/src/php-src/ext/opcache/zend_file_cache.c

Source
/*
   +----------------------------------------------------------------------+
   | Zend OPcache                                                         |
   +----------------------------------------------------------------------+
   | Copyright © The PHP Group and Contributors.                          |
   +----------------------------------------------------------------------+
   | This source file is subject to the Modified BSD License that is      |
   | bundled with this package in the file LICENSE, and is available      |
   | through the World Wide Web at <https://www.php.net/license/>.        |
   |                                                                      |
   | SPDX-License-Identifier: BSD-3-Clause                                |
   +----------------------------------------------------------------------+
   | Authors: Dmitry Stogov <dmitry@php.net>                              |
   +----------------------------------------------------------------------+
*/

#include "zend.h"
#include "zend_virtual_cwd.h"
#include "zend_compile.h"
#include "zend_vm.h"
#include "zend_interfaces.h"
#include "zend_attributes.h"
#include "zend_system_id.h"
#include "zend_enum.h"
#include "zend_partial.h"

#include "php.h"
#ifdef ZEND_WIN32
#include "ext/standard/md5.h"
#endif
#include "ext/standard/php_filestat.h"

#include "ZendAccelerator.h"
#include "zend_file_cache.h"
#include "zend_shared_alloc.h"
#include "zend_accelerator_util_funcs.h"
#include "zend_accelerator_hash.h"

#ifdef HAVE_JIT
#include "jit/zend_jit.h"
#endif

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#ifdef HAVE_SYS_UIO_H
# include <sys/uio.h>
#endif

#ifdef HAVE_SYS_FILE_H
# include <sys/file.h>
#endif

#if __has_feature(memory_sanitizer)
# include <sanitizer/msan_interface.h>
#endif

#ifndef ZEND_WIN32
#define zend_file_cache_unlink unlink
#define zend_file_cache_open open
#else
#define zend_file_cache_unlink php_win32_ioutil_unlink
#define zend_file_cache_open php_win32_ioutil_open
#endif

#ifdef ZEND_WIN32
# define LOCK_SH 0
# define LOCK_EX 1
# define LOCK_UN 2
static int zend_file_cache_flock(int fd, int op)
{
  OVERLAPPED offset = {0, 0, {{0}}, NULL};
  if (op == LOCK_EX) {
    if (LockFileEx((HANDLE)_get_osfhandle(fd),
                   LOCKFILE_EXCLUSIVE_LOCK, 0, 1, 0, &offset) == TRUE) {
      return 0;
    }
  } else if (op == LOCK_SH) {
    if (LockFileEx((HANDLE)_get_osfhandle(fd),
                   0, 0, 1, 0, &offset) == TRUE) {
      return 0;
    }
  } else if (op == LOCK_UN) {
    if (UnlockFileEx((HANDLE)_get_osfhandle(fd),
                     0, 1, 0, &offset) == TRUE) {
      return 0;
    }
  }
  return -1;
}
#elif defined(HAVE_FLOCK)
# define zend_file_cache_flock flock
#else
# define LOCK_SH 0
# define LOCK_EX 1
# define LOCK_UN 2
static int zend_file_cache_flock(int fd, int type)
{
  return 0;
}
#endif

#ifndef O_BINARY
#  define O_BINARY 0
#endif

#define SUFFIX ".bin"

#define IS_SERIALIZED_INTERNED(ptr) \
  ((size_t)(ptr) & Z_UL(1))

/* Allowing == on the upper bound accounts for a potential empty allocation at the end of the
 * memory region. This can also happen for a return-type-only arg_info, where &arg_info[1] is
 * stored, which may point to the end of the region. */
#define IS_SERIALIZED(ptr) \
  ((char*)(ptr) <= (char*)script->size)
#define IS_UNSERIALIZED(ptr) \
  (((char*)(ptr) >= (char*)script->mem && (char*)(ptr) <= (char*)script->mem + script->size) || \
   IS_ACCEL_INTERNED(ptr))
#define SERIALIZE_PTR(ptr) do { \
    if (ptr) { \
      ZEND_ASSERT(IS_UNSERIALIZED(ptr)); \
      (ptr) = (void*)((char*)(ptr) - (char*)script->mem); \
    } \
  } while (0)
#define UNSERIALIZE_PTR(ptr) do { \
    if (ptr) { \
      ZEND_ASSERT(IS_SERIALIZED(ptr)); \
      (ptr) = (void*)((char*)buf + (size_t)(ptr)); \
    } \
  } while (0)

#define SERIALIZE_STR(ptr) do { \
    if (ptr) { \
      if (IS_ACCEL_INTERNED(ptr)) { \
        (ptr) = zend_file_cache_serialize_interned((zend_string*)(ptr), info); \
      } else { \
        ZEND_ASSERT(IS_UNSERIALIZED(ptr)); \
        (ptr) = (void*)((char*)(ptr) - (char*)script->mem); \
      } \
    } \
  } while (0)
#define UNSERIALIZE_STR(ptr) do { \
    if (ptr) { \
      if (IS_SERIALIZED_INTERNED(ptr)) { \
        (ptr) = (void*)zend_file_cache_unserialize_interned((zend_string*)(ptr), !script->corrupted); \
      } else { \
        ZEND_ASSERT(IS_SERIALIZED(ptr)); \
        (ptr) = (void*)((char*)buf + (size_t)(ptr)); \
        /* script->corrupted shows if the script in SHM or not */ \
        if (EXPECTED(!script->corrupted)) { \
          GC_ADD_FLAGS(ptr, IS_STR_INTERNED | IS_STR_PERMANENT); \
        } else { \
          GC_ADD_FLAGS(ptr, IS_STR_INTERNED); \
          GC_DEL_FLAGS(ptr, IS_STR_PERMANENT); \
        } \
        GC_DEL_FLAGS(ptr, IS_STR_CLASS_NAME_MAP_PTR); \
      } \
    } \
  } while (0)

#define SERIALIZE_ATTRIBUTES(attributes) do { \
  if ((attributes) && !IS_SERIALIZED(attributes)) { \
    HashTable *ht; \
    SERIALIZE_PTR(attributes); \
    ht = (attributes); \
    UNSERIALIZE_PTR(ht); \
    zend_file_cache_serialize_hash(ht, script, info, buf, zend_file_cache_serialize_attribute); \
  } \
} while (0)

#define UNSERIALIZE_ATTRIBUTES(attributes) do { \
  if ((attributes) && !IS_UNSERIALIZED(attributes)) { \
    HashTable *ht; \
    UNSERIALIZE_PTR(attributes); \
    ht = (attributes); \
    zend_file_cache_unserialize_hash(ht, script, buf, zend_file_cache_unserialize_attribute, NULL); \
  } \
} while (0)

