DBGFSym.cpp@ 26173

Last change on this file since 26173 was 26152, checked in by vboxsync, 15 years ago
VMM: pdm.h and @copydoc cleanups.
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1	/* $Id: DBGFSym.cpp 26152 2010-02-02 16:00:35Z vboxsync $ */
2	/** @file
3	* DBGF - Debugger Facility, Symbol Management.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18	* Clara, CA 95054 USA or visit http://www.sun.com if you need
19	* additional information or have any questions.
20	*/
21
22
23	/*******************************************************************************
24	* Header Files *
25	*******************************************************************************/
26	#define LOG_GROUP LOG_GROUP_DBGF
27	#if defined(RT_OS_WINDOWS) && 0 //defined(DEBUG_bird) // enabled this is you want to debug win32 guests, the hypervisor of EFI.
28	# include <Windows.h>
29	# define _IMAGEHLP64
30	# include <DbgHelp.h>
31	# define HAVE_DBGHELP /* if doing guest stuff, this can be nice. */
32	#endif
33	/** @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)! */
34	#include <VBox/dbgf.h>
35	#include <VBox/mm.h>
36	#include <VBox/pdmapi.h>
37	#include "DBGFInternal.h"
38	#include <VBox/vm.h>
39	#include <VBox/err.h>
40	#include <VBox/log.h>
41
42	#include <iprt/assert.h>
43	#include <iprt/path.h>
44	#include <iprt/ctype.h>
45	#include <iprt/env.h>
46	#include <iprt/param.h>
47	#ifndef HAVE_DBGHELP
48	# include <iprt/avl.h>
49	# include <iprt/string.h>
50	#endif
51
52	#include <stdio.h> /* for fopen(). / /* @todo use iprt/stream.h! */
53	#include <stdlib.h>
54
55
56	/*******************************************************************************
57	* Internal Functions *
58	*******************************************************************************/
59	#ifdef HAVE_DBGHELP
60	static DECLCALLBACK(int) dbgfR3EnumModules(PVM pVM, const char pszFilename, const char pszName,
61	RTUINTPTR ImageBase, size_t cbImage, bool fRC, void *pvArg);
62	static int win32Error(PVM pVM);
63	#endif
64
65
66	/*******************************************************************************
67	* Structures and Typedefs *
68	*******************************************************************************/
69	#ifndef HAVE_DBGHELP
70	/* later */
71	typedef struct DBGFMOD *PDBGFMOD;
72
73	/**
74	* Internal represenation of a symbol.
75	*/
76	typedef struct DBGFSYM
77	{
78	/** Node core with the symbol address range. */
79	AVLRGCPTRNODECORE Core;
80	/** Pointer to the module this symbol is associated with. */
81	PDBGFMOD pModule;
82	/** Pointer to the next symbol in with this name. */
83	struct DBGFSYM *pNext;
84	/** Symbol name. */
85	char szName[1];
86	} DBGFSYM, *PDBGFSYM;
87
88	/**
89	* Symbol name space node.
90	*/
91	typedef struct DBGFSYMSPACE
92	{
93	/** Node core with the symbol name.
94	* (it's allocated in the same block as this struct) */
95	RTSTRSPACECORE Core;
96	/** Pointer to the first symbol with this name (LIFO). */
97	PDBGFSYM pSym;
98	} DBGFSYMSPACE, *PDBGFSYMSPACE;
99
100	#endif
101
102
103
104	/*******************************************************************************
105	* Internal Functions *
106	*******************************************************************************/
107	#ifndef HAVE_DBGHELP
108
109	/**
110	* Initializes the symbol tree.
111	*/
112	static int dbgfR3SymbolInit(PVM pVM)
113	{
114	PDBGFSYM pSym = (PDBGFSYM)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pSym));
115	if (pSym)
116	{
117	pSym->Core.Key = 0;
118	pSym->Core.KeyLast = ~0;
119	pSym->pModule = NULL;
120	pSym->szName[0] = '\0';
121	if (RTAvlrGCPtrInsert(&pVM->dbgf.s.SymbolTree, &pSym->Core))
122	return VINF_SUCCESS;
123	AssertReleaseMsgFailed(("Failed to insert %RGv-%RGv!\n", pSym->Core.Key, pSym->Core.KeyLast));
124	return VERR_INTERNAL_ERROR;
125	}
126	return VERR_NO_MEMORY;
127	}
128
129
130	/**
131	* Insert a record into the symbol tree.
132	*/
133	static int dbgfR3SymbolInsert(PVM pVM, const char *pszName, RTGCPTR Address, size_t cb, PDBGFMOD pModule)
134	{
135	/*
136	* Make the address space node.
