ZendAccelerator.c

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/*
   +----------------------------------------------------------------------+
   | Zend OPcache                                                         |
   +----------------------------------------------------------------------+
   | Copyright (c) The PHP Group                                          |
   +----------------------------------------------------------------------+
   | This source file is subject to version 3.01 of the PHP license,      |
   | that is bundled with this package in the file LICENSE, and is        |
   | available through the world-wide-web at the following url:           |
   | https://www.php.net/license/3_01.txt                                 |
   | If you did not receive a copy of the PHP license and are unable to   |
   | obtain it through the world-wide-web, please send a note to          |
   | license@php.net so we can mail you a copy immediately.               |
   +----------------------------------------------------------------------+
   | Authors: Andi Gutmans <andi@php.net>                                 |
   |          Zeev Suraski <zeev@php.net>                                 |
   |          Stanislav Malyshev <stas@zend.com>                          |
   |          Dmitry Stogov <dmitry@php.net>                              |
   +----------------------------------------------------------------------+
*/
 
#include "main/php.h"
#include "main/php_globals.h"
#include "zend.h"
#include "zend_extensions.h"
#include "zend_compile.h"
#include "ZendAccelerator.h"
#include "zend_persist.h"
#include "zend_shared_alloc.h"
#include "zend_accelerator_module.h"
#include "zend_accelerator_blacklist.h"
#include "zend_list.h"
#include "zend_execute.h"
#include "zend_vm.h"
#include "zend_inheritance.h"
#include "zend_exceptions.h"
#include "zend_mmap.h"
#include "zend_observer.h"
#include "main/php_main.h"
#include "main/SAPI.h"
#include "main/php_streams.h"
#include "main/php_open_temporary_file.h"
#include "zend_API.h"
#include "zend_ini.h"
#include "zend_virtual_cwd.h"
#include "zend_accelerator_util_funcs.h"
#include "zend_accelerator_hash.h"
#include "zend_file_cache.h"
#include "ext/pcre/php_pcre.h"
#include "ext/standard/basic_functions.h"
 
#ifdef ZEND_WIN32
# include "ext/hash/php_hash.h"
# include "ext/standard/md5.h"
#endif
 
#ifdef HAVE_JIT
# include "jit/zend_jit.h"
#endif
 
#ifndef ZEND_WIN32
#include  <netdb.h>
#endif
 
#ifdef ZEND_WIN32
typedef int uid_t;
typedef int gid_t;
#include <io.h>
#include <lmcons.h>
#endif
 
#ifndef ZEND_WIN32
# include <sys/time.h>
#else
# include <process.h>
#endif
 
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <signal.h>
#include <time.h>
 
#ifndef ZEND_WIN32
# include <sys/types.h>
# include <sys/wait.h>
# include <sys/ipc.h>
# include <pwd.h>
# include <grp.h>
#endif
 
#include <sys/stat.h>
#include <errno.h>
 
#ifdef __AVX__
#include <immintrin.h>
#endif
 
ZEND_EXTENSION();
 
#ifndef ZTS
zend_accel_globals accel_globals;
#else
int accel_globals_id;
#if defined(COMPILE_DL_OPCACHE)
ZEND_TSRMLS_CACHE_DEFINE()
#endif
#endif
 
/* Points to the structure shared across all PHP processes */
zend_accel_shared_globals *accel_shared_globals = NULL;
 
/* true globals, no need for thread safety */
#ifdef ZEND_WIN32
char accel_uname_id[32];
#endif
bool accel_startup_ok = false;
static const char *zps_failure_reason = NULL;
const char *zps_api_failure_reason = NULL;
bool file_cache_only = false;  /* process uses file cache only */
#if ENABLE_FILE_CACHE_FALLBACK
bool fallback_process = false; /* process uses file cache fallback */
#endif
 
static zend_op_array *(*accelerator_orig_compile_file)(zend_file_handle *file_handle, int type);
static zend_class_entry* (*accelerator_orig_inheritance_cache_get)(zend_class_entry *ce, zend_class_entry *parent, zend_class_entry **traits_and_interfaces);
static zend_class_entry* (*accelerator_orig_inheritance_cache_add)(zend_class_entry *ce, zend_class_entry *proto, zend_class_entry *parent, zend_class_entry **traits_and_interfaces, HashTable *dependencies);
static zend_result (*accelerator_orig_zend_stream_open_function)(zend_file_handle *handle );
static zend_string *(*accelerator_orig_zend_resolve_path)(zend_string *filename);
static zif_handler orig_chdir = NULL;
static ZEND_INI_MH((*orig_include_path_on_modify)) = NULL;
static zend_result (*orig_post_startup_cb)(void);
 
static zend_result accel_post_startup(void);
static zend_result accel_finish_startup(void);
 
static void preload_shutdown(void);
static void preload_activate(void);
static void preload_restart(void);
 
#ifdef ZEND_WIN32
# define INCREMENT(v) InterlockedIncrement64(&ZCSG(v))
# define DECREMENT(v) InterlockedDecrement64(&ZCSG(v))
# define LOCKVAL(v)   (ZCSG(v))
#endif
 
#define ZCG_KEY_LEN (MAXPATHLEN * 8)

static void bzero_aligned(void *mem, size_t size)
{
#if defined(__x86_64__)
    memset(mem, 0, size);
#elif defined(__AVX__)
    char *p = (char*)mem;
    char *end = p + size;
    __m256i ymm0 = _mm256_setzero_si256();
 
    while (p < end) {
        _mm256_store_si256((__m256i*)p, ymm0);
        _mm256_store_si256((__m256i*)(p+32), ymm0);
        p += 64;
    }
#elif defined(__SSE2__)
    char *p = (char*)mem;
    char *end = p + size;
    __m128i xmm0 = _mm_setzero_si128();
 
    while (p < end) {
        _mm_store_si128((__m128i*)p, xmm0);
        _mm_store_si128((__m128i*)(p+16), xmm0);
        _mm_store_si128((__m128i*)(p+32), xmm0);
        _mm_store_si128((__m128i*)(p+48), xmm0);
        p += 64;
    }
#else
    memset(mem, 0, size);
#endif
}
 
#ifdef ZEND_WIN32
static time_t zend_accel_get_time(void)
{
    FILETIME now;
    GetSystemTimeAsFileTime(&now);
 
    return (time_t) ((((((__int64)now.dwHighDateTime) << 32)|now.dwLowDateTime) - 116444736000000000L)/10000000);
}
#else
# define zend_accel_get_time() time(NULL)
#endif
 
static inline bool is_cacheable_stream_path(const char *filename)
{
    return memcmp(filename, "file://", sizeof("file://") - 1) == 0 ||
           memcmp(filename, "phar://", sizeof("phar://") - 1) == 0;
}
 
/* O+ overrides PHP chdir() function and remembers the current working directory
 * in ZCG(cwd) and ZCG(cwd_len). Later accel_getcwd() can use stored value and
 * avoid getcwd() call.
 */
static ZEND_FUNCTION(accel_chdir)
{
    char cwd[MAXPATHLEN];
 
    orig_chdir(INTERNAL_FUNCTION_PARAM_PASSTHRU);
    if (VCWD_GETCWD(cwd, MAXPATHLEN)) {
        if (ZCG(cwd)) {
            zend_string_release_ex(ZCG(cwd), 0);
        }
        ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
    } else {
        if (ZCG(cwd)) {
            zend_string_release_ex(ZCG(cwd), 0);
            ZCG(cwd) = NULL;
        }
    }
    ZCG(cwd_key_len) = 0;
    ZCG(cwd_check) = true;
}
 
static inline zend_string* accel_getcwd(void)
{
    if (ZCG(cwd)) {
        return ZCG(cwd);
    } else {
        char cwd[MAXPATHLEN + 1];
 
        if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
            return NULL;
        }
        ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
        ZCG(cwd_key_len) = 0;
        ZCG(cwd_check) = true;
        return ZCG(cwd);
    }
}
 
void zend_accel_schedule_restart_if_necessary(zend_accel_restart_reason reason)
{
    if ((((double) ZSMMG(wasted_shared_memory)) / ZCG(accel_directives).memory_consumption) >= ZCG(accel_directives).max_wasted_percentage) {
        zend_accel_schedule_restart(reason);
    }
}
 
/* O+ tracks changes of "include_path" directive. It stores all the requested
 * values in ZCG(include_paths) shared hash table, current value in
 * ZCG(include_path)/ZCG(include_path_len) and one letter "path key" in
 * ZCG(include_path_key).
 */
static ZEND_INI_MH(accel_include_path_on_modify)
{
    int ret = orig_include_path_on_modify(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
 
    if (ret == SUCCESS) {
        ZCG(include_path) = new_value;
        ZCG(include_path_key_len) = 0;
        ZCG(include_path_check) = true;
    }
    return ret;
}
 
static inline void accel_restart_enter(void)
{
#ifdef ZEND_WIN32
    INCREMENT(restart_in);
#else
    struct flock restart_in_progress;
 
    restart_in_progress.l_type = F_WRLCK;
    restart_in_progress.l_whence = SEEK_SET;
    restart_in_progress.l_start = 2;
    restart_in_progress.l_len = 1;
 
    if (fcntl(lock_file, F_SETLK, &restart_in_progress) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(+1):  %s (%d)", strerror(errno), errno);
    }
#endif
    ZCSG(restart_in_progress) = true;
}
 
static inline void accel_restart_leave(void)
{
#ifdef ZEND_WIN32
    ZCSG(restart_in_progress) = false;
    DECREMENT(restart_in);
#else
    struct flock restart_finished;
 
    restart_finished.l_type = F_UNLCK;
    restart_finished.l_whence = SEEK_SET;
    restart_finished.l_start = 2;
    restart_finished.l_len = 1;
 
    ZCSG(restart_in_progress) = false;
    if (fcntl(lock_file, F_SETLK, &restart_finished) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(-1):  %s (%d)", strerror(errno), errno);
    }
#endif
}
 
static inline int accel_restart_is_active(void)
{
    if (ZCSG(restart_in_progress)) {
#ifndef ZEND_WIN32
        struct flock restart_check;
 
        restart_check.l_type = F_WRLCK;
        restart_check.l_whence = SEEK_SET;
        restart_check.l_start = 2;
        restart_check.l_len = 1;
 
        if (fcntl(lock_file, F_GETLK, &restart_check) == -1) {
            zend_accel_error(ACCEL_LOG_DEBUG, "RestartC:  %s (%d)", strerror(errno), errno);
            return FAILURE;
        }
        if (restart_check.l_type == F_UNLCK) {
            ZCSG(restart_in_progress) = false;
            return 0;
        } else {
            return 1;
        }
#else
        return LOCKVAL(restart_in) != 0;
#endif
    }
    return 0;
}
 
/* Creates a read lock for SHM access */
static inline zend_result accel_activate_add(void)
{
#ifdef ZEND_WIN32
    SHM_UNPROTECT();
    INCREMENT(mem_usage);
    SHM_PROTECT();
#else
    struct flock mem_usage_lock;
 
    mem_usage_lock.l_type = F_RDLCK;
    mem_usage_lock.l_whence = SEEK_SET;
    mem_usage_lock.l_start = 1;
    mem_usage_lock.l_len = 1;
 
    if (fcntl(lock_file, F_SETLK, &mem_usage_lock) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(+1):  %s (%d)", strerror(errno), errno);
        return FAILURE;
    }
#endif
    return SUCCESS;
}
 
/* Releases a lock for SHM access */
static inline void accel_deactivate_sub(void)
{
#ifdef ZEND_WIN32
    if (ZCG(counted)) {
        SHM_UNPROTECT();
        DECREMENT(mem_usage);
        ZCG(counted) = false;
        SHM_PROTECT();
    }
#else
    struct flock mem_usage_unlock;
 
    mem_usage_unlock.l_type = F_UNLCK;
    mem_usage_unlock.l_whence = SEEK_SET;
    mem_usage_unlock.l_start = 1;
    mem_usage_unlock.l_len = 1;
 
    if (fcntl(lock_file, F_SETLK, &mem_usage_unlock) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(-1):  %s (%d)", strerror(errno), errno);
    }
#endif
}
 
static inline void accel_unlock_all(void)
{
#ifdef ZEND_WIN32
    accel_deactivate_sub();
#else
    if (lock_file == -1) {
        return;
    }
 
    struct flock mem_usage_unlock_all;
 
    mem_usage_unlock_all.l_type = F_UNLCK;
    mem_usage_unlock_all.l_whence = SEEK_SET;
    mem_usage_unlock_all.l_start = 0;
    mem_usage_unlock_all.l_len = 0;
 
    if (fcntl(lock_file, F_SETLK, &mem_usage_unlock_all) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "UnlockAll:  %s (%d)", strerror(errno), errno);
    }
#endif
}
 
/* Interned strings support */
 
/* O+ disables creation of interned strings by regular PHP compiler, instead,
 * it creates interned strings in shared memory when saves a script.
 * Such interned strings are shared across all PHP processes
 */
 
#define STRTAB_INVALID_POS 0
 
#define STRTAB_HASH_TO_SLOT(tab, h) \
    ((zend_string_table_pos_t*)((char*)(tab) + sizeof(*(tab)) + ((h) & (tab)->nTableMask)))
#define STRTAB_STR_TO_POS(tab, s) \
    ((zend_string_table_pos_t)(((char*)s - (char*)(tab)) / ZEND_STRING_TABLE_POS_ALIGNMENT))
#define STRTAB_POS_TO_STR(tab, pos) \
    ((zend_string*)((char*)(tab) + ((uintptr_t)(pos) * ZEND_STRING_TABLE_POS_ALIGNMENT)))
#define STRTAB_COLLISION(s) \
    (*((zend_string_table_pos_t*)((char*)s - sizeof(zend_string_table_pos_t))))
#define STRTAB_STR_SIZE(s) \
    ZEND_MM_ALIGNED_SIZE_EX(_ZSTR_STRUCT_SIZE(ZSTR_LEN(s)) + sizeof(zend_string_table_pos_t), ZEND_STRING_TABLE_POS_ALIGNMENT)
#define STRTAB_NEXT(s) \
    ((zend_string*)((char*)(s) + STRTAB_STR_SIZE(s)))
 
static void accel_interned_strings_restore_state(void)
{
    zend_string *s, *top;
    zend_string_table_pos_t *hash_slot, n;
 
    /* clear removed content */
    memset(ZCSG(interned_strings).saved_top,
            0, (char*)ZCSG(interned_strings).top - (char*)ZCSG(interned_strings).saved_top);
 
    /* Reset "top" */
    ZCSG(interned_strings).top = ZCSG(interned_strings).saved_top;
 
    /* rehash */
    memset((char*)&ZCSG(interned_strings) + sizeof(zend_string_table),
        STRTAB_INVALID_POS,
        (char*)ZCSG(interned_strings).start -
            ((char*)&ZCSG(interned_strings) + sizeof(zend_string_table)));
    s = ZCSG(interned_strings).start;
    top = ZCSG(interned_strings).top;
    n = 0;
    if (EXPECTED(s < top)) {
        do {
            if (ZSTR_HAS_CE_CACHE(s)) {
                /* Discard non-global CE_CACHE slots on reset. */
                uintptr_t idx = (GC_REFCOUNT(s) - 1) / sizeof(void *);
                if (idx >= ZCSG(map_ptr_last)) {
                    GC_SET_REFCOUNT(s, 2);
                    GC_DEL_FLAGS(s, IS_STR_CLASS_NAME_MAP_PTR);
                }
            }
 
            hash_slot = STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), ZSTR_H(s));
            STRTAB_COLLISION(s) = *hash_slot;
            *hash_slot = STRTAB_STR_TO_POS(&ZCSG(interned_strings), s);
            s = STRTAB_NEXT(s);
            n++;
        } while (s < top);
    }
    ZCSG(interned_strings).nNumOfElements = n;
}
 
static void accel_interned_strings_save_state(void)
{
    ZCSG(interned_strings).saved_top = ZCSG(interned_strings).top;
}
 
static zend_always_inline zend_string *accel_find_interned_string(zend_string *str)
{
    zend_ulong   h;
    zend_string_table_pos_t pos;
    zend_string *s;
 
    if (IS_ACCEL_INTERNED(str)) {
        /* this is already an interned string */
        return str;
    }
 
    if (!ZCG(counted)) {
        if (!ZCG(accelerator_enabled) || accel_activate_add() == FAILURE) {
            return NULL;
        }
        ZCG(counted) = true;
    }
 
    h = zend_string_hash_val(str);
 
    /* check for existing interned string */
    pos = *STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), h);
    if (EXPECTED(pos != STRTAB_INVALID_POS)) {
        do {
            s = STRTAB_POS_TO_STR(&ZCSG(interned_strings), pos);
            if (EXPECTED(ZSTR_H(s) == h) && zend_string_equal_content(s, str)) {
                return s;
            }
            pos = STRTAB_COLLISION(s);
        } while (pos != STRTAB_INVALID_POS);
    }
 
    return NULL;
}
 
zend_string* ZEND_FASTCALL accel_new_interned_string(zend_string *str)
{
    zend_ulong   h;
    zend_string_table_pos_t pos, *hash_slot;
    zend_string *s;
 
    if (UNEXPECTED(file_cache_only)) {
        return str;
    }
 
    if (IS_ACCEL_INTERNED(str)) {
        /* this is already an interned string */
        return str;
    }
 
    h = zend_string_hash_val(str);
 
    /* check for existing interned string */
    hash_slot = STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), h);
    pos = *hash_slot;
    if (EXPECTED(pos != STRTAB_INVALID_POS)) {
        do {
            s = STRTAB_POS_TO_STR(&ZCSG(interned_strings), pos);
            if (EXPECTED(ZSTR_H(s) == h) && zend_string_equal_content(s, str)) {
                goto finish;
            }
            pos = STRTAB_COLLISION(s);
        } while (pos != STRTAB_INVALID_POS);
    }
 
    if (UNEXPECTED((char*)ZCSG(interned_strings).end - (char*)ZCSG(interned_strings).top < STRTAB_STR_SIZE(str))) {
        /* no memory, return the same non-interned string */
        zend_accel_error(ACCEL_LOG_WARNING, "Interned string buffer overflow");
        return str;
    }
 
    /* create new interning string in shared interned strings buffer */
    ZCSG(interned_strings).nNumOfElements++;
    s = ZCSG(interned_strings).top;
    hash_slot = STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), h);
    STRTAB_COLLISION(s) = *hash_slot;
    *hash_slot = STRTAB_STR_TO_POS(&ZCSG(interned_strings), s);
    GC_SET_REFCOUNT(s, 2);
    GC_TYPE_INFO(s) = GC_STRING | ((IS_STR_INTERNED | IS_STR_PERMANENT) << GC_FLAGS_SHIFT)| (ZSTR_IS_VALID_UTF8(str) ? IS_STR_VALID_UTF8 : 0);
    ZSTR_H(s) = h;
    ZSTR_LEN(s) = ZSTR_LEN(str);
    memcpy(ZSTR_VAL(s), ZSTR_VAL(str), ZSTR_LEN(s) + 1);
    ZCSG(interned_strings).top = STRTAB_NEXT(s);
 
finish:
    /* Transfer CE_CACHE map ptr slot to new interned string.
     * Should only happen for permanent interned strings with permanent map_ptr slot. */
    if (ZSTR_HAS_CE_CACHE(str) && !ZSTR_HAS_CE_CACHE(s)) {
        ZEND_ASSERT(GC_FLAGS(str) & IS_STR_PERMANENT);
        GC_SET_REFCOUNT(s, GC_REFCOUNT(str));
        GC_ADD_FLAGS(s, IS_STR_CLASS_NAME_MAP_PTR);
    }
 
    zend_string_release(str);
    return s;
}
 
static zend_string* ZEND_FASTCALL accel_new_interned_string_for_php(zend_string *str)
{
    zend_string_hash_val(str);
    if (ZCG(counted)) {
        zend_string *ret = accel_find_interned_string(str);
 
        if (ret) {
            zend_string_release(str);
            return ret;
        }
    }
    return str;
}
 
static zend_always_inline zend_string *accel_find_interned_string_ex(zend_ulong h, const char *str, size_t size)
{
    zend_string_table_pos_t pos;
    zend_string *s;
 
    /* check for existing interned string */
    pos = *STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), h);
    if (EXPECTED(pos != STRTAB_INVALID_POS)) {
        do {
            s = STRTAB_POS_TO_STR(&ZCSG(interned_strings), pos);
            if (EXPECTED(ZSTR_H(s) == h) && zend_string_equals_cstr(s, str, size)) {
                return s;
            }
            pos = STRTAB_COLLISION(s);
        } while (pos != STRTAB_INVALID_POS);
    }
    return NULL;
}
 
static zend_string* ZEND_FASTCALL accel_init_interned_string_for_php(const char *str, size_t size, bool permanent)
{
    if (ZCG(counted)) {
        zend_ulong h = zend_inline_hash_func(str, size);
        zend_string *ret = accel_find_interned_string_ex(h, str, size);
 
        if (!ret) {
            ret = zend_string_init(str, size, permanent);
            ZSTR_H(ret) = h;
        }
 
        return ret;
    }
 
    return zend_string_init(str, size, permanent);
}
 
static inline void accel_copy_permanent_list_types(
    zend_new_interned_string_func_t new_interned_string, zend_type type)
{
    zend_type *single_type;
    ZEND_TYPE_FOREACH(type, single_type) {
        if (ZEND_TYPE_HAS_LIST(*single_type)) {
            ZEND_ASSERT(ZEND_TYPE_IS_INTERSECTION(*single_type));
            accel_copy_permanent_list_types(new_interned_string, *single_type);
        }
        if (ZEND_TYPE_HAS_NAME(*single_type)) {
            ZEND_TYPE_SET_PTR(*single_type, new_interned_string(ZEND_TYPE_NAME(*single_type)));
        }
    } ZEND_TYPE_FOREACH_END();
}
 
/* Copy PHP interned strings from PHP process memory into the shared memory */
static void accel_copy_permanent_strings(zend_new_interned_string_func_t new_interned_string)
{
    uint32_t j;
    Bucket *p, *q;
    HashTable *ht;
 
    /* empty string */
    zend_empty_string = new_interned_string(zend_empty_string);
    for (j = 0; j < 256; j++) {
        zend_one_char_string[j] = new_interned_string(ZSTR_CHAR(j));
    }
    for (j = 0; j < ZEND_STR_LAST_KNOWN; j++) {
        zend_known_strings[j] = new_interned_string(zend_known_strings[j]);
    }
 
