init.cpp@ 46668

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1	/* $Id: init.cpp 46593 2013-06-17 14:32:51Z vboxsync $ */
2	/** @file
3	* IPRT - Init Ring-3.
4	*/
5
6	/*
7	* Copyright (C) 2006-2013 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*
17	* 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/types.h> /* darwin: UINT32_C and others. */
33
34	#ifdef RT_OS_WINDOWS
35	# include <process.h>
36	# include <Windows.h>
37	#else
38	# include <unistd.h>
39	# ifndef RT_OS_OS2
40	# include <pthread.h>
41	# include <signal.h>
42	# include <errno.h>
43	# define IPRT_USE_SIG_CHILD_DUMMY
44	# endif
45	#endif
46	#ifdef RT_OS_OS2
47	# include <InnoTekLIBC/fork.h>
48	# define INCL_DOSMISC
49	# include <os2.h>
50	#endif
51	#include <locale.h>
52
53	#include <iprt/initterm.h>
54	#include <iprt/asm.h>
55	#include <iprt/assert.h>
56	#include <iprt/err.h>
57	#include <iprt/log.h>
58	#include <iprt/mem.h>
59	#include <iprt/path.h>
60	#include <iprt/time.h>
61	#include <iprt/string.h>
62	#include <iprt/param.h>
63	#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
64	# include <iprt/file.h>
65	# include <VBox/sup.h>
66	#endif
67	#include <stdlib.h>
68
69	#include "init.h"
70	#include "internal/alignmentchecks.h"
71	#include "internal/path.h"
72	#include "internal/process.h"
73	#include "internal/thread.h"
74	#include "internal/time.h"
75
76
77	/*******************************************************************************
78	* Global Variables *
79	*******************************************************************************/
80	/** The number of calls to RTR3Init. /
81	static int32_t volatile g_cUsers = 0;
82	/** Whether we're currently initializing the IPRT. */
83	static bool volatile g_fInitializing = false;
84
85	/** The process path.
86	* This is used by RTPathExecDir and RTProcGetExecutablePath and set by rtProcInitName. */
87	DECLHIDDEN(char) g_szrtProcExePath[RTPATH_MAX];
88	/** The length of g_szrtProcExePath. */
89	DECLHIDDEN(size_t) g_cchrtProcExePath;
90	/** The length of directory path component of g_szrtProcExePath. */
91	DECLHIDDEN(size_t) g_cchrtProcDir;
92	/** The offset of the process name into g_szrtProcExePath. */
93	DECLHIDDEN(size_t) g_offrtProcName;
94
95	/** The IPRT init flags. */
96	static uint32_t g_fInitFlags;
97
98	/** The argument count of the program. */
99	static int g_crtArgs = -1;
100	/** The arguments of the program (UTF-8). This is "leaked". */
101	static char ** g_papszrtArgs;
102	/** The original argument vector of the program. */
103	static char ** g_papszrtOrgArgs;
104
105	/**
106	* Program start nanosecond TS.
107	*/
108	DECLHIDDEN(uint64_t) g_u64ProgramStartNanoTS;
109
110	/**
111	* Program start microsecond TS.
112	*/
113	DECLHIDDEN(uint64_t) g_u64ProgramStartMicroTS;
114
115	/**
116	* Program start millisecond TS.
117	*/
118	DECLHIDDEN(uint64_t) g_u64ProgramStartMilliTS;
119
120	/**
121	* The process identifier of the running process.
122	*/
123	DECLHIDDEN(RTPROCESS) g_ProcessSelf = NIL_RTPROCESS;
124
125	/**
126	* The current process priority.
127	*/
128	DECLHIDDEN(RTPROCPRIORITY) g_enmProcessPriority = RTPROCPRIORITY_DEFAULT;
129
130	/**
131	* Set if the atexit callback has been called, i.e. indicating
132	* that the process is terminating.
133	*/
134	DECLHIDDEN(bool volatile) g_frtAtExitCalled = false;
135
136	#ifdef IPRT_WITH_ALIGNMENT_CHECKS
137	/**
138	* Whether alignment checks are enabled.
