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thread: Use a flexible array member for "array" in SDL_TLSData.

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Avoids UBSan warning (among other similar ones in SDL_thread.c):
src/thread/SDL_thread.c:109:13: runtime error: index 1 out of bounds for type 'struct (unnamed struct at src/thread/SDL_thread_c.h:70:5)[1]'
SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior src/thread/SDL_thread.c:109:13
This commit is contained in:
William Horvath
2026-01-15 17:11:55 -08:00
committed by Sam Lantinga
parent e62d6a95b9
commit f9395a766f
2 changed files with 9 additions and 2 deletions
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9
src/thread/SDL_thread_c.h
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@@ -67,11 +67,18 @@ extern void SDL_RunThread(SDL_Thread *thread);
typedef struct
{
int limit;
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4200) // Flexible array members (C99)
#endif
struct
{
void *data;
void(SDLCALL *destructor)(void *);
} array[1];
} array[];
#ifdef _MSC_VER
#pragma warning(pop)
#endif
} SDL_TLSData;
// This is how many TLS entries we allocate at once