coredumper-solaris.cpp@ 43685

Last change on this file since 43685 was 43685, checked in by vboxsync, 12 years ago
Solaris/coredumper: doxygen.
Property svn:eol-style set to `native` Property svn:keywords set to `Id`
File size: 81.1 KB

Line
1	/* $Id: coredumper-solaris.cpp 43685 2012-10-18 17:21:18Z vboxsync $ */
2	/** @file
3	* IPRT - Custom Core Dumper, Solaris.
4	*/
5
6	/*
7	* Copyright (C) 2010-2011 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	* The contents of this file may alternatively be used under the terms
18	* of the Common Development and Distribution License Version 1.0
19	* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
20	* VirtualBox OSE distribution, in which case the provisions of the
21	* CDDL are applicable instead of those of the GPL.
22	*
23	* You may elect to license modified versions of this file under the
24	* terms and conditions of either the GPL or the CDDL or both.
25	*/
26
27
28	/*******************************************************************************
29	* Header Files *
30	*******************************************************************************/
31	#define LOG_GROUP RTLOGGROUP_DEFAULT
32	#include <iprt/coredumper.h>
33
34	#include <iprt/asm.h>
35	#include <iprt/dir.h>
36	#include <iprt/err.h>
37	#include <iprt/log.h>
38	#include <iprt/param.h>
39	#include <iprt/path.h>
40	#include <iprt/process.h>
41	#include <iprt/string.h>
42	#include <iprt/thread.h>
43	#include "coredumper-solaris.h"
44
45	#ifdef RT_OS_SOLARIS
46	# include <syslog.h>
47	# include <signal.h>
48	# include <stdlib.h>
49	# include <unistd.h>
50	# include <errno.h>
51	# include <zone.h>
52	# include <sys/proc.h>
53	# include <sys/sysmacros.h>
54	# include <sys/systeminfo.h>
55	# include <sys/mman.h>
56	# include <sys/types.h>
57	# include <sys/stat.h>
58	# include <fcntl.h>
59	# include <ucontext.h>
60	#endif /* RT_OS_SOLARIS */
61
62	#include "internal/ldrELF.h"
63	#include "internal/ldrELF64.h"
64
65
66	/*******************************************************************************
67	* Globals *
68	*******************************************************************************/
69	static RTNATIVETHREAD volatile g_CoreDumpThread = NIL_RTNATIVETHREAD;
70	static bool volatile g_fCoreDumpSignalSetup = false;
71	static uint32_t volatile g_fCoreDumpFlags = 0;
72	static char g_szCoreDumpDir[PATH_MAX] = { 0 };
73	static char g_szCoreDumpFile[PATH_MAX] = { 0 };
74
75
76	/*******************************************************************************
77	* Defined Constants And Macros *
78	*******************************************************************************/
79	#define CORELOG_NAME "CoreDumper: "
80	#define CORELOG(a) Log(a)
81	#define CORELOGRELSYS(a) \
82	do { \
83	rtCoreDumperSysLogWrapper a; \
84	} while (0)
85
86
87	/**
88	* ELFNOTEHDR: ELF NOTE header.
89	*/
90	typedef struct ELFNOTEHDR
91	{
92	Elf64_Nhdr Hdr; /* Header of NOTE section */
93	char achName[8]; /* Name of NOTE section */
94	} ELFNOTEHDR;
95	typedef ELFNOTEHDR *PELFNOTEHDR;
96
97	/**
98	* Wrapper function to write IPRT format style string to the syslog.
99	*
100	* @param pszFormat Format string
101	*/
102	static void rtCoreDumperSysLogWrapper(const char *pszFormat, ...)
103	{
104	va_list va;
105	va_start(va, pszFormat);
106	char szBuf[1024];
107	RTStrPrintfV(szBuf, sizeof(szBuf), pszFormat, va);
108	va_end(va);
109	syslog(LOG_ERR, "%s", szBuf);
110	}
111
112
113	/**
114	* Determines endianness of the system. Just for completeness.
115	*
116	* @return Will return false if system is little endian, true otherwise.
117	*/
118	static bool IsBigEndian()
119	{
120	const int i = 1;
121	char p = (char )&i;
122	if (p[0] == 1)
123	return false;
124	return true;
125	}
126
127
128	/**
129	* Reads from a file making sure an interruption doesn't cause a failure.
130	*
131	* @param fd Handle to the file to read.
132	* @param pv Where to store the read data.
133	* @param cbToRead Size of data to read.
134	*
135	* @return IPRT status code.
136	*/
137	static int ReadFileNoIntr(int fd, void *pv, size_t cbToRead)
138	{
139	for (;;)
140	{
141	ssize_t cbRead = read(fd, pv, cbToRead);
142	if (cbRead < 0)
143	{
144	if (errno == EINTR)
145	continue;
146	return RTErrConvertFromErrno(errno);
147	}
148	if ((size_t)cbRead == cbToRead)
149	return VINF_SUCCESS;
150	if ((size_t)cbRead > cbToRead)
151	return VERR_INTERNAL_ERROR_3;
152	if (cbRead == 0)
153	return VERR_EOF;
154	pv = (uint8_t *)pv + cbRead;
155	cbToRead -= cbRead;
156	}
157	}
158
159
160	/**
161	* Writes to a file making sure an interruption doesn't cause a failure.
162	*
163	* @param fd Handle to the file to write to.
164	* @param pv Pointer to what to write.
165	* @param cbToWrite Size of data to write.
166	*
167	* @return IPRT status code.
168	*/
169	static int WriteFileNoIntr(int fd, const void *pv, size_t cbToWrite)
170	{
171	for (;;)
172	{
173	ssize_t cbWritten = write(fd, pv, cbToWrite);
174	if (cbWritten < 0)
175	{
176	if (errno == EINTR)
177	continue;
178	return RTErrConvertFromErrno(errno);
179	}
180	if ((size_t)cbWritten == cbToWrite)
181	return VINF_SUCCESS;
182	if ((size_t)cbWritten > cbToWrite)
183	return VERR_INTERNAL_ERROR_2;
184	pv = (uint8_t const *)pv + cbWritten;
185	cbToWrite -= cbWritten;
186	}
187	}
188
189
190	/**
191	* Read from a given offset in the process' address space.
192	*
193	* @param pSolProc Pointer to the solaris process.
194	* @param off The offset to read from.
195	* @param pvBuf Where to read the data into.
196	* @param cbToRead Number of bytes to read.
197	*
198	* @return VINF_SUCCESS, if all the given bytes was read in, otherwise VERR_READ_ERROR.
199	*/
200	static ssize_t ProcReadAddrSpace(PRTSOLCOREPROCESS pSolProc, RTFOFF off, void *pvBuf, size_t cbToRead)
201	{
202	for (;;)
203	{
204	ssize_t cbRead = pread(pSolProc->fdAs, pvBuf, cbToRead, off);
205	if (cbRead < 0)
206	{
207	if (errno == EINTR)
208	continue;
209	return RTErrConvertFromErrno(errno);
210	}
211	if ((size_t)cbRead == cbToRead)
212	return VINF_SUCCESS;
213	if ((size_t)cbRead > cbToRead)
214	return VERR_INTERNAL_ERROR_4;
215	if (cbRead == 0)
216	return VERR_EOF;
217
218	pvBuf = (uint8_t *)pvBuf + cbRead;
219	cbToRead -= cbRead;
220	off += cbRead;
221	}
222	}
223
224
225	/**
226	* Determines if the current process' architecture is suitable for dumping core.
227	*
228	* @param pSolProc Pointer to the solaris process.
229	*
230	* @return true if the architecture matches the current one.
231	*/
232	static inline bool IsProcessArchNative(PRTSOLCOREPROCESS pSolProc)
233	{
234	return pSolProc->ProcInfo.pr_dmodel == PR_MODEL_NATIVE;
235	}
236
237
238	/**
239	* Helper function to get the size_t compatible file size from a file
240	* descriptor.
241	*
242	* @return The file size (in bytes).
243	* @param fd The file descriptor.
244	*/
245	static size_t GetFileSizeByFd(int fd)
246	{
247	struct stat st;
248	if (fstat(fd, &st) == 0)
249	{
250	if (st.st_size <= 0)
251	return 0;
252	size_t cbFile = (size_t)st.st_size;
253	return (off_t)cbFile == st.st_size ? cbFile : ~(size_t)0;
254	}
255
256	CORELOGRELSYS((CORELOG_NAME "GetFileSizeByFd: fstat failed rc=%Rrc\n", RTErrConvertFromErrno(errno)));
257	return 0;
258	}
259
260
261	/**
262	* Helper function to get the size_t compatible size of a file given its path.
263	*
264	* @return The file size (in bytes).
265	* @param pszPath Pointer to the full path of the file.
266	*/
267	static size_t GetFileSizeByName(const char *pszPath)
268	{
269	int fd = open(pszPath, O_RDONLY);
270	if (fd < 0)
271	{
272	CORELOGRELSYS((CORELOG_NAME "GetFileSizeByName: failed to open %s rc=%Rrc\n", pszPath, RTErrConvertFromErrno(errno)));
273	return 0;
274	}
275
276	size_t cb = GetFileSizeByFd(fd);
277	close(fd);
278	return cb;
279	}
280
281
282	/**
283	* Pre-compute and pre-allocate sufficient memory for dumping core.
284	* This is meant to be called once, as a single-large anonymously
285	* mapped memory area which will be used during the core dumping routines.
286	*
287	* @param pSolCore Pointer to the core object.
288	*
289	* @return IPRT status code.
290	*/
291	static int AllocMemoryArea(PRTSOLCORE pSolCore)
292	{
293	AssertReturn(pSolCore->pvCore == NULL, VERR_ALREADY_EXISTS);
294
295	static struct
296	{
297	const char pszFilePath; / Proc based path */
298	size_t cbHeader; /* Size of header */
299	size_t cbEntry; /* Size of each entry in file */
300	size_t cbAccounting; /* Size of each accounting entry per entry */
301	} const s_aPreAllocTable[] =
302	{
303	{ "/proc/%d/map", 0, sizeof(prmap_t), sizeof(RTSOLCOREMAPINFO) },
304	{ "/proc/%d/auxv", 0, 0, 0 },
305	{ "/proc/%d/lpsinfo", sizeof(prheader_t), sizeof(lwpsinfo_t), sizeof(RTSOLCORETHREADINFO) },
306	{ "/proc/%d/lstatus", 0, 0, 0 },
307	{ "/proc/%d/ldt", 0, 0, 0 },
308	{ "/proc/%d/cred", sizeof(prcred_t), sizeof(gid_t), 0 },
309	{ "/proc/%d/priv", sizeof(prpriv_t), sizeof(priv_chunk_t), 0 },
310	};
311
312	size_t cb = 0;
313	for (unsigned i = 0; i < RT_ELEMENTS(s_aPreAllocTable); i++)
314	{
315	char szPath[PATH_MAX];
316	RTStrPrintf(szPath, sizeof(szPath), s_aPreAllocTable[i].pszFilePath, (int)pSolCore->SolProc.Process);
317	size_t cbFile = GetFileSizeByName(szPath);
318	cb += cbFile;
319	if ( cbFile > 0
320	&& s_aPreAllocTable[i].cbEntry > 0)
321	{
322	cb += ((cbFile - s_aPreAllocTable[i].cbHeader) / s_aPreAllocTable[i].cbEntry)
323	* (s_aPreAllocTable[i].cbAccounting > 0 ? s_aPreAllocTable[i].cbAccounting : 1);
324	cb += s_aPreAllocTable[i].cbHeader;
325	}
326	}
327
328	/*
329	* Make room for our own mapping accountant entry which will also be included in the core.
330	*/
331	cb += sizeof(RTSOLCOREMAPINFO);
332
333	/*
334	* Allocate the required space, plus some extra room.
335	*/
336	cb += _128K;
337	void pv = mmap(NULL, cb, PROT_READ \| PROT_WRITE, MAP_PRIVATE \| MAP_ANON, -1 / fd /, 0 / offset */);
338	if (pv != MAP_FAILED)
339	{
340	CORELOG((CORELOG_NAME "AllocMemoryArea: memory area of %u bytes allocated.\n", cb));
341	pSolCore->pvCore = pv;
342	pSolCore->pvFree = pv;
343	pSolCore->cbCore = cb;
344	return VINF_SUCCESS;
345	}
346	CORELOGRELSYS((CORELOG_NAME "AllocMemoryArea: failed cb=%u\n", cb));
347	return VERR_NO_MEMORY;
348	}
349
350
351	/**
352	* Free memory area used by the core object.
353	*
354	* @param pSolCore Pointer to the core object.
