DBGFSym.cpp@ 45578

Last change on this file since 45578 was 44528, checked in by vboxsync, 12 years ago
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1	/* $Id: DBGFSym.cpp 44528 2013-02-04 14:27:54Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Symbol Management.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 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	/*******************************************************************************
20	* Header Files *
21	*******************************************************************************/
22	#define LOG_GROUP LOG_GROUP_DBGF
23	#if defined(RT_OS_WINDOWS) && 0 //defined(DEBUG_bird) // enabled this is you want to debug win32 guests, the hypervisor of EFI.
24	# include <Windows.h>
25	# define _IMAGEHLP64
26	# include <DbgHelp.h>
27	# define HAVE_DBGHELP /* if doing guest stuff, this can be nice. */
28	#endif
29	/** @todo Only use DBGHELP for reading modules since it doesn't do all we want (relocations), or is way to slow in some cases (add symbol)! */
30	#include <VBox/vmm/dbgf.h>
31	#include <VBox/vmm/mm.h>
32	#include <VBox/vmm/pdmapi.h>
33	#include "DBGFInternal.h"
34	#include <VBox/vmm/vm.h>
35	#include <VBox/vmm/uvm.h>
36	#include <VBox/err.h>
37	#include <VBox/log.h>
38
39	#include <iprt/assert.h>
40	#include <iprt/path.h>
41	#include <iprt/ctype.h>
42	#include <iprt/env.h>
43	#include <iprt/param.h>
44	#ifndef HAVE_DBGHELP
45	# include <iprt/avl.h>
46	# include <iprt/string.h>
47	#endif
48
49	#include <stdio.h> /* for fopen(). / /* @todo use iprt/stream.h! */
50	#include <stdlib.h>
51
52
53	/*******************************************************************************
54	* Internal Functions *
55	*******************************************************************************/
56	#ifdef HAVE_DBGHELP
57	static DECLCALLBACK(int) dbgfR3EnumModules(PVM pVM, const char pszFilename, const char pszName,
58	RTUINTPTR ImageBase, size_t cbImage, bool fRC, void *pvArg);
59	static int win32Error(PVM pVM);
60	#endif
61
62
63	/*******************************************************************************
64	* Structures and Typedefs *
65	*******************************************************************************/
66	#ifndef HAVE_DBGHELP
67	/* later */
68	typedef struct DBGFMOD *PDBGFMOD;
69
70	/**
71	* Internal representation of a symbol.
72	*/
73	typedef struct DBGFSYM
74	{
75	/** Node core with the symbol address range. */
76	AVLRGCPTRNODECORE Core;
77	/** Pointer to the module this symbol is associated with. */
78	PDBGFMOD pModule;
79	/** Pointer to the next symbol in with this name. */
80	struct DBGFSYM *pNext;
81	/** Symbol name. */
82	char szName[1];
83	} DBGFSYM, *PDBGFSYM;
84
85	/**
86	* Symbol name space node.
87	*/
88	typedef struct DBGFSYMSPACE
89	{
90	/** Node core with the symbol name.
91	* (it's allocated in the same block as this struct) */
92	RTSTRSPACECORE Core;
93	/** Pointer to the first symbol with this name (LIFO). */
94	PDBGFSYM pSym;
95	} DBGFSYMSPACE, *PDBGFSYMSPACE;
96
97	#endif
98
99
100
101	/*******************************************************************************
102	* Internal Functions *
103	*******************************************************************************/
104	#ifndef HAVE_DBGHELP
105
106	/**
107	* Initializes the symbol tree.
108	*/
109	static int dbgfR3SymbolInit(PVM pVM)
110	{
111	PDBGFSYM pSym = (PDBGFSYM)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pSym));
112	if (pSym)
113	{
114	pSym->Core.Key = 0;
115	pSym->Core.KeyLast = ~0;
116	pSym->pModule = NULL;
117	pSym->szName[0] = '\0';
118	if (RTAvlrGCPtrInsert(&pVM->dbgf.s.SymbolTree, &pSym->Core))
119	return VINF_SUCCESS;
120	AssertReleaseMsgFailed(("Failed to insert %RGv-%RGv!\n", pSym->Core.Key, pSym->Core.KeyLast));
121	return VERR_INTERNAL_ERROR;
122	}
123	return VERR_NO_MEMORY;
124	}
125
126
127	/**
128	* Insert a record into the symbol tree.
129	*/
130	static int dbgfR3SymbolInsert(PVM pVM, const char *pszName, RTGCPTR Address, size_t cb, PDBGFMOD pModule)
131	{
132	/*
133	* Make the address space node.
134	*/
135	size_t cchName = strlen(pszName) + 1;
136	PDBGFSYM pSym = (PDBGFSYM)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, RT_OFFSETOF(DBGFSYM, szName[cchName]));
137	if (pSym)
138	{
139	pSym->Core.Key = Address;
140	pSym->Core.KeyLast = Address + cb;
141	pSym->pModule = pModule;
142	memcpy(pSym->szName, pszName, cchName);
143
144	PDBGFSYM pOld = (PDBGFSYM)RTAvlrGCPtrRangeGet(&pVM->dbgf.s.SymbolTree, (RTGCPTR)Address);
145	if (pOld)
146	{
147	pSym->Core.KeyLast = pOld->Core.KeyLast;
148	if (pOld->Core.Key == pSym->Core.Key)
149	{
150	pOld = (PDBGFSYM)RTAvlrGCPtrRemove(&pVM->dbgf.s.SymbolTree, (RTGCPTR)Address);
151	AssertRelease(pOld);
152	MMR3HeapFree(pOld);
153	}
154	else
155	pOld->Core.KeyLast = Address - 1;
156	if (RTAvlrGCPtrInsert(&pVM->dbgf.s.SymbolTree, &pSym->Core))
157	{
158	/*
159	* Make the name space node.
