DBGFAddrSpace.cpp@ 31082

Last change on this file since 31082 was 30257, checked in by vboxsync, 15 years ago
2x use AssertCompileNS.
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1	/* $Id: DBGFAddrSpace.cpp 30257 2010-06-16 16:17:08Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Address Space Management.
4	*/
5
6	/*
7	* Copyright (C) 2008 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_dbgf_addr_space DBGFAddrSpace - Address Space Management
20	*
21	* What's an address space? It's mainly a convenient way of stuffing
22	* module segments and ad-hoc symbols together. It will also help out
23	* when the debugger gets extended to deal with user processes later.
24	*
25	* There are two standard address spaces that will always be present:
26	* - The physical address space.
27	* - The global virtual address space.
28	*
29	* Additional address spaces will be added and removed at runtime for
30	* guest processes. The global virtual address space will be used to
31	* track the kernel parts of the OS, or at least the bits of the kernel
32	* that is part of all address spaces (mac os x and 4G/4G patched linux).
33	*
34	*/
35
36	/*******************************************************************************
37	* Header Files *
38	*******************************************************************************/
39	#define LOG_GROUP LOG_GROUP_DBGF
40	#include <VBox/dbgf.h>
41	#include <VBox/pdmapi.h>
42	#include <VBox/mm.h>
43	#include "DBGFInternal.h"
44	#include <VBox/vm.h>
45	#include <VBox/err.h>
46	#include <VBox/log.h>
47
48	#include <iprt/asm.h>
49	#include <iprt/assert.h>
50	#include <iprt/ctype.h>
51	#include <iprt/env.h>
52	#include <iprt/path.h>
53	#include <iprt/param.h>
54
55
56	/*******************************************************************************
57	* Structures and Typedefs *
58	*******************************************************************************/
59	/**
60	* Address space database node.
61	*/
62	typedef struct DBGFASDBNODE
63	{
64	/** The node core for DBGF::AsHandleTree, the key is the address space handle. */
65	AVLPVNODECORE HandleCore;
66	/** The node core for DBGF::AsPidTree, the key is the process id. */
67	AVLU32NODECORE PidCore;
68	/** The node core for DBGF::AsNameSpace, the string is the address space name. */
69	RTSTRSPACECORE NameCore;
70
71	} DBGFASDBNODE;
72	/** Pointer to an address space database node. */
73	typedef DBGFASDBNODE *PDBGFASDBNODE;
74
75
76	/**
77	* For dbgfR3AsLoadImageOpenData and dbgfR3AsLoadMapOpenData.
78	*/
79	typedef struct DBGFR3ASLOADOPENDATA
80	{
81	const char *pszModName;
82	RTGCUINTPTR uSubtrahend;
83	uint32_t fFlags;
84	RTDBGMOD hMod;
85	} DBGFR3ASLOADOPENDATA;
86
87	/**
88	* Callback for dbgfR3AsSearchPath and dbgfR3AsSearchEnvPath.
89	*
90	* @returns VBox status code. If success, then the search is completed.
91	* @param pszFilename The file name under evaluation.
92	* @param pvUser The user argument.
93	*/
94	typedef int FNDBGFR3ASSEARCHOPEN(const char pszFilename, void pvUser);
95	/** Pointer to a FNDBGFR3ASSEARCHOPEN. */
96	typedef FNDBGFR3ASSEARCHOPEN *PFNDBGFR3ASSEARCHOPEN;
97
98
99	/*******************************************************************************
100	* Defined Constants And Macros *
101	*******************************************************************************/
102	/** Locks the address space database for writing. */
103	#define DBGF_AS_DB_LOCK_WRITE(pVM) \
104	do { \
105	int rcSem = RTSemRWRequestWrite((pVM)->dbgf.s.hAsDbLock, RT_INDEFINITE_WAIT); \
106	AssertRC(rcSem); \
107	} while (0)
108
109	/** Unlocks the address space database after writing. */
110	#define DBGF_AS_DB_UNLOCK_WRITE(pVM) \
111	do { \
112	int rcSem = RTSemRWReleaseWrite((pVM)->dbgf.s.hAsDbLock); \
113	AssertRC(rcSem); \
114	} while (0)
115
116	/** Locks the address space database for reading. */
117	#define DBGF_AS_DB_LOCK_READ(pVM) \
118	do { \
119	int rcSem = RTSemRWRequestRead((pVM)->dbgf.s.hAsDbLock, RT_INDEFINITE_WAIT); \
120	AssertRC(rcSem); \
121	} while (0)
122
123	/** Unlocks the address space database after reading. */
124	#define DBGF_AS_DB_UNLOCK_READ(pVM) \
125	do { \
126	int rcSem = RTSemRWReleaseRead((pVM)->dbgf.s.hAsDbLock); \
127	AssertRC(rcSem); \
128	} while (0)
129
130
131
132	/**
133	* Initializes the address space parts of DBGF.
134	*
135	* @returns VBox status code.
136	* @param pVM The VM handle.
137	*/
138	int dbgfR3AsInit(PVM pVM)
139	{
140	/*
141	* Create the semaphore.
142	*/
143	int rc = RTSemRWCreate(&pVM->dbgf.s.hAsDbLock);
144	AssertRCReturn(rc, rc);
145
146	/*
147	* Create the standard address spaces.