137	*/
138	size_t cchName = strlen(pszName) + 1;
139	PDBGFSYM pSym = (PDBGFSYM)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, RT_OFFSETOF(DBGFSYM, szName[cchName]));
140	if (pSym)
141	{
142	pSym->Core.Key = Address;
143	pSym->Core.KeyLast = Address + cb;
144	pSym->pModule = pModule;
145	memcpy(pSym->szName, pszName, cchName);
146
147	PDBGFSYM pOld = (PDBGFSYM)RTAvlrGCPtrRangeGet(&pVM->dbgf.s.SymbolTree, (RTGCPTR)Address);
148	if (pOld)
149	{
150	pSym->Core.KeyLast = pOld->Core.KeyLast;
151	if (pOld->Core.Key == pSym->Core.Key)
152	{
153	pOld = (PDBGFSYM)RTAvlrGCPtrRemove(&pVM->dbgf.s.SymbolTree, (RTGCPTR)Address);
154	AssertRelease(pOld);
155	MMR3HeapFree(pOld);
156	}
157	else
158	pOld->Core.KeyLast = Address - 1;
159	if (RTAvlrGCPtrInsert(&pVM->dbgf.s.SymbolTree, &pSym->Core))
160	{
161	/*
162	* Make the name space node.
163	*/
164	PDBGFSYMSPACE pName = (PDBGFSYMSPACE)RTStrSpaceGet(pVM->dbgf.s.pSymbolSpace, pszName);
165	if (!pName)
166	{
167	/* make new symbol space node. */
168	pName = (PDBGFSYMSPACE)MMR3HeapAlloc(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pName) + cchName);
169	if (pName)
170	{
171	pName->Core.pszString = (char *)memcpy(pName + 1, pszName, cchName);
172	pName->pSym = pSym;
173	if (RTStrSpaceInsert(pVM->dbgf.s.pSymbolSpace, &pName->Core))
174	return VINF_SUCCESS;
175	}
176	else
177	return VINF_SUCCESS;
178	}
179	else
180	{
181	/* Add to existing symbol name. */
182	pSym->pNext = pName->pSym;
183	pName->pSym = pSym;
184	return VINF_SUCCESS;
185	}
186	}
187	AssertReleaseMsgFailed(("Failed to insert %RGv-%RGv!\n", pSym->Core.Key, pSym->Core.KeyLast));
188	}
189	else
190	AssertMsgFailed(("pOld! %RGv %s\n", pSym->Core.Key, pszName));
191	return VERR_INTERNAL_ERROR;
192
193	}
194	return VERR_NO_MEMORY;
195	}
196
197
198	/**
199	* Get nearest symbol.
200	* @returns NULL if no symbol was the for that address.
201	*/
202	static PDBGFSYM dbgfR3SymbolGetAddr(PVM pVM, RTGCPTR Address)
203	{
204	PDBGFSYM pSym = (PDBGFSYM)RTAvlrGCPtrRangeGet(&pVM->dbgf.s.SymbolTree, Address);
205	Assert(pSym);
206	if (pSym && pSym->szName[0])
207	return pSym;
208	return NULL;
209	}
210
211
212	/**
213	* Get first symbol.
214	* @returns NULL if no symbol by that name.
215	*/
216	static PDBGFSYM dbgfR3SymbolGetName(PVM pVM, const char *pszSymbol)
217	{
218	PDBGFSYMSPACE pName = (PDBGFSYMSPACE)RTStrSpaceGet(pVM->dbgf.s.pSymbolSpace, pszSymbol);
219	if (pName)
220	return pName->pSym;
221	return NULL;
222	}
223
224	#endif
225
226
227	/**
228	* Strips all kind of spaces from head and tail of a string.
229	*/
230	static char dbgfR3Strip(char psz)
231	{
232	while (psz && RT_C_IS_SPACE(psz))
233	psz++;
234	char *psz2 = strchr(psz, '\0') - 1;
235	while (psz2 >= psz && RT_C_IS_SPACE(*psz2))
236	*psz2-- = '\0';
237	return psz;
238	}
239
240
241	/**
242	* Initialize the debug info for a VM.
243	*
244	* This will check the CFGM for any symbols or symbol files
245	* which needs loading.
246	*
247	* @returns VBox status code.
248	* @param pVM The VM handle.
249	*/
250	int dbgfR3SymInit(PVM pVM)
251	{
252	int rc;
253
254	/*
255	* Initialize the symbol table.
256	*/
257	pVM->dbgf.s.pSymbolSpace = (PRTSTRSPACE)MMR3HeapAllocZ(pVM, MM_TAG_DBGF_SYMBOL, sizeof(*pVM->dbgf.s.pSymbolSpace));
258	AssertReturn(pVM->dbgf.s.pSymbolSpace, VERR_NO_MEMORY);
259
260	#ifndef HAVE_DBGHELP
261	/* modules & lines later */
262	rc = dbgfR3SymbolInit(pVM);
263	if (RT_FAILURE(rc))
264	return rc;
265	pVM->dbgf.s.fSymInited = true;
266	#endif
267
268	/*
269	* Check if there are 'loadsyms' commands in the configuration.
270	*/
271	PCFGMNODE pNode = CFGMR3GetChild(CFGMR3GetRoot(pVM), "/DBGF/loadsyms/");
272	if (pNode)
273	{
274	/*
275	* Enumerate the commands.
