx=%d\n", enmCtx));
592	return "!Unknown Event Ctx!";
593	}
594	}
595
596
597	/**
598	* Processes debugger events.
599	*
600	* @returns VBox status.
601	* @param pDbgc DBGC Instance data.
602	* @param pEvent Pointer to event data.
603	*/
604	static int dbgcProcessEvent(PDBGC pDbgc, PCDBGFEVENT pEvent)
605	{
606	/*
607	* Flush log first.
608	*/
609	if (pDbgc->fLog)
610	{
611	int rc = dbgcProcessLog(pDbgc);
612	if (RT_FAILURE(rc))
613	return rc;
614	}
615
616	/*
617	* Process the event.
618	*/
619	pDbgc->pszScratch = &pDbgc->achInput[0];
620	pDbgc->iArg = 0;
621	bool fPrintPrompt = true;
622	int rc = VINF_SUCCESS;
623	switch (pEvent->enmType)
624	{
625	/*
626	* The first part is events we have initiated with commands.
627	*/
628	case DBGFEVENT_HALT_DONE:
629	{
630	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: VM %p is halted! (%s)\n",
631	pDbgc->pVM, dbgcGetEventCtx(pEvent->enmCtx));
632	pDbgc->fRegCtxGuest = true; /* we're always in guest context when halted. */
633	if (RT_SUCCESS(rc))
634	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
635	break;
636	}
637
638
639	/*
640	* The second part is events which can occur at any time.
641	*/
642	case DBGFEVENT_FATAL_ERROR:
643	{
644	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbf event: Fatal error! (%s)\n",
645	dbgcGetEventCtx(pEvent->enmCtx));
646	pDbgc->fRegCtxGuest = false; /* fatal errors are always in hypervisor. */
647	if (RT_SUCCESS(rc))
648	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
649	break;
650	}
651
652	case DBGFEVENT_BREAKPOINT:
653	case DBGFEVENT_BREAKPOINT_HYPER:
654	{
655	bool fRegCtxGuest = pDbgc->fRegCtxGuest;
656	pDbgc->fRegCtxGuest = pEvent->enmType == DBGFEVENT_BREAKPOINT;
657
658	rc = dbgcBpExec(pDbgc, pEvent->u.Bp.iBp);
659	switch (rc)
660	{
661	case VERR_DBGC_BP_NOT_FOUND:
662	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Unknown breakpoint %u! (%s)\n",
663	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
664	break;
665
666	case VINF_DBGC_BP_NO_COMMAND:
667	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! (%s)\n",
668	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
669	break;
670
671	case VINF_BUFFER_OVERFLOW:
672	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Breakpoint %u! Command too long to execute! (%s)\n",
673	pEvent->u.Bp.iBp, dbgcGetEventCtx(pEvent->enmCtx));
674	break;
675
676	default:
677	break;
678	}
679	if (RT_SUCCESS(rc) && DBGFR3IsHalted(pDbgc->pUVM))
680	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
681	else
682	pDbgc->fRegCtxGuest = fRegCtxGuest;
683	break;
684	}
685
686	case DBGFEVENT_STEPPED:
687	case DBGFEVENT_STEPPED_HYPER:
688	{
689	pDbgc->fRegCtxGuest = pEvent->enmType == DBGFEVENT_STEPPED;
690
691	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf event: Single step! (%s)\n", dbgcGetEventCtx(pEvent->enmCtx));
692	if (RT_SUCCESS(rc))
693	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
694	break;
695	}
696
697	case DBGFEVENT_ASSERTION_HYPER:
698	{
699	pDbgc->fRegCtxGuest = false;
700
701	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
702	"\ndbgf event: Hypervisor Assertion! (%s)\n"
703	"%s"
704	"%s"
705	"\n",
706	dbgcGetEventCtx(pEvent->enmCtx),
707	pEvent->u.Assert.pszMsg1,
708	pEvent->u.Assert.pszMsg2);
709	if (RT_SUCCESS(rc))
710	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
711	break;
712	}
713
714	case DBGFEVENT_DEV_STOP:
715	{
716	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
717	"\n"
718	"dbgf event: DBGFSTOP (%s)\n"
719	"File: %s\n"
720	"Line: %d\n"
721	"Function: %s\n",
722	dbgcGetEventCtx(pEvent->enmCtx),
723	pEvent->u.Src.pszFile,
724	pEvent->u.Src.uLine,
725	pEvent->u.Src.pszFunction);
726	if (RT_SUCCESS(rc) && pEvent->u.Src.pszMessage && *pEvent->u.Src.pszMessage)
727	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
728	"Message: %s\n",
729	pEvent->u.Src.pszMessage);
730	if (RT_SUCCESS(rc))
731	rc = pDbgc->CmdHlp.pfnExec(&pDbgc->CmdHlp, "r");
732	break;
733	}
734
735
736	case DBGFEVENT_INVALID_COMMAND:
737	{
738	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Invalid command event!\n");
739	break;
740	}
741
742	case DBGFEVENT_POWERING_OFF:
743	{
744	pDbgc->fReady = false;
745	pDbgc->pBack->pfnSetReady(pDbgc->pBack, false);
746	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\nVM is powering off!\n");
747	fPrintPrompt = false;
748	rc = VERR_GENERAL_FAILURE;
749	break;
750	}
751
752
753	default:
754	{
755	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\ndbgf/dbgc error: Unknown event %d!\n", pEvent->enmType);
756	break;
757	}
758	}
759
760	/*
761	* Prompt, anyone?