148	*/
149	RTDBGAS hDbgAs;
150	rc = RTDbgAsCreate(&hDbgAs, 0, RTGCPTR_MAX, "Global");
151	AssertRCReturn(rc, rc);
152	rc = DBGFR3AsAdd(pVM, hDbgAs, NIL_RTPROCESS);
153	AssertRCReturn(rc, rc);
154	RTDbgAsRetain(hDbgAs);
155	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_GLOBAL)] = hDbgAs;
156
157	RTDbgAsRetain(hDbgAs);
158	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_KERNEL)] = hDbgAs;
159
160	rc = RTDbgAsCreate(&hDbgAs, 0, RTGCPHYS_MAX, "Physical");
161	AssertRCReturn(rc, rc);
162	rc = DBGFR3AsAdd(pVM, hDbgAs, NIL_RTPROCESS);
163	AssertRCReturn(rc, rc);
164	RTDbgAsRetain(hDbgAs);
165	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_PHYS)] = hDbgAs;
166
167	rc = RTDbgAsCreate(&hDbgAs, 0, RTRCPTR_MAX, "HyperRawMode");
168	AssertRCReturn(rc, rc);
169	rc = DBGFR3AsAdd(pVM, hDbgAs, NIL_RTPROCESS);
170	AssertRCReturn(rc, rc);
171	RTDbgAsRetain(hDbgAs);
172	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_RC)] = hDbgAs;
173	RTDbgAsRetain(hDbgAs);
174	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_RC_AND_GC_GLOBAL)] = hDbgAs;
175
176	rc = RTDbgAsCreate(&hDbgAs, 0, RTR0PTR_MAX, "HyperRing0");
177	AssertRCReturn(rc, rc);
178	rc = DBGFR3AsAdd(pVM, hDbgAs, NIL_RTPROCESS);
179	AssertRCReturn(rc, rc);
180	RTDbgAsRetain(hDbgAs);
181	pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(DBGF_AS_R0)] = hDbgAs;
182
183	return VINF_SUCCESS;
184	}
185
186
187	/**
188	* Callback used by dbgfR3AsTerm / RTAvlPVDestroy to release an address space.
189	*
190	* @returns 0.
191	* @param pNode The address space database node.
192	* @param pvIgnore NULL.
193	*/
194	static DECLCALLBACK(int) dbgfR3AsTermDestroyNode(PAVLPVNODECORE pNode, void *pvIgnore)
195	{
196	PDBGFASDBNODE pDbNode = (PDBGFASDBNODE)pNode;
197	RTDbgAsRelease((RTDBGAS)pDbNode->HandleCore.Key);
198	pDbNode->HandleCore.Key = NIL_RTDBGAS;
199	/* Don't bother freeing it here as MM will free it soon and MM is much at
200	it when doing it wholesale instead of piecemeal. */
201	NOREF(pvIgnore);
202	return 0;
203	}
204
205
206	/**
207	* Terminates the address space parts of DBGF.
208	*
209	* @param pVM The VM handle.
210	*/
211	void dbgfR3AsTerm(PVM pVM)
212	{
213	/*
214	* Create the semaphore.
215	*/
216	int rc = RTSemRWDestroy(pVM->dbgf.s.hAsDbLock);
217	AssertRC(rc);
218	pVM->dbgf.s.hAsDbLock = NIL_RTSEMRW;
219
220	/*
221	* Release all the address spaces.
222	*/
223	RTAvlPVDestroy(&pVM->dbgf.s.AsHandleTree, dbgfR3AsTermDestroyNode, NULL);
224	for (size_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.ahAsAliases); i++)
225	{
226	RTDbgAsRelease(pVM->dbgf.s.ahAsAliases[i]);
227	pVM->dbgf.s.ahAsAliases[i] = NIL_RTDBGAS;
228	}
229	}
230
231
232	/**
233	* Relocates the RC address space.
234	*
235	* @param pVM The VM handle.
236	* @param offDelta The relocation delta.
237	*/
238	void dbgfR3AsRelocate(PVM pVM, RTGCUINTPTR offDelta)
239	{
240	/** @todo */
241	}
242
243
244	/**
245	* Adds the address space to the database.
246	*
247	* @returns VBox status code.
248	* @param pVM The VM handle.
249	* @param hDbgAs The address space handle. The reference of the
250	* caller will NOT be consumed.
251	* @param ProcId The process id or NIL_RTPROCESS.
252	*/
253	VMMR3DECL(int) DBGFR3AsAdd(PVM pVM, RTDBGAS hDbgAs, RTPROCESS ProcId)
254	{
255	/*
256	* Input validation.
257	*/
258	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
259	const char *pszName = RTDbgAsName(hDbgAs);
260	if (!pszName)
261	return VERR_INVALID_HANDLE;
262	uint32_t cRefs = RTDbgAsRetain(hDbgAs);
263	if (cRefs == UINT32_MAX)
264	return VERR_INVALID_HANDLE;
265
266	/*
267	* Allocate a tracking node.
268	*/
269	int rc = VERR_NO_MEMORY;
270	PDBGFASDBNODE pDbNode = (PDBGFASDBNODE)MMR3HeapAlloc(pVM, MM_TAG_DBGF_AS, sizeof(*pDbNode));
271	if (pDbNode)
272	{
273	pDbNode->HandleCore.Key = hDbgAs;
274	pDbNode->PidCore.Key = NIL_RTPROCESS;
275	pDbNode->NameCore.pszString = pszName;
276	pDbNode->NameCore.cchString = strlen(pszName);
277	DBGF_AS_DB_LOCK_WRITE(pVM);
278	if (RTStrSpaceInsert(&pVM->dbgf.s.AsNameSpace, &pDbNode->NameCore))
279	{
280	if (RTAvlPVInsert(&pVM->dbgf.s.AsHandleTree, &pDbNode->HandleCore))
281	{
282	DBGF_AS_DB_UNLOCK_WRITE(pVM);
283	return VINF_SUCCESS;
284	}
285
286	/* bail out */
287	RTStrSpaceRemove(&pVM->dbgf.s.AsNameSpace, pszName);
288	}
289	DBGF_AS_DB_UNLOCK_WRITE(pVM);
290	MMR3HeapFree(pDbNode);
291	}
292	RTDbgAsRelease(hDbgAs);
293	return rc;
294	}
295
296
297	/**
298	* Delete an address space from the database.
299	*
300	* The address space must not be engaged as any of the standard aliases.
301	*
302	* @returns VBox status code.
303	* @retval VERR_SHARING_VIOLATION if in use as an alias.
304	* @retval VERR_NOT_FOUND if not found in the address space database.
305	*
306	* @param pVM The VM handle.
307	* @param hDbgAs The address space handle. Aliases are not allowed.
