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utils.c
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utils.c
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#include "pharovm/pharo.h"
#include <sys/stat.h>
#include "pharovm/pathUtilities.h"
#ifndef _WIN32
#include <libgen.h>
#include <sys/param.h>
#else
#include <windows.h>
/* Maximum length of file name */
#if !defined(PATH_MAX)
# define PATH_MAX MAX_PATH
#endif
#if !defined(FILENAME_MAX)
# define FILENAME_MAX MAX_PATH
#endif
#if !defined(NAME_MAX)
# define NAME_MAX FILENAME_MAX
#endif
#endif
#include <signal.h>
char vmName[PATH_MAX];
char imageName[PATH_MAX];
char vmFullPath[PATH_MAX];
char vmPath[PATH_MAX];
#if __APPLE__
void fillApplicationDirectory(char* vmPath);
#endif
#ifdef _WIN32
BOOL fIsConsole = 1;
#endif
int isVMRunOnWorkerThread(void);
void *os_exports[][3]=
{
{ 0, 0, 0 }
};
static const char* systemSearchPaths[] = {
#ifdef _WIN32
#endif
#if defined(__linux__) || defined(unix) || defined(__APPLE__)
"./",
"/usr/local/lib/",
"/usr/lib/",
"/lib/",
# if defined(__linux__)
# if defined(__i386__)
"/usr/local/lib/i386-linux-gnu/",
"/usr/lib/i386-linux-gnu/",
"/lib/i386-linux-gnu/",
# elif defined(__x86_64__)
"/usr/local/lib/x86_64-linux-gnu/",
"/usr/lib/x86_64-linux-gnu/",
"/lib/x86_64-linux-gnu/",
# endif
# endif
#endif
NULL
};
char** pluginPaths = NULL;
char* emptyPaths[] = {NULL};
EXPORT(const char*) getSourceVersion(){
return VM_BUILD_SOURCE_STRING;
}
EXPORT(const char*) getVMVersion(){
return VM_BUILD_STRING;
}
const char * GetAttributeString(sqInt id)
{
if (id < 0) /* VM argument */
{
if (-id < getVMArgumentCount()){
return getVMArgument(-id);
}
success(false);
return "";
}
switch (id)
{
case 0:
return vmFullPath;
case 1:
return getImageName();
case 1001:
/* OS type: "unix", "win32", "mac", ... */
return OS_TYPE;
case 1002:
/* OS name: e.g. "solaris2.5" on unix, "win95" on win32, ... */
return VM_TARGET_OS;
case 1003:
/* processor architecture: e.g. "68k", "x86", "PowerPC", ... */
return VM_TARGET_CPU;
case 1004:
/* Interpreter version string */
return interpreterVersion;
case 1006:
/* vm build string */
return getVMVersion();
#if STACKVM
case 1007: { /* interpreter build info */
extern char *__interpBuildInfo;
return __interpBuildInfo;
}
# if COGVM
case 1008: { /* cogit build info */
extern char *__cogitBuildInfo;
return __cogitBuildInfo;
}
# endif
#endif
case 1009: /* source tree version info */
return getSourceVersion();
case 1010: /* Implements AIO Interrupt */
return "AIO";
case 1011:
return isVMRunOnWorkerThread() ? "WORKER_THREAD" : "MAIN_THREAD";
default:
if ((id - 2) < getImageArgumentCount())
return getImageArgument(id - 2);
}
success(false);
return "";
}
sqInt attributeSize(sqInt id)
{
return strlen(GetAttributeString(id));
}
sqInt getAttributeIntoLength(sqInt id, sqInt byteArrayIndex, sqInt length)
{
if (length > 0) {
#ifdef _WIN32
/*
* Unsafe version of deprecated strncpy for compatibility
* - does not check error code
* - does use count as the size of the destination buffer
*/
strncpy_s(pointerForOop(byteArrayIndex), length + 1, GetAttributeString(id), length);
#else
strncpy(pointerForOop(byteArrayIndex), GetAttributeString(id), length);
#endif
}
return 0;
}
/**
* Returns the VM Name
*/
EXPORT(char*) getVMName(){
return vmName;
}
/**
* Sets the VMName.