355	*/
356	static void FreeMemoryArea(PRTSOLCORE pSolCore)
357	{
358	AssertReturnVoid(pSolCore);
359	AssertReturnVoid(pSolCore->pvCore);
360	AssertReturnVoid(pSolCore->cbCore > 0);
361
362	munmap(pSolCore->pvCore, pSolCore->cbCore);
363	CORELOG((CORELOG_NAME "FreeMemoryArea: memory area of %u bytes freed.\n", pSolCore->cbCore));
364
365	pSolCore->pvCore = NULL;
366	pSolCore->pvFree= NULL;
367	pSolCore->cbCore = 0;
368	}
369
370
371	/**
372	* Get a chunk from the area of allocated memory.
373	*
374	* @param pSolCore Pointer to the core object.
375	* @param cb Size of requested chunk.
376	*
377	* @return Pointer to allocated memory, or NULL on failure.
378	*/
379	static void *GetMemoryChunk(PRTSOLCORE pSolCore, size_t cb)
380	{
381	AssertReturn(pSolCore, NULL);
382	AssertReturn(pSolCore->pvCore, NULL);
383	AssertReturn(pSolCore->pvFree, NULL);
384
385	size_t cbAllocated = (char )pSolCore->pvFree - (char )pSolCore->pvCore;
386	if (cbAllocated < pSolCore->cbCore)
387	{
388	char pb = (char )pSolCore->pvFree;
389	pSolCore->pvFree = pb + cb;
390	return pb;
391	}
392
393	return NULL;
394	}
395
396
397	/**
398	* Reads the proc file's content into a newly allocated buffer.
399	*
400	* @param pSolCore Pointer to the core object.
401	* @param pszFileFmt Only the name of the file to read from (/proc/<pid> will be prepended)
402	* @param ppv Where to store the allocated buffer.
403	* @param pcb Where to store size of the buffer.
404	*
405	* @return IPRT status code. If the proc file is 0 bytes, VINF_SUCCESS is
406	* returned with pointed to values of @c ppv, @c pcb set to NULL and 0
407	* respectively.
408	*/
409	static int ProcReadFileInto(PRTSOLCORE pSolCore, const char pszProcFileName, void ppv, size_t pcb)
410	{
411	AssertReturn(pSolCore, VERR_INVALID_POINTER);
412
413	char szPath[PATH_MAX];
414	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/%s", (int)pSolCore->SolProc.Process, pszProcFileName);
415	int rc = VINF_SUCCESS;
416	int fd = open(szPath, O_RDONLY);
417	if (fd >= 0)
418	{
419	*pcb = GetFileSizeByFd(fd);
420	if (*pcb > 0)
421	{
422	ppv = GetMemoryChunk(pSolCore, pcb);
423	if (*ppv)
424	rc = ReadFileNoIntr(fd, ppv, pcb);
425	else
426	rc = VERR_NO_MEMORY;
427	}
428	else
429	{
430	*pcb = 0;
431	*ppv = NULL;
432	rc = VINF_SUCCESS;
433	}
434	close(fd);
435	}
436	else
437	{
438	rc = RTErrConvertFromErrno(fd);
439	CORELOGRELSYS((CORELOG_NAME "ProcReadFileInto: failed to open %s. rc=%Rrc\n", szPath, rc));
440	}
441	return rc;
442	}
443
444
445	/**
446	* Read process information (format psinfo_t) from /proc.
447	*
448	* @param pSolCore Pointer to the core object.
449	*
450	* @return IPRT status code.
451	*/
452	static int ProcReadInfo(PRTSOLCORE pSolCore)
453	{
454	AssertReturn(pSolCore, VERR_INVALID_POINTER);
455
456	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
457	char szPath[PATH_MAX];
458	int rc = VINF_SUCCESS;
459
460	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/psinfo", (int)pSolProc->Process);
461	int fd = open(szPath, O_RDONLY);
462	if (fd >= 0)
463	{
464	size_t cbProcInfo = sizeof(psinfo_t);
465	rc = ReadFileNoIntr(fd, &pSolProc->ProcInfo, cbProcInfo);
466	close(fd);
467	}
468	else
469	{
470	rc = RTErrConvertFromErrno(fd);
471	CORELOGRELSYS((CORELOG_NAME "ProcReadInfo: failed to open %s. rc=%Rrc\n", szPath, rc));
472	}
473
474	return rc;
475	}
476
477
478	/**
479	* Read process status (format pstatus_t) from /proc.
480	*
481	* @param pSolCore Pointer to the core object.
482	*
483	* @return IPRT status code.
484	*/
485	static int ProcReadStatus(PRTSOLCORE pSolCore)
486	{
487	AssertReturn(pSolCore, VERR_INVALID_POINTER);
488
489	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
490
491	char szPath[PATH_MAX];
492	int rc = VINF_SUCCESS;
493
494	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/status", (int)pSolProc->Process);
495	int fd = open(szPath, O_RDONLY);
496	if (fd >= 0)
497	{
498	size_t cbProcStatus = sizeof(pstatus_t);
499	AssertCompile(sizeof(pstatus_t) == sizeof(pSolProc->ProcStatus));
500	rc = ReadFileNoIntr(fd, &pSolProc->ProcStatus, cbProcStatus);
501	close(fd);
502	}
503	else
504	{
505	rc = RTErrConvertFromErrno(fd);
506	CORELOGRELSYS((CORELOG_NAME "ProcReadStatus: failed to open %s. rc=%Rrc\n", szPath, rc));
507	}
508	return rc;
509	}
510
511
512	/**
513	* Read process credential information (format prcred_t + array of guid_t)
514	*
515	* @param pSolCore Pointer to the core object.
516	*
517	* @remarks Should not be called before successful call to @see AllocMemoryArea()
518	* @return IPRT status code.
519	*/
520	static int ProcReadCred(PRTSOLCORE pSolCore)
521	{
522	AssertReturn(pSolCore, VERR_INVALID_POINTER);
523
524	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
525	return ProcReadFileInto(pSolCore, "cred", &pSolProc->pvCred, &pSolProc->cbCred);
526	}
527
528
529	/**
530	* Read process privilege information (format prpriv_t + array of priv_chunk_t)
531	*
532	* @param pSolCore Pointer to the core object.
533	*
534	* @remarks Should not be called before successful call to @see AllocMemoryArea()
535	* @return IPRT status code.
536	*/
537	static int ProcReadPriv(PRTSOLCORE pSolCore)
538	{
539	AssertReturn(pSolCore, VERR_INVALID_POINTER);
540
541	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
542	int rc = ProcReadFileInto(pSolCore, "priv", (void **)&pSolProc->pPriv, &pSolProc->cbPriv);
543	if (RT_FAILURE(rc))
544	return rc;
545	pSolProc->pcPrivImpl = getprivimplinfo();
546	if (!pSolProc->pcPrivImpl)
547	{
548	CORELOGRELSYS((CORELOG_NAME "ProcReadPriv: getprivimplinfo returned NULL.\n"));
549	return VERR_INVALID_STATE;
550	}
551	return rc;
552	}
553
554
555	/**
556	* Read process LDT information (format array of struct ssd) from /proc.
557	*
558	* @param pSolProc Pointer to the core object.
559	*
560	* @remarks Should not be called before successful call to @see AllocMemoryArea()
561	* @return IPRT status code.
562	*/
563	static int ProcReadLdt(PRTSOLCORE pSolCore)
564	{
565	AssertReturn(pSolCore, VERR_INVALID_POINTER);
566
567	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
568	return ProcReadFileInto(pSolCore, "ldt", &pSolProc->pvLdt, &pSolProc->cbLdt);
569	}
570
571
572	/**
573	* Read process auxiliary vectors (format auxv_t) for the process.
574	*
575	* @param pSolCore Pointer to the core object.
576	*
577	* @remarks Should not be called before successful call to @see AllocMemoryArea()
578	* @return IPRT status code.
579	*/
580	static int ProcReadAuxVecs(PRTSOLCORE pSolCore)
581	{
582	AssertReturn(pSolCore, VERR_INVALID_POINTER);
583
584	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
585	char szPath[PATH_MAX];
586	int rc = VINF_SUCCESS;
587	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/auxv", (int)pSolProc->Process);
588	int fd = open(szPath, O_RDONLY);
589	if (fd < 0)
590	{
591	rc = RTErrConvertFromErrno(fd);
592	CORELOGRELSYS((CORELOG_NAME "ProcReadAuxVecs: failed to open %s rc=%Rrc\n", szPath, rc));
593	return rc;
594	}
595
596	size_t cbAuxFile = GetFileSizeByFd(fd);
597	if (cbAuxFile >= sizeof(auxv_t))
598	{
599	pSolProc->pAuxVecs = (auxv_t*)GetMemoryChunk(pSolCore, cbAuxFile + sizeof(auxv_t));
600	if (pSolProc->pAuxVecs)
601	{
602	rc = ReadFileNoIntr(fd, pSolProc->pAuxVecs, cbAuxFile);
603	if (RT_SUCCESS(rc))
604	{
605	/* Terminate list of vectors */
606	pSolProc->cAuxVecs = cbAuxFile / sizeof(auxv_t);
607	CORELOG((CORELOG_NAME "ProcReadAuxVecs: cbAuxFile=%u auxv_t size %d cAuxVecs=%u\n", cbAuxFile, sizeof(auxv_t),
608	pSolProc->cAuxVecs));
609	if (pSolProc->cAuxVecs > 0)
610	{
611	pSolProc->pAuxVecs[pSolProc->cAuxVecs].a_type = AT_NULL;
612	pSolProc->pAuxVecs[pSolProc->cAuxVecs].a_un.a_val = 0L;
613	close(fd);
614	return VINF_SUCCESS;
615	}
616
617	CORELOGRELSYS((CORELOG_NAME "ProcReadAuxVecs: Invalid vector count %u\n", pSolProc->cAuxVecs));
618	rc = VERR_READ_ERROR;
619	}
620	else
621	CORELOGRELSYS((CORELOG_NAME "ProcReadAuxVecs: ReadFileNoIntr failed. rc=%Rrc cbAuxFile=%u\n", rc, cbAuxFile));
622
623	pSolProc->pAuxVecs = NULL;
624	pSolProc->cAuxVecs = 0;
625	}
626	else
627	{
628	CORELOGRELSYS((CORELOG_NAME "ProcReadAuxVecs: no memory for %u bytes\n", cbAuxFile + sizeof(auxv_t)));
629	rc = VERR_NO_MEMORY;
630	}
631	}
632	else
633	{
634	CORELOGRELSYS((CORELOG_NAME "ProcReadAuxVecs: aux file too small %u, expecting %u or more\n", cbAuxFile, sizeof(auxv_t)));
635	rc = VERR_READ_ERROR;
636	}
637
638	close(fd);
639	return rc;
640	}
641
642
643	/*
644	* Find an element in the process' auxiliary vector.
645	*/
646	static long GetAuxVal(PRTSOLCOREPROCESS pSolProc, int Type)
647	{
648	AssertReturn(pSolProc, -1);
649	if (pSolProc->pAuxVecs)
650	{
651	auxv_t *pAuxVec = pSolProc->pAuxVecs;
652	for (; pAuxVec->a_type != AT_NULL; pAuxVec++)
653	{
654	if (pAuxVec->a_type == Type)
655	return pAuxVec->a_un.a_val;
656	}
657	}
658	return -1;
659	}
660
661
662	/**
663	* Read the process mappings (format prmap_t array).
664	*
665	* @param pSolCore Pointer to the core object.
666	*
667	* @remarks Should not be called before successful call to @see AllocMemoryArea()
668	* @return IPRT status code.
669	*/
670	static int ProcReadMappings(PRTSOLCORE pSolCore)
671	{
672	AssertReturn(pSolCore, VERR_INVALID_POINTER);
673
674	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
675	char szPath[PATH_MAX];
676	int rc = VINF_SUCCESS;
677	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/map", (int)pSolProc->Process);
678	int fdMap = open(szPath, O_RDONLY);
679	if (fdMap < 0)
680	{
681	rc = RTErrConvertFromErrno(errno);
682	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: failed to open %s. rc=%Rrc\n", szPath, rc));
683	return rc;
684	}
685
686	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/as", (int)pSolProc->Process);
687	pSolProc->fdAs = open(szPath, O_RDONLY);
688	if (pSolProc->fdAs >= 0)
689	{
690	/*
691	* Allocate and read all the prmap_t objects from proc.
692	*/
693	size_t cbMapFile = GetFileSizeByFd(fdMap);
694	if (cbMapFile >= sizeof(prmap_t))
695	{
696	prmap_t pMap = (prmap_t)GetMemoryChunk(pSolCore, cbMapFile);
697	if (pMap)
698	{
699	rc = ReadFileNoIntr(fdMap, pMap, cbMapFile);
700	if (RT_SUCCESS(rc))
701	{
702	pSolProc->cMappings = cbMapFile / sizeof(prmap_t);
703	if (pSolProc->cMappings > 0)
704	{
705	/*
706	* Allocate for each prmap_t object, a corresponding RTSOLCOREMAPINFO object.