308	*/
309	VMMR3DECL(int) DBGFR3AsDelete(PVM pVM, RTDBGAS hDbgAs)
310	{
311	/*
312	* Input validation. Retain the address space so it can be released outside
313	* the lock as well as validated.
314	*/
315	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
316	if (hDbgAs == NIL_RTDBGAS)
317	return VINF_SUCCESS;
318	uint32_t cRefs = RTDbgAsRetain(hDbgAs);
319	if (cRefs == UINT32_MAX)
320	return VERR_INVALID_HANDLE;
321	RTDbgAsRelease(hDbgAs);
322
323	DBGF_AS_DB_LOCK_WRITE(pVM);
324
325	/*
326	* You cannot delete any of the aliases.
327	*/
328	for (size_t i = 0; i < RT_ELEMENTS(pVM->dbgf.s.ahAsAliases); i++)
329	if (pVM->dbgf.s.ahAsAliases[i] == hDbgAs)
330	{
331	DBGF_AS_DB_UNLOCK_WRITE(pVM);
332	return VERR_SHARING_VIOLATION;
333	}
334
335	/*
336	* Ok, try remove it from the database.
337	*/
338	PDBGFASDBNODE pDbNode = (PDBGFASDBNODE)RTAvlPVRemove(&pVM->dbgf.s.AsHandleTree, hDbgAs);
339	if (!pDbNode)
340	{
341	DBGF_AS_DB_UNLOCK_WRITE(pVM);
342	return VERR_NOT_FOUND;
343	}
344	RTStrSpaceRemove(&pVM->dbgf.s.AsNameSpace, pDbNode->NameCore.pszString);
345	if (pDbNode->PidCore.Key != NIL_RTPROCESS)
346	RTAvlU32Remove(&pVM->dbgf.s.AsPidTree, pDbNode->PidCore.Key);
347
348	DBGF_AS_DB_UNLOCK_WRITE(pVM);
349
350	/*
351	* Free the resources.
352	*/
353	RTDbgAsRelease(hDbgAs);
354	MMR3HeapFree(pDbNode);
355
356	return VINF_SUCCESS;
357	}
358
359
360	/**
361	* Changes an alias to point to a new address space.
362	*
363	* Not all the aliases can be changed, currently it's only DBGF_AS_GLOBAL
364	* and DBGF_AS_KERNEL.
365	*
366	* @returns VBox status code.
367	* @param pVM The VM handle.
368	* @param hAlias The alias to change.
369	* @param hAliasFor The address space hAlias should be an alias for.
370	* This can be an alias. The caller's reference to
371	* this address space will NOT be consumed.
372	*/
373	VMMR3DECL(int) DBGFR3AsSetAlias(PVM pVM, RTDBGAS hAlias, RTDBGAS hAliasFor)
374	{
375	/*
376	* Input validation.
377	*/
378	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
379	AssertMsgReturn(DBGF_AS_IS_ALIAS(hAlias), ("%p\n", hAlias), VERR_INVALID_PARAMETER);
380	AssertMsgReturn(!DBGF_AS_IS_FIXED_ALIAS(hAlias), ("%p\n", hAlias), VERR_INVALID_PARAMETER);
381	RTDBGAS hRealAliasFor = DBGFR3AsResolveAndRetain(pVM, hAlias);
382	if (hRealAliasFor == NIL_RTDBGAS)
383	return VERR_INVALID_HANDLE;
384
385	/*
386	* Make sure the handle has is already in the database.
387	*/
388	int rc = VERR_NOT_FOUND;
389	DBGF_AS_DB_LOCK_WRITE(pVM);
390	if (RTAvlPVGet(&pVM->dbgf.s.AsHandleTree, hRealAliasFor))
391	{
392	/*
393	* Update the alias table and release the current address space.
394	*/
395	RTDBGAS hAsOld;
396	ASMAtomicXchgHandle(&pVM->dbgf.s.ahAsAliases[DBGF_AS_ALIAS_2_INDEX(hAlias)], hRealAliasFor, &hAsOld);
397	uint32_t cRefs = RTDbgAsRelease(hAsOld);
398	Assert(cRefs > 0);
399	Assert(cRefs != UINT32_MAX);
400	rc = VINF_SUCCESS;
401	}
402	DBGF_AS_DB_UNLOCK_WRITE(pVM);
403
404	return rc;
405	}
406
407
408	/**
409	* @callback_method_impl{FNPDMR3ENUM}
410	*/
411	static DECLCALLBACK(int) dbgfR3AsLazyPopulateR0Callback(PVM pVM, const char pszFilename, const char pszName,
412	RTUINTPTR ImageBase, size_t cbImage, bool fRC, void *pvArg)
413	{
414	/* Only ring-0 modules. */
415	if (!fRC)
416	{
417	RTDBGMOD hDbgMod;
418	int rc = RTDbgModCreateFromImage(&hDbgMod, pszFilename, pszName, 0 /fFlags/);
419	if (RT_SUCCESS(rc))
420	{
421	rc = RTDbgAsModuleLink((RTDBGAS)pvArg, hDbgMod, ImageBase, 0 /fFlags/);
422	if (RT_FAILURE(rc))
423	LogRel(("DBGF: Failed to link module \"%s\" into DBGF_AS_R0 at %RTptr: %Rrc\n",
424	pszName, ImageBase, rc));
425	}
426	else
427	LogRel(("DBGF: RTDbgModCreateFromImage failed with rc=%Rrc for module \"%s\" (%s)\n",
428	rc, pszName, pszFilename));
429	}
430	return VINF_SUCCESS;
431	}
432
433
434	/**
435	* Lazily populates the specified address space.
436	*
437	* @param pVM The VM handle.
438	* @param hAlias The alias.
