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| author | dgp <dgp@users.sourceforge.net> | 2011-06-21 14:09:31 (GMT) |
|---|---|---|
| committer | dgp <dgp@users.sourceforge.net> | 2011-06-21 14:09:31 (GMT) |
| commit | 83102e6f2f98d36d59b7b69132074e9724dc2feb (patch) | |
| tree | 429c7a079c9e330badf90fa60fbe2fd7f46f64f1 /generic/tclLink.c | |
| parent | 5bc58dfd6d5f986104e6427cd158cacfbfcd6a70 (diff) | |
| download | tcl-83102e6f2f98d36d59b7b69132074e9724dc2feb.zip tcl-83102e6f2f98d36d59b7b69132074e9724dc2feb.tar.gz tcl-83102e6f2f98d36d59b7b69132074e9724dc2feb.tar.bz2 | |
3317466 Prevent multiple Tcl_LinkVar() links to a single Tcl variable.
Diffstat (limited to 'generic/tclLink.c')
| -rw-r--r-- | generic/tclLink.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/generic/tclLink.c b/generic/tclLink.c index df8b16a..f7911a4 100644 --- a/generic/tclLink.c +++ b/generic/tclLink.c @@ -112,6 +112,14 @@ Tcl_LinkVar( Link *linkPtr; int code; + linkPtr = (Link *) Tcl_VarTraceInfo(interp, varName, TCL_GLOBAL_ONLY, + LinkTraceProc, (ClientData) NULL); + if (linkPtr != NULL) { + Tcl_SetObjResult(interp, Tcl_ObjPrintf( + "variable '%s' is already linked", varName)); + return TCL_ERROR; + } + linkPtr = (Link *) ckalloc(sizeof(Link)); linkPtr->interp = interp; linkPtr->varName = Tcl_NewStringObj(varName, -1); |