762	*/
763	if (fPrintPrompt && RT_SUCCESS(rc))
764	{
765	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "VBoxDbg> ");
766	pDbgc->fReady = true;
767	if (RT_SUCCESS(rc))
768	pDbgc->pBack->pfnSetReady(pDbgc->pBack, true);
769	}
770
771	return rc;
772	}
773
774
775	/**
776	* Prints any log lines from the log buffer.
777	*
778	* The caller must not call function this unless pDbgc->fLog is set.
779	*
780	* @returns VBox status. (output related)
781	* @param pDbgc Debugger console instance data.
782	*/
783	static int dbgcProcessLog(PDBGC pDbgc)
784	{
785	/** @todo */
786	NOREF(pDbgc);
787	return 0;
788	}
789
790	/** @callback_method_impl{FNRTDBGCFGLOG} */
791	static DECLCALLBACK(void) dbgcDbgCfgLogCallback(RTDBGCFG hDbgCfg, uint32_t iLevel, const char pszMsg, void pvUser)
792	{
793	/** @todo Add symbol noise setting. */
794	NOREF(hDbgCfg); NOREF(iLevel);
795	PDBGC pDbgc = (PDBGC)pvUser;
796	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "%s", pszMsg);
797	}
798
799
800	/**
801	* Run the debugger console.
802	*
803	* @returns VBox status.
804	* @param pDbgc Pointer to the debugger console instance data.
805	*/
806	int dbgcRun(PDBGC pDbgc)
807	{
808	/*
809	* We're ready for commands now.
810	*/
811	pDbgc->fReady = true;
812	pDbgc->pBack->pfnSetReady(pDbgc->pBack, true);
813
814	/*
815	* Main Debugger Loop.
816	*
817	* This loop will either block on waiting for input or on waiting on
818	* debug events. If we're forwarding the log we cannot wait for long
819	* before we must flush the log.
820	*/
821	int rc;
822	for (;;)
823	{
824	rc = VERR_SEM_OUT_OF_TURN;
825	if (pDbgc->pUVM)
826	rc = DBGFR3QueryWaitable(pDbgc->pUVM);
827
828	if (RT_SUCCESS(rc))
829	{
830	/*
831	* Wait for a debug event.
832	*/
833	PCDBGFEVENT pEvent;
834	rc = DBGFR3EventWait(pDbgc->pUVM, pDbgc->fLog ? 1 : 32, &pEvent);
835	if (RT_SUCCESS(rc))
836	{
837	rc = dbgcProcessEvent(pDbgc, pEvent);
838	if (RT_FAILURE(rc))
839	break;
840	}
841	else if (rc != VERR_TIMEOUT)
842	break;
843
844	/*
845	* Check for input.
846	*/
847	if (pDbgc->pBack->pfnInput(pDbgc->pBack, 0))
848	{
849	rc = dbgcProcessInput(pDbgc, false /* fNoExecute */);
850	if (RT_FAILURE(rc))
851	break;
852	}
853	}
854	else if (rc == VERR_SEM_OUT_OF_TURN)
855	{
856	/*
857	* Wait for input. If Logging is enabled we'll only wait very briefly.
