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Make internal run_time_cache a persistent allocation (#15040)

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We also add zend_map_ptr_static, so that we do not incur the overhead of constantly recreating the internal run_time_cache pointers on each request.
This mechanism might be extended for mutable_data of internal classes too.
This commit is contained in:
Bob Weinand 2024-09-07 01:45:26 +02:00 committed by GitHub
parent 2f3224ea41
commit 25d761623c
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
11 changed files with 101 additions and 20 deletions
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55
Zend/zend.c
View File

@ -735,14 +735,16 @@ static void compiler_globals_ctor(zend_compiler_globals *compiler_globals) /* {{
compiler_globals->map_ptr_base = ZEND_MAP_PTR_BIASED_BASE(NULL);
compiler_globals->map_ptr_size = 0;
compiler_globals->map_ptr_last = global_map_ptr_last;
if (compiler_globals->map_ptr_last) {
compiler_globals->internal_run_time_cache = NULL;
if (compiler_globals->map_ptr_last || zend_map_ptr_static_size) {
/* Allocate map_ptr table */
compiler_globals->map_ptr_size = ZEND_MM_ALIGNED_SIZE_EX(compiler_globals->map_ptr_last, 4096);
void *base = pemalloc(compiler_globals->map_ptr_size * sizeof(void*), 1);
void *base = pemalloc((zend_map_ptr_static_size + compiler_globals->map_ptr_size) * sizeof(void*), 1);
compiler_globals->map_ptr_real_base = base;
compiler_globals->map_ptr_base = ZEND_MAP_PTR_BIASED_BASE(base);
memset(base, 0, compiler_globals->map_ptr_last * sizeof(void*));
memset(base, 0, (zend_map_ptr_static_size + compiler_globals->map_ptr_last) * sizeof(void*));
}
zend_init_internal_run_time_cache();
}
/* }}} */
@ -785,6 +787,10 @@ static void compiler_globals_dtor(zend_compiler_globals *compiler_globals) /* {{
compiler_globals->map_ptr_base = ZEND_MAP_PTR_BIASED_BASE(NULL);
compiler_globals->map_ptr_size = 0;
}
if (compiler_globals->internal_run_time_cache) {
pefree(compiler_globals->internal_run_time_cache, 1);
compiler_globals->internal_run_time_cache = NULL;
}
}
/* }}} */
@ -1115,6 +1121,10 @@ zend_result zend_post_startup(void) /* {{{ */
}
compiler_globals->map_ptr_real_base = NULL;
compiler_globals->map_ptr_base = ZEND_MAP_PTR_BIASED_BASE(NULL);
if (compiler_globals->internal_run_time_cache) {
pefree(compiler_globals->internal_run_time_cache, 1);
}
compiler_globals->internal_run_time_cache = NULL;
if ((script_encoding_list = (zend_encoding **)compiler_globals->script_encoding_list)) {
compiler_globals_ctor(compiler_globals);
compiler_globals->script_encoding_list = (const zend_encoding **)script_encoding_list;
@ -1198,6 +1208,9 @@ void zend_shutdown(void) /* {{{ */
CG(script_encoding_list_size) = 0;
}
#endif
zend_map_ptr_static_last = 0;
zend_map_ptr_static_size = 0;
zend_destroy_rsrc_list_dtors();
zend_unload_modules();
@ -1297,9 +1310,9 @@ ZEND_API void zend_activate(void) /* {{{ */
init_executor();
startup_scanner();
if (CG(map_ptr_last)) {
memset(CG(map_ptr_real_base), 0, CG(map_ptr_last) * sizeof(void*));
memset((void **)CG(map_ptr_real_base) + zend_map_ptr_static_size, 0, CG(map_ptr_last) * sizeof(void*));
}
zend_init_internal_run_time_cache();
zend_reset_internal_run_time_cache();
zend_observer_activate();
}
/* }}} */
@ -1984,6 +1997,9 @@ void free_estring(char **str_p) /* {{{ */
}
/* }}} */
ZEND_API size_t zend_map_ptr_static_size;
ZEND_API size_t zend_map_ptr_static_last;
ZEND_API void zend_map_ptr_reset(void)
{
CG(map_ptr_last) = global_map_ptr_last;
@ -1996,15 +2012,36 @@ ZEND_API void *zend_map_ptr_new(void)
if (CG(map_ptr_last) >= CG(map_ptr_size)) {
/* Grow map_ptr table */
CG(map_ptr_size) = ZEND_MM_ALIGNED_SIZE_EX(CG(map_ptr_last) + 1, 4096);
CG(map_ptr_real_base) = perealloc(CG(map_ptr_real_base), CG(map_ptr_size) * sizeof(void*), 1);
CG(map_ptr_real_base) = perealloc(CG(map_ptr_real_base), (zend_map_ptr_static_size + CG(map_ptr_size)) * sizeof(void*), 1);
CG(map_ptr_base) = ZEND_MAP_PTR_BIASED_BASE(CG(map_ptr_real_base));
}
ptr = (void**)CG(map_ptr_real_base) + CG(map_ptr_last);
ptr = (void**)CG(map_ptr_real_base) + zend_map_ptr_static_size + CG(map_ptr_last);
*ptr = NULL;
CG(map_ptr_last)++;
return ZEND_MAP_PTR_PTR2OFFSET(ptr);
}
ZEND_API void *zend_map_ptr_new_static(void)
{
void **ptr;
if (zend_map_ptr_static_last >= zend_map_ptr_static_size) {
zend_map_ptr_static_size += 4096;
/* Grow map_ptr table */
void *new_base = pemalloc((zend_map_ptr_static_size + CG(map_ptr_size)) * sizeof(void*), 1);
if (CG(map_ptr_real_base)) {
memcpy((void **)new_base + 4096, CG(map_ptr_real_base), (CG(map_ptr_last) + zend_map_ptr_static_size - 4096) * sizeof(void *));
pefree(CG(map_ptr_real_base), 1);
}
CG(map_ptr_real_base) = new_base;
CG(map_ptr_base) = ZEND_MAP_PTR_BIASED_BASE(new_base);
}
ptr = (void**)CG(map_ptr_real_base) + (zend_map_ptr_static_last & 4095);
*ptr = NULL;
zend_map_ptr_static_last++;
return ZEND_MAP_PTR_PTR2OFFSET(ptr);
}
ZEND_API void zend_map_ptr_extend(size_t last)
{
if (last > CG(map_ptr_last)) {
@ -2013,10 +2050,10 @@ ZEND_API void zend_map_ptr_extend(size_t last)
if (last >= CG(map_ptr_size)) {
/* Grow map_ptr table */
CG(map_ptr_size) = ZEND_MM_ALIGNED_SIZE_EX(last, 4096);
CG(map_ptr_real_base) = perealloc(CG(map_ptr_real_base), CG(map_ptr_size) * sizeof(void*), 1);
CG(map_ptr_real_base) = perealloc(CG(map_ptr_real_base), (zend_map_ptr_static_size + CG(map_ptr_size)) * sizeof(void*), 1);
CG(map_ptr_base) = ZEND_MAP_PTR_BIASED_BASE(CG(map_ptr_real_base));
}
ptr = (void**)CG(map_ptr_real_base) + CG(map_ptr_last);
ptr = (void**)CG(map_ptr_real_base) + zend_map_ptr_static_size + CG(map_ptr_last);
memset(ptr, 0, (last - CG(map_ptr_last)) * sizeof(void*));
CG(map_ptr_last) = last;
}