139	* This is set if the environment variable IPRT_ALIGNMENT_CHECKS is 1.
140	*/
141	RTDATADECL(bool) g_fRTAlignmentChecks = false;
142	#endif
143
144
145	#if defined(RT_OS_DARWIN) \|\| defined(RT_OS_FREEBSD) \|\| defined(RT_OS_HAIKU) \
146	\|\| defined(RT_OS_LINUX) \|\| defined(RT_OS_OS2) \|\| defined(RT_OS_SOLARIS) /** @todo add host init hooks everywhere. */
147	/* Stubs */
148	DECLHIDDEN(int) rtR3InitNativeFirst(uint32_t fFlags) { return VINF_SUCCESS; }
149	DECLHIDDEN(int) rtR3InitNativeFinal(uint32_t fFlags) { return VINF_SUCCESS; }
150	DECLHIDDEN(void) rtR3InitNativeObtrusive(void) { }
151	#endif
152
153
154	/**
155	* atexit callback.
156	*
157	* This makes sure any loggers are flushed and will later also work the
158	* termination callback chain.
159	*/
160	static void rtR3ExitCallback(void)
161	{
162	ASMAtomicWriteBool(&g_frtAtExitCalled, true);
163
164	if (g_cUsers > 0)
165	{
166	PRTLOGGER pLogger = RTLogGetDefaultInstance();
167	if (pLogger)
168	RTLogFlush(pLogger);
169
170	pLogger = RTLogRelDefaultInstance();
171	if (pLogger)
172	RTLogFlush(pLogger);
173	}
174	}
175
176
177	#ifndef RT_OS_WINDOWS
178	/**
179	* Fork callback, child context.
180	*/
181	static void rtR3ForkChildCallback(void)
182	{
183	g_ProcessSelf = getpid();
184	}
185	#endif /* RT_OS_WINDOWS */
186
187	#ifdef RT_OS_OS2
188	/** Fork completion callback for OS/2. Only called in the child. */
189	static void rtR3ForkOs2ChildCompletionCallback(void *pvArg, int rc, __LIBC_FORKCTX enmCtx)
190	{
191	Assert(enmCtx == __LIBC_FORK_CTX_CHILD); NOREF(enmCtx);
192	NOREF(pvArg);
193
194	if (!rc)
195	rtR3ForkChildCallback();
196	}
197
198	/** Low-level fork callback for OS/2. */
199	int rtR3ForkOs2Child(__LIBC_PFORKHANDLE pForkHandle, __LIBC_FORKOP enmOperation)
200	{
201	if (enmOperation == __LIBC_FORK_OP_EXEC_CHILD)
202	return pForkHandle->pfnCompletionCallback(pForkHandle, rtR3ForkOs2ChildCompletionCallback, NULL, __LIBC_FORK_CTX_CHILD);
203	return 0;
204	}
205
206	# define static static volatile /** @todo _FORK_CHILD1 causes unresolved externals in optimized builds. Fix macro. */
207	_FORK_CHILD1(0, rtR3ForkOs2Child);
208	# undef static
209	#endif /* RT_OS_OS2 */
210
211
212
213	/**
214	* Internal worker which initializes or re-initializes the
215	* program path, name and directory globals.
216	*
217	* @returns IPRT status code.
218	* @param pszProgramPath The program path, NULL if not specified.
219	*/
220	static int rtR3InitProgramPath(const char *pszProgramPath)
221	{
222	/*
223	* We're reserving 32 bytes here for file names as what not.
224	*/
225	if (!pszProgramPath)
226	{
227	int rc = rtProcInitExePath(g_szrtProcExePath, sizeof(g_szrtProcExePath) - 32);
228	if (RT_FAILURE(rc))
229	return rc;
230	}
231	else
232	{
233	size_t cch = strlen(pszProgramPath);
234	Assert(cch > 1);
235	AssertMsgReturn(cch < sizeof(g_szrtProcExePath) - 32, ("%zu\n", cch), VERR_BUFFER_OVERFLOW);
236	memcpy(g_szrtProcExePath, pszProgramPath, cch + 1);
237	}
238
239	/*
240	* Parse the name.