858	*/
859	if (pDbgc->pBack->pfnInput(pDbgc->pBack, pDbgc->fLog ? 1 : 1000))
860	{
861	rc = dbgcProcessInput(pDbgc, false /* fNoExecute */);
862	if (RT_FAILURE(rc))
863	break;
864	}
865	}
866	else
867	break;
868
869	/*
870	* Forward log output.
871	*/
872	if (pDbgc->fLog)
873	{
874	rc = dbgcProcessLog(pDbgc);
875	if (RT_FAILURE(rc))
876	break;
877	}
878	}
879
880	return rc;
881	}
882
883
884	/**
885	* Creates a a new instance.
886	*
887	* @returns VBox status code.
888	* @param ppDbgc Where to store the pointer to the instance data.
889	* @param pBack Pointer to the backend.
890	* @param fFlags The flags.
891	*/
892	int dbgcCreate(PDBGC *ppDbgc, PDBGCBACK pBack, unsigned fFlags)
893	{
894	/*
895	* Validate input.
896	*/
897	AssertPtrReturn(pBack, VERR_INVALID_POINTER);
898	AssertMsgReturn(!fFlags, ("%#x", fFlags), VERR_INVALID_PARAMETER);
899
900	/*
901	* Allocate and initialize.
902	*/
903	PDBGC pDbgc = (PDBGC)RTMemAllocZ(sizeof(*pDbgc));
904	if (!pDbgc)
905	return VERR_NO_MEMORY;
906
907	dbgcInitCmdHlp(pDbgc);
908	pDbgc->pBack = pBack;
909	pDbgc->pVM = NULL;
910	pDbgc->pUVM = NULL;
911	pDbgc->idCpu = 0;
912	pDbgc->hDbgAs = DBGF_AS_GLOBAL;
913	pDbgc->pszEmulation = "CodeView/WinDbg";
914	pDbgc->paEmulationCmds = &g_aCmdsCodeView[0];
915	pDbgc->cEmulationCmds = g_cCmdsCodeView;
916	pDbgc->paEmulationFuncs = &g_aFuncsCodeView[0];
917	pDbgc->cEmulationFuncs = g_cFuncsCodeView;
918	//pDbgc->fLog = false;
919	pDbgc->fRegCtxGuest = true;
920	pDbgc->fRegTerse = true;
921	//pDbgc->cPagingHierarchyDumps = 0;
922	//pDbgc->DisasmPos = {0};
923	//pDbgc->SourcePos = {0};
924	//pDbgc->DumpPos = {0};
925	pDbgc->pLastPos = &pDbgc->DisasmPos;
926	//pDbgc->cbDumpElement = 0;
927	//pDbgc->cVars = 0;
928	//pDbgc->paVars = NULL;
929	//pDbgc->pPlugInHead = NULL;
930	//pDbgc->pFirstBp = NULL;
931	//pDbgc->abSearch = {0};
932	//pDbgc->cbSearch = 0;
933	pDbgc->cbSearchUnit = 1;
934	pDbgc->cMaxSearchHits = 1;
935	//pDbgc->SearchAddr = {0};
936	//pDbgc->cbSearchRange = 0;
937
938	//pDbgc->uInputZero = 0;
939	//pDbgc->iRead = 0;
940	//pDbgc->iWrite = 0;
941	//pDbgc->cInputLines = 0;
942	//pDbgc->fInputOverflow = false;
943	pDbgc->fReady = true;
944	pDbgc->pszScratch = &pDbgc->achScratch[0];
945	//pDbgc->iArg = 0;
946	//pDbgc->rcOutput = 0;
947	//pDbgc->rcCmd = 0;
948
949	dbgcEvalInit();
950
951	*ppDbgc = pDbgc;
952	return VINF_SUCCESS;
953	}
954
955	/**
956	* Destroys a DBGC instance created by dbgcCreate.
957	*
958	* @param pDbgc Pointer to the debugger console instance data.
959	*/
960	void dbgcDestroy(PDBGC pDbgc)
961	{
962	AssertPtr(pDbgc);
963
964	/* Disable log hook. */
965	if (pDbgc->fLog)
966	{
967
968	}
969
970	/* Detach from the VM. */
971	if (pDbgc->pUVM)
972	DBGFR3Detach(pDbgc->pUVM);
973
974	/* finally, free the instance memory. */
975	RTMemFree(pDbgc);
976	}
977
978
979	/**
980	* Make a console instance.
981	*
982	* This will not return until either an 'exit' command is issued or a error code
983	* indicating connection loss is encountered.