707	*/
708	pSolProc->pMapInfoHead = (PRTSOLCOREMAPINFO)GetMemoryChunk(pSolCore,
709	pSolProc->cMappings * sizeof(RTSOLCOREMAPINFO));
710	if (pSolProc->pMapInfoHead)
711	{
712	/*
713	* Associate the prmap_t with the mapping info object.
714	*/
715	/Assert(pSolProc->pMapInfoHead == NULL); - does not make sense /
716	PRTSOLCOREMAPINFO pCur = pSolProc->pMapInfoHead;
717	PRTSOLCOREMAPINFO pPrev = NULL;
718	for (uint64_t i = 0; i < pSolProc->cMappings; i++, pMap++, pCur++)
719	{
720	memcpy(&pCur->pMap, pMap, sizeof(pCur->pMap));
721	if (pPrev)
722	pPrev->pNext = pCur;
723
724	pCur->fError = 0;
725
726	/*
727	* Make sure we can read the mapping, otherwise mark them to be skipped.
728	*/
729	char achBuf[PAGE_SIZE];
730	uint64_t k = 0;
731	while (k < pCur->pMap.pr_size)
732	{
733	size_t cb = RT_MIN(sizeof(achBuf), pCur->pMap.pr_size - k);
734	int rc2 = ProcReadAddrSpace(pSolProc, pCur->pMap.pr_vaddr + k, &achBuf, cb);
735	if (RT_FAILURE(rc2))
736	{
737	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: skipping mapping. vaddr=%#x rc=%Rrc\n",
738	pCur->pMap.pr_vaddr, rc2));
739
740	/*
741	* Instead of storing the actual mapping data which we failed to read, the core
742	* will contain an errno in place. So we adjust the prmap_t's size field too
743	* so the program header offsets match.
744	*/
745	pCur->pMap.pr_size = RT_ALIGN_Z(sizeof(int), 8);
746	pCur->fError = errno;
747	if (pCur->fError == 0) /* huh!? somehow errno got reset? fake one! EFAULT is nice. */
748	pCur->fError = EFAULT;
749	break;
750	}
751	k += cb;
752	}
753
754	pPrev = pCur;
755	}
756	if (pPrev)
757	pPrev->pNext = NULL;
758
759	close(fdMap);
760	close(pSolProc->fdAs);
761	pSolProc->fdAs = -1;
762	CORELOG((CORELOG_NAME "ProcReadMappings: successfully read in %u mappings\n", pSolProc->cMappings));
763	return VINF_SUCCESS;
764	}
765
766	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: GetMemoryChunk failed %u\n",
767	pSolProc->cMappings * sizeof(RTSOLCOREMAPINFO)));
768	rc = VERR_NO_MEMORY;
769	}
770	else
771	{
772	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: Invalid mapping count %u\n", pSolProc->cMappings));
773	rc = VERR_READ_ERROR;
774	}
775	}
776	else
777	{
778	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: FileReadNoIntr failed. rc=%Rrc cbMapFile=%u\n", rc,
779	cbMapFile));
780	}
781	}
782	else
783	{
784	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: GetMemoryChunk failed. cbMapFile=%u\n", cbMapFile));
785	rc = VERR_NO_MEMORY;
786	}
787	}
788
789	close(pSolProc->fdAs);
790	pSolProc->fdAs = -1;
791	}
792	else
793	CORELOGRELSYS((CORELOG_NAME "ProcReadMappings: failed to open %s. rc=%Rrc\n", szPath, rc));
794
795	close(fdMap);
796	return rc;
797	}
798
799
800	/**
801	* Reads the thread information for all threads in the process.
802	*
803	* @param pSolCore Pointer to the core object.
804	*
805	* @remarks Should not be called before successful call to @see AllocMemoryArea()
806	* @return IPRT status code.
807	*/
808	static int ProcReadThreads(PRTSOLCORE pSolCore)
809	{
810	AssertReturn(pSolCore, VERR_INVALID_POINTER);
811
812	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
813	AssertReturn(pSolProc->pCurThreadCtx, VERR_NO_DATA);
814
815	/*
816	* Read the information for threads.
817	* Format: prheader_t + array of lwpsinfo_t's.
818	*/
819	size_t cbInfoHdrAndData;
820	void *pvInfoHdr = NULL;
821	int rc = ProcReadFileInto(pSolCore, "lpsinfo", &pvInfoHdr, &cbInfoHdrAndData);
822	if (RT_SUCCESS(rc))
823	{
824	/*
825	* Read the status of threads.
826	* Format: prheader_t + array of lwpstatus_t's.
827	*/
828	void *pvStatusHdr = NULL;
829	size_t cbStatusHdrAndData;
830	rc = ProcReadFileInto(pSolCore, "lstatus", &pvStatusHdr, &cbStatusHdrAndData);
831	if (RT_SUCCESS(rc))
832	{
833	prheader_t pInfoHdr = (prheader_t )pvInfoHdr;
834	prheader_t pStatusHdr = (prheader_t )pvStatusHdr;
835	lwpstatus_t pStatus = (lwpstatus_t )((uintptr_t)pStatusHdr + sizeof(prheader_t));
836	lwpsinfo_t pInfo = (lwpsinfo_t )((uintptr_t)pInfoHdr + sizeof(prheader_t));
837	uint64_t cStatus = pStatusHdr->pr_nent;
838	uint64_t cInfo = pInfoHdr->pr_nent;
839
840	CORELOG((CORELOG_NAME "ProcReadThreads: read info(%u) status(%u), threads:cInfo=%u cStatus=%u\n", cbInfoHdrAndData,
841	cbStatusHdrAndData, cInfo, cStatus));
842
843	/*
844	* Minor sanity size check (remember sizeof lwpstatus_t & lwpsinfo_t is <= size in file per entry).
845	*/
846	if ( (cbStatusHdrAndData - sizeof(prheader_t)) % pStatusHdr->pr_entsize == 0
847	&& (cbInfoHdrAndData - sizeof(prheader_t)) % pInfoHdr->pr_entsize == 0)
848	{
849	/*
850	* Make sure we have a matching lstatus entry for an lpsinfo entry unless
851	* it is a zombie thread, in which case we will not have a matching lstatus entry.
852	*/
853	for (; cInfo != 0; cInfo--)
854	{
855	if (pInfo->pr_sname != 'Z') /* zombie */
856	{
857	if ( cStatus == 0
858	\|\| pStatus->pr_lwpid != pInfo->pr_lwpid)
859	{
860	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: cStatus = %u pStatuslwpid=%d infolwpid=%d\n", cStatus,
861	pStatus->pr_lwpid, pInfo->pr_lwpid));
862	rc = VERR_INVALID_STATE;
863	break;
864	}
865	pStatus = (lwpstatus_t *)((uintptr_t)pStatus + pStatusHdr->pr_entsize);
866	cStatus--;
867	}
868	pInfo = (lwpsinfo_t *)((uintptr_t)pInfo + pInfoHdr->pr_entsize);
869	}
870
871	if (RT_SUCCESS(rc))
872	{
873	/*
874	* There can still be more lwpsinfo_t's than lwpstatus_t's, build the
875	* lists accordingly.
876	*/
877	pStatus = (lwpstatus_t *)((uintptr_t)pStatusHdr + sizeof(prheader_t));
878	pInfo = (lwpsinfo_t *)((uintptr_t)pInfoHdr + sizeof(prheader_t));
879	cInfo = pInfoHdr->pr_nent;
880	cStatus = pInfoHdr->pr_nent;
881
882	size_t cbThreadInfo = RT_MAX(cStatus, cInfo) * sizeof(RTSOLCORETHREADINFO);
883	pSolProc->pThreadInfoHead = (PRTSOLCORETHREADINFO)GetMemoryChunk(pSolCore, cbThreadInfo);
884	if (pSolProc->pThreadInfoHead)
885	{
886	PRTSOLCORETHREADINFO pCur = pSolProc->pThreadInfoHead;
887	PRTSOLCORETHREADINFO pPrev = NULL;
888	for (uint64_t i = 0; i < cInfo; i++, pCur++)
889	{
890	pCur->Info = *pInfo;
891	if ( pInfo->pr_sname != 'Z'
892	&& pInfo->pr_lwpid == pStatus->pr_lwpid)
893	{
894	/*
895	* Adjust the context of the dumping thread to reflect the context
896	* when the core dump got initiated before whatever signal caused it.
897	*/
898	if ( pStatus /* noid droid */
899	&& pStatus->pr_lwpid == (id_t)pSolProc->hCurThread)
900	{
901	AssertCompile(sizeof(pStatus->pr_reg) == sizeof(pSolProc->pCurThreadCtx->uc_mcontext.gregs));
902	AssertCompile(sizeof(pStatus->pr_fpreg) == sizeof(pSolProc->pCurThreadCtx->uc_mcontext.fpregs));
903	memcpy(&pStatus->pr_reg, &pSolProc->pCurThreadCtx->uc_mcontext.gregs, sizeof(pStatus->pr_reg));
904	memcpy(&pStatus->pr_fpreg, &pSolProc->pCurThreadCtx->uc_mcontext.fpregs, sizeof(pStatus->pr_fpreg));
905
906	AssertCompile(sizeof(pStatus->pr_lwphold) == sizeof(pSolProc->pCurThreadCtx->uc_sigmask));
907	memcpy(&pStatus->pr_lwphold, &pSolProc->pCurThreadCtx->uc_sigmask, sizeof(pStatus->pr_lwphold));
908	pStatus->pr_ustack = (uintptr_t)&pSolProc->pCurThreadCtx->uc_stack;
909
910	CORELOG((CORELOG_NAME "ProcReadThreads: patched dumper thread with pre-dump time context.\n"));
911	}
912
913	pCur->pStatus = pStatus;
914	pStatus = (lwpstatus_t *)((uintptr_t)pStatus + pStatusHdr->pr_entsize);
915	}
916	else
917	{
918	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: missing status for lwp %d\n", pInfo->pr_lwpid));
919	pCur->pStatus = NULL;
920	}
921
922	if (pPrev)
923	pPrev->pNext = pCur;
924	pPrev = pCur;
925	pInfo = (lwpsinfo_t *)((uintptr_t)pInfo + pInfoHdr->pr_entsize);
926	}
927	if (pPrev)
928	pPrev->pNext = NULL;
929
930	CORELOG((CORELOG_NAME "ProcReadThreads: successfully read %u threads.\n", cInfo));
931	pSolProc->cThreads = cInfo;
932	return VINF_SUCCESS;
933	}
934	else
935	{
936	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: GetMemoryChunk failed for %u bytes\n", cbThreadInfo));
937	rc = VERR_NO_MEMORY;
938	}
939	}
940	else
941	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: Invalid state information for threads. rc=%Rrc\n", rc));
942	}
943	else
944	{
945	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: huh!? cbStatusHdrAndData=%u prheader_t=%u entsize=%u\n",
946	cbStatusHdrAndData, sizeof(prheader_t), pStatusHdr->pr_entsize));
947	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: huh!? cbInfoHdrAndData=%u entsize=%u\n", cbInfoHdrAndData,
948	pStatusHdr->pr_entsize));
949	rc = VERR_INVALID_STATE;
950	}
951	}
952	else
953	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: ReadFileNoIntr failed for \"lpsinfo\" rc=%Rrc\n", rc));
954	}
955	else
956	CORELOGRELSYS((CORELOG_NAME "ProcReadThreads: ReadFileNoIntr failed for \"lstatus\" rc=%Rrc\n", rc));
957	return rc;
958	}
959
960
961	/**
962	* Reads miscellaneous information that is collected as part of a core file.
963	* This may include platform name, zone name and other OS-specific information.
964	*
965	* @param pSolCore Pointer to the core object.
966	*
967	* @return IPRT status code.
968	*/
969	static int ProcReadMiscInfo(PRTSOLCORE pSolCore)
970	{
971	AssertReturn(pSolCore, VERR_INVALID_POINTER);
972
973	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
974
975	#ifdef RT_OS_SOLARIS
976	/*
977	* Read the platform name, uname string and zone name.