241	*/
242	ssize_t offName;
243	g_cchrtProcExePath = RTPathParseSimple(g_szrtProcExePath, &g_cchrtProcDir, &offName, NULL);
244	g_offrtProcName = offName;
245	return VINF_SUCCESS;
246	}
247
248
249	/**
250	* Internal worker which initializes or re-initializes the
251	* program path, name and directory globals.
252	*
253	* @returns IPRT status code.
254	* @param fFlags Flags, see RTR3INIT_XXX.
255	* @param cArgs Pointer to the argument count.
256	* @param ppapszArgs Pointer to the argument vector pointer. NULL
257	* allowed if @a cArgs is 0.
258	*/
259	static int rtR3InitArgv(uint32_t fFlags, int cArgs, char ***ppapszArgs)
260	{
261	NOREF(fFlags);
262	if (cArgs)
263	{
264	AssertPtr(ppapszArgs);
265	AssertPtr(*ppapszArgs);
266	char *papszOrgArgs = ppapszArgs;
267
268	/*
269	* Normally we should only be asked to convert arguments once. If we
270	* are though, it should be the already convered arguments.
271	*/
272	if (g_crtArgs != -1)
273	{
274	AssertReturn( g_crtArgs == cArgs
275	&& g_papszrtArgs == papszOrgArgs,
276	VERR_WRONG_ORDER); /* only init once! */
277	return VINF_SUCCESS;
278	}
279
280	/*
281	* Convert the arguments.
282	*/
283	char papszArgs = (char )RTMemAllocZ((cArgs + 1) * sizeof(char *));
284	if (!papszArgs)
285	return VERR_NO_MEMORY;
286
287	#ifdef RT_OS_WINDOWS
288	/* HACK ALERT! Try convert from unicode versions if possible.
289	Unfortunately for us, __wargv is only initialized if we have a
290	unicode main function. So, we have to use CommandLineToArgvW to get
291	something similar. It should do the same conversion... :-) */
292	int cArgsW = -1;
293	PWSTR *papwszArgs = NULL;
294	if ( papszOrgArgs == __argv
295	&& cArgs == __argc
296	&& (papwszArgs = CommandLineToArgvW(GetCommandLineW(), &cArgsW)) != NULL )
297	{
298	AssertMsg(cArgsW == cArgs, ("%d vs %d\n", cArgsW, cArgs));
299	for (int i = 0; i < cArgs; i++)
300	{
301	int rc = RTUtf16ToUtf8(papwszArgs[i], &papszArgs[i]);
302	if (RT_FAILURE(rc))
303	{
304	while (i--)
305	RTStrFree(papszArgs[i]);
306	RTMemFree(papszArgs);
307	LocalFree(papwszArgs);
308	return rc;
309	}
310	}
311	LocalFree(papwszArgs);
312	}
313	else
314	#endif
315	{
316	for (int i = 0; i < cArgs; i++)
317	{
318	int rc = RTStrCurrentCPToUtf8(&papszArgs[i], papszOrgArgs[i]);
319	if (RT_FAILURE(rc))
320	{
321	while (i--)
322	RTStrFree(papszArgs[i]);
323	RTMemFree(papszArgs);
324	return rc;
325	}
326	}
327	}
328
329	papszArgs[cArgs] = NULL;
330
331	g_papszrtOrgArgs = papszOrgArgs;
332	g_papszrtArgs = papszArgs;
333	g_crtArgs = cArgs;
334
335	*ppapszArgs = papszArgs;
336	}
337
338	return VINF_SUCCESS;
339	}
340
341
342	#ifdef IPRT_USE_SIG_CHILD_DUMMY
343	/**
344	* Dummy SIGCHILD handler.