276	*/
277	for (PCFGMNODE pCmdNode = CFGMR3GetFirstChild(pNode);
278	pCmdNode;
279	pCmdNode = CFGMR3GetNextChild(pCmdNode))
280	{
281	char szCmdName[128];
282	CFGMR3GetName(pCmdNode, &szCmdName[0], sizeof(szCmdName));
283
284	/* File */
285	char *pszFilename;
286	rc = CFGMR3QueryStringAlloc(pCmdNode, "Filename", &pszFilename);
287	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'File' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
288
289	/* Delta (optional) */
290	RTGCINTPTR offDelta;
291	rc = CFGMR3QueryGCPtrS(pNode, "Delta", &offDelta);
292	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
293	offDelta = 0;
294	else
295	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Delta' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
296
297	/* Module (optional) */
298	char *pszModule;
299	rc = CFGMR3QueryStringAlloc(pCmdNode, "Module", &pszModule);
300	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
301	pszModule = NULL;
302	else
303	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'Module' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
304
305	/* Module (optional) */
306	RTGCUINTPTR ModuleAddress;
307	rc = CFGMR3QueryGCPtrU(pNode, "ModuleAddress", &ModuleAddress);
308	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
309	ModuleAddress = 0;
310	else
311	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'ModuleAddress' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
312
313	/* Image size (optional) */
314	RTGCUINTPTR cbModule;
315	rc = CFGMR3QueryGCPtrU(pNode, "ModuleSize", &cbModule);
316	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
317	cbModule = 0;
318	else
319	AssertMsgRCReturn(rc, ("rc=%Rrc querying the 'ModuleAddress' attribute of '/DBGF/loadsyms/%s'!\n", rc, szCmdName), rc);
320
321
322	/*
323	* Execute the command.
324	*/
325	rc = DBGFR3ModuleLoad(pVM, pszFilename, offDelta, pszModule, ModuleAddress, cbModule);
326	AssertMsgRCReturn(rc, ("pszFilename=%s offDelta=%RGv pszModule=%s ModuleAddress=%RGv cbModule=%RGv\n",
327	pszFilename, offDelta, pszModule, ModuleAddress, cbModule), rc);
328
329	MMR3HeapFree(pszModule);
330	MMR3HeapFree(pszFilename);
331	}
332	}
333
334	/*
335	* Check if there are any 'symadd' commands in the configuration.
336	*/
337
338	return VINF_SUCCESS;
339	}
340
341
342	/**
343	* We delay certain
344	* Initialize the debug info for a VM.
345	*/
346	int dbgfR3SymLazyInit(PVM pVM)
347	{
348	if (pVM->dbgf.s.fSymInited)
349	return VINF_SUCCESS;
350	#ifdef HAVE_DBGHELP
351	if (SymInitialize(pVM, NULL, FALSE))
352	{
353	pVM->dbgf.s.fSymInited = true;
354	SymSetOptions(SYMOPT_LOAD_LINES \| SYMOPT_AUTO_PUBLICS \| SYMOPT_ALLOW_ABSOLUTE_SYMBOLS);
355
356	/*
357	* Enumerate all modules loaded by PDM and add them to the symbol database.
358	*/
359	PDMR3LdrEnumModules(pVM, dbgfR3EnumModules, NULL);
360	return VINF_SUCCESS;
361	}
362	return win32Error(pVM);
363	#else
364	return VINF_SUCCESS;
365	#endif
366	}
367
368
369	#ifdef HAVE_DBGHELP
370	/**
371	* Module enumeration callback function.
372	*
373	* @returns VBox status.
374	* Failure will stop the search and return the return code.
375	* Warnings will be ignored and not returned.
376	* @param pVM VM Handle.
377	* @param pszFilename Module filename.
378	* @param pszName Module name. (short and unique)
379	* @param ImageBase Address where to executable image is loaded.
380	* @param cbImage Size of the executable image.
381	* @param fRC Set if guest context, clear if host context.
382	* @param pvArg User argument.
383	*/
384	static DECLCALLBACK(int) dbgfR3EnumModules(PVM pVM, const char pszFilename, const char pszName,
385	RTUINTPTR ImageBase, size_t cbImage, bool fRC, void *pvArg)
386	{
387	DWORD64 LoadedImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszFilename,
388	(char )(void )pszName, ImageBase, (DWORD)cbImage);
389	if (!LoadedImageBase)
390	Log(("SymLoadModule64(,,%s,,) -> lasterr=%d\n", pszFilename, GetLastError()));
391	else
392	Log(("Loaded debuginfo for %s - %s %llx\n", pszName, pszFilename, LoadedImageBase));
393
394	return VINF_SUCCESS;
395	}
396	#endif
397
398
399	/**
400	* Terminate the debug info repository for the specified VM.
401	*
402	* @returns VBox status.
403	* @param pVM VM Handle.
404	*/
405	int dbgfR3SymTerm(PVM pVM)
406	{
407	#ifdef HAVE_DBGHELP
408	if (pVM->dbgf.s.fSymInited)
409	SymCleanup(pVM);
410	pVM->dbgf.s.fSymInited = false;
411	return VINF_SUCCESS;
412	#else
413	pVM->dbgf.s.SymbolTree = 0; /* MM cleans up allocations */
414	pVM->dbgf.s.fSymInited = false;
415	return VINF_SUCCESS;
416	#endif
417	}
418
419
420	/** Symbol file type.. */
421	typedef enum SYMFILETYPE
422	{
423	SYMFILETYPE_UNKNOWN,
424	SYMFILETYPE_LD_MAP,
425	SYMFILETYPE_MS_MAP,
426	SYMFILETYPE_OBJDUMP,
427	SYMFILETYPE_LINUX_SYSTEM_MAP,
428	SYMFILETYPE_PDB,
429	SYMFILETYPE_DBG,
430	SYMFILETYPE_MZ,
431	SYMFILETYPE_ELF
432	} SYMFILETYPE, *PSYMFILETYPE;
433
434
435
436	/**
437	* Probe the type of a symbol information file.