439	*/
440	static void dbgfR3AsLazyPopulate(PVM pVM, RTDBGAS hAlias)
441	{
442	DBGF_AS_DB_LOCK_WRITE(pVM);
443	uintptr_t iAlias = DBGF_AS_ALIAS_2_INDEX(hAlias);
444	if (!pVM->dbgf.s.afAsAliasPopuplated[iAlias])
445	{
446	RTDBGAS hAs = pVM->dbgf.s.ahAsAliases[iAlias];
447	if (hAlias == DBGF_AS_R0)
448	PDMR3LdrEnumModules(pVM, dbgfR3AsLazyPopulateR0Callback, hAs);
449	/** @todo what do we do about DBGF_AS_RC? */
450
451	pVM->dbgf.s.afAsAliasPopuplated[iAlias] = true;
452	}
453	DBGF_AS_DB_UNLOCK_WRITE(pVM);
454	}
455
456
457	/**
458	* Resolves the address space handle into a real handle if it's an alias.
459	*
460	* @returns Real address space handle. NIL_RTDBGAS if invalid handle.
461	*
462	* @param pVM The VM handle.
463	* @param hAlias The possibly address space alias.
464	*
465	* @remarks Doesn't take any locks.
466	*/
467	VMMR3DECL(RTDBGAS) DBGFR3AsResolve(PVM pVM, RTDBGAS hAlias)
468	{
469	VM_ASSERT_VALID_EXT_RETURN(pVM, NULL);
470	AssertCompileNS(NIL_RTDBGAS == (RTDBGAS)0);
471
472	uintptr_t iAlias = DBGF_AS_ALIAS_2_INDEX(hAlias);
473	if (iAlias < DBGF_AS_COUNT)
474	ASMAtomicReadHandle(&pVM->dbgf.s.ahAsAliases[iAlias], &hAlias);
475	return hAlias;
476	}
477
478
479	/**
480	* Resolves the address space handle into a real handle if it's an alias,
481	* and retains whatever it is.
482	*
483	* @returns Real address space handle. NIL_RTDBGAS if invalid handle.
484	*
485	* @param pVM The VM handle.
486	* @param hAlias The possibly address space alias.
487	*/
488	VMMR3DECL(RTDBGAS) DBGFR3AsResolveAndRetain(PVM pVM, RTDBGAS hAlias)
489	{
490	VM_ASSERT_VALID_EXT_RETURN(pVM, NULL);
491	AssertCompileNS(NIL_RTDBGAS == (RTDBGAS)0);
492
493	uint32_t cRefs;
494	uintptr_t iAlias = DBGF_AS_ALIAS_2_INDEX(hAlias);
495	if (iAlias < DBGF_AS_COUNT)
496	{
497	if (DBGF_AS_IS_FIXED_ALIAS(hAlias))
498	{
499	/* Perform lazy address space population. */
500	if (!pVM->dbgf.s.afAsAliasPopuplated[iAlias])
501	dbgfR3AsLazyPopulate(pVM, hAlias);
502
503	/* Won't ever change, no need to grab the lock. */
504	hAlias = pVM->dbgf.s.ahAsAliases[iAlias];
505	cRefs = RTDbgAsRetain(hAlias);
506	}
507	else
508	{
509	/* May change, grab the lock so we can read it safely. */
510	DBGF_AS_DB_LOCK_READ(pVM);
511	hAlias = pVM->dbgf.s.ahAsAliases[iAlias];
512	cRefs = RTDbgAsRetain(hAlias);
513	DBGF_AS_DB_UNLOCK_READ(pVM);
514	}
515	}
516	else
517	/* Not an alias, just retain it. */
518	cRefs = RTDbgAsRetain(hAlias);
519
520	return cRefs != UINT32_MAX ? hAlias : NIL_RTDBGAS;
521	}
522
523
524	/**
525	* Query an address space by name.
526	*
527	* @returns Retained address space handle if found, NIL_RTDBGAS if not.
528	*
529	* @param pVM The VM handle.
530	* @param pszName The name.
531	*/
532	VMMR3DECL(RTDBGAS) DBGFR3AsQueryByName(PVM pVM, const char *pszName)
533	{
534	/*
535	* Validate the input.
536	*/
537	VM_ASSERT_VALID_EXT_RETURN(pVM, NIL_RTDBGAS);
538	AssertPtrReturn(pszName, NIL_RTDBGAS);
539	AssertReturn(*pszName, NIL_RTDBGAS);
540
541	/*
542	* Look it up in the string space and retain the result.
543	*/
544	RTDBGAS hDbgAs = NIL_RTDBGAS;
545	DBGF_AS_DB_LOCK_READ(pVM);
546
547	PRTSTRSPACECORE pNode = RTStrSpaceGet(&pVM->dbgf.s.AsNameSpace, pszName);
548	if (pNode)
549	{
550	PDBGFASDBNODE pDbNode = RT_FROM_MEMBER(pNode, DBGFASDBNODE, NameCore);
551	hDbgAs = (RTDBGAS)pDbNode->HandleCore.Key;
552	uint32_t cRefs = RTDbgAsRetain(hDbgAs);
553	if (RT_UNLIKELY(cRefs == UINT32_MAX))
554	hDbgAs = NIL_RTDBGAS;
555	}
556	DBGF_AS_DB_UNLOCK_READ(pVM);
557
558	return hDbgAs;
559	}
560
561
562	/**
563	* Query an address space by process ID.
564	*
565	* @returns Retained address space handle if found, NIL_RTDBGAS if not.
566	*
567	* @param pVM The VM handle.
568	* @param ProcId The process ID.
569	*/
570	VMMR3DECL(RTDBGAS) DBGFR3AsQueryByPid(PVM pVM, RTPROCESS ProcId)
571	{
572	/*
573	* Validate the input.
574	*/
575	VM_ASSERT_VALID_EXT_RETURN(pVM, NIL_RTDBGAS);
576	AssertReturn(ProcId != NIL_RTPROCESS, NIL_RTDBGAS);
577
578	/*
579	* Look it up in the PID tree and retain the result.
