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|
// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
/*++
Module Name:
init/pal.cpp
Abstract:
Implementation of PAL exported functions not part of the Win32 API.
--*/
#include "pal/thread.hpp"
#include "pal/synchobjects.hpp"
#include "pal/procobj.hpp"
#include "pal/cs.hpp"
#include "pal/file.hpp"
#include "pal/map.hpp"
#include "../objmgr/shmobjectmanager.hpp"
#include "pal/seh.hpp"
#include "pal/palinternal.h"
#include "pal/dbgmsg.h"
#include "pal/shmemory.h"
#include "pal/process.h"
#include "../thread/procprivate.hpp"
#include "pal/module.h"
#include "pal/virtual.h"
#include "pal/misc.h"
#include "pal/environ.h"
#include "pal/utils.h"
#include "pal/debug.h"
#include "pal/locale.h"
#include "pal/init.h"
#if HAVE_MACH_EXCEPTIONS
#include "../exception/machexception.h"
#endif
#include <stdlib.h>
#include <unistd.h>
#include <pwd.h>
#include <errno.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/resource.h>
#include <sys/stat.h>
#include <limits.h>
#include <string.h>
#include <fcntl.h>
#if HAVE_POLL
#include <poll.h>
#else
#include "pal/fakepoll.h"
#endif // HAVE_POLL
#if defined(__APPLE__)
#include <sys/sysctl.h>
int CacheLineSize;
#endif //__APPLE__
#ifdef __APPLE__
#include <mach-o/dyld.h>
#endif // __APPLE__
using namespace CorUnix;
//
// $$TODO The C++ compiler doesn't like pal/cruntime.h so duplicate the
// necessary prototype here
//
extern "C" BOOL CRTInitStdStreams( void );
SET_DEFAULT_DEBUG_CHANNEL(PAL);
Volatile<INT> init_count = 0;
Volatile<BOOL> shutdown_intent = 0;
Volatile<LONG> g_coreclrInitialized = 0;
static BOOL g_fThreadDataAvailable = FALSE;
static pthread_mutex_t init_critsec_mutex = PTHREAD_MUTEX_INITIALIZER;
/* critical section to protect access to init_count. This is allocated on the
very first PAL_Initialize call, and is freed afterward. */
static PCRITICAL_SECTION init_critsec = NULL;
static int Initialize(int argc, const char *const argv[], DWORD flags);
static BOOL INIT_IncreaseDescriptorLimit(void);
static LPWSTR INIT_FormatCommandLine (int argc, const char * const *argv);
static LPWSTR INIT_FindEXEPath(LPCSTR exe_name);
#ifdef _DEBUG
extern void PROCDumpThreadList(void);
#endif
#if defined(__APPLE__)
static bool RunningNatively()
{
int ret = 0;
size_t sz = sizeof(ret);
if (sysctlbyname("sysctl.proc_native", &ret, &sz, NULL, 0) != 0)
{
// if the sysctl failed, we'll assume this OS does not support
// binary translation - so we must be running natively.
return true;
}
return ret != 0;
}
#endif // __APPLE__
/*++
Function:
PAL_Initialize
Abstract:
This function is the first function of the PAL to be called.
Internal structure initialization is done here. It could be called
several time by the same process, a reference count is kept.
Return:
0 if successful
-1 if it failed
--*/
int
PALAPI
PAL_Initialize(
int argc,
const char *const argv[])
{
return Initialize(argc, argv, PAL_INITIALIZE);
}
/*++
Function:
PAL_InitializeDLL
Abstract:
Initializes the non-runtime DLLs/modules like the DAC and SOS.
Return:
0 if successful
-1 if it failed
--*/
int
PALAPI
PAL_InitializeDLL()
{
return Initialize(0, NULL, PAL_INITIALIZE_DLL);
}
/*++
Function:
Initialize
Abstract:
Common PAL initialization function.