160	*/
161	PDBGFSYMSPACE pName = (PDBGFSYMSPACE)RTStrSpaceGet(pVM->dbgf.s.pSymbolSpace, pszName);
162	if (!pName)
163	{
164	/* make new symbol space node. */
165	pName = (PDBGFSYMSPACE)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pName) + cchName);
166	if (pName)
167	{
168	pName->Core.pszString = (char *)memcpy(pName + 1, pszName, cchName);
169	pName->pSym = pSym;
170	if (RTStrSpaceInsert(pVM->dbgf.s.pSymbolSpace, &pName->Core))
171	return VINF_SUCCESS;
172	}
173	else
174	return VINF_SUCCESS;
175	}
176	else
177	{
178	/* Add to existing symbol name. */
179	pSym->pNext = pName->pSym;
180	pName->pSym = pSym;
181	return VINF_SUCCESS;
182	}
183	}
184	AssertReleaseMsgFailed(("Failed to insert %RGv-%RGv!\n", pSym->Core.Key, pSym->Core.KeyLast));
185	}
186	else
187	AssertMsgFailed(("pOld! %RGv %s\n", pSym->Core.Key, pszName));
188	return VERR_INTERNAL_ERROR;
189
190	}
191	return VERR_NO_MEMORY;
192	}
193
194
195	/**
196	* Get nearest symbol.
197	* @returns NULL if no symbol was the for that address.
198	*/
199	static PDBGFSYM dbgfR3SymbolGetAddr(PVM pVM, RTGCPTR Address)
200	{
201	PDBGFSYM pSym = (PDBGFSYM)RTAvlrGCPtrRangeGet(&pVM->dbgf.s.SymbolTree, Address);
202	Assert(pSym);
203	if (pSym && pSym->szName[0])
204	return pSym;
205	return NULL;
206	}
207
208
209	/**
210	* Get first symbol.
211	* @returns NULL if no symbol by that name.
212	*/
213	static PDBGFSYM dbgfR3SymbolGetName(PVM pVM, const char *pszSymbol)
214	{
215	PDBGFSYMSPACE pName = (PDBGFSYMSPACE)RTStrSpaceGet(pVM->dbgf.s.pSymbolSpace, pszSymbol);
216	if (pName)
217	return pName->pSym;
218	return NULL;
219	}
220
221	#endif
222
223
224	/**
225	* Strips all kind of spaces from head and tail of a string.
226	*/
227	static char dbgfR3Strip(char psz)
228	{
229	while (psz && RT_C_IS_SPACE(psz))
230	psz++;
231	char *psz2 = strchr(psz, '\0') - 1;
232	while (psz2 >= psz && RT_C_IS_SPACE(*psz2))
233	*psz2-- = '\0';
234	return psz;
235	}
236
237
238	/**
239	* Initialize the debug info for a VM.
240	*
241	* This will check the CFGM for any symbols or symbol files
242	* which needs loading.
243	*
244	* @returns VBox status code.
245	* @param pVM Pointer to the VM.
246	*/
247	int dbgfR3SymInit(PVM pVM)
248	{
249	int rc;
250
251	/*
252	* Initialize the symbol table.
253	*/
254	pVM->dbgf.s.pSymbolSpace = (PRTSTRSPACE)MMR3HeapAllocZ(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pVM->dbgf.s.pSymbolSpace));
255	AssertReturn(pVM->dbgf.s.pSymbolSpace, VERR_NO_MEMORY);
256
257	#ifndef HAVE_DBGHELP
258	/* modules & lines later */
259	rc = dbgfR3SymbolInit(pVM);
260	if (RT_FAILURE(rc))
261	return rc;
262	pVM->dbgf.s.fSymInited = true;
263	#endif
264
265	/** @todo symbol search path setup. */
266
267	/*
268	* Check if there are 'loadsyms' commands in the configuration.
269	*/
270	PCFGMNODE pNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/DBGF/loadsyms/");
271	if (pNode)
272	{
273	/*
274	* Enumerate the commands.
275	*/
276	for (PCFGMNODE pCmdNode = CFGMR3GetFirstChild(pNode);
277	pCmdNode;
278	pCmdNode = CFGMR3GetNextChild(pCmdNode))
279	{
280	char szCmdName[128];
281	CFGMR3GetName(pCmdNode, &szCmdName[0], sizeof(szCmdName));
282
283	/* File */
284	char *pszFilename;
285	rc = CFGMR3QueryStringAlloc(pCmdNode, "Filename", &pszFilename);
286	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'File' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
287
288	/* Delta (optional) */
289	RTGCINTPTR offDelta;
290	rc = CFGMR3QueryGCPtrS(pNode, "Delta", &offDelta);
291	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
292	offDelta = 0;
293	else
294	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Delta' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
295
296	/* Module (optional) */
297	char *pszModule;
298	rc = CFGMR3QueryStringAlloc(pCmdNode, "Module", &pszModule);
299	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
300	pszModule = NULL;
301	else
302	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Module' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
303
304	/* Module (optional) */
305	RTGCUINTPTR ModuleAddress;
306	rc = CFGMR3QueryGCPtrU(pNode, "ModuleAddress", &ModuleAddress);
307	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
308	ModuleAddress = 0;
309	else
310	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'ModuleAddress' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
311
312	/* Image size (optional) */
313	RTGCUINTPTR cbModule;
314	rc = CFGMR3QueryGCPtrU(pNode, "ModuleSize", &cbModule);
315	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
316	cbModule = 0;
317	else
318	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'ModuleAddress' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
319
320
321	/*
322	* Execute the command.