580	*/
581	RTDBGAS hDbgAs = NIL_RTDBGAS;
582	DBGF_AS_DB_LOCK_READ(pVM);
583
584	PAVLU32NODECORE pNode = RTAvlU32Get(&pVM->dbgf.s.AsPidTree, ProcId);
585	if (pNode)
586	{
587	PDBGFASDBNODE pDbNode = RT_FROM_MEMBER(pNode, DBGFASDBNODE, PidCore);
588	hDbgAs = (RTDBGAS)pDbNode->HandleCore.Key;
589	uint32_t cRefs = RTDbgAsRetain(hDbgAs);
590	if (RT_UNLIKELY(cRefs == UINT32_MAX))
591	hDbgAs = NIL_RTDBGAS;
592	}
593	DBGF_AS_DB_UNLOCK_READ(pVM);
594
595	return hDbgAs;
596	}
597
598
599	/**
600	* Searches for the file in the path.
601	*
602	* The file is first tested without any path modification, then we walk the path
603	* looking in each directory.
604	*
605	* @returns VBox status code.
606	* @param pszFilename The file to search for.
607	* @param pszPath The search path.
608	* @param pfnOpen The open callback function.
609	* @param pvUser User argument for the callback.
610	*/
611	static int dbgfR3AsSearchPath(const char pszFilename, const char pszPath, PFNDBGFR3ASSEARCHOPEN pfnOpen, void *pvUser)
612	{
613	char szFound[RTPATH_MAX];
614
615	/* Check the filename length. */
616	size_t const cchFilename = strlen(pszFilename);
617	if (cchFilename >= sizeof(szFound))
618	return VERR_FILENAME_TOO_LONG;
619	const char *pszName = RTPathFilename(pszFilename);
620	if (!pszName)
621	return VERR_IS_A_DIRECTORY;
622	size_t const cchName = strlen(pszName);
623
624	/*
625	* Try default location first.
626	*/
627	memcpy(szFound, pszFilename, cchFilename + 1);
628	int rc = pfnOpen(szFound, pvUser);
629	if (RT_SUCCESS(rc))
630	return rc;
631
632	/*
633	* Walk the search path.
634	*/
635	const char *psz = pszPath;
636	while (*psz)
637	{
638	/* Skip leading blanks - no directories with leading spaces, thank you. */
639	while (RT_C_IS_BLANK(*psz))
640	psz++;
641
642	/* Find the end of this element. */
643	const char *pszNext;
644	const char *pszEnd = strchr(psz, ';');
645	if (!pszEnd)
646	pszEnd = pszNext = strchr(psz, '\0');
647	else
648	pszNext = pszEnd + 1;
649	if (pszEnd != psz)
650	{
651	size_t const cch = pszEnd - psz;
652	if (cch + 1 + cchName < sizeof(szFound))
653	{
654	/** @todo RTPathCompose, RTPathComposeN(). This code isn't right
655	* for 'E:' on DOS systems. It may also create unwanted double slashes. */
656	memcpy(szFound, psz, cch);
657	szFound[cch] = '/';
658	memcpy(szFound + cch + 1, pszName, cchName + 1);
659	int rc2 = pfnOpen(szFound, pvUser);
660	if (RT_SUCCESS(rc2))
661	return rc2;
662	if ( rc2 != rc
663	&& ( rc == VERR_FILE_NOT_FOUND
664	\|\| rc == VERR_OPEN_FAILED))
665	rc = rc2;
666	}
667	}
668
669	/* advance */
670	psz = pszNext;
671	}
672
673	/*
674	* Walk the path once again, this time do a depth search.
675	*/
676	/** @todo do a depth search using the specified path. */
677
678	/* failed */
679	return rc;
680	}
681
682
683	/**
684	* Same as dbgfR3AsSearchEnv, except that the path is taken from the environment.
685	*
686	* It the environment variable doesn't exist, the current directory is searched instead.
687	*
688	* @returns VBox status code.
689	* @param pszFilename The filename.
690	* @param pszEnvVar The environment variable name.
691	* @param pfnOpen The open callback function.
692	* @param pvUser User argument for the callback.
693	*/
694	static int dbgfR3AsSearchEnvPath(const char pszFilename, const char pszEnvVar, PFNDBGFR3ASSEARCHOPEN pfnOpen, void *pvUser)
695	{
696	int rc;
697	char *pszPath = RTEnvDupEx(RTENV_DEFAULT, pszEnvVar);
698	if (pszPath)
699	{
700	rc = dbgfR3AsSearchPath(pszFilename, pszPath, pfnOpen, pvUser);
701	RTStrFree(pszPath);
702	}
703	else
704	rc = dbgfR3AsSearchPath(pszFilename, ".", pfnOpen, pvUser);
705	return rc;
706	}
707
708
709	/**
710	* Callback function used by DBGFR3AsLoadImage.
711	*
712	* @returns VBox status code.
713	* @param pszFilename The filename under evaluation.
714	* @param pvUser Use arguments (DBGFR3ASLOADOPENDATA).
715	*/
716	static DECLCALLBACK(int) dbgfR3AsLoadImageOpen(const char pszFilename, void pvUser)
717	{
718	DBGFR3ASLOADOPENDATA pData = (DBGFR3ASLOADOPENDATA )pvUser;
719	return RTDbgModCreateFromImage(&pData->hMod, pszFilename, pData->pszModName, pData->fFlags);
720	}
721
722
723	/**
724	* Load symbols from an executable module into the specified address space.
725	*
726	* If an module exist at the specified address it will be replaced by this
727	* call, otherwise a new module is created.
728	*
729	* @returns VBox status code.
730	*
731	* @param pVM The VM handle.
732	* @param hDbgAs The address space.
733	* @param pszFilename The filename of the executable module.
734	* @param pszModName The module name. If NULL, then then the file name
735	* base is used (no extension or nothing).
736	* @param pModAddress The load address of the module.
737	* @param iModSeg The segment to load, pass NIL_RTDBGSEGIDX to load
738	* the whole image.
739	* @param fFlags Flags reserved for future extensions, must be 0.