Return:
0 if successful
-1 if it failed
--*/
int
Initialize(
int argc,
const char *const argv[],
DWORD flags)
{
PAL_ERROR palError = ERROR_GEN_FAILURE;
CPalThread *pThread = NULL;
CSharedMemoryObjectManager *pshmom = NULL;
LPWSTR command_line = NULL;
LPWSTR exe_path = NULL;
int retval = -1;
bool fFirstTimeInit = false;
/* the first ENTRY within the first call to PAL_Initialize is a special
case, since debug channels are not initialized yet. So in that case the
ENTRY will be called after the DBG channels initialization */
ENTRY_EXTERNAL("PAL_Initialize(argc = %d argv = %p)\n", argc, argv);
/*Firstly initiate a lastError */
SetLastError(ERROR_GEN_FAILURE);
#ifdef __APPLE__
if (!RunningNatively())
{
SetLastError(ERROR_BAD_FORMAT);
goto exit;
}
#endif // __APPLE__
CriticalSectionSubSysInitialize();
if(NULL == init_critsec)
{
pthread_mutex_lock(&init_critsec_mutex); // prevents race condition of two threads
// initializing the critical section.
if(NULL == init_critsec)
{
static CRITICAL_SECTION temp_critsec;
// Want this critical section to NOT be internal to avoid the use of unsafe region markers.
InternalInitializeCriticalSectionAndSpinCount(&temp_critsec, 0, false);
if(NULL != InterlockedCompareExchangePointer(&init_critsec, &temp_critsec, NULL))
{
// Another thread got in before us! shouldn't happen, if the PAL
// isn't initialized there shouldn't be any other threads
WARN("Another thread initialized the critical section\n");
InternalDeleteCriticalSection(&temp_critsec);
}
}
pthread_mutex_unlock(&init_critsec_mutex);
}
InternalEnterCriticalSection(pThread, init_critsec); // here pThread is always NULL
if (init_count == 0)
{
// Set our pid.
gPID = getpid();
fFirstTimeInit = true;
// Initialize the TLS lookaside cache
if (FALSE == TLSInitialize())
{
goto done;
}
// Initialize the environment.
if (FALSE == EnvironInitialize())
{
goto CLEANUP0;
}
// Initialize debug channel settings before anything else.
// This depends on the environment, so it must come after
// EnvironInitialize.
if (FALSE == DBG_init_channels())
{
goto CLEANUP0;
}
#if _DEBUG
// Verify that our page size is what we think it is. If it's
// different, we can't run.
if (VIRTUAL_PAGE_SIZE != getpagesize())
{
ASSERT("VIRTUAL_PAGE_SIZE is incorrect for this system!\n"
"Change include/pal/virtual.h and clr/src/inc/stdmacros.h "
"to reflect the correct page size of %d.\n", getpagesize());
}
#endif // _DEBUG
if (!INIT_IncreaseDescriptorLimit())
{
ERROR("Unable to increase the file descriptor limit!\n");
// We can continue if this fails; we'll just have problems if
// we use large numbers of threads or have many open files.
}
/* initialize the shared memory infrastructure */
if (!SHMInitialize())
{
ERROR("Shared memory initialization failed!\n");
goto CLEANUP0;
}
//
// Initialize global process data
//
palError = InitializeProcessData();
if (NO_ERROR != palError)
{
ERROR("Unable to initialize process data\n");
goto CLEANUP1;
}
#if HAVE_MACH_EXCEPTIONS
// Mach exception port needs to be set up before the thread
// data or threads are set up.
if (!SEHInitializeMachExceptions())
{
ERROR("SEHInitializeMachExceptions failed!\n");
palError = ERROR_GEN_FAILURE;
goto CLEANUP1;
}
#endif // HAVE_MACH_EXCEPTIONS
//
// Initialize global thread data
//
palError = InitializeGlobalThreadData();
if (NO_ERROR != palError)
{
ERROR("Unable to initialize thread data\n");
goto CLEANUP1;
}
//
// Allocate the initial thread data
//
palError = CreateThreadData(&pThread);
if (NO_ERROR != palError)
{
ERROR("Unable to create initial thread data\n");
goto CLEANUP1a;
}
PROCAddThread(pThread, pThread);
//
// Initialize mutex and condition variable used to synchronize the ending threads count
//
palError = InitializeEndingThreadsData();
if (NO_ERROR != palError)
{
ERROR("Unable to create ending threads data\n");
goto CLEANUP1b;
}
//
// It's now safe to access our thread data
//
g_fThreadDataAvailable = TRUE;
//
// Initialize module manager
//
if (FALSE == LOADInitializeModules())