323	*/
324	rc = DBGFR3ModuleLoad(pVM->pUVM, pszFilename, offDelta, pszModule, ModuleAddress, cbModule);
325	AssertMsgRCReturn(rc, ("pszFilename=%s offDelta=%RGv pszModule=%s ModuleAddress=%RGv cbModule=%RGv\n",
326	pszFilename, offDelta, pszModule, ModuleAddress, cbModule), rc);
327
328	MMR3HeapFree(pszModule);
329	MMR3HeapFree(pszFilename);
330	}
331	}
332
333	/*
334	* Check if there are 'loadmap' commands in the configuration.
335	*/
336	pNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/DBGF/loadmap/");
337	if (pNode)
338	{
339	/*
340	* Enumerate the commands.
341	*/
342	for (PCFGMNODE pCmdNode = CFGMR3GetFirstChild(pNode);
343	pCmdNode;
344	pCmdNode = CFGMR3GetNextChild(pCmdNode))
345	{
346	char szCmdName[128];
347	CFGMR3GetName(pCmdNode, &szCmdName[0], sizeof(szCmdName));
348
349	/* File */
350	char *pszFilename;
351	rc = CFGMR3QueryStringAlloc(pCmdNode, "Filename", &pszFilename);
352	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'File' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
353
354	/* Address. */
355	RTGCPTR GCPtrAddr;
356	rc = CFGMR3QueryGCPtrUDef(pNode, "Address", &GCPtrAddr, 0);
357	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Address' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
358	DBGFADDRESS ModAddr;
359	DBGFR3AddrFromFlat(pVM->pUVM, &ModAddr, GCPtrAddr);
360
361	/* Name (optional) */
362	char *pszModName;
363	rc = CFGMR3QueryStringAllocDef(pCmdNode, "Name", &pszModName, NULL);
364	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Name' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
365
366	/* Subtrahend (optional) */
367	RTGCPTR offSubtrahend;
368	rc = CFGMR3QueryGCPtrDef(pNode, "Subtrahend", &offSubtrahend, 0);
369	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Subtrahend' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
370
371	/* Segment (optional) */
372	uint32_t iSeg;
373	rc = CFGMR3QueryU32Def(pNode, "Segment", &iSeg, UINT32_MAX);
374	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Segment' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
375
376	/*
377	* Execute the command.
378	*/
379	rc = DBGFR3AsLoadMap(pVM->pUVM, DBGF_AS_GLOBAL, pszFilename, pszModName, &ModAddr,
380	iSeg == UINT32_MAX ? NIL_RTDBGSEGIDX : iSeg, offSubtrahend, 0 /fFlags/);
381	AssertMsgRCReturn(rc, ("pszFilename=%s pszModName=%s ModAddr=%RGv offSubtrahend=%#x iSeg=%#x\n",
382	pszFilename, pszModName, ModAddr.FlatPtr, offSubtrahend, iSeg), rc);
383
384	MMR3HeapFree(pszModName);
385	MMR3HeapFree(pszFilename);
386	}
387	}
388
389	/*
390	* Check if there are any 'symadd' commands in the configuration.
391	*/
392
393	return VINF_SUCCESS;
394	}
395
396
397	/**
398	* We delay certain
399	* Initialize the debug info for a VM.
400	*/
401	int dbgfR3SymLazyInit(PVM pVM)
402	{
403	if (pVM->dbgf.s.fSymInited)
404	return VINF_SUCCESS;
405	#ifdef HAVE_DBGHELP
406	if (SymInitialize(pVM, NULL, FALSE))
407	{
408	pVM->dbgf.s.fSymInited = true;
409	SymSetOptions(SYMOPT_LOAD_LINES \| SYMOPT_AUTO_PUBLICS \| SYMOPT_ALLOW_ABSOLUTE_SYMBOLS);
410
411	/*
412	* Enumerate all modules loaded by PDM and add them to the symbol database.
413	*/
414	PDMR3LdrEnumModules(pVM, dbgfR3EnumModules, NULL);
415	return VINF_SUCCESS;
416	}
417	return win32Error(pVM);
418	#else
419	return VINF_SUCCESS;
420	#endif
421	}
422
423
424	#ifdef HAVE_DBGHELP
425	/**
426	* Module enumeration callback function.
427	*
428	* @returns VBox status.
429	* Failure will stop the search and return the return code.
430	* Warnings will be ignored and not returned.
431	* @param pVM Pointer to the VM.
432	* @param pszFilename Module filename.
433	* @param pszName Module name. (short and unique)
434	* @param ImageBase Address where to executable image is loaded.
435	* @param cbImage Size of the executable image.
436	* @param fRC Set if guest context, clear if host context.
437	* @param pvArg User argument.
438	*/
439	static DECLCALLBACK(int) dbgfR3EnumModules(PVM pVM, const char pszFilename, const char pszName,
440	RTUINTPTR ImageBase, size_t cbImage, bool fRC, void *pvArg)
441	{
442	DWORD64 LoadedImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszFilename,
443	(char )(void )pszName, ImageBase, (DWORD)cbImage);
444	if (!LoadedImageBase)
445	Log(("SymLoadModule64(,,%s,,) -> lasterr=%d\n", pszFilename, GetLastError()));
446	else
447	Log(("Loaded debuginfo for %s - %s %llx\n", pszName, pszFilename, LoadedImageBase));
448
449	return VINF_SUCCESS;
450	}
451	#endif
452
453
454	/**
455	* Terminate the debug info repository for the specified VM.