#define HOOKED_ITERATOR_PLACEHOLDER ((void*)1)

static const uint32_t uninitialized_bucket[-HT_MIN_MASK] =
  {HT_INVALID_IDX, HT_INVALID_IDX};

typedef struct _zend_file_cache_metainfo {
  char         magic[8];
  char         system_id[32];
  size_t       mem_size;
  size_t       str_size;
  size_t       script_offset;
  accel_time_t timestamp;
  uint32_t     checksum;
} zend_file_cache_metainfo;

static int zend_file_cache_mkdir(char *filename, size_t start)
{
  char *s = filename + start;

  while (*s) {
    if (IS_SLASH(*s)) {
      char old = *s;
      *s = '\000';
#ifndef ZEND_WIN32
      if (mkdir(filename, S_IRWXU) < 0 && errno != EEXIST) {
#else
      if (php_win32_ioutil_mkdir(filename, 0700) < 0 && errno != EEXIST) {
#endif
        *s = old;
        return FAILURE;
      }
      *s = old;
    }
    s++;
  }
  return SUCCESS;
}

typedef void (*serialize_callback_t)(zval                     *zv,
                                     zend_persistent_script   *script,
                                     zend_file_cache_metainfo *info,
                                     void                     *buf);

typedef void (*unserialize_callback_t)(zval                    *zv,
                                       zend_persistent_script  *script,
                                       void                    *buf);

static void zend_file_cache_serialize_zval(zval                     *zv,
                                           zend_persistent_script   *script,
                                           zend_file_cache_metainfo *info,
                                           void                     *buf);
static void zend_file_cache_unserialize_zval(zval                    *zv,
                                             zend_persistent_script  *script,
                                             void                    *buf);

static void zend_file_cache_serialize_func(zval                     *zv,
                                           zend_persistent_script   *script,
                                           zend_file_cache_metainfo *info,
                                           void                     *buf);

static void zend_file_cache_unserialize_func(zval                    *zv,
                                             zend_persistent_script  *script,
                                             void                    *buf);

static void zend_file_cache_serialize_attribute(zval                     *zv,
                                                zend_persistent_script   *script,
                                                zend_file_cache_metainfo *info,
                                                void                     *buf);

static void zend_file_cache_unserialize_attribute(zval *zv, zend_persistent_script *script, void *buf);

static void *zend_file_cache_serialize_interned(zend_string              *str,
                                                zend_file_cache_metainfo *info)
{
  size_t len;
  void *ret;

  /* check if the same interned string was already stored */
  ret = zend_shared_alloc_get_xlat_entry(str);
  if (ret) {
    return ret;
  }

  len = ZEND_MM_ALIGNED_SIZE(_ZSTR_STRUCT_SIZE(ZSTR_LEN(str)));
  ret = (void*)(info->str_size | Z_UL(1));
  zend_shared_alloc_register_xlat_entry(str, ret);

  zend_string *s = (zend_string*)ZCG(mem);
  if (info->str_size + len > ZSTR_LEN(s)) {
    size_t new_len = info->str_size + len;
    s = zend_string_realloc(
      s,
      ((_ZSTR_HEADER_SIZE + 1 + new_len + 4095) & ~0xfff) - (_ZSTR_HEADER_SIZE + 1),
      0);
    ZCG(mem) = (void*)s;
  }

  zend_string *new_str = (zend_string *) (ZSTR_VAL(s) + info->str_size);
  memcpy(new_str, str, len);
  GC_ADD_FLAGS(new_str, IS_STR_INTERNED);
  GC_DEL_FLAGS(new_str, IS_STR_PERMANENT|IS_STR_CLASS_NAME_MAP_PTR);
  info->str_size += len;
  return ret;
}

static void *zend_file_cache_unserialize_interned(zend_string *str, bool in_shm)
{
  str = (zend_string*)((char*)ZCG(mem) + ((size_t)(str) & ~Z_UL(1)));
  if (!in_shm) {
    return str;
  }

  zend_string *ret = accel_new_interned_string(str);
  if (ret == str) {
    /* We have to create new SHM allocated string */
    size_t size = _ZSTR_STRUCT_SIZE(ZSTR_LEN(str));
    ret = zend_shared_alloc(size);
    if (!ret) {
      zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
      LONGJMP(*EG(bailout), FAILURE);
    }
    memcpy(ret, str, size);
    /* String wasn't interned but we will use it as interned anyway */
    GC_SET_REFCOUNT(ret, 1);
    GC_TYPE_INFO(ret) = GC_STRING | ((IS_STR_INTERNED | IS_STR_PERSISTENT | IS_STR_PERMANENT) << GC_FLAGS_SHIFT);
  }
  return ret;
}

static void zend_file_cache_serialize_hash(HashTable                *ht,
                                           zend_persistent_script   *script,
                                           zend_file_cache_metainfo *info,
                                           void                     *buf,
                                           serialize_callback_t      func)
{
  if (HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED) {
    ht->arData = NULL;
    return;
  }
  if (IS_SERIALIZED(ht->arData)) {
    return;
  }
  if (HT_IS_PACKED(ht)) {
    zval *p, *end;

    SERIALIZE_PTR(ht->arPacked);
    p = ht->arPacked;
    UNSERIALIZE_PTR(p);
    end = p + ht->nNumUsed;
    while (p < end) {
      if (Z_TYPE_P(p) != IS_UNDEF) {
        func(p, script, info, buf);
      }
      p++;
    }
  } else {
    Bucket *p, *end;

    SERIALIZE_PTR(ht->arData);
    p = ht->arData;
    UNSERIALIZE_PTR(p);
    end = p + ht->nNumUsed;
    while (p < end) {
      if (Z_TYPE(p->val) != IS_UNDEF) {
        SERIALIZE_STR(p->key);
        func(&p->val, script, info, buf);
      }
      p++;
    }
  }
}

static void zend_file_cache_serialize_ast(zend_ast                 *ast,
                                          zend_persistent_script   *script,
                                          zend_file_cache_metainfo *info,
                                          void                     *buf)
{
  uint32_t i;
  zend_ast *tmp;

  if (ast->kind == ZEND_AST_ZVAL || ast->kind == ZEND_AST_CONSTANT) {
    zend_file_cache_serialize_zval(&((zend_ast_zval*)ast)->val, script, info, buf);
  } else if (zend_ast_is_list(ast)) {
    zend_ast_list *list = zend_ast_get_list(ast);
    for (i = 0; i < list->children; i++) {
      if (list->child[i] && !IS_SERIALIZED(list->child[i])) {
        SERIALIZE_PTR(list->child[i]);
        tmp = list->child[i];
        UNSERIALIZE_PTR(tmp);
        zend_file_cache_serialize_ast(tmp, script, info, buf);
      }
    }
  } else if (ast->kind == ZEND_AST_OP_ARRAY) {
    zval z;
    ZVAL_PTR(&z, zend_ast_get_op_array(ast)->op_array);
    zend_file_cache_serialize_func(&z, script, info, buf);
    zend_ast_get_op_array(ast)->op_array = Z_PTR(z);
  } else if (ast->kind == ZEND_AST_CALLABLE_CONVERT) {
    zend_ast_fcc *fcc = (zend_ast_fcc*)ast;
    ZEND_MAP_PTR_INIT(fcc->fptr, NULL);
    /* Will be reset if needed during unserialize */
    fcc->attr |= ZEND_PARTIAL_CACHEABLE_IN_SHM;
    SERIALIZE_STR(fcc->filename);
    SERIALIZE_STR(fcc->name);
    if (!IS_SERIALIZED(fcc->args)) {
      SERIALIZE_PTR(fcc->args);
      tmp = fcc->args;
      UNSERIALIZE_PTR(tmp);
      zend_file_cache_serialize_ast(tmp, script, info, buf);
    }
  } else if (zend_ast_is_decl(ast)) {
    /* Not implemented. */
    ZEND_UNREACHABLE();
  } else {
    uint32_t children = zend_ast_get_num_children(ast);
    for (i = 0; i < children; i++) {
      if (ast->child[i] && !IS_SERIALIZED(ast->child[i])) {
        SERIALIZE_PTR(ast->child[i]);
        tmp = ast->child[i];
        UNSERIALIZE_PTR(tmp);
        zend_file_cache_serialize_ast(tmp, script, info, buf);
      }
    }
  }
}

static void zend_file_cache_serialize_zval(zval                     *zv,
                                           zend_persistent_script   *script,
                                           zend_file_cache_metainfo *info,
                                           void                     *buf)
{
  switch (Z_TYPE_P(zv)) {
    case IS_STRING:
      if (!IS_SERIALIZED(Z_STR_P(zv))) {
        SERIALIZE_STR(Z_STR_P(zv));
      }
      break;
    case IS_ARRAY:
      if (!IS_SERIALIZED(Z_ARR_P(zv))) {
        HashTable *ht;

