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-rw-r--r--unix/tclUnixInit.c309
1 files changed, 24 insertions, 285 deletions
diff --git a/unix/tclUnixInit.c b/unix/tclUnixInit.c
index 5111746..8f872d5 100644
--- a/unix/tclUnixInit.c
+++ b/unix/tclUnixInit.c
@@ -16,7 +16,7 @@
# ifdef __APPLE__
# if defined(HAVE_WEAK_IMPORT) && MAC_OS_X_VERSION_MIN_REQUIRED < 1030
/* Support for weakly importing nl_langinfo on Darwin. */
-# define WEAK_IMPORT_NL_LANGINFO
+# define WEAK_IMPORT_NL_LANGINFO
extern char *nl_langinfo(nl_item) WEAK_IMPORT_ATTRIBUTE;
# endif
# endif
@@ -36,64 +36,6 @@
#endif
/*
- * Define TCL_NO_STACK_CHECK in the compiler options if you want to revert to
- * the old behavior of never checking the stack.
- */
-
-/*
- * Define this if you want to see a lot of output regarding stack checking.
- */
-
-#undef TCL_DEBUG_STACK_CHECK
-
-/*
- * Values used to compute how much space is really available for Tcl's use for
- * the stack.
- *
- * The getrlimit() function is documented to return the maximum stack size in
- * bytes. However, with threads enabled, the pthread library on some platforms
- * does bad things to the stack size limits. First, the limits cannot be
- * changed. Second, they appear to be sometimes reported incorrectly.
- *
- * The defines below may need to be adjusted if more platforms have this
- * broken behavior with threads enabled.
- */
-
-#ifndef TCL_MAGIC_STACK_DIVISOR
-#define TCL_MAGIC_STACK_DIVISOR 1
-#endif
-#ifndef TCL_RESERVED_STACK_PAGES
-#define TCL_RESERVED_STACK_PAGES 8
-#endif
-
-/*
- * Thread specific data for stack checking.
- */
-
-#ifndef TCL_NO_STACK_CHECK
-typedef struct ThreadSpecificData {
- int *outerVarPtr; /* The "outermost" stack frame pointer for
- * this thread. */
- int *stackBound; /* The current stack boundary */
-} ThreadSpecificData;
-static Tcl_ThreadDataKey dataKey;
-#ifdef TCL_CROSS_COMPILE
-static int stackGrowsDown = -1;
-static int StackGrowsDown(int *parent);
-#elif defined(TCL_STACK_GROWS_UP)
-#define stackGrowsDown 0
-#else
-#define stackGrowsDown 1
-#endif
-#endif /* TCL_NO_STACK_CHECK */
-
-#ifdef TCL_DEBUG_STACK_CHECK
-#define STACK_DEBUG(args) printf args
-#else
-#define STACK_DEBUG(args) (void)0
-#endif /* TCL_DEBUG_STACK_CHECK */
-
-/*
* Tcl tries to use standard and homebrew methods to guess the right encoding
* on the platform. However, there is always a final fallback, and this value
* is it. Make sure it is a real Tcl encoding.
@@ -126,8 +68,8 @@ static char pkgPath[sizeof(TCL_PACKAGE_PATH)+200] = TCL_PACKAGE_PATH;
*/
typedef struct LocaleTable {
- CONST char *lang;
- CONST char *encoding;
+ const char *lang;
+ const char *encoding;
} LocaleTable;
/*
@@ -140,7 +82,7 @@ typedef struct LocaleTable {
* among existing platforms.
*/
-static CONST LocaleTable localeTable[] = {
+static const LocaleTable localeTable[] = {
{"", "iso8859-1"},
{"ansi-1251", "cp1251"},
{"ansi_x3.4-1968", "iso8859-1"},
@@ -325,9 +267,6 @@ static CONST LocaleTable localeTable[] = {
{"zh_tw.big5", "big5"},
};
-#ifndef TCL_NO_STACK_CHECK
-static int GetStackSize(size_t *stackSizePtr);
-#endif /* TCL_NO_STACK_CHECK */
#ifdef HAVE_COREFOUNDATION
static int MacOSXGetLibraryPath(Tcl_Interp *interp,
int maxPathLen, char *tclLibPath);
@@ -479,7 +418,7 @@ TclpInitLibraryPath(
{
#define LIBRARY_SIZE 32
Tcl_Obj *pathPtr, *objPtr;
- CONST char *str;
+ const char *str;
Tcl_DString buffer;
pathPtr = Tcl_NewObj();
@@ -498,7 +437,7 @@ TclpInitLibraryPath(
if ((str != NULL) && (str[0] != '\0')) {
Tcl_DString ds;
int pathc;
- CONST char **pathv;
+ const char **pathv;
char installLib[LIBRARY_SIZE];
Tcl_DStringInit(&ds);
@@ -534,7 +473,7 @@ TclpInitLibraryPath(
Tcl_ListObjAppendElement(NULL, pathPtr, objPtr);
Tcl_DStringFree(&ds);