456	*
457	* @returns VBox status.
458	* @param pVM Pointer to the VM.
459	*/
460	int dbgfR3SymTerm(PVM pVM)
461	{
462	#ifdef HAVE_DBGHELP
463	if (pVM->dbgf.s.fSymInited)
464	SymCleanup(pVM);
465	pVM->dbgf.s.fSymInited = false;
466	return VINF_SUCCESS;
467	#else
468	pVM->dbgf.s.SymbolTree = 0; /* MM cleans up allocations */
469	pVM->dbgf.s.fSymInited = false;
470	return VINF_SUCCESS;
471	#endif
472	}
473
474
475	/** Symbol file type.. */
476	typedef enum SYMFILETYPE
477	{
478	SYMFILETYPE_UNKNOWN,
479	SYMFILETYPE_LD_MAP,
480	SYMFILETYPE_MS_MAP,
481	SYMFILETYPE_OBJDUMP,
482	SYMFILETYPE_LINUX_SYSTEM_MAP,
483	SYMFILETYPE_PDB,
484	SYMFILETYPE_DBG,
485	SYMFILETYPE_MZ,
486	SYMFILETYPE_ELF
487	} SYMFILETYPE, *PSYMFILETYPE;
488
489
490
491	/**
492	* Probe the type of a symbol information file.
493	*
494	* @returns The file type.
495	* @param pFile File handle.
496	*/
497	SYMFILETYPE dbgfR3ModuleProbe(FILE *pFile)
498	{
499	char szHead[4096];
500	size_t cchHead = fread(szHead, 1, sizeof(szHead) - 1, pFile);
501	if (cchHead > 0)
502	{
503	szHead[cchHead] = '\0';
504	if (strstr(szHead, "Preferred load address is"))
505	return SYMFILETYPE_MS_MAP;
506
507	if ( strstr(szHead, "Archive member included because of")
508	\|\| strstr(szHead, "Memory Configuration")
509	\|\| strstr(szHead, "Linker script and memory map"))
510	return SYMFILETYPE_LD_MAP;
511
512	if ( RT_C_IS_XDIGIT(szHead[0])
513	&& RT_C_IS_XDIGIT(szHead[1])
514	&& RT_C_IS_XDIGIT(szHead[2])
515	&& RT_C_IS_XDIGIT(szHead[3])
516	&& RT_C_IS_XDIGIT(szHead[4])
517	&& RT_C_IS_XDIGIT(szHead[5])
518	&& RT_C_IS_XDIGIT(szHead[6])
519	&& RT_C_IS_XDIGIT(szHead[7])
520	&& szHead[8] == ' '
521	&& RT_C_IS_ALPHA(szHead[9])
522	&& szHead[10] == ' '
523	&& (RT_C_IS_ALPHA(szHead[11]) \|\| szHead[11] == '_' \|\| szHead[11] == '$')
524	)
525	return SYMFILETYPE_LINUX_SYSTEM_MAP;
526
527	if ( RT_C_IS_XDIGIT(szHead[0])
528	&& RT_C_IS_XDIGIT(szHead[1])
529	&& RT_C_IS_XDIGIT(szHead[2])
530	&& RT_C_IS_XDIGIT(szHead[3])
531	&& RT_C_IS_XDIGIT(szHead[4])
532	&& RT_C_IS_XDIGIT(szHead[5])
533	&& RT_C_IS_XDIGIT(szHead[6])
534	&& RT_C_IS_XDIGIT(szHead[7])
535	&& RT_C_IS_XDIGIT(szHead[8])
536	&& RT_C_IS_XDIGIT(szHead[9])
537	&& RT_C_IS_XDIGIT(szHead[10])
538	&& RT_C_IS_XDIGIT(szHead[11])
539	&& RT_C_IS_XDIGIT(szHead[12])
540	&& RT_C_IS_XDIGIT(szHead[13])
541	&& RT_C_IS_XDIGIT(szHead[14])
542	&& RT_C_IS_XDIGIT(szHead[15])
543	&& szHead[16] == ' '
544	&& RT_C_IS_ALPHA(szHead[17])
545	&& szHead[18] == ' '
546	&& (RT_C_IS_ALPHA(szHead[19]) \|\| szHead[19] == '_' \|\| szHead[19] == '$')
547	)
548	return SYMFILETYPE_LINUX_SYSTEM_MAP;
549
550	if (strstr(szHead, "Microsoft C/C++ MSF") == szHead)
551	return SYMFILETYPE_PDB;
552
553	if (strstr(szHead, "ELF") == szHead + 1)
554	return SYMFILETYPE_ELF;
555
556	if ( strstr(szHead, "MZ") == szHead
557	\|\| strstr(szHead, "PE") == szHead
558	\|\| strstr(szHead, "LE") == szHead
559	\|\| strstr(szHead, "LX") == szHead
560	\|\| strstr(szHead, "NE") == szHead)
561	return SYMFILETYPE_MZ;
562
563
564	if (strstr(szHead, "file format"))
565	return SYMFILETYPE_OBJDUMP;
566	}
567
568	return SYMFILETYPE_UNKNOWN;
569	}
570
571
572	static int dbgfR3LoadLinuxSystemMap(PVM pVM, FILE *pFile, RTGCUINTPTR ModuleAddress, RTGCUINTPTR AddressDelta)
573	{
574	char szLine[4096];
575	while (fgets(szLine, sizeof(szLine), pFile))
576	{
577	/* parse the line: <address> <type> <name> */
578	const char *psz = dbgfR3Strip(szLine);
579	char *pszEnd = NULL;
580	uint64_t u64Address;
581	int rc = RTStrToUInt64Ex(psz, &pszEnd, 16, &u64Address);
582	RTGCUINTPTR Address = u64Address;
583	if ( RT_SUCCESS(rc)
584	&& (pszEnd == ' ' \|\| pszEnd == '\t')
585	&& Address == u64Address
586	&& u64Address != 0
587	&& u64Address != (RTGCUINTPTR)~0)
588	{
589	pszEnd++;
590	if ( RT_C_IS_ALPHA(*pszEnd)
591	&& (pszEnd[1] == ' ' \|\| pszEnd[1] == '\t'))
592	{
593	psz = dbgfR3Strip(pszEnd + 2);
594	if (*psz)
595	{
596	int rc2 = DBGFR3SymbolAdd(pVM, ModuleAddress, Address + AddressDelta, 0, psz);
597	if (RT_FAILURE(rc2))
598	Log2(("DBGFR3SymbolAdd(,, %RGv, 0, '%s') -> %Rrc\n", Address, psz, rc2));
599	}
600	}
601	}
602	}
603	return VINF_SUCCESS;
604	}
605
606	/**
607	* Tries to open the file using the image search paths.