978	*/
979	int rc = sysinfo(SI_PLATFORM, pSolProc->szPlatform, sizeof(pSolProc->szPlatform));
980	if (rc == -1)
981	{
982	CORELOGRELSYS((CORELOG_NAME "ProcReadMiscInfo: sysinfo failed. rc=%d errno=%d\n", rc, errno));
983	return VERR_GENERAL_FAILURE;
984	}
985	pSolProc->szPlatform[sizeof(pSolProc->szPlatform) - 1] = '\0';
986
987	rc = uname(&pSolProc->UtsName);
988	if (rc == -1)
989	{
990	CORELOGRELSYS((CORELOG_NAME "ProcReadMiscInfo: uname failed. rc=%d errno=%d\n", rc, errno));
991	return VERR_GENERAL_FAILURE;
992	}
993
994	rc = getzonenamebyid(pSolProc->ProcInfo.pr_zoneid, pSolProc->szZoneName, sizeof(pSolProc->szZoneName));
995	if (rc < 0)
996	{
997	CORELOGRELSYS((CORELOG_NAME "ProcReadMiscInfo: getzonenamebyid failed. rc=%d errno=%d zoneid=%d\n", rc, errno,
998	pSolProc->ProcInfo.pr_zoneid));
999	return VERR_GENERAL_FAILURE;
1000	}
1001	pSolProc->szZoneName[sizeof(pSolProc->szZoneName) - 1] = '\0';
1002	rc = VINF_SUCCESS;
1003
1004	#else
1005	# error Port Me!
1006	#endif
1007	return rc;
1008	}
1009
1010
1011	/**
1012	* On Solaris use the old-style procfs interfaces but the core file still should have this
1013	* info. for backward and GDB compatibility, hence the need for this ugly function.
1014	*
1015	* @param pSolCore Pointer to the core object.
1016	* @param pInfo Pointer to the old prpsinfo_t structure to update.
1017	*/
1018	static void GetOldProcessInfo(PRTSOLCORE pSolCore, prpsinfo_t *pInfo)
1019	{
1020	AssertReturnVoid(pSolCore);
1021	AssertReturnVoid(pInfo);
1022
1023	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1024	psinfo_t *pSrc = &pSolProc->ProcInfo;
1025	memset(pInfo, 0, sizeof(prpsinfo_t));
1026	pInfo->pr_state = pSrc->pr_lwp.pr_state;
1027	pInfo->pr_zomb = (pInfo->pr_state == SZOMB);
1028	RTStrCopy(pInfo->pr_clname, sizeof(pInfo->pr_clname), pSrc->pr_lwp.pr_clname);
1029	RTStrCopy(pInfo->pr_fname, sizeof(pInfo->pr_fname), pSrc->pr_fname);
1030	memcpy(&pInfo->pr_psargs, &pSrc->pr_psargs, sizeof(pInfo->pr_psargs));
1031	pInfo->pr_nice = pSrc->pr_lwp.pr_nice;
1032	pInfo->pr_flag = pSrc->pr_lwp.pr_flag;
1033	pInfo->pr_uid = pSrc->pr_uid;
1034	pInfo->pr_gid = pSrc->pr_gid;
1035	pInfo->pr_pid = pSrc->pr_pid;
1036	pInfo->pr_ppid = pSrc->pr_ppid;
1037	pInfo->pr_pgrp = pSrc->pr_pgid;
1038	pInfo->pr_sid = pSrc->pr_sid;
1039	pInfo->pr_addr = (caddr_t)pSrc->pr_addr;
1040	pInfo->pr_size = pSrc->pr_size;
1041	pInfo->pr_rssize = pSrc->pr_rssize;
1042	pInfo->pr_wchan = (caddr_t)pSrc->pr_lwp.pr_wchan;
1043	pInfo->pr_start = pSrc->pr_start;
1044	pInfo->pr_time = pSrc->pr_time;
1045	pInfo->pr_pri = pSrc->pr_lwp.pr_pri;
1046	pInfo->pr_oldpri = pSrc->pr_lwp.pr_oldpri;
1047	pInfo->pr_cpu = pSrc->pr_lwp.pr_cpu;
1048	pInfo->pr_ottydev = cmpdev(pSrc->pr_ttydev);
1049	pInfo->pr_lttydev = pSrc->pr_ttydev;
1050	pInfo->pr_syscall = pSrc->pr_lwp.pr_syscall;
1051	pInfo->pr_ctime = pSrc->pr_ctime;
1052	pInfo->pr_bysize = pSrc->pr_size * PAGESIZE;
1053	pInfo->pr_byrssize = pSrc->pr_rssize * PAGESIZE;
1054	pInfo->pr_argc = pSrc->pr_argc;
1055	pInfo->pr_argv = (char **)pSrc->pr_argv;
1056	pInfo->pr_envp = (char **)pSrc->pr_envp;
1057	pInfo->pr_wstat = pSrc->pr_wstat;
1058	pInfo->pr_pctcpu = pSrc->pr_pctcpu;
1059	pInfo->pr_pctmem = pSrc->pr_pctmem;
1060	pInfo->pr_euid = pSrc->pr_euid;
1061	pInfo->pr_egid = pSrc->pr_egid;
1062	pInfo->pr_aslwpid = 0;
1063	pInfo->pr_dmodel = pSrc->pr_dmodel;
1064	}
1065
1066
1067	/**
1068	* On Solaris use the old-style procfs interfaces but the core file still should have this
1069	* info. for backward and GDB compatibility, hence the need for this ugly function.
1070	*
1071	* @param pSolCore Pointer to the core object.
1072	* @param pInfo Pointer to the thread info.
1073	* @param pStatus Pointer to the thread status.
1074	* @param pDst Pointer to the old-style status structure to update.
1075	*
1076	*/
1077	static void GetOldProcessStatus(PRTSOLCORE pSolCore, lwpsinfo_t pInfo, lwpstatus_t pStatus, prstatus_t *pDst)
1078	{
1079	AssertReturnVoid(pSolCore);
1080	AssertReturnVoid(pInfo);
1081	AssertReturnVoid(pStatus);
1082	AssertReturnVoid(pDst);
1083
1084	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1085	memset(pDst, 0, sizeof(prstatus_t));
1086	if (pStatus->pr_flags & PR_STOPPED)
1087	pDst->pr_flags = 0x0001;
1088	if (pStatus->pr_flags & PR_ISTOP)
1089	pDst->pr_flags = 0x0002;
1090	if (pStatus->pr_flags & PR_DSTOP)
1091	pDst->pr_flags = 0x0004;
1092	if (pStatus->pr_flags & PR_ASLEEP)
1093	pDst->pr_flags = 0x0008;
1094	if (pStatus->pr_flags & PR_FORK)
1095	pDst->pr_flags = 0x0010;
1096	if (pStatus->pr_flags & PR_RLC)
1097	pDst->pr_flags = 0x0020;
1098	/* PR_PTRACE is never set */
1099	if (pStatus->pr_flags & PR_PCINVAL)
1100	pDst->pr_flags = 0x0080;
1101	if (pStatus->pr_flags & PR_ISSYS)
1102	pDst->pr_flags = 0x0100;
1103	if (pStatus->pr_flags & PR_STEP)
1104	pDst->pr_flags = 0x0200;
1105	if (pStatus->pr_flags & PR_KLC)
1106	pDst->pr_flags = 0x0400;
1107	if (pStatus->pr_flags & PR_ASYNC)
1108	pDst->pr_flags = 0x0800;
1109	if (pStatus->pr_flags & PR_PTRACE)
1110	pDst->pr_flags = 0x1000;
1111	if (pStatus->pr_flags & PR_MSACCT)
1112	pDst->pr_flags = 0x2000;
1113	if (pStatus->pr_flags & PR_BPTADJ)
1114	pDst->pr_flags = 0x4000;
1115	if (pStatus->pr_flags & PR_ASLWP)
1116	pDst->pr_flags = 0x8000;
1117
1118	pDst->pr_who = pStatus->pr_lwpid;
1119	pDst->pr_why = pStatus->pr_why;
1120	pDst->pr_what = pStatus->pr_what;
1121	pDst->pr_info = pStatus->pr_info;
1122	pDst->pr_cursig = pStatus->pr_cursig;
1123	pDst->pr_sighold = pStatus->pr_lwphold;
1124	pDst->pr_altstack = pStatus->pr_altstack;
1125	pDst->pr_action = pStatus->pr_action;
1126	pDst->pr_syscall = pStatus->pr_syscall;
1127	pDst->pr_nsysarg = pStatus->pr_nsysarg;
1128	pDst->pr_lwppend = pStatus->pr_lwppend;
1129	pDst->pr_oldcontext = (ucontext_t *)pStatus->pr_oldcontext;
1130	memcpy(pDst->pr_reg, pStatus->pr_reg, sizeof(pDst->pr_reg));
1131	memcpy(pDst->pr_sysarg, pStatus->pr_sysarg, sizeof(pDst->pr_sysarg));
1132	RTStrCopy(pDst->pr_clname, sizeof(pDst->pr_clname), pStatus->pr_clname);
1133
1134	pDst->pr_nlwp = pSolProc->ProcStatus.pr_nlwp;
1135	pDst->pr_sigpend = pSolProc->ProcStatus.pr_sigpend;
1136	pDst->pr_pid = pSolProc->ProcStatus.pr_pid;
1137	pDst->pr_ppid = pSolProc->ProcStatus.pr_ppid;
1138	pDst->pr_pgrp = pSolProc->ProcStatus.pr_pgid;
1139	pDst->pr_sid = pSolProc->ProcStatus.pr_sid;
1140	pDst->pr_utime = pSolProc->ProcStatus.pr_utime;
1141	pDst->pr_stime = pSolProc->ProcStatus.pr_stime;
1142	pDst->pr_cutime = pSolProc->ProcStatus.pr_cutime;
1143	pDst->pr_cstime = pSolProc->ProcStatus.pr_cstime;
1144	pDst->pr_brkbase = (caddr_t)pSolProc->ProcStatus.pr_brkbase;
1145	pDst->pr_brksize = pSolProc->ProcStatus.pr_brksize;
1146	pDst->pr_stkbase = (caddr_t)pSolProc->ProcStatus.pr_stkbase;
1147	pDst->pr_stksize = pSolProc->ProcStatus.pr_stksize;
1148
1149	pDst->pr_processor = (short)pInfo->pr_onpro;
1150	pDst->pr_bind = (short)pInfo->pr_bindpro;
1151	pDst->pr_instr = pStatus->pr_instr;
1152	}
1153
1154
1155	/**
1156	* Callback for rtCoreDumperForEachThread to suspend a thread.
1157	*
1158	* @param pSolCore Pointer to the core object.
1159	* @param pvThreadInfo Opaque pointer to thread information.
1160	*
1161	* @return IPRT status code.
1162	*/
1163	static int suspendThread(PRTSOLCORE pSolCore, void *pvThreadInfo)
1164	{
1165	AssertPtrReturn(pvThreadInfo, VERR_INVALID_POINTER);
1166	NOREF(pSolCore);
1167
1168	lwpsinfo_t pThreadInfo = (lwpsinfo_t )pvThreadInfo;
1169	CORELOG((CORELOG_NAME ":suspendThread %d\n", (lwpid_t)pThreadInfo->pr_lwpid));
1170	if ((lwpid_t)pThreadInfo->pr_lwpid != pSolCore->SolProc.hCurThread)
1171	_lwp_suspend(pThreadInfo->pr_lwpid);
1172	return VINF_SUCCESS;
1173	}
1174
1175
1176	/**
1177	* Callback for rtCoreDumperForEachThread to resume a thread.
1178	*
1179	* @param pSolCore Pointer to the core object.
1180	* @param pvThreadInfo Opaque pointer to thread information.
1181	*
1182	* @return IPRT status code.
1183	*/
1184	static int resumeThread(PRTSOLCORE pSolCore, void *pvThreadInfo)
1185	{
1186	AssertPtrReturn(pvThreadInfo, VERR_INVALID_POINTER);
1187	NOREF(pSolCore);
1188
1189	lwpsinfo_t pThreadInfo = (lwpsinfo_t )pvThreadInfo;
1190	CORELOG((CORELOG_NAME ":resumeThread %d\n", (lwpid_t)pThreadInfo->pr_lwpid));
1191	if ((lwpid_t)pThreadInfo->pr_lwpid != (lwpid_t)pSolCore->SolProc.hCurThread)
1192	_lwp_continue(pThreadInfo->pr_lwpid);
1193	return VINF_SUCCESS;
1194	}
1195
1196
1197	/**
1198	* Calls a thread worker function for all threads in the process as described by /proc
1199	*
1200	* @param pSolCore Pointer to the core object.
1201	* @param pcThreads Number of threads read.
1202	* @param pfnWorker Callback function for each thread.
1203	*
1204	* @return IPRT status code.
1205	*/
1206	static int rtCoreDumperForEachThread(PRTSOLCORE pSolCore, uint64_t *pcThreads, PFNRTSOLCORETHREADWORKER pfnWorker)
1207	{
1208	AssertPtrReturn(pSolCore, VERR_INVALID_POINTER);
1209
1210	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1211
1212	/*
1213	* Read the information for threads.
1214	* Format: prheader_t + array of lwpsinfo_t's.