740	*/
741	VMMR3DECL(int) DBGFR3AsLoadImage(PVM pVM, RTDBGAS hDbgAs, const char pszFilename, const char pszModName, PCDBGFADDRESS pModAddress, RTDBGSEGIDX iModSeg, uint32_t fFlags)
742	{
743	/*
744	* Validate input
745	*/
746	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
747	AssertReturn(*pszFilename, VERR_INVALID_PARAMETER);
748	AssertReturn(DBGFR3AddrIsValid(pVM, pModAddress), VERR_INVALID_PARAMETER);
749	AssertReturn(fFlags == 0, VERR_INVALID_PARAMETER);
750	RTDBGAS hRealAS = DBGFR3AsResolveAndRetain(pVM, hDbgAs);
751	if (hRealAS == NIL_RTDBGAS)
752	return VERR_INVALID_HANDLE;
753
754	/*
755	* Do the work.
756	*/
757	DBGFR3ASLOADOPENDATA Data;
758	Data.pszModName = pszModName;
759	Data.uSubtrahend = 0;
760	Data.fFlags = 0;
761	Data.hMod = NIL_RTDBGMOD;
762	int rc = dbgfR3AsSearchEnvPath(pszFilename, "VBOXDBG_IMAGE_PATH", dbgfR3AsLoadImageOpen, &Data);
763	if (RT_FAILURE(rc))
764	rc = dbgfR3AsSearchEnvPath(pszFilename, "VBOXDBG_PATH", dbgfR3AsLoadImageOpen, &Data);
765	if (RT_SUCCESS(rc))
766	{
767	rc = DBGFR3AsLinkModule(pVM, hRealAS, Data.hMod, pModAddress, iModSeg, 0);
768	if (RT_FAILURE(rc))
769	RTDbgModRelease(Data.hMod);
770	}
771
772	RTDbgAsRelease(hRealAS);
773	return rc;
774	}
775
776
777	/**
778	* Callback function used by DBGFR3AsLoadMap.
779	*
780	* @returns VBox status code.
781	* @param pszFilename The filename under evaluation.
782	* @param pvUser Use arguments (DBGFR3ASLOADOPENDATA).
783	*/
784	static DECLCALLBACK(int) dbgfR3AsLoadMapOpen(const char pszFilename, void pvUser)
785	{
786	DBGFR3ASLOADOPENDATA pData = (DBGFR3ASLOADOPENDATA )pvUser;
787	return RTDbgModCreateFromMap(&pData->hMod, pszFilename, pData->pszModName, pData->uSubtrahend, pData->fFlags);
788	}
789
790
791	/**
792	* Load symbols from a map file into a module at the specified address space.
793	*
794	* If an module exist at the specified address it will be replaced by this
795	* call, otherwise a new module is created.
796	*
797	* @returns VBox status code.
798	*
799	* @param pVM The VM handle.
800	* @param hDbgAs The address space.
801	* @param pszFilename The map file.
802	* @param pszModName The module name. If NULL, then then the file name
803	* base is used (no extension or nothing).
804	* @param pModAddress The load address of the module.
805	* @param iModSeg The segment to load, pass NIL_RTDBGSEGIDX to load
806	* the whole image.
807	* @param uSubtrahend Value to to subtract from the symbols in the map
808	* file. This is useful for the linux System.map and
809	* /proc/kallsyms.
810	* @param fFlags Flags reserved for future extensions, must be 0.
811	*/
812	VMMR3DECL(int) DBGFR3AsLoadMap(PVM pVM, RTDBGAS hDbgAs, const char pszFilename, const char pszModName,
813	PCDBGFADDRESS pModAddress, RTDBGSEGIDX iModSeg, RTGCUINTPTR uSubtrahend, uint32_t fFlags)
814	{
815	/*
816	* Validate input
817	*/
818	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
819	AssertReturn(*pszFilename, VERR_INVALID_PARAMETER);
820	AssertReturn(DBGFR3AddrIsValid(pVM, pModAddress), VERR_INVALID_PARAMETER);
821	AssertReturn(fFlags == 0, VERR_INVALID_PARAMETER);
822	RTDBGAS hRealAS = DBGFR3AsResolveAndRetain(pVM, hDbgAs);
823	if (hRealAS == NIL_RTDBGAS)
824	return VERR_INVALID_HANDLE;
825
826	/*
827	* Do the work.
828	*/
829	DBGFR3ASLOADOPENDATA Data;
830	Data.pszModName = pszModName;
831	Data.uSubtrahend = uSubtrahend;
832	Data.fFlags = 0;
833	Data.hMod = NIL_RTDBGMOD;
834	int rc = dbgfR3AsSearchEnvPath(pszFilename, "VBOXDBG_MAP_PATH", dbgfR3AsLoadMapOpen, &Data);
835	if (RT_FAILURE(rc))
836	rc = dbgfR3AsSearchEnvPath(pszFilename, "VBOXDBG_PATH", dbgfR3AsLoadMapOpen, &Data);
837	if (RT_SUCCESS(rc))
838	{
839	rc = DBGFR3AsLinkModule(pVM, hRealAS, Data.hMod, pModAddress, iModSeg, 0);
840	if (RT_FAILURE(rc))
841	RTDbgModRelease(Data.hMod);
842	}
843
844	RTDbgAsRelease(hRealAS);
845	return rc;
846	}
847
848
849	/**
850	* Wrapper around RTDbgAsModuleLink, RTDbgAsModuleLinkSeg and DBGFR3AsResolve.
851	*
852	* @returns VBox status code.
853	* @param pVM The VM handle.
854	* @param hDbgAs The address space handle.
855	* @param hMod The module handle.
856	* @param pModAddress The link address.
857	* @param iModSeg The segment to link, NIL_RTDBGSEGIDX for the entire image.
858	* @param fFlags Flags to pass to the link functions, see RTDBGASLINK_FLAGS_*.
859	*/
860	VMMR3DECL(int) DBGFR3AsLinkModule(PVM pVM, RTDBGAS hDbgAs, RTDBGMOD hMod, PCDBGFADDRESS pModAddress, RTDBGSEGIDX iModSeg, uint32_t fFlags)
861	{
862	/*
863	* Input validation.