438	*
439	* @returns The file type.
440	* @param pFile File handle.
441	*/
442	SYMFILETYPE dbgfR3ModuleProbe(FILE *pFile)
443	{
444	char szHead[4096];
445	size_t cchHead = fread(szHead, 1, sizeof(szHead) - 1, pFile);
446	if (cchHead > 0)
447	{
448	szHead[cchHead] = '\0';
449	if (strstr(szHead, "Preferred load address is"))
450	return SYMFILETYPE_MS_MAP;
451
452	if ( strstr(szHead, "Archive member included because of")
453	\|\| strstr(szHead, "Memory Configuration")
454	\|\| strstr(szHead, "Linker script and memory map"))
455	return SYMFILETYPE_LD_MAP;
456
457	if ( RT_C_IS_XDIGIT(szHead[0])
458	&& RT_C_IS_XDIGIT(szHead[1])
459	&& RT_C_IS_XDIGIT(szHead[2])
460	&& RT_C_IS_XDIGIT(szHead[3])
461	&& RT_C_IS_XDIGIT(szHead[4])
462	&& RT_C_IS_XDIGIT(szHead[5])
463	&& RT_C_IS_XDIGIT(szHead[6])
464	&& RT_C_IS_XDIGIT(szHead[7])
465	&& szHead[8] == ' '
466	&& RT_C_IS_ALPHA(szHead[9])
467	&& szHead[10] == ' '
468	&& (RT_C_IS_ALPHA(szHead[11]) \|\| szHead[11] == '_' \|\| szHead[11] == '$')
469	)
470	return SYMFILETYPE_LINUX_SYSTEM_MAP;
471
472	if ( RT_C_IS_XDIGIT(szHead[0])
473	&& RT_C_IS_XDIGIT(szHead[1])
474	&& RT_C_IS_XDIGIT(szHead[2])
475	&& RT_C_IS_XDIGIT(szHead[3])
476	&& RT_C_IS_XDIGIT(szHead[4])
477	&& RT_C_IS_XDIGIT(szHead[5])
478	&& RT_C_IS_XDIGIT(szHead[6])
479	&& RT_C_IS_XDIGIT(szHead[7])
480	&& RT_C_IS_XDIGIT(szHead[8])
481	&& RT_C_IS_XDIGIT(szHead[9])
482	&& RT_C_IS_XDIGIT(szHead[10])
483	&& RT_C_IS_XDIGIT(szHead[11])
484	&& RT_C_IS_XDIGIT(szHead[12])
485	&& RT_C_IS_XDIGIT(szHead[13])
486	&& RT_C_IS_XDIGIT(szHead[14])
487	&& RT_C_IS_XDIGIT(szHead[15])
488	&& szHead[16] == ' '
489	&& RT_C_IS_ALPHA(szHead[17])
490	&& szHead[18] == ' '
491	&& (RT_C_IS_ALPHA(szHead[19]) \|\| szHead[19] == '_' \|\| szHead[19] == '$')
492	)
493	return SYMFILETYPE_LINUX_SYSTEM_MAP;
494
495	if (strstr(szHead, "Microsoft C/C++ MSF") == szHead)
496	return SYMFILETYPE_PDB;
497
498	if (strstr(szHead, "ELF") == szHead + 1)
499	return SYMFILETYPE_ELF;
500
501	if ( strstr(szHead, "MZ") == szHead
502	\|\| strstr(szHead, "PE") == szHead
503	\|\| strstr(szHead, "LE") == szHead
504	\|\| strstr(szHead, "LX") == szHead
505	\|\| strstr(szHead, "NE") == szHead)
506	return SYMFILETYPE_MZ;
507
508
509	if (strstr(szHead, "file format"))
510	return SYMFILETYPE_OBJDUMP;
511	}
512
513	return SYMFILETYPE_UNKNOWN;
514	}
515
516
517	static int dbgfR3LoadLinuxSystemMap(PVM pVM, FILE *pFile, RTGCUINTPTR ModuleAddress, RTGCUINTPTR AddressDelta)
518	{
519	char szLine[4096];
520	while (fgets(szLine, sizeof(szLine), pFile))
521	{
522	/* parse the line: <address> <type> <name> */
523	const char *psz = dbgfR3Strip(szLine);
524	char *pszEnd = NULL;
525	uint64_t u64Address;
526	int rc = RTStrToUInt64Ex(psz, &pszEnd, 16, &u64Address);
527	RTGCUINTPTR Address = u64Address;
528	if ( RT_SUCCESS(rc)
529	&& (pszEnd == ' ' \|\| pszEnd == '\t')
530	&& Address == u64Address
531	&& u64Address != 0
532	&& u64Address != (RTGCUINTPTR)~0)
533	{
534	pszEnd++;
535	if ( RT_C_IS_ALPHA(*pszEnd)
536	&& (pszEnd[1] == ' ' \|\| pszEnd[1] == '\t'))
537	{
538	psz = dbgfR3Strip(pszEnd + 2);
539	if (*psz)
540	{
541	int rc2 = DBGFR3SymbolAdd(pVM, ModuleAddress, Address + AddressDelta, 0, psz);
542	if (RT_FAILURE(rc2))
543	Log2(("DBGFR3SymbolAdd(,, %RGv, 0, '%s') -> %Rrc\n", Address, psz, rc2));
544	}
545	}
546	}
547	}
548	return VINF_SUCCESS;
549	}
550
551	/**
552	* Tries to open the file using the image search paths.