1215	*/
1216	char szLpsInfoPath[PATH_MAX];
1217	RTStrPrintf(szLpsInfoPath, sizeof(szLpsInfoPath), "/proc/%d/lpsinfo", (int)pSolProc->Process);
1218
1219	int rc = VINF_SUCCESS;
1220	int fd = open(szLpsInfoPath, O_RDONLY);
1221	if (fd >= 0)
1222	{
1223	size_t cbInfoHdrAndData = GetFileSizeByFd(fd);
1224	void *pvInfoHdr = mmap(NULL, cbInfoHdrAndData, PROT_READ \| PROT_WRITE, MAP_PRIVATE \| MAP_ANON,
1225	-1 /* fd /, 0 / offset */);
1226	if (pvInfoHdr != MAP_FAILED)
1227	{
1228	rc = ReadFileNoIntr(fd, pvInfoHdr, cbInfoHdrAndData);
1229	if (RT_SUCCESS(rc))
1230	{
1231	prheader_t pHeader = (prheader_t )pvInfoHdr;
1232	lwpsinfo_t pThreadInfo = (lwpsinfo_t )((uintptr_t)pvInfoHdr + sizeof(prheader_t));
1233	for (long i = 0; i < pHeader->pr_nent; i++)
1234	{
1235	pfnWorker(pSolCore, pThreadInfo);
1236	pThreadInfo = (lwpsinfo_t *)((uintptr_t)pThreadInfo + pHeader->pr_entsize);
1237	}
1238	if (pcThreads)
1239	*pcThreads = pHeader->pr_nent;
1240	}
1241
1242	munmap(pvInfoHdr, cbInfoHdrAndData);
1243	}
1244	else
1245	rc = VERR_NO_MEMORY;
1246	close(fd);
1247	}
1248	else
1249	rc = RTErrConvertFromErrno(rc);
1250
1251	return rc;
1252	}
1253
1254
1255	/**
1256	* Resume all threads of this process.
1257	*
1258	* @param pSolCore Pointer to the core object.
1259	*
1260	* @return IPRT status code..
1261	*/
1262	static int rtCoreDumperResumeThreads(PRTSOLCORE pSolCore)
1263	{
1264	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1265
1266	#if 1
1267	uint64_t cThreads;
1268	return rtCoreDumperForEachThread(pSolCore, &cThreads, resumeThread);
1269	#else
1270	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1271
1272	char szCurThread[128];
1273	char szPath[PATH_MAX];
1274	PRTDIR pDir = NULL;
1275
1276	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/lwp", (int)pSolProc->Process);
1277	RTStrPrintf(szCurThread, sizeof(szCurThread), "%d", (int)pSolProc->hCurThread);
1278
1279	int32_t cRunningThreads = 0;
1280	int rc = RTDirOpen(&pDir, szPath);
1281	if (RT_SUCCESS(rc))
1282	{
1283	/*
1284	* Loop through all our threads & resume them.
1285	*/
1286	RTDIRENTRY DirEntry;
1287	while (RT_SUCCESS(RTDirRead(pDir, &DirEntry, NULL)))
1288	{
1289	if ( !strcmp(DirEntry.szName, ".")
1290	\|\| !strcmp(DirEntry.szName, ".."))
1291	continue;
1292
1293	if ( !strcmp(DirEntry.szName, szCurThread))
1294	continue;
1295
1296	int32_t ThreadId = RTStrToInt32(DirEntry.szName);
1297	_lwp_continue((lwpid_t)ThreadId);
1298	++cRunningThreads;
1299	}
1300
1301	CORELOG((CORELOG_NAME "ResumeAllThreads: resumed %d threads\n", cRunningThreads));
1302	RTDirClose(pDir);
1303	}
1304	else
1305	{
1306	CORELOGRELSYS((CORELOG_NAME "ResumeAllThreads: Failed to open %s\n", szPath));
1307	rc = VERR_READ_ERROR;
1308	}
1309	return rc;
1310	#endif
1311	}
1312
1313
1314	/**
1315	* Stop all running threads of this process except the current one.
1316	*
1317	* @param pSolCore Pointer to the core object.
1318	*
1319	* @return IPRT status code.
1320	*/
1321	static int rtCoreDumperSuspendThreads(PRTSOLCORE pSolCore)
1322	{
1323	AssertPtrReturn(pSolCore, VERR_INVALID_POINTER);
1324
1325	/*
1326	* This function tries to ensures while we suspend threads, no newly spawned threads
1327	* or a combination of spawning and terminating threads can cause any threads to be left running.
1328	* The assumption here is that threads can only increase not decrease across iterations.
1329	*/
1330	uint16_t cTries = 0;
1331	uint64_t aThreads[4];
1332	RT_ZERO(aThreads);
1333	int rc = VERR_GENERAL_FAILURE;
1334	void *pv = NULL;
1335	size_t cb = 0;
1336	for (cTries = 0; cTries < RT_ELEMENTS(aThreads); cTries++)
1337	{
1338	rc = rtCoreDumperForEachThread(pSolCore, &aThreads[cTries], suspendThread);
1339	if (RT_FAILURE(rc))
1340	break;
1341	}
1342	if ( RT_SUCCESS(rc)
1343	&& aThreads[cTries - 1] != aThreads[cTries - 2])
1344	{
1345	CORELOGRELSYS((CORELOG_NAME "rtCoreDumperSuspendThreads: possible thread bomb!?\n"));
1346	rc = VERR_TIMEOUT;
1347	}
1348	return rc;
1349	}
1350
1351
1352	/**
1353	* Returns size of an ELF NOTE header given the size of data the NOTE section will contain.
1354	*
1355	* @param cb Size of the data.
1356	*
1357	* @return Size of data actually used for NOTE header and section.
1358	*/
1359	static inline size_t ElfNoteHeaderSize(size_t cb)
1360	{
1361	return sizeof(ELFNOTEHDR) + RT_ALIGN_Z(cb, 4);
1362	}
1363
1364
1365	/**
1366	* Write an ELF NOTE header into the core file.
1367	*
1368	* @param pSolCore Pointer to the core object.
1369	* @param Type Type of this NOTE section.
1370	* @param pcv Opaque pointer to the data, if NULL only computes size.
1371	* @param cb Size of the data.
1372	*
1373	* @return IPRT status code.
1374	*/
1375	static int ElfWriteNoteHeader(PRTSOLCORE pSolCore, uint_t Type, const void *pcv, size_t cb)
1376	{
1377	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1378	AssertReturn(pcv, VERR_INVALID_POINTER);
1379	AssertReturn(cb > 0, VERR_NO_DATA);
1380	AssertReturn(pSolCore->pfnWriter, VERR_WRITE_ERROR);
1381	AssertReturn(pSolCore->fdCoreFile >= 0, VERR_INVALID_HANDLE);
1382
1383	int rc = VERR_GENERAL_FAILURE;
1384	#ifdef RT_OS_SOLARIS
1385	ELFNOTEHDR ElfNoteHdr;
1386	RT_ZERO(ElfNoteHdr);
1387	ElfNoteHdr.achName[0] = 'C';
1388	ElfNoteHdr.achName[1] = 'O';
1389	ElfNoteHdr.achName[2] = 'R';
1390	ElfNoteHdr.achName[3] = 'E';
1391
1392	/*
1393	* This is a known violation of the 64-bit ELF spec., see xTracker @bugref{5211}
1394	* for the historic reasons as to the padding and namesz anomalies.
1395	*/
1396	static const char s_achPad[3] = { 0, 0, 0 };
1397	size_t cbAlign = RT_ALIGN_Z(cb, 4);
1398	ElfNoteHdr.Hdr.n_namesz = 5;
1399	ElfNoteHdr.Hdr.n_type = Type;
1400	ElfNoteHdr.Hdr.n_descsz = cbAlign;
1401
1402	/*
1403	* Write note header and description.
1404	*/
1405	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &ElfNoteHdr, sizeof(ElfNoteHdr));
1406	if (RT_SUCCESS(rc))
1407	{
1408	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, pcv, cb);
1409	if (RT_SUCCESS(rc))
1410	{
1411	if (cbAlign > cb)
1412	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, s_achPad, cbAlign - cb);
1413	}
1414	}
1415
1416	if (RT_FAILURE(rc))
1417	CORELOGRELSYS((CORELOG_NAME "ElfWriteNote: pfnWriter failed. Type=%d rc=%Rrc\n", Type, rc));
1418	#else
1419	#error Port Me!
1420	#endif
1421	return rc;
1422	}
1423
1424
1425	/**
1426	* Computes the size of NOTE section for the given core type.
1427	* Solaris has two types of program header information (new and old).
1428	*
1429	* @param pSolCore Pointer to the core object.
1430	* @param enmType Type of core file information required.
1431	*
1432	* @return Size of NOTE section.
1433	*/
1434	static size_t ElfNoteSectionSize(PRTSOLCORE pSolCore, RTSOLCORETYPE enmType)
1435	{
1436	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1437	size_t cb = 0;
1438	switch (enmType)
1439	{
1440	case enmOldEra:
1441	{
1442	cb += ElfNoteHeaderSize(sizeof(prpsinfo_t));
1443	cb += ElfNoteHeaderSize(pSolProc->cAuxVecs * sizeof(auxv_t));
1444	cb += ElfNoteHeaderSize(strlen(pSolProc->szPlatform));
1445
1446	PRTSOLCORETHREADINFO pThreadInfo = pSolProc->pThreadInfoHead;
1447	while (pThreadInfo)
1448	{
1449	if (pThreadInfo->pStatus)
1450	{
1451	cb += ElfNoteHeaderSize(sizeof(prstatus_t));
1452	cb += ElfNoteHeaderSize(sizeof(prfpregset_t));
1453	}
1454	pThreadInfo = pThreadInfo->pNext;
1455	}
1456
1457	break;
1458	}
1459
1460	case enmNewEra:
1461	{
1462	cb += ElfNoteHeaderSize(sizeof(psinfo_t));
1463	cb += ElfNoteHeaderSize(sizeof(pstatus_t));
1464	cb += ElfNoteHeaderSize(pSolProc->cAuxVecs * sizeof(auxv_t));
1465	cb += ElfNoteHeaderSize(strlen(pSolProc->szPlatform) + 1);
1466	cb += ElfNoteHeaderSize(sizeof(struct utsname));
1467	cb += ElfNoteHeaderSize(sizeof(core_content_t));
1468	cb += ElfNoteHeaderSize(pSolProc->cbCred);
1469
1470	if (pSolProc->pPriv)
1471	cb += ElfNoteHeaderSize(PRIV_PRPRIV_SIZE(pSolProc->pPriv)); /* Ought to be same as cbPriv!? */
1472
1473	if (pSolProc->pcPrivImpl)
1474	cb += ElfNoteHeaderSize(PRIV_IMPL_INFO_SIZE(pSolProc->pcPrivImpl));
1475
1476	cb += ElfNoteHeaderSize(strlen(pSolProc->szZoneName) + 1);
1477	if (pSolProc->cbLdt > 0)
1478	cb += ElfNoteHeaderSize(pSolProc->cbLdt);
1479
1480	PRTSOLCORETHREADINFO pThreadInfo = pSolProc->pThreadInfoHead;
1481	while (pThreadInfo)
1482	{
1483	cb += ElfNoteHeaderSize(sizeof(lwpsinfo_t));
1484	if (pThreadInfo->pStatus)
1485	cb += ElfNoteHeaderSize(sizeof(lwpstatus_t));
1486
1487	pThreadInfo = pThreadInfo->pNext;
1488	}
1489
1490	break;
1491	}
1492
1493	default:
1494	{
1495	CORELOGRELSYS((CORELOG_NAME "ElfNoteSectionSize: Unknown segment era %d\n", enmType));
1496	break;
1497	}
1498	}
1499
1500	return cb;
1501	}
1502
1503
1504	/**
1505	* Write the note section for the given era into the core file.
1506	* Solaris has two types of program header information (new and old).
1507	*
1508	* @param pSolCore Pointer to the core object.
1509	* @param enmType Type of core file information required.
1510	*
1511	* @return IPRT status code.