864	*/
865	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
866	AssertReturn(DBGFR3AddrIsValid(pVM, pModAddress), VERR_INVALID_PARAMETER);
867	RTDBGAS hRealAS = DBGFR3AsResolveAndRetain(pVM, hDbgAs);
868	if (hRealAS == NIL_RTDBGAS)
869	return VERR_INVALID_HANDLE;
870
871	/*
872	* Do the job.
873	*/
874	int rc;
875	if (iModSeg == NIL_RTDBGSEGIDX)
876	rc = RTDbgAsModuleLink(hRealAS, hMod, pModAddress->FlatPtr, fFlags);
877	else
878	rc = RTDbgAsModuleLinkSeg(hRealAS, hMod, iModSeg, pModAddress->FlatPtr, fFlags);
879
880	RTDbgAsRelease(hRealAS);
881	return rc;
882	}
883
884
885	/**
886	* Adds the module name to the symbol name.
887	*
888	* @param pSymbol The symbol info (in/out).
889	* @param hMod The module handle.
890	*/
891	static void dbgfR3AsSymbolJoinNames(PRTDBGSYMBOL pSymbol, RTDBGMOD hMod)
892	{
893	/* Figure the lengths, adjust them if the result is too long. */
894	const char *pszModName = RTDbgModName(hMod);
895	size_t cchModName = strlen(pszModName);
896	size_t cchSymbol = strlen(pSymbol->szName);
897	if (cchModName + 1 + cchSymbol >= sizeof(pSymbol->szName))
898	{
899	if (cchModName >= sizeof(pSymbol->szName) / 4)
900	cchModName = sizeof(pSymbol->szName) / 4;
901	if (cchModName + 1 + cchSymbol >= sizeof(pSymbol->szName))
902	cchSymbol = sizeof(pSymbol->szName) - cchModName - 2;
903	Assert(cchModName + 1 + cchSymbol < sizeof(pSymbol->szName));
904	}
905
906	/* Do the moving and copying. */
907	memmove(&pSymbol->szName[cchModName + 1], &pSymbol->szName[0], cchSymbol + 1);
908	memcpy(&pSymbol->szName[0], pszModName, cchModName);
909	pSymbol->szName[cchModName] = '!';
910	}
911
912
913	/** Temporary symbol conversion function. */
914	static void dbgfR3AsSymbolConvert(PRTDBGSYMBOL pSymbol, PCDBGFSYMBOL pDbgfSym)
915	{
916	pSymbol->offSeg = pSymbol->Value = pDbgfSym->Value;
917	pSymbol->cb = pDbgfSym->cb;
918	pSymbol->iSeg = 0;
919	pSymbol->fFlags = 0;
920	pSymbol->iOrdinal = UINT32_MAX;
921	strcpy(pSymbol->szName, pDbgfSym->szName);
922	}
923
924
925	/**
926	* Query a symbol by address.
927	*
928	* The returned symbol is the one we consider closes to the specified address.
929	*
930	* @returns VBox status code. See RTDbgAsSymbolByAddr.
931	*
932	* @param pVM The VM handle.
933	* @param hDbgAs The address space handle.
934	* @param pAddress The address to lookup.
935	* @param poffDisp Where to return the distance between the
936	* returned symbol and pAddress. Optional.
937	* @param pSymbol Where to return the symbol information.
938	* The returned symbol name will be prefixed by
939	* the module name as far as space allows.
940	* @param phMod Where to return the module handle. Optional.
941	*/
942	VMMR3DECL(int) DBGFR3AsSymbolByAddr(PVM pVM, RTDBGAS hDbgAs, PCDBGFADDRESS pAddress,
943	PRTGCINTPTR poffDisp, PRTDBGSYMBOL pSymbol, PRTDBGMOD phMod)
944	{
945	/*
946	* Implement the special address space aliases the lazy way.
947	*/
948	if (hDbgAs == DBGF_AS_RC_AND_GC_GLOBAL)
949	{
950	int rc = DBGFR3AsSymbolByAddr(pVM, DBGF_AS_RC, pAddress, poffDisp, pSymbol, phMod);
951	if (RT_FAILURE(rc))
952	rc = DBGFR3AsSymbolByAddr(pVM, DBGF_AS_GLOBAL, pAddress, poffDisp, pSymbol, phMod);
953	return rc;
954	}
955
956	/*
957	* Input validation.
958	*/
959	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
960	AssertReturn(DBGFR3AddrIsValid(pVM, pAddress), VERR_INVALID_PARAMETER);
961	AssertPtrNullReturn(poffDisp, VERR_INVALID_POINTER);
962	AssertPtrReturn(pSymbol, VERR_INVALID_POINTER);
963	AssertPtrNullReturn(phMod, VERR_INVALID_POINTER);
964	if (poffDisp)
965	*poffDisp = 0;
966	if (phMod)
967	*phMod = NIL_RTDBGMOD;
968	RTDBGAS hRealAS = DBGFR3AsResolveAndRetain(pVM, hDbgAs);
969	if (hRealAS == NIL_RTDBGAS)
970	return VERR_INVALID_HANDLE;
971
972	/*
973	* Do the lookup.