{
ERROR("Unable to initialize module manager\n");
palError = ERROR_INTERNAL_ERROR;
goto CLEANUP1b;
}
//
// Initialize the object manager
//
pshmom = InternalNew<CSharedMemoryObjectManager>();
if (NULL == pshmom)
{
ERROR("Unable to allocate new object manager\n");
palError = ERROR_OUTOFMEMORY;
goto CLEANUP1b;
}
palError = pshmom->Initialize();
if (NO_ERROR != palError)
{
ERROR("object manager initialization failed!\n");
InternalDelete(pshmom);
goto CLEANUP1b;
}
g_pObjectManager = pshmom;
//
// Initialize the synchronization manager
//
g_pSynchronizationManager =
CPalSynchMgrController::CreatePalSynchronizationManager();
if (NULL == g_pSynchronizationManager)
{
palError = ERROR_NOT_ENOUGH_MEMORY;
ERROR("Failure creating synchronization manager\n");
goto CLEANUP1c;
}
}
else
{
pThread = InternalGetCurrentThread();
}
palError = ERROR_GEN_FAILURE;
if (argc > 0 && argv != NULL)
{
/* build the command line */
command_line = INIT_FormatCommandLine(argc, argv);
if (NULL == command_line)
{
ERROR("Error building command line\n");
goto CLEANUP1d;
}
/* find out the application's full path */
exe_path = INIT_FindEXEPath(argv[0]);
if (NULL == exe_path)
{
ERROR("Unable to find exe path\n");
goto CLEANUP1e;
}
if (NULL == command_line || NULL == exe_path)
{
ERROR("Failed to process command-line parameters!\n");
goto CLEANUP2;
}
palError = InitializeProcessCommandLine(
command_line,
exe_path);
if (NO_ERROR != palError)
{
ERROR("Unable to initialize command line\n");
goto CLEANUP2;
}
// InitializeProcessCommandLine took ownership of this memory.
command_line = NULL;
#ifdef PAL_PERF
// Initialize the Profiling structure
if(FALSE == PERFInitialize(command_line, exe_path))
{
ERROR("Performance profiling initial failed\n");
goto CLEANUP2;
}
PERFAllocThreadInfo();
#endif
if (!LOADSetExeName(exe_path))
{
ERROR("Unable to set exe name\n");
goto CLEANUP2;
}
// LOADSetExeName took ownership of this memory.
exe_path = NULL;
}
if (init_count == 0)
{
//
// Create the initial process and thread objects
//
palError = CreateInitialProcessAndThreadObjects(pThread);
if (NO_ERROR != palError)
{
ERROR("Unable to create initial process and thread objects\n");
goto CLEANUP2;
}
if (flags & PAL_INITIALIZE_SYNC_THREAD)
{
//
// Tell the synchronization manager to start its worker thread
//
palError = CPalSynchMgrController::StartWorker(pThread);
if (NO_ERROR != palError)
{
ERROR("Synch manager failed to start worker thread\n");
goto CLEANUP5;
}
}
palError = ERROR_GEN_FAILURE;
/* initialize structured exception handling stuff (signals, etc) */
if (FALSE == SEHInitialize(pThread, flags))
{
ERROR("Unable to initialize SEH support\n");
goto CLEANUP5;
}
if (FALSE == TIMEInitialize())
{
ERROR("Unable to initialize TIME support\n");
goto CLEANUP6;
}
/* Initialize the File mapping critical section. */
if (FALSE == MAPInitialize())
{
ERROR("Unable to initialize file mapping support\n");
goto CLEANUP6;
}
/* Initialize the Virtual* functions. */
bool initializeExecutableMemoryAllocator = (flags & PAL_INITIALIZE_EXEC_ALLOCATOR) != 0;
if (FALSE == VIRTUALInitialize(initializeExecutableMemoryAllocator))
{
ERROR("Unable to initialize virtual memory support\n");
goto CLEANUP10;
}
if (flags & PAL_INITIALIZE_STD_HANDLES)
{
/* create file objects for standard handles */
if (!FILEInitStdHandles())
{
ERROR("Unable to initialize standard file handles\n");
goto CLEANUP13;
}
}
if (FALSE == CRTInitStdStreams())
{
ERROR("Unable to initialize CRT standard streams\n");
goto CLEANUP15;
}
TRACE("First-time PAL initialization complete.\n");
init_count++;
/* Set LastError to a non-good value - functions within the
PAL startup may set lasterror to a nonzero value. */
SetLastError(NO_ERROR);
retval = 0;
}
else
{
init_count++;
// Behave the same wrt entering the PAL independent of whether this
// is the first call to PAL_Initialize or not. The first call implied
// PAL_Enter by virtue of creating the CPalThread for the current
// thread, and its starting state is to be in the PAL.