1512	*/
1513	static int ElfWriteNoteSection(PRTSOLCORE pSolCore, RTSOLCORETYPE enmType)
1514	{
1515	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1516
1517	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1518	int rc = VERR_GENERAL_FAILURE;
1519
1520	#ifdef RT_OS_SOLARIS
1521	typedef int (PFNELFWRITENOTEHDR)(PRTSOLCORE pSolCore, uint_t, const void pcv, size_t cb);
1522	typedef struct ELFWRITENOTE
1523	{
1524	const char *pszType;
1525	uint_t Type;
1526	const void *pcv;
1527	size_t cb;
1528	} ELFWRITENOTE;
1529
1530	switch (enmType)
1531	{
1532	case enmOldEra:
1533	{
1534	ELFWRITENOTE aElfNotes[] =
1535	{
1536	{ "NT_PRPSINFO", NT_PRPSINFO, &pSolProc->ProcInfoOld, sizeof(prpsinfo_t) },
1537	{ "NT_AUXV", NT_AUXV, pSolProc->pAuxVecs, pSolProc->cAuxVecs * sizeof(auxv_t) },
1538	{ "NT_PLATFORM", NT_PLATFORM, pSolProc->szPlatform, strlen(pSolProc->szPlatform) + 1 }
1539	};
1540
1541	for (unsigned i = 0; i < RT_ELEMENTS(aElfNotes); i++)
1542	{
1543	rc = ElfWriteNoteHeader(pSolCore, aElfNotes[i].Type, aElfNotes[i].pcv, aElfNotes[i].cb);
1544	if (RT_FAILURE(rc))
1545	{
1546	CORELOGRELSYS((CORELOG_NAME "ElfWriteNoteSection: ElfWriteNoteHeader failed for %s. rc=%Rrc\n",
1547	aElfNotes[i].pszType, rc));
1548	break;
1549	}
1550	}
1551
1552	/*
1553	* Write old-style thread info., they contain nothing about zombies,
1554	* so we just skip if there is no status information for them.
1555	*/
1556	PRTSOLCORETHREADINFO pThreadInfo = pSolProc->pThreadInfoHead;
1557	for (; pThreadInfo; pThreadInfo = pThreadInfo->pNext)
1558	{
1559	if (!pThreadInfo->pStatus)
1560	continue;
1561
1562	prstatus_t OldProcessStatus;
1563	GetOldProcessStatus(pSolCore, &pThreadInfo->Info, pThreadInfo->pStatus, &OldProcessStatus);
1564	rc = ElfWriteNoteHeader(pSolCore, NT_PRSTATUS, &OldProcessStatus, sizeof(prstatus_t));
1565	if (RT_SUCCESS(rc))
1566	{
1567	rc = ElfWriteNoteHeader(pSolCore, NT_PRFPREG, &pThreadInfo->pStatus->pr_fpreg, sizeof(prfpregset_t));
1568	if (RT_FAILURE(rc))
1569	{
1570	CORELOGRELSYS((CORELOG_NAME "ElfWriteSegment: ElfWriteNote failed for NT_PRFPREF. rc=%Rrc\n", rc));
1571	break;
1572	}
1573	}
1574	else
1575	{
1576	CORELOGRELSYS((CORELOG_NAME "ElfWriteSegment: ElfWriteNote failed for NT_PRSTATUS. rc=%Rrc\n", rc));
1577	break;
1578	}
1579	}
1580	break;
1581	}
1582
1583	case enmNewEra:
1584	{
1585	ELFWRITENOTE aElfNotes[] =
1586	{
1587	{ "NT_PSINFO", NT_PSINFO, &pSolProc->ProcInfo, sizeof(psinfo_t) },
1588	{ "NT_PSTATUS", NT_PSTATUS, &pSolProc->ProcStatus, sizeof(pstatus_t) },
1589	{ "NT_AUXV", NT_AUXV, pSolProc->pAuxVecs, pSolProc->cAuxVecs * sizeof(auxv_t) },
1590	{ "NT_PLATFORM", NT_PLATFORM, pSolProc->szPlatform, strlen(pSolProc->szPlatform) + 1 },
1591	{ "NT_UTSNAME", NT_UTSNAME, &pSolProc->UtsName, sizeof(struct utsname) },
1592	{ "NT_CONTENT", NT_CONTENT, &pSolProc->CoreContent, sizeof(core_content_t) },
1593	{ "NT_PRCRED", NT_PRCRED, pSolProc->pvCred, pSolProc->cbCred },
1594	{ "NT_PRPRIV", NT_PRPRIV, pSolProc->pPriv, PRIV_PRPRIV_SIZE(pSolProc->pPriv) },
1595	{ "NT_PRPRIVINFO", NT_PRPRIVINFO, pSolProc->pcPrivImpl, PRIV_IMPL_INFO_SIZE(pSolProc->pcPrivImpl) },
1596	{ "NT_ZONENAME", NT_ZONENAME, pSolProc->szZoneName, strlen(pSolProc->szZoneName) + 1 }
1597	};
1598
1599	for (unsigned i = 0; i < RT_ELEMENTS(aElfNotes); i++)
1600	{
1601	rc = ElfWriteNoteHeader(pSolCore, aElfNotes[i].Type, aElfNotes[i].pcv, aElfNotes[i].cb);
1602	if (RT_FAILURE(rc))
1603	{
1604	CORELOGRELSYS((CORELOG_NAME "ElfWriteNoteSection: ElfWriteNoteHeader failed for %s. rc=%Rrc\n",
1605	aElfNotes[i].pszType, rc));
1606	break;
1607	}
1608	}
1609
1610	/*
1611	* Write new-style thread info., missing lwpstatus_t indicates it's a zombie thread
1612	* we only dump the lwpsinfo_t in that case.
1613	*/
1614	PRTSOLCORETHREADINFO pThreadInfo = pSolProc->pThreadInfoHead;
1615	for (; pThreadInfo; pThreadInfo = pThreadInfo->pNext)
1616	{
1617	rc = ElfWriteNoteHeader(pSolCore, NT_LWPSINFO, &pThreadInfo->Info, sizeof(lwpsinfo_t));
1618	if (RT_FAILURE(rc))
1619	{
1620	CORELOGRELSYS((CORELOG_NAME "ElfWriteNoteSection: ElfWriteNoteHeader for NT_LWPSINFO failed. rc=%Rrc\n", rc));
1621	break;
1622	}
1623
1624	if (pThreadInfo->pStatus)
1625	{
1626	rc = ElfWriteNoteHeader(pSolCore, NT_LWPSTATUS, pThreadInfo->pStatus, sizeof(lwpstatus_t));
1627	if (RT_FAILURE(rc))
1628	{
1629	CORELOGRELSYS((CORELOG_NAME "ElfWriteNoteSection: ElfWriteNoteHeader for NT_LWPSTATUS failed. rc=%Rrc\n",
1630	rc));
1631	break;
1632	}
1633	}
1634	}
1635	break;
1636	}
1637
1638	default:
1639	{
1640	CORELOGRELSYS((CORELOG_NAME "ElfWriteNoteSection: Invalid type %d\n", enmType));
1641	rc = VERR_GENERAL_FAILURE;
1642	break;
1643	}
1644	}
1645	#else
1646	# error Port Me!
1647	#endif
1648	return rc;
1649	}
1650
1651
1652	/**
1653	* Write mappings into the core file.
1654	*
1655	* @param pSolCore Pointer to the core object.
1656	*
1657	* @return IPRT status code.
1658	*/
1659	static int ElfWriteMappings(PRTSOLCORE pSolCore)
1660	{
1661	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1662
1663	int rc = VERR_GENERAL_FAILURE;
1664	PRTSOLCOREMAPINFO pMapInfo = pSolProc->pMapInfoHead;
1665	while (pMapInfo)
1666	{
1667	if (!pMapInfo->fError)
1668	{
1669	uint64_t k = 0;
1670	char achBuf[PAGE_SIZE];
1671	while (k < pMapInfo->pMap.pr_size)
1672	{
1673	size_t cb = RT_MIN(sizeof(achBuf), pMapInfo->pMap.pr_size - k);
1674	int rc2 = ProcReadAddrSpace(pSolProc, pMapInfo->pMap.pr_vaddr + k, &achBuf, cb);
1675	if (RT_FAILURE(rc2))
1676	{
1677	CORELOGRELSYS((CORELOG_NAME "ElfWriteMappings: Failed to read mapping, can't recover. Bye. rc=%Rrc\n", rc));
1678	return VERR_INVALID_STATE;
1679	}
1680
1681	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, achBuf, sizeof(achBuf));
1682	if (RT_FAILURE(rc))
1683	{
1684	CORELOGRELSYS((CORELOG_NAME "ElfWriteMappings: pfnWriter failed. rc=%Rrc\n", rc));
1685	return rc;
1686	}
1687	k += cb;
1688	}
1689	}
1690	else
1691	{
1692	char achBuf[RT_ALIGN_Z(sizeof(int), 8)];
1693	RT_ZERO(achBuf);
1694	memcpy(achBuf, &pMapInfo->fError, sizeof(pMapInfo->fError));
1695	if (sizeof(achBuf) != pMapInfo->pMap.pr_size)
1696	CORELOGRELSYS((CORELOG_NAME "ElfWriteMappings: Huh!? something is wrong!\n"));
1697	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &achBuf, sizeof(achBuf));
1698	if (RT_FAILURE(rc))
1699	{
1700	CORELOGRELSYS((CORELOG_NAME "ElfWriteMappings: pfnWriter(2) failed. rc=%Rrc\n", rc));
1701	return rc;
1702	}
1703	}
1704
1705	pMapInfo = pMapInfo->pNext;
1706	}
1707
1708	return VINF_SUCCESS;
1709	}
1710
1711
1712	/**
1713	* Write program headers for all mappings into the core file.
1714	*
1715	* @param pSolCore Pointer to the core object.
1716	*
1717	* @return IPRT status code.
1718	*/
1719	static int ElfWriteMappingHeaders(PRTSOLCORE pSolCore)
1720	{
1721	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1722
1723	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1724	Elf_Phdr ProgHdr;
1725	RT_ZERO(ProgHdr);
1726	ProgHdr.p_type = PT_LOAD;
1727
1728	int rc = VERR_GENERAL_FAILURE;
1729	PRTSOLCOREMAPINFO pMapInfo = pSolProc->pMapInfoHead;
1730	while (pMapInfo)
1731	{
1732	ProgHdr.p_vaddr = pMapInfo->pMap.pr_vaddr; /* Virtual address of this mapping in the process address space */
1733	ProgHdr.p_offset = pSolCore->offWrite; /* Where this mapping is located in the core file */
1734	ProgHdr.p_memsz = pMapInfo->pMap.pr_size; /* Size of the memory image of the mapping */
1735	ProgHdr.p_filesz = pMapInfo->pMap.pr_size; /* Size of the file image of the mapping */
1736
1737	ProgHdr.p_flags = 0; /* Reset fields in a loop when needed! */
1738	if (pMapInfo->pMap.pr_mflags & MA_READ)
1739	ProgHdr.p_flags \|= PF_R;
1740	if (pMapInfo->pMap.pr_mflags & MA_WRITE)
1741	ProgHdr.p_flags \|= PF_W;
1742	if (pMapInfo->pMap.pr_mflags & MA_EXEC)
1743	ProgHdr.p_flags \|= PF_X;
1744
1745	if (pMapInfo->fError)
1746	ProgHdr.p_flags \|= PF_SUNW_FAILURE;
1747
1748	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &ProgHdr, sizeof(ProgHdr));
1749	if (RT_FAILURE(rc))
1750	{
1751	CORELOGRELSYS((CORELOG_NAME "ElfWriteMappingHeaders: pfnWriter failed. rc=%Rrc\n", rc));
1752	return rc;
1753	}
1754
1755	pSolCore->offWrite += ProgHdr.p_filesz;
1756	pMapInfo = pMapInfo->pNext;
1757	}
1758	return rc;
1759	}
1760
1761	/**
1762	* Inner worker for rtCoreDumperWriteCore, which purpose is to
1763	* squash cleanup gotos.
1764	*/
1765	static int rtCoreDumperWriteCoreDoIt(PRTSOLCORE pSolCore, PFNRTCOREWRITER pfnWriter,
1766	PRTSOLCOREPROCESS pSolProc)
1767	{
1768	pSolCore->offWrite = 0;
1769	uint32_t cProgHdrs = pSolProc->cMappings + 2; /* two PT_NOTE program headers (old, new style) */
1770
1771	/*
1772	* Write the ELF header.