608	*
609	* This is currently a quick hack and the only way to specifying the path is by setting
610	* VBOXDBG_IMAGE_PATH in the environment. It uses semicolon as separator everywhere.
611	*
612	* @returns VBox status code.
613	* @param pVM Pointer to the VM.
614	* @param pszFilename The name of the file to locate and open.
615	* @param pszFound Where to return the actual filename.
616	* @param cchFound The buffer size.
617	* @param ppFile Where to return the opened file.
618	*/
619	int dbgfR3ModuleLocateAndOpen(PVM pVM, const char pszFilename, char pszFound, size_t cchFound, FILE **ppFile)
620	{
621	NOREF(pVM);
622
623	/* Check the filename length. */
624	size_t const cchFilename = strlen(pszFilename);
625	if (cchFilename >= cchFound)
626	return VERR_FILENAME_TOO_LONG;
627	const char *pszName = RTPathFilename(pszFilename);
628	if (!pszName)
629	return VERR_IS_A_DIRECTORY;
630	size_t const cchName = strlen(pszName);
631
632	/*
633	* Try default location first.
634	*/
635	memcpy(pszFound, pszFilename, cchFilename + 1);
636	FILE pFile = ppFile = fopen(pszFound, "rb");
637	if (pFile)
638	return VINF_SUCCESS;
639
640	/*
641	* Walk the search path.
642	*/
643	char *pszFreeMe = RTEnvDupEx(RTENV_DEFAULT, "VBOXDBG_IMAGE_PATH");
644	const char *psz = pszFreeMe ? pszFreeMe : ".";
645	while (*psz)
646	{
647	/* Skip leading blanks - no directories with leading spaces, thank you. */
648	while (RT_C_IS_BLANK(*psz))
649	psz++;
650
651	/* Fine the end of this element. */
652	const char *pszNext;
653	const char *pszEnd = strchr(psz, ';');
654	if (!pszEnd)
655	pszEnd = pszNext = strchr(psz, '\0');
656	else
657	pszNext = pszEnd + 1;
658	if (pszEnd != psz)
659	{
660	size_t const cch = pszEnd - psz;
661	if (cch + 1 + cchName < cchFound)
662	{
663	/** @todo RTPathCompose, RTPathComposeN(). This code isn't right
664	* for 'E:' on DOS systems. It may also create unwanted double slashes. */
665	memcpy(pszFound, psz, cch);
666	pszFound[cch] = '/';
667	memcpy(pszFound + cch + 1, pszName, cchName + 1);
668	*ppFile = pFile = fopen(pszFound, "rb");
669	if (pFile)
670	{
671	RTStrFree(pszFreeMe);
672	return VINF_SUCCESS;
673	}
674	}
675
676	/** @todo do a depth search using the specified path. */
677	}
678
679	/* advance */
680	psz = pszNext;
681	}
682
683	/* not found */
684	RTStrFree(pszFreeMe);
685	return VERR_OPEN_FAILED;
686	}
687
688
689	/**
690	* Load debug info, optionally related to a specific module.
691	*
692	* @returns VBox status.
693	* @param pUVM The user mode VM handle.
694	* @param pszFilename Path to the file containing the symbol information.
695	* This can be the executable image, a flat symbol file of some kind or stripped debug info.
696	* @param AddressDelta The value to add to the loaded symbols.
697	* @param pszName Short hand name for the module. If not related to a module specify NULL.
698	* @param ModuleAddress Address which the image is loaded at. This will be used to reference the module other places in the api.
699	* Ignored when pszName is NULL.
700	* @param cbImage Size of the image.
701	* Ignored when pszName is NULL.
702	*/
703	VMMR3DECL(int) DBGFR3ModuleLoad(PUVM pUVM, const char pszFilename, RTGCUINTPTR AddressDelta, const char pszName,
704	RTGCUINTPTR ModuleAddress, unsigned cbImage)
705	{
706	NOREF(cbImage);
707
708	/*
709	* Lazy init.
710	*/
711	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
712	PVM pVM = pUVM->pVM;
713	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
714	if (!pVM->dbgf.s.fSymInited)
715	{
716	int rc = dbgfR3SymLazyInit(pVM);
717	if (RT_FAILURE(rc))
718	return rc;
719	}
720
721	/*
722	* Open the load file.
723	*/
724	FILE *pFile = NULL;
725	char szFoundFile[RTPATH_MAX];
726	int rc = dbgfR3ModuleLocateAndOpen(pVM, pszFilename, szFoundFile, sizeof(szFoundFile), &pFile);
727	if (pFile)
728	{
729	/*
730	* Probe the file type.