    /* function table hash keys */
    ZEND_HASH_MAP_FOREACH_BUCKET(CG(function_table), p) {
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
        if (Z_FUNC(p->val)->common.function_name) {
            Z_FUNC(p->val)->common.function_name = new_interned_string(Z_FUNC(p->val)->common.function_name);
        }
        if (Z_FUNC(p->val)->common.arg_info &&
            (Z_FUNC(p->val)->common.fn_flags & (ZEND_ACC_HAS_RETURN_TYPE|ZEND_ACC_HAS_TYPE_HINTS))) {
            uint32_t i;
            uint32_t num_args = Z_FUNC(p->val)->common.num_args + 1;
            zend_arg_info *arg_info = Z_FUNC(p->val)->common.arg_info - 1;
 
            if (Z_FUNC(p->val)->common.fn_flags & ZEND_ACC_VARIADIC) {
                num_args++;
            }
            for (i = 0 ; i < num_args; i++) {
                accel_copy_permanent_list_types(new_interned_string, arg_info[i].type);
            }
        }
    } ZEND_HASH_FOREACH_END();
 
    /* class table hash keys, class names, properties, methods, constants, etc */
    ZEND_HASH_MAP_FOREACH_BUCKET(CG(class_table), p) {
        zend_class_entry *ce;
 
        ce = (zend_class_entry*)Z_PTR(p->val);
 
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
 
        if (ce->name) {
            ce->name = new_interned_string(ce->name);
            ZEND_ASSERT(ZSTR_HAS_CE_CACHE(ce->name));
        }
 
        ZEND_HASH_MAP_FOREACH_BUCKET(&ce->properties_info, q) {
            zend_property_info *info;
 
            info = (zend_property_info*)Z_PTR(q->val);
 
            if (q->key) {
                q->key = new_interned_string(q->key);
            }
 
            if (info->name) {
                info->name = new_interned_string(info->name);
            }
        } ZEND_HASH_FOREACH_END();
 
        ZEND_HASH_MAP_FOREACH_BUCKET(&ce->function_table, q) {
            if (q->key) {
                q->key = new_interned_string(q->key);
            }
            if (Z_FUNC(q->val)->common.function_name) {
                Z_FUNC(q->val)->common.function_name = new_interned_string(Z_FUNC(q->val)->common.function_name);
            }
        } ZEND_HASH_FOREACH_END();
 
        ZEND_HASH_MAP_FOREACH_BUCKET(&ce->constants_table, q) {
            zend_class_constant* c;
 
            if (q->key) {
                q->key = new_interned_string(q->key);
            }
            c = (zend_class_constant*)Z_PTR(q->val);
            if (Z_TYPE(c->value) == IS_STRING) {
                ZVAL_STR(&c->value, new_interned_string(Z_STR(c->value)));
            }
        } ZEND_HASH_FOREACH_END();
    } ZEND_HASH_FOREACH_END();
 
    /* constant hash keys */
    ZEND_HASH_MAP_FOREACH_BUCKET(EG(zend_constants), p) {
        zend_constant *c;
 
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
        c = (zend_constant*)Z_PTR(p->val);
        if (c->name) {
            c->name = new_interned_string(c->name);
        }
        if (Z_TYPE(c->value) == IS_STRING) {
            ZVAL_STR(&c->value, new_interned_string(Z_STR(c->value)));
        }
    } ZEND_HASH_FOREACH_END();
 
    /* auto globals hash keys and names */
    ZEND_HASH_MAP_FOREACH_BUCKET(CG(auto_globals), p) {
        zend_auto_global *auto_global;
 
        auto_global = (zend_auto_global*)Z_PTR(p->val);
 
        zend_string_addref(auto_global->name);
        auto_global->name = new_interned_string(auto_global->name);
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
    } ZEND_HASH_FOREACH_END();
 
    ZEND_HASH_MAP_FOREACH_BUCKET(&module_registry, p) {
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
    } ZEND_HASH_FOREACH_END();
 
    ZEND_HASH_MAP_FOREACH_BUCKET(EG(ini_directives), p) {
        zend_ini_entry *entry = (zend_ini_entry*)Z_PTR(p->val);
 
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
        if (entry->name) {
            entry->name = new_interned_string(entry->name);
        }
        if (entry->value) {
            entry->value = new_interned_string(entry->value);
        }
        if (entry->orig_value) {
            entry->orig_value = new_interned_string(entry->orig_value);
        }
    } ZEND_HASH_FOREACH_END();
 
    ht = php_get_stream_filters_hash_global();
    ZEND_HASH_MAP_FOREACH_BUCKET(ht, p) {
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
    } ZEND_HASH_FOREACH_END();
 
    ht = php_stream_get_url_stream_wrappers_hash_global();
    ZEND_HASH_MAP_FOREACH_BUCKET(ht, p) {
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
    } ZEND_HASH_FOREACH_END();
 
    ht = php_stream_xport_get_hash();
    ZEND_HASH_MAP_FOREACH_BUCKET(ht, p) {
        if (p->key) {
            p->key = new_interned_string(p->key);
        }
    } ZEND_HASH_FOREACH_END();
}
 
static zend_string* ZEND_FASTCALL accel_replace_string_by_shm_permanent(zend_string *str)
{
    zend_string *ret = accel_find_interned_string(str);
 
    if (ret) {
        zend_string_release(str);
        return ret;
    }
    return str;
}
 
static void accel_use_shm_interned_strings(void)
{
    HANDLE_BLOCK_INTERRUPTIONS();
    SHM_UNPROTECT();
    zend_shared_alloc_lock();
 
    if (ZCSG(interned_strings).saved_top == NULL) {
        accel_copy_permanent_strings(accel_new_interned_string);
    } else {
        ZCG(counted) = true;
        accel_copy_permanent_strings(accel_replace_string_by_shm_permanent);
        ZCG(counted) = false;
    }
    accel_interned_strings_save_state();
 
    zend_shared_alloc_unlock();
    SHM_PROTECT();
    HANDLE_UNBLOCK_INTERRUPTIONS();
}
 
#ifndef ZEND_WIN32
static inline void kill_all_lockers(struct flock *mem_usage_check)
{
    int tries;
    /* so that other process won't try to force while we are busy cleaning up */
    ZCSG(force_restart_time) = 0;
    while (mem_usage_check->l_pid > 0) {
        /* Try SIGTERM first, switch to SIGKILL if not successful. */
        int signal = SIGTERM;
        errno = 0;
        bool success = false;
        tries = 10;
 
        while (tries--) {
            zend_accel_error(ACCEL_LOG_WARNING, "Attempting to kill locker %d", mem_usage_check->l_pid);
            if (kill(mem_usage_check->l_pid, signal)) {
                if (errno == ESRCH) {
                    /* Process died before the signal was sent */
                    success = true;
                    zend_accel_error(ACCEL_LOG_WARNING, "Process %d died before SIGKILL was sent", mem_usage_check->l_pid);
                } else if (errno != 0) {
                    zend_accel_error(ACCEL_LOG_WARNING, "Failed to send SIGKILL to locker %d: %s", mem_usage_check->l_pid, strerror(errno));
                }
                break;
            }
            /* give it a chance to die */
            usleep(20000);
            if (kill(mem_usage_check->l_pid, 0)) {
                if (errno == ESRCH) {
                    /* successfully killed locker, process no longer exists  */
                    success = true;
                    zend_accel_error(ACCEL_LOG_WARNING, "Killed locker %d", mem_usage_check->l_pid);
                } else if (errno != 0) {
                    zend_accel_error(ACCEL_LOG_WARNING, "Failed to check locker %d: %s", mem_usage_check->l_pid, strerror(errno));
                }
                break;
            }
            usleep(10000);
            /* If SIGTERM was not sufficient, use SIGKILL. */
            signal = SIGKILL;
        }
        if (!success) {
            /* errno is not ESRCH or we ran out of tries to kill the locker */
            ZCSG(force_restart_time) = time(NULL); /* restore forced restart request */
            /* cannot kill the locker, bail out with error */
            zend_accel_error_noreturn(ACCEL_LOG_ERROR, "Cannot kill process %d!", mem_usage_check->l_pid);
        }
 
        mem_usage_check->l_type = F_WRLCK;
        mem_usage_check->l_whence = SEEK_SET;
        mem_usage_check->l_start = 1;
        mem_usage_check->l_len = 1;
        mem_usage_check->l_pid = -1;
        if (fcntl(lock_file, F_GETLK, mem_usage_check) == -1) {
            zend_accel_error(ACCEL_LOG_DEBUG, "KLockers:  %s (%d)", strerror(errno), errno);
            break;
        }
 
        if (mem_usage_check->l_type == F_UNLCK || mem_usage_check->l_pid <= 0) {
            break;
        }
    }
}
#endif
 
static inline bool accel_is_inactive(void)
{
#ifdef ZEND_WIN32
    /* on Windows, we don't need kill_all_lockers() because SAPIs
       that work on Windows don't manage child processes (and we
       can't do anything about hanging threads anyway); therefore
       on Windows, we can simply manage this counter with atomics
       instead of flocks (atomics are much faster but they don't
       provide us with the PID of locker processes) */
 
    if (LOCKVAL(mem_usage) == 0) {
        return true;
    }
#else
    struct flock mem_usage_check;
 
    mem_usage_check.l_type = F_WRLCK;
    mem_usage_check.l_whence = SEEK_SET;
    mem_usage_check.l_start = 1;
    mem_usage_check.l_len = 1;
    mem_usage_check.l_pid = -1;
    if (fcntl(lock_file, F_GETLK, &mem_usage_check) == -1) {
        zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC:  %s (%d)", strerror(errno), errno);
        return false;
    }
    if (mem_usage_check.l_type == F_UNLCK) {
        return true;
    }
 
    if (ZCG(accel_directives).force_restart_timeout
        && ZCSG(force_restart_time)
        && time(NULL) >= ZCSG(force_restart_time)) {
        zend_accel_error(ACCEL_LOG_WARNING, "Forced restart at %ld (after " ZEND_LONG_FMT " seconds), locked by %d", (long)time(NULL), ZCG(accel_directives).force_restart_timeout, mem_usage_check.l_pid);
        kill_all_lockers(&mem_usage_check);
 
        return false; /* next request should be able to restart it */
    }
#endif
 
    return false;
}
 
static int zend_get_stream_timestamp(const char *filename, zend_stat_t *statbuf)
{
    php_stream_wrapper *wrapper;
    php_stream_statbuf stream_statbuf;
    int ret, er;
 
    if (!filename) {
        return FAILURE;
    }
 
    wrapper = php_stream_locate_url_wrapper(filename, NULL, STREAM_LOCATE_WRAPPERS_ONLY);
    if (!wrapper) {
        return FAILURE;
    }
    if (!wrapper->wops || !wrapper->wops->url_stat) {
        statbuf->st_mtime = 1;
        return SUCCESS; /* anything other than 0 is considered to be a valid timestamp */
    }
 
    er = EG(error_reporting);
    EG(error_reporting) = 0;
    zend_try {
        ret = wrapper->wops->url_stat(wrapper, (char*)filename, PHP_STREAM_URL_STAT_QUIET, &stream_statbuf, NULL);
    } zend_catch {
        ret = -1;
    } zend_end_try();
    EG(error_reporting) = er;
 
    if (ret != 0) {
        return FAILURE;
    }
 
    *statbuf = stream_statbuf.sb;
    return SUCCESS;
}
 
#ifdef ZEND_WIN32
static accel_time_t zend_get_file_handle_timestamp_win(zend_file_handle *file_handle, size_t *size)
{
    static unsigned __int64 utc_base = 0;
    static FILETIME utc_base_ft;
    WIN32_FILE_ATTRIBUTE_DATA fdata;
 
    if (!file_handle->opened_path) {
        return 0;
    }
 
    if (!utc_base) {
        SYSTEMTIME st;
 
        st.wYear = 1970;
        st.wMonth = 1;
        st.wDay = 1;
        st.wHour = 0;
        st.wMinute = 0;
        st.wSecond = 0;
        st.wMilliseconds = 0;
 
        SystemTimeToFileTime (&st, &utc_base_ft);
        utc_base = (((unsigned __int64)utc_base_ft.dwHighDateTime) << 32) + utc_base_ft.dwLowDateTime;
    }
 
    if (file_handle->opened_path && GetFileAttributesEx(file_handle->opened_path->val, GetFileExInfoStandard, &fdata) != 0) {
        unsigned __int64 ftime;
 
        if (CompareFileTime (&fdata.ftLastWriteTime, &utc_base_ft) < 0) {
            return 0;
        }
 
        ftime = (((unsigned __int64)fdata.ftLastWriteTime.dwHighDateTime) << 32) + fdata.ftLastWriteTime.dwLowDateTime - utc_base;
        ftime /= 10000000L;
 
        if (size) {
            *size = (size_t)((((unsigned __int64)fdata.nFileSizeHigh) << 32) + (unsigned __int64)fdata.nFileSizeLow);
        }
        return (accel_time_t)ftime;
    }
    return 0;
}
#endif
 
accel_time_t zend_get_file_handle_timestamp(zend_file_handle *file_handle, size_t *size)
{
    zend_stat_t statbuf = {0};
#ifdef ZEND_WIN32
    accel_time_t res;
#endif
 
    if (sapi_module.get_stat &&
        !EG(current_execute_data) &&
        file_handle->primary_script) {
 
        zend_stat_t *tmpbuf = sapi_module.get_stat();
 
        if (tmpbuf) {
            if (size) {
                *size = tmpbuf->st_size;
            }
            return tmpbuf->st_mtime;
        }
    }
 
#ifdef ZEND_WIN32
    res = zend_get_file_handle_timestamp_win(file_handle, size);
    if (res) {
        return res;
    }
#endif
 
    switch (file_handle->type) {
        case ZEND_HANDLE_FP:
            if (zend_fstat(fileno(file_handle->handle.fp), &statbuf) == -1) {
                if (zend_get_stream_timestamp(ZSTR_VAL(file_handle->filename), &statbuf) != SUCCESS) {
                    return 0;
                }
            }
            break;
        case ZEND_HANDLE_FILENAME:
            if (file_handle->opened_path) {
                char *file_path = ZSTR_VAL(file_handle->opened_path);
 
                if (php_is_stream_path(file_path)) {
                    if (zend_get_stream_timestamp(file_path, &statbuf) == SUCCESS) {
                        break;
                    }
                }
                if (VCWD_STAT(file_path, &statbuf) != -1) {
                    break;
                }
            }
 
            if (zend_get_stream_timestamp(ZSTR_VAL(file_handle->filename), &statbuf) != SUCCESS) {
                return 0;
            }
            break;
        case ZEND_HANDLE_STREAM:
            {
                php_stream *stream = (php_stream *)file_handle->handle.stream.handle;
                php_stream_statbuf sb;
                int ret, er;
 
                if (!stream ||
                    !stream->ops ||
                    !stream->ops->stat) {
                    return 0;
                }
 
                er = EG(error_reporting);
                EG(error_reporting) = 0;
                zend_try {
                    ret = stream->ops->stat(stream, &sb);
                } zend_catch {
                    ret = -1;
                } zend_end_try();
                EG(error_reporting) = er;
                if (ret != 0) {
                    return 0;
                }
 
                statbuf = sb.sb;
            }
            break;
 
        default:
            return 0;
    }
 
    if (size) {
        *size = statbuf.st_size;
    }
    return statbuf.st_mtime;
}
 
static inline int do_validate_timestamps(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
{
    zend_file_handle ps_handle;
    zend_string *full_path_ptr = NULL;
    int ret;

    if (file_handle->opened_path) {
        if (persistent_script->script.filename != file_handle->opened_path &&
            !zend_string_equal_content(persistent_script->script.filename, file_handle->opened_path)) {
            return FAILURE;
        }
    } else {
        full_path_ptr = accelerator_orig_zend_resolve_path(file_handle->filename);
        if (full_path_ptr &&
            persistent_script->script.filename != full_path_ptr &&
            !zend_string_equal_content(persistent_script->script.filename, full_path_ptr)) {
            zend_string_release_ex(full_path_ptr, 0);
            return FAILURE;
        }
        file_handle->opened_path = full_path_ptr;
    }
 
    if (persistent_script->timestamp == 0) {
        if (full_path_ptr) {
            zend_string_release_ex(full_path_ptr, 0);
            file_handle->opened_path = NULL;
        }
        return FAILURE;
    }
 
    if (zend_get_file_handle_timestamp(file_handle, NULL) == persistent_script->timestamp) {
        if (full_path_ptr) {
            zend_string_release_ex(full_path_ptr, 0);
            file_handle->opened_path = NULL;
        }
        return SUCCESS;
    }
    if (full_path_ptr) {
        zend_string_release_ex(full_path_ptr, 0);
        file_handle->opened_path = NULL;
    }
 
    zend_stream_init_filename_ex(&ps_handle, persistent_script->script.filename);
    ps_handle.opened_path = persistent_script->script.filename;
 
    ret = zend_get_file_handle_timestamp(&ps_handle, NULL) == persistent_script->timestamp
        ? SUCCESS : FAILURE;
 
    zend_destroy_file_handle(&ps_handle);
 
    return ret;
}
 
zend_result validate_timestamp_and_record(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
{
    if (persistent_script->timestamp == 0) {
        return SUCCESS; /* Don't check timestamps of preloaded scripts */
    } else if (ZCG(accel_directives).revalidate_freq &&
        persistent_script->dynamic_members.revalidate >= ZCG(request_time)) {
        return SUCCESS;
    } else if (do_validate_timestamps(persistent_script, file_handle) == FAILURE) {
        return FAILURE;
    } else {
        persistent_script->dynamic_members.revalidate = ZCG(request_time) + ZCG(accel_directives).revalidate_freq;
        return SUCCESS;
    }
}
 
zend_result validate_timestamp_and_record_ex(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
{
    SHM_UNPROTECT();
    const zend_result ret = validate_timestamp_and_record(persistent_script, file_handle);
    SHM_PROTECT();
 
    return ret;
}
 
/* Instead of resolving full real path name each time we need to identify file,
 * we create a key that consist from requested file name, current working
 * directory, current include_path, etc */
zend_string *accel_make_persistent_key(zend_string *str)
{
    const char *path = ZSTR_VAL(str);
    size_t path_length = ZSTR_LEN(str);
    char *key;
    int key_length;
 
    ZEND_ASSERT(GC_REFCOUNT(ZCG(key)) == 1);
    ZSTR_LEN(ZCG(key)) = 0;
 
    /* CWD and include_path don't matter for absolute file names and streams */
    if (IS_ABSOLUTE_PATH(path, path_length)) {
        /* pass */
    } else if (UNEXPECTED(php_is_stream_path(path))) {
        if (!is_cacheable_stream_path(path)) {
            return NULL;
        }
        /* pass */
    } else if (UNEXPECTED(!ZCG(accel_directives).use_cwd)) {
        /* pass */
    } else {
        const char *include_path = NULL, *cwd = NULL;
        int include_path_len = 0, cwd_len = 0;
        zend_string *parent_script = NULL;
        size_t parent_script_len = 0;
 
        if (EXPECTED(ZCG(cwd_key_len))) {
            cwd = ZCG(cwd_key);
            cwd_len = ZCG(cwd_key_len);
        } else {
            zend_string *cwd_str = accel_getcwd();
 
            if (UNEXPECTED(!cwd_str)) {
                /* we don't handle this well for now. */
                zend_accel_error(ACCEL_LOG_INFO, "getcwd() failed for '%s' (%d), please try to set opcache.use_cwd to 0 in ini file", path, errno);
                return NULL;
            }
            cwd = ZSTR_VAL(cwd_str);
            cwd_len = ZSTR_LEN(cwd_str);
            if (ZCG(cwd_check)) {
                ZCG(cwd_check) = false;
                if (ZCG(accelerator_enabled)) {
 
                    zend_string *str = accel_find_interned_string(cwd_str);
                    if (!str) {
                        HANDLE_BLOCK_INTERRUPTIONS();
                        SHM_UNPROTECT();
                        zend_shared_alloc_lock();
                        str = accel_new_interned_string(zend_string_copy(cwd_str));
                        if (str == cwd_str) {
                            zend_string_release_ex(str, 0);
                            str = NULL;
                        }
                        zend_shared_alloc_unlock();
                        SHM_PROTECT();
                        HANDLE_UNBLOCK_INTERRUPTIONS();
                    }
                    if (str) {
                        char buf[32];
                        char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, STRTAB_STR_TO_POS(&ZCSG(interned_strings), str));
 
                        cwd_len = ZCG(cwd_key_len) = buf + sizeof(buf) - 1 - res;
                        cwd = ZCG(cwd_key);
                        memcpy(ZCG(cwd_key), res, cwd_len + 1);
                    } else {
                        return NULL;
                    }
                } else {
                    return NULL;
                }
            }
        }
 
        if (EXPECTED(ZCG(include_path_key_len))) {
            include_path = ZCG(include_path_key);
            include_path_len = ZCG(include_path_key_len);
        } else if (!ZCG(include_path) || ZSTR_LEN(ZCG(include_path)) == 0) {
            include_path = "";
            include_path_len = 0;
        } else {
            include_path = ZSTR_VAL(ZCG(include_path));
            include_path_len = ZSTR_LEN(ZCG(include_path));
 
            if (ZCG(include_path_check)) {
                ZCG(include_path_check) = false;
                if (ZCG(accelerator_enabled)) {
 
                    zend_string *str = accel_find_interned_string(ZCG(include_path));
                    if (!str) {
                        HANDLE_BLOCK_INTERRUPTIONS();
                        SHM_UNPROTECT();
                        zend_shared_alloc_lock();
                        str = accel_new_interned_string(zend_string_copy(ZCG(include_path)));
                        if (str == ZCG(include_path)) {
                            zend_string_release(str);
                            str = NULL;
                        }
                        zend_shared_alloc_unlock();
                        SHM_PROTECT();
                        HANDLE_UNBLOCK_INTERRUPTIONS();
                    }
                    if (str) {
                        char buf[32];
                        char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, STRTAB_STR_TO_POS(&ZCSG(interned_strings), str));
 
                        include_path_len = ZCG(include_path_key_len) = buf + sizeof(buf) - 1 - res;
                        include_path = ZCG(include_path_key);
                        memcpy(ZCG(include_path_key), res, include_path_len + 1);
                    } else {
                        return NULL;
                    }
                } else {
                    return NULL;
                }
            }
        }
 
        /* Calculate key length */
        if (UNEXPECTED((size_t)(cwd_len + path_length + include_path_len + 2) >= ZCG_KEY_LEN)) {
            return NULL;
        }
 
        /* Generate key
         * Note - the include_path must be the last element in the key,
         * since in itself, it may include colons (which we use to separate
         * different components of the key)
         */
        key = ZSTR_VAL(ZCG(key));
        memcpy(key, path, path_length);
        key[path_length] = ':';
        key_length = path_length + 1;
        memcpy(key + key_length, cwd, cwd_len);
        key_length += cwd_len;
 
        if (include_path_len) {
            key[key_length] = ':';
            key_length += 1;
            memcpy(key + key_length, include_path, include_path_len);
            key_length += include_path_len;
        }
 