553	*
554	* This is currently a quick hack and the only way to specifying the path is by setting
555	* VBOXDBG_IMAGE_PATH in the environment. It uses semicolon as separator everywhere.
556	*
557	* @returns VBox status code.
558	* @param pVM The VM handle.
559	* @param pszFilename The name of the file to locate and open.
560	* @param pszFound Where to return the actual filename.
561	* @param cchFound The buffer size.
562	* @param ppFile Where to return the opened file.
563	*/
564	int dbgfR3ModuleLocateAndOpen(PVM pVM, const char pszFilename, char pszFound, size_t cchFound, FILE **ppFile)
565	{
566	/* Check the filename length. */
567	size_t const cchFilename = strlen(pszFilename);
568	if (cchFilename >= cchFound)
569	return VERR_FILENAME_TOO_LONG;
570	const char *pszName = RTPathFilename(pszFilename);
571	if (!pszName)
572	return VERR_IS_A_DIRECTORY;
573	size_t const cchName = strlen(pszName);
574
575	/*
576	* Try default location first.
577	*/
578	memcpy(pszFound, pszFilename, cchFilename + 1);
579	FILE pFile = ppFile = fopen(pszFound, "rb");
580	if (pFile)
581	return VINF_SUCCESS;
582
583	/*
584	* Walk the search path.
585	*/
586	char *pszFreeMe = RTEnvDupEx(RTENV_DEFAULT, "VBOXDBG_IMAGE_PATH");
587	const char *psz = pszFreeMe ? pszFreeMe : ".";
588	while (*psz)
589	{
590	/* Skip leading blanks - no directories with leading spaces, thank you. */
591	while (RT_C_IS_BLANK(*psz))
592	psz++;
593
594	/* Fine the end of this element. */
595	const char *pszNext;
596	const char *pszEnd = strchr(psz, ';');
597	if (!pszEnd)
598	pszEnd = pszNext = strchr(psz, '\0');
599	else
600	pszNext = pszEnd + 1;
601	if (pszEnd != psz)
602	{
603	size_t const cch = pszEnd - psz;
604	if (cch + 1 + cchName < cchFound)
605	{
606	/** @todo RTPathCompose, RTPathComposeN(). This code isn't right
607	* for 'E:' on DOS systems. It may also create unwanted double slashes. */
608	memcpy(pszFound, psz, cch);
609	pszFound[cch] = '/';
610	memcpy(pszFound + cch + 1, pszName, cchName + 1);
611	*ppFile = pFile = fopen(pszFound, "rb");
612	if (pFile)
613	{
614	RTStrFree(pszFreeMe);
615	return VINF_SUCCESS;
616	}
617	}
618
619	/** @todo do a depth search using the specified path. */
620	}
621
622	/* advance */
623	psz = pszNext;
624	}
625
626	/* not found */
627	RTStrFree(pszFreeMe);
628	return VERR_OPEN_FAILED;
629	}
630
631
632	/**
633	* Load debug info, optionally related to a specific module.
634	*
635	* @returns VBox status.
636	* @param pVM VM Handle.
637	* @param pszFilename Path to the file containing the symbol information.
638	* This can be the executable image, a flat symbol file of some kind or stripped debug info.
639	* @param AddressDelta The value to add to the loaded symbols.
640	* @param pszName Short hand name for the module. If not related to a module specify NULL.
641	* @param ModuleAddress Address which the image is loaded at. This will be used to reference the module other places in the api.
642	* Ignored when pszName is NULL.
643	* @param cbImage Size of the image.
644	* Ignored when pszName is NULL.
645	*/
646	VMMR3DECL(int) DBGFR3ModuleLoad(PVM pVM, const char pszFilename, RTGCUINTPTR AddressDelta, const char pszName, RTGCUINTPTR ModuleAddress, unsigned cbImage)
647	{
648	/*
649	* Lazy init.
650	*/
651	if (!pVM->dbgf.s.fSymInited)
652	{
653	int rc = dbgfR3SymLazyInit(pVM);
654	if (RT_FAILURE(rc))
655	return rc;
656	}
657
658	/*
659	* Open the load file.
660	*/
661	FILE *pFile = NULL;
662	char szFoundFile[RTPATH_MAX];
663	int rc = dbgfR3ModuleLocateAndOpen(pVM, pszFilename, szFoundFile, sizeof(szFoundFile), &pFile);
664	if (pFile)
665	{
666	/*
667	* Probe the file type.
668	*/
669	SYMFILETYPE enmType = dbgfR3ModuleProbe(pFile);
670	if (enmType != SYMFILETYPE_UNKNOWN)
671	{
672	/*
673	* Add the module.