        SERIALIZE_PTR(Z_ARR_P(zv));
        ht = Z_ARR_P(zv);
        UNSERIALIZE_PTR(ht);
        zend_file_cache_serialize_hash(ht, script, info, buf, zend_file_cache_serialize_zval);
      }
      break;
    case IS_CONSTANT_AST:
      if (!IS_SERIALIZED(Z_AST_P(zv))) {
        zend_ast_ref *ast;

        SERIALIZE_PTR(Z_AST_P(zv));
        ast = Z_AST_P(zv);
        UNSERIALIZE_PTR(ast);
        zend_file_cache_serialize_ast(GC_AST(ast), script, info, buf);
      }
      break;
    case IS_INDIRECT:
      /* Used by static properties. */
      SERIALIZE_PTR(Z_INDIRECT_P(zv));
      break;
    case IS_PTR:
      /* Used by attributes on constants, will be handled separately */
      break;
    default:
      ZEND_ASSERT(Z_TYPE_P(zv) < IS_STRING);
      break;
  }
}

static void zend_file_cache_serialize_attribute(zval                     *zv,
                                                zend_persistent_script   *script,
                                                zend_file_cache_metainfo *info,
                                                void                     *buf)
{
  zend_attribute *attr = Z_PTR_P(zv);
  uint32_t i;

  SERIALIZE_PTR(Z_PTR_P(zv));
  attr = Z_PTR_P(zv);
  UNSERIALIZE_PTR(attr);

  SERIALIZE_STR(attr->name);
  SERIALIZE_STR(attr->lcname);
  SERIALIZE_STR(attr->validation_error);

  for (i = 0; i < attr->argc; i++) {
    SERIALIZE_STR(attr->args[i].name);
    zend_file_cache_serialize_zval(&attr->args[i].value, script, info, buf);
  }
}

static void zend_file_cache_serialize_type(
    zend_type *type, zend_persistent_script *script, zend_file_cache_metainfo *info, void *buf)
{
  if (ZEND_TYPE_HAS_LIST(*type)) {
    zend_type_list *list = ZEND_TYPE_LIST(*type);
    SERIALIZE_PTR(list);
    ZEND_TYPE_SET_PTR(*type, list);
    UNSERIALIZE_PTR(list);

    zend_type *list_type;
    ZEND_TYPE_LIST_FOREACH_MUTABLE(list, list_type) {
      zend_file_cache_serialize_type(list_type, script, info, buf);
    } ZEND_TYPE_LIST_FOREACH_END();
  } else if (ZEND_TYPE_HAS_NAME(*type)) {
    zend_string *type_name = ZEND_TYPE_NAME(*type);
    SERIALIZE_STR(type_name);
    ZEND_TYPE_SET_PTR(*type, type_name);
  }
}

static void zend_file_cache_serialize_op_array(zend_op_array            *op_array,
                                               zend_persistent_script   *script,
                                               zend_file_cache_metainfo *info,
                                               void                     *buf)
{
  ZEND_MAP_PTR_INIT(op_array->static_variables_ptr, NULL);
  ZEND_MAP_PTR_INIT(op_array->run_time_cache, NULL);

  /* Check whether this op_array has already been serialized. */
  if (IS_SERIALIZED(op_array->opcodes)) {
    ZEND_ASSERT(op_array->scope && "Only method op_arrays should be shared");
    return;
  }

  if (op_array->scope) {
    if (UNEXPECTED(zend_shared_alloc_get_xlat_entry(op_array->opcodes))) {
      op_array->refcount = (uint32_t*)(intptr_t)-1;
      SERIALIZE_PTR(op_array->static_variables);
      SERIALIZE_PTR(op_array->literals);
      SERIALIZE_PTR(op_array->opcodes);
      SERIALIZE_PTR(op_array->arg_info);
      SERIALIZE_PTR(op_array->vars);
      SERIALIZE_STR(op_array->function_name);
      SERIALIZE_STR(op_array->filename);
      SERIALIZE_PTR(op_array->live_range);
      SERIALIZE_PTR(op_array->scope);
      SERIALIZE_STR(op_array->doc_comment);
      SERIALIZE_ATTRIBUTES(op_array->attributes);
      SERIALIZE_PTR(op_array->try_catch_array);
      SERIALIZE_PTR(op_array->prototype);
      SERIALIZE_PTR(op_array->prop_info);
      return;
    }
    zend_shared_alloc_register_xlat_entry(op_array->opcodes, op_array->opcodes);
  }

  if (op_array->static_variables) {
    HashTable *ht;

    SERIALIZE_PTR(op_array->static_variables);
    ht = op_array->static_variables;
    UNSERIALIZE_PTR(ht);
    zend_file_cache_serialize_hash(ht, script, info, buf, zend_file_cache_serialize_zval);
  }

  if (op_array->literals) {
    zval *p, *end;

    SERIALIZE_PTR(op_array->literals);
    p = op_array->literals;
    UNSERIALIZE_PTR(p);
    end = p + op_array->last_literal;
    while (p < end) {
      zend_file_cache_serialize_zval(p, script, info, buf);
      p++;
    }
  }

  {
    zend_op *opline, *end;

#if !ZEND_USE_ABS_CONST_ADDR
    zval *literals = op_array->literals;
    UNSERIALIZE_PTR(literals);
#endif

    SERIALIZE_PTR(op_array->opcodes);
    opline = op_array->opcodes;
    UNSERIALIZE_PTR(opline);
    end = opline + op_array->last;
    while (opline < end) {
      if (opline->opcode == ZEND_OP_DATA
        && (opline-1)->opcode == ZEND_DECLARE_ATTRIBUTED_CONST
      ) {
        zval *literal = RT_CONSTANT(opline, opline->op1);
        SERIALIZE_ATTRIBUTES(Z_PTR_P(literal));
      }

#if ZEND_USE_ABS_CONST_ADDR
      if (opline->op1_type == IS_CONST) {
        SERIALIZE_PTR(opline->op1.zv);
      }
      if (opline->op2_type == IS_CONST) {
        SERIALIZE_PTR(opline->op2.zv);

        /* See GH-17733. Reset Z_EXTRA_P(op2) of ZEND_INIT_FCALL, which
         * is an offset into the global function table, to avoid calling
         * incorrect functions when environment changes. This, and the
         * equivalent code below, can be removed once proper system ID
         * validation is implemented. */
        if (opline->opcode == ZEND_INIT_FCALL) {
          zval *op2 = opline->op2.zv;
          UNSERIALIZE_PTR(op2);
          Z_EXTRA_P(op2) = 0;
          ZEND_VM_SET_OPCODE_HANDLER(opline);
        }
      }
#else
      if (opline->op1_type == IS_CONST) {
        opline->op1.constant = RT_CONSTANT(opline, opline->op1) - literals;
      }
      if (opline->op2_type == IS_CONST) {
        zval *op2 = RT_CONSTANT(opline, opline->op2);
        opline->op2.constant = op2 - literals;