345	*
346	* Assigned on rtR3Init only when SIGCHILD handler is set SIGIGN or SIGDEF to
347	* ensure waitpid works properly for the terminated processes.
348	*/
349	static void rtR3SigChildHandler(int iSignal)
350	{
351	NOREF(iSignal);
352	}
353	#endif /* IPRT_USE_SIG_CHILD_DUMMY */
354
355
356	/**
357	* rtR3Init worker.
358	*/
359	static int rtR3InitBody(uint32_t fFlags, int cArgs, char **papszArgs, const char pszProgramPath)
360	{
361	/*
362	* Early native initialization.
363	*/
364	int rc = rtR3InitNativeFirst(fFlags);
365	AssertMsgRCReturn(rc, ("rtR3InitNativeFirst failed with %Rrc\n", rc), rc);
366
367	/*
368	* Disable error popups.
369	*/
370	#if defined(RT_OS_OS2) /** @todo move to private code. */
371	DosError(FERR_DISABLEHARDERR);
372	#endif
373
374	/*
375	* Init C runtime locale before we do anything that may end up converting
376	* paths or we'll end up using the "C" locale for path conversion.
377	*/
378	setlocale(LC_CTYPE, "");
379
380	/*
381	* The Process ID.
382	*/
383	#ifdef _MSC_VER
384	g_ProcessSelf = _getpid(); /* crappy ansi compiler */
385	#else
386	g_ProcessSelf = getpid();
387	#endif
388
389	/*
390	* Save the init flags.
391	*/
392	g_fInitFlags \|= fFlags;
393
394	#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
395	# ifdef VBOX
396	/*
397	* This MUST be done as the very first thing, before any file is opened.
398	* The log is opened on demand, but the first log entries may be caused
399	* by rtThreadInit() below.
400	*/
401	const char *pszDisableHostCache = getenv("VBOX_DISABLE_HOST_DISK_CACHE");
402	if ( pszDisableHostCache != NULL
403	&& *pszDisableHostCache
404	&& strcmp(pszDisableHostCache, "0") != 0)
405	{
406	RTFileSetForceFlags(RTFILE_O_WRITE, RTFILE_O_WRITE_THROUGH, 0);
407	RTFileSetForceFlags(RTFILE_O_READWRITE, RTFILE_O_WRITE_THROUGH, 0);
408	}
409	# endif /* VBOX */
410	#endif /* !IN_GUEST && !RT_NO_GIP */
411
412	/*
413	* Thread Thread database and adopt the caller thread as 'main'.
414	* This must be done before everything else or else we'll call into threading
415	* without having initialized TLS entries and suchlike.
416	*/
417	rc = rtThreadInit();
418	AssertMsgRCReturn(rc, ("Failed to initialize threads, rc=%Rrc!\n", rc), rc);
419
420	#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
421	if (fFlags & RTR3INIT_FLAGS_SUPLIB)
422	{
423	/*
424	* Init GIP first.
425	* (The more time for updates before real use, the better.)
426	*/
427	rc = SUPR3Init(NULL);
428	AssertMsgRCReturn(rc, ("Failed to initializable the support library, rc=%Rrc!\n", rc), rc);
429	}
430	#endif
431
432	/*
433	* The executable path, name and directory. Convert arguments.
434	*/
435	rc = rtR3InitProgramPath(pszProgramPath);
436	AssertLogRelMsgRCReturn(rc, ("Failed to get executable directory path, rc=%Rrc!\n", rc), rc);
437
438	rc = rtR3InitArgv(fFlags, cArgs, papszArgs);
439	AssertLogRelMsgRCReturn(rc, ("Failed to convert the arguments, rc=%Rrc!\n", rc), rc);
440
441	#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
442	/*
443	* The threading is initialized we can safely sleep a bit if GIP
444	* needs some time to update itself updating.
445	*/
446	if ((fFlags & RTR3INIT_FLAGS_SUPLIB) && g_pSUPGlobalInfoPage)
447	{
448	RTThreadSleep(20);
449	RTTimeNanoTS();
450	}
451	#endif
452
453	/*
454	* Init the program start TSes.