674	*/
675	if (pszName)
676	{
677	#ifdef HAVE_DBGHELP
678	/** @todo arg! checkout the inserting of modules and then loading them again.... Or just the module representation.... */
679	DWORD64 ImageBase = SymLoadModule64(pVM, NULL, (char )(void )szFoundFile, (char )(void )pszName, ModuleAddress, cbImage);
680	if (!ImageBase)
681	ImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszName, (char )(void )pszName, ModuleAddress, cbImage);
682	if (ImageBase)
683	{
684	AssertMsg(ModuleAddress == 0 \|\| ModuleAddress == ImageBase, ("ModuleAddres=%RGv ImageBase=%llx\n", ModuleAddress, ImageBase));
685	ModuleAddress = ImageBase;
686	}
687	else
688	rc = win32Error(pVM);
689	#else
690	rc = VERR_NOT_IMPLEMENTED;
691	#endif
692	}
693	if (RT_SUCCESS(rc))
694	{
695	/*
696	* Seek to the start of the file.
697	*/
698	rc = fseek(pFile, 0, SEEK_SET);
699	Assert(!rc);
700
701	/*
702	* Process the specific.
703	*/
704	switch (enmType)
705	{
706	case SYMFILETYPE_LINUX_SYSTEM_MAP:
707	rc = dbgfR3LoadLinuxSystemMap(pVM, pFile, ModuleAddress, AddressDelta);
708	break;
709
710	case SYMFILETYPE_PDB:
711	case SYMFILETYPE_DBG:
712	case SYMFILETYPE_MZ:
713	#ifdef HAVE_DBGHELP
714	/* done it all above! */
715	break;
716	#endif
717	case SYMFILETYPE_LD_MAP:
718	case SYMFILETYPE_MS_MAP:
719	case SYMFILETYPE_OBJDUMP:
720	case SYMFILETYPE_ELF:
721	rc = VERR_NOT_SUPPORTED;
722	break;
723
724	default:
725	AssertFailed();
726	rc = VERR_INTERNAL_ERROR;
727	break;
728	} /* file switch. */
729	} /* module added successfully. */
730	} /* format identified */
731	else
732	rc = VERR_NOT_SUPPORTED;
733	/** @todo check for read errors */
734	fclose(pFile);
735	}
736	return rc;
737	}
738
739
740	/**
741	* Interface used by PDMR3LdrRelocate for telling us that a GC module has been relocated.
742	*
743	* @param pVM The VM handle.
744	* @param OldImageBase The old image base.
745	* @param NewImageBase The new image base.
746	* @param cbImage The image size.
747	* @param pszFilename The image filename.
748	* @param pszName The module name.
749	*/
750	VMMR3DECL(void) DBGFR3ModuleRelocate(PVM pVM, RTGCUINTPTR OldImageBase, RTGCUINTPTR NewImageBase, RTGCUINTPTR cbImage,
751	const char pszFilename, const char pszName)
752	{
753	#ifdef HAVE_DBGHELP
754	if (pVM->dbgf.s.fSymInited)
755	{
756	if (!SymUnloadModule64(pVM, OldImageBase))
757	Log(("SymUnloadModule64(,%RGv) failed, lasterr=%d\n", OldImageBase, GetLastError()));
758
759	DWORD ImageSize = (DWORD)cbImage; Assert(ImageSize == cbImage);
760	DWORD64 LoadedImageBase = SymLoadModule64(pVM, NULL, (char )(void )pszFilename, (char )(void )pszName, NewImageBase, ImageSize);
761	if (!LoadedImageBase)
762	Log(("SymLoadModule64(,,%s,,) -> lasterr=%d (relocate)\n", pszFilename, GetLastError()));
763	else
764	Log(("Reloaded debuginfo for %s - %s %llx\n", pszName, pszFilename, LoadedImageBase));
765	}
766	#else
767
768	#endif
769	}
770
771
772	/**
773	* Adds a symbol to the debug info manager.
774	*
775	* @returns VBox status.
776	* @param pVM VM Handle.
777	* @param ModuleAddress Module address. Use 0 if no module.
778	* @param SymbolAddress Symbol address
779	* @param cbSymbol Size of the symbol. Use 0 if info not available.
780	* @param pszSymbol Symbol name.
781	*/
782	VMMR3DECL(int) DBGFR3SymbolAdd(PVM pVM, RTGCUINTPTR ModuleAddress, RTGCUINTPTR SymbolAddress, RTUINT cbSymbol, const char *pszSymbol)
783	{
784	/*
785	* Validate.
786	*/
787	if (!pszSymbol \|\| !*pszSymbol)
788	{
789	AssertMsgFailed(("No symbol name!\n"));
790	return VERR_INVALID_PARAMETER;
791	}
792
793	/*
794	* Lazy init.
795	*/
796	if (!pVM->dbgf.s.fSymInited)
797	{
798	int rc = dbgfR3SymLazyInit(pVM);
799	if (RT_FAILURE(rc))
800	return rc;
801	}
802
803	#ifdef HAVE_DBGHELP
804	if (SymAddSymbol(pVM, ModuleAddress, (char )(void )pszSymbol, SymbolAddress, cbSymbol, 0))
805	return VINF_SUCCESS;
806	return win32Error(pVM);
807	#else
808	/** @todo module lookup. */
809	return dbgfR3SymbolInsert(pVM, pszSymbol, SymbolAddress, cbSymbol, NULL);
810	#endif
811	}
812
813
814	/**
815	* Find symbol by address (nearest).