6
Zend/zend_API.c
View File

@ -2958,7 +2958,11 @@ ZEND_API zend_result zend_register_functions(zend_class_entry *scope, const zend
if (EG(active)) { // at run-time: this ought to only happen if registered with dl() or somehow temporarily at runtime
ZEND_MAP_PTR_INIT(internal_function->run_time_cache, zend_arena_calloc(&CG(arena), 1, zend_internal_run_time_cache_reserved_size()));
} else {
ZEND_MAP_PTR_NEW(internal_function->run_time_cache);
#if ZTS
ZEND_MAP_PTR_NEW_STATIC(internal_function->run_time_cache);
#else
ZEND_MAP_PTR_INIT(internal_function->run_time_cache, NULL);
#endif
}
if (ptr->flags) {
if (!(ptr->flags & ZEND_ACC_PPP_MASK)) {

6
Zend/zend_enum.c
View File

@ -421,7 +421,11 @@ static void zend_enum_register_func(zend_class_entry *ce, zend_known_string_id n
if (EG(active)) { // at run-time
ZEND_MAP_PTR_INIT(zif->run_time_cache, zend_arena_calloc(&CG(arena), 1, zend_internal_run_time_cache_reserved_size()));
} else {
ZEND_MAP_PTR_NEW(zif->run_time_cache);
#if ZTS
ZEND_MAP_PTR_NEW_STATIC(zif->run_time_cache);
#else
ZEND_MAP_PTR_INIT(zif->run_time_cache, NULL);
#endif
}
if (!zend_hash_add_ptr(&ce->function_table, name, zif)) {

