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Issue #21951: Use attemptckalloc() instead of ckalloc() in Tkinter. 

ckalloc() causes the Tcl interpreter to panic, attemptckalloc() returns NULL
if the memory allocation fails.
This commit is contained in:
Serhiy Storchaka 2014-09-11 10:38:54 +03:00
parent 31a3ec313d
commit 0794088379
2 changed files with 29 additions and 10 deletions
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3
Misc/NEWS
View File

@ -32,6 +32,9 @@ Core and Builtins
Library
-------
- Issue #21951: Tkinter now most likely raises MemoryError instead of crash
if the memory allocation fails.
- Issue #22338: Fix a crash in the json module on memory allocation failure.
- Issue #22226: First letter no longer is stripped from the "status" key in

36
Modules/_tkinter.c
View File

@ -598,7 +598,7 @@ Tkapp_New(char *screenName, char *className,
Tcl_SetVar(v->interp, "tcl_interactive", "0", TCL_GLOBAL_ONLY);
/* This is used to get the application class for Tk 4.1 and up */
argv0 = (char*)ckalloc(strlen(className) + 1);
argv0 = (char*)attemptckalloc(strlen(className) + 1);
if (!argv0) {
PyErr_NoMemory();
Py_DECREF(v);
@ -632,7 +632,7 @@ Tkapp_New(char *screenName, char *className,
if (use)
len += strlen(use) + sizeof "-use ";
args = (char*)ckalloc(len);
args = (char*)attemptckalloc(len);
if (!args) {
PyErr_NoMemory();
Py_DECREF(v);
@ -903,7 +903,7 @@ AsObj(PyObject *value)
PyErr_SetString(PyExc_OverflowError, "tuple is too long");
return NULL;
}
argv = (Tcl_Obj **) ckalloc(((size_t)size) * sizeof(Tcl_Obj *));
argv = (Tcl_Obj **) attemptckalloc(((size_t)size) * sizeof(Tcl_Obj *));
if(!argv)
return 0;
for (i = 0; i < size; i++)
@ -933,7 +933,7 @@ AsObj(PyObject *value)
if (kind == sizeof(Tcl_UniChar))
return Tcl_NewUnicodeObj(inbuf, size);
allocsize = ((size_t)size) * sizeof(Tcl_UniChar);
outbuf = (Tcl_UniChar*)ckalloc(allocsize);
outbuf = (Tcl_UniChar*)attemptckalloc(allocsize);
/* Else overflow occurred, and we take the next exit */
if (!outbuf) {
PyErr_NoMemory();
@ -1098,7 +1098,7 @@ Tkapp_CallArgs(PyObject *args, Tcl_Obj** objStore, int *pobjc)
PyErr_SetString(PyExc_OverflowError, "tuple is too long");
return NULL;
}
objv = (Tcl_Obj **)ckalloc(((size_t)objc) * sizeof(Tcl_Obj *));
objv = (Tcl_Obj **)attemptckalloc(((size_t)objc) * sizeof(Tcl_Obj *));
if (objv == NULL) {
PyErr_NoMemory();
objc = 0;
@ -1234,7 +1234,11 @@ Tkapp_Call(PyObject *selfptr, PyObject *args)
PyObject *exc_type, *exc_value, *exc_tb;
if (!WaitForMainloop(self))
return NULL;
ev = (Tkapp_CallEvent*)ckalloc(sizeof(Tkapp_CallEvent));
ev = (Tkapp_CallEvent*)attemptckalloc(sizeof(Tkapp_CallEvent));
if (ev == NULL) {
PyErr_NoMemory();
return NULL;
}
ev->ev.proc = (Tcl_EventProc*)Tkapp_CallProc;
ev->self = self;
ev->args = args;
@ -1485,8 +1489,11 @@ var_invoke(EventFunc func, PyObject *selfptr, PyObject *args, int flags)
if (!WaitForMainloop(self))
return NULL;
ev = (VarEvent*)ckalloc(sizeof(VarEvent));
ev = (VarEvent*)attemptckalloc(sizeof(VarEvent));
if (ev == NULL) {
PyErr_NoMemory();
return NULL;
}
ev->self = selfptr;
ev->args = args;
ev->flags = flags;
@ -2082,7 +2089,12 @@ Tkapp_CreateCommand(PyObject *selfptr, PyObject *args)
#ifdef WITH_THREAD
if (self->threaded && self->thread_id != Tcl_GetCurrentThread()) {
Tcl_Condition cond = NULL;
CommandEvent *ev = (CommandEvent*)ckalloc(sizeof(CommandEvent));
CommandEvent *ev = (CommandEvent*)attemptckalloc(sizeof(CommandEvent));
if (ev == NULL) {
PyErr_NoMemory();
PyMem_DEL(data);
return NULL;
}
ev->ev.proc = (Tcl_EventProc*)Tkapp_CommandProc;
ev->interp = self->interp;
ev->create = 1;
@ -2128,7 +2140,11 @@ Tkapp_DeleteCommand(PyObject *selfptr, PyObject *args)
if (self->threaded && self->thread_id != Tcl_GetCurrentThread()) {
Tcl_Condition cond = NULL;
CommandEvent *ev;
ev = (CommandEvent*)ckalloc(sizeof(CommandEvent));
ev = (CommandEvent*)attemptckalloc(sizeof(CommandEvent));
if (ev == NULL) {
PyErr_NoMemory();
return NULL;
}
ev->ev.proc = (Tcl_EventProc*)Tkapp_CommandProc;
ev->interp = self->interp;
ev->create = 0;