816	*
817	* @returns VBox status.
818	* @param pVM VM handle.
819	* @param Address Address.
820	* @param poffDisplacement Where to store the symbol displacement from Address.
821	* @param pSymbol Where to store the symbol info.
822	*/
823	VMMR3DECL(int) DBGFR3SymbolByAddr(PVM pVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement, PDBGFSYMBOL pSymbol)
824	{
825	/*
826	* Lazy init.
827	*/
828	if (!pVM->dbgf.s.fSymInited)
829	{
830	int rc = dbgfR3SymLazyInit(pVM);
831	if (RT_FAILURE(rc))
832	return rc;
833	}
834
835	/*
836	* Look it up.
837	*/
838	#ifdef HAVE_DBGHELP
839	char achBuffer[sizeof(IMAGEHLP_SYMBOL64) + DBGF_SYMBOL_NAME_LENGTH * sizeof(TCHAR) + sizeof(ULONG64)];
840	PIMAGEHLP_SYMBOL64 pSym = (PIMAGEHLP_SYMBOL64)&achBuffer[0];
841	pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
842	pSym->MaxNameLength = DBGF_SYMBOL_NAME_LENGTH;
843
844	if (SymGetSymFromAddr64(pVM, Address, (PDWORD64)poffDisplacement, pSym))
845	{
846	pSymbol->Value = (RTGCUINTPTR)pSym->Address;
847	pSymbol->cb = pSym->Size;
848	pSymbol->fFlags = pSym->Flags;
849	strcpy(pSymbol->szName, pSym->Name);
850	return VINF_SUCCESS;
851	}
852	//return win32Error(pVM);
853
854	#else
855
856	PDBGFSYM pSym = dbgfR3SymbolGetAddr(pVM, Address);
857	if (pSym)
858	{
859	pSymbol->Value = pSym->Core.Key;
860	pSymbol->cb = pSym->Core.KeyLast - pSym->Core.Key + 1;
861	pSymbol->fFlags = 0;
862	pSymbol->szName[0] = '\0';
863	strncat(pSymbol->szName, pSym->szName, sizeof(pSymbol->szName) - 1);
864	if (poffDisplacement)
865	*poffDisplacement = Address - pSymbol->Value;
866	return VINF_SUCCESS;
867	}
868
869	#endif
870
871	/*
872	* Try PDM.
873	*/
874	if (MMHyperIsInsideArea(pVM, Address))
875	{
876	char szModName[64];
877	RTRCPTR RCPtrMod;
878	char szNearSym1[260];
879	RTRCPTR RCPtrNearSym1;
880	char szNearSym2[260];
881	RTRCPTR RCPtrNearSym2;
882	int rc = PDMR3LdrQueryRCModFromPC(pVM, Address,
883	&szModName[0], sizeof(szModName), &RCPtrMod,
884	&szNearSym1[0], sizeof(szNearSym1), &RCPtrNearSym1,
885	&szNearSym2[0], sizeof(szNearSym2), &RCPtrNearSym2);
886	if (RT_SUCCESS(rc) && szNearSym1[0])
887	{
888	pSymbol->Value = RCPtrNearSym1;
889	pSymbol->cb = RCPtrNearSym2 > RCPtrNearSym1 ? RCPtrNearSym2 - RCPtrNearSym1 : 0;
890	pSymbol->fFlags = 0;
891	pSymbol->szName[0] = '\0';
892	strncat(pSymbol->szName, szNearSym1, sizeof(pSymbol->szName) - 1);
893	if (poffDisplacement)
894	*poffDisplacement = Address - pSymbol->Value;
895	return VINF_SUCCESS;
896	}
897	}
898
899	return VERR_SYMBOL_NOT_FOUND;
900	}
901
902
903	/**
904	* Find symbol by name (first).
905	*
906	* @returns VBox status.
907	* @param pVM VM handle.
908	* @param pszSymbol Symbol name.
909	* @param pSymbol Where to store the symbol info.
910	*/
911	VMMR3DECL(int) DBGFR3SymbolByName(PVM pVM, const char *pszSymbol, PDBGFSYMBOL pSymbol)
912	{
913	/*
914	* Lazy init.
915	*/
916	if (!pVM->dbgf.s.fSymInited)
917	{
918	int rc = dbgfR3SymLazyInit(pVM);
919	if (RT_FAILURE(rc))
920	return rc;
921	}
922
923	/*
924	* Look it up.