(void)PAL_Enter(PAL_BoundaryTop);
TRACE("Initialization count increases to %d\n", init_count.Load());
SetLastError(NO_ERROR);
retval = 0;
}
goto done;
/* No cleanup required for CRTInitStdStreams */
CLEANUP15:
FILECleanupStdHandles();
CLEANUP13:
VIRTUALCleanup();
CLEANUP10:
MAPCleanup();
CLEANUP6:
SEHCleanup();
CLEANUP5:
PROCCleanupInitialProcess();
CLEANUP2:
InternalFree(exe_path);
CLEANUP1e:
InternalFree(command_line);
CLEANUP1d:
// Cleanup synchronization manager
CLEANUP1c:
// Cleanup object manager
CLEANUP1b:
// Cleanup initial thread data
CLEANUP1a:
// Cleanup global process data
CLEANUP1:
SHMCleanup();
CLEANUP0:
TLSCleanup();
ERROR("PAL_Initialize failed\n");
SetLastError(palError);
done:
#ifdef PAL_PERF
if( retval == 0)
{
PERFEnableProcessProfile();
PERFEnableThreadProfile(FALSE);
PERFCalibrate("Overhead of PERF entry/exit");
}
#endif
InternalLeaveCriticalSection(pThread, init_critsec);
if (fFirstTimeInit && 0 == retval)
{
_ASSERTE(NULL != pThread);
}
if (retval != 0 && GetLastError() == ERROR_SUCCESS)
{
ASSERT("returning failure, but last error not set\n");
}
#ifdef __APPLE__
exit :
#endif // __APPLE__
LOGEXIT("PAL_Initialize returns int %d\n", retval);
return retval;
}
/*++
Function:
PAL_InitializeCoreCLR
Abstract:
A replacement for PAL_Initialize when loading CoreCLR. Instead of taking a command line (which CoreCLR
instances aren't given anyway) the path into which the CoreCLR is installed is supplied instead. This is
cached so that PAL_GetPALDirectoryW can return it later.
This routine also makes sure the psuedo dynamic libraries PALRT and mscorwks have their initialization
methods called.
Return:
ERROR_SUCCESS if successful
An error code, if it failed
--*/
PAL_ERROR
PALAPI
PAL_InitializeCoreCLR(const char *szExePath)
{
// Fake up a command line to call PAL initialization with.
int result = Initialize(1, &szExePath, PAL_INITIALIZE_CORECLR);
if (result != 0)
{
return GetLastError();
}
// Check for a repeated call (this is a no-op).
if (InterlockedIncrement(&g_coreclrInitialized) > 1)
{
PAL_Enter(PAL_BoundaryTop);
return ERROR_SUCCESS;
}
// Now that the PAL is initialized it's safe to call the initialization methods for the code that used to
// be dynamically loaded libraries but is now statically linked into CoreCLR just like the PAL, i.e. the
// PAL RT and mscorwks.
if (!LOADInitializeCoreCLRModule())
{
return ERROR_DLL_INIT_FAILED;
}
if (!InitializeFlushProcessWriteBuffers())
{
return ERROR_GEN_FAILURE;
}
return ERROR_SUCCESS;
}
/*++
Function:
PAL_IsDebuggerPresent
Abstract:
This function should be used to determine if a debugger is attached to the process.
--*/
PALIMPORT
BOOL
PALAPI
PAL_IsDebuggerPresent()
{
#if defined(__linux__)
BOOL debugger_present = FALSE;
char buf[2048];
int status_fd = open("/proc/self/status", O_RDONLY);
if (status_fd == -1)
{
return FALSE;
}
ssize_t num_read = read(status_fd, buf, sizeof(buf) - 1);
if (num_read > 0)
{
static const char TracerPid[] = "TracerPid:";
char *tracer_pid;
buf[num_read] = '\0';
tracer_pid = strstr(buf, TracerPid);
if (tracer_pid)
{
debugger_present = !!atoi(tracer_pid + sizeof(TracerPid) - 1);
}
}
return debugger_present;
#elif defined(__APPLE__)
struct kinfo_proc info = {};
size_t size = sizeof(info);
int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PID, getpid() };
int ret = sysctl(mib, sizeof(mib)/sizeof(*mib), &info, &size, NULL, 0);
if (ret == 0)
return ((info.kp_proc.p_flag & P_TRACED) != 0);
return FALSE;
#else
return FALSE;
#endif
}
/*++
Function:
PAL_EntryPoint
Abstract:
This function should be used to wrap code that uses PAL library on thread that was not created by PAL.