19
Zend/zend_extensions.c
View File

@ -331,19 +331,22 @@ ZEND_API void zend_init_internal_run_time_cache(void) {
functions += zend_hash_num_elements(&ce->function_table);
} ZEND_HASH_FOREACH_END();
char *ptr = zend_arena_calloc(&CG(arena), functions, rt_size);
size_t alloc_size = functions * rt_size;
char *ptr = pemalloc(alloc_size, 1);
CG(internal_run_time_cache) = ptr;
CG(internal_run_time_cache_size) = alloc_size;
zend_internal_function *zif;
ZEND_HASH_MAP_FOREACH_PTR(CG(function_table), zif) {
if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL)
{
if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL) {
ZEND_MAP_PTR_SET(zif->run_time_cache, (void *)ptr);
ptr += rt_size;
}
} ZEND_HASH_FOREACH_END();
ZEND_HASH_MAP_FOREACH_PTR(CG(class_table), ce) {
ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, zif) {
if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL)
{
if (!ZEND_USER_CODE(zif->type) && ZEND_MAP_PTR_GET(zif->run_time_cache) == NULL) {
ZEND_MAP_PTR_SET(zif->run_time_cache, (void *)ptr);
ptr += rt_size;
}
@ -352,6 +355,12 @@ ZEND_API void zend_init_internal_run_time_cache(void) {
}
}
ZEND_API void zend_reset_internal_run_time_cache(void) {
if (CG(internal_run_time_cache)) {
memset(CG(internal_run_time_cache), 0, CG(internal_run_time_cache_size));
}
}
ZEND_API zend_extension *zend_get_extension(const char *extension_name)
{
zend_llist_element *element;

1
Zend/zend_extensions.h
View File

@ -149,6 +149,7 @@ void zend_shutdown_extensions(void);
ZEND_API size_t zend_internal_run_time_cache_reserved_size(void);
ZEND_API void zend_init_internal_run_time_cache(void);
ZEND_API void zend_reset_internal_run_time_cache(void);
BEGIN_EXTERN_C()
ZEND_API zend_result zend_load_extension(const char *path);

3
Zend/zend_globals.h
View File

@ -154,6 +154,9 @@ struct _zend_compiler_globals {
uint32_t rtd_key_counter;
void *internal_run_time_cache;
uint32_t internal_run_time_cache_size;
zend_stack short_circuiting_opnums;
#ifdef ZTS
uint32_t copied_functions_count;

13
Zend/zend_map_ptr.h
View File

@ -42,6 +42,9 @@ typedef struct _zend_string zend_string;
#define ZEND_MAP_PTR_NEW(ptr) do { \
ZEND_MAP_PTR(ptr) = zend_map_ptr_new(); \
} while (0)
#define ZEND_MAP_PTR_NEW_STATIC(ptr) do { \
ZEND_MAP_PTR(ptr) = zend_map_ptr_new_static(); \
} while (0)
#if ZEND_MAP_PTR_KIND == ZEND_MAP_PTR_KIND_PTR_OR_OFFSET
# define ZEND_MAP_PTR_NEW_OFFSET() \
@ -53,7 +56,7 @@ typedef struct _zend_string zend_string;
ZEND_MAP_PTR_GET_IMM(ptr) : \
((void*)(ZEND_MAP_PTR(ptr)))))
# define ZEND_MAP_PTR_GET_IMM(ptr) \
(*ZEND_MAP_PTR_OFFSET2PTR((uintptr_t)ZEND_MAP_PTR(ptr)))
(*ZEND_MAP_PTR_OFFSET2PTR((intptr_t)ZEND_MAP_PTR(ptr)))
# define ZEND_MAP_PTR_SET(ptr, val) do { \
if (ZEND_MAP_PTR_IS_OFFSET(ptr)) { \
ZEND_MAP_PTR_SET_IMM(ptr, val); \
@ -62,11 +65,11 @@ typedef struct _zend_string zend_string;
} \
} while (0)
# define ZEND_MAP_PTR_SET_IMM(ptr, val) do { \
void **__p = ZEND_MAP_PTR_OFFSET2PTR((uintptr_t)ZEND_MAP_PTR(ptr)); \
void **__p = ZEND_MAP_PTR_OFFSET2PTR((intptr_t)ZEND_MAP_PTR(ptr)); \
*__p = (val); \
} while (0)
# define ZEND_MAP_PTR_BIASED_BASE(real_base) \
((void*)(((uintptr_t)(real_base)) - 1))
((void*)(((uintptr_t)(real_base)) + zend_map_ptr_static_size * sizeof(void *) - 1))
#else
# error "Unknown ZEND_MAP_PTR_KIND"
#endif
@ -75,9 +78,13 @@ BEGIN_EXTERN_C()
ZEND_API void zend_map_ptr_reset(void);
ZEND_API void *zend_map_ptr_new(void);
ZEND_API void *zend_map_ptr_new_static(void);
ZEND_API void zend_map_ptr_extend(size_t last);
ZEND_API void zend_alloc_ce_cache(zend_string *type_name);
ZEND_API extern size_t zend_map_ptr_static_last;
ZEND_API extern size_t zend_map_ptr_static_size;
END_EXTERN_C()
#endif /* ZEND_MAP_PTR_H */