455	* Do that here to be sure that the GIP time was properly updated the 1st time.
456	*/
457	g_u64ProgramStartNanoTS = RTTimeNanoTS();
458	g_u64ProgramStartMicroTS = g_u64ProgramStartNanoTS / 1000;
459	g_u64ProgramStartMilliTS = g_u64ProgramStartNanoTS / 1000000;
460
461	/*
462	* The remainder cannot easily be undone, so it has to go last.
463	*/
464
465	/* Fork and exit callbacks. */
466	#if !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2)
467	rc = pthread_atfork(NULL, NULL, rtR3ForkChildCallback);
468	AssertMsg(rc == 0, ("%d\n", rc));
469	#endif
470	atexit(rtR3ExitCallback);
471
472	#ifdef IPRT_USE_SIG_CHILD_DUMMY
473	/*
474	* SIGCHLD must not be ignored (that's default), otherwise posix compliant waitpid
475	* implementations won't work right.
476	*/
477	for (;;)
478	{
479	struct sigaction saOld;
480	rc = sigaction(SIGCHLD, 0, &saOld); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
481	if ( rc != 0
482	\|\| (saOld.sa_flags & SA_SIGINFO)
483	\|\| ( saOld.sa_handler != SIG_IGN
484	&& saOld.sa_handler != SIG_DFL)
485	)
486	break;
487
488	/* Try install dummy handler. */
489	struct sigaction saNew = saOld;
490	saNew.sa_flags = SA_NOCLDSTOP \| SA_RESTART;
491	saNew.sa_handler = rtR3SigChildHandler;
492	rc = sigemptyset(&saNew.sa_mask); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
493	struct sigaction saOld2;
494	rc = sigaction(SIGCHLD, &saNew, &saOld2); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
495	if ( rc != 0
496	\|\| ( saOld2.sa_handler == saOld.sa_handler
497	&& !(saOld2.sa_flags & SA_SIGINFO))
498	)
499	break;
500
501	/* Race during dynamic load, restore and try again... */
502	sigaction(SIGCHLD, &saOld2, NULL);
503	RTThreadYield();
504	}
505	#endif /* IPRT_USE_SIG_CHILD_DUMMY */
506
507	#ifdef IPRT_WITH_ALIGNMENT_CHECKS
508	/*
509	* Enable alignment checks.
510	*/
511	const char *pszAlignmentChecks = getenv("IPRT_ALIGNMENT_CHECKS");
512	g_fRTAlignmentChecks = pszAlignmentChecks != NULL
513	&& pszAlignmentChecks[0] == '1'
514	&& pszAlignmentChecks[1] == '\0';
515	if (g_fRTAlignmentChecks)
516	IPRT_ALIGNMENT_CHECKS_ENABLE();
517	#endif
518
519	/*
520	* Final native initialization.
521	*/
522	rc = rtR3InitNativeFinal(fFlags);
523	AssertMsgRCReturn(rc, ("rtR3InitNativeFinal failed with %Rrc\n", rc), rc);
524
525	return VINF_SUCCESS;
526	}
527
528
529	/**
530	* Internal initialization worker.
531	*
532	* @returns IPRT status code.
533	* @param fFlags Flags, see RTR3INIT_XXX.
534	* @param cArgs Pointer to the argument count.
535	* @param ppapszArgs Pointer to the argument vector pointer. NULL
536	* allowed if @a cArgs is 0.
537	* @param pszProgramPath The program path. Pass NULL if we're to figure it
538	* out ourselves.
539	*/
540	static int rtR3Init(uint32_t fFlags, int cArgs, char **papszArgs, const char pszProgramPath)
541	{
542	/* no entry log flow, because prefixes and thread may freak out. */
543	Assert(!(fFlags & ~( RTR3INIT_FLAGS_DLL
544	\| RTR3INIT_FLAGS_SUPLIB
545	\| RTR3INIT_FLAGS_UNOBTRUSIVE)));
546	Assert(!(fFlags & RTR3INIT_FLAGS_DLL) \|\| cArgs == 0);
547
548	/*
549	* Do reference counting, only initialize the first time around.