--*/
PALIMPORT
DWORD_PTR
PALAPI
PAL_EntryPoint(
IN LPTHREAD_START_ROUTINE lpStartAddress,
IN LPVOID lpParameter)
{
CPalThread *pThread;
DWORD_PTR retval = (DWORD) -1;
ENTRY("PAL_EntryPoint(lpStartAddress=%p, lpParameter=%p)\n", lpStartAddress, lpParameter);
pThread = InternalGetCurrentThread();
if (NULL == pThread)
{
/* This function works only for thread that called PAL_Initialize for now. */
ERROR( "Unable to get the thread object.\n" );
goto done;
}
retval = (*lpStartAddress)(lpParameter);
done:
LOGEXIT("PAL_EntryPoint returns int %d\n", retval);
return retval;
}
/*++
Function:
PAL_Shutdown
Abstract:
This function shuts down the PAL WITHOUT exiting the current process.
--*/
void
PALAPI
PAL_Shutdown(
void)
{
TerminateCurrentProcessNoExit(FALSE /* bTerminateUnconditionally */);
}
/*++
Function:
PAL_Terminate
Abstract:
This function is the called when a thread has finished using the PAL
library. It shuts down PAL and exits the current process.
--*/
void
PALAPI
PAL_Terminate(
void)
{
PAL_TerminateEx(0);
}
/*++
Function:
PAL_TerminateEx
Abstract:
This function is the called when a thread has finished using the PAL
library. It shuts down PAL and exits the current process with
the specified exit code.
--*/
void
PALAPI
PAL_TerminateEx(
int exitCode)
{
ENTRY_EXTERNAL("PAL_TerminateEx()\n");
if (NULL == init_critsec)
{
/* note that these macros probably won't output anything, since the
debug channels haven't been initialized yet */
ASSERT("PAL_Initialize has never been called!\n");
LOGEXIT("PAL_Terminate returns.\n");
}
// Declare the beginning of shutdown
PALSetShutdownIntent();
LOGEXIT("PAL_TerminateEx is exiting the current process.\n");
exit(exitCode);
}
/*++
Function:
PAL_InitializeDebug
Abstract:
This function is the called when cordbg attaches to the process.
--*/
void
PALAPI
PAL_InitializeDebug(
void)
{
PERF_ENTRY(PAL_InitializeDebug);
ENTRY("PAL_InitializeDebug()\n");
#if HAVE_MACH_EXCEPTIONS
MachExceptionInitializeDebug();
#endif
LOGEXIT("PAL_InitializeDebug returns\n");
PERF_EXIT(PAL_InitializeDebug);
}
/*++
Function:
PALIsThreadDataInitialized
Returns TRUE if startup has reached a point where thread data is available
--*/
BOOL PALIsThreadDataInitialized()
{
return g_fThreadDataAvailable;
}
/*++
Function:
PALCommonCleanup
Utility function to prepare for shutdown.
--*/
void
PALCommonCleanup()
{
static bool cleanupDone = false;
// Declare the beginning of shutdown
PALSetShutdownIntent();
if (!cleanupDone)
{
cleanupDone = true;
//
// Let the synchronization manager know we're about to shutdown
//
CPalSynchMgrController::PrepareForShutdown();
#ifdef _DEBUG
PROCDumpThreadList();
#endif
}
// Mark that the PAL is uninitialized
init_count = 0;
}
BOOL PALIsShuttingDown()
{
/* ROTORTODO: This function may be used to provide a reader/writer-like
mechanism (or a ref counting one) to prevent PAL APIs that need to access
PAL runtime data, from working when PAL is shutting down. Each of those API
should acquire a read access while executing. The shutting down code would
acquire a write lock, i.e. suspending any new incoming reader, and waiting
for the current readers to be done. That would allow us to get rid of the
dangerous suspend-all-other-threads at shutdown time */
return shutdown_intent;
}
void PALSetShutdownIntent()
{
/* ROTORTODO: See comment in PALIsShuttingDown */
shutdown_intent = TRUE;
}
/*++
Function:
PALInitLock
Take the initializaiton critical section (init_critsec). necessary to serialize
TerminateProcess along with PAL_Terminate and PAL_Initialize
(no parameters)
Return value :
TRUE if critical section existed (and was acquired)
FALSE if critical section doens't exist yet
--*/
BOOL PALInitLock(void)
{
if(!init_critsec)
{
return FALSE;
}
CPalThread * pThread =
(PALIsThreadDataInitialized() ? InternalGetCurrentThread() : NULL);
InternalEnterCriticalSection(pThread, init_critsec);
return TRUE;
}
/*++
Function:
PALInitUnlock
Release the initialization critical section (init_critsec).