974	*/
975	RTDBGMOD hMod;
976	int rc = RTDbgAsSymbolByAddr(hRealAS, pAddress->FlatPtr, poffDisp, pSymbol, &hMod);
977	if (RT_SUCCESS(rc))
978	{
979	dbgfR3AsSymbolJoinNames(pSymbol, hMod);
980	if (!phMod)
981	RTDbgModRelease(hMod);
982	}
983	/* Temporary conversions. */
984	else if (hDbgAs == DBGF_AS_GLOBAL)
985	{
986	DBGFSYMBOL DbgfSym;
987	rc = DBGFR3SymbolByAddr(pVM, pAddress->FlatPtr, poffDisp, &DbgfSym);
988	if (RT_SUCCESS(rc))
989	dbgfR3AsSymbolConvert(pSymbol, &DbgfSym);
990	}
991	else if (hDbgAs == DBGF_AS_R0)
992	{
993	RTR0PTR R0PtrMod;
994	char szNearSym[260];
995	RTR0PTR R0PtrNearSym;
996	RTR0PTR R0PtrNearSym2;
997	rc = PDMR3LdrQueryR0ModFromPC(pVM, pAddress->FlatPtr,
998	pSymbol->szName, sizeof(pSymbol->szName) / 2, &R0PtrMod,
999	&szNearSym[0], sizeof(szNearSym), &R0PtrNearSym,
1000	NULL, 0, &R0PtrNearSym2);
1001	if (RT_SUCCESS(rc))
1002	{
1003	pSymbol->offSeg = pSymbol->Value = R0PtrNearSym;
1004	pSymbol->cb = R0PtrNearSym2 > R0PtrNearSym ? R0PtrNearSym2 - R0PtrNearSym : 0;
1005	pSymbol->iSeg = 0;
1006	pSymbol->fFlags = 0;
1007	pSymbol->iOrdinal = UINT32_MAX;
1008	size_t offName = strlen(pSymbol->szName);
1009	pSymbol->szName[offName++] = '!';
1010	size_t cchNearSym = strlen(szNearSym);
1011	if (cchNearSym + offName >= sizeof(pSymbol->szName))
1012	cchNearSym = sizeof(pSymbol->szName) - offName - 1;
1013	strncpy(&pSymbol->szName[offName], szNearSym, cchNearSym);
1014	pSymbol->szName[offName + cchNearSym] = '\0';
1015	if (poffDisp)
1016	*poffDisp = pAddress->FlatPtr - pSymbol->Value;
1017	}
1018	}
1019
1020	return rc;
1021	}
1022
1023
1024	/**
1025	* Convenience function that combines RTDbgSymbolDup and DBGFR3AsSymbolByAddr.
1026	*
1027	* @returns Pointer to the symbol on success. This must be free using
1028	* RTDbgSymbolFree(). NULL is returned if not found or any error
1029	* occurs.
1030	*
1031	* @param pVM The VM handle.
1032	* @param hDbgAs See DBGFR3AsSymbolByAddr.
1033	* @param pAddress See DBGFR3AsSymbolByAddr.
1034	* @param poffDisp See DBGFR3AsSymbolByAddr.
1035	* @param phMod See DBGFR3AsSymbolByAddr.
1036	*/
1037	VMMR3DECL(PRTDBGSYMBOL) DBGFR3AsSymbolByAddrA(PVM pVM, RTDBGAS hDbgAs, PCDBGFADDRESS pAddress, PRTGCINTPTR poffDisp, PRTDBGMOD phMod)
1038	{
1039	RTDBGSYMBOL SymInfo;
1040	int rc = DBGFR3AsSymbolByAddr(pVM, hDbgAs, pAddress, poffDisp, &SymInfo, phMod);
1041	if (RT_SUCCESS(rc))
1042	return RTDbgSymbolDup(&SymInfo);
1043	return NULL;
1044	}
1045
1046
1047	/**
1048	* Query a symbol by name.
1049	*
1050	* The symbol can be prefixed by a module name pattern to scope the search. The
1051	* pattern is a simple string pattern with '*' and '?' as wild chars. See
1052	* RTStrSimplePatternMatch().
1053	*
1054	* @returns VBox status code. See RTDbgAsSymbolByAddr.
1055	*
1056	* @param pVM The VM handle.
1057	* @param hDbgAs The address space handle.
1058	* @param pszSymbol The symbol to search for, maybe prefixed by a
1059	* module pattern.
1060	* @param pSymbol Where to return the symbol information.
1061	* The returned symbol name will be prefixed by
1062	* the module name as far as space allows.
1063	* @param phMod Where to return the module handle. Optional.
1064	*/
1065	VMMR3DECL(int) DBGFR3AsSymbolByName(PVM pVM, RTDBGAS hDbgAs, const char *pszSymbol,
1066	PRTDBGSYMBOL pSymbol, PRTDBGMOD phMod)
1067	{
1068	/*
1069	* Implement the special address space aliases the lazy way.
1070	*/
1071	if (hDbgAs == DBGF_AS_RC_AND_GC_GLOBAL)
1072	{
1073	int rc = DBGFR3AsSymbolByName(pVM, DBGF_AS_RC, pszSymbol, pSymbol, phMod);
1074	if (RT_FAILURE(rc))
1075	rc = DBGFR3AsSymbolByName(pVM, DBGF_AS_GLOBAL, pszSymbol, pSymbol, phMod);
1076	return rc;
1077	}
1078
1079	/*
1080	* Input validation.
1081	*/
1082	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1083	AssertPtrReturn(pSymbol, VERR_INVALID_POINTER);
1084	AssertPtrNullReturn(phMod, VERR_INVALID_POINTER);
1085	if (phMod)
1086	*phMod = NIL_RTDBGMOD;
1087	RTDBGAS hRealAS = DBGFR3AsResolveAndRetain(pVM, hDbgAs);
1088	if (hRealAS == NIL_RTDBGAS)
1089	return VERR_INVALID_HANDLE;
1090
1091
1092	/*
1093	* Do the lookup.
1094	*/
1095	RTDBGMOD hMod;
1096	int rc = RTDbgAsSymbolByName(hRealAS, pszSymbol, pSymbol, &hMod);
1097	if (RT_SUCCESS(rc))
1098	{
1099	dbgfR3AsSymbolJoinNames(pSymbol, hMod);
1100	if (!phMod)
1101	RTDbgModRelease(hMod);
1102	}
1103	/* Temporary conversion. */
1104	else if (hDbgAs == DBGF_AS_GLOBAL)
1105	{
1106	DBGFSYMBOL DbgfSym;
1107	rc = DBGFR3SymbolByName(pVM, pszSymbol, &DbgfSym);
1108	if (RT_SUCCESS(rc))
1109	dbgfR3AsSymbolConvert(pSymbol, &DbgfSym);
1110	}
1111
1112	return rc;
1113	}
1114

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source: vbox/trunk/src/VBox/VMM/DBGFAddrSpace.cpp@ 31082

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