/**
* Internal initialization worker.
*
* @returns IPRT status code.
* @param fFlags Flags, see RTR3INIT_XXX.
* @param cArgs Pointer to the argument count.
* @param ppapszArgs Pointer to the argument vector pointer. NULL
* allowed if @a cArgs is 0.
* @param pszProgramPath The program path. Pass NULL if we're to figure it
* out ourselves.
*/
static int rtR3Init(uint32_t fFlags, int cArgs, char ***papszArgs, const char *pszProgramPath)
{
/* no entry log flow, because prefixes and thread may freak out. */
Assert(!(fFlags & ~(RTR3INIT_FLAGS_DLL | RTR3INIT_FLAGS_SUPLIB)));
Assert(!(fFlags & RTR3INIT_FLAGS_DLL) || cArgs == 0);
/*
* Do reference counting, only initialize the first time around.
*
* We are ASSUMING that nobody will be able to race RTR3Init* calls when the
* first one, the real init, is running (second assertion).
*/
int32_t cUsers = ASMAtomicIncS32(&g_cUsers);
if (cUsers != 1)
{
AssertMsg(cUsers > 1, ("%d\n", cUsers));
Assert(!g_fInitializing);
#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
if (fFlags & RTR3INIT_FLAGS_SUPLIB)
SUPR3Init(NULL);
#endif
if (!pszProgramPath)
return VINF_SUCCESS;
int rc = rtR3InitProgramPath(pszProgramPath);
if (RT_SUCCESS(rc))
rc = rtR3InitArgv(fFlags, cArgs, papszArgs);
return rc;
}
ASMAtomicWriteBool(&g_fInitializing, true);
/*
* Do the initialization.
*/
int rc = rtR3InitBody(fFlags, cArgs, papszArgs, pszProgramPath);
if (RT_FAILURE(rc))
{
/* failure */
ASMAtomicWriteBool(&g_fInitializing, false);
ASMAtomicDecS32(&g_cUsers);
return rc;
}
/* success */
LogFlow(("rtR3Init: returns VINF_SUCCESS\n"));
ASMAtomicWriteBool(&g_fInitializing, false);
return VINF_SUCCESS;
}
/**
* rtR3Init worker.
*/
static int rtR3InitBody(uint32_t fFlags, int cArgs, char ***papszArgs, const char *pszProgramPath)
{
/*
* Early native initialization.
*/
int rc = rtR3InitNativeFirst(fFlags);
AssertMsgRCReturn(rc, ("rtR3InitNativeFirst failed with %Rrc\n", rc), rc);
/*
* Disable error popups.
*/
#if defined(RT_OS_OS2) /** @todo move to private code. */
DosError(FERR_DISABLEHARDERR);
#endif
/*
* Init C runtime locale before we do anything that may end up converting
* paths or we'll end up using the "C" locale for path conversion.
*/
setlocale(LC_CTYPE, "");
/*
* The Process ID.
*/
#ifdef _MSC_VER
g_ProcessSelf = _getpid(); /* crappy ansi compiler */
#else
g_ProcessSelf = getpid();
#endif
/*
* Save the init flags.
*/
g_fInitFlags |= fFlags;
#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
# ifdef VBOX
/*
* This MUST be done as the very first thing, before any file is opened.
* The log is opened on demand, but the first log entries may be caused
* by rtThreadInit() below.
*/
const char *pszDisableHostCache = getenv("VBOX_DISABLE_HOST_DISK_CACHE");
if ( pszDisableHostCache != NULL
&& *pszDisableHostCache
&& strcmp(pszDisableHostCache, "0") != 0)
{
RTFileSetForceFlags(RTFILE_O_WRITE, RTFILE_O_WRITE_THROUGH, 0);
RTFileSetForceFlags(RTFILE_O_READWRITE, RTFILE_O_WRITE_THROUGH, 0);
}
# endif /* VBOX */
#endif /* !IN_GUEST && !RT_NO_GIP */
/*
* Thread Thread database and adopt the caller thread as 'main'.
* This must be done before everything else or else we'll call into threading
* without having initialized TLS entries and suchlike.