(no parameters, no return value)
--*/
void PALInitUnlock(void)
{
if(!init_critsec)
{
return;
}
CPalThread * pThread =
(PALIsThreadDataInitialized() ? InternalGetCurrentThread() : NULL);
InternalLeaveCriticalSection(pThread, init_critsec);
}
/* Internal functions *********************************************************/
/*++
Function:
INIT_IncreaseDescriptorLimit [internal]
Abstract:
Calls setrlimit(2) to increase the maximum number of file descriptors
this process can open.
Return value:
TRUE if the call to setrlimit succeeded; FALSE otherwise.
--*/
static BOOL INIT_IncreaseDescriptorLimit(void)
{
struct rlimit rlp;
int result;
result = getrlimit(RLIMIT_NOFILE, &rlp);
if (result != 0)
{
return FALSE;
}
// Set our soft limit for file descriptors to be the same
// as the max limit.
rlp.rlim_cur = rlp.rlim_max;
result = setrlimit(RLIMIT_NOFILE, &rlp);
if (result != 0)
{
return FALSE;
}
return TRUE;
}
/*++
Function:
INIT_FormatCommandLine [Internal]
Abstract:
This function converts an array of arguments (argv) into a Unicode
command-line for use by GetCommandLineW
Parameters :
int argc : number of arguments in argv
char **argv : argument list in an array of NULL-terminated strings
Return value :
pointer to Unicode command line. This is a buffer allocated with malloc;
caller is responsible for freeing it with free()
Note : not all peculiarities of Windows command-line processing are supported;
-what is supported :
-arguments with white-space must be double quoted (we'll just double-quote
all arguments to simplify things)
-some characters must be escaped with \ : particularly, the double-quote,
to avoid confusion with the double-quotes at the start and end of
arguments, and \ itself, to avoid confusion with escape sequences.
-what is not supported:
-under Windows, \\ is interpreted as an escaped \ ONLY if it's followed by
an escaped double-quote \". \\\" is passed to argv as \", but \\a is
passed to argv as \\a... there may be other similar cases
-there may be other characters which must be escaped
--*/
static LPWSTR INIT_FormatCommandLine (int argc, const char * const *argv)
{
LPWSTR retval;
LPSTR command_line=NULL, command_ptr;
LPCSTR arg_ptr;
INT length, i,j;
BOOL bQuoted = FALSE;
/* list of characters that need no be escaped with \ when building the
command line. currently " and \ */
LPCSTR ESCAPE_CHARS="\"\\";
/* allocate temporary memory for the string. Play it safe :
double the length of each argument (in case they're composed
exclusively of escaped characters), and add 3 (for the double-quotes
and separating space). This is temporary anyway, we return a LPWSTR */
length=0;
for(i=0; i<argc; i++)
{
TRACE("argument %d is %s\n", i, argv[i]);
length+=3;
length+=strlen(argv[i])*2;
}
command_line = reinterpret_cast<LPSTR>(InternalMalloc(length));
if(!command_line)
{
ERROR("couldn't allocate memory for command line!\n");
return NULL;
}
command_ptr=command_line;
for(i=0; i<argc; i++)
{
/* double-quote at beginning of argument containing at least one space */
for(j = 0; (argv[i][j] != 0) && (!isspace((unsigned char) argv[i][j])); j++);
if (argv[i][j] != 0)
{
*command_ptr++='"';
bQuoted = TRUE;
}
/* process the argument one character at a time */
for(arg_ptr=argv[i]; *arg_ptr; arg_ptr++)
{
/* if character needs to be escaped, prepend a \ to it. */
if( strchr(ESCAPE_CHARS,*arg_ptr))
{
*command_ptr++='\\';
}
/* now we can copy the actual character over. */
*command_ptr++=*arg_ptr;
}
/* double-quote at end of argument; space to separate arguments */
if (bQuoted == TRUE)
{
*command_ptr++='"';
bQuoted = FALSE;
}
*command_ptr++=' ';
}
/* replace the last space with a NULL terminator */
command_ptr--;
*command_ptr='\0';
/* convert to Unicode */
i = MultiByteToWideChar(CP_ACP, 0,command_line, -1, NULL, 0);
if (i == 0)
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(command_line);
return NULL;
}
retval = reinterpret_cast<LPWSTR>(InternalMalloc((sizeof(WCHAR)*i)));
if(retval == NULL)
{
ERROR("can't allocate memory for Unicode command line!\n");
InternalFree(command_line);
return NULL;
}
if(!MultiByteToWideChar(CP_ACP, 0,command_line, i, retval, i))
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(retval);
retval = NULL;
}
else
TRACE("Command line is %s\n", command_line);
InternalFree(command_line);
return retval;
}
/*++
Function:
INIT_FindEXEPath
Abstract:
Determine the full, canonical path of the current executable by searching
$PATH.