        /* Here we add to the key the parent script directory,
         * since fopen_wrappers from version 4.0.7 use current script's path
         * in include path too.
         */
        if (EXPECTED(EG(current_execute_data)) &&
            EXPECTED((parent_script = zend_get_executed_filename_ex()) != NULL)) {
 
            parent_script_len = ZSTR_LEN(parent_script);
            while (parent_script_len > 0) {
                --parent_script_len;
                if (IS_SLASH(ZSTR_VAL(parent_script)[parent_script_len])) {
                    break;
                }
            }
 
            if (UNEXPECTED((size_t)(key_length + parent_script_len + 1) >= ZCG_KEY_LEN)) {
                return NULL;
            }
            key[key_length] = ':';
            key_length += 1;
            memcpy(key + key_length, ZSTR_VAL(parent_script), parent_script_len);
            key_length += parent_script_len;
        }
        key[key_length] = '\0';
        ZSTR_H(ZCG(key)) = 0;
        ZSTR_LEN(ZCG(key)) = key_length;
        return ZCG(key);
    }
 
    /* not use_cwd */
    return str;
}

static void zend_accel_discard_script(zend_persistent_script *persistent_script)
{
    if (persistent_script->corrupted) {
        /* already discarded */
        return;
    }
 
    persistent_script->corrupted = true;
    persistent_script->timestamp = 0;
    ZSMMG(wasted_shared_memory) += persistent_script->dynamic_members.memory_consumption;
    if (ZSMMG(memory_exhausted)) {
        zend_accel_restart_reason reason =
            zend_accel_hash_is_full(&ZCSG(hash)) ? ACCEL_RESTART_HASH : ACCEL_RESTART_OOM;
        zend_accel_schedule_restart_if_necessary(reason);
    }
}

static void zend_accel_lock_discard_script(zend_persistent_script *persistent_script)
{
    zend_shared_alloc_lock();
    zend_accel_discard_script(persistent_script);
    zend_shared_alloc_unlock();
}
 
zend_result zend_accel_invalidate(zend_string *filename, bool force)
{
    zend_string *realpath;
    zend_persistent_script *persistent_script;
    zend_bool file_found = true;
 
    if (!ZCG(accelerator_enabled) || accelerator_shm_read_lock() != SUCCESS) {
        return FAILURE;
    }
 
    realpath = accelerator_orig_zend_resolve_path(filename);
 
    if (!realpath) {
        //file could have been deleted, but we still need to invalidate it.
        //so instead of failing, just use the provided filename for the lookup
        realpath = zend_string_copy(filename);
        file_found = false;
    }
 
    if (ZCG(accel_directives).file_cache) {
        zend_file_cache_invalidate(realpath);
    }
 
    persistent_script = zend_accel_hash_find(&ZCSG(hash), realpath);
    if (persistent_script && !persistent_script->corrupted) {
        zend_file_handle file_handle;
        zend_stream_init_filename_ex(&file_handle, realpath);
        file_handle.opened_path = realpath;
 
        if (force ||
            !ZCG(accel_directives).validate_timestamps ||
            do_validate_timestamps(persistent_script, &file_handle) == FAILURE) {
            HANDLE_BLOCK_INTERRUPTIONS();
            SHM_UNPROTECT();
            zend_accel_lock_discard_script(persistent_script);
            SHM_PROTECT();
            HANDLE_UNBLOCK_INTERRUPTIONS();
        }
 
        file_handle.opened_path = NULL;
        zend_destroy_file_handle(&file_handle);
        file_found = true;
    }
 
    accelerator_shm_read_unlock();
    zend_string_release_ex(realpath, 0);
 
    return file_found ? SUCCESS : FAILURE;
}
 
static zend_string* accel_new_interned_key(zend_string *key)
{
    zend_string *new_key;
 
    if (zend_accel_in_shm(key)) {
        return key;
    }
    GC_ADDREF(key);
    new_key = accel_new_interned_string(key);
    if (UNEXPECTED(new_key == key)) {
        GC_DELREF(key);
        new_key = zend_shared_alloc(ZEND_MM_ALIGNED_SIZE_EX(_ZSTR_STRUCT_SIZE(ZSTR_LEN(key)), 8));
        if (EXPECTED(new_key)) {
            GC_SET_REFCOUNT(new_key, 2);
            GC_TYPE_INFO(new_key) = GC_STRING | (IS_STR_INTERNED << GC_FLAGS_SHIFT);
            ZSTR_H(new_key) = ZSTR_H(key);
            ZSTR_LEN(new_key) = ZSTR_LEN(key);
            memcpy(ZSTR_VAL(new_key), ZSTR_VAL(key), ZSTR_LEN(new_key) + 1);
        }
    }
    return new_key;
}
 
/* Adds another key for existing cached script */
static void zend_accel_add_key(zend_string *key, zend_accel_hash_entry *bucket)
{
    if (!zend_accel_hash_find(&ZCSG(hash), key)) {
        if (zend_accel_hash_is_full(&ZCSG(hash))) {
            zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
            ZSMMG(memory_exhausted) = true;
            zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
        } else {
            zend_string *new_key = accel_new_interned_key(key);
            if (new_key) {
                if (zend_accel_hash_update(&ZCSG(hash), new_key, 1, bucket)) {
                    zend_accel_error(ACCEL_LOG_INFO, "Added key '%s'", ZSTR_VAL(new_key));
                }
            } else {
                zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
            }
        }
    }
}
 
static zend_always_inline bool is_phar_file(zend_string *filename)
{
    return filename && ZSTR_LEN(filename) >= sizeof(".phar") &&
        !memcmp(ZSTR_VAL(filename) + ZSTR_LEN(filename) - (sizeof(".phar")-1), ".phar", sizeof(".phar")-1) &&
        !strstr(ZSTR_VAL(filename), "://");
}
 
static zend_persistent_script *store_script_in_file_cache(zend_persistent_script *new_persistent_script)
{
    uint32_t memory_used;
 
    zend_shared_alloc_init_xlat_table();
 
    /* Calculate the required memory size */
    memory_used = zend_accel_script_persist_calc(new_persistent_script, 0);
 
    /* Allocate memory block */
#if defined(__AVX__) || defined(__SSE2__)
    /* Align to 64-byte boundary */
    ZCG(mem) = zend_arena_alloc(&CG(arena), memory_used + 64);
    ZCG(mem) = (void*)(((uintptr_t)ZCG(mem) + 63L) & ~63L);
#elif ZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT
    /* Align to 8-byte boundary */
    ZCG(mem) = zend_arena_alloc(&CG(arena), memory_used + 8);
    ZCG(mem) = (void*)(((uintptr_t)ZCG(mem) + 7L) & ~7L);
#else
    ZCG(mem) = zend_arena_alloc(&CG(arena), memory_used);
#endif
 
    zend_shared_alloc_clear_xlat_table();
 
    /* Copy into memory block */
    new_persistent_script = zend_accel_script_persist(new_persistent_script, 0);
 
    zend_shared_alloc_destroy_xlat_table();
 
    new_persistent_script->is_phar = is_phar_file(new_persistent_script->script.filename);
 
    /* Consistency check */
    if ((char*)new_persistent_script->mem + new_persistent_script->size != (char*)ZCG(mem)) {
        zend_accel_error(
            ((char*)new_persistent_script->mem + new_persistent_script->size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
            "Internal error: wrong size calculation: %s start=" ZEND_ADDR_FMT ", end=" ZEND_ADDR_FMT ", real=" ZEND_ADDR_FMT "\n",
            ZSTR_VAL(new_persistent_script->script.filename),
            (size_t)new_persistent_script->mem,
            (size_t)((char *)new_persistent_script->mem + new_persistent_script->size),
            (size_t)ZCG(mem));
    }
 
    zend_file_cache_script_store(new_persistent_script, /* is_shm */ false);
 
    return new_persistent_script;
}
 
static zend_persistent_script *cache_script_in_file_cache(zend_persistent_script *new_persistent_script, bool *from_shared_memory)
{
    uint32_t orig_compiler_options;
 
    orig_compiler_options = CG(compiler_options);
    CG(compiler_options) |= ZEND_COMPILE_WITH_FILE_CACHE;
    zend_optimize_script(&new_persistent_script->script, ZCG(accel_directives).optimization_level, ZCG(accel_directives).opt_debug_level);
    zend_accel_finalize_delayed_early_binding_list(new_persistent_script);
    CG(compiler_options) = orig_compiler_options;
 
    *from_shared_memory = true;
    return store_script_in_file_cache(new_persistent_script);
}
 
static zend_persistent_script *cache_script_in_shared_memory(zend_persistent_script *new_persistent_script, zend_string *key, bool *from_shared_memory)
{
    zend_accel_hash_entry *bucket;
    uint32_t memory_used;
    uint32_t orig_compiler_options;
 
    orig_compiler_options = CG(compiler_options);
    if (ZCG(accel_directives).file_cache) {
        CG(compiler_options) |= ZEND_COMPILE_WITH_FILE_CACHE;
    }
    zend_optimize_script(&new_persistent_script->script, ZCG(accel_directives).optimization_level, ZCG(accel_directives).opt_debug_level);
    zend_accel_finalize_delayed_early_binding_list(new_persistent_script);
    CG(compiler_options) = orig_compiler_options;
 
    /* exclusive lock */
    zend_shared_alloc_lock();
 
    /* Check if we still need to put the file into the cache (may be it was
     * already stored by another process. This final check is done under
     * exclusive lock) */
    bucket = zend_accel_hash_find_entry(&ZCSG(hash), new_persistent_script->script.filename);
    if (bucket) {
        zend_persistent_script *existing_persistent_script = (zend_persistent_script *)bucket->data;
 
        if (!existing_persistent_script->corrupted) {
            if (key &&
                (!ZCG(accel_directives).validate_timestamps ||
                 (new_persistent_script->timestamp == existing_persistent_script->timestamp))) {
                zend_accel_add_key(key, bucket);
            }
            zend_shared_alloc_unlock();
#if 1
            /* prefer the script already stored in SHM */
            free_persistent_script(new_persistent_script, 1);
            *from_shared_memory = true;
            return existing_persistent_script;
#else
            return new_persistent_script;
#endif
        }
    }
 
    if (zend_accel_hash_is_full(&ZCSG(hash))) {
        zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
        ZSMMG(memory_exhausted) = true;
        zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
        zend_shared_alloc_unlock();
        if (ZCG(accel_directives).file_cache) {
            new_persistent_script = store_script_in_file_cache(new_persistent_script);
            *from_shared_memory = true;
        }
        return new_persistent_script;
    }
 
    zend_shared_alloc_init_xlat_table();
 
    /* Calculate the required memory size */
    memory_used = zend_accel_script_persist_calc(new_persistent_script, 1);
 
    /* Allocate shared memory */
    ZCG(mem) = zend_shared_alloc_aligned(memory_used);
    if (!ZCG(mem)) {
        zend_shared_alloc_destroy_xlat_table();
        zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
        zend_shared_alloc_unlock();
        if (ZCG(accel_directives).file_cache) {
            new_persistent_script = store_script_in_file_cache(new_persistent_script);
            *from_shared_memory = true;
        }
        return new_persistent_script;
    }
 
    bzero_aligned(ZCG(mem), memory_used);
 
    zend_shared_alloc_clear_xlat_table();
 
    /* Copy into shared memory */
    new_persistent_script = zend_accel_script_persist(new_persistent_script, 1);
 
    zend_shared_alloc_destroy_xlat_table();
 
    new_persistent_script->is_phar = is_phar_file(new_persistent_script->script.filename);
 
    /* Consistency check */
    if ((char*)new_persistent_script->mem + new_persistent_script->size != (char*)ZCG(mem)) {
        zend_accel_error(
            ((char*)new_persistent_script->mem + new_persistent_script->size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
            "Internal error: wrong size calculation: %s start=" ZEND_ADDR_FMT ", end=" ZEND_ADDR_FMT ", real=" ZEND_ADDR_FMT "\n",
            ZSTR_VAL(new_persistent_script->script.filename),
            (size_t)new_persistent_script->mem,
            (size_t)((char *)new_persistent_script->mem + new_persistent_script->size),
            (size_t)ZCG(mem));
    }
 
    /* store script structure in the hash table */
    bucket = zend_accel_hash_update(&ZCSG(hash), new_persistent_script->script.filename, 0, new_persistent_script);
    if (bucket) {
        zend_accel_error(ACCEL_LOG_INFO, "Cached script '%s'", ZSTR_VAL(new_persistent_script->script.filename));
        if (key &&
            /* key may contain non-persistent PHAR aliases (see issues #115 and #149) */
            !zend_string_starts_with_literal(key, "phar://") &&
            !zend_string_equals(new_persistent_script->script.filename, key)) {
            /* link key to the same persistent script in hash table */
            zend_string *new_key = accel_new_interned_key(key);
 
            if (new_key) {
                if (zend_accel_hash_update(&ZCSG(hash), new_key, 1, bucket)) {
                    zend_accel_error(ACCEL_LOG_INFO, "Added key '%s'", ZSTR_VAL(key));
                } else {
                    zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
                    ZSMMG(memory_exhausted) = true;
                    zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
                }
            } else {
                zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
            }
        }
    }
 
    new_persistent_script->dynamic_members.memory_consumption = ZEND_ALIGNED_SIZE(new_persistent_script->size);
 
    zend_shared_alloc_unlock();
 
    if (ZCG(accel_directives).file_cache) {
        SHM_PROTECT();
        zend_file_cache_script_store(new_persistent_script, /* is_shm */ true);
        SHM_UNPROTECT();
    }
 
    *from_shared_memory = true;
    return new_persistent_script;
}
 
#define ZEND_AUTOGLOBAL_MASK_SERVER  (1 << 0)
#define ZEND_AUTOGLOBAL_MASK_ENV     (1 << 1)
#define ZEND_AUTOGLOBAL_MASK_REQUEST (1 << 2)
 
static int zend_accel_get_auto_globals(void)
{
    int mask = 0;
    if (zend_hash_exists(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_SERVER))) {
        mask |= ZEND_AUTOGLOBAL_MASK_SERVER;
    }
    if (zend_hash_exists(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_ENV))) {
        mask |= ZEND_AUTOGLOBAL_MASK_ENV;
    }
    if (zend_hash_exists(&EG(symbol_table), ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_REQUEST))) {
        mask |= ZEND_AUTOGLOBAL_MASK_REQUEST;
    }
    return mask;
}
 
static void zend_accel_set_auto_globals(int mask)
{
    if (mask & ZEND_AUTOGLOBAL_MASK_SERVER) {
        zend_is_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_SERVER));
    }
    if (mask & ZEND_AUTOGLOBAL_MASK_ENV) {
        zend_is_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_ENV));
    }
    if (mask & ZEND_AUTOGLOBAL_MASK_REQUEST) {
        zend_is_auto_global(ZSTR_KNOWN(ZEND_STR_AUTOGLOBAL_REQUEST));
    }
    ZCG(auto_globals_mask) |= mask;
}
 
static void replay_warnings(uint32_t num_warnings, zend_error_info **warnings) {
    for (uint32_t i = 0; i < num_warnings; i++) {
        zend_error_info *warning = warnings[i];
        zend_error_zstr_at(warning->type, warning->filename, warning->lineno, warning->message);
    }
}
 
static zend_persistent_script *opcache_compile_file(zend_file_handle *file_handle, int type, zend_op_array **op_array_p)
{
    zend_persistent_script *new_persistent_script;
    uint32_t orig_functions_count, orig_class_count;
    zend_op_array *orig_active_op_array;
    zval orig_user_error_handler;
    zend_op_array *op_array;
    bool do_bailout = false;
    accel_time_t timestamp = 0;
    uint32_t orig_compiler_options = 0;
 
    /* Try to open file */
    if (file_handle->type == ZEND_HANDLE_FILENAME) {
        if (accelerator_orig_zend_stream_open_function(file_handle) != SUCCESS) {
            *op_array_p = NULL;
            if (!EG(exception)) {
                if (type == ZEND_REQUIRE) {
                    zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, ZSTR_VAL(file_handle->filename));
                } else {
                    zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, ZSTR_VAL(file_handle->filename));
                }
            }
            return NULL;
        }
    }
 
    /* check blacklist right after ensuring that file was opened */
    if (file_handle->opened_path && zend_accel_blacklist_is_blacklisted(&accel_blacklist, ZSTR_VAL(file_handle->opened_path), ZSTR_LEN(file_handle->opened_path))) {
        SHM_UNPROTECT();
        ZCSG(blacklist_misses)++;
        SHM_PROTECT();
        *op_array_p = accelerator_orig_compile_file(file_handle, type);
        return NULL;
    }
 
    if (ZCG(accel_directives).validate_timestamps ||
        ZCG(accel_directives).file_update_protection ||
        ZCG(accel_directives).max_file_size > 0) {
        size_t size = 0;
 
        /* Obtain the file timestamps, *before* actually compiling them,
         * otherwise we have a race-condition.
         */
        timestamp = zend_get_file_handle_timestamp(file_handle, ZCG(accel_directives).max_file_size > 0 ? &size : NULL);
 
        /* If we can't obtain a timestamp (that means file is possibly socket)
         *  we won't cache it
         */
        if (timestamp == 0) {
            *op_array_p = accelerator_orig_compile_file(file_handle, type);
            return NULL;
        }
 
        /* check if file is too new (may be it's not written completely yet) */
        if (ZCG(accel_directives).file_update_protection &&
            ((accel_time_t)(ZCG(request_time) - ZCG(accel_directives).file_update_protection) < timestamp)) {
            *op_array_p = accelerator_orig_compile_file(file_handle, type);
            return NULL;
        }
 
        if (ZCG(accel_directives).max_file_size > 0 && size > (size_t)ZCG(accel_directives).max_file_size) {
            SHM_UNPROTECT();
            ZCSG(blacklist_misses)++;
            SHM_PROTECT();
            *op_array_p = accelerator_orig_compile_file(file_handle, type);
            return NULL;
        }
    }
 
    /* Save the original values for the op_array, function table and class table */
    orig_active_op_array = CG(active_op_array);
    orig_functions_count = EG(function_table)->nNumUsed;
    orig_class_count = EG(class_table)->nNumUsed;
    ZVAL_COPY_VALUE(&orig_user_error_handler, &EG(user_error_handler));
 
    /* Override them with ours */
    ZVAL_UNDEF(&EG(user_error_handler));
    if (ZCG(accel_directives).record_warnings) {
        zend_begin_record_errors();
    }
 
    zend_try {
        orig_compiler_options = CG(compiler_options);
        CG(compiler_options) |= ZEND_COMPILE_HANDLE_OP_ARRAY;
        CG(compiler_options) |= ZEND_COMPILE_DELAYED_BINDING;
        CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION;
        CG(compiler_options) |= ZEND_COMPILE_IGNORE_OTHER_FILES;
        CG(compiler_options) |= ZEND_COMPILE_IGNORE_OBSERVER;
#ifdef ZEND_WIN32
        /* On Windows, don't compile with internal classes. Shm may be attached from different
         * processes with internal classes living in different addresses. */
        CG(compiler_options) |= ZEND_COMPILE_IGNORE_INTERNAL_CLASSES;
#endif
        if (ZCG(accel_directives).file_cache) {
            CG(compiler_options) |= ZEND_COMPILE_WITH_FILE_CACHE;
            /* Don't compile with internal classes for file cache, in case some extension is removed
             * later on. We cannot assume it is there in the future. */
            CG(compiler_options) |= ZEND_COMPILE_IGNORE_INTERNAL_CLASSES;
        }
        op_array = *op_array_p = accelerator_orig_compile_file(file_handle, type);
        CG(compiler_options) = orig_compiler_options;
    } zend_catch {
        op_array = NULL;
        do_bailout = true;
        CG(compiler_options) = orig_compiler_options;
    } zend_end_try();
 
    /* Restore originals */
    CG(active_op_array) = orig_active_op_array;
    EG(user_error_handler) = orig_user_error_handler;
    EG(record_errors) = 0;
 
    if (!op_array) {
        /* compilation failed */
        zend_free_recorded_errors();
        if (do_bailout) {
            zend_bailout();
        }
        return NULL;
    }
 
    /* Build the persistent_script structure.
       Here we aren't sure we would store it, but we will need it
       further anyway.
    */
    new_persistent_script = create_persistent_script();
    new_persistent_script->script.main_op_array = *op_array;
    zend_accel_move_user_functions(CG(function_table), CG(function_table)->nNumUsed - orig_functions_count, &new_persistent_script->script);
    zend_accel_move_user_classes(CG(class_table), CG(class_table)->nNumUsed - orig_class_count, &new_persistent_script->script);
    zend_accel_build_delayed_early_binding_list(new_persistent_script);
    new_persistent_script->num_warnings = EG(num_errors);
    new_persistent_script->warnings = EG(errors);
    EG(num_errors) = 0;
    EG(errors) = NULL;
 
    efree(op_array); /* we have valid persistent_script, so it's safe to free op_array */
 
    /* Fill in the ping_auto_globals_mask for the new script. If jit for auto globals is enabled we
       will have to ping the used auto global variables before execution */
    if (PG(auto_globals_jit)) {
        new_persistent_script->ping_auto_globals_mask = zend_accel_get_auto_globals();
    }
 
    if (ZCG(accel_directives).validate_timestamps) {
        /* Obtain the file timestamps, *before* actually compiling them,
         * otherwise we have a race-condition.
         */
        new_persistent_script->timestamp = timestamp;
        new_persistent_script->dynamic_members.revalidate = ZCG(request_time) + ZCG(accel_directives).revalidate_freq;
    }
 
    if (file_handle->opened_path) {
        new_persistent_script->script.filename = zend_string_copy(file_handle->opened_path);
    } else {
        new_persistent_script->script.filename = zend_string_copy(file_handle->filename);
    }
    zend_string_hash_val(new_persistent_script->script.filename);
 
    /* Now persistent_script structure is ready in process memory */
    return new_persistent_script;
}
 
static zend_op_array *file_cache_compile_file(zend_file_handle *file_handle, int type)
{
    zend_persistent_script *persistent_script;
    zend_op_array *op_array = NULL;
    bool from_memory; /* if the script we've got is stored in SHM */
 
    if (php_is_stream_path(ZSTR_VAL(file_handle->filename)) &&
        !is_cacheable_stream_path(ZSTR_VAL(file_handle->filename))) {
        return accelerator_orig_compile_file(file_handle, type);
    }
 
    if (!file_handle->opened_path) {
        if (file_handle->type == ZEND_HANDLE_FILENAME &&
            accelerator_orig_zend_stream_open_function(file_handle) == FAILURE) {
            if (!EG(exception)) {
                if (type == ZEND_REQUIRE) {
                    zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, ZSTR_VAL(file_handle->filename));
                } else {
                    zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, ZSTR_VAL(file_handle->filename));
                }
            }
            return NULL;
        }
    }
 