1773	*/
1774	Elf_Ehdr ElfHdr;
1775	RT_ZERO(ElfHdr);
1776	ElfHdr.e_ident[EI_MAG0] = ELFMAG0;
1777	ElfHdr.e_ident[EI_MAG1] = ELFMAG1;
1778	ElfHdr.e_ident[EI_MAG2] = ELFMAG2;
1779	ElfHdr.e_ident[EI_MAG3] = ELFMAG3;
1780	ElfHdr.e_ident[EI_DATA] = IsBigEndian() ? ELFDATA2MSB : ELFDATA2LSB;
1781	ElfHdr.e_type = ET_CORE;
1782	ElfHdr.e_version = EV_CURRENT;
1783	#ifdef RT_ARCH_AMD64
1784	ElfHdr.e_machine = EM_AMD64;
1785	ElfHdr.e_ident[EI_CLASS] = ELFCLASS64;
1786	#else
1787	ElfHdr.e_machine = EM_386;
1788	ElfHdr.e_ident[EI_CLASS] = ELFCLASS32;
1789	#endif
1790	if (cProgHdrs >= PN_XNUM)
1791	ElfHdr.e_phnum = PN_XNUM;
1792	else
1793	ElfHdr.e_phnum = cProgHdrs;
1794	ElfHdr.e_ehsize = sizeof(ElfHdr);
1795	ElfHdr.e_phoff = sizeof(ElfHdr);
1796	ElfHdr.e_phentsize = sizeof(Elf_Phdr);
1797	ElfHdr.e_shentsize = sizeof(Elf_Shdr);
1798	int rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &ElfHdr, sizeof(ElfHdr));
1799	if (RT_FAILURE(rc))
1800	{
1801	CORELOGRELSYS((CORELOG_NAME "WriteCore: pfnWriter failed writing ELF header. rc=%Rrc\n", rc));
1802	return rc;
1803	}
1804
1805	/*
1806	* Setup program header.
1807	*/
1808	Elf_Phdr ProgHdr;
1809	RT_ZERO(ProgHdr);
1810	ProgHdr.p_type = PT_NOTE;
1811	ProgHdr.p_flags = PF_R;
1812
1813	/*
1814	* Write old-style NOTE program header.
1815	*/
1816	pSolCore->offWrite += sizeof(ElfHdr) + cProgHdrs * sizeof(ProgHdr);
1817	ProgHdr.p_offset = pSolCore->offWrite;
1818	ProgHdr.p_filesz = ElfNoteSectionSize(pSolCore, enmOldEra);
1819	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &ProgHdr, sizeof(ProgHdr));
1820	if (RT_FAILURE(rc))
1821	{
1822	CORELOGRELSYS((CORELOG_NAME "WriteCore: pfnWriter failed writing old-style ELF program Header. rc=%Rrc\n", rc));
1823	return rc;
1824	}
1825
1826	/*
1827	* Write new-style NOTE program header.
1828	*/
1829	pSolCore->offWrite += ProgHdr.p_filesz;
1830	ProgHdr.p_offset = pSolCore->offWrite;
1831	ProgHdr.p_filesz = ElfNoteSectionSize(pSolCore, enmNewEra);
1832	rc = pSolCore->pfnWriter(pSolCore->fdCoreFile, &ProgHdr, sizeof(ProgHdr));
1833	if (RT_FAILURE(rc))
1834	{
1835	CORELOGRELSYS((CORELOG_NAME "WriteCore: pfnWriter failed writing new-style ELF program header. rc=%Rrc\n", rc));
1836	return rc;
1837	}
1838
1839	/*
1840	* Write program headers per mapping.
1841	*/
1842	pSolCore->offWrite += ProgHdr.p_filesz;
1843	rc = ElfWriteMappingHeaders(pSolCore);
1844	if (RT_FAILURE(rc))
1845	{
1846	CORELOGRELSYS((CORELOG_NAME "Write: ElfWriteMappings failed. rc=%Rrc\n", rc));
1847	return rc;
1848	}
1849
1850	/*
1851	* Write old-style note section.
1852	*/
1853	rc = ElfWriteNoteSection(pSolCore, enmOldEra);
1854	if (RT_FAILURE(rc))
1855	{
1856	CORELOGRELSYS((CORELOG_NAME "WriteCore: ElfWriteNoteSection old-style failed. rc=%Rrc\n", rc));
1857	return rc;
1858	}
1859
1860	/*
1861	* Write new-style section.
1862	*/
1863	rc = ElfWriteNoteSection(pSolCore, enmNewEra);
1864	if (RT_FAILURE(rc))
1865	{
1866	CORELOGRELSYS((CORELOG_NAME "WriteCore: ElfWriteNoteSection new-style failed. rc=%Rrc\n", rc));
1867	return rc;
1868	}
1869
1870	/*
1871	* Write all mappings.
1872	*/
1873	rc = ElfWriteMappings(pSolCore);
1874	if (RT_FAILURE(rc))
1875	{
1876	CORELOGRELSYS((CORELOG_NAME "WriteCore: ElfWriteMappings failed. rc=%Rrc\n", rc));
1877	return rc;
1878	}
1879
1880	return rc;
1881	}
1882
1883
1884	/**
1885	* Write a prepared core file using a user-passed in writer function, requires all threads
1886	* to be in suspended state (i.e. called after CreateCore).
1887	*
1888	* @param pSolCore Pointer to the core object.
1889	* @param pfnWriter Pointer to the writer function to override default writer (NULL uses default).
1890	*
1891	* @remarks Resumes all suspended threads, unless it's an invalid core. This
1892	* function must be called only -after- rtCoreDumperCreateCore().
1893	* @return IPRT status.
1894	*/
1895	static int rtCoreDumperWriteCore(PRTSOLCORE pSolCore, PFNRTCOREWRITER pfnWriter)
1896	{
1897	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1898
1899	if (!pSolCore->fIsValid)
1900	return VERR_INVALID_STATE;
1901
1902	if (pfnWriter)
1903	pSolCore->pfnWriter = pfnWriter;
1904
1905	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1906	char szPath[PATH_MAX];
1907	int rc;
1908
1909	/*
1910	* Open the process address space file.
1911	*/
1912	RTStrPrintf(szPath, sizeof(szPath), "/proc/%d/as", (int)pSolProc->Process);
1913	int fd = open(szPath, O_RDONLY);
1914	if (fd >= 0)
1915	{
1916	pSolProc->fdAs = fd;
1917
1918	/*
1919	* Create the core file.
1920	*/
1921	fd = open(pSolCore->szCorePath, O_CREAT \| O_TRUNC \| O_RDWR, S_IRUSR);
1922	if (fd >= 0)
1923	{
1924	pSolCore->fdCoreFile = fd;
1925
1926	/*
1927	* Do the actual writing.
1928	*/
1929	rc = rtCoreDumperWriteCoreDoIt(pSolCore, pfnWriter, pSolProc);
1930
1931	close(pSolCore->fdCoreFile);
1932	pSolCore->fdCoreFile = -1;
1933	}
1934	else
1935	{
1936	rc = RTErrConvertFromErrno(fd);
1937	CORELOGRELSYS((CORELOG_NAME "WriteCore: failed to open %s. rc=%Rrc\n", pSolCore->szCorePath, rc));
1938	}
1939	close(pSolProc->fdAs);
1940	pSolProc->fdAs = -1;
1941	}
1942	else
1943	{
1944	rc = RTErrConvertFromErrno(fd);
1945	CORELOGRELSYS((CORELOG_NAME "WriteCore: Failed to open address space, %s. rc=%Rrc\n", szPath, rc));
1946	}
1947
1948	rtCoreDumperResumeThreads(pSolCore);
1949	return rc;
1950	}
1951
1952
1953	/**
1954	* Takes a process snapshot into a passed-in core object. It has the side-effect of halting
1955	* all threads which can lead to things like spurious wakeups of threads (if and when threads
1956	* are ultimately resumed en-masse) already suspended while calling this function.
1957	*
1958	* @param pSolCore Pointer to a core object.
1959	* @param pContext Pointer to the caller context thread.
1960	* @param pszCoreFilePath Path to the core file. If NULL is passed, the global
1961	* path specified in RTCoreDumperSetup() would be used.
1962	*
1963	* @remarks Halts all threads.
1964	* @return IPRT status code.
1965	*/
1966	static int rtCoreDumperCreateCore(PRTSOLCORE pSolCore, ucontext_t pContext, const char pszCoreFilePath)
1967	{
1968	AssertReturn(pSolCore, VERR_INVALID_POINTER);
1969	AssertReturn(pContext, VERR_INVALID_POINTER);
1970
1971	/*
1972	* Initialize core structures.
1973	*/
1974	memset(pSolCore, 0, sizeof(RTSOLCORE));
1975	pSolCore->pfnReader = &ReadFileNoIntr;
1976	pSolCore->pfnWriter = &WriteFileNoIntr;
1977	pSolCore->fIsValid = false;
1978	pSolCore->fdCoreFile = -1;
1979
1980	PRTSOLCOREPROCESS pSolProc = &pSolCore->SolProc;
1981	pSolProc->Process = RTProcSelf();
1982	pSolProc->hCurThread = _lwp_self(); /* thr_self() */
1983	pSolProc->fdAs = -1;
1984	pSolProc->pCurThreadCtx = pContext;
1985	pSolProc->CoreContent = CC_CONTENT_DEFAULT;
1986
1987	RTProcGetExecutablePath(pSolProc->szExecPath, sizeof(pSolProc->szExecPath)); /* this gets full path not just name */
1988	pSolProc->pszExecName = RTPathFilename(pSolProc->szExecPath);
1989
1990	/*
1991	* If a path has been specified, use it. Otherwise use the global path.
1992	*/
1993	if (!pszCoreFilePath)
1994	{
1995	/*
1996	* If no output directory is specified, use current directory.
1997	*/
1998	if (g_szCoreDumpDir[0] == '\0')
1999	g_szCoreDumpDir[0] = '.';
2000
2001	if (g_szCoreDumpFile[0] == '\0')
2002	{
2003	/* We cannot call RTPathAbs() as they call getcwd() which calls malloc. /
2004	RTStrPrintf(pSolCore->szCorePath, sizeof(pSolCore->szCorePath), "%s/core.vb.%s.%d",
2005	g_szCoreDumpDir, pSolProc->pszExecName, (int)pSolProc->Process);
2006	}
2007	else
2008	RTStrPrintf(pSolCore->szCorePath, sizeof(pSolCore->szCorePath), "%s/core.vb.%s", g_szCoreDumpDir, g_szCoreDumpFile);
2009	}
2010	else
2011	RTStrCopy(pSolCore->szCorePath, sizeof(pSolCore->szCorePath), pszCoreFilePath);
2012
2013	CORELOG((CORELOG_NAME "CreateCore: Taking Core %s from Thread %d\n", pSolCore->szCorePath, (int)pSolProc->hCurThread));
2014
2015	/*
2016	* Quiesce the process.
2017	*/
2018	int rc = rtCoreDumperSuspendThreads(pSolCore);
2019	if (RT_SUCCESS(rc))
2020	{
2021	rc = ProcReadInfo(pSolCore);
2022	if (RT_SUCCESS(rc))
2023	{
2024	GetOldProcessInfo(pSolCore, &pSolProc->ProcInfoOld);
2025	if (IsProcessArchNative(pSolProc))
2026	{
2027	/*
2028	* Read process status, information such as number of active LWPs will be
2029	* invalid since we just quiesced the process.
2030	*/
2031	rc = ProcReadStatus(pSolCore);
2032	if (RT_SUCCESS(rc))
2033	{
2034	rc = AllocMemoryArea(pSolCore);
2035	if (RT_SUCCESS(rc))
2036	{
2037	struct COREACCUMULATOR
2038	{
2039	const char *pszName;
2040	PFNRTSOLCOREACCUMULATOR pfnAcc;
2041	bool fOptional;
2042	} aAccumulators[] =
2043	{
2044	{ "ProcReadLdt", &ProcReadLdt, false },
2045	{ "ProcReadCred", &ProcReadCred, false },
2046	{ "ProcReadPriv", &ProcReadPriv, false },
2047	{ "ProcReadAuxVecs", &ProcReadAuxVecs, false },
2048	{ "ProcReadMappings", &ProcReadMappings, false },
2049	{ "ProcReadThreads", &ProcReadThreads, false },
2050	{ "ProcReadMiscInfo", &ProcReadMiscInfo, false }
2051	};
2052
2053	for (unsigned i = 0; i < RT_ELEMENTS(aAccumulators); i++)
2054	{
2055	rc = aAccumulators[i].pfnAcc(pSolCore);
2056	if (RT_FAILURE(rc))
2057	{
2058	CORELOGRELSYS((CORELOG_NAME "CreateCore: %s failed. rc=%Rrc\n", aAccumulators[i].pszName, rc));
2059	if (!aAccumulators[i].fOptional)
2060	break;
2061	}
2062	}
2063
2064	if (RT_SUCCESS(rc))
2065	{
2066	pSolCore->fIsValid = true;
2067	return VINF_SUCCESS;
2068	}
2069
2070	FreeMemoryArea(pSolCore);
2071	}
2072	else
2073	CORELOGRELSYS((CORELOG_NAME "CreateCore: AllocMemoryArea failed. rc=%Rrc\n", rc));
2074	}
2075	else
2076	CORELOGRELSYS((CORELOG_NAME "CreateCore: ProcReadStatus failed. rc=%Rrc\n", rc));
2077	}
2078	else
2079	{
2080	CORELOGRELSYS((CORELOG_NAME "CreateCore: IsProcessArchNative failed.\n"));
2081	rc = VERR_BAD_EXE_FORMAT;
2082	}
2083	}
2084	else
2085	CORELOGRELSYS((CORELOG_NAME "CreateCore: ProcReadInfo failed. rc=%Rrc\n", rc));
2086
2087	/*
2088	* Resume threads on failure.
