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[3.13] gh-133256: Add _Py_NONSTRING macro (#133257) #135135

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Merged
merged 1 commit into from
Jun 4, 2025
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[3.13] gh-133256: Add _Py_NONSTRING macro (#133257) #135135

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2 changes: 1 addition & 1 deletion Include/internal/pycore_runtime.h
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ typedef struct _Py_AuditHookEntry {
} _Py_AuditHookEntry;

typedef struct _Py_DebugOffsets {
char cookie[8];
char cookie[8] _Py_NONSTRING;
uint64_t version;
uint64_t free_threaded;
// Runtime state offset;
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24 changes: 24 additions & 0 deletions Include/pyport.h
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Expand Up @@ -541,6 +541,14 @@ extern "C" {
# define _Py__has_builtin(x) 0
#endif

// Preprocessor check for a compiler __attribute__. Always return 0
// if __has_attribute() macro is not defined.
#ifdef __has_attribute
# define _Py__has_attribute(x) __has_attribute(x)
#else
# define _Py__has_attribute(x) 0
#endif

// _Py_TYPEOF(expr) gets the type of an expression.
//
// Example: _Py_TYPEOF(x) x_copy = (x);
Expand Down Expand Up @@ -606,4 +614,20 @@ extern "C" {
# define _SGI_MP_SOURCE
#endif


// _Py_NONSTRING: The nonstring variable attribute specifies that an object or
// member declaration with type array of char, signed char, or unsigned char,
// or pointer to such a type is intended to store character arrays that do not
// necessarily contain a terminating NUL.
//
// Usage:
//
// char name [8] _Py_NONSTRING;
#if _Py__has_attribute(nonstring)
# define _Py_NONSTRING __attribute__((nonstring))
#else
# define _Py_NONSTRING
#endif


#endif /* Py_PYPORT_H */
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