        /* See GH-17733 and comment above. */
        if (opline->opcode == ZEND_INIT_FCALL) {
          Z_EXTRA_P(op2) = 0;
          ZEND_VM_SET_OPCODE_HANDLER(opline);
        }
      }
#endif
#if ZEND_USE_ABS_JMP_ADDR
      switch (opline->opcode) {
        case ZEND_JMP:
        case ZEND_FAST_CALL:
          SERIALIZE_PTR(opline->op1.jmp_addr);
          break;
        case ZEND_JMPZ:
        case ZEND_JMPNZ:
        case ZEND_JMPZ_EX:
        case ZEND_JMPNZ_EX:
        case ZEND_JMP_SET:
        case ZEND_COALESCE:
        case ZEND_FE_RESET_R:
        case ZEND_FE_RESET_RW:
        case ZEND_ASSERT_CHECK:
        case ZEND_JMP_NULL:
        case ZEND_BIND_INIT_STATIC_OR_JMP:
        case ZEND_JMP_FRAMELESS:
          SERIALIZE_PTR(opline->op2.jmp_addr);
          break;
        case ZEND_CATCH:
          if (!(opline->extended_value & ZEND_LAST_CATCH)) {
            SERIALIZE_PTR(opline->op2.jmp_addr);
          }
          break;
        case ZEND_FE_FETCH_R:
        case ZEND_FE_FETCH_RW:
        case ZEND_SWITCH_LONG:
        case ZEND_SWITCH_STRING:
        case ZEND_MATCH:
          /* relative extended_value don't have to be changed */
          break;
      }
#endif

      if (opline->opcode == ZEND_CALLABLE_CONVERT_PARTIAL) {
        /* Will be reset if needed during unserialize */
        opline->extended_value |= ZEND_PARTIAL_CACHEABLE_IN_SHM;
      }

      zend_serialize_opcode_handler(opline);
      opline++;
    }

    if (op_array->arg_info) {
      zend_arg_info *p, *end;
      SERIALIZE_PTR(op_array->arg_info);
      p = op_array->arg_info;
      UNSERIALIZE_PTR(p);
      end = p + op_array->num_args;
      if (op_array->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
        p--;
      }
      if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
        end++;
      }
      while (p < end) {
        if (!IS_SERIALIZED(p->name)) {
          SERIALIZE_STR(p->name);
        }
        zend_file_cache_serialize_type(&p->type, script, info, buf);
        SERIALIZE_STR(p->doc_comment);
        p++;
      }
    }

    if (op_array->vars) {
      zend_string **p, **end;

      SERIALIZE_PTR(op_array->vars);
      p = op_array->vars;
      UNSERIALIZE_PTR(p);
      end = p + op_array->last_var;
      while (p < end) {
        if (!IS_SERIALIZED(*p)) {
          SERIALIZE_STR(*p);
        }
        p++;
      }
    }

    if (op_array->num_dynamic_func_defs) {
      zend_op_array **defs;
      SERIALIZE_PTR(op_array->dynamic_func_defs);
      defs = op_array->dynamic_func_defs;
      UNSERIALIZE_PTR(defs);
      for (uint32_t i = 0; i < op_array->num_dynamic_func_defs; i++) {
        zend_op_array *def;
        SERIALIZE_PTR(defs[i]);
        def = defs[i];
        UNSERIALIZE_PTR(def);
        zend_file_cache_serialize_op_array(def, script, info, buf);
      }
    }

    SERIALIZE_STR(op_array->function_name);
    SERIALIZE_STR(op_array->filename);
    SERIALIZE_PTR(op_array->live_range);
    SERIALIZE_PTR(op_array->scope);
    SERIALIZE_STR(op_array->doc_comment);
    SERIALIZE_ATTRIBUTES(op_array->attributes);
    SERIALIZE_PTR(op_array->try_catch_array);
    SERIALIZE_PTR(op_array->prototype);
    SERIALIZE_PTR(op_array->prop_info);
  }
}

static void zend_file_cache_serialize_func(zval                     *zv,
                                           zend_persistent_script   *script,
                                           zend_file_cache_metainfo *info,
                                           void                     *buf)
{
  zend_function *func;
  SERIALIZE_PTR(Z_PTR_P(zv));
  func = Z_PTR_P(zv);
  UNSERIALIZE_PTR(func);
  ZEND_ASSERT(func->type == ZEND_USER_FUNCTION);
  zend_file_cache_serialize_op_array(&func->op_array, script, info, buf);
}

static void zend_file_cache_serialize_prop_info(zval                     *zv,
                                                zend_persistent_script   *script,
                                                zend_file_cache_metainfo *info,
                                                void                     *buf)
{
  if (!IS_SERIALIZED(Z_PTR_P(zv))) {
    zend_property_info *prop;

    SERIALIZE_PTR(Z_PTR_P(zv));
    prop = Z_PTR_P(zv);
    UNSERIALIZE_PTR(prop);

    ZEND_ASSERT(prop->ce != NULL && prop->name != NULL);
    if (!IS_SERIALIZED(prop->ce)) {
      SERIALIZE_PTR(prop->ce);
      SERIALIZE_STR(prop->name);
      if (prop->doc_comment) {
        SERIALIZE_STR(prop->doc_comment);
      }
      SERIALIZE_ATTRIBUTES(prop->attributes);
      SERIALIZE_PTR(prop->prototype);
      if (prop->hooks) {
        SERIALIZE_PTR(prop->hooks);
        zend_function **hooks = prop->hooks;
        UNSERIALIZE_PTR(hooks);
        for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
          if (hooks[i]) {
            SERIALIZE_PTR(hooks[i]);
            zend_function *hook = hooks[i];
            UNSERIALIZE_PTR(hook);
            zend_file_cache_serialize_op_array(&hook->op_array, script, info, buf);
          }
        }
      }
      zend_file_cache_serialize_type(&prop->type, script, info, buf);
    }
  }
}

static void zend_file_cache_serialize_class_constant(zval                     *zv,
                                                     zend_persistent_script   *script,
                                                     zend_file_cache_metainfo *info,
                                                     void                     *buf)
{
  if (!IS_SERIALIZED(Z_PTR_P(zv))) {
    zend_class_constant *c;

    SERIALIZE_PTR(Z_PTR_P(zv));
    c = Z_PTR_P(zv);
    UNSERIALIZE_PTR(c);

    ZEND_ASSERT(c->ce != NULL);
    if (!IS_SERIALIZED(c->ce)) {
      SERIALIZE_PTR(c->ce);

      zend_file_cache_serialize_zval(&c->value, script, info, buf);
      if (c->doc_comment) {
        SERIALIZE_STR(c->doc_comment);
      }

      SERIALIZE_ATTRIBUTES(c->attributes);
      zend_file_cache_serialize_type(&c->type, script, info, buf);
    }
  }
}

static void zend_file_cache_serialize_class(zval                     *zv,
                                            zend_persistent_script   *script,
                                            zend_file_cache_metainfo *info,
                                            void                     *buf)
{
  zend_class_entry *ce;

  SERIALIZE_PTR(Z_PTR_P(zv));
  ce = Z_PTR_P(zv);
  UNSERIALIZE_PTR(ce);

  SERIALIZE_STR(ce->name);
  if (ce->parent) {
    if (!(ce->ce_flags & ZEND_ACC_LINKED)) {
      SERIALIZE_STR(ce->parent_name);
    } else {
      SERIALIZE_PTR(ce->parent);
    }
  }
  zend_file_cache_serialize_hash(&ce->function_table, script, info, buf, zend_file_cache_serialize_func);
  if (ce->default_properties_table) {
    zval *p, *end;