}
- ckfree((char *) pathv);
+ ckfree(pathv);
}
/*
@@ -567,7 +506,7 @@ TclpInitLibraryPath(
*encodingPtr = Tcl_GetEncoding(NULL, NULL);
str = Tcl_GetStringFromObj(pathPtr, lengthPtr);
- *valuePtr = ckalloc((unsigned int) (*lengthPtr)+1);
+ *valuePtr = ckalloc((*lengthPtr) + 1);
memcpy(*valuePtr, str, (size_t)(*lengthPtr)+1);
Tcl_DecrRefCount(pathPtr);
}
@@ -611,9 +550,9 @@ TclpSetInterfaces(void)
/* do nothing */
}
-static CONST char *
+static const char *
SearchKnownEncodings(
- CONST char *encoding)
+ const char *encoding)
{
int left = 0;
int right = sizeof(localeTable)/sizeof(LocaleTable);
@@ -634,12 +573,12 @@ SearchKnownEncodings(
return NULL;
}
-CONST char *
+const char *
Tcl_GetEncodingNameFromEnvironment(
Tcl_DString *bufPtr)
{
- CONST char *encoding;
- CONST char *knownEncoding;
+ const char *encoding;
+ const char *knownEncoding;
Tcl_DStringInit(bufPtr);
@@ -695,7 +634,7 @@ Tcl_GetEncodingNameFromEnvironment(
}
if (encoding != NULL) {
- CONST char *p;
+ const char *p;
Tcl_DString ds;
Tcl_DStringInit(&ds);
@@ -799,7 +738,7 @@ TclpSetVariables(
#endif /* MAC_OS_X_VERSION_MAX_ALLOWED > 1020 */
if (MacOSXGetLibraryPath(interp, MAXPATHLEN, tclLibPath) == TCL_OK) {
- CONST char *str;
+ const char *str;
CFBundleRef bundleRef;
Tcl_SetVar(interp, "tclDefaultLibrary", tclLibPath, TCL_GLOBAL_ONLY);
@@ -875,7 +814,7 @@ TclpSetVariables(
unameOK = 0;
#ifndef NO_UNAME
if (uname(&name) >= 0) {
- CONST char *native;
+ const char *native;
unameOK = 1;
@@ -948,6 +887,12 @@ TclpSetVariables(
Tcl_SetVar2(interp, "tcl_platform", "user", user, TCL_GLOBAL_ONLY);
Tcl_DStringFree(&ds);
}
+
+ /*
+ * Define what the platform PATH separator is. [TIP #315]
+ */
+
+ Tcl_SetVar2(interp, "tcl_platform","pathSeparator", ":", TCL_GLOBAL_ONLY);
}
/*
@@ -972,7 +917,7 @@ TclpSetVariables(
int
TclpFindVariable(
- CONST char *name, /* Name of desired environment variable
+ const char *name, /* Name of desired environment variable
* (native). */
int *lengthPtr) /* Used to return length of name (for
* successful searches) or number of non-NULL
@@ -980,7 +925,7 @@ TclpFindVariable(
* searches). */
{
int i, result = -1;
- register CONST char *env, *p1, *p2;
+ register const char *env, *p1, *p2;
Tcl_DString envString;
Tcl_DStringInit(&envString);
@@ -1007,212 +952,6 @@ TclpFindVariable(
return result;
}
-#ifndef TCL_NO_STACK_CHECK
-/*
- *----------------------------------------------------------------------
- *
- * TclpGetCStackParams --
- *
- * Determine the stack params for the current thread: in which
- * direction does the stack grow, and what is the stack lower (resp.
- * upper) bound for safe invocation of a new command? This is used to
- * cache the values needed for an efficient computation of
- * TclpCheckStackSpace() when the interp is known.
- *
- * Results:
- * Returns 1 if the stack grows down, in which case a stack lower bound
- * is stored at stackBoundPtr. If the stack grows up, 0 is returned and
- * an upper bound is stored at stackBoundPtr. If a bound cannot be
- * determined NULL is stored at stackBoundPtr.
- *
- *----------------------------------------------------------------------
- */
-
-int
-TclpGetCStackParams(
- int **stackBoundPtr)
-{
- int result = TCL_OK;
- size_t stackSize = 0; /* The size of the current stack. */
- ThreadSpecificData *tsdPtr = TCL_TSD_INIT(&dataKey);
- /* Most variables are actually in a
- * thread-specific data block to minimise the
- * impact on the stack. */
-#ifdef TCL_CROSS_COMPILE
- if (stackGrowsDown == -1) {
- /*
- * Not initialised!
- */
-
- stackGrowsDown = StackGrowsDown(&result);
- }
-#endif
-
- /*
- * The first time through in a thread: record the "outermost" stack
- * frame and inquire with the OS about the stack size.