    HANDLE_BLOCK_INTERRUPTIONS();
    SHM_UNPROTECT();
    persistent_script = zend_file_cache_script_load(file_handle);
    SHM_PROTECT();
    HANDLE_UNBLOCK_INTERRUPTIONS();
    if (persistent_script) {
        /* see bug #15471 (old BTS) */
        if (persistent_script->script.filename) {
            if (!EG(current_execute_data) || !EG(current_execute_data)->opline ||
                !EG(current_execute_data)->func ||
                !ZEND_USER_CODE(EG(current_execute_data)->func->common.type) ||
                EG(current_execute_data)->opline->opcode != ZEND_INCLUDE_OR_EVAL ||
                (EG(current_execute_data)->opline->extended_value != ZEND_INCLUDE_ONCE &&
                 EG(current_execute_data)->opline->extended_value != ZEND_REQUIRE_ONCE)) {
                if (zend_hash_add_empty_element(&EG(included_files), persistent_script->script.filename) != NULL) {
                    /* ext/phar has to load phar's metadata into memory */
                    if (persistent_script->is_phar) {
                        php_stream_statbuf ssb;
                        char *fname = emalloc(sizeof("phar://") + ZSTR_LEN(persistent_script->script.filename));
 
                        memcpy(fname, "phar://", sizeof("phar://") - 1);
                        memcpy(fname + sizeof("phar://") - 1, ZSTR_VAL(persistent_script->script.filename), ZSTR_LEN(persistent_script->script.filename) + 1);
                        php_stream_stat_path(fname, &ssb);
                        efree(fname);
                    }
                }
            }
        }
        replay_warnings(persistent_script->num_warnings, persistent_script->warnings);
 
        if (persistent_script->ping_auto_globals_mask & ~ZCG(auto_globals_mask)) {
            zend_accel_set_auto_globals(persistent_script->ping_auto_globals_mask & ~ZCG(auto_globals_mask));
        }
 
        return zend_accel_load_script(persistent_script, 1);
    }
 
    persistent_script = opcache_compile_file(file_handle, type, &op_array);
 
    if (persistent_script) {
        from_memory = false;
        persistent_script = cache_script_in_file_cache(persistent_script, &from_memory);
        return zend_accel_load_script(persistent_script, from_memory);
    }
 
    return op_array;
}
 
static int check_persistent_script_access(zend_persistent_script *persistent_script)
{
    char *phar_path, *ptr;
    if ((ZSTR_LEN(persistent_script->script.filename)<sizeof("phar://.phar")) ||
        memcmp(ZSTR_VAL(persistent_script->script.filename), "phar://", sizeof("phar://")-1)) {
 
        return access(ZSTR_VAL(persistent_script->script.filename), R_OK) != 0;
 
    } else {
        /* we got a cached file from .phar, so we have to strip prefix and path inside .phar to check access() */
        phar_path = estrdup(ZSTR_VAL(persistent_script->script.filename)+sizeof("phar://")-1);
        if ((ptr = strstr(phar_path, ".phar/")) != NULL)
        {
            *(ptr+sizeof(".phar/")-2) = 0; /* strip path inside .phar file */
        }
        bool ret = access(phar_path, R_OK) != 0;
        efree(phar_path);
        return ret;
    }
}
 
/* zend_compile() replacement */
zend_op_array *persistent_compile_file(zend_file_handle *file_handle, int type)
{
    zend_persistent_script *persistent_script = NULL;
    zend_string *key = NULL;
    bool from_shared_memory; /* if the script we've got is stored in SHM */
 
    if (!file_handle->filename || !ZCG(accelerator_enabled)) {
        /* The Accelerator is disabled, act as if without the Accelerator */
        ZCG(cache_opline) = NULL;
        ZCG(cache_persistent_script) = NULL;
        if (file_handle->filename
         && ZCG(accel_directives).file_cache
         && ZCG(enabled) && accel_startup_ok) {
            return file_cache_compile_file(file_handle, type);
        }
        return accelerator_orig_compile_file(file_handle, type);
    } else if (file_cache_only) {
        ZCG(cache_opline) = NULL;
        ZCG(cache_persistent_script) = NULL;
        return file_cache_compile_file(file_handle, type);
    } else if ((ZCSG(restart_in_progress) && accel_restart_is_active())) {
        if (ZCG(accel_directives).file_cache) {
            return file_cache_compile_file(file_handle, type);
        }
        ZCG(cache_opline) = NULL;
        ZCG(cache_persistent_script) = NULL;
        return accelerator_orig_compile_file(file_handle, type);
    }
 
    /* In case this callback is called from include_once, require_once or it's
     * a main FastCGI request, the key must be already calculated, and cached
     * persistent script already found */
    if (ZCG(cache_persistent_script) &&
        ((!EG(current_execute_data) &&
          file_handle->primary_script &&
          ZCG(cache_opline) == NULL) ||
         (EG(current_execute_data) &&
          EG(current_execute_data)->func &&
          ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
          ZCG(cache_opline) == EG(current_execute_data)->opline))) {
 
        persistent_script = ZCG(cache_persistent_script);
        if (ZSTR_LEN(ZCG(key))) {
            key = ZCG(key);
        }
 
    } else {
        if (!ZCG(accel_directives).revalidate_path) {
            /* try to find cached script by key */
            key = accel_make_persistent_key(file_handle->filename);
            if (!key) {
                ZCG(cache_opline) = NULL;
                ZCG(cache_persistent_script) = NULL;
                return accelerator_orig_compile_file(file_handle, type);
            }
            persistent_script = zend_accel_hash_find(&ZCSG(hash), key);
        } else if (UNEXPECTED(php_is_stream_path(ZSTR_VAL(file_handle->filename)) && !is_cacheable_stream_path(ZSTR_VAL(file_handle->filename)))) {
            ZCG(cache_opline) = NULL;
            ZCG(cache_persistent_script) = NULL;
            return accelerator_orig_compile_file(file_handle, type);
        }
 
        if (!persistent_script) {
            /* try to find cached script by full real path */
            zend_accel_hash_entry *bucket;
 
            /* open file to resolve the path */
            if (file_handle->type == ZEND_HANDLE_FILENAME
             && accelerator_orig_zend_stream_open_function(file_handle) == FAILURE) {
                if (!EG(exception)) {
                    if (type == ZEND_REQUIRE) {
                        zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, ZSTR_VAL(file_handle->filename));
                    } else {
                        zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, ZSTR_VAL(file_handle->filename));
                    }
                }
                return NULL;
            }
 
            if (file_handle->opened_path) {
                bucket = zend_accel_hash_find_entry(&ZCSG(hash), file_handle->opened_path);
 
                if (bucket) {
                    persistent_script = (zend_persistent_script *)bucket->data;
 
                    if (key && !persistent_script->corrupted) {
                        HANDLE_BLOCK_INTERRUPTIONS();
                        SHM_UNPROTECT();
                        zend_shared_alloc_lock();
                        zend_accel_add_key(key, bucket);
                        zend_shared_alloc_unlock();
                        SHM_PROTECT();
                        HANDLE_UNBLOCK_INTERRUPTIONS();
                    }
                }
            }
        }
    }
 
    /* clear cache */
    ZCG(cache_opline) = NULL;
    ZCG(cache_persistent_script) = NULL;
 
    if (persistent_script && persistent_script->corrupted) {
        persistent_script = NULL;
    }
 
    /* Make sure we only increase the currently running processes semaphore
     * once each execution (this function can be called more than once on
     * each execution)
     */
    if (!ZCG(counted)) {
        if (accel_activate_add() == FAILURE) {
            if (ZCG(accel_directives).file_cache) {
                return file_cache_compile_file(file_handle, type);
            }
            return accelerator_orig_compile_file(file_handle, type);
        }
        ZCG(counted) = true;
    }
 
    /* Revalidate accessibility of cached file */
    if (EXPECTED(persistent_script != NULL) &&
        UNEXPECTED(ZCG(accel_directives).validate_permission) &&
        file_handle->type == ZEND_HANDLE_FILENAME &&
        UNEXPECTED(check_persistent_script_access(persistent_script))) {
        if (!EG(exception)) {
            if (type == ZEND_REQUIRE) {
                zend_message_dispatcher(ZMSG_FAILED_REQUIRE_FOPEN, ZSTR_VAL(file_handle->filename));
            } else {
                zend_message_dispatcher(ZMSG_FAILED_INCLUDE_FOPEN, ZSTR_VAL(file_handle->filename));
            }
        }
        return NULL;
    }
 
    HANDLE_BLOCK_INTERRUPTIONS();
    SHM_UNPROTECT();
 
    /* If script is found then validate_timestamps if option is enabled */
    if (persistent_script && ZCG(accel_directives).validate_timestamps) {
        if (validate_timestamp_and_record(persistent_script, file_handle) == FAILURE) {
            zend_accel_lock_discard_script(persistent_script);
            persistent_script = NULL;
        }
    }
 
    /* Check the second level cache */
    if (!persistent_script && ZCG(accel_directives).file_cache) {
        persistent_script = zend_file_cache_script_load(file_handle);
    }
 
    /* If script was not found or invalidated by validate_timestamps */
    if (!persistent_script) {
        uint32_t old_const_num = zend_hash_next_free_element(EG(zend_constants));
        zend_op_array *op_array;
 
        /* Cache miss.. */
        ZCSG(misses)++;
 
        /* No memory left. Behave like without the Accelerator */
        if (ZSMMG(memory_exhausted) || ZCSG(restart_pending)) {
            SHM_PROTECT();
            HANDLE_UNBLOCK_INTERRUPTIONS();
            if (ZCG(accel_directives).file_cache) {
                return file_cache_compile_file(file_handle, type);
            }
            return accelerator_orig_compile_file(file_handle, type);
        }
 
        SHM_PROTECT();
        HANDLE_UNBLOCK_INTERRUPTIONS();
        persistent_script = opcache_compile_file(file_handle, type, &op_array);
        HANDLE_BLOCK_INTERRUPTIONS();
        SHM_UNPROTECT();
 
        /* Try and cache the script and assume that it is returned from_shared_memory.
         * If it isn't compile_and_cache_file() changes the flag to 0
         */
        from_shared_memory = false;
        if (persistent_script) {
            /* See GH-17246: we disable GC so that user code cannot be executed during the optimizer run. */
            bool orig_gc_state = gc_enable(false);
            persistent_script = cache_script_in_shared_memory(persistent_script, key, &from_shared_memory);
            gc_enable(orig_gc_state);
        }
 
        /* Caching is disabled, returning op_array;
         * or something went wrong during compilation, returning NULL
         */
        if (!persistent_script) {
            SHM_PROTECT();
            HANDLE_UNBLOCK_INTERRUPTIONS();
            return op_array;
        }
        if (from_shared_memory) {
            /* Delete immutable arrays moved into SHM */
            uint32_t new_const_num = zend_hash_next_free_element(EG(zend_constants));
            while (new_const_num > old_const_num) {
                new_const_num--;
                zend_hash_index_del(EG(zend_constants), new_const_num);
            }
        }
        persistent_script->dynamic_members.last_used = ZCG(request_time);
        SHM_PROTECT();
        HANDLE_UNBLOCK_INTERRUPTIONS();
    } else {
 
#ifndef ZEND_WIN32
        ZCSG(hits)++; /* TBFixed: may lose one hit */
        persistent_script->dynamic_members.hits++; /* see above */
#else
#ifdef ZEND_ENABLE_ZVAL_LONG64
        InterlockedIncrement64(&ZCSG(hits));
        InterlockedIncrement64(&persistent_script->dynamic_members.hits);
#else
        InterlockedIncrement(&ZCSG(hits));
        InterlockedIncrement(&persistent_script->dynamic_members.hits);
#endif
#endif
 
        /* see bug #15471 (old BTS) */
        if (persistent_script->script.filename) {
            if (!EG(current_execute_data) ||
                !EG(current_execute_data)->func ||
                !ZEND_USER_CODE(EG(current_execute_data)->func->common.type) ||
                !EG(current_execute_data)->opline ||
                EG(current_execute_data)->opline->opcode != ZEND_INCLUDE_OR_EVAL ||
                (EG(current_execute_data)->opline->extended_value != ZEND_INCLUDE_ONCE &&
                 EG(current_execute_data)->opline->extended_value != ZEND_REQUIRE_ONCE)) {
                if (zend_hash_add_empty_element(&EG(included_files), persistent_script->script.filename) != NULL) {
                    /* ext/phar has to load phar's metadata into memory */
                    if (persistent_script->is_phar) {
                        php_stream_statbuf ssb;
                        char *fname = emalloc(sizeof("phar://") + ZSTR_LEN(persistent_script->script.filename));
 
                        memcpy(fname, "phar://", sizeof("phar://") - 1);
                        memcpy(fname + sizeof("phar://") - 1, ZSTR_VAL(persistent_script->script.filename), ZSTR_LEN(persistent_script->script.filename) + 1);
                        php_stream_stat_path(fname, &ssb);
                        efree(fname);
                    }
                }
            }
        }
        persistent_script->dynamic_members.last_used = ZCG(request_time);
        SHM_PROTECT();
        HANDLE_UNBLOCK_INTERRUPTIONS();
 
        replay_warnings(persistent_script->num_warnings, persistent_script->warnings);
        from_shared_memory = true;
    }
 
    /* Fetch jit auto globals used in the script before execution */
    if (persistent_script->ping_auto_globals_mask & ~ZCG(auto_globals_mask)) {
        zend_accel_set_auto_globals(persistent_script->ping_auto_globals_mask & ~ZCG(auto_globals_mask));
    }
 
    return zend_accel_load_script(persistent_script, from_shared_memory);
}
 
static zend_always_inline zend_inheritance_cache_entry* zend_accel_inheritance_cache_find(zend_inheritance_cache_entry *entry, zend_class_entry *ce, zend_class_entry *parent, zend_class_entry **traits_and_interfaces, bool *needs_autoload_ptr)
{
    uint32_t i;
 
    ZEND_ASSERT(ce->ce_flags & ZEND_ACC_IMMUTABLE);
    ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_LINKED));
 
    while (entry) {
        bool found = true;
        bool needs_autoload = false;
 
        if (entry->parent != parent) {
            found = false;
        } else {
            for (i = 0; i < ce->num_traits + ce->num_interfaces; i++) {
                if (entry->traits_and_interfaces[i] != traits_and_interfaces[i]) {
                    found = false;
                    break;
                }
            }
            if (found && entry->dependencies) {
                for (i = 0; i < entry->dependencies_count; i++) {
                    zend_class_entry *ce = zend_lookup_class_ex(entry->dependencies[i].name, NULL, ZEND_FETCH_CLASS_NO_AUTOLOAD);
 
                    if (ce != entry->dependencies[i].ce) {
                        if (!ce) {
                            needs_autoload = true;
                        } else {
                            found = false;
                            break;
                        }
                    }
                }
            }
        }
        if (found) {
            *needs_autoload_ptr = needs_autoload;
            return entry;
        }
        entry = entry->next;
    }
 
    return NULL;
}
 
static zend_class_entry* zend_accel_inheritance_cache_get(zend_class_entry *ce, zend_class_entry *parent, zend_class_entry **traits_and_interfaces)
{
    uint32_t i;
    bool needs_autoload;
    zend_inheritance_cache_entry *entry = ce->inheritance_cache;
 
    while (entry) {
        entry = zend_accel_inheritance_cache_find(entry, ce, parent, traits_and_interfaces, &needs_autoload);
        if (entry) {
            if (!needs_autoload) {
                replay_warnings(entry->num_warnings, entry->warnings);
                if (ZCSG(map_ptr_last) > CG(map_ptr_last)) {
                    zend_map_ptr_extend(ZCSG(map_ptr_last));
                }
                ce = entry->ce;
                if (ZSTR_HAS_CE_CACHE(ce->name)) {
                    ZSTR_SET_CE_CACHE_EX(ce->name, ce, 0);
                }
                return ce;
            }
 
            for (i = 0; i < entry->dependencies_count; i++) {
                zend_class_entry *ce = zend_lookup_class_ex(entry->dependencies[i].name, NULL, 0);
 
                if (ce == NULL) {
                    return NULL;
                }
            }
        }
    }
 
    return NULL;
}
 
static zend_class_entry* zend_accel_inheritance_cache_add(zend_class_entry *ce, zend_class_entry *proto, zend_class_entry *parent, zend_class_entry **traits_and_interfaces, HashTable *dependencies)
{
    zend_persistent_script dummy;
    size_t size;
    uint32_t i;
    bool needs_autoload;
    zend_class_entry *new_ce;
    zend_inheritance_cache_entry *entry;
 
    ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_IMMUTABLE));
    ZEND_ASSERT(ce->ce_flags & ZEND_ACC_LINKED);
 
    if (!ZCG(accelerator_enabled) ||
        (ZCSG(restart_in_progress) && accel_restart_is_active())) {
        return NULL;
    }
 
    if (traits_and_interfaces && dependencies) {
        for (i = 0; i < proto->num_traits + proto->num_interfaces; i++) {
            if (traits_and_interfaces[i]) {
                zend_hash_del(dependencies, traits_and_interfaces[i]->name);
            }
        }
    }
 
    SHM_UNPROTECT();
    zend_shared_alloc_lock();
 
    entry = proto->inheritance_cache;
    while (entry) {
        entry = zend_accel_inheritance_cache_find(entry, proto, parent, traits_and_interfaces, &needs_autoload);
        if (entry) {
            zend_shared_alloc_unlock();
            SHM_PROTECT();
            if (!needs_autoload) {
                zend_map_ptr_extend(ZCSG(map_ptr_last));
                return entry->ce;
            } else {
                return NULL;
            }
        }
    }
 
    zend_shared_alloc_init_xlat_table();
 
    memset(&dummy, 0, sizeof(dummy));
    dummy.size = ZEND_ALIGNED_SIZE(
        sizeof(zend_inheritance_cache_entry) -
        sizeof(void*) +
        (sizeof(void*) * (proto->num_traits + proto->num_interfaces)));
    if (dependencies) {
        dummy.size += ZEND_ALIGNED_SIZE(zend_hash_num_elements(dependencies) * sizeof(zend_class_dependency));
    }
    ZCG(current_persistent_script) = &dummy;
    zend_persist_class_entry_calc(ce);
    zend_persist_warnings_calc(EG(num_errors), EG(errors));
    size = dummy.size;
 
    zend_shared_alloc_clear_xlat_table();
 
#if ZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT
    /* Align to 8-byte boundary */
    ZCG(mem) = zend_shared_alloc(size + 8);
#else
    ZCG(mem) = zend_shared_alloc(size);
#endif
 
    if (!ZCG(mem)) {
        zend_shared_alloc_destroy_xlat_table();
        zend_shared_alloc_unlock();
        SHM_PROTECT();
        return NULL;
    }
 
    zend_map_ptr_extend(ZCSG(map_ptr_last));
 
#if ZEND_MM_NEED_EIGHT_BYTE_REALIGNMENT
    /* Align to 8-byte boundary */
    ZCG(mem) = (void*)(((uintptr_t)ZCG(mem) + 7L) & ~7L);
#endif
 
    memset(ZCG(mem), 0, size);
    entry = (zend_inheritance_cache_entry*)ZCG(mem);
    ZCG(mem) = (char*)ZCG(mem) +
        ZEND_ALIGNED_SIZE(
            (sizeof(zend_inheritance_cache_entry) -
             sizeof(void*) +
             (sizeof(void*) * (proto->num_traits + proto->num_interfaces))));
    entry->parent = parent;
    for (i = 0; i < proto->num_traits + proto->num_interfaces; i++) {
        entry->traits_and_interfaces[i] = traits_and_interfaces[i];
    }
    if (dependencies && zend_hash_num_elements(dependencies)) {
        zend_string *dep_name;
        zend_class_entry *dep_ce;
 
        i = 0;
        entry->dependencies_count = zend_hash_num_elements(dependencies);
        entry->dependencies = (zend_class_dependency*)ZCG(mem);
        ZEND_HASH_MAP_FOREACH_STR_KEY_PTR(dependencies, dep_name, dep_ce) {
#if ZEND_DEBUG
            ZEND_ASSERT(zend_accel_in_shm(dep_name));
#endif
            entry->dependencies[i].name = dep_name;
            entry->dependencies[i].ce = dep_ce;
            i++;
        } ZEND_HASH_FOREACH_END();
        ZCG(mem) = (char*)ZCG(mem) + zend_hash_num_elements(dependencies) * sizeof(zend_class_dependency);
    }
 
    /* See GH-15657: `zend_persist_class_entry` can JIT property hook code via
     * `zend_persist_property_info`, but the inheritance cache should not
     * JIT those at this point in time. */
#ifdef HAVE_JIT
    bool jit_on_old = JIT_G(on);
    JIT_G(on) = false;
#endif
 
    entry->ce = new_ce = zend_persist_class_entry(ce);
    zend_update_parent_ce(new_ce);
 
#ifdef HAVE_JIT
    JIT_G(on) = jit_on_old;
#endif
 
    entry->num_warnings = EG(num_errors);
    entry->warnings = zend_persist_warnings(EG(num_errors), EG(errors));
    entry->next = proto->inheritance_cache;
    proto->inheritance_cache = entry;
 
    EG(num_errors) = 0;
    EG(errors) = NULL;
 
    ZCSG(map_ptr_last) = CG(map_ptr_last);
 
    zend_shared_alloc_destroy_xlat_table();
 
    zend_shared_alloc_unlock();
    SHM_PROTECT();
 
    /* Consistency check */
    if ((char*)entry + size != (char*)ZCG(mem)) {
        zend_accel_error(
            ((char*)entry + size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
            "Internal error: wrong class size calculation: %s start=" ZEND_ADDR_FMT ", end=" ZEND_ADDR_FMT ", real=" ZEND_ADDR_FMT "\n",
            ZSTR_VAL(ce->name),
            (size_t)entry,
            (size_t)((char *)entry + size),
            (size_t)ZCG(mem));
    }
 
    zend_map_ptr_extend(ZCSG(map_ptr_last));
 
    return new_ce;
}
 
#ifdef ZEND_WIN32
static zend_result accel_gen_uname_id(void)
{
    PHP_MD5_CTX ctx;
    unsigned char digest[16];
    wchar_t uname[UNLEN + 1];
    DWORD unsize = UNLEN;
 
    if (!GetUserNameW(uname, &unsize)) {
        return FAILURE;
    }
    PHP_MD5Init(&ctx);
    PHP_MD5Update(&ctx, (void *) uname, (unsize - 1) * sizeof(wchar_t));
    PHP_MD5Update(&ctx, ZCG(accel_directives).cache_id, strlen(ZCG(accel_directives).cache_id));
    PHP_MD5Final(digest, &ctx);
    php_hash_bin2hex(accel_uname_id, digest, sizeof digest);
    return SUCCESS;
}
#endif
 
/* zend_stream_open_function() replacement for PHP 5.3 and above */
static zend_result persistent_stream_open_function(zend_file_handle *handle)
{
    if (ZCG(cache_persistent_script)) {
        /* check if callback is called from include_once or it's a main request */
        if ((!EG(current_execute_data) &&
             handle->primary_script &&
             ZCG(cache_opline) == NULL) ||
            (EG(current_execute_data) &&
             EG(current_execute_data)->func &&
             ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
             ZCG(cache_opline) == EG(current_execute_data)->opline)) {
 
            /* we are in include_once or FastCGI request */
            handle->opened_path = zend_string_copy(ZCG(cache_persistent_script)->script.filename);
            return SUCCESS;
        }
        ZCG(cache_opline) = NULL;
        ZCG(cache_persistent_script) = NULL;
    }
    return accelerator_orig_zend_stream_open_function(handle);
}
 