    SERIALIZE_PTR(ce->default_properties_table);
    p = ce->default_properties_table;
    UNSERIALIZE_PTR(p);
    end = p + ce->default_properties_count;
    while (p < end) {
      zend_file_cache_serialize_zval(p, script, info, buf);
      p++;
    }
  }
  if (ce->default_static_members_table) {
    zval *p, *end;

    SERIALIZE_PTR(ce->default_static_members_table);
    p = ce->default_static_members_table;
    UNSERIALIZE_PTR(p);

    end = p + ce->default_static_members_count;
    while (p < end) {
      zend_file_cache_serialize_zval(p, script, info, buf);
      p++;
    }
  }
  zend_file_cache_serialize_hash(&ce->constants_table, script, info, buf, zend_file_cache_serialize_class_constant);
  SERIALIZE_STR(ce->info.user.filename);
  SERIALIZE_STR(ce->doc_comment);
  SERIALIZE_ATTRIBUTES(ce->attributes);
  zend_file_cache_serialize_hash(&ce->properties_info, script, info, buf, zend_file_cache_serialize_prop_info);

  if (ce->properties_info_table) {
    uint32_t i;
    zend_property_info **table;

    SERIALIZE_PTR(ce->properties_info_table);
    table = ce->properties_info_table;
    UNSERIALIZE_PTR(table);

    for (i = 0; i < ce->default_properties_count; i++) {
      SERIALIZE_PTR(table[i]);
    }
  }

  if (ce->num_interfaces) {
    uint32_t i;
    zend_class_name *interface_names;

    ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_LINKED));

    SERIALIZE_PTR(ce->interface_names);
    interface_names = ce->interface_names;
    UNSERIALIZE_PTR(interface_names);

    for (i = 0; i < ce->num_interfaces; i++) {
      SERIALIZE_STR(interface_names[i].name);
      SERIALIZE_STR(interface_names[i].lc_name);
    }
  }

  if (ce->num_traits) {
    uint32_t i;
    zend_class_name *trait_names;

    SERIALIZE_PTR(ce->trait_names);
    trait_names = ce->trait_names;
    UNSERIALIZE_PTR(trait_names);

    for (i = 0; i < ce->num_traits; i++) {
      SERIALIZE_STR(trait_names[i].name);
      SERIALIZE_STR(trait_names[i].lc_name);
    }

    if (ce->trait_aliases) {
      zend_trait_alias **p, *q;

      SERIALIZE_PTR(ce->trait_aliases);
      p = ce->trait_aliases;
      UNSERIALIZE_PTR(p);

      while (*p) {
        SERIALIZE_PTR(*p);
        q = *p;
        UNSERIALIZE_PTR(q);

        if (q->trait_method.method_name) {
          SERIALIZE_STR(q->trait_method.method_name);
        }
        if (q->trait_method.class_name) {
          SERIALIZE_STR(q->trait_method.class_name);
        }

        if (q->alias) {
          SERIALIZE_STR(q->alias);
        }
        p++;
      }
    }

    if (ce->trait_precedences) {
      zend_trait_precedence **p, *q;
      uint32_t j;

      SERIALIZE_PTR(ce->trait_precedences);
      p = ce->trait_precedences;
      UNSERIALIZE_PTR(p);

      while (*p) {
        SERIALIZE_PTR(*p);
        q = *p;
        UNSERIALIZE_PTR(q);

        if (q->trait_method.method_name) {
          SERIALIZE_STR(q->trait_method.method_name);
        }
        if (q->trait_method.class_name) {
          SERIALIZE_STR(q->trait_method.class_name);
        }

        for (j = 0; j < q->num_excludes; j++) {
          SERIALIZE_STR(q->exclude_class_names[j]);
        }
        p++;
      }
    }
  }

  SERIALIZE_PTR(ce->constructor);
  SERIALIZE_PTR(ce->destructor);
  SERIALIZE_PTR(ce->clone);
  SERIALIZE_PTR(ce->__get);
  SERIALIZE_PTR(ce->__set);
  SERIALIZE_PTR(ce->__call);
  SERIALIZE_PTR(ce->__serialize);
  SERIALIZE_PTR(ce->__unserialize);
  SERIALIZE_PTR(ce->__isset);
  SERIALIZE_PTR(ce->__unset);
  SERIALIZE_PTR(ce->__tostring);
  SERIALIZE_PTR(ce->__callstatic);
  SERIALIZE_PTR(ce->__debugInfo);

  if (ce->iterator_funcs_ptr) {
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_new_iterator);
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_rewind);
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_valid);
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_key);
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_current);
    SERIALIZE_PTR(ce->iterator_funcs_ptr->zf_next);
    SERIALIZE_PTR(ce->iterator_funcs_ptr);
  }

  if (ce->arrayaccess_funcs_ptr) {
    SERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetget);
    SERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetexists);
    SERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetset);
    SERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetunset);
    SERIALIZE_PTR(ce->arrayaccess_funcs_ptr);
  }

  ZEND_MAP_PTR_INIT(ce->static_members_table, NULL);
  ZEND_MAP_PTR_INIT(ce->mutable_data, NULL);

  ce->inheritance_cache = NULL;

  if (ce->get_iterator) {
    ZEND_ASSERT(ce->get_iterator == zend_hooked_object_get_iterator);
    ce->get_iterator = HOOKED_ITERATOR_PLACEHOLDER;
  }
}

static void zend_file_cache_serialize_warnings(
    zend_persistent_script *script, zend_file_cache_metainfo *info, void *buf)
{
  if (script->warnings) {
    zend_error_info **warnings;
    SERIALIZE_PTR(script->warnings);
    warnings = script->warnings;
    UNSERIALIZE_PTR(warnings);

    for (uint32_t i = 0; i < script->num_warnings; i++) {
      zend_error_info *warning;
      SERIALIZE_PTR(warnings[i]);
      warning = warnings[i];
      UNSERIALIZE_PTR(warning);
      SERIALIZE_STR(warning->filename);
      SERIALIZE_STR(warning->message);
    }
  }
}

static void zend_file_cache_serialize_early_bindings(
    zend_persistent_script *script, zend_file_cache_metainfo *info, void *buf)
{
  if (script->early_bindings) {
    SERIALIZE_PTR(script->early_bindings);
    zend_early_binding *early_bindings = script->early_bindings;
    UNSERIALIZE_PTR(early_bindings);
    for (uint32_t i = 0; i < script->num_early_bindings; i++) {
      SERIALIZE_STR(early_bindings[i].lcname);
      SERIALIZE_STR(early_bindings[i].rtd_key);
      SERIALIZE_STR(early_bindings[i].lc_parent_name);
    }
  }
}

static void zend_file_cache_serialize(zend_persistent_script   *script,
                                      zend_file_cache_metainfo *info,
                                      void                     *buf)
{
  zend_persistent_script *new_script;

  memcpy(info->magic, "OPCACHE", 8);
  memcpy(info->system_id, zend_system_id, 32);
  info->mem_size = script->size;
  info->str_size = 0;
  info->script_offset = (char*)script - (char*)script->mem;
  info->timestamp = script->timestamp;

  memcpy(buf, script->mem, script->size);

  new_script = (zend_persistent_script*)((char*)buf + info->script_offset);
  SERIALIZE_STR(new_script->script.filename);

  zend_file_cache_serialize_hash(&new_script->script.class_table, script, info, buf, zend_file_cache_serialize_class);
  zend_file_cache_serialize_hash(&new_script->script.function_table, script, info, buf, zend_file_cache_serialize_func);
  zend_file_cache_serialize_op_array(&new_script->script.main_op_array, script, info, buf);
  zend_file_cache_serialize_warnings(new_script, info, buf);
  zend_file_cache_serialize_early_bindings(new_script, info, buf);

  new_script->mem = NULL;
}

static char *zend_file_cache_get_bin_file_path(zend_string *script_path)
{
  size_t len;
  char *filename;

