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authormonster <[email protected]>2022-07-07 14:41:37 +0300
committermonster <[email protected]>2022-07-07 14:41:37 +0300
commit06e5c21a835c0e923506c4ff27929f34e00761c2 (patch)
tree75efcbc6854ef9bd476eb8bf00cc5c900da436a2 /contrib/libs/cxxsupp/builtins/emutls.c
parent03f024c4412e3aa613bb543cf1660176320ba8f4 (diff)
fix ya.make
Diffstat (limited to 'contrib/libs/cxxsupp/builtins/emutls.c')
-rw-r--r--contrib/libs/cxxsupp/builtins/emutls.c183
1 files changed, 0 insertions, 183 deletions
diff --git a/contrib/libs/cxxsupp/builtins/emutls.c b/contrib/libs/cxxsupp/builtins/emutls.c
deleted file mode 100644
index 09e79568bd5..00000000000
--- a/contrib/libs/cxxsupp/builtins/emutls.c
+++ /dev/null
@@ -1,183 +0,0 @@
-/* ===---------- emutls.c - Implements __emutls_get_address ---------------===
- *
- * The LLVM Compiler Infrastructure
- *
- * This file is dual licensed under the MIT and the University of Illinois Open
- * Source Licenses. See LICENSE.TXT for details.
- *
- * ===----------------------------------------------------------------------===
- */
-#include <pthread.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "int_lib.h"
-#include "int_util.h"
-
-/* Default is not to use posix_memalign, so systems like Android
- * can use thread local data without heavier POSIX memory allocators.
- */
-#ifndef EMUTLS_USE_POSIX_MEMALIGN
-#define EMUTLS_USE_POSIX_MEMALIGN 0
-#endif
-
-/* For every TLS variable xyz,
- * there is one __emutls_control variable named __emutls_v.xyz.
- * If xyz has non-zero initial value, __emutls_v.xyz's "value"
- * will point to __emutls_t.xyz, which has the initial value.
- */
-typedef struct __emutls_control {
- size_t size; /* size of the object in bytes */
- size_t align; /* alignment of the object in bytes */
- union {
- uintptr_t index; /* data[index-1] is the object address */
- void* address; /* object address, when in single thread env */
- } object;
- void* value; /* null or non-zero initial value for the object */
-} __emutls_control;
-
-static __inline void *emutls_memalign_alloc(size_t align, size_t size) {
- void *base;
-#if EMUTLS_USE_POSIX_MEMALIGN
- if (posix_memalign(&base, align, size) != 0)
- abort();
-#else
- #define EXTRA_ALIGN_PTR_BYTES (align - 1 + sizeof(void*))
- char* object;
- if ((object = malloc(EXTRA_ALIGN_PTR_BYTES + size)) == NULL)
- abort();
- base = (void*)(((uintptr_t)(object + EXTRA_ALIGN_PTR_BYTES))
- & ~(uintptr_t)(align - 1));
-
- ((void**)base)[-1] = object;
-#endif
- return base;
-}
-
-static __inline void emutls_memalign_free(void *base) {
-#if EMUTLS_USE_POSIX_MEMALIGN
- free(base);
-#else
- /* The mallocated address is in ((void**)base)[-1] */
- free(((void**)base)[-1]);
-#endif
-}
-
-/* Emulated TLS objects are always allocated at run-time. */
-static __inline void *emutls_allocate_object(__emutls_control *control) {
- /* Use standard C types, check with gcc's emutls.o. */
- typedef unsigned int gcc_word __attribute__((mode(word)));
- typedef unsigned int gcc_pointer __attribute__((mode(pointer)));
- COMPILE_TIME_ASSERT(sizeof(size_t) == sizeof(gcc_word));
- COMPILE_TIME_ASSERT(sizeof(uintptr_t) == sizeof(gcc_pointer));
- COMPILE_TIME_ASSERT(sizeof(uintptr_t) == sizeof(void*));
-
- size_t size = control->size;
- size_t align = control->align;
- if (align < sizeof(void*))