731	*/
732	SYMFILETYPE enmType = dbgfR3ModuleProbe(pFile);
733	if (enmType != SYMFILETYPE_UNKNOWN)
734	{
735	/*
736	* Add the module.
737	*/
738	if (pszName)
739	{
740	#ifdef HAVE_DBGHELP
741	/** @todo arg! checkout the inserting of modules and then loading them again.... Or just the module representation.... */
742	DWORD64 ImageBase = SymLoadModule64(pVM, NULL, (char )(void )szFoundFile, (char )(void )pszName, ModuleAddress, cbImage);
743	if (!ImageBase)
744	ImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszName, (char )(void )pszName, ModuleAddress, cbImage);
745	if (ImageBase)
746	{
747	AssertMsg(ModuleAddress == 0 \|\| ModuleAddress == ImageBase, ("ModuleAddres=%RGv ImageBase=%llx\n", ModuleAddress, ImageBase));
748	ModuleAddress = ImageBase;
749	}
750	else
751	rc = win32Error(pVM);
752	#else
753	rc = VERR_NOT_IMPLEMENTED;
754	#endif
755	}
756	if (RT_SUCCESS(rc))
757	{
758	/*
759	* Seek to the start of the file.
760	*/
761	rc = fseek(pFile, 0, SEEK_SET);
762	Assert(!rc);
763
764	/*
765	* Process the specific.
766	*/
767	switch (enmType)
768	{
769	case SYMFILETYPE_LINUX_SYSTEM_MAP:
770	rc = dbgfR3LoadLinuxSystemMap(pVM, pFile, ModuleAddress, AddressDelta);
771	break;
772
773	case SYMFILETYPE_PDB:
774	case SYMFILETYPE_DBG:
775	case SYMFILETYPE_MZ:
776	#ifdef HAVE_DBGHELP
777	/* done it all above! */
778	break;
779	#endif
780	case SYMFILETYPE_LD_MAP:
781	case SYMFILETYPE_MS_MAP:
782	case SYMFILETYPE_OBJDUMP:
783	case SYMFILETYPE_ELF:
784	rc = VERR_NOT_SUPPORTED;
785	break;
786
787	default:
788	AssertFailed();
789	rc = VERR_INTERNAL_ERROR;
790	break;
791	} /* file switch. */
792	} /* module added successfully. */
793	} /* format identified */
794	else
795	rc = VERR_NOT_SUPPORTED;
796	/** @todo check for read errors */
797	fclose(pFile);
798	}
799	return rc;
800	}
801
802
803	/**
804	* Interface used by PDMR3LdrRelocate for telling us that a GC module has been relocated.
805	*
806	* @param pVM Pointer to the VM.
807	* @param OldImageBase The old image base.
808	* @param NewImageBase The new image base.
809	* @param cbImage The image size.
810	* @param pszFilename The image filename.
811	* @param pszName The module name.
812	*/
813	VMMR3_INT_DECL(void) DBGFR3ModuleRelocate(PVM pVM, RTGCUINTPTR OldImageBase, RTGCUINTPTR NewImageBase, RTGCUINTPTR cbImage,
814	const char pszFilename, const char pszName)
815	{
816	#ifdef HAVE_DBGHELP
817	if (pVM->dbgf.s.fSymInited)
818	{
819	if (!SymUnloadModule64(pVM, OldImageBase))
820	Log(("SymUnloadModule64(,%RGv) failed, lasterr=%d\n", OldImageBase, GetLastError()));
821
822	DWORD ImageSize = (DWORD)cbImage; Assert(ImageSize == cbImage);
823	DWORD64 LoadedImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszFilename, (char )(void )pszName, NewImageBase, ImageSize);
824	if (!LoadedImageBase)
825	Log(("SymLoadModule64(,,%s,,) -> lasterr=%d (relocate)\n", pszFilename, GetLastError()));
826	else
827	Log(("Reloaded debuginfo for %s - %s %llx\n", pszName, pszFilename, LoadedImageBase));
828	}
829	#else
830	NOREF(pVM); NOREF(OldImageBase); NOREF(NewImageBase); NOREF(cbImage); NOREF(pszFilename); NOREF(pszName);
831	#endif
832	}
833
834
835	/**
836	* Adds a symbol to the debug info manager.
837	*
838	* @returns VBox status.
839	* @param pVM Pointer to the VM.
840	* @param ModuleAddress Module address. Use 0 if no module.
841	* @param SymbolAddress Symbol address
842	* @param cbSymbol Size of the symbol. Use 0 if info not available.
843	* @param pszSymbol Symbol name.
844	*/
845	VMMR3_INT_DECL(int) DBGFR3SymbolAdd(PVM pVM, RTGCUINTPTR ModuleAddress, RTGCUINTPTR SymbolAddress, RTUINT cbSymbol,
846	const char *pszSymbol)
847	{
848	/*
849	* Validate.
850	*/
851	if (!pszSymbol \|\| !*pszSymbol)
852	{
853	AssertMsgFailed(("No symbol name!\n"));
854	return VERR_INVALID_PARAMETER;
855	}
856
857	/*
858	* Lazy init.