Parameters:
LPCSTR exe_name : file to search for
Return:
pointer to buffer containing the full path. This buffer must be released
by the caller using free()
Notes :
this function assumes that "exe_name" is in Unix style (no \)
Notes 2:
This doesn't handle the case of directories with the desired name
(and directories are usually executable...)
--*/
static LPWSTR INIT_FindEXEPath(LPCSTR exe_name)
{
#ifndef __APPLE__
CHAR real_path[PATH_MAX+1];
LPSTR env_path;
LPSTR path_ptr;
LPSTR cur_dir;
INT exe_name_length;
BOOL need_slash;
LPWSTR return_value;
INT return_size;
struct stat theStats;
/* if a path is specified, only search there */
if (strchr(exe_name, '/'))
{
if ( -1 == stat( exe_name, &theStats ) )
{
ERROR( "The file does not exist\n" );
return NULL;
}
if ( UTIL_IsExecuteBitsSet( &theStats ) )
{
if(!realpath(exe_name, real_path))
{
ERROR("realpath() failed!\n");
return NULL;
}
return_size=MultiByteToWideChar(CP_ACP,0,real_path,-1,NULL,0);
if ( 0 == return_size )
{
ASSERT("MultiByteToWideChar failure\n");
return NULL;
}
return_value = reinterpret_cast<LPWSTR>(InternalMalloc((return_size*sizeof(WCHAR))));
if ( NULL == return_value )
{
ERROR("Not enough memory to create full path\n");
return NULL;
}
else
{
if (!MultiByteToWideChar(CP_ACP, 0, real_path, -1,
return_value, return_size))
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(return_value);
return_value = NULL;
}
else
{
TRACE("full path to executable is %s\n", real_path);
}
}
return return_value;
}
}
/* no path was specified : search $PATH */
env_path = EnvironGetenv("PATH");
if (!env_path || *env_path=='\0')
{
WARN("$PATH isn't set.\n");
if (env_path != NULL)
{
InternalFree(env_path);
}
goto last_resort;
}
exe_name_length=strlen(exe_name);
cur_dir=env_path;
while (cur_dir)
{
LPSTR full_path;
struct stat theStats;
/* skip all leading ':' */
while (*cur_dir==':')
{
cur_dir++;
}
if (*cur_dir=='\0')
{
break;
}
/* cut string at next ':' */
path_ptr = strchr(cur_dir, ':');
if (path_ptr)
{
/* check if we need to add a '/' between the path and filename */
need_slash=(*(path_ptr-1))!='/';
/* NULL_terminate path element */
*path_ptr++='\0';
}
else
{
/* check if we need to add a '/' between the path and filename */
need_slash=(cur_dir[strlen(cur_dir)-1])!='/';
}
TRACE("looking for %s in %s\n", exe_name, cur_dir);
/* build tentative full file name */
int iLength = (strlen(cur_dir)+exe_name_length+2);
full_path = reinterpret_cast<LPSTR>(InternalMalloc(iLength));
if (!full_path)
{
ERROR("Not enough memory!\n");
break;
}
if (strcpy_s(full_path, iLength, cur_dir) != SAFECRT_SUCCESS)
{
ERROR("strcpy_s failed!\n");
InternalFree(full_path);
InternalFree(env_path);
return NULL;
}
if (need_slash)
{
if (strcat_s(full_path, iLength, "/") != SAFECRT_SUCCESS)
{
ERROR("strcat_s failed!\n");
InternalFree(full_path);
InternalFree(env_path);
return NULL;
}
}
if (strcat_s(full_path, iLength, exe_name) != SAFECRT_SUCCESS)
{
ERROR("strcat_s failed!\n");
InternalFree(full_path);
InternalFree(env_path);
return NULL;
}
/* see if file exists AND is executable */
if ( -1 != stat( full_path, &theStats ) )
{
if( UTIL_IsExecuteBitsSet( &theStats ) )
{
/* generate canonical path */