* It copies the parameter to internal storage.
*/
void setVMName(const char* name){
#ifdef _WIN32
/*
* Unsafe version of deprecated strcpy for compatibility
* - does not check error code
* - does use count as the size of the destination buffer
*/
strcpy_s(vmName, strlen(name), name);
#else
strcpy(vmName, name);
#endif
}
char* getImageName(){
return imageName;
}
/**
* Sets the ImageName.
* It copies the parameter to internal storage.
*/
void setImageName(const char* name){
#ifdef _WIN32
/*
* Unsafe version of deprecated strcpy for compatibility
* - does not check error code
* - does use count as the size of the destination buffer
*/
strcpy_s(imageName, PATH_MAX, name);
#else
strcpy(imageName, name);
#endif
}
/**
* Sets the Full VM Path.
* It copies the parameter to internal storage.
*/
EXPORT(void) setVMPath(const char* name){
#ifdef _WIN32
/*
* Unsafe version of deprecated strcpy for compatibility
* - does not check error code
* - does use count as the size of the destination buffer
*/
strcpy_s(vmFullPath, PATH_MAX, name);
#else
strcpy(vmFullPath, name);
#endif
#if __APPLE__
fillApplicationDirectory(vmPath);
#else
int bufferSize = strlen(name) + 1;
char* tmpBasedir = (char*)alloca(bufferSize);
getBasePath(name, tmpBasedir, bufferSize);
# ifdef _WIN32
/*
* Unsafe version of deprecated strcpy for compatibility
* - does not check error code
* - does use count as the size of the destination buffer
*/
strcpy_s(vmPath, bufferSize, tmpBasedir);
# else
strcpy(vmPath, tmpBasedir);
# endif
#endif
}
sqInt vmPathSize(void){
return strlen(vmPath);
}
sqInt vmPathGetLength(sqInt sqVMPathIndex, sqInt length){
char *stVMPath= pointerForOop(sqVMPathIndex);
int count;
count = strlen(vmPath);
count = (length < count) ? length : count;
/* copy the file name into the Squeak string */
memcpy(stVMPath, vmPath, count);
return count;
}
sqInt imageNameGetLength(sqInt sqImageNameIndex, sqInt length){
char *sqImageName = pointerForOop(sqImageNameIndex);
int count;
count= strlen(imageName);
count= (length < count) ? length : count;
/* copy the file name into the Squeak string */
memcpy(sqImageName, imageName, count);
return count;
}
sqInt imageNamePutLength(sqInt sqImageNameIndex, sqInt length){
char *sqImageName= pointerForOop(sqImageNameIndex);
int count;
count = (length >= sizeof(imageName)) ? sizeof(imageName) - 1 : length;
/* copy the file name into a null-terminated C string */
memcpy(imageName, sqImageName, count);
imageName[count] = 0;
return count;
}
sqInt
imageNameSize(void)
{
return strlen(imageName);
}
int vmParamsCount = 0;
int imageParamsCount = 0;
char** vmParams = NULL;
char** imageParams = NULL;
int getVMArgumentCount(){
return vmParamsCount;
}
char* getVMArgument(int index){
if(vmParamsCount <= index)
return NULL;
return vmParams[index];
}
int getImageArgumentCount(){
return imageParamsCount;
}
char* getImageArgument(int index){
if(imageParamsCount <= index)
return NULL;
return imageParams[index];
}
static void
copyParams(int newCount, const char** newParams, int* oldCount, char*** old){
int i;
//Releasing the old params
if(*oldCount > 0){
for(i=0; i < *oldCount; i++){