925	*/
926	#ifdef HAVE_DBGHELP
927	char achBuffer[sizeof(IMAGEHLP_SYMBOL64) + DBGF_SYMBOL_NAME_LENGTH * sizeof(TCHAR) + sizeof(ULONG64)];
928	PIMAGEHLP_SYMBOL64 pSym = (PIMAGEHLP_SYMBOL64)&achBuffer[0];
929	pSym->SizeOfStruct = sizeof(IMAGEHLP_SYMBOL64);
930	pSym->MaxNameLength = DBGF_SYMBOL_NAME_LENGTH;
931
932	if (SymGetSymFromName64(pVM, (char )(void )pszSymbol, pSym))
933	{
934	pSymbol->Value = (RTGCUINTPTR)pSym->Address;
935	pSymbol->cb = pSym->Size;
936	pSymbol->fFlags = pSym->Flags;
937	strcpy(pSymbol->szName, pSym->Name);
938	return VINF_SUCCESS;
939	}
940	return win32Error(pVM);
941	#else
942
943	PDBGFSYM pSym = dbgfR3SymbolGetName(pVM, pszSymbol);
944	if (pSym)
945	{
946	pSymbol->Value = pSym->Core.Key;
947	pSymbol->cb = pSym->Core.KeyLast - pSym->Core.Key + 1;
948	pSymbol->fFlags = 0;
949	pSymbol->szName[0] = '\0';
950	strncat(pSymbol->szName, pSym->szName, sizeof(pSymbol->szName) - 1);
951	return VINF_SUCCESS;
952	}
953
954	return VERR_SYMBOL_NOT_FOUND;
955	#endif
956	}
957
958
959	/**
960	* Find line by address (nearest).
961	*
962	* @returns VBox status.
963	* @param pVM VM handle.
964	* @param Address Address.
965	* @param poffDisplacement Where to store the line displacement from Address.
966	* @param pLine Where to store the line info.
967	*/
968	VMMR3DECL(int) DBGFR3LineByAddr(PVM pVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement, PDBGFLINE pLine)
969	{
970	/*
971	* Lazy init.
972	*/
973	if (!pVM->dbgf.s.fSymInited)
974	{
975	int rc = dbgfR3SymLazyInit(pVM);
976	if (RT_FAILURE(rc))
977	return rc;
978	}
979
980	/*
981	* Look it up.
982	*/
983	#ifdef HAVE_DBGHELP
984	IMAGEHLP_LINE64 Line = {0};
985	DWORD off = 0;
986	Line.SizeOfStruct = sizeof(IMAGEHLP_LINE64);
987	if (SymGetLineFromAddr64(pVM, Address, &off, &Line))
988	{
989	if (poffDisplacement)
990	*poffDisplacement = (long)off;
991	pLine->Address = (RTGCUINTPTR)Line.Address;
992	pLine->uLineNo = Line.LineNumber;
993	pLine->szFilename[0] = '\0';
994	strncat(pLine->szFilename, Line.FileName, sizeof(pLine->szFilename));
995	return VINF_SUCCESS;
996	}
997	return win32Error(pVM);
998	#else
999	return VERR_NOT_IMPLEMENTED;
1000	#endif
1001	}
1002
1003
1004	/**
1005	* Duplicates a line.
1006	*
1007	* @returns VBox status code.
1008	* @param pVM The VM handle.
1009	* @param pLine The line to duplicate.
1010	*/
1011	static PDBGFLINE dbgfR3LineDup(PVM pVM, PCDBGFLINE pLine)
1012	{
1013	size_t cb = strlen(pLine->szFilename) + RT_OFFSETOF(DBGFLINE, szFilename[1]);
1014	PDBGFLINE pDup = (PDBGFLINE)MMR3HeapAlloc(pVM, MM_TAG_DBGF_LINE_DUP, cb);
1015	if (pDup)
1016	memcpy(pDup, pLine, cb);
1017	return pDup;
1018	}
1019
1020
1021	/**
1022	* Find line by address (nearest), allocate return buffer.
1023	*
1024	* @returns Pointer to the line. Must be freed using DBGFR3LineFree().
1025	* @returns NULL if the line was not found or if we're out of memory.
1026	* @param pVM VM handle.
1027	* @param Address Address.
1028	* @param poffDisplacement Where to store the line displacement from Address.
1029	*/
1030	VMMR3DECL(PDBGFLINE) DBGFR3LineByAddrAlloc(PVM pVM, RTGCUINTPTR Address, PRTGCINTPTR poffDisplacement)
1031	{
1032	DBGFLINE Line;
1033	int rc = DBGFR3LineByAddr(pVM, Address, poffDisplacement, &Line);
1034	if (RT_FAILURE(rc))
1035	return NULL;
1036	return dbgfR3LineDup(pVM, &Line);
1037	}
1038
1039
1040	/**
1041	* Frees a line returned by DBGFR3LineByAddressAlloc().
1042	*
1043	* @param pLine Pointer to the line.
1044	*/
1045	VMMR3DECL(void) DBGFR3LineFree(PDBGFLINE pLine)
1046	{
1047	if (pLine)
1048	MMR3HeapFree(pLine);
1049	}
1050
1051
1052	#ifdef HAVE_DBGHELP
1053
1054	//static BOOL CALLBACK win32EnumModulesCallback(PSTR ModuleName, DWORD64 BaseOfDll, PVOID UserContext)
1055	//{
1056	// Log(("dbg: module: %08llx %s\n", ModuleName, BaseOfDll));
1057	// return TRUE;
1058	//}
1059
1060	static int win32Error(PVM pVM)
1061	{
1062	int rc = GetLastError();
1063	Log(("Lasterror=%d\n", rc));
1064
1065	//SymEnumerateModules64(pVM, win32EnumModulesCallback, NULL);
1066
1067	return VERR_GENERAL_FAILURE;
1068	}
1069	#endif
1070

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source: vbox/trunk/src/VBox/VMM/DBGFSym.cpp@ 26173

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