#ifndef ZEND_WIN32
  len = strlen(ZCG(accel_directives).file_cache);
  filename = emalloc(len + 33 + ZSTR_LEN(script_path) + sizeof(SUFFIX));
  memcpy(filename, ZCG(accel_directives).file_cache, len);
  filename[len] = '/';
  memcpy(filename + len + 1, zend_system_id, 32);
  memcpy(filename + len + 33, ZSTR_VAL(script_path), ZSTR_LEN(script_path));
  memcpy(filename + len + 33 + ZSTR_LEN(script_path), SUFFIX, sizeof(SUFFIX));
#else
  len = strlen(ZCG(accel_directives).file_cache);

  filename = emalloc(len + 33 + 33 + ZSTR_LEN(script_path) + sizeof(SUFFIX));

  memcpy(filename, ZCG(accel_directives).file_cache, len);
  filename[len] = '\\';
  memcpy(filename + 1 + len, accel_uname_id, 32);
  len += 1 + 32;
  filename[len] = '\\';

  memcpy(filename + len + 1, zend_system_id, 32);

  if (ZSTR_LEN(script_path) >= 7 && ':' == ZSTR_VAL(script_path)[4] && '/' == ZSTR_VAL(script_path)[5]  && '/' == ZSTR_VAL(script_path)[6]) {
    /* phar:// or file:// */
    *(filename + len + 33) = '\\';
    memcpy(filename + len + 34, ZSTR_VAL(script_path), 4);
    if (ZSTR_LEN(script_path) - 7 >= 2 && ':' == ZSTR_VAL(script_path)[8]) {
      *(filename + len + 38) = '\\';
      *(filename + len + 39) = ZSTR_VAL(script_path)[7];
      memcpy(filename + len + 40, ZSTR_VAL(script_path) + 9, ZSTR_LEN(script_path) - 9);
      memcpy(filename + len + 40 + ZSTR_LEN(script_path) - 9, SUFFIX, sizeof(SUFFIX));
    } else {
      memcpy(filename + len + 38, ZSTR_VAL(script_path) + 7, ZSTR_LEN(script_path) - 7);
      memcpy(filename + len + 38 + ZSTR_LEN(script_path) - 7, SUFFIX, sizeof(SUFFIX));
    }
  } else if (ZSTR_LEN(script_path) >= 2 && ':' == ZSTR_VAL(script_path)[1]) {
    /* local fs */
    *(filename + len + 33) = '\\';
    *(filename + len + 34) = ZSTR_VAL(script_path)[0];
    memcpy(filename + len + 35, ZSTR_VAL(script_path) + 2, ZSTR_LEN(script_path) - 2);
    memcpy(filename + len + 35 + ZSTR_LEN(script_path) - 2, SUFFIX, sizeof(SUFFIX));
  } else {
    /* network path */
    memcpy(filename + len + 33, ZSTR_VAL(script_path), ZSTR_LEN(script_path));
    memcpy(filename + len + 33 + ZSTR_LEN(script_path), SUFFIX, sizeof(SUFFIX));
  }
#endif

  return filename;
}

/**
 * Helper function for zend_file_cache_script_store().
 *
 * @return true on success, false on error and errno is set to indicate the cause of the error
 */
static bool zend_file_cache_script_write(int fd, const zend_persistent_script *script, const zend_file_cache_metainfo *info, const void *buf, const zend_string *s)
{
  ssize_t written;
  const ssize_t total_size = (ssize_t)(sizeof(*info) + script->size + info->str_size);

#ifdef HAVE_SYS_UIO_H
  const struct iovec vec[] = {
    { .iov_base = (void *)info, .iov_len = sizeof(*info) },
    { .iov_base = (void *)buf, .iov_len = script->size },
    { .iov_base = (void *)ZSTR_VAL(s), .iov_len = info->str_size },
  };

  written = writev(fd, vec, sizeof(vec) / sizeof(vec[0]));
  if (EXPECTED(written == total_size)) {
    return true;
  }

  errno = written == -1 ? errno : EAGAIN;
  return false;
#else
  if (UNEXPECTED(ZEND_LONG_MAX < (zend_long)total_size)) {
# ifdef EFBIG
    errno = EFBIG;
# else
    errno = ERANGE;
# endif
    return false;
  }

  written = write(fd, info, sizeof(*info));
  if (UNEXPECTED(written != sizeof(*info))) {
    errno = written == -1 ? errno : EAGAIN;
    return false;
  }

  written = write(fd, buf, script->size);
  if (UNEXPECTED(written != script->size)) {
    errno = written == -1 ? errno : EAGAIN;
    return false;
  }

  written = write(fd, ZSTR_VAL(s), info->str_size);
  if (UNEXPECTED(written != info->str_size)) {
    errno = written == -1 ? errno : EAGAIN;
    return false;
  }

  return true;
#endif
}

int zend_file_cache_script_store(zend_persistent_script *script, bool in_shm)
{
  int fd;
  char *filename;
  zend_file_cache_metainfo info;
  void *mem, *buf;

#ifdef HAVE_JIT
  /* FIXME: dump jited codes out to file cache? */
  if (JIT_G(on)) {
    return FAILURE;
  }
#endif

  if (ZCG(accel_directives).file_cache_read_only) {
    return FAILURE;
  }

  filename = zend_file_cache_get_bin_file_path(script->script.filename);

  if (zend_file_cache_mkdir(filename, strlen(ZCG(accel_directives).file_cache)) != SUCCESS) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot create directory for file '%s', %s\n", filename, strerror(errno));
    efree(filename);
    return FAILURE;
  }

  fd = zend_file_cache_open(filename, O_CREAT | O_EXCL | O_RDWR | O_BINARY, S_IRUSR | S_IWUSR);
  if (fd < 0) {
    if (errno != EEXIST) {
      zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot create file '%s', %s\n", filename, strerror(errno));
    }
    efree(filename);
    return FAILURE;
  }

  if (zend_file_cache_flock(fd, LOCK_EX) != 0) {
    close(fd);
    efree(filename);
    return FAILURE;
  }

#if defined(__AVX__) || defined(__SSE2__)
  /* Align to 64-byte boundary */
  mem = emalloc(script->size + 64);
  buf = (void*)(((uintptr_t)mem + 63L) & ~63L);
#else
  mem = buf = emalloc(script->size);
#endif

  ZCG(mem) = zend_string_alloc(4096 - (_ZSTR_HEADER_SIZE + 1), 0);

  zend_shared_alloc_init_xlat_table();
  if (!in_shm) {
    script->corrupted = true; /* used to check if script restored to SHM or process memory */
  }
  zend_file_cache_serialize(script, &info, buf);
  if (!in_shm) {
    script->corrupted = false;
  }
  zend_shared_alloc_destroy_xlat_table();

  zend_string *const s = (zend_string*)ZCG(mem);