- */
-
- if (tsdPtr->outerVarPtr == NULL) {
- tsdPtr->outerVarPtr = &result;
- result = GetStackSize(&stackSize);
- if (result != TCL_OK) {
- /* Can't check, assume it always succeeds */
-#ifdef TCL_CROSS_COMPILE
- stackGrowsDown = 1;
-#endif
- tsdPtr->stackBound = NULL;
- goto done;
- }
- }
-
- if (stackSize || (tsdPtr->stackBound &&
- ((stackGrowsDown && (&result < tsdPtr->stackBound)) ||
- (!stackGrowsDown && (&result > tsdPtr->stackBound))))) {
- /*
- * Either the thread's first pass or stack failure: set the params
- */
-
- if (!stackSize) {
- /*
- * Stack failure: if we didn't already blow up, we are within the
- * safety area. Recheck with the OS in case the stack was grown.
- */
- result = GetStackSize(&stackSize);
- if (result != TCL_OK) {
- /* Can't check, assume it always succeeds */
-#ifdef TCL_CROSS_COMPILE
- stackGrowsDown = 1;
-#endif
- tsdPtr->stackBound = NULL;
- goto done;
- }
- }
-
- if (stackGrowsDown) {
- tsdPtr->stackBound = (int *) ((char *)tsdPtr->outerVarPtr -
- stackSize);
- if (tsdPtr->stackBound > tsdPtr->outerVarPtr) {
- /* Overflow, that should never happen, just set it to NULL.
- * See [Bug #3166410] */
- tsdPtr->stackBound = NULL;
- }
- } else {
- tsdPtr->stackBound = (int *) ((char *)tsdPtr->outerVarPtr +
- stackSize);
- if (tsdPtr->stackBound < tsdPtr->outerVarPtr) {
- /* Overflow, that should never happen, just set it to NULL.
- * See [Bug #3166410] */
- tsdPtr->stackBound = NULL;
- }
- }
- }
-
- done:
- *stackBoundPtr = tsdPtr->stackBound;
- return stackGrowsDown;
-}
-
-#ifdef TCL_CROSS_COMPILE
-int
-StackGrowsDown(
- int *parent)
-{
- int here;
- return (&here < parent);
-}
-#endif
-
-/*
- *----------------------------------------------------------------------
- *
- * GetStackSize --
- *
- * Discover what the stack size for the current thread/process actually
- * is. Expects to only ever be called once per thread and then only at a
- * point when there is a reasonable amount of space left on the current
- * stack; TclpCheckStackSpace is called sufficiently frequently that that
- * is true.
- *
- * Results:
- * TCL_OK if the stack space was discovered, TCL_BREAK if the stack space
- * was undiscoverable in a way that stack checks should fail, and
- * TCL_CONTINUE if the stack space was undiscoverable in a way that stack
- * checks should succeed.
- *
- * Side effects:
- * None
- *
- *----------------------------------------------------------------------
- */
-
-static int
-GetStackSize(
- size_t *stackSizePtr)
-{
- size_t rawStackSize;
- struct rlimit rLimit; /* The result from getrlimit(). */
-
-#ifdef TCL_THREADS
- rawStackSize = TclpThreadGetStackSize();
- if (rawStackSize == (size_t) -1) {
- /*
- * Some kind of confirmed error in TclpThreadGetStackSize?! Fall back
- * to whatever getrlimit can determine.
- */
- STACK_DEBUG(("stack checks: TclpThreadGetStackSize failed in \n"));
- }
- if (rawStackSize > 0) {
- goto finalSanityCheck;
- }
-
- /*
- * If we have zero or an error, try the system limits instead. After all,
- * the pthread documentation states that threads should always be bound by
- * the system stack size limit in any case.
- */
-#endif /* TCL_THREADS */
-
- if (getrlimit(RLIMIT_STACK, &rLimit) != 0) {
- /*
- * getrlimit() failed, just fail the whole thing.
- */
- STACK_DEBUG(("skipping stack checks with failure: getrlimit failed\n"));
- return TCL_BREAK;
- }
- if (rLimit.rlim_cur == RLIM_INFINITY) {
- /*
- * Limit is "infinite"; there is no stack limit.
- */
- STACK_DEBUG(("skipping stack checks with success: infinite limit\n"));
- return TCL_CONTINUE;
- }
- rawStackSize = rLimit.rlim_cur;
-
- /*
- * Final sanity check on the determined stack size. If we fail this,
- * assume there are bogus values about and that we can't actually figure
- * out what the stack size really is.
- */
-
-#ifdef TCL_THREADS /* Stop warning... */
- finalSanityCheck:
-#endif
- if (rawStackSize <= 0) {
- STACK_DEBUG(("skipping stack checks with success\n"));
- return TCL_CONTINUE;
- }
-
- /*
- * Calculate a stack size with a safety margin.
- */
-
- *stackSizePtr = (rawStackSize / TCL_MAGIC_STACK_DIVISOR)
- - (getpagesize() * TCL_RESERVED_STACK_PAGES);
-
- return TCL_OK;
-}
-#endif /* TCL_NO_STACK_CHECK */
/*
*----------------------------------------------------------------------
generated by cgit v0.12 at 2024-11-05 16:25:04 (GMT)