/* zend_resolve_path() replacement for PHP 5.3 and above */
static zend_string* persistent_zend_resolve_path(zend_string *filename)
{
    if (!file_cache_only &&
        ZCG(accelerator_enabled)) {
 
        /* check if callback is called from include_once or it's a main request */
        if ((!EG(current_execute_data)) ||
            (EG(current_execute_data) &&
             EG(current_execute_data)->func &&
             ZEND_USER_CODE(EG(current_execute_data)->func->common.type) &&
             EG(current_execute_data)->opline->opcode == ZEND_INCLUDE_OR_EVAL &&
             (EG(current_execute_data)->opline->extended_value == ZEND_INCLUDE_ONCE ||
              EG(current_execute_data)->opline->extended_value == ZEND_REQUIRE_ONCE))) {
 
            /* we are in include_once or FastCGI request */
            zend_string *resolved_path;
            zend_string *key = NULL;
 
            if (!ZCG(accel_directives).revalidate_path) {
                /* lookup by "not-real" path */
                key = accel_make_persistent_key(filename);
                if (key) {
                    zend_accel_hash_entry *bucket = zend_accel_hash_find_entry(&ZCSG(hash), key);
                    if (bucket != NULL) {
                        zend_persistent_script *persistent_script = (zend_persistent_script *)bucket->data;
                        if (!persistent_script->corrupted) {
                            ZCG(cache_opline) = EG(current_execute_data) ? EG(current_execute_data)->opline : NULL;
                            ZCG(cache_persistent_script) = persistent_script;
                            return zend_string_copy(persistent_script->script.filename);
                        }
                    }
                } else {
                    ZCG(cache_opline) = NULL;
                    ZCG(cache_persistent_script) = NULL;
                    return accelerator_orig_zend_resolve_path(filename);
                }
            }
 
            /* find the full real path */
            resolved_path = accelerator_orig_zend_resolve_path(filename);
 
            if (resolved_path) {
                /* lookup by real path */
                zend_accel_hash_entry *bucket = zend_accel_hash_find_entry(&ZCSG(hash), resolved_path);
                if (bucket) {
                    zend_persistent_script *persistent_script = (zend_persistent_script *)bucket->data;
                    if (!persistent_script->corrupted) {
                        if (key) {
                            /* add another "key" for the same bucket */
                            HANDLE_BLOCK_INTERRUPTIONS();
                            SHM_UNPROTECT();
                            zend_shared_alloc_lock();
                            zend_accel_add_key(key, bucket);
                            zend_shared_alloc_unlock();
                            SHM_PROTECT();
                            HANDLE_UNBLOCK_INTERRUPTIONS();
                        } else {
                            ZSTR_LEN(ZCG(key)) = 0;
                        }
                        ZCG(cache_opline) = EG(current_execute_data) ? EG(current_execute_data)->opline : NULL;
                        ZCG(cache_persistent_script) = persistent_script;
                        return resolved_path;
                    }
                }
            }
 
            ZCG(cache_opline) = NULL;
            ZCG(cache_persistent_script) = NULL;
            return resolved_path;
        }
    }
    ZCG(cache_opline) = NULL;
    ZCG(cache_persistent_script) = NULL;
    return accelerator_orig_zend_resolve_path(filename);
}
 
static void zend_reset_cache_vars(void)
{
    ZSMMG(memory_exhausted) = false;
    ZCSG(hits) = 0;
    ZCSG(misses) = 0;
    ZCSG(blacklist_misses) = 0;
    ZSMMG(wasted_shared_memory) = 0;
    ZCSG(restart_pending) = false;
    ZCSG(force_restart_time) = 0;
    ZCSG(map_ptr_last) = CG(map_ptr_last);
    ZCSG(map_ptr_static_last) = zend_map_ptr_static_last;
}
 
static void accel_reset_pcre_cache(void)
{
    Bucket *p;
 
    ZEND_HASH_MAP_FOREACH_BUCKET(&PCRE_G(pcre_cache), p) {
        /* Remove PCRE cache entries with inconsistent keys */
        if (zend_accel_in_shm(p->key)) {
            p->key = NULL;
            zend_hash_del_bucket(&PCRE_G(pcre_cache), p);
        }
    } ZEND_HASH_FOREACH_END();
}
 
ZEND_RINIT_FUNCTION(zend_accelerator)
{
    if (!ZCG(enabled) || !accel_startup_ok) {
        ZCG(accelerator_enabled) = false;
        return SUCCESS;
    }
 
    /* PHP-5.4 and above return "double", but we use 1 sec precision */
    ZCG(auto_globals_mask) = 0;
    ZCG(request_time) = (time_t)sapi_get_request_time();
    ZCG(cache_opline) = NULL;
    ZCG(cache_persistent_script) = NULL;
    ZCG(include_path_key_len) = 0;
    ZCG(include_path_check) = true;
 
    ZCG(cwd) = NULL;
    ZCG(cwd_key_len) = 0;
    ZCG(cwd_check) = true;
 
    if (file_cache_only) {
        ZCG(accelerator_enabled) = false;
        return SUCCESS;
    }
 
#ifndef ZEND_WIN32
    if (ZCG(accel_directives).validate_root) {
        struct stat buf;
 
        if (stat("/", &buf) != 0) {
            ZCG(root_hash) = 0;
        } else {
            ZCG(root_hash) = buf.st_ino;
            if (sizeof(buf.st_ino) > sizeof(ZCG(root_hash))) {
                if (ZCG(root_hash) != buf.st_ino) {
                    zend_string *key = ZSTR_INIT_LITERAL("opcache.enable", 0);
                    zend_alter_ini_entry_chars(key, "0", 1, ZEND_INI_SYSTEM, ZEND_INI_STAGE_RUNTIME);
                    zend_string_release_ex(key, 0);
                    zend_accel_error(ACCEL_LOG_WARNING, "Can't cache files in chroot() directory with too big inode");
                    return SUCCESS;
                }
            }
        }
    } else {
        ZCG(root_hash) = 0;
    }
#endif
 
    HANDLE_BLOCK_INTERRUPTIONS();
    SHM_UNPROTECT();
 
    if (ZCG(counted)) {
#ifdef ZTS
        zend_accel_error(ACCEL_LOG_WARNING, "Stuck count for thread id %lu", (unsigned long) tsrm_thread_id());
#else
        zend_accel_error(ACCEL_LOG_WARNING, "Stuck count for pid %d", getpid());
#endif
        accel_unlock_all();
        ZCG(counted) = false;
    }
 
    if (ZCSG(restart_pending)) {
        zend_shared_alloc_lock();
        if (ZCSG(restart_pending)) { /* check again, to ensure that the cache wasn't already cleaned by another process */
            if (accel_is_inactive()) {
                zend_accel_error(ACCEL_LOG_DEBUG, "Restarting!");
                ZCSG(restart_pending) = false;
                switch ZCSG(restart_reason) {
                    case ACCEL_RESTART_OOM:
                        ZCSG(oom_restarts)++;
                        break;
                    case ACCEL_RESTART_HASH:
                        ZCSG(hash_restarts)++;
                        break;
                    case ACCEL_RESTART_USER:
                        ZCSG(manual_restarts)++;
                        break;
                }
                accel_restart_enter();
 
                zend_map_ptr_reset();
                zend_reset_cache_vars();
                zend_accel_hash_clean(&ZCSG(hash));
 
                if (ZCG(accel_directives).interned_strings_buffer) {
                    accel_interned_strings_restore_state();
                }
 
                zend_shared_alloc_restore_state();
                if (ZCSG(preload_script)) {
                    preload_restart();
                }
 
#ifdef HAVE_JIT
                zend_jit_restart();
#endif
 
                ZCSG(accelerator_enabled) = ZCSG(cache_status_before_restart);
                if (ZCSG(last_restart_time) < ZCG(request_time)) {
                    ZCSG(last_restart_time) = ZCG(request_time);
                } else {
                    ZCSG(last_restart_time)++;
                }
                accel_restart_leave();
            }
        }
        zend_shared_alloc_unlock();
    }
 
    ZCG(accelerator_enabled) = ZCSG(accelerator_enabled);
 
    SHM_PROTECT();
    HANDLE_UNBLOCK_INTERRUPTIONS();
 
    if (ZCG(accelerator_enabled) && ZCSG(last_restart_time) != ZCG(last_restart_time)) {
        /* SHM was reinitialized. */
        ZCG(last_restart_time) = ZCSG(last_restart_time);
 
        /* Reset in-process realpath cache */
        realpath_cache_clean();
 
        accel_reset_pcre_cache();
        ZCG(pcre_reseted) = false;
    } else if (!ZCG(accelerator_enabled) && !ZCG(pcre_reseted)) {
        accel_reset_pcre_cache();
        ZCG(pcre_reseted) = true;
    }
 
 
#ifdef HAVE_JIT
    zend_jit_activate();
#endif
 
    if (ZCSG(preload_script)) {
        preload_activate();
    }
 
    return SUCCESS;
}
 
#ifdef HAVE_JIT
void accel_deactivate(void)
{
    zend_jit_deactivate();
}
#endif
 
zend_result accel_post_deactivate(void)
{
    if (ZCG(cwd)) {
        zend_string_release_ex(ZCG(cwd), 0);
        ZCG(cwd) = NULL;
    }
 
    if (!ZCG(enabled) || !accel_startup_ok) {
        return SUCCESS;
    }
 
    zend_shared_alloc_safe_unlock(); /* be sure we didn't leave cache locked */
    accel_unlock_all();
    ZCG(counted) = false;
 
    return SUCCESS;
}
 
static int accelerator_remove_cb(zend_extension *element1, zend_extension *element2)
{
    (void)element2; /* keep the compiler happy */
 
    if (!strcmp(element1->name, ACCELERATOR_PRODUCT_NAME )) {
        element1->startup = NULL;
#if 0
        /* We have to call shutdown callback it to free TS resources */
        element1->shutdown = NULL;
#endif
        element1->activate = NULL;
        element1->deactivate = NULL;
        element1->op_array_handler = NULL;
 
#ifdef __DEBUG_MESSAGES__
        fprintf(stderr, ACCELERATOR_PRODUCT_NAME " is disabled: %s\n", (zps_failure_reason ? zps_failure_reason : "unknown error"));
        fflush(stderr);
#endif
    }
 
    return 0;
}
 
static void zps_startup_failure(const char *reason, const char *api_reason, int (*cb)(zend_extension *, zend_extension *))
{
    accel_startup_ok = false;
    zps_failure_reason = reason;
    zps_api_failure_reason = api_reason?api_reason:reason;
    zend_llist_del_element(&zend_extensions, NULL, (int (*)(void *, void *))cb);
}
 
static inline zend_result accel_find_sapi(void)
{
    static const char *supported_sapis[] = {
        "apache",
        "fastcgi",
        "cli-server",
        "cgi-fcgi",
        "fpm-fcgi",
        "fpmi-fcgi",
        "apache2handler",
        "litespeed",
        "uwsgi",
        "fuzzer",
        "frankenphp",
        "ngx-php",
        NULL
    };
    const char **sapi_name;
 
    if (sapi_module.name) {
        for (sapi_name = supported_sapis; *sapi_name; sapi_name++) {
            if (strcmp(sapi_module.name, *sapi_name) == 0) {
                return SUCCESS;
            }
        }
        if (ZCG(accel_directives).enable_cli && (
            strcmp(sapi_module.name, "cli") == 0
          || strcmp(sapi_module.name, "phpdbg") == 0)) {
            return SUCCESS;
        }
    }
 
    return FAILURE;
}
 
static zend_result zend_accel_init_shm(void)
{
    int i;
    size_t accel_shared_globals_size;
 
    zend_shared_alloc_lock();
 
    if (ZCG(accel_directives).interned_strings_buffer) {
        accel_shared_globals_size = sizeof(zend_accel_shared_globals) + ZCG(accel_directives).interned_strings_buffer * 1024 * 1024;
    } else {
        /* Make sure there is always at least one interned string hash slot,
         * so the table can be queried unconditionally. */
        accel_shared_globals_size = sizeof(zend_accel_shared_globals) + sizeof(zend_string_table_pos_t);
    }
 
    accel_shared_globals = zend_shared_alloc(accel_shared_globals_size);
    if (!accel_shared_globals) {
        zend_shared_alloc_unlock();
        zend_accel_error_noreturn(ACCEL_LOG_FATAL,
                "Insufficient shared memory for interned strings buffer! (tried to allocate %zu bytes)",
                accel_shared_globals_size);
        return FAILURE;
    }
    memset(accel_shared_globals, 0, sizeof(zend_accel_shared_globals));
    ZSMMG(app_shared_globals) = accel_shared_globals;
 
    zend_accel_hash_init(&ZCSG(hash), ZCG(accel_directives).max_accelerated_files);
 
    if (ZCG(accel_directives).interned_strings_buffer) {
        uint32_t hash_size;
 
        /* must be a power of two */
        hash_size = ZCG(accel_directives).interned_strings_buffer * (32 * 1024);
        hash_size |= (hash_size >> 1);
        hash_size |= (hash_size >> 2);
        hash_size |= (hash_size >> 4);
        hash_size |= (hash_size >> 8);
        hash_size |= (hash_size >> 16);
 
        ZCSG(interned_strings).nTableMask =
            hash_size * sizeof(zend_string_table_pos_t);
        ZCSG(interned_strings).nNumOfElements = 0;
        ZCSG(interned_strings).start =
            (zend_string*)((char*)&ZCSG(interned_strings) +
                sizeof(zend_string_table) +
                ((hash_size + 1) * sizeof(zend_string_table_pos_t))) +
                8;
        ZEND_ASSERT(((uintptr_t)ZCSG(interned_strings).start & 0x7) == 0); /* should be 8 byte aligned */
 
        ZCSG(interned_strings).top =
            ZCSG(interned_strings).start;
        ZCSG(interned_strings).end =
            (zend_string*)((char*)(accel_shared_globals + 1) + /* table data is stored after accel_shared_globals */
                ZCG(accel_directives).interned_strings_buffer * 1024 * 1024);
        ZEND_ASSERT(((uintptr_t)ZCSG(interned_strings).end - (uintptr_t)&ZCSG(interned_strings)) / ZEND_STRING_TABLE_POS_ALIGNMENT < ZEND_STRING_TABLE_POS_MAX);
        ZCSG(interned_strings).saved_top = NULL;
 
        memset((char*)&ZCSG(interned_strings) + sizeof(zend_string_table),
            STRTAB_INVALID_POS,
            (char*)ZCSG(interned_strings).start -
                ((char*)&ZCSG(interned_strings) + sizeof(zend_string_table)));
    } else {
        *STRTAB_HASH_TO_SLOT(&ZCSG(interned_strings), 0) = STRTAB_INVALID_POS;
    }
 
    /* We can reuse init_interned_string_for_php for the "init_existing_interned" case,
     * because the function does not create new interned strings at runtime. */
    zend_interned_strings_set_request_storage_handlers(
        accel_new_interned_string_for_php,
        accel_init_interned_string_for_php,
        accel_init_interned_string_for_php);
 
    zend_reset_cache_vars();
 
    ZCSG(oom_restarts) = 0;
    ZCSG(hash_restarts) = 0;
    ZCSG(manual_restarts) = 0;
 
    ZCSG(accelerator_enabled) = true;
    ZCSG(start_time) = zend_accel_get_time();
    ZCSG(last_restart_time) = 0;
    ZCSG(restart_in_progress) = false;
 
    for (i = 0; i < -HT_MIN_MASK; i++) {
        ZCSG(uninitialized_bucket)[i] = HT_INVALID_IDX;
    }
 
    zend_shared_alloc_unlock();
 
    return SUCCESS;
}
 
static void accel_globals_ctor(zend_accel_globals *accel_globals)
{
#if defined(COMPILE_DL_OPCACHE) && defined(ZTS)
    ZEND_TSRMLS_CACHE_UPDATE();
#endif
    memset(accel_globals, 0, sizeof(zend_accel_globals));
    accel_globals->key = zend_string_alloc(ZCG_KEY_LEN, true);
    GC_MAKE_PERSISTENT_LOCAL(accel_globals->key);
}
 
static void accel_globals_dtor(zend_accel_globals *accel_globals)
{
    zend_string_free(accel_globals->key);
    if (accel_globals->preloaded_internal_run_time_cache) {
        pefree(accel_globals->preloaded_internal_run_time_cache, 1);
    }
}
 
#ifdef HAVE_HUGE_CODE_PAGES
# ifndef _WIN32
#  include <sys/mman.h>
#  ifndef MAP_ANON
#   ifdef MAP_ANONYMOUS
#    define MAP_ANON MAP_ANONYMOUS
#   endif
#  endif
#  ifndef MAP_FAILED
#   define MAP_FAILED ((void*)-1)
#  endif
#  ifdef MAP_ALIGNED_SUPER
#   include <sys/types.h>
#   include <sys/sysctl.h>
#   include <sys/user.h>
#   define MAP_HUGETLB MAP_ALIGNED_SUPER
#  endif
# endif
 
# if defined(MAP_HUGETLB) || defined(MADV_HUGEPAGE)
static zend_result accel_remap_huge_pages(void *start, size_t size, size_t real_size, const char *name, size_t offset)
{
    void *ret = MAP_FAILED;
    void *mem;
 
    mem = mmap(NULL, size,
        PROT_READ | PROT_WRITE,
        MAP_PRIVATE | MAP_ANONYMOUS,
        -1, 0);
    if (mem == MAP_FAILED) {
        zend_error(E_WARNING,
            ACCELERATOR_PRODUCT_NAME " huge_code_pages: mmap failed: %s (%d)",
            strerror(errno), errno);
        return FAILURE;
    }
    memcpy(mem, start, real_size);
 
#  ifdef MAP_HUGETLB
    ret = mmap(start, size,
        PROT_READ | PROT_WRITE | PROT_EXEC,
        MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED | MAP_HUGETLB,
        -1, 0);
#  endif
    if (ret == MAP_FAILED) {
        ret = mmap(start, size,
            PROT_READ | PROT_WRITE | PROT_EXEC,
            MAP_PRIVATE | MAP_ANONYMOUS | MAP_FIXED,
            -1, 0);
        /* this should never happen? */
        ZEND_ASSERT(ret != MAP_FAILED);
#  ifdef MADV_HUGEPAGE
        if (-1 == madvise(start, size, MADV_HUGEPAGE)) {
            memcpy(start, mem, real_size);
            mprotect(start, size, PROT_READ | PROT_EXEC);
            munmap(mem, size);
            zend_error(E_WARNING,
                ACCELERATOR_PRODUCT_NAME " huge_code_pages: madvise(HUGEPAGE) failed: %s (%d)",
                strerror(errno), errno);
            return FAILURE;
        }
#  else
        memcpy(start, mem, real_size);
        mprotect(start, size, PROT_READ | PROT_EXEC);
        munmap(mem, size);
        zend_error(E_WARNING,
            ACCELERATOR_PRODUCT_NAME " huge_code_pages: mmap(HUGETLB) failed: %s (%d)",
            strerror(errno), errno);
        return FAILURE;
#  endif
    }
 
    // Given the MAP_FIXED flag the address can never diverge
    ZEND_ASSERT(ret == start);
    zend_mmap_set_name(start, size, "zend_huge_code_pages");
    memcpy(start, mem, real_size);
    mprotect(start, size, PROT_READ | PROT_EXEC);
 
    munmap(mem, size);
 
    return SUCCESS;
}
 
static void accel_move_code_to_huge_pages(void)
{
#if defined(__linux__)
    FILE *f;
    long unsigned int huge_page_size = 2 * 1024 * 1024;
 
    f = fopen("/proc/self/maps", "r");
    if (f) {
        long unsigned int  start, end, offset, inode;
        char perm[5], dev[10], name[MAXPATHLEN];
        int ret;
        extern char *__progname;
        char buffer[MAXPATHLEN];
 
        while (fgets(buffer, MAXPATHLEN, f)) {
            ret = sscanf(buffer, "%lx-%lx %4s %lx %9s %lu %s\n", &start, &end, perm, &offset, dev, &inode, name);
            if (ret >= 6) {
                /* try to find the php text segment and map it into huge pages
                   Lines without 'name' are going to be skipped */
                if (ret > 6 && perm[0] == 'r' && perm[1] == '-' && perm[2] == 'x' && name[0] == '/' \
                    && strstr(name, __progname)) {
                    long unsigned int  seg_start = ZEND_MM_ALIGNED_SIZE_EX(start, huge_page_size);
                    long unsigned int  seg_end = (end & ~(huge_page_size-1L));
                    long unsigned int  real_end;
 
                    ret = fscanf(f, "%lx-", &start);
                    if (ret == 1 && start == seg_end + huge_page_size) {
                        real_end = end;
                        seg_end = start;
                    } else {
                        real_end = seg_end;
                    }
 
                    if (seg_end > seg_start) {
                        zend_accel_error(ACCEL_LOG_DEBUG, "remap to huge page %lx-%lx %s \n", seg_start, seg_end, name);
                        accel_remap_huge_pages((void*)seg_start, seg_end - seg_start, real_end - seg_start, name, offset + seg_start - start);
                    }
                    break;
                }
            }
        }
        fclose(f);
    }
#elif defined(__FreeBSD__)
    size_t s = 0;
    int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};
    long unsigned int huge_page_size = 2 * 1024 * 1024;
    if (sysctl(mib, 4, NULL, &s, NULL, 0) == 0) {
        s = s * 4 / 3;
        void *addr = mmap(NULL, s, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
        if (addr != MAP_FAILED) {
            if (sysctl(mib, 4, addr, &s, NULL, 0) == 0) {
                uintptr_t start = (uintptr_t)addr;
                uintptr_t end = start + s;
                while (start < end) {
                    struct kinfo_vmentry *entry = (struct kinfo_vmentry *)start;
                    size_t sz = entry->kve_structsize;
                    if (sz == 0) {
                        break;
                    }
                    int permflags = entry->kve_protection;
                    if ((permflags & KVME_PROT_READ) && !(permflags & KVME_PROT_WRITE) &&
                        (permflags & KVME_PROT_EXEC) && entry->kve_path[0] != '\0') {
                        long unsigned int seg_start = ZEND_MM_ALIGNED_SIZE_EX(start, huge_page_size);
                        long unsigned int seg_end = (end & ~(huge_page_size-1L));
                        if (seg_end > seg_start) {
                            zend_accel_error(ACCEL_LOG_DEBUG, "remap to huge page %lx-%lx %s \n", seg_start, seg_end, entry->kve_path);
                            accel_remap_huge_pages((void*)seg_start, seg_end - seg_start, seg_end - seg_start, entry->kve_path, entry->kve_offset + seg_start - start);
                            // First relevant segment found is our binary
                            break;
                        }
                    }
                    start += sz;
                }
            }
            munmap(addr, s);
        }
    }
#endif
}
# else
static void accel_move_code_to_huge_pages(void)
{
    zend_error(E_WARNING, ACCELERATOR_PRODUCT_NAME ": opcache.huge_code_pages has no affect as huge page is not supported");
    return;
}
# endif /* defined(MAP_HUGETLB) || defined(MADV_HUGEPAGE) */
#endif /* HAVE_HUGE_CODE_PAGES */
 
static int accel_startup(zend_extension *extension)
{
#ifdef ZTS
    accel_globals_id = ts_allocate_id(&accel_globals_id, sizeof(zend_accel_globals), (ts_allocate_ctor) accel_globals_ctor, (ts_allocate_dtor) accel_globals_dtor);
#else
    accel_globals_ctor(&accel_globals);
#endif
 