#if __has_feature(memory_sanitizer)
  /* The buffer may contain uninitialized regions. However, the uninitialized parts will not be
   * used when reading the cache. We should probably still try to get things fully initialized
   * for reproducibility, but for now ignore this issue. */
  __msan_unpoison(&info, sizeof(info));
  __msan_unpoison(buf, script->size);
#endif

  info.checksum = zend_adler32(ADLER32_INIT, buf, script->size);
  info.checksum = zend_adler32(info.checksum, (unsigned char*)ZSTR_VAL(s), info.str_size);

  if (!zend_file_cache_script_write(fd, script, &info, buf, s)) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot write to file '%s': %s\n", filename, strerror(errno));
    zend_string_release_ex(s, 0);
    close(fd);
    efree(mem);
    zend_file_cache_unlink(filename);
    efree(filename);
    return FAILURE;
  }

  zend_string_release_ex(s, 0);
  efree(mem);
  if (zend_file_cache_flock(fd, LOCK_UN) != 0) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot unlock file '%s': %s\n", filename, strerror(errno));
  }
  close(fd);
  efree(filename);

  return SUCCESS;
}

static void zend_file_cache_unserialize_hash(HashTable               *ht,
                                             zend_persistent_script  *script,
                                             void                    *buf,
                                             unserialize_callback_t   func,
                                             dtor_func_t              dtor)
{
  ht->pDestructor = dtor;
  if (HT_FLAGS(ht) & HASH_FLAG_UNINITIALIZED) {
    if (EXPECTED(!file_cache_only)) {
      HT_SET_DATA_ADDR(ht, &ZCSG(uninitialized_bucket));
    } else {
      HT_SET_DATA_ADDR(ht, &uninitialized_bucket);
    }
    return;
  }
  if (IS_UNSERIALIZED(ht->arData)) {
    return;
  }
  UNSERIALIZE_PTR(ht->arData);
  if (HT_IS_PACKED(ht)) {
    zval *p, *end;

    p = ht->arPacked;
    end = p + ht->nNumUsed;
    while (p < end) {
      if (Z_TYPE_P(p) != IS_UNDEF) {
        func(p, script, buf);
      }
      p++;
    }
  } else {
    Bucket *p, *end;

    p = ht->arData;
    end = p + ht->nNumUsed;
    while (p < end) {
      if (Z_TYPE(p->val) != IS_UNDEF) {
        UNSERIALIZE_STR(p->key);
        func(&p->val, script, buf);
      }
      p++;
    }
  }
}

static void zend_file_cache_unserialize_ast(zend_ast                *ast,
                                            zend_persistent_script  *script,
                                            void                    *buf)
{
  uint32_t i;

  if (ast->kind == ZEND_AST_ZVAL || ast->kind == ZEND_AST_CONSTANT) {
    zend_file_cache_unserialize_zval(&((zend_ast_zval*)ast)->val, script, buf);
  } else if (zend_ast_is_list(ast)) {
    zend_ast_list *list = zend_ast_get_list(ast);
    for (i = 0; i < list->children; i++) {
      if (list->child[i] && !IS_UNSERIALIZED(list->child[i])) {
        UNSERIALIZE_PTR(list->child[i]);
        zend_file_cache_unserialize_ast(list->child[i], script, buf);
      }
    }
  } else if (ast->kind == ZEND_AST_OP_ARRAY) {
    zval z;
    ZVAL_PTR(&z, zend_ast_get_op_array(ast)->op_array);
    zend_file_cache_unserialize_func(&z, script, buf);
    zend_ast_get_op_array(ast)->op_array = Z_PTR(z);
  } else if (ast->kind == ZEND_AST_CALLABLE_CONVERT) {
    zend_ast_fcc *fcc = (zend_ast_fcc*)ast;
    if (script->corrupted) {
      fcc->attr &= ~ZEND_PARTIAL_CACHEABLE_IN_SHM;
    } else {
      ZEND_MAP_PTR_NEW(fcc->fptr);
    }
    UNSERIALIZE_STR(fcc->filename);
    UNSERIALIZE_STR(fcc->name);
    if (!IS_UNSERIALIZED(fcc->args)) {
      UNSERIALIZE_PTR(fcc->args);
      zend_file_cache_unserialize_ast(fcc->args, script, buf);
    }
  } else if (zend_ast_is_decl(ast)) {
    /* Not implemented. */
    ZEND_UNREACHABLE();
  } else {
    uint32_t children = zend_ast_get_num_children(ast);
    for (i = 0; i < children; i++) {
      if (ast->child[i] && !IS_UNSERIALIZED(ast->child[i])) {
        UNSERIALIZE_PTR(ast->child[i]);
        zend_file_cache_unserialize_ast(ast->child[i], script, buf);
      }
    }
  }
}

static void zend_file_cache_unserialize_zval(zval                    *zv,
                                             zend_persistent_script  *script,
                                             void                    *buf)
{
  switch (Z_TYPE_P(zv)) {
    case IS_STRING:
      /* We can't use !IS_UNSERIALIZED here, because that does not recognize unserialized
       * interned strings in non-shm mode. */
      if (IS_SERIALIZED(Z_STR_P(zv)) || IS_SERIALIZED_INTERNED(Z_STR_P(zv))) {
        UNSERIALIZE_STR(Z_STR_P(zv));
      }
      break;
    case IS_ARRAY:
      if (!IS_UNSERIALIZED(Z_ARR_P(zv))) {
        HashTable *ht;

        UNSERIALIZE_PTR(Z_ARR_P(zv));
        ht = Z_ARR_P(zv);
        zend_file_cache_unserialize_hash(ht,
            script, buf, zend_file_cache_unserialize_zval, ZVAL_PTR_DTOR);
      }
      break;
    case IS_CONSTANT_AST:
      if (!IS_UNSERIALIZED(Z_AST_P(zv))) {
        UNSERIALIZE_PTR(Z_AST_P(zv));
        zend_file_cache_unserialize_ast(Z_ASTVAL_P(zv), script, buf);
      }
      break;
    case IS_INDIRECT:
      /* Used by static properties. */
      UNSERIALIZE_PTR(Z_INDIRECT_P(zv));
      break;
    case IS_PTR:
      /* Used by attributes on constants, will be handled separately */
      break;
    default:
      ZEND_ASSERT(Z_TYPE_P(zv) < IS_STRING);
      break;
  }
}

static void zend_file_cache_unserialize_attribute(zval *zv, zend_persistent_script *script, void *buf)
{
  zend_attribute *attr;
  uint32_t i;

  UNSERIALIZE_PTR(Z_PTR_P(zv));
  attr = Z_PTR_P(zv);

  UNSERIALIZE_STR(attr->name);
  UNSERIALIZE_STR(attr->lcname);
  UNSERIALIZE_STR(attr->validation_error);

  for (i = 0; i < attr->argc; i++) {
    UNSERIALIZE_STR(attr->args[i].name);
    zend_file_cache_unserialize_zval(&attr->args[i].value, script, buf);
  }
}

static void zend_file_cache_unserialize_type(
    zend_type *type, zend_class_entry *scope, zend_persistent_script *script, void *buf)
{
  if (ZEND_TYPE_HAS_LIST(*type)) {
    zend_type_list *list = ZEND_TYPE_LIST(*type);
    UNSERIALIZE_PTR(list);
    ZEND_TYPE_SET_PTR(*type, list);

    zend_type *list_type;
    ZEND_TYPE_LIST_FOREACH_MUTABLE(list, list_type) {
      zend_file_cache_unserialize_type(list_type, scope, script, buf);
    } ZEND_TYPE_LIST_FOREACH_END();
  } else if (ZEND_TYPE_HAS_NAME(*type)) {
    zend_string *type_name = ZEND_TYPE_NAME(*type);
    UNSERIALIZE_STR(type_name);
    ZEND_TYPE_SET_PTR(*type, type_name);
    if (!script->corrupted) {
      zend_accel_get_class_name_map_ptr(type_name);
    } else {
      zend_alloc_ce_cache(type_name);
    }
  }
}

static void zend_file_cache_unserialize_op_array(zend_op_array           *op_array,
                                                 zend_persistent_script  *script,
                                                 void                    *buf)
{
  if (!script->corrupted) {
    if (op_array != &script->script.main_op_array) {
      op_array->fn_flags |= ZEND_ACC_IMMUTABLE;
      ZEND_MAP_PTR_NEW(op_array->run_time_cache);
    } else {
      ZEND_ASSERT(!(op_array->fn_flags & ZEND_ACC_IMMUTABLE));
      ZEND_MAP_PTR_INIT(op_array->run_time_cache, NULL);
    }
    if (op_array->static_variables) {
      ZEND_MAP_PTR_NEW(op_array->static_variables_ptr);
    }
  } else {
    op_array->fn_flags &= ~ZEND_ACC_IMMUTABLE;
    ZEND_MAP_PTR_INIT(op_array->static_variables_ptr, NULL);
    ZEND_MAP_PTR_INIT(op_array->run_time_cache, NULL);
  }