984	*
985	* @returns VINF_SUCCESS if console termination caused by the 'exit' command.
986	* @returns The VBox status code causing the console termination.
987	*
988	* @param pUVM The user mode VM handle.
989	* @param pBack Pointer to the backend structure. This must contain
990	* a full set of function pointers to service the console.
991	* @param fFlags Reserved, must be zero.
992	* @remark A forced termination of the console is easiest done by forcing the
993	* callbacks to return fatal failures.
994	*/
995	DBGDECL(int) DBGCCreate(PUVM pUVM, PDBGCBACK pBack, unsigned fFlags)
996	{
997	/*
998	* Validate input.
999	*/
1000	AssertPtrNullReturn(pUVM, VERR_INVALID_VM_HANDLE);
1001	PVM pVM = NULL;
1002	if (pUVM)
1003	{
1004	pVM = VMR3GetVM(pUVM);
1005	AssertPtrReturn(pVM, VERR_INVALID_VM_HANDLE);
1006	}
1007
1008	/*
1009	* Allocate and initialize instance data
1010	*/
1011	PDBGC pDbgc;
1012	int rc = dbgcCreate(&pDbgc, pBack, fFlags);
1013	if (RT_FAILURE(rc))
1014	return rc;
1015	if (!HMR3IsEnabled(pUVM))
1016	pDbgc->hDbgAs = DBGF_AS_RC_AND_GC_GLOBAL;
1017
1018	/*
1019	* Print welcome message.
1020	*/
1021	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1022	"Welcome to the VirtualBox Debugger!\n");
1023
1024	/*
1025	* Attach to the specified VM.
1026	*/
1027	if (RT_SUCCESS(rc) && pUVM)
1028	{
1029	rc = DBGFR3Attach(pUVM);
1030	if (RT_SUCCESS(rc))
1031	{
1032	pDbgc->pVM = pVM;
1033	pDbgc->pUVM = pUVM;
1034	pDbgc->idCpu = 0;
1035	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL,
1036	"Current VM is %08x, CPU #%u\n" /** @todo get and print the VM name! */
1037	, pDbgc->pVM, pDbgc->idCpu);
1038	}
1039	else
1040	rc = pDbgc->CmdHlp.pfnVBoxError(&pDbgc->CmdHlp, rc, "When trying to attach to VM %p\n", pDbgc->pVM);
1041	}
1042
1043	/*
1044	* Load plugins.
1045	*/
1046	if (RT_SUCCESS(rc))
1047	{
1048	if (pVM)
1049	DBGFR3PlugInLoadAll(pDbgc->pUVM);
1050	rc = pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "VBoxDbg> ");
1051	if (RT_SUCCESS(rc))
1052	{
1053	/*
1054	* Set debug config log callback.
1055	*/
1056	RTDBGCFG hDbgCfg = DBGFR3AsGetConfig(pUVM);
1057	if ( hDbgCfg != NIL_RTDBGCFG
1058	&& RTDbgCfgRetain(hDbgCfg) != UINT32_MAX)
1059	{
1060	int rc2 = RTDbgCfgSetLogCallback(hDbgCfg, dbgcDbgCfgLogCallback, pDbgc);
1061	if (RT_FAILURE(rc2))
1062	{
1063	hDbgCfg = NIL_RTDBGCFG;
1064	RTDbgCfgRelease(hDbgCfg);
1065	}
1066	}
1067	else
1068	hDbgCfg = NIL_RTDBGCFG;
1069
1070
1071	/*
1072	* Run the debugger main loop.
1073	*/
1074	rc = dbgcRun(pDbgc);
1075
1076
1077	/*
1078	* Remove debug config log callback.
1079	*/
1080	if (hDbgCfg != NIL_RTDBGCFG)
1081	{
1082	RTDbgCfgSetLogCallback(hDbgCfg, NULL, NULL);
1083	RTDbgCfgRelease(hDbgCfg);
1084	}
1085	}
1086	}
1087	else
1088	pDbgc->CmdHlp.pfnPrintf(&pDbgc->CmdHlp, NULL, "\nDBGCCreate error: %Rrc\n", rc);
1089
1090
1091	/*
1092	* Cleanup console debugger session.
1093	*/
1094	dbgcDestroy(pDbgc);
1095	return rc == VERR_DBGC_QUIT ? VINF_SUCCESS : rc;
1096	}
1097

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source: vbox/trunk/src/VBox/Debugger/DBGConsole.cpp@ 56328

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