#ifdef HAVE_JIT
    zend_jit_init();
#endif
 
#ifdef ZEND_WIN32
# if !defined(__has_feature) || !__has_feature(address_sanitizer)
    _setmaxstdio(2048); /* The default configuration is limited to 512 stdio files */
# endif
#endif
 
    if (start_accel_module() == FAILURE) {
        accel_startup_ok = false;
        zend_error(E_WARNING, ACCELERATOR_PRODUCT_NAME ": module registration failed!");
        return FAILURE;
    }
 
#ifdef ZEND_WIN32
    if (UNEXPECTED(accel_gen_uname_id() == FAILURE)) {
        zps_startup_failure("Unable to get user name", NULL, accelerator_remove_cb);
        return SUCCESS;
    }
#endif
 
#ifdef HAVE_HUGE_CODE_PAGES
    if (ZCG(accel_directives).huge_code_pages &&
        (strcmp(sapi_module.name, "cli") == 0 ||
         strcmp(sapi_module.name, "cli-server") == 0 ||
         strcmp(sapi_module.name, "cgi-fcgi") == 0 ||
         strcmp(sapi_module.name, "fpm-fcgi") == 0)) {
        accel_move_code_to_huge_pages();
    }
#endif
 
    /* no supported SAPI found - disable acceleration and stop initialization */
    if (accel_find_sapi() == FAILURE) {
        accel_startup_ok = false;
        if (!ZCG(accel_directives).enable_cli &&
            strcmp(sapi_module.name, "cli") == 0) {
            zps_startup_failure("Opcode Caching is disabled for CLI", NULL, accelerator_remove_cb);
        } else {
            zps_startup_failure("Opcode Caching is only supported in Apache, FPM, FastCGI, FrankenPHP, LiteSpeed and uWSGI SAPIs", NULL, accelerator_remove_cb);
        }
        return SUCCESS;
    }
 
    if (ZCG(enabled) == 0) {
        return SUCCESS ;
    }
 
    orig_post_startup_cb = zend_post_startup_cb;
    zend_post_startup_cb = accel_post_startup;
 
    /* Prevent unloading */
    extension->handle = 0;
 
    return SUCCESS;
}
 
static zend_result accel_post_startup(void)
{
    zend_function *func;
    zend_ini_entry *ini_entry;
 
    if (orig_post_startup_cb) {
        zend_result (*cb)(void) = orig_post_startup_cb;
 
        orig_post_startup_cb = NULL;
        if (cb() != SUCCESS) {
            return FAILURE;
        }
    }
 
/********************************************/
/* End of non-SHM dependent initializations */
/********************************************/
    file_cache_only = ZCG(accel_directives).file_cache_only;
    if (!file_cache_only) {
        size_t shm_size = ZCG(accel_directives).memory_consumption;
#ifdef HAVE_JIT
        size_t jit_size = 0;
        bool reattached = false;
 
        if (JIT_G(enabled) && JIT_G(buffer_size)
         && zend_jit_check_support() == SUCCESS) {
            size_t page_size;
 
            page_size = zend_get_page_size();
            if (!page_size || (page_size & (page_size - 1))) {
                zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Failure to initialize shared memory structures - can't get page size.");
                abort();
            }
            jit_size = JIT_G(buffer_size);
            jit_size = ZEND_MM_ALIGNED_SIZE_EX(jit_size, page_size);
            shm_size += jit_size;
        }
 
        switch (zend_shared_alloc_startup(shm_size, jit_size)) {
#else
        switch (zend_shared_alloc_startup(shm_size, 0)) {
#endif
            case ALLOC_SUCCESS:
                if (zend_accel_init_shm() == FAILURE) {
                    accel_startup_ok = false;
                    return FAILURE;
                }
                break;
            case ALLOC_FAILURE:
                accel_startup_ok = false;
                zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Failure to initialize shared memory structures - probably not enough shared memory.");
                return SUCCESS;
            case SUCCESSFULLY_REATTACHED:
#ifdef HAVE_JIT
                reattached = true;
#endif
                zend_shared_alloc_lock();
                accel_shared_globals = (zend_accel_shared_globals *) ZSMMG(app_shared_globals);
                zend_interned_strings_set_request_storage_handlers(
                    accel_new_interned_string_for_php,
                    accel_init_interned_string_for_php,
                    accel_init_interned_string_for_php);
                zend_shared_alloc_unlock();
                break;
            case FAILED_REATTACHED:
                accel_startup_ok = false;
                zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Failure to initialize shared memory structures - cannot reattach to exiting shared memory.");
                return SUCCESS;
                break;
#if ENABLE_FILE_CACHE_FALLBACK
            case ALLOC_FALLBACK:
                zend_shared_alloc_lock();
                file_cache_only = true;
                fallback_process = true;
                zend_shared_alloc_unlock();
                goto file_cache_fallback;
                break;
#endif
        }
 
        /* from this point further, shared memory is supposed to be OK */
 
        /* remember the last restart time in the process memory */
        ZCG(last_restart_time) = ZCSG(last_restart_time);
 
        zend_shared_alloc_lock();
#ifdef HAVE_JIT
        if (JIT_G(enabled)) {
            if (JIT_G(buffer_size) == 0) {
                JIT_G(enabled) = false;
                JIT_G(on) = false;
            } else if (!ZSMMG(reserved)) {
                zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Could not enable JIT: could not use reserved buffer!");
            } else {
                zend_jit_startup(ZSMMG(reserved), jit_size, reattached);
                zend_jit_startup_ok = true;
            }
        }
#endif
        zend_shared_alloc_save_state();
        zend_shared_alloc_unlock();
 
        SHM_PROTECT();
    } else if (!ZCG(accel_directives).file_cache) {
        accel_startup_ok = false;
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "opcache.file_cache_only is set without a proper setting of opcache.file_cache");
        return SUCCESS;
    } else {
#ifdef HAVE_JIT
        JIT_G(enabled) = false;
        JIT_G(on) = false;
#endif
        accel_shared_globals = calloc(1, sizeof(zend_accel_shared_globals));
    }
#if ENABLE_FILE_CACHE_FALLBACK
file_cache_fallback:
#endif
 
    /* Override compiler */
    accelerator_orig_compile_file = zend_compile_file;
    zend_compile_file = persistent_compile_file;
 
    /* Override stream opener function (to eliminate open() call caused by
     * include/require statements ) */
    accelerator_orig_zend_stream_open_function = zend_stream_open_function;
    zend_stream_open_function = persistent_stream_open_function;
 
    /* Override path resolver function (to eliminate stat() calls caused by
     * include_once/require_once statements */
    accelerator_orig_zend_resolve_path = zend_resolve_path;
    zend_resolve_path = persistent_zend_resolve_path;
 
    /* Override chdir() function */
    if ((func = zend_hash_str_find_ptr(CG(function_table), "chdir", sizeof("chdir")-1)) != NULL &&
        func->type == ZEND_INTERNAL_FUNCTION) {
        orig_chdir = func->internal_function.handler;
        func->internal_function.handler = ZEND_FN(accel_chdir);
    }
    ZCG(cwd) = NULL;
    ZCG(include_path) = NULL;
 
    /* Override "include_path" modifier callback */
    if ((ini_entry = zend_hash_str_find_ptr(EG(ini_directives), "include_path", sizeof("include_path")-1)) != NULL) {
        ZCG(include_path) = ini_entry->value;
        orig_include_path_on_modify = ini_entry->on_modify;
        ini_entry->on_modify = accel_include_path_on_modify;
    }
 
    accel_startup_ok = true;
 
    /* Override file_exists(), is_file() and is_readable() */
    zend_accel_override_file_functions();
 
    /* Load black list */
    accel_blacklist.entries = NULL;
    if (ZCG(enabled) && accel_startup_ok &&
        ZCG(accel_directives).user_blacklist_filename &&
        *ZCG(accel_directives.user_blacklist_filename)) {
        zend_accel_blacklist_init(&accel_blacklist);
        zend_accel_blacklist_load(&accel_blacklist, ZCG(accel_directives.user_blacklist_filename));
    }
 
    if (!file_cache_only && ZCG(accel_directives).interned_strings_buffer) {
        accel_use_shm_interned_strings();
    }
 
    if (accel_finish_startup() != SUCCESS) {
        return FAILURE;
    }
 
    if (ZCG(enabled) && accel_startup_ok) {
        /* Override inheritance cache callbaks */
        accelerator_orig_inheritance_cache_get = zend_inheritance_cache_get;
        accelerator_orig_inheritance_cache_add = zend_inheritance_cache_add;
        zend_inheritance_cache_get = zend_accel_inheritance_cache_get;
        zend_inheritance_cache_add = zend_accel_inheritance_cache_add;
    }
 
    return SUCCESS;
}
 
static void (*orig_post_shutdown_cb)(void);
 
static void accel_post_shutdown(void)
{
    zend_shared_alloc_shutdown();
}
 
void accel_shutdown(void)
{
    zend_ini_entry *ini_entry;
    bool _file_cache_only = false;
 
#ifdef HAVE_JIT
    zend_jit_shutdown();
#endif
 
    zend_accel_blacklist_shutdown(&accel_blacklist);
 
    if (!ZCG(enabled) || !accel_startup_ok) {
#ifdef ZTS
        ts_free_id(accel_globals_id);
#else
        accel_globals_dtor(&accel_globals);
#endif
        return;
    }
 
    if (ZCSG(preload_script)) {
        preload_shutdown();
    }
 
    _file_cache_only = file_cache_only;
 
    accel_reset_pcre_cache();
 
#ifdef ZTS
    ts_free_id(accel_globals_id);
#else
    accel_globals_dtor(&accel_globals);
#endif
 
    if (!_file_cache_only) {
        /* Delay SHM detach */
        orig_post_shutdown_cb = zend_post_shutdown_cb;
        zend_post_shutdown_cb = accel_post_shutdown;
    }
 
    zend_compile_file = accelerator_orig_compile_file;
    zend_inheritance_cache_get = accelerator_orig_inheritance_cache_get;
    zend_inheritance_cache_add = accelerator_orig_inheritance_cache_add;
 
    if ((ini_entry = zend_hash_str_find_ptr(EG(ini_directives), "include_path", sizeof("include_path")-1)) != NULL) {
        ini_entry->on_modify = orig_include_path_on_modify;
    }
}
 
void zend_accel_schedule_restart(zend_accel_restart_reason reason)
{
    const char *zend_accel_restart_reason_text[ACCEL_RESTART_USER + 1] = {
        "out of memory",
        "hash overflow",
        "user",
    };
 
    if (ZCSG(restart_pending)) {
        /* don't schedule twice */
        return;
    }
 
    if (UNEXPECTED(zend_accel_schedule_restart_hook)) {
        zend_accel_schedule_restart_hook(reason);
    }
 
    zend_accel_error(ACCEL_LOG_DEBUG, "Restart Scheduled! Reason: %s",
            zend_accel_restart_reason_text[reason]);
 
    HANDLE_BLOCK_INTERRUPTIONS();
    SHM_UNPROTECT();
    ZCSG(restart_pending) = true;
    ZCSG(restart_reason) = reason;
    ZCSG(cache_status_before_restart) = ZCSG(accelerator_enabled);
    ZCSG(accelerator_enabled) = false;
 
    if (ZCG(accel_directives).force_restart_timeout) {
        ZCSG(force_restart_time) = zend_accel_get_time() + ZCG(accel_directives).force_restart_timeout;
    } else {
        ZCSG(force_restart_time) = 0;
    }
    SHM_PROTECT();
    HANDLE_UNBLOCK_INTERRUPTIONS();
}
 
static void accel_deactivate_now(void)
{
    /* this is needed because on WIN32 lock is not decreased unless ZCG(counted) is set */
#ifdef ZEND_WIN32
    ZCG(counted) = true;
#endif
    accel_deactivate_sub();
}
 
/* ensures it is OK to read SHM
    if it's not OK (restart in progress) returns FAILURE
    if OK returns SUCCESS
    MUST call accelerator_shm_read_unlock after done lock operations
*/
zend_result accelerator_shm_read_lock(void)
{
    if (ZCG(counted)) {
        /* counted means we are holding read lock for SHM, so that nothing bad can happen */
        return SUCCESS;
    } else {
        /* here accelerator is active but we do not hold SHM lock. This means restart was scheduled
            or is in progress now */
        if (accel_activate_add() == FAILURE) { /* acquire usage lock */
            return FAILURE;
        }
        /* Now if we weren't inside restart, restart would not begin until we remove usage lock */
        if (ZCSG(restart_in_progress)) {
            /* we already were inside restart this means it's not safe to touch shm */
            accel_deactivate_now(); /* drop usage lock */
            return FAILURE;
        }
        ZCG(counted) = true;
    }
    return SUCCESS;
}
 
/* must be called ONLY after SUCCESSFUL accelerator_shm_read_lock */
void accelerator_shm_read_unlock(void)
{
    if (!ZCG(counted)) {
        /* counted is false - meaning we had to readlock manually, release readlock now */
        accel_deactivate_now();
    }
}
 
/* Preloading */
static HashTable *preload_scripts = NULL;
static zend_op_array *(*preload_orig_compile_file)(zend_file_handle *file_handle, int type);
 
static void preload_shutdown(void)
{
    zval *zv;
 
#if 0
    if (EG(zend_constants)) {
        ZEND_HASH_MAP_REVERSE_FOREACH_VAL(EG(zend_constants), zv) {
            zend_constant *c = Z_PTR_P(zv);
            if (ZEND_CONSTANT_FLAGS(c) & CONST_PERSISTENT) {
                break;
            }
        } ZEND_HASH_MAP_FOREACH_END_DEL();
    }
#endif
 
    if (EG(function_table)) {
        ZEND_HASH_MAP_REVERSE_FOREACH_VAL(EG(function_table), zv) {
            zend_function *func = Z_PTR_P(zv);
            if (func->type == ZEND_INTERNAL_FUNCTION) {
                break;
            }
        } ZEND_HASH_MAP_FOREACH_END_DEL();
    }
 
    if (EG(class_table)) {
        ZEND_HASH_MAP_REVERSE_FOREACH_VAL(EG(class_table), zv) {
            zend_class_entry *ce = Z_PTR_P(zv);
            if (ce->type == ZEND_INTERNAL_CLASS && Z_TYPE_P(zv) != IS_ALIAS_PTR) {
                break;
            }
        } ZEND_HASH_MAP_FOREACH_END_DEL();
    }
}
 
static void preload_activate(void)
{
    if (ZCSG(preload_script)->ping_auto_globals_mask & ~ZCG(auto_globals_mask)) {
        zend_accel_set_auto_globals(ZCSG(preload_script)->ping_auto_globals_mask & ~ZCG(auto_globals_mask));
    }
}
 
static void preload_restart(void)
{
    zend_accel_hash_update(&ZCSG(hash), ZCSG(preload_script)->script.filename, 0, ZCSG(preload_script));
    if (ZCSG(saved_scripts)) {
        zend_persistent_script **p = ZCSG(saved_scripts);
        while (*p) {
            zend_accel_hash_update(&ZCSG(hash), (*p)->script.filename, 0, *p);
            p++;
        }
    }
}
 
static size_t preload_try_strip_filename(zend_string *filename) {
    /*FIXME: better way to handle eval()'d code? see COMPILED_STRING_DESCRIPTION_FORMAT */
    if (ZSTR_LEN(filename) > sizeof(" eval()'d code")
        && *(ZSTR_VAL(filename) + ZSTR_LEN(filename) - sizeof(" eval()'d code")) == ':') {
        const char *cfilename = ZSTR_VAL(filename);
        size_t cfilenamelen = ZSTR_LEN(filename) - sizeof(" eval()'d code") - 1 /*:*/;
        while (cfilenamelen && cfilename[--cfilenamelen] != '(');
        return cfilenamelen;
    }
    return 0;
}
 
static void preload_move_user_functions(HashTable *src, HashTable *dst)
{
    Bucket *p;
    dtor_func_t orig_dtor = src->pDestructor;
    zend_string *filename = NULL;
    bool copy = false;
 
    src->pDestructor = NULL;
    zend_hash_extend(dst, dst->nNumUsed + src->nNumUsed, 0);
    ZEND_HASH_MAP_REVERSE_FOREACH_BUCKET(src, p) {
        zend_function *function = Z_PTR(p->val);
 
        if (EXPECTED(function->type == ZEND_USER_FUNCTION)) {
            if (function->op_array.filename != filename) {
                filename = function->op_array.filename;
                if (filename) {
                    if (!(copy = zend_hash_exists(preload_scripts, filename))) {
                        size_t eval_len = preload_try_strip_filename(filename);
                        if (eval_len) {
                            copy = zend_hash_str_exists(preload_scripts, ZSTR_VAL(filename), eval_len);
                        }
                    }
                } else {
                    copy = false;
                }
            }
            if (copy) {
                _zend_hash_append_ptr(dst, p->key, function);
            } else {
                orig_dtor(&p->val);
            }
            zend_hash_del_bucket(src, p);
        } else {
            break;
        }
    } ZEND_HASH_FOREACH_END();
    src->pDestructor = orig_dtor;
}
 
static void preload_move_user_classes(HashTable *src, HashTable *dst)
{
    Bucket *p;
    dtor_func_t orig_dtor = src->pDestructor;
    zend_string *filename = NULL;
    bool copy = false;
 
    src->pDestructor = NULL;
    zend_hash_extend(dst, dst->nNumUsed + src->nNumUsed, 0);
    ZEND_HASH_MAP_FOREACH_BUCKET_FROM(src, p, EG(persistent_classes_count)) {
        zend_class_entry *ce = Z_PTR(p->val);
 
        /* Possible with internal class aliases */
        if (ce->type == ZEND_INTERNAL_CLASS) {
            ZEND_ASSERT(Z_TYPE(p->val) == IS_ALIAS_PTR);
            _zend_hash_append(dst, p->key, &p->val);
            zend_hash_del_bucket(src, p);
            continue;
        }
 
        if (ce->info.user.filename != filename) {
            filename = ce->info.user.filename;
            if (filename) {
                if (!(copy = zend_hash_exists(preload_scripts, filename))) {
                    size_t eval_len = preload_try_strip_filename(filename);
                    if (eval_len) {
                        copy = zend_hash_str_exists(preload_scripts, ZSTR_VAL(filename), eval_len);
                    }
                }
            } else {
                copy = false;
            }
        }
        if (copy) {
            _zend_hash_append(dst, p->key, &p->val);
        } else {
            orig_dtor(&p->val);
        }
        zend_hash_del_bucket(src, p);
    } ZEND_HASH_FOREACH_END();
    src->pDestructor = orig_dtor;
}
 
static zend_op_array *preload_compile_file(zend_file_handle *file_handle, int type)
{
    zend_op_array *op_array = preload_orig_compile_file(file_handle, type);
 
    if (op_array && op_array->refcount) {
        zend_persistent_script *script;
 
        script = create_persistent_script();
        script->script.filename = zend_string_copy(op_array->filename);
        zend_string_hash_val(script->script.filename);
        script->script.main_op_array = *op_array;
 
//???       efree(op_array->refcount);
        op_array->refcount = NULL;
 
        zend_hash_add_ptr(preload_scripts, script->script.filename, script);
    }
 
    return op_array;
}
 
static void preload_sort_classes(void *base, size_t count, size_t siz, compare_func_t compare, swap_func_t swp)
{
    Bucket *b1 = base;
    Bucket *b2;
    Bucket *end = b1 + count;
    Bucket tmp;
    zend_class_entry *ce, *p;
 
    while (b1 < end) {
try_again:
        ce = (zend_class_entry*)Z_PTR(b1->val);
        if (ce->parent && (ce->ce_flags & ZEND_ACC_LINKED)) {
            p = ce->parent;
            if (p->type == ZEND_USER_CLASS) {
                b2 = b1 + 1;
                while (b2 < end) {
                    if (p ==  Z_PTR(b2->val)) {
                        tmp = *b1;
                        *b1 = *b2;
                        *b2 = tmp;
                        goto try_again;
                    }
                    b2++;
                }
            }
        }
        if (ce->num_interfaces && (ce->ce_flags & ZEND_ACC_LINKED)) {
            uint32_t i = 0;
            for (i = 0; i < ce->num_interfaces; i++) {
                p = ce->interfaces[i];
                if (p->type == ZEND_USER_CLASS) {
                    b2 = b1 + 1;
                    while (b2 < end) {
                        if (p ==  Z_PTR(b2->val)) {
                            tmp = *b1;
                            *b1 = *b2;
                            *b2 = tmp;
                            goto try_again;
                        }
                        b2++;
                    }
                }
            }
        }
        b1++;
    }
}
 
typedef struct {
    const char *kind;
    const char *name;
} preload_error;
 
static zend_result preload_resolve_deps(preload_error *error, const zend_class_entry *ce)
{
    memset(error, 0, sizeof(preload_error));
 
    if (ce->parent_name) {
        zend_string *key = zend_string_tolower(ce->parent_name);
        zend_class_entry *parent = zend_hash_find_ptr(EG(class_table), key);
        zend_string_release(key);
        if (!parent) {
            error->kind = "Unknown parent ";
            error->name = ZSTR_VAL(ce->parent_name);
            return FAILURE;
        }
    }
 
    if (ce->num_interfaces) {
        for (uint32_t i = 0; i < ce->num_interfaces; i++) {
            zend_class_entry *interface =
                zend_hash_find_ptr(EG(class_table), ce->interface_names[i].lc_name);
            if (!interface) {
                error->kind = "Unknown interface ";
                error->name = ZSTR_VAL(ce->interface_names[i].name);
                return FAILURE;
            }
        }
    }
 
    if (ce->num_traits) {
        for (uint32_t i = 0; i < ce->num_traits; i++) {
            zend_class_entry *trait =
                zend_hash_find_ptr(EG(class_table), ce->trait_names[i].lc_name);
            if (!trait) {
                error->kind = "Unknown trait ";
                error->name = ZSTR_VAL(ce->trait_names[i].name);
                return FAILURE;
            }
        }
    }
 
    return SUCCESS;
}
 
static bool preload_try_resolve_constants(zend_class_entry *ce)
{
    bool ok, changed, was_changed = false;
    zend_class_constant *c;
    zval *val;
    zend_string *key;
 