- align = sizeof(void*);
- /* Make sure that align is power of 2. */
- if ((align & (align - 1)) != 0)
- abort();
-
- void* base = emutls_memalign_alloc(align, size);
- if (control->value)
- memcpy(base, control->value, size);
- else
- memset(base, 0, size);
- return base;
-}
-
-static pthread_mutex_t emutls_mutex = PTHREAD_MUTEX_INITIALIZER;
-
-static size_t emutls_num_object = 0; /* number of allocated TLS objects */
-
-typedef struct emutls_address_array {
- uintptr_t size; /* number of elements in the 'data' array */
- void* data[];
-} emutls_address_array;
-
-static pthread_key_t emutls_pthread_key;
-
-static void emutls_key_destructor(void* ptr) {
- emutls_address_array* array = (emutls_address_array*)ptr;
- uintptr_t i;
- for (i = 0; i < array->size; ++i) {
- if (array->data[i])
- emutls_memalign_free(array->data[i]);
- }
- free(ptr);
-}
-
-static void emutls_init(void) {
- if (pthread_key_create(&emutls_pthread_key, emutls_key_destructor) != 0)
- abort();
-}
-
-/* Returns control->object.index; set index if not allocated yet. */
-static __inline uintptr_t emutls_get_index(__emutls_control *control) {
- uintptr_t index = __atomic_load_n(&control->object.index, __ATOMIC_ACQUIRE);
- if (!index) {
- static pthread_once_t once = PTHREAD_ONCE_INIT;
- pthread_once(&once, emutls_init);
- pthread_mutex_lock(&emutls_mutex);
- index = control->object.index;
- if (!index) {
- index = ++emutls_num_object;
- __atomic_store_n(&control->object.index, index, __ATOMIC_RELEASE);
- }
- pthread_mutex_unlock(&emutls_mutex);
- }
- return index;
-}
-
-/* Updates newly allocated thread local emutls_address_array. */
-static __inline void emutls_check_array_set_size(emutls_address_array *array,
- uintptr_t size) {
- if (array == NULL)
- abort();
- array->size = size;
- pthread_setspecific(emutls_pthread_key, (void*)array);
-}
-
-/* Returns the new 'data' array size, number of elements,
- * which must be no smaller than the given index.
- */
-static __inline uintptr_t emutls_new_data_array_size(uintptr_t index) {
- /* Need to allocate emutls_address_array with one extra slot
- * to store the data array size.
- * Round up the emutls_address_array size to multiple of 16.
- */
- return ((index + 1 + 15) & ~((uintptr_t)15)) - 1;
-}
-
-/* Returns the thread local emutls_address_array.
- * Extends its size if necessary to hold address at index.
- */
-static __inline emutls_address_array *
-emutls_get_address_array(uintptr_t index) {
- emutls_address_array* array = pthread_getspecific(emutls_pthread_key);
- if (array == NULL) {
- uintptr_t new_size = emutls_new_data_array_size(index);
- array = calloc(new_size + 1, sizeof(void*));
- emutls_check_array_set_size(array, new_size);
- } else if (index > array->size) {
- uintptr_t orig_size = array->size;
- uintptr_t new_size = emutls_new_data_array_size(index);
- array = realloc(array, (new_size + 1) * sizeof(void*));
- if (array)
- memset(array->data + orig_size, 0,
- (new_size - orig_size) * sizeof(void*));
- emutls_check_array_set_size(array, new_size);
- }
- return array;
-}
-
-void* __emutls_get_address(__emutls_control* control) {
- uintptr_t index = emutls_get_index(control);
- emutls_address_array* array = emutls_get_address_array(index);
- if (array->data[index - 1] == NULL)
- array->data[index - 1] = emutls_allocate_object(control);
- return array->data[index - 1];
-}