free((*old)[i]);
}
free(*old);
*oldCount = 0;
}
if(newCount==0) return;
*oldCount = newCount;
*old = (char**)malloc(sizeof(char*) * newCount);
for(i=0; i < newCount; i++){
int oldSize = strlen(newParams[i]) + 1;
(*old)[i] = (char*)malloc(oldSize);
#ifdef _WIN32
/*
* Unsafe version of deprecated strcpy for compatibility
* - does not check error code
*/
strcpy_s((*old)[i], oldSize, newParams[i]);
#else
strcpy((*old)[i], newParams[i]);
#endif
}
}
void
setPharoCommandLineParameters(const char** newVMParams, int newVMParamsCount, const char** newImageParams, int newImageParamsCount)
{
copyParams(newVMParamsCount, newVMParams, &vmParamsCount, &vmParams);
copyParams(newImageParamsCount, newImageParams, &imageParamsCount, &imageParams);
}
char**
getSystemSearchPaths(){
return (char**)systemSearchPaths;
}
char**
getPluginPaths(){
if(pluginPaths == NULL) {
return (char**) emptyPaths;
}
return (char**) pluginPaths;
}
sqInt
ioExitWithErrorCode(int errorCode)
{
exit(errorCode);
}
/* New filename converting function; used by the interpreterProxy function
ioFilenamefromStringofLengthresolveAliases. Most platforms can ignore the
resolveAlias boolean - it seems to only be of use by OSX but is crucial there.
*/
sqInt
sqGetFilenameFromString(char * aCharBuffer, char * aFilenameString, sqInt filenameLength, sqInt resolveAlias)
{
memcpy(aCharBuffer, aFilenameString, filenameLength);
aCharBuffer[filenameLength]= 0;
#ifndef _WIN32
struct stat st;
int numLinks = 0;
if (resolveAlias)
{
for (;;) /* aCharBuffer might refer to link or alias */
{
if (!lstat(aCharBuffer, &st) && S_ISLNK(st.st_mode)) /* symlink */
{
char linkbuf[PATH_MAX+1];
if (++numLinks > MAXSYMLINKS)
return -1; /* too many levels of indirection */
filenameLength= readlink(aCharBuffer, linkbuf, PATH_MAX);
if ((filenameLength < 0) || (filenameLength >= PATH_MAX))
return -1; /* link unavailable or path too long */
linkbuf[filenameLength]= 0;
if (filenameLength > 0 && *linkbuf == '/') /* absolute */
strcpy(aCharBuffer, linkbuf);
else {
char *lastSeparator = strrchr(aCharBuffer,'/');
char *append = lastSeparator ? lastSeparator + 1 : aCharBuffer;
if (append - aCharBuffer + strlen(linkbuf) > PATH_MAX)
return -1; /* path too long */
strcpy(append,linkbuf);
}
continue;
}
#if defined(DARWIN)
if (isMacAlias(aCharBuffer))
{
if ((++numLinks > MAXSYMLINKS) || !resolveMacAlias(aCharBuffer, aCharBuffer, PATH_MAX))
return -1; /* too many levels or bad alias */
continue;
}
#endif
break; /* target is no longer a symlink or alias */
}
}
#endif
return 0;
}
#ifdef DARWIN
#include macAlias.c
#endif
#ifndef bzero
//We have to provide a bzero implementation for windows as the Cog code depends on it.
void bzero(void *s, size_t n){
memset(s, 0, n);
}
#endif
#ifdef COGVM
/*
* Cog has already captured CStackPointer before calling this routine. Record
* the original value, capture the pointers again and determine if CFramePointer
* lies between the two stack pointers and hence is likely in use. This is
* necessary since optimizing C compilers for x86 may use %ebp as a general-
* purpose register, in which case it must not be captured.
*/
int
isCFramePointerInUse()
{
extern unsigned long CStackPointer, CFramePointer;
extern void (*ceCaptureCStackPointers)(void);
unsigned long currentCSP = CStackPointer;
currentCSP = CStackPointer;
ceCaptureCStackPointers();
assert(CStackPointer < currentCSP);
return CFramePointer >= CStackPointer && CFramePointer <= currentCSP;
}
#endif // COGVM
/* Answer an approximation of the size of the redzone (if any). Do so by
* sending a signal to the process and computing the difference between the
* stack pointer in the signal handler and that in the caller. Assumes stacks
* descend.
*/
static char * volatile redZoneTestEndPointer = 0;
#ifdef SIGPROF
static void redZoneTestSigHandler(int sig, siginfo_t *info, void *uap)
{
redZoneTestEndPointer = (char *)&sig;
}
#else
static void redZoneTestSigHandler(int sig)
{
redZoneTestEndPointer = (char *)&sig;
}
#endif
#ifndef _WIN32
static long int min(long int x, long int y) { return (x < y) ? x : y; }
#endif
static int getRedZoneSize()
{
#if defined(SIGPROF) /* cygwin */
struct sigaction handler_action, old;
handler_action.sa_sigaction = redZoneTestSigHandler;
handler_action.sa_flags = SA_NODEFER | SA_SIGINFO;
sigemptyset(&handler_action.sa_mask);
(void)sigaction(SIGPROF, &handler_action, &old);
do kill(getpid(),SIGPROF); while (!redZoneTestEndPointer);
(void)sigaction(SIGPROF, &old, 0);
return (int)min((usqInt)&old,(usqInt)&handler_action) - sizeof(struct sigaction) - (usqInt)redZoneTestEndPointer;
#else /* cygwin */
void (*old)(int) = signal(SIGBREAK, redZoneTestSigHandler);
do raise(SIGBREAK); while (!redZoneTestEndPointer);
return (int) ((char *)&old - redZoneTestEndPointer);
#endif /* cygwin */
}
sqInt reportStackHeadroom;
static int stackPageHeadroom;
/* Answer the redzone size plus space for any signal handlers to run in.
* N.B. Space for signal handers may include space for the dynamic linker to
* run in since signal handlers may reference other functions, and linking may
* be lazy. The reportheadroom switch can be used to check empirically that
* there is sufficient headroom.
*/
int
osCogStackPageHeadroom()
{
if (!stackPageHeadroom)
stackPageHeadroom = getRedZoneSize() + 1024;
return stackPageHeadroom;
}
/****************************************************************************/
/* Helper to pop up a message box with a message formatted from the */
/* printf() format string and arguments */
/****************************************************************************/
#ifdef _WIN32
EXPORT(int) __cdecl sqMessageBox(DWORD dwFlags, const char *titleString, const char* fmt, ...)
{ TCHAR *buf;
va_list args;
DWORD result;
buf = (TCHAR*) calloc(sizeof(TCHAR), 4096);
va_start(args, fmt);
vsnprintf(buf, 4096-1, fmt, args);
va_end(args);
result = MessageBox(NULL,buf,titleString,dwFlags|MB_SETFOREGROUND);
free(buf);
return result;
}
EXPORT(void) printLastError(const TCHAR *prefix) {
LPVOID lpMsgBuf;
DWORD lastError;
lastError = GetLastError();
FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
NULL, GetLastError(), MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
(LPTSTR) &lpMsgBuf, 0, NULL );
wprintf(TEXT("%s (%ld) -- %s\n"), prefix, lastError, (unsigned short*)lpMsgBuf);
LocalFree( lpMsgBuf );
}
EXPORT(int) __cdecl abortMessage(TCHAR *fmt, ...)
{ TCHAR *buf;
va_list args;
va_start(args, fmt);
if (fIsConsole) {
vfwprintf(stderr, fmt, args);
exit(-1);
}
buf = (TCHAR*) calloc(sizeof(TCHAR), 4096);
wvsprintf(buf, fmt, args);
va_end(args);
MessageBox(NULL,buf,TEXT(VM_NAME) TEXT("!"),MB_OK | MB_TASKMODAL | MB_SETFOREGROUND);
free(buf);
exit(-1);
return 0;
}
#endif
EXPORT(char*) getFullPath(char const *relativePath, char* fullPath, int fullPathSize){
#ifdef _WIN32
int requiredSize = MultiByteToWideChar(CP_UTF8, 0, relativePath, -1, NULL, 0);
LPWSTR relativePathWide = (LPWSTR)alloca(sizeof(WCHAR) * (requiredSize + 1));
LPWSTR fullPathWide = (LPWSTR)alloca(sizeof(WCHAR)* fullPathSize);
MultiByteToWideChar(CP_UTF8, 0, relativePath, -1, relativePathWide, requiredSize);
if(GetFullPathNameW(relativePathWide, fullPathSize, fullPathWide, NULL) == 0){
return NULL;
}
WideCharToMultiByte(CP_UTF8, 0, fullPathWide, -1, fullPath, fullPathSize, NULL, 0);
return fullPath;
#else
//If the path is relative everything is fine.
if(relativePath[0] == '/' || relativePath[0] == '.'){
return realpath(relativePath, fullPath);
}
//If the path is not relative we have to add the './' in the beginning.
char* tmpPath = (char*)alloca(fullPathSize);
strcpy(tmpPath, "./");
strcat(tmpPath, relativePath);
return realpath(tmpPath, fullPath);
#endif
}
EXPORT(void) getBasePath(char const *path, char* basePath, int basePathSize){
#ifdef _WIN32
int requiredSize = MultiByteToWideChar(CP_UTF8, 0, path, -1, NULL, 0);
LPWSTR pathWide = (LPWSTR)alloca(sizeof(WCHAR) * (requiredSize + 1));
LPWSTR basePathWide = (LPWSTR)alloca(sizeof(WCHAR)* basePathSize);
LPWSTR finalBasePathWide = (LPWSTR)alloca(sizeof(WCHAR)* basePathSize);
LPWSTR driveWide = (LPWSTR)alloca(sizeof(WCHAR)* (2 + 1));
MultiByteToWideChar(CP_UTF8, 0, path, -1, pathWide, requiredSize);
int error = _wsplitpath_s(pathWide, driveWide, 3, basePathWide, basePathSize, NULL, 0, NULL,0);
if(error != 0){
logError("Could not extract basepath: %s", path);
strcpy_s(basePath, basePathSize, "");
return;
}
wcscpy_s(finalBasePathWide, basePathSize, driveWide);
wcscat_s(finalBasePathWide, basePathSize, basePathWide);
WideCharToMultiByte(CP_UTF8, 0, finalBasePathWide, -1, basePath, basePathSize, NULL, 0);
#else
char * pathCopy = strdup(path);
strcpy(basePath, dirname(pathCopy));
free(pathCopy);
#endif
}
int vmProcessArgumentCount = 0;
const char ** vmProcessArgumentVector = NULL;
const char ** vmProcessEnvironmentVector = NULL;
EXPORT(void) setProcessArguments(int count, const char** args){
vmProcessArgumentCount = count;
vmProcessArgumentVector = args;
}
EXPORT(void) setProcessEnvironmentVector(const char** environment){
vmProcessEnvironmentVector = environment;
}
EXPORT(int) getProcessArgumentCount(){
return vmProcessArgumentCount;
}
EXPORT(const char**) getProcessArgumentVector(){
return vmProcessArgumentVector;
}
EXPORT(const char **) getProcessEnvironmentVector(){
return vmProcessEnvironmentVector;
}
EXPORT(int) ioGetCurrentWorkingDirectorymaxLength(char * aCString, size_t maxLength){
return vm_path_get_current_working_dir_into(aCString, maxLength) == VM_SUCCESS ? 0 : -1 ;
}