859	*/
860	if (!pVM->dbgf.s.fSymInited)
861	{
862	int rc = dbgfR3SymLazyInit(pVM);
863	if (RT_FAILURE(rc))
864	return rc;
865	}
866
867	#ifdef HAVE_DBGHELP
868	if (SymAddSymbol(pVM, ModuleAddress, (char )(void )pszSymbol, SymbolAddress, cbSymbol, 0))
869	return VINF_SUCCESS;
870	return win32Error(pVM);
871	#else
872	NOREF(ModuleAddress); /** @todo module lookup. */
873	return dbgfR3SymbolInsert(pVM, pszSymbol, SymbolAddress, cbSymbol, NULL);
874	#endif
875	}
876
877
878	/**
879	* Find symbol by address (nearest).
880	*
881	* @returns VBox status.
882	* @param pVM Pointer to the VM.
883	* @param Address Address.
884	* @param poffDisplacement Where to store the symbol displacement from Address.
885	* @param pSymbol Where to store the symbol info.
886	*/
887	VMMR3_INT_DECL(int) DBGFR3SymbolByAddr(PVM pVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement, PDBGFSYMBOL pSymbol)
888	{
889	/*
890	* Lazy init.
891	*/
892	if (!pVM->dbgf.s.fSymInited)
893	{
894	int rc = dbgfR3SymLazyInit(pVM);
895	if (RT_FAILURE(rc))
896	return rc;
897	}
898
899	/*
900	* Look it up.
901	*/
902	#ifdef HAVE_DBGHELP
903	char achBuffer[sizeof(IMAGEHLP_SYMBOL64) + DBGF_SYMBOL_NAME_LENGTH * sizeof(TCHAR) + sizeof(ULONG64)];
904	PIMAGEHLP_SYMBOL64 pSym = (PIMAGEHLP_SYMBOL64)&achBuffer[0];
905	pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
906	pSym->MaxNameLength = DBGF_SYMBOL_NAME_LENGTH;
907
908	if (SymGetSymFromAddr64(pVM, Address, (PDWORD64)poffDisplacement, pSym))
909	{
910	pSymbol->Value = (RTGCUINTPTR)pSym->Address;
911	pSymbol->cb = pSym->Size;
912	pSymbol->fFlags = pSym->Flags;
913	strcpy(pSymbol->szName, pSym->Name);
914	return VINF_SUCCESS;
915	}
916	//return win32Error(pVM);
917
918	#else
919
920	PDBGFSYM pSym = dbgfR3SymbolGetAddr(pVM, Address);
921	if (pSym)
922	{
923	pSymbol->Value = pSym->Core.Key;
924	pSymbol->cb = pSym->Core.KeyLast - pSym->Core.Key + 1;
925	pSymbol->fFlags = 0;
926	pSymbol->szName[0] = '\0';
927	strncat(pSymbol->szName, pSym->szName, sizeof(pSymbol->szName) - 1);
928	if (poffDisplacement)
929	*poffDisplacement = Address - pSymbol->Value;
930	return VINF_SUCCESS;
931	}
932
933	#endif
934
935	/*
936	* Try PDM.
937	*/
938	if (MMHyperIsInsideArea(pVM, Address))
939	{
940	char szModName[64];
941	RTRCPTR RCPtrMod;
942	char szNearSym1[260];
943	RTRCPTR RCPtrNearSym1;
944	char szNearSym2[260];
945	RTRCPTR RCPtrNearSym2;
946	int rc = PDMR3LdrQueryRCModFromPC(pVM, Address,
947	&szModName[0], sizeof(szModName), &RCPtrMod,
948	&szNearSym1[0], sizeof(szNearSym1), &RCPtrNearSym1,
949	&szNearSym2[0], sizeof(szNearSym2), &RCPtrNearSym2);
950	if (RT_SUCCESS(rc) && szNearSym1[0])
951	{
952	pSymbol->Value = RCPtrNearSym1;
953	pSymbol->cb = RCPtrNearSym2 > RCPtrNearSym1 ? RCPtrNearSym2 - RCPtrNearSym1 : 0;
954	pSymbol->fFlags = 0;
955	pSymbol->szName[0] = '\0';
956	strncat(pSymbol->szName, szNearSym1, sizeof(pSymbol->szName) - 1);
957	if (poffDisplacement)
958	*poffDisplacement = Address - pSymbol->Value;
959	return VINF_SUCCESS;
960	}
961	}
962
963	return VERR_SYMBOL_NOT_FOUND;
964	}
965
966
967	/**
968	* Find symbol by name (first).
969	*
970	* @returns VBox status.
971	* @param pVM Pointer to the VM.
972	* @param pszSymbol Symbol name.
973	* @param pSymbol Where to store the symbol info.
974	*/
975	VMMR3_INT_DECL(int) DBGFR3SymbolByName(PVM pVM, const char *pszSymbol, PDBGFSYMBOL pSymbol)
976	{
977	/*
978	* Lazy init.
979	*/
980	if (!pVM->dbgf.s.fSymInited)
981	{
982	int rc = dbgfR3SymLazyInit(pVM);
983	if (RT_FAILURE(rc))
984	return rc;
985	}
986
987	/*
988	* Look it up.