if (!realpath(full_path, real_path))
{
ERROR("realpath() failed!\n");
InternalFree(full_path);
InternalFree(env_path);
return NULL;
}
InternalFree(full_path);
return_size = MultiByteToWideChar(CP_ACP,0,real_path,-1,NULL,0);
if ( 0 == return_size )
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(env_path);
return NULL;
}
return_value = reinterpret_cast<LPWSTR>(InternalMalloc((return_size*sizeof(WCHAR))));
if ( NULL == return_value )
{
ERROR("Not enough memory to create full path\n");
InternalFree(env_path);
return NULL;
}
if (!MultiByteToWideChar(CP_ACP, 0, real_path, -1, return_value,
return_size))
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(return_value);
return_value = NULL;
}
else
{
TRACE("found %s in %s; real path is %s\n", exe_name,
cur_dir,real_path);
}
InternalFree(env_path);
return return_value;
}
}
/* file doesn't exist : keep searching */
InternalFree(full_path);
/* path_ptr is NULL if there's no ':' after this directory */
cur_dir=path_ptr;
}
InternalFree(env_path);
TRACE("No %s found in $PATH (%s)\n", exe_name, EnvironGetenv("PATH", FALSE));
last_resort:
/* last resort : see if the executable is in the current directory. This is
possible if it comes from a exec*() call. */
if (0 == stat(exe_name,&theStats))
{
if ( UTIL_IsExecuteBitsSet( &theStats ) )
{
if (!realpath(exe_name, real_path))
{
ERROR("realpath() failed!\n");
return NULL;
}
return_size = MultiByteToWideChar(CP_ACP,0,real_path,-1,NULL,0);
if (0 == return_size)
{
ASSERT("MultiByteToWideChar failure\n");
return NULL;
}
return_value = reinterpret_cast<LPWSTR>(InternalMalloc((return_size*sizeof(WCHAR))));
if (NULL == return_value)
{
ERROR("Not enough memory to create full path\n");
return NULL;
}
else
{
if (!MultiByteToWideChar(CP_ACP, 0, real_path, -1,
return_value, return_size))
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(return_value);
return_value = NULL;
}
else
{
TRACE("full path to executable is %s\n", real_path);
}
}
return return_value;
}
else
{
ERROR("found %s in current directory, but it isn't executable!\n",
exe_name);
}
}
else
{
TRACE("last resort failed : executable %s is not in the current "
"directory\n",exe_name);
}
ERROR("executable %s not found anywhere!\n", exe_name);
return NULL;
#else // !__APPLE__
// On the Mac we can just directly ask the OS for the executable path.
CHAR exec_path[PATH_MAX+1];
LPWSTR return_value;
INT return_size;
uint32_t bufsize = sizeof(exec_path);
if (_NSGetExecutablePath(exec_path, &bufsize))
{
ASSERT("_NSGetExecutablePath failure\n");
return NULL;
}
return_size = MultiByteToWideChar(CP_ACP,0,exec_path,-1,NULL,0);
if (0 == return_size)
{
ASSERT("MultiByteToWideChar failure\n");
return NULL;
}
return_value = reinterpret_cast<LPWSTR>(InternalMalloc((return_size*sizeof(WCHAR))));
if (NULL == return_value)
{
ERROR("Not enough memory to create full path\n");
return NULL;
}
else
{
if (!MultiByteToWideChar(CP_ACP, 0, exec_path, -1,
return_value, return_size))
{
ASSERT("MultiByteToWideChar failure\n");
InternalFree(return_value);
return_value = NULL;
}
else
{
TRACE("full path to executable is %s\n", exec_path);
}
}
return return_value;
#endif // !__APPLE__
}
|