550	*
551	* We are ASSUMING that nobody will be able to race RTR3Init* calls when the
552	* first one, the real init, is running (second assertion).
553	*/
554	int32_t cUsers = ASMAtomicIncS32(&g_cUsers);
555	if (cUsers != 1)
556	{
557	AssertMsg(cUsers > 1, ("%d\n", cUsers));
558	Assert(!g_fInitializing);
559	#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
560	if (fFlags & RTR3INIT_FLAGS_SUPLIB)
561	{
562	SUPR3Init(NULL);
563	g_fInitFlags \|= RTR3INIT_FLAGS_SUPLIB;
564	}
565	#endif
566
567	if ( !(fFlags & RTR3INIT_FLAGS_UNOBTRUSIVE)
568	&& (g_fInitFlags & RTR3INIT_FLAGS_UNOBTRUSIVE))
569	{
570	g_fInitFlags &= ~RTR3INIT_FLAGS_UNOBTRUSIVE;
571	rtR3InitNativeObtrusive();
572	rtThreadReInitObtrusive();
573	}
574
575	int rc = VINF_SUCCESS;
576	if (pszProgramPath)
577	rc = rtR3InitProgramPath(pszProgramPath);
578	if (RT_SUCCESS(rc))
579	rc = rtR3InitArgv(fFlags, cArgs, papszArgs);
580	return rc;
581	}
582	ASMAtomicWriteBool(&g_fInitializing, true);
583
584	/*
585	* Do the initialization.
586	*/
587	int rc = rtR3InitBody(fFlags, cArgs, papszArgs, pszProgramPath);
588	if (RT_FAILURE(rc))
589	{
590	/* failure */
591	ASMAtomicWriteBool(&g_fInitializing, false);
592	ASMAtomicDecS32(&g_cUsers);
593	return rc;
594	}
595
596	/* success */
597	LogFlow(("rtR3Init: returns VINF_SUCCESS\n"));
598	ASMAtomicWriteBool(&g_fInitializing, false);
599	return VINF_SUCCESS;
600	}
601
602
603	RTR3DECL(int) RTR3InitExe(int cArgs, char ***papszArgs, uint32_t fFlags)
604	{
605	Assert(!(fFlags & RTR3INIT_FLAGS_DLL));
606	return rtR3Init(fFlags, cArgs, papszArgs, NULL);
607	}
608
609
610	RTR3DECL(int) RTR3InitExeNoArguments(uint32_t fFlags)
611	{
612	Assert(!(fFlags & RTR3INIT_FLAGS_DLL));
613	return rtR3Init(fFlags, 0, NULL, NULL);
614	}
615
616
617	RTR3DECL(int) RTR3InitDll(uint32_t fFlags)
618	{
619	Assert(!(fFlags & RTR3INIT_FLAGS_DLL));
620	return rtR3Init(fFlags \| RTR3INIT_FLAGS_DLL, 0, NULL, NULL);
621	}
622
623
624	RTR3DECL(int) RTR3InitEx(uint32_t iVersion, uint32_t fFlags, int cArgs, char **papszArgs, const char pszProgramPath)
625	{
626	AssertReturn(iVersion == RTR3INIT_VER_CUR, VERR_NOT_SUPPORTED);
627	return rtR3Init(fFlags, cArgs, papszArgs, pszProgramPath);
628	}
629
630	RTR3DECL(bool) RTR3InitIsUnobtrusive(void)
631	{
632	return RT_BOOL(g_fInitFlags & RTR3INIT_FLAGS_UNOBTRUSIVE);
633	}
634
635	#if 0 /** @todo implement RTR3Term. */
636	RTR3DECL(void) RTR3Term(void)
637	{
638	}
639	#endif
640

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source: vbox/trunk/src/VBox/Runtime/r3/init.cpp@ 46668

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