*/
rc = rtThreadInit();
AssertMsgRCReturn(rc, ("Failed to initialize threads, rc=%Rrc!\n", rc), rc);
#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
if (fFlags & RTR3INIT_FLAGS_SUPLIB)
{
/*
* Init GIP first.
* (The more time for updates before real use, the better.)
*/
rc = SUPR3Init(NULL);
AssertMsgRCReturn(rc, ("Failed to initializable the support library, rc=%Rrc!\n", rc), rc);
}
#endif
/*
* The executable path, name and directory. Convert arguments.
*/
rc = rtR3InitProgramPath(pszProgramPath);
AssertLogRelMsgRCReturn(rc, ("Failed to get executable directory path, rc=%Rrc!\n", rc), rc);
rc = rtR3InitArgv(fFlags, cArgs, papszArgs);
AssertLogRelMsgRCReturn(rc, ("Failed to convert the arguments, rc=%Rrc!\n", rc), rc);
#if !defined(IN_GUEST) && !defined(RT_NO_GIP)
/*
* The threading is initialized we can safely sleep a bit if GIP
* needs some time to update itself updating.
*/
if ((fFlags & RTR3INIT_FLAGS_SUPLIB) && g_pSUPGlobalInfoPage)
{
RTThreadSleep(20);
RTTimeNanoTS();
}
#endif
/*
* Init the program start TSes.
* Do that here to be sure that the GIP time was properly updated the 1st time.
*/
g_u64ProgramStartNanoTS = RTTimeNanoTS();
g_u64ProgramStartMicroTS = g_u64ProgramStartNanoTS / 1000;
g_u64ProgramStartMilliTS = g_u64ProgramStartNanoTS / 1000000;
/*
* The remainder cannot easily be undone, so it has to go last.
*/
/* Fork and exit callbacks. */
#if !defined(RT_OS_WINDOWS) && !defined(RT_OS_OS2)
rc = pthread_atfork(NULL, NULL, rtR3ForkChildCallback);
AssertMsg(rc == 0, ("%d\n", rc));
#endif
atexit(rtR3ExitCallback);
#ifdef IPRT_USE_SIG_CHILD_DUMMY
/*
* SIGCHLD must not be ignored (that's default), otherwise posix compliant waitpid
* implementations won't work right.
*/
for (;;)
{
struct sigaction saOld;
rc = sigaction(SIGCHLD, 0, &saOld); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
if ( rc != 0
|| (saOld.sa_flags & SA_SIGINFO)
|| ( saOld.sa_handler != SIG_IGN
&& saOld.sa_handler != SIG_DFL)
)
break;
/* Try install dummy handler. */
struct sigaction saNew = saOld;
saNew.sa_flags = SA_NOCLDSTOP | SA_RESTART;
saNew.sa_handler = rtR3SigChildHandler;
rc = sigemptyset(&saNew.sa_mask); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
struct sigaction saOld2;
rc = sigaction(SIGCHLD, &saNew, &saOld2); AssertMsg(rc == 0, ("%d/%d\n", rc, errno));
if ( rc != 0
|| ( saOld2.sa_handler == saOld.sa_handler
&& !(saOld2.sa_flags & SA_SIGINFO))
)
break;
/* Race during dynamic load, restore and try again... */
sigaction(SIGCHLD, &saOld2, NULL);
RTThreadYield();
}
#endif /* IPRT_USE_SIG_CHILD_DUMMY */
#ifdef IPRT_WITH_ALIGNMENT_CHECKS
/*
* Enable alignment checks.
*/
const char *pszAlignmentChecks = getenv("IPRT_ALIGNMENT_CHECKS");
g_fRTAlignmentChecks = pszAlignmentChecks != NULL
&& pszAlignmentChecks[0] == '1'
&& pszAlignmentChecks[1] == '\0';
if (g_fRTAlignmentChecks)
IPRT_ALIGNMENT_CHECKS_ENABLE();
#endif
/*
* Final native initialization.
*/
rc = rtR3InitNativeFinal(fFlags);
AssertMsgRCReturn(rc, ("rtR3InitNativeFinal failed with %Rrc\n", rc), rc);
return VINF_SUCCESS;
}