5
ext/ffi/ffi.c
View File

@ -5393,6 +5393,11 @@ static zend_result ffi_fixup_temporaries(void) {
++zend_ffi_cast_fn.T;
++zend_ffi_type_fn.T;
}
#if !ZTS
ZEND_MAP_PTR(zend_ffi_new_fn.run_time_cache) = ZEND_MAP_PTR(((zend_internal_function *)zend_hash_str_find_ptr(&zend_ffi_ce->function_table, "new", sizeof("new")-1))->run_time_cache);
ZEND_MAP_PTR(zend_ffi_cast_fn.run_time_cache) = ZEND_MAP_PTR(((zend_internal_function *)zend_hash_str_find_ptr(&zend_ffi_ce->function_table, "cast", sizeof("cast")-1))->run_time_cache);
ZEND_MAP_PTR(zend_ffi_type_fn.run_time_cache) = ZEND_MAP_PTR(((zend_internal_function *)zend_hash_str_find_ptr(&zend_ffi_ce->function_table, "type", sizeof("type")-1))->run_time_cache);
#endif
if (prev_zend_post_startup_cb) {
return prev_zend_post_startup_cb();
}

6
ext/opcache/jit/zend_jit_ir.c
View File

@ -4534,8 +4534,12 @@ static struct jit_observer_fcall_is_unobserved_data jit_observer_fcall_is_unobse
if (func && (func->common.fn_flags & ZEND_ACC_CLOSURE) == 0 && ZEND_MAP_PTR_IS_OFFSET(func->common.run_time_cache)) {
// JIT: ZEND_MAP_PTR_GET_IMM(func->common.runtime_cache)
run_time_cache = ir_LOAD_A(ir_ADD_OFFSET(ir_LOAD_A(jit_CG(map_ptr_base)), (uintptr_t)ZEND_MAP_PTR(func->common.run_time_cache)));
#if !ZTS
} else if (func && rx == IS_UNUSED) { // happens for internal functions only
ZEND_ASSERT(!ZEND_USER_CODE(func->type));
run_time_cache = ir_LOAD_A(ir_ADD_OFFSET(ir_CONST_ADDR(func), offsetof(zend_op_array, run_time_cache__ptr)));
#endif
} else {
ZEND_ASSERT(rx != IR_UNUSED);
// Closures may be duplicated and have a different runtime cache. Use the regular run_time_cache access pattern for these
if (func && ZEND_USER_CODE(func->type)) { // not a closure and definitely not an internal function
run_time_cache = ir_LOAD_A(jit_CALL(rx, run_time_cache));

4
ext/xmlreader/php_xmlreader.c
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@ -1276,6 +1276,10 @@ static zend_result xmlreader_fixup_temporaries(void) {
++xmlreader_open_fn.T;
++xmlreader_xml_fn.T;
}
#if !ZTS
ZEND_MAP_PTR(xmlreader_open_fn.run_time_cache) = ZEND_MAP_PTR(((zend_internal_function *)zend_hash_str_find_ptr(&xmlreader_class_entry->function_table, "open", sizeof("open")-1))->run_time_cache);
ZEND_MAP_PTR(xmlreader_xml_fn.run_time_cache) = ZEND_MAP_PTR(((zend_internal_function *)zend_hash_str_find_ptr(&xmlreader_class_entry->function_table, "xml", sizeof("xml")-1))->run_time_cache);
#endif
if (prev_zend_post_startup_cb) {
return prev_zend_post_startup_cb();
}

3
main/main.c
View File

@ -2316,6 +2316,9 @@ zend_result php_module_startup(sapi_module_struct *sf, zend_module_entry *additi
/* freeze the list of observer fcall_init handlers */
zend_observer_post_startup();
/* freeze the list of persistent internal functions */
zend_init_internal_run_time_cache();
/* Extensions that add engine hooks after this point do so at their own peril */
zend_finalize_system_id();