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gh-111178: fix UBSan failures in Modules/_tkinter.c #129795

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Merged
encukou merged 10 commits into from
Feb 26, 2025
Merged

gh-111178: fix UBSan failures in Modules/_tkinter.c #129795

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cfced14
fix UBSan failures for `TkappObject`
picnixz Jan 25, 2025
d2b723d
fix UBSan failures for `PyTclObject`
picnixz Jan 25, 2025
8c0e55e
fix UBSan failures for `TkttObject`
picnixz Jan 25, 2025
5b6a755
Merge remote-tracking branch 'upstream/main' into fix/ubsan/tkinter-1…
picnixz Feb 7, 2025
9662528
Do Do not use `_` + capital letter in new code as it is also UB.
picnixz Feb 8, 2025
6df44b6
fix compilation
picnixz Feb 8, 2025
49fc5c6
Merge branch 'main' into fix/ubsan/tkinter-111178
encukou Feb 18, 2025
08efc4c
remove unused `TkttObject_FAST_CAST` macro
picnixz Feb 25, 2025
f5f4efc
remove redundant macros and improve `CHECK_TCL_APPARTMENT`
picnixz Feb 25, 2025
5f2287c
implement CHECK_TCL_APPARTMENT as a static inline function
picnixz Feb 25, 2025
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implement CHECK_TCL_APPARTMENT as a static inline function
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@picnixz
picnixz committed Feb 25, 2025
commit 5f2287cd409e5cdddf5c009821af3648c25a3233
28 changes: 18 additions & 10 deletions Modules/_tkinter.c
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Original file line number Diff line number Diff line change
Expand Up @@ -289,16 +289,6 @@ static PyThreadState *tcl_tstate = NULL;
if(tcl_lock)PyThread_acquire_lock(tcl_lock, 1); \
tcl_tstate = tstate; }

#define CHECK_TCL_APPARTMENT(op) \
do { \
TkappObject *app = TkappObject_CAST(op); \
if (app->threaded && app->thread_id != Tcl_GetCurrentThread()) { \
PyErr_SetString(PyExc_RuntimeError, \
"Calling Tcl from different apartment"); \
return 0; \
} \
} while (0)

#ifndef FREECAST
#define FREECAST (char *)
#endif
Expand Down Expand Up @@ -333,6 +323,24 @@ typedef struct {
#define TkappObject_CAST(op) ((TkappObject *)(op))
#define Tkapp_Interp(v) (TkappObject_CAST(v)->interp)

static inline int
check_tcl_appartment(TkappObject *app)
{
if (app->threaded && app->thread_id != Tcl_GetCurrentThread()) {
PyErr_SetString(PyExc_RuntimeError,
"Calling Tcl from different apartment");
return -1;
}
return 0;
}

#define CHECK_TCL_APPARTMENT(APP) \
do { \
if (check_tcl_appartment(APP) < 0) { \
return 0; \
} \
} while (0)


/**** Error Handling ****/

Expand Down