2089	*/
2090	rtCoreDumperResumeThreads(pSolCore);
2091	}
2092	else
2093	CORELOG((CORELOG_NAME "CreateCore: SuspendAllThreads failed. Thread bomb!?! rc=%Rrc\n", rc));
2094
2095	return rc;
2096	}
2097
2098
2099	/**
2100	* Destroy an existing core object.
2101	*
2102	* @param pSolCore Pointer to the core object.
2103	*
2104	* @return IPRT status code.
2105	*/
2106	static int rtCoreDumperDestroyCore(PRTSOLCORE pSolCore)
2107	{
2108	AssertReturn(pSolCore, VERR_INVALID_POINTER);
2109	if (!pSolCore->fIsValid)
2110	return VERR_INVALID_STATE;
2111
2112	FreeMemoryArea(pSolCore);
2113	pSolCore->fIsValid = false;
2114	return VINF_SUCCESS;
2115	}
2116
2117
2118	/**
2119	* Takes a core dump.
2120	*
2121	* @param pContext The context of the caller.
2122	* @param pszOutputFile Path of the core file. If NULL is passed, the
2123	* global path passed in RTCoreDumperSetup will
2124	* be used.
2125	* @returns IPRT status code.
2126	*/
2127	static int rtCoreDumperTakeDump(ucontext_t pContext, const char pszOutputFile)
2128	{
2129	if (!pContext)
2130	{
2131	CORELOGRELSYS((CORELOG_NAME "TakeDump: Missing context.\n"));
2132	return VERR_INVALID_POINTER;
2133	}
2134
2135	/*
2136	* Take a snapshot, then dump core to disk, all threads except this one are halted
2137	* from before taking the snapshot until writing the core is completely finished.
2138	* Any errors would resume all threads if they were halted.
2139	*/
2140	RTSOLCORE SolCore;
2141	RT_ZERO(SolCore);
2142	int rc = rtCoreDumperCreateCore(&SolCore, pContext, pszOutputFile);
2143	if (RT_SUCCESS(rc))
2144	{
2145	rc = rtCoreDumperWriteCore(&SolCore, &WriteFileNoIntr);
2146	if (RT_SUCCESS(rc))
2147	CORELOGRELSYS((CORELOG_NAME "Core dumped in %s\n", SolCore.szCorePath));
2148	else
2149	CORELOGRELSYS((CORELOG_NAME "TakeDump: WriteCore failed. szCorePath=%s rc=%Rrc\n", SolCore.szCorePath, rc));
2150
2151	rtCoreDumperDestroyCore(&SolCore);
2152	}
2153	else
2154	CORELOGRELSYS((CORELOG_NAME "TakeDump: CreateCore failed. rc=%Rrc\n", rc));
2155
2156	return rc;
2157	}
2158
2159
2160	/**
2161	* The signal handler that will be invoked to take core dumps.
2162	*
2163	* @param Sig The signal that invoked us.
2164	* @param pSigInfo The signal information.
2165	* @param pvArg Opaque pointer to the caller context structure,
2166	* this cannot be NULL.
2167	*/
2168	static void rtCoreDumperSignalHandler(int Sig, siginfo_t pSigInfo, void pvArg)
2169	{
2170	CORELOG((CORELOG_NAME "SignalHandler Sig=%d pvArg=%p\n", Sig, pvArg));
2171
2172	RTNATIVETHREAD hCurNativeThread = RTThreadNativeSelf();
2173	int rc = VERR_GENERAL_FAILURE;
2174	bool fCallSystemDump = false;
2175	bool fRc;
2176	ASMAtomicCmpXchgHandle(&g_CoreDumpThread, hCurNativeThread, NIL_RTNATIVETHREAD, fRc);
2177	if (fRc)
2178	{
2179	rc = rtCoreDumperTakeDump((ucontext_t )pvArg, NULL / Use Global Core filepath */);
2180	ASMAtomicWriteHandle(&g_CoreDumpThread, NIL_RTNATIVETHREAD);
2181
2182	if (RT_FAILURE(rc))
2183	CORELOGRELSYS((CORELOG_NAME "TakeDump failed! rc=%Rrc\n", rc));
2184	}
2185	else if (Sig == SIGSEGV \|\| Sig == SIGBUS \|\| Sig == SIGTRAP)
2186	{
2187	/*
2188	* Core dumping is already in progress and we've somehow ended up being
2189	* signalled again.
2190	*/
2191	rc = VERR_INTERNAL_ERROR;
2192
2193	/*
2194	* If our dumper has crashed. No point in waiting, trigger the system one.
2195	* Wait only when the dumping thread is not the one generating this signal.
2196	*/
2197	RTNATIVETHREAD hNativeDumperThread;
2198	ASMAtomicReadHandle(&g_CoreDumpThread, &hNativeDumperThread);
2199	if (hNativeDumperThread == RTThreadNativeSelf())
2200	{
2201	CORELOGRELSYS((CORELOG_NAME "SignalHandler: Core dumper (thread %u) crashed Sig=%d. Triggering system dump\n",
2202	RTThreadSelf(), Sig));
2203	fCallSystemDump = true;
2204	}
2205	else
2206	{
2207	/*
2208	* Some other thread in the process is triggering a crash, wait a while
2209	* to let our core dumper finish, on timeout trigger system dump.
2210	*/
2211	CORELOGRELSYS((CORELOG_NAME "SignalHandler: Core dump already in progress! Waiting a while for completion Sig=%d.\n",
2212	Sig));
2213	int64_t iTimeout = 16000; /* timeout (ms) */
2214	for (;;)
2215	{
2216	ASMAtomicReadHandle(&g_CoreDumpThread, &hNativeDumperThread);
2217	if (hNativeDumperThread == NIL_RTNATIVETHREAD)
2218	break;
2219	RTThreadSleep(200);
2220	iTimeout -= 200;
2221	if (iTimeout <= 0)
2222	break;
2223	}
2224	if (iTimeout <= 0)
2225	{
2226	fCallSystemDump = true;
2227	CORELOGRELSYS((CORELOG_NAME "SignalHandler: Core dumper seems to be stuck. Signalling new signal %d\n", Sig));
2228	}
2229	}
2230	}
2231
2232	if (Sig == SIGSEGV \|\| Sig == SIGBUS \|\| Sig == SIGTRAP)
2233	{
2234	/*
2235	* Reset signal handlers, we're not a live core we will be blown away
2236	* one way or another.
2237	*/
2238	signal(SIGSEGV, SIG_DFL);
2239	signal(SIGBUS, SIG_DFL);
2240	signal(SIGTRAP, SIG_DFL);
2241
2242	/*
2243	* Hard terminate the process if this is not a live dump without invoking
2244	* the system core dumping behaviour.
2245	*/
2246	if (RT_SUCCESS(rc))
2247	raise(SIGKILL);
2248
2249	/*
2250	* Something went wrong, fall back to the system core dumper.
2251	*/
2252	if (fCallSystemDump)
2253	abort();
2254	}
2255	}
2256
2257
2258	RTDECL(int) RTCoreDumperTakeDump(const char *pszOutputFile, bool fLiveCore)
2259	{
2260	ucontext_t Context;
2261	int rc = getcontext(&Context);
2262	if (!rc)
2263	{
2264	/*
2265	* Block SIGSEGV and co. while we write the core.
2266	*/
2267	sigset_t SigSet, OldSigSet;
2268	sigemptyset(&SigSet);
2269	sigaddset(&SigSet, SIGSEGV);
2270	sigaddset(&SigSet, SIGBUS);
2271	sigaddset(&SigSet, SIGTRAP);
2272	sigaddset(&SigSet, SIGUSR2);
2273	pthread_sigmask(SIG_BLOCK, &SigSet, &OldSigSet);
2274	rc = rtCoreDumperTakeDump(&Context, pszOutputFile);
2275	if (RT_FAILURE(rc))
2276	CORELOGRELSYS(("RTCoreDumperTakeDump: rtCoreDumperTakeDump failed rc=%Rrc\n", rc));
2277
2278	if (!fLiveCore)
2279	{
2280	signal(SIGSEGV, SIG_DFL);
2281	signal(SIGBUS, SIG_DFL);
2282	signal(SIGTRAP, SIG_DFL);
2283	if (RT_SUCCESS(rc))
2284	raise(SIGKILL);
2285	else
2286	abort();
2287	}
2288	pthread_sigmask(SIG_SETMASK, &OldSigSet, NULL);
2289	}
2290	else
2291	{
2292	CORELOGRELSYS(("RTCoreDumperTakeDump: getcontext failed rc=%d.\n", rc));
2293	rc = VERR_INVALID_CONTEXT;
2294	}
2295
2296	return rc;
2297	}
2298
2299
2300	RTDECL(int) RTCoreDumperSetup(const char *pszOutputDir, uint32_t fFlags)
2301	{
2302	/*
2303	* Validate flags.
2304	*/
2305	AssertReturn(fFlags, VERR_INVALID_PARAMETER);
2306	AssertReturn(!(fFlags & ~( RTCOREDUMPER_FLAGS_REPLACE_SYSTEM_DUMP
2307	\| RTCOREDUMPER_FLAGS_LIVE_CORE)),
2308	VERR_INVALID_PARAMETER);
2309
2310
2311	/*
2312	* Setup/change the core dump directory if specified.
2313	*/
2314	RT_ZERO(g_szCoreDumpDir);
2315	if (pszOutputDir)
2316	{
2317	if (!RTDirExists(pszOutputDir))
2318	return VERR_NOT_A_DIRECTORY;
2319	RTStrCopy(g_szCoreDumpDir, sizeof(g_szCoreDumpDir), pszOutputDir);
2320	}
2321
2322	/*
2323	* Install core dump signal handler only if the flags changed or if it's the first time.
2324	*/
2325	if ( ASMAtomicReadBool(&g_fCoreDumpSignalSetup) == false
2326	\|\| ASMAtomicReadU32(&g_fCoreDumpFlags) != fFlags)
2327	{
2328	struct sigaction sigAct;
2329	RT_ZERO(sigAct);
2330	sigAct.sa_sigaction = &rtCoreDumperSignalHandler;
2331
2332	if ( (fFlags & RTCOREDUMPER_FLAGS_REPLACE_SYSTEM_DUMP)
2333	&& !(g_fCoreDumpFlags & RTCOREDUMPER_FLAGS_REPLACE_SYSTEM_DUMP))
2334	{
2335	sigemptyset(&sigAct.sa_mask);
2336	sigAct.sa_flags = SA_RESTART \| SA_SIGINFO \| SA_NODEFER;
2337	sigaction(SIGSEGV, &sigAct, NULL);
2338	sigaction(SIGBUS, &sigAct, NULL);
2339	sigaction(SIGTRAP, &sigAct, NULL);
2340	}
2341
2342	if ( fFlags & RTCOREDUMPER_FLAGS_LIVE_CORE
2343	&& !(g_fCoreDumpFlags & RTCOREDUMPER_FLAGS_LIVE_CORE))
2344	{
2345	sigfillset(&sigAct.sa_mask); /* Block all signals while in it's signal handler */
2346	sigAct.sa_flags = SA_RESTART \| SA_SIGINFO;
2347	sigaction(SIGUSR2, &sigAct, NULL);
2348	}
2349
2350	ASMAtomicWriteU32(&g_fCoreDumpFlags, fFlags);
2351	ASMAtomicWriteBool(&g_fCoreDumpSignalSetup, true);
2352	}
2353
2354	return VINF_SUCCESS;
2355	}
2356
2357
2358	RTDECL(int) RTCoreDumperDisable(void)
2359	{
2360	/*
2361	* Remove core dump signal handler & reset variables.
2362	*/
2363	if (ASMAtomicReadBool(&g_fCoreDumpSignalSetup) == true)
2364	{
2365	signal(SIGSEGV, SIG_DFL);
2366	signal(SIGBUS, SIG_DFL);
2367	signal(SIGTRAP, SIG_DFL);
2368	signal(SIGUSR2, SIG_DFL);
2369	ASMAtomicWriteBool(&g_fCoreDumpSignalSetup, false);
2370	}
2371
2372	RT_ZERO(g_szCoreDumpDir);
2373	RT_ZERO(g_szCoreDumpFile);
2374	ASMAtomicWriteU32(&g_fCoreDumpFlags, 0);
2375	return VINF_SUCCESS;
2376	}
2377

Note: See TracBrowser for help on using the repository browser.

source: vbox/trunk/src/VBox/Runtime/r3/solaris/coredumper-solaris.cpp@ 43685

Download in other formats: