ConstUnicode
Unicode_GetStatic(const char *asciiBytes, // IN
Bool unescape) // IN
{
Unicode result = NULL;
HashTable *stringTable;
if (unescape) {
stringTable = HashTable_AllocOnce(&UnicodeUnescapedStringTable, 4096,
HASH_FLAG_ATOMIC | HASH_STRING_KEY,
UnicodeHashFree);
} else {
stringTable = HashTable_AllocOnce(&UnicodeStringTable, 4096,
HASH_FLAG_ATOMIC | HASH_STRING_KEY,
UnicodeHashFree);
}
/*
* Attempt a lookup for the key value; if it is found things are easy and
* fine. Otherwise HashTable_LookupOrInsert is used to attempt to enter
* the data in a racey manner. Should multiple threads attempt to enter
* the same key concurrently one thread will get the entered data and the
* other threads will detect that their entries were rejected; they
* discard their copies of the data and use the entered data (values
* will be stable).
*/
if (!HashTable_Lookup(stringTable, asciiBytes, (void **) &result)) {
Unicode newData = UnicodeAllocStatic(asciiBytes, unescape);
if (newData) {
result = HashTable_LookupOrInsert(stringTable, asciiBytes, newData);
if (result != newData) {
Unicode_Free(newData);
}
}
}
return result;
}
static HolderContext *
MXUserGetHolderContext(MXUserRWLock *lock) // IN:
{
HolderContext *result;
void *threadID = MXUserCastedThreadID();
ASSERT(lock->holderTable);
if (!HashTable_Lookup(lock->holderTable, threadID, (void **) &result)) {
HolderContext *newContext = Util_SafeMalloc(sizeof(HolderContext));
newContext->holdStart = 0;
newContext->state = RW_UNLOCKED;
result = HashTable_LookupOrInsert(lock->holderTable, threadID,
(void *) newContext);
if (result != newContext) {
free(newContext);
}
}
return result;
}
const char *
Err_Errno2String(Err_Number errorNumber) // IN
{
HashTable *numTable;
HashTable *ptrTable;
ErrInfo *info;
ErrInfo *oldInfo;
Err_Number oldErrno = Err_Errno();
ASSERT(errorNumber != ERR_INVALID);
/*
* Look up the error in numTable.
* Or insert it if it's not there.
*/
numTable = NUMTABLE();
if (!HashTable_Lookup(numTable, (void *) (uintptr_t) errorNumber,
(void **) &info)) {
char buf[2048];
const char *p;
size_t n;
/*
* Convert number to string and build the info structure.
*/
p = ErrErrno2String(errorNumber, buf, sizeof buf);
info = Util_SafeMalloc(sizeof *info);
info->number = errorNumber;
info->string = Util_SafeStrdup(p);
/*
* To be safe, make sure the end of the string is at
* a UTF-8 boundary, but we can only do this when the
* string is in our buffer (it may not be).
*/
n = strlen(info->string);
n = CodeSet_Utf8FindCodePointBoundary(info->string, n);
info->string[n] = '\0';
/*
* Try to insert new info into numTable.
* If that fails, then we must have lost out to someone else.
* Use theirs in that case.
*/
oldInfo = HashTable_LookupOrInsert(numTable,
(void *) (uintptr_t) errorNumber,
info);
if (oldInfo != info) {
ASSERT(oldInfo->number == info->number);
ASSERT(Str_Strcmp(oldInfo->string, info->string) == 0);
free(info->string);
free(info);
info = oldInfo;
}
}
/*
* Try to insert info into ptrTable.
* We need to do it even if we didn't create this entry,
* because we may get here before the other guy (who created
* the entry and inserted it into numTable).
*/
ptrTable = PTRTABLE();
oldInfo = HashTable_LookupOrInsert(ptrTable, info->string, info);
ASSERT(oldInfo == info);
#if defined VMX86_DEBUG && defined __linux__
{
HashTable *strTable = STRTABLE();
ErrInfo *i = HashTable_LookupOrInsert(strTable, info->string, info);
ASSERT(i == info);
}
#endif
Err_SetErrno(oldErrno);
return info->string;
}
static HashTable *
SNEBuildHash(const char **compatEnviron)
// IN: original "compatibility" environment
{
HashTable *environTable;
const char **p;
/*
* Number of buckets picked arbitrarily. We're more interested in having an
* associative array than raw table performance.
*/
environTable = HashTable_Alloc(64, HASH_STRING_KEY | HASH_FLAG_COPYKEY, free);
for (p = compatEnviron; p && *p; p++) {
const size_t prefixLength = sizeof "VMWARE_" - 1;
char *key;
char *value;
unsigned int index;
index = 0;
key = StrUtil_GetNextToken(&index, *p, "=");
if (!key) {
/* XXX Must empty environment variables still contain a '=' delimiter? */
Debug("%s: Encountered environment entry without '='.\n", __func__);
continue;
}
/*
* Copy the value beginning after the '=' delimiter (even if it's empty).
*/
++index;
value = Util_SafeStrdup(&(*p)[index]);
if (StrUtil_StartsWith(key, "VMWARE_") &&
key[prefixLength] != '\0' &&
(value[0] == '0' || value[0] == '1')) {
/*
* Okay, this appears to be one of the wrapper's variables, so let's
* figure out the original environment variable name (by just indexing
* past the prefix) and value (by indexing past the "was this variable
* in the native environment?" marker).
*
* XXX Should we move this marker to a separate header?
*/
char *realKey = &key[prefixLength];
char *realValue = (value[0] == '0')
? NULL
: Util_SafeStrdup(&value[1]);
HashTable_ReplaceOrInsert(environTable, realKey, realValue);
} else {
HashTable_LookupOrInsert(environTable, key, value);
}
/*
* The hash table makes a copy of our key, and it takes ownership of inserted
* values (via our passed freeing function). So that means we're responsible
* for freeing 'key', but -not- 'value'.
*/
free(key);
}
return environTable;
}