    EG(exception) = (void*)(uintptr_t)-1; /* prevent error reporting */
    do {
        ok = true;
        changed = false;
        ZEND_HASH_MAP_FOREACH_STR_KEY_PTR(&ce->constants_table, key, c) {
            val = &c->value;
            if (Z_TYPE_P(val) == IS_CONSTANT_AST) {
                if (EXPECTED(zend_update_class_constant(c, key, c->ce) == SUCCESS)) {
                    was_changed = changed = true;
                } else {
                    ok = false;
                }
            }
        } ZEND_HASH_FOREACH_END();
        if (ok) {
            ce->ce_flags &= ~ZEND_ACC_HAS_AST_CONSTANTS;
        }
        if (ce->default_properties_count) {
            uint32_t i;
            bool resolved = true;
 
            for (i = 0; i < ce->default_properties_count; i++) {
                zend_property_info *prop = ce->properties_info_table[i];
                if (!prop) {
                    continue;
                }
 
                val = &ce->default_properties_table[OBJ_PROP_TO_NUM(prop->offset)];
                if (Z_TYPE_P(val) == IS_CONSTANT_AST) {
                    if (UNEXPECTED(zval_update_constant_ex(val, prop->ce) != SUCCESS)) {
                        resolved = ok = false;
                    }
                }
            }
            if (resolved) {
                ce->ce_flags &= ~ZEND_ACC_HAS_AST_PROPERTIES;
            }
        }
        if (ce->default_static_members_count) {
            uint32_t count = ce->parent ? ce->default_static_members_count - ce->parent->default_static_members_count : ce->default_static_members_count;
            bool resolved = true;
 
            val = ce->default_static_members_table + ce->default_static_members_count - 1;
            while (count) {
                if (Z_TYPE_P(val) == IS_CONSTANT_AST) {
                    if (UNEXPECTED(zval_update_constant_ex(val, ce) != SUCCESS)) {
                        resolved = ok = false;
                    }
                }
                val--;
                count--;
            }
            if (resolved) {
                ce->ce_flags &= ~ZEND_ACC_HAS_AST_STATICS;
            }
        }
    } while (changed && !ok);
    EG(exception) = NULL;
    CG(in_compilation) = false;
 
    if (ok) {
        ce->ce_flags |= ZEND_ACC_CONSTANTS_UPDATED;
    }
 
    return ok || was_changed;
}
 
static void (*orig_error_cb)(int type, zend_string *error_filename, const uint32_t error_lineno, zend_string *message);
 
static void preload_error_cb(int type, zend_string *error_filename, const uint32_t error_lineno, zend_string *message)
{
    /* Suppress printing of the error, only bail out for fatal errors. */
    if (type & E_FATAL_ERRORS) {
        zend_bailout();
    }
}
 
/* Remove DECLARE opcodes and dynamic defs. */
static void preload_remove_declares(zend_op_array *op_array)
{
    zend_op *opline = op_array->opcodes;
    zend_op *end = opline + op_array->last;
    uint32_t skip_dynamic_func_count = 0;
    zend_string *key;
    zend_op_array *func;
 
    while (opline != end) {
        switch (opline->opcode) {
            case ZEND_DECLARE_CLASS:
            case ZEND_DECLARE_CLASS_DELAYED:
                key = Z_STR_P(RT_CONSTANT(opline, opline->op1) + 1);
                if (!zend_hash_exists(CG(class_table), key)) {
                    MAKE_NOP(opline);
                }
                break;
            case ZEND_DECLARE_FUNCTION:
                opline->op2.num -= skip_dynamic_func_count;
                key = Z_STR_P(RT_CONSTANT(opline, opline->op1));
                func = zend_hash_find_ptr(EG(function_table), key);
                if (func && func == op_array->dynamic_func_defs[opline->op2.num]) {
                    zend_op_array **dynamic_func_defs;
 
                    op_array->num_dynamic_func_defs--;
                    if (op_array->num_dynamic_func_defs == 0) {
                        dynamic_func_defs = NULL;
                    } else {
                        dynamic_func_defs = emalloc(sizeof(zend_op_array*) * op_array->num_dynamic_func_defs);
                        if (opline->op2.num > 0) {
                            memcpy(
                                dynamic_func_defs,
                                op_array->dynamic_func_defs,
                                sizeof(zend_op_array*) * opline->op2.num);
                        }
                        if (op_array->num_dynamic_func_defs - opline->op2.num > 0) {
                            memcpy(
                                dynamic_func_defs + opline->op2.num,
                                op_array->dynamic_func_defs + (opline->op2.num + 1),
                                sizeof(zend_op_array*) * (op_array->num_dynamic_func_defs - opline->op2.num));
                        }
                    }
                    efree(op_array->dynamic_func_defs);
                    op_array->dynamic_func_defs = dynamic_func_defs;
                    skip_dynamic_func_count++;
                    MAKE_NOP(opline);
                }
                break;
            case ZEND_DECLARE_LAMBDA_FUNCTION:
                opline->op2.num -= skip_dynamic_func_count;
                break;
        }
        opline++;
    }
}
 
static void preload_link(void)
{
    zval *zv;
    zend_persistent_script *script;
    zend_class_entry *ce;
    zend_string *key;
    bool changed;
 
    HashTable errors;
    zend_hash_init(&errors, 0, NULL, NULL, 0);
 
    /* Resolve class dependencies */
    do {
        changed = false;
 
        ZEND_HASH_MAP_FOREACH_STR_KEY_VAL_FROM(EG(class_table), key, zv, EG(persistent_classes_count)) {
            ce = Z_PTR_P(zv);
 
            /* Possible with internal class aliases */
            if (ce->type == ZEND_INTERNAL_CLASS) {
                ZEND_ASSERT(Z_TYPE_P(zv) == IS_ALIAS_PTR);
                continue;
            }
 
            if (!(ce->ce_flags & (ZEND_ACC_TOP_LEVEL|ZEND_ACC_ANON_CLASS))
                    || (ce->ce_flags & ZEND_ACC_LINKED)) {
                continue;
            }
 
            zend_string *lcname = zend_string_tolower(ce->name);
            if (!(ce->ce_flags & ZEND_ACC_ANON_CLASS)) {
                if (zend_hash_exists(EG(class_table), lcname)) {
                    zend_string_release(lcname);
                    continue;
                }
            }
 
            preload_error error_info;
            if (preload_resolve_deps(&error_info, ce) == FAILURE) {
                zend_string_release(lcname);
                continue;
            }
 
            zv = zend_hash_set_bucket_key(EG(class_table), (Bucket*)zv, lcname);
            ZEND_ASSERT(zv && "We already checked above that the class doesn't exist yet");
 
            /* Set the FILE_CACHED flag to force a lazy load, and the CACHED flag to
             * prevent freeing of interface names. */
            void *checkpoint = zend_arena_checkpoint(CG(arena));
            zend_class_entry *orig_ce = ce;
            uint32_t temporary_flags = ZEND_ACC_FILE_CACHED|ZEND_ACC_CACHED;
            ce->ce_flags |= temporary_flags;
            if (ce->parent_name) {
                zend_string_addref(ce->parent_name);
            }
 
            /* Record and suppress errors during inheritance. */
            orig_error_cb = zend_error_cb;
            zend_error_cb = preload_error_cb;
            zend_begin_record_errors();
 
            /* Set filename & lineno information for inheritance errors */
            CG(in_compilation) = true;
            CG(compiled_filename) = ce->info.user.filename;
            CG(zend_lineno) = ce->info.user.line_start;
            zend_try {
                ce = zend_do_link_class(ce, NULL, lcname);
                if (!ce) {
                    ZEND_ASSERT(0 && "Class linking failed?");
                }
                ce->ce_flags &= ~temporary_flags;
                changed = true;
 
                /* Inheritance successful, print out any warnings. */
                zend_error_cb = orig_error_cb;
                zend_emit_recorded_errors();
            } zend_catch {
                /* Clear variance obligations that were left behind on bailout. */
                if (CG(delayed_variance_obligations)) {
                    zend_hash_index_del(
                        CG(delayed_variance_obligations), (uintptr_t) Z_CE_P(zv));
                }
 
                /* Restore the original class. */
                zv = zend_hash_set_bucket_key(EG(class_table), (Bucket*)zv, key);
                Z_CE_P(zv) = orig_ce;
                orig_ce->ce_flags &= ~temporary_flags;
                zend_arena_release(&CG(arena), checkpoint);
 
                /* Remember the last error. */
                zend_error_cb = orig_error_cb;
                EG(record_errors) = false;
                ZEND_ASSERT(EG(num_errors) > 0);
                zend_hash_update_ptr(&errors, key, EG(errors)[EG(num_errors)-1]);
                EG(num_errors)--;
            } zend_end_try();
            CG(in_compilation) = false;
            CG(compiled_filename) = NULL;
            zend_free_recorded_errors();
            zend_string_release(lcname);
        } ZEND_HASH_FOREACH_END();
    } while (changed);
 
    do {
        changed = false;
 
        ZEND_HASH_MAP_REVERSE_FOREACH_VAL(EG(class_table), zv) {
            ce = Z_PTR_P(zv);
 
            /* Possible with internal class aliases */
            if (ce->type == ZEND_INTERNAL_CLASS) {
                if (Z_TYPE_P(zv) != IS_ALIAS_PTR) {
                    break; /* can stop already */
                }
                continue;
            }
 
            if ((ce->ce_flags & ZEND_ACC_LINKED) && !(ce->ce_flags & ZEND_ACC_CONSTANTS_UPDATED)) {
                if (!(ce->ce_flags & ZEND_ACC_TRAIT)) { /* don't update traits */
                    CG(in_compilation) = true; /* prevent autoloading */
                    if (preload_try_resolve_constants(ce)) {
                        changed = true;
                    }
                    CG(in_compilation) = false;
                }
            }
        } ZEND_HASH_FOREACH_END();
    } while (changed);
 
    /* Warn for classes that could not be linked. */
    ZEND_HASH_MAP_FOREACH_STR_KEY_VAL_FROM(
            EG(class_table), key, zv, EG(persistent_classes_count)) {
        ce = Z_PTR_P(zv);
 
        /* Possible with internal class aliases */
        if (ce->type == ZEND_INTERNAL_CLASS) {
            ZEND_ASSERT(Z_TYPE_P(zv) == IS_ALIAS_PTR);
            continue;
        }
 
        if ((ce->ce_flags & (ZEND_ACC_TOP_LEVEL|ZEND_ACC_ANON_CLASS))
                && !(ce->ce_flags & ZEND_ACC_LINKED)) {
            zend_string *lcname = zend_string_tolower(ce->name);
            preload_error error;
            if (!(ce->ce_flags & ZEND_ACC_ANON_CLASS)
             && zend_hash_exists(EG(class_table), lcname)) {
                zend_error_at(
                    E_WARNING, ce->info.user.filename, ce->info.user.line_start,
                    "Can't preload already declared class %s", ZSTR_VAL(ce->name));
            } else if (preload_resolve_deps(&error, ce) == FAILURE) {
                zend_error_at(
                    E_WARNING, ce->info.user.filename, ce->info.user.line_start,
                    "Can't preload unlinked class %s: %s%s",
                    ZSTR_VAL(ce->name), error.kind, error.name);
            } else {
                zend_error_info *error = zend_hash_find_ptr(&errors, key);
                zend_error_at(
                    E_WARNING, error->filename, error->lineno,
                    "Can't preload unlinked class %s: %s",
                    ZSTR_VAL(ce->name), ZSTR_VAL(error->message));
            }
            zend_string_release(lcname);
        }
    } ZEND_HASH_FOREACH_END();
 
    zend_hash_destroy(&errors);
 
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
        zend_op_array *op_array = &script->script.main_op_array;
        preload_remove_declares(op_array);
 
        if (op_array->fn_flags & ZEND_ACC_EARLY_BINDING) {
            zend_accel_free_delayed_early_binding_list(script);
            zend_accel_build_delayed_early_binding_list(script);
            if (!script->num_early_bindings) {
                op_array->fn_flags &= ~ZEND_ACC_EARLY_BINDING;
            }
        }
    } ZEND_HASH_FOREACH_END();
 
    /* Dynamic defs inside functions and methods need to be removed as well. */
    zend_op_array *op_array;
    ZEND_HASH_MAP_FOREACH_PTR_FROM(EG(function_table), op_array, EG(persistent_functions_count)) {
        ZEND_ASSERT(op_array->type == ZEND_USER_FUNCTION);
        preload_remove_declares(op_array);
    } ZEND_HASH_FOREACH_END();
    ZEND_HASH_MAP_FOREACH_PTR_FROM(EG(class_table), ce, EG(persistent_classes_count)) {
        ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
            if (op_array->type == ZEND_USER_FUNCTION) {
                preload_remove_declares(op_array);
            }
        } ZEND_HASH_FOREACH_END();
    } ZEND_HASH_FOREACH_END();
}
 
static zend_string *preload_resolve_path(zend_string *filename)
{
    if (php_is_stream_path(ZSTR_VAL(filename))) {
        return NULL;
    }
    return zend_resolve_path(filename);
}
 
static void preload_remove_empty_includes(void)
{
    zend_persistent_script *script;
    bool changed;
 
    /* mark all as empty */
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
        script->empty = true;
    } ZEND_HASH_FOREACH_END();
 
    /* find non empty scripts */
    do {
        changed = false;
        ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
            if (script->empty) {
                bool empty = true;
                zend_op *opline = script->script.main_op_array.opcodes;
                zend_op *end = opline + script->script.main_op_array.last;
 
                while (opline < end) {
                    if (opline->opcode == ZEND_INCLUDE_OR_EVAL &&
                        opline->extended_value != ZEND_EVAL &&
                        opline->op1_type == IS_CONST &&
                        Z_TYPE_P(RT_CONSTANT(opline, opline->op1)) == IS_STRING &&
                        opline->result_type == IS_UNUSED) {
 
                        zend_string *resolved_path = preload_resolve_path(Z_STR_P(RT_CONSTANT(opline, opline->op1)));
 
                        if (resolved_path) {
                            zend_persistent_script *incl = zend_hash_find_ptr(preload_scripts, resolved_path);
                            zend_string_release(resolved_path);
                            if (!incl || !incl->empty) {
                                empty = false;
                                break;
                            }
                        } else {
                            empty = false;
                            break;
                        }
                    } else if (opline->opcode != ZEND_NOP &&
                               opline->opcode != ZEND_RETURN &&
                               opline->opcode != ZEND_HANDLE_EXCEPTION) {
                        empty = false;
                        break;
                    }
                    opline++;
                }
                if (!empty) {
                    script->empty = false;
                    changed = true;
                }
            }
        } ZEND_HASH_FOREACH_END();
    } while (changed);
 
    /* remove empty includes */
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
        zend_op *opline = script->script.main_op_array.opcodes;
        zend_op *end = opline + script->script.main_op_array.last;
 
        while (opline < end) {
            if (opline->opcode == ZEND_INCLUDE_OR_EVAL &&
                opline->extended_value != ZEND_EVAL &&
                opline->op1_type == IS_CONST &&
                Z_TYPE_P(RT_CONSTANT(opline, opline->op1)) == IS_STRING) {
 
                zend_string *resolved_path = preload_resolve_path(Z_STR_P(RT_CONSTANT(opline, opline->op1)));
 
                if (resolved_path) {
                    zend_persistent_script *incl = zend_hash_find_ptr(preload_scripts, resolved_path);
                    if (incl && incl->empty && opline->result_type == IS_UNUSED) {
                        MAKE_NOP(opline);
                    } else {
                        if (!IS_ABSOLUTE_PATH(Z_STRVAL_P(RT_CONSTANT(opline, opline->op1)), Z_STRLEN_P(RT_CONSTANT(opline, opline->op1)))) {
                            /* replace relative patch with absolute one */
                            zend_string_release(Z_STR_P(RT_CONSTANT(opline, opline->op1)));
                            ZVAL_STR_COPY(RT_CONSTANT(opline, opline->op1), resolved_path);
                        }
                    }
                    zend_string_release(resolved_path);
                }
            }
            opline++;
        }
    } ZEND_HASH_FOREACH_END();
}
 
static void preload_register_trait_methods(zend_class_entry *ce) {
    zend_op_array *op_array;
    zend_property_info *info;
 
    ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
        if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
            ZEND_ASSERT(op_array->refcount && "Must have refcount pointer");
            zend_shared_alloc_register_xlat_entry(op_array->refcount, op_array);
        }
    } ZEND_HASH_FOREACH_END();
 
    if (ce->num_hooked_props > 0) {
        ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, info) {
            if (info->hooks) {
                for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
                    if (info->hooks[i]) {
                        op_array = &info->hooks[i]->op_array;
                        if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
                            ZEND_ASSERT(op_array->refcount && "Must have refcount pointer");
                            zend_shared_alloc_register_xlat_entry(op_array->refcount, op_array);
                        }
                    }
                }
            }
        } ZEND_HASH_FOREACH_END();
    }
}
 
static void preload_fix_trait_op_array(zend_op_array *op_array)
{
    if (!(op_array->fn_flags & ZEND_ACC_TRAIT_CLONE)) {
        return;
    }
 
    zend_op_array *orig_op_array = zend_shared_alloc_get_xlat_entry(op_array->refcount);
    ZEND_ASSERT(orig_op_array && "Must be in xlat table");
 
    zend_string *function_name = op_array->function_name;
    zend_class_entry *scope = op_array->scope;
    uint32_t fn_flags = op_array->fn_flags;
    zend_function *prototype = op_array->prototype;
    HashTable *ht = op_array->static_variables;
    *op_array = *orig_op_array;
    op_array->function_name = function_name;
    op_array->scope = scope;
    op_array->fn_flags = fn_flags;
    op_array->prototype = prototype;
    op_array->static_variables = ht;
}
 
static void preload_fix_trait_methods(zend_class_entry *ce)
{
    zend_op_array *op_array;
 
    ZEND_HASH_MAP_FOREACH_PTR(&ce->function_table, op_array) {
        preload_fix_trait_op_array(op_array);
    } ZEND_HASH_FOREACH_END();
 
    if (ce->num_hooked_props > 0) {
        zend_property_info *info;
        ZEND_HASH_MAP_FOREACH_PTR(&ce->properties_info, info) {
            if (info->hooks) {
                for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
                    if (info->hooks[i]) {
                        op_array = &info->hooks[i]->op_array;
                        preload_fix_trait_op_array(op_array);
                    }
                }
            }
        } ZEND_HASH_FOREACH_END();
    }
}
 
static void preload_optimize(zend_persistent_script *script)
{
    zend_class_entry *ce;
    zend_persistent_script *tmp_script;
 
    zend_shared_alloc_init_xlat_table();
 
    ZEND_HASH_MAP_FOREACH_PTR(&script->script.class_table, ce) {
        if (ce->ce_flags & ZEND_ACC_TRAIT) {
            preload_register_trait_methods(ce);
        }
    } ZEND_HASH_FOREACH_END();
 
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, tmp_script) {
        ZEND_HASH_MAP_FOREACH_PTR(&tmp_script->script.class_table, ce) {
            if (ce->ce_flags & ZEND_ACC_TRAIT) {
                preload_register_trait_methods(ce);
            }
        } ZEND_HASH_FOREACH_END();
    } ZEND_HASH_FOREACH_END();
 
    zend_optimize_script(&script->script, ZCG(accel_directives).optimization_level, ZCG(accel_directives).opt_debug_level);
    zend_accel_finalize_delayed_early_binding_list(script);
 
    ZEND_HASH_MAP_FOREACH_PTR(&script->script.class_table, ce) {
        preload_fix_trait_methods(ce);
    } ZEND_HASH_FOREACH_END();
 
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
        ZEND_HASH_MAP_FOREACH_PTR(&script->script.class_table, ce) {
            preload_fix_trait_methods(ce);
        } ZEND_HASH_FOREACH_END();
    } ZEND_HASH_FOREACH_END();
 
    zend_shared_alloc_destroy_xlat_table();
 
    ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
        zend_optimize_script(&script->script, ZCG(accel_directives).optimization_level, ZCG(accel_directives).opt_debug_level);
        zend_accel_finalize_delayed_early_binding_list(script);
    } ZEND_HASH_FOREACH_END();
}
 
static zend_persistent_script* preload_script_in_shared_memory(zend_persistent_script *new_persistent_script)
{
    zend_accel_hash_entry *bucket;
    uint32_t memory_used;
    uint32_t checkpoint;
 
    if (zend_accel_hash_is_full(&ZCSG(hash))) {
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Not enough entries in hash table for preloading. Consider increasing the value for the opcache.max_accelerated_files directive in php.ini.");
        return NULL;
    }
 
    checkpoint = zend_shared_alloc_checkpoint_xlat_table();
 
    /* Calculate the required memory size */
    memory_used = zend_accel_script_persist_calc(new_persistent_script, 1);
 
    /* Allocate shared memory */
    ZCG(mem) = zend_shared_alloc_aligned(memory_used);
    if (!ZCG(mem)) {
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Not enough shared memory for preloading. Consider increasing the value for the opcache.memory_consumption directive in php.ini.");
        return NULL;
    }
 
    bzero_aligned(ZCG(mem), memory_used);
 
    zend_shared_alloc_restore_xlat_table(checkpoint);
 
    /* Copy into shared memory */
    new_persistent_script = zend_accel_script_persist(new_persistent_script, 1);
 
    new_persistent_script->is_phar = is_phar_file(new_persistent_script->script.filename);
 
    /* Consistency check */
    if ((char*)new_persistent_script->mem + new_persistent_script->size != (char*)ZCG(mem)) {
        zend_accel_error(
            ((char*)new_persistent_script->mem + new_persistent_script->size < (char*)ZCG(mem)) ? ACCEL_LOG_ERROR : ACCEL_LOG_WARNING,
            "Internal error: wrong size calculation: %s start=" ZEND_ADDR_FMT ", end=" ZEND_ADDR_FMT ", real=" ZEND_ADDR_FMT "\n",
            ZSTR_VAL(new_persistent_script->script.filename),
            (size_t)new_persistent_script->mem,
            (size_t)((char *)new_persistent_script->mem + new_persistent_script->size),
            (size_t)ZCG(mem));
    }
 
