May 19, 2025 · May 19, 2025
diff --git a/numpy/_core/src/multiarray/alloc.c b/numpy/_core/src/multiarray/alloc.c
 }


 /* Do not enable the alloc cache if the GIL is disabled, or if ASAN or MSAN
 * instrumentation is enabled. The cache makes ASAN use-after-free or MSAN
 * use-of-uninitialized-memory warnings less useful. */
 #ifdef Py_GIL_DISABLED
 #define USE_ALLOC_CACHE 0
 #elif defined(__has_feature)
 # if __has_feature(address_sanitizer) || __has_feature(memory_sanitizer)
 # define USE_ALLOC_CACHE 0
 # endif
 #else
 #define USE_ALLOC_CACHE 1
 #endif


 /* as the cache is managed in global variables verify the GIL is held */

 /*
    assert((esz == 1 && cache == datacache) ||
           (esz == sizeof(npy_intp) && cache == dimcache));
    assert(PyGILState_Check());
 #ifndef Py_GIL_DISABLED
 #if USE_ALLOC_CACHE
    if (nelem < msz) {
        if (cache[nelem].available > 0) {
            return cache[nelem].ptrs[--(cache[nelem].available)];
                cache_bucket * cache, void (*dealloc)(void *))
 {
    assert(PyGILState_Check());
 #ifndef Py_GIL_DISABLED
 #if USE_ALLOC_CACHE
    if (p != NULL && nelem < msz) {
        if (cache[nelem].available < NCACHE) {
            cache[nelem].ptrs[cache[nelem].available++] = p;
Original file line number	Diff line number	Diff line change
Expand Up		@@ -99,6 +99,20 @@ indicate_hugepages(void *p, size_t size) {
		}


		/* Do not enable the alloc cache if the GIL is disabled, or if ASAN or MSAN
		* instrumentation is enabled. The cache makes ASAN use-after-free or MSAN
		* use-of-uninitialized-memory warnings less useful. */
		#ifdef Py_GIL_DISABLED
		#define USE_ALLOC_CACHE 0
		#elif defined(__has_feature)
		# if __has_feature(address_sanitizer) \|\| __has_feature(memory_sanitizer)
		# define USE_ALLOC_CACHE 0
		# endif
		#else
		#define USE_ALLOC_CACHE 1
		#endif


		/* as the cache is managed in global variables verify the GIL is held */

		/*
Expand All		@@ -115,7 +129,7 @@ _npy_alloc_cache(npy_uintp nelem, npy_uintp esz, npy_uint msz,
		assert((esz == 1 && cache == datacache) \|\|
		(esz == sizeof(npy_intp) && cache == dimcache));
		assert(PyGILState_Check());
		#ifndef Py_GIL_DISABLED
		#if USE_ALLOC_CACHE
		if (nelem < msz) {
		if (cache[nelem].available > 0) {
		return cache[nelem].ptrs[--(cache[nelem].available)];
Expand All		@@ -141,7 +155,7 @@ _npy_free_cache(void * p, npy_uintp nelem, npy_uint msz,
		cache_bucket * cache, void (dealloc)(void ))
		{
		assert(PyGILState_Check());
		#ifndef Py_GIL_DISABLED
		#if USE_ALLOC_CACHE
		if (p != NULL && nelem < msz) {
		if (cache[nelem].available < NCACHE) {
		cache[nelem].ptrs[cache[nelem].available++] = p;
Expand Down