989	*/
990	#ifdef HAVE_DBGHELP
991	char achBuffer[sizeof(IMAGEHLP_SYMBOL64) + DBGF_SYMBOL_NAME_LENGTH * sizeof(TCHAR) + sizeof(ULONG64)];
992	PIMAGEHLP_SYMBOL64 pSym = (PIMAGEHLP_SYMBOL64)&achBuffer[0];
993	pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
994	pSym->MaxNameLength = DBGF_SYMBOL_NAME_LENGTH;
995
996	if (SymGetSymFromName64(pVM, (char )(void )pszSymbol, pSym))
997	{
998	pSymbol->Value = (RTGCUINTPTR)pSym->Address;
999	pSymbol->cb = pSym->Size;
1000	pSymbol->fFlags = pSym->Flags;
1001	strcpy(pSymbol->szName, pSym->Name);
1002	return VINF_SUCCESS;
1003	}
1004	return win32Error(pVM);
1005	#else
1006
1007	PDBGFSYM pSym = dbgfR3SymbolGetName(pVM, pszSymbol);
1008	if (pSym)
1009	{
1010	pSymbol->Value = pSym->Core.Key;
1011	pSymbol->cb = pSym->Core.KeyLast - pSym->Core.Key + 1;
1012	pSymbol->fFlags = 0;
1013	pSymbol->szName[0] = '\0';
1014	strncat(pSymbol->szName, pSym->szName, sizeof(pSymbol->szName) - 1);
1015	return VINF_SUCCESS;
1016	}
1017
1018	return VERR_SYMBOL_NOT_FOUND;
1019	#endif
1020	}
1021
1022
1023	/**
1024	* Find line by address (nearest).
1025	*
1026	* @returns VBox status.
1027	* @param pUVM The user mode VM handle.
1028	* @param Address Address.
1029	* @param poffDisplacement Where to store the line displacement from Address.
1030	* @param pLine Where to store the line info.
1031	*/
1032	VMMR3DECL(int) DBGFR3LineByAddr(PUVM pUVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement, PDBGFLINE pLine)
1033	{
1034	/*
1035	* Lazy init.
1036	*/
1037	UVM_ASSERT_VALID_EXT_RETURN(pUVM, VERR_INVALID_VM_HANDLE);
1038	PVM pVM = pUVM->pVM;
1039	VM_ASSERT_VALID_EXT_RETURN(pVM, VERR_INVALID_VM_HANDLE);
1040	if (!pVM->dbgf.s.fSymInited)
1041	{
1042	int rc = dbgfR3SymLazyInit(pVM);
1043	if (RT_FAILURE(rc))
1044	return rc;
1045	}
1046
1047	/*
1048	* Look it up.
1049	*/
1050	#ifdef HAVE_DBGHELP
1051	IMAGEHLP_LINE64 Line = {0};
1052	DWORD off = 0;
1053	Line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
1054	if (SymGetLineFromAddr64(pVM, Address, &off, &Line))
1055	{
1056	if (poffDisplacement)
1057	*poffDisplacement = (long)off;
1058	pLine->Address = (RTGCUINTPTR)Line.Address;
1059	pLine->uLineNo = Line.LineNumber;
1060	pLine->szFilename[0] = '\0';
1061	strncat(pLine->szFilename, Line.FileName, sizeof(pLine->szFilename));
1062	return VINF_SUCCESS;
1063	}
1064	return win32Error(pVM);
1065	#else
1066	NOREF(pVM); NOREF(Address); NOREF(poffDisplacement); NOREF(pLine);
1067	return VERR_NOT_IMPLEMENTED;
1068	#endif
1069	}
1070
1071
1072	/**
1073	* Duplicates a line.
1074	*
1075	* @returns VBox status code.
1076	* @param pUVM The user mode VM handle.
1077	* @param pLine The line to duplicate.
1078	*/
1079	static PDBGFLINE dbgfR3LineDup(PUVM pUVM, PCDBGFLINE pLine)
1080	{
1081	size_t cb = strlen(pLine->szFilename) + RT_OFFSETOF(DBGFLINE, szFilename[1]);
1082	PDBGFLINE pDup = (PDBGFLINE)MMR3HeapAllocU(pUVM, MM_TAG_DBGF_LINE_DUP, cb);
1083	if (pDup)
1084	memcpy(pDup, pLine, cb);
1085	return pDup;
1086	}
1087
1088
1089	/**
1090	* Find line by address (nearest), allocate return buffer.
1091	*
1092	* @returns Pointer to the line. Must be freed using DBGFR3LineFree().
1093	* @returns NULL if the line was not found or if we're out of memory.
1094	* @param pUVM The user mode VM handle.
1095	* @param Address Address.
1096	* @param poffDisplacement Where to store the line displacement from Address.
1097	*/
1098	VMMR3DECL(PDBGFLINE) DBGFR3LineByAddrAlloc(PUVM pUVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement)
1099	{
1100	DBGFLINE Line;
1101	int rc = DBGFR3LineByAddr(pUVM, Address, poffDisplacement, &Line);
1102	if (RT_FAILURE(rc))
1103	return NULL;
1104	return dbgfR3LineDup(pUVM, &Line);
1105	}
1106
1107
1108	/**
1109	* Frees a line returned by DBGFR3LineByAddressAlloc().
1110	*
1111	* @param pLine Pointer to the line.
1112	*/
1113	VMMR3_INT_DECL(void) DBGFR3LineFree(PDBGFLINE pLine)
1114	{
1115	if (pLine)
1116	MMR3HeapFree(pLine);
1117	}
1118
1119
1120	#ifdef HAVE_DBGHELP
1121
1122	//static BOOL CALLBACK win32EnumModulesCallback(PSTR ModuleName, DWORD64 BaseOfDll, PVOID UserContext)
1123	//{
1124	// Log(("dbg: module: %08llx %s\n", ModuleName, BaseOfDll));
1125	// return TRUE;
1126	//}
1127
1128	static int win32Error(PVM pVM)
1129	{
1130	int rc = GetLastError();
1131	Log(("Lasterror=%d\n", rc));
1132
1133	//SymEnumerateModules64(pVM, win32EnumModulesCallback, NULL);
1134
1135	return VERR_GENERAL_FAILURE;
1136	}
1137	#endif
1138

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source: vbox/trunk/src/VBox/VMM/VMMR3/DBGFSym.cpp@ 45578

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