    /* store script structure in the hash table */
    bucket = zend_accel_hash_update(&ZCSG(hash), new_persistent_script->script.filename, 0, new_persistent_script);
    if (bucket) {
        zend_accel_error(ACCEL_LOG_INFO, "Cached script '%s'", ZSTR_VAL(new_persistent_script->script.filename));
    }
 
    new_persistent_script->dynamic_members.memory_consumption = ZEND_ALIGNED_SIZE(new_persistent_script->size);
 
    return new_persistent_script;
}
 
static void preload_load(size_t orig_map_ptr_static_last)
{
    /* Load into process tables */
    zend_script *script = &ZCSG(preload_script)->script;
    if (zend_hash_num_elements(&script->function_table)) {
        Bucket *p = script->function_table.arData;
        Bucket *end = p + script->function_table.nNumUsed;
 
        zend_hash_extend(CG(function_table),
            CG(function_table)->nNumUsed + script->function_table.nNumUsed, 0);
        for (; p != end; p++) {
            _zend_hash_append_ptr_ex(CG(function_table), p->key, Z_PTR(p->val), 1);
        }
    }
 
    if (zend_hash_num_elements(&script->class_table)) {
        Bucket *p = script->class_table.arData;
        Bucket *end = p + script->class_table.nNumUsed;
 
        zend_hash_extend(CG(class_table),
            CG(class_table)->nNumUsed + script->class_table.nNumUsed, 0);
        for (; p != end; p++) {
            _zend_hash_append_ex(CG(class_table), p->key, &p->val, 1);
        }
    }
 
    if (EG(zend_constants)) {
        EG(persistent_constants_count) = EG(zend_constants)->nNumUsed;
    }
    if (EG(function_table)) {
        EG(persistent_functions_count) = EG(function_table)->nNumUsed;
    }
    if (EG(class_table)) {
        EG(persistent_classes_count)   = EG(class_table)->nNumUsed;
    }
 
    size_t old_map_ptr_last = CG(map_ptr_last);
    if (zend_map_ptr_static_last != ZCSG(map_ptr_static_last) || old_map_ptr_last != ZCSG(map_ptr_last)) {
        CG(map_ptr_last) = ZCSG(map_ptr_last);
        CG(map_ptr_size) = ZEND_MM_ALIGNED_SIZE_EX(ZCSG(map_ptr_last) + 1, 4096);
        zend_map_ptr_static_last = ZCSG(map_ptr_static_last);
 
        /* Grow map_ptr table as needed, but allocate once for static + regular map_ptrs */
        size_t new_static_size = ZEND_MM_ALIGNED_SIZE_EX(zend_map_ptr_static_last, 4096);
        if (zend_map_ptr_static_size != new_static_size) {
            void *new_base = pemalloc((new_static_size + CG(map_ptr_size)) * sizeof(void *), 1);
            if (CG(map_ptr_real_base)) {
                memcpy((void **) new_base + new_static_size - zend_map_ptr_static_size, CG(map_ptr_real_base), (old_map_ptr_last + zend_map_ptr_static_size) * sizeof(void *));
                pefree(CG(map_ptr_real_base), 1);
            }
            CG(map_ptr_real_base) = new_base;
            zend_map_ptr_static_size = new_static_size;
        } else {
            CG(map_ptr_real_base) = perealloc(CG(map_ptr_real_base), (zend_map_ptr_static_size + CG(map_ptr_size)) * sizeof(void *), 1);
        }
 
        memset((void **) CG(map_ptr_real_base) + zend_map_ptr_static_size + old_map_ptr_last, 0, (CG(map_ptr_last) - old_map_ptr_last) * sizeof(void *));
        CG(map_ptr_base) = ZEND_MAP_PTR_BIASED_BASE(CG(map_ptr_real_base));
    }
 
    if (orig_map_ptr_static_last != zend_map_ptr_static_last) {
        /* preloaded static entries currently are all runtime cache pointers, just assign them as such */
        size_t runtime_cache_size = zend_internal_run_time_cache_reserved_size();
        ZCG(preloaded_internal_run_time_cache_size) = (zend_map_ptr_static_last - orig_map_ptr_static_last) * runtime_cache_size;
        char *cache = pemalloc(ZCG(preloaded_internal_run_time_cache_size), 1);
        ZCG(preloaded_internal_run_time_cache) = cache;
 
        for (size_t cur_static_map_ptr = orig_map_ptr_static_last; cur_static_map_ptr < zend_map_ptr_static_last; ++cur_static_map_ptr) {
            *ZEND_MAP_PTR_STATIC_NUM_TO_PTR(cur_static_map_ptr) = cache;
            cache += runtime_cache_size;
        }
    }
}
 
static zend_result accel_preload(const char *config, bool in_child)
{
    zend_file_handle file_handle;
    zend_result ret;
    char *orig_open_basedir;
    size_t orig_map_ptr_last, orig_map_ptr_static_last;
    uint32_t orig_compiler_options;
 
    ZCG(enabled) = false;
    ZCG(accelerator_enabled) = false;
    orig_open_basedir = PG(open_basedir);
    PG(open_basedir) = NULL;
    preload_orig_compile_file = accelerator_orig_compile_file;
    accelerator_orig_compile_file = preload_compile_file;
 
    orig_map_ptr_last = CG(map_ptr_last);
    orig_map_ptr_static_last = zend_map_ptr_static_last;
 
    /* Compile and execute preloading script */
    zend_stream_init_filename(&file_handle, (char *) config);
 
    preload_scripts = emalloc(sizeof(HashTable));
    zend_hash_init(preload_scripts, 0, NULL, NULL, 0);
 
    orig_compiler_options = CG(compiler_options);
    if (in_child) {
        CG(compiler_options) |= ZEND_COMPILE_PRELOAD_IN_CHILD;
    }
    CG(compiler_options) |= ZEND_COMPILE_PRELOAD;
    CG(compiler_options) |= ZEND_COMPILE_HANDLE_OP_ARRAY;
    CG(compiler_options) |= ZEND_COMPILE_DELAYED_BINDING;
    CG(compiler_options) |= ZEND_COMPILE_NO_CONSTANT_SUBSTITUTION;
    CG(compiler_options) |= ZEND_COMPILE_IGNORE_OTHER_FILES;
    CG(skip_shebang) = true;
 
    zend_try {
        zend_op_array *op_array;
 
        ret = SUCCESS;
        op_array = zend_compile_file(&file_handle, ZEND_REQUIRE);
        if (file_handle.opened_path) {
            zend_hash_add_empty_element(&EG(included_files), file_handle.opened_path);
        }
        zend_destroy_file_handle(&file_handle);
        if (op_array) {
            zend_execute(op_array, NULL);
            zend_exception_restore();
            if (UNEXPECTED(EG(exception))) {
                if (Z_TYPE(EG(user_exception_handler)) != IS_UNDEF) {
                    zend_user_exception_handler();
                }
                if (EG(exception)) {
                    ret = zend_exception_error(EG(exception), E_ERROR);
                    if (ret == FAILURE) {
                        CG(unclean_shutdown) = true;
                    }
                }
            }
            destroy_op_array(op_array);
            efree_size(op_array, sizeof(zend_op_array));
        } else {
            if (EG(exception)) {
                zend_exception_error(EG(exception), E_ERROR);
            }
 
            CG(unclean_shutdown) = true;
            ret = FAILURE;
        }
    } zend_catch {
        ret = FAILURE;
    } zend_end_try();
 
    PG(open_basedir) = orig_open_basedir;
    accelerator_orig_compile_file = preload_orig_compile_file;
    ZCG(enabled) = true;
 
    zend_destroy_file_handle(&file_handle);
 
    if (ret == SUCCESS) {
        zend_persistent_script *script;
        int ping_auto_globals_mask;
        int i;
 
        if (PG(auto_globals_jit)) {
            ping_auto_globals_mask = zend_accel_get_auto_globals();
        } else {
            ping_auto_globals_mask = 0;
        }
 
        if (EG(zend_constants)) {
            /* Remember __COMPILER_HALT_OFFSET__(s). Do this early,
             * as zend_shutdown_executor_values() destroys constants. */
            ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
                zend_execute_data *orig_execute_data = EG(current_execute_data);
                zend_execute_data fake_execute_data;
                zval *offset;
 
                memset(&fake_execute_data, 0, sizeof(fake_execute_data));
                fake_execute_data.func = (zend_function*)&script->script.main_op_array;
                EG(current_execute_data) = &fake_execute_data;
                if ((offset = zend_get_constant_str("__COMPILER_HALT_OFFSET__", sizeof("__COMPILER_HALT_OFFSET__") - 1)) != NULL) {
                    script->compiler_halt_offset = Z_LVAL_P(offset);
                }
                EG(current_execute_data) = orig_execute_data;
            } ZEND_HASH_FOREACH_END();
        }
 
        /* Cleanup executor */
        EG(flags) |= EG_FLAGS_IN_SHUTDOWN;
 
        php_call_shutdown_functions();
        zend_call_destructors();
        php_output_end_all();
        php_free_shutdown_functions();
 
        /* Release stored values to avoid dangling pointers */
        zend_shutdown_executor_values(/* fast_shutdown */ false);
 
        /* On ZTS we execute `executor_globals_ctor` which reset the freelist and p5s pointers, while on NTS we don't.
         * We have to clean up the memory before the actual request takes place to avoid a memory leak. */
#ifdef ZTS
        zend_shutdown_strtod();
#endif
 
        /* We don't want to preload constants.
         * Check that  zend_shutdown_executor_values() also destroys constants. */
        ZEND_ASSERT(zend_hash_num_elements(EG(zend_constants)) == EG(persistent_constants_count));
 
        zend_hash_init(&EG(symbol_table), 0, NULL, ZVAL_PTR_DTOR, 0);
 
        CG(map_ptr_last) = orig_map_ptr_last;
 
        if (EG(full_tables_cleanup)) {
            zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Preloading is not compatible with dl() function.");
            ret = FAILURE;
            goto finish;
        }
 
        /* Inheritance errors may be thrown during linking */
        zend_try {
            preload_link();
        } zend_catch {
            CG(map_ptr_last) = orig_map_ptr_last;
            ret = FAILURE;
            goto finish;
        } zend_end_try();
 
        preload_remove_empty_includes();
 
        script = create_persistent_script();
        script->ping_auto_globals_mask = ping_auto_globals_mask;
 
        /* Store all functions and classes in a single pseudo-file */
        CG(compiled_filename) = ZSTR_INIT_LITERAL("$PRELOAD$", 0);
#if ZEND_USE_ABS_CONST_ADDR
        init_op_array(&script->script.main_op_array, ZEND_USER_FUNCTION, 1);
#else
        init_op_array(&script->script.main_op_array, ZEND_USER_FUNCTION, 2);
#endif
        script->script.main_op_array.fn_flags |= ZEND_ACC_DONE_PASS_TWO;
        script->script.main_op_array.last = 1;
        script->script.main_op_array.last_literal = 1;
        script->script.main_op_array.T = ZEND_OBSERVER_ENABLED;
#if ZEND_USE_ABS_CONST_ADDR
        script->script.main_op_array.literals = (zval*)emalloc(sizeof(zval));
#else
        script->script.main_op_array.literals = (zval*)(script->script.main_op_array.opcodes + 1);
#endif
        ZVAL_NULL(script->script.main_op_array.literals);
        memset(script->script.main_op_array.opcodes, 0, sizeof(zend_op));
        script->script.main_op_array.opcodes[0].opcode = ZEND_RETURN;
        script->script.main_op_array.opcodes[0].op1_type = IS_CONST;
        script->script.main_op_array.opcodes[0].op1.constant = 0;
        ZEND_PASS_TWO_UPDATE_CONSTANT(&script->script.main_op_array, script->script.main_op_array.opcodes, script->script.main_op_array.opcodes[0].op1);
        zend_vm_set_opcode_handler(script->script.main_op_array.opcodes);
 
        script->script.filename = CG(compiled_filename);
        CG(compiled_filename) = NULL;
 
        preload_move_user_functions(CG(function_table), &script->script.function_table);
        preload_move_user_classes(CG(class_table), &script->script.class_table);
 
        zend_hash_sort_ex(&script->script.class_table, preload_sort_classes, NULL, 0);
 
        preload_optimize(script);
 
        zend_shared_alloc_init_xlat_table();
 
        HANDLE_BLOCK_INTERRUPTIONS();
        SHM_UNPROTECT();
 
        ZCSG(preload_script) = preload_script_in_shared_memory(script);
 
        SHM_PROTECT();
        HANDLE_UNBLOCK_INTERRUPTIONS();
 
        preload_load(orig_map_ptr_static_last);
 
        /* Store individual scripts with unlinked classes */
        HANDLE_BLOCK_INTERRUPTIONS();
        SHM_UNPROTECT();
 
        i = 0;
        ZCSG(saved_scripts) = zend_shared_alloc((zend_hash_num_elements(preload_scripts) + 1) * sizeof(void*));
        ZEND_HASH_MAP_FOREACH_PTR(preload_scripts, script) {
            if (zend_hash_num_elements(&script->script.class_table) > 1) {
                zend_hash_sort_ex(&script->script.class_table, preload_sort_classes, NULL, 0);
            }
            ZCSG(saved_scripts)[i++] = preload_script_in_shared_memory(script);
        } ZEND_HASH_FOREACH_END();
        ZCSG(saved_scripts)[i] = NULL;
 
        zend_shared_alloc_save_state();
        accel_interned_strings_save_state();
 
        SHM_PROTECT();
        HANDLE_UNBLOCK_INTERRUPTIONS();
 
        zend_shared_alloc_destroy_xlat_table();
    } else {
        CG(map_ptr_last) = orig_map_ptr_last;
    }
 
finish:
    CG(compiler_options) = orig_compiler_options;
    zend_hash_destroy(preload_scripts);
    efree(preload_scripts);
    preload_scripts = NULL;
 
    return ret;
}
 
static size_t preload_ub_write(const char *str, size_t str_length)
{
    return fwrite(str, 1, str_length, stdout);
}
 
static void preload_flush(void *server_context)
{
    fflush(stdout);
}
 
static int preload_header_handler(sapi_header_struct *h, sapi_header_op_enum op, sapi_headers_struct *s)
{
    return 0;
}
 
static int preload_send_headers(sapi_headers_struct *sapi_headers)
{
    return SAPI_HEADER_SENT_SUCCESSFULLY;
}
 
static void preload_send_header(sapi_header_struct *sapi_header, void *server_context)
{
}
 
#ifndef ZEND_WIN32
static zend_result accel_finish_startup_preload(bool in_child)
{
    zend_result ret = SUCCESS;
    int orig_error_reporting;
 
    int (*orig_activate)(void) = sapi_module.activate;
    int (*orig_deactivate)(void) = sapi_module.deactivate;
    void (*orig_register_server_variables)(zval *track_vars_array) = sapi_module.register_server_variables;
    int (*orig_header_handler)(sapi_header_struct *sapi_header, sapi_header_op_enum op, sapi_headers_struct *sapi_headers) = sapi_module.header_handler;
    int (*orig_send_headers)(sapi_headers_struct *sapi_headers) = sapi_module.send_headers;
    void (*orig_send_header)(sapi_header_struct *sapi_header, void *server_context)= sapi_module.send_header;
    char *(*orig_getenv)(const char *name, size_t name_len) = sapi_module.getenv;
    size_t (*orig_ub_write)(const char *str, size_t str_length) = sapi_module.ub_write;
    void (*orig_flush)(void *server_context) = sapi_module.flush;
#ifdef ZEND_SIGNALS
    bool old_reset_signals = SIGG(reset);
#endif
 
    sapi_module.activate = NULL;
    sapi_module.deactivate = NULL;
    sapi_module.register_server_variables = NULL;
    sapi_module.header_handler = preload_header_handler;
    sapi_module.send_headers = preload_send_headers;
    sapi_module.send_header = preload_send_header;
    sapi_module.getenv = NULL;
    sapi_module.ub_write = preload_ub_write;
    sapi_module.flush = preload_flush;
 
    zend_interned_strings_switch_storage(1);
 
#ifdef ZEND_SIGNALS
    SIGG(reset) = false;
#endif
 
    orig_error_reporting = EG(error_reporting);
    EG(error_reporting) = 0;
 
    const zend_result rc = php_request_startup();
 
    EG(error_reporting) = orig_error_reporting;
 
    if (rc == SUCCESS) {
        bool orig_report_memleaks;
 
        /* don't send headers */
        SG(headers_sent) = true;
        SG(request_info).no_headers = true;
        php_output_set_status(0);
 
        ZCG(auto_globals_mask) = 0;
        ZCG(request_time) = (time_t)sapi_get_request_time();
        ZCG(cache_opline) = NULL;
        ZCG(cache_persistent_script) = NULL;
        ZCG(include_path_key_len) = 0;
        ZCG(include_path_check) = true;
 
        ZCG(cwd) = NULL;
        ZCG(cwd_key_len) = 0;
        ZCG(cwd_check) = true;
 
        if (accel_preload(ZCG(accel_directives).preload, in_child) != SUCCESS) {
            ret = FAILURE;
        }
        preload_flush(NULL);
 
        orig_report_memleaks = PG(report_memleaks);
        PG(report_memleaks) = false;
#ifdef ZEND_SIGNALS
        /* We may not have registered signal handlers due to SIGG(reset)=0, so
         * also disable the check that they are registered. */
        SIGG(check) = false;
#endif
        php_request_shutdown(NULL); /* calls zend_shared_alloc_unlock(); */
        EG(class_table) = NULL;
        EG(function_table) = NULL;
        PG(report_memleaks) = orig_report_memleaks;
#ifdef ZTS
        /* Reset the virtual CWD state back to the original state created by virtual_cwd_startup().
         * This is necessary because the normal startup code assumes the CWD state is active. */
        virtual_cwd_activate();
#endif
    } else {
        zend_shared_alloc_unlock();
        ret = FAILURE;
    }
#ifdef ZEND_SIGNALS
    SIGG(reset) = old_reset_signals;
#endif
 
    sapi_module.activate = orig_activate;
    sapi_module.deactivate = orig_deactivate;
    sapi_module.register_server_variables = orig_register_server_variables;
    sapi_module.header_handler = orig_header_handler;
    sapi_module.send_headers = orig_send_headers;
    sapi_module.send_header = orig_send_header;
    sapi_module.getenv = orig_getenv;
    sapi_module.ub_write = orig_ub_write;
    sapi_module.flush = orig_flush;
 
    sapi_activate();
 
    return ret;
}
 
static zend_result accel_finish_startup_preload_subprocess(pid_t *pid)
{
    uid_t euid = geteuid();
    if (euid != 0) {
        if (ZCG(accel_directives).preload_user
         && *ZCG(accel_directives).preload_user) {
            zend_accel_error(ACCEL_LOG_WARNING, "\"opcache.preload_user\" is ignored because the current user is not \"root\"");
        }
 
        *pid = -1;
        return SUCCESS;
    }
 
    if (!ZCG(accel_directives).preload_user
     || !*ZCG(accel_directives).preload_user) {
 
        bool sapi_requires_preload_user = !(strcmp(sapi_module.name, "cli") == 0
          || strcmp(sapi_module.name, "phpdbg") == 0);
 
        if (!sapi_requires_preload_user) {
            *pid = -1;
            return SUCCESS;
        }
 
        zend_shared_alloc_unlock();
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "\"opcache.preload\" requires \"opcache.preload_user\" when running under uid 0");
        return FAILURE;
    }
 
    struct passwd *pw = getpwnam(ZCG(accel_directives).preload_user);
    if (pw == NULL) {
        zend_shared_alloc_unlock();
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Preloading failed to getpwnam(\"%s\")", ZCG(accel_directives).preload_user);
        return FAILURE;
    }
 
    if (pw->pw_uid == euid) {
        *pid = -1;
        return SUCCESS;
    }
 
    *pid = fork();
    if (*pid == -1) {
        zend_shared_alloc_unlock();
        zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Preloading failed to fork()");
        return FAILURE;
    }
 
    if (*pid == 0) { /* children */
        if (setgid(pw->pw_gid) < 0) {
            zend_accel_error(ACCEL_LOG_WARNING, "Preloading failed to setgid(%d)", pw->pw_gid);
            exit(1);
        }
        if (initgroups(pw->pw_name, pw->pw_gid) < 0) {
            zend_accel_error(ACCEL_LOG_WARNING, "Preloading failed to initgroups(\"%s\", %d)", pw->pw_name, pw->pw_uid);
            exit(1);
        }
        if (setuid(pw->pw_uid) < 0) {
            zend_accel_error(ACCEL_LOG_WARNING, "Preloading failed to setuid(%d)", pw->pw_uid);
            exit(1);
        }
    }
 
    return SUCCESS;
}
#endif /* ZEND_WIN32 */
 
static zend_result accel_finish_startup(void)
{
    if (!ZCG(enabled) || !accel_startup_ok) {
        return SUCCESS;
    }
 
    if (!(ZCG(accel_directives).preload && *ZCG(accel_directives).preload)) {
        return SUCCESS;
    }
 
#ifdef ZEND_WIN32
    zend_accel_error_noreturn(ACCEL_LOG_ERROR, "Preloading is not supported on Windows");
    return FAILURE;
#else /* ZEND_WIN32 */
 
    if (UNEXPECTED(file_cache_only)) {
        zend_accel_error(ACCEL_LOG_WARNING, "Preloading doesn't work in \"file_cache_only\" mode");
        return SUCCESS;
    }
 
    /* exclusive lock */
    zend_shared_alloc_lock();
 
    if (ZCSG(preload_script)) {
        /* Preloading was done in another process */
        preload_load(zend_map_ptr_static_last);
        zend_shared_alloc_unlock();
        return SUCCESS;
    }
 
 
    pid_t pid;
    if (accel_finish_startup_preload_subprocess(&pid) == FAILURE) {
        zend_shared_alloc_unlock();
        return FAILURE;
    }
 
    if (pid == -1) { /* no subprocess was needed */
        /* The called function unlocks the shared alloc lock */
        return accel_finish_startup_preload(false);
    } else if (pid == 0) { /* subprocess */
        const zend_result ret = accel_finish_startup_preload(true);
 
        exit(ret == SUCCESS ? 0 : 1);
    } else { /* parent */
        int status;
 
        if (waitpid(pid, &status, 0) < 0) {
            zend_shared_alloc_unlock();
            zend_accel_error_noreturn(ACCEL_LOG_FATAL, "Preloading failed to waitpid(%d)", pid);
        }
 
        if (ZCSG(preload_script)) {
            preload_load(zend_map_ptr_static_last);
        }
 
        zend_shared_alloc_unlock();
 
        if (WIFEXITED(status) && WEXITSTATUS(status) == 0) {
            return SUCCESS;
        } else {
            return FAILURE;
        }
    }
#endif /* ZEND_WIN32 */
}
 
static void accel_activate(void) {
    if (ZCG(preloaded_internal_run_time_cache)) {
        memset(ZCG(preloaded_internal_run_time_cache), 0, ZCG(preloaded_internal_run_time_cache_size));
    }
}
 
ZEND_EXT_API zend_extension zend_extension_entry = {
    ACCELERATOR_PRODUCT_NAME,               /* name */
    PHP_VERSION,                         /* version */
    "Zend Technologies",                    /* author */
    "http://www.zend.com/",                 /* URL */
    "Copyright (c)",                        /* copyright */
    accel_startup,                          /* startup */
    NULL,                                   /* shutdown */
    accel_activate,                         /* per-script activation */
#ifdef HAVE_JIT
    accel_deactivate,                       /* per-script deactivation */
#else
    NULL,                                   /* per-script deactivation */
#endif
    NULL,                                   /* message handler */
    NULL,                                   /* op_array handler */
    NULL,                                   /* extended statement handler */
    NULL,                                   /* extended fcall begin handler */
    NULL,                                   /* extended fcall end handler */
    NULL,                                   /* op_array ctor */
    NULL,                                   /* op_array dtor */
    STANDARD_ZEND_EXTENSION_PROPERTIES
};