  /* Check whether this op_array has already been unserialized. */
  if (IS_UNSERIALIZED(op_array->opcodes)) {
    ZEND_ASSERT(op_array->scope && "Only method op_arrays should be shared");
    return;
  }

  if (op_array->refcount) {
    op_array->refcount = NULL;
    UNSERIALIZE_PTR(op_array->static_variables);
    UNSERIALIZE_PTR(op_array->literals);
    UNSERIALIZE_PTR(op_array->opcodes);
    UNSERIALIZE_PTR(op_array->arg_info);
    UNSERIALIZE_PTR(op_array->vars);
    UNSERIALIZE_STR(op_array->function_name);
    UNSERIALIZE_STR(op_array->filename);
    UNSERIALIZE_PTR(op_array->live_range);
    UNSERIALIZE_PTR(op_array->scope);
    UNSERIALIZE_STR(op_array->doc_comment);
    UNSERIALIZE_ATTRIBUTES(op_array->attributes);
    UNSERIALIZE_PTR(op_array->try_catch_array);
    UNSERIALIZE_PTR(op_array->prototype);
    UNSERIALIZE_PTR(op_array->prop_info);
    return;
  }

  if (op_array->static_variables) {
    HashTable *ht;

    UNSERIALIZE_PTR(op_array->static_variables);
    ht = op_array->static_variables;
    zend_file_cache_unserialize_hash(ht,
        script, buf, zend_file_cache_unserialize_zval, ZVAL_PTR_DTOR);
  }

  if (op_array->literals) {
    zval *p, *end;

    UNSERIALIZE_PTR(op_array->literals);
    p = op_array->literals;
    end = p + op_array->last_literal;
    while (p < end) {
      zend_file_cache_unserialize_zval(p, script, buf);
      p++;
    }
  }

  {
    zend_op *opline, *end;

    UNSERIALIZE_PTR(op_array->opcodes);
    opline = op_array->opcodes;
    end = opline + op_array->last;
    while (opline < end) {
#if ZEND_USE_ABS_CONST_ADDR
      if (opline->op1_type == IS_CONST) {
        UNSERIALIZE_PTR(opline->op1.zv);
      }
      if (opline->op2_type == IS_CONST) {
        UNSERIALIZE_PTR(opline->op2.zv);
      }
#else
      if (opline->op1_type == IS_CONST) {
        ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op1);
      }
      if (opline->op2_type == IS_CONST) {
        ZEND_PASS_TWO_UPDATE_CONSTANT(op_array, opline, opline->op2);
      }
#endif
#if ZEND_USE_ABS_JMP_ADDR
      switch (opline->opcode) {
        case ZEND_JMP:
        case ZEND_FAST_CALL:
          UNSERIALIZE_PTR(opline->op1.jmp_addr);
          break;
        case ZEND_JMPZ:
        case ZEND_JMPNZ:
        case ZEND_JMPZ_EX:
        case ZEND_JMPNZ_EX:
        case ZEND_JMP_SET:
        case ZEND_COALESCE:
        case ZEND_FE_RESET_R:
        case ZEND_FE_RESET_RW:
        case ZEND_ASSERT_CHECK:
        case ZEND_JMP_NULL:
        case ZEND_BIND_INIT_STATIC_OR_JMP:
        case ZEND_JMP_FRAMELESS:
          UNSERIALIZE_PTR(opline->op2.jmp_addr);
          break;
        case ZEND_CATCH:
          if (!(opline->extended_value & ZEND_LAST_CATCH)) {
            UNSERIALIZE_PTR(opline->op2.jmp_addr);
          }
          break;
        case ZEND_FE_FETCH_R:
        case ZEND_FE_FETCH_RW:
        case ZEND_SWITCH_LONG:
        case ZEND_SWITCH_STRING:
          /* relative extended_value don't have to be changed */
          break;
      }
#endif

      if (opline->opcode == ZEND_OP_DATA
        && (opline-1)->opcode == ZEND_DECLARE_ATTRIBUTED_CONST
      ) {
        zval *literal = RT_CONSTANT(opline, opline->op1);
        UNSERIALIZE_ATTRIBUTES(Z_PTR_P(literal));
      }

      if (opline->opcode == ZEND_CALLABLE_CONVERT_PARTIAL) {
        if (script->corrupted) {
          opline->extended_value &= ~ZEND_PARTIAL_CACHEABLE_IN_SHM;
        }
      }

      zend_deserialize_opcode_handler(opline);
      opline++;
    }

    UNSERIALIZE_PTR(op_array->scope);

    if (op_array->arg_info) {
      zend_arg_info *p, *end;
      UNSERIALIZE_PTR(op_array->arg_info);
      p = op_array->arg_info;
      end = p + op_array->num_args;
      if (op_array->fn_flags & ZEND_ACC_HAS_RETURN_TYPE) {
        p--;
      }
      if (op_array->fn_flags & ZEND_ACC_VARIADIC) {
        end++;
      }
      while (p < end) {
        if (!IS_UNSERIALIZED(p->name)) {
          UNSERIALIZE_STR(p->name);
        }
        zend_file_cache_unserialize_type(&p->type, (op_array->fn_flags & ZEND_ACC_CLOSURE) ? NULL : op_array->scope, script, buf);
        UNSERIALIZE_STR(p->doc_comment);
        p++;
      }
    }

    if (op_array->vars) {
      zend_string **p, **end;

      UNSERIALIZE_PTR(op_array->vars);
      p = op_array->vars;
      end = p + op_array->last_var;
      while (p < end) {
        if (!IS_UNSERIALIZED(*p)) {
          UNSERIALIZE_STR(*p);
        }
        p++;
      }
    }

    if (op_array->num_dynamic_func_defs) {
      UNSERIALIZE_PTR(op_array->dynamic_func_defs);
      for (uint32_t i = 0; i < op_array->num_dynamic_func_defs; i++) {
        UNSERIALIZE_PTR(op_array->dynamic_func_defs[i]);
        zend_file_cache_unserialize_op_array(op_array->dynamic_func_defs[i], script, buf);
      }
    }

    UNSERIALIZE_STR(op_array->function_name);
    UNSERIALIZE_STR(op_array->filename);
    UNSERIALIZE_PTR(op_array->live_range);
    UNSERIALIZE_STR(op_array->doc_comment);
    UNSERIALIZE_ATTRIBUTES(op_array->attributes);
    UNSERIALIZE_PTR(op_array->try_catch_array);
    UNSERIALIZE_PTR(op_array->prototype);
    UNSERIALIZE_PTR(op_array->prop_info);
  }
}

static void zend_file_cache_unserialize_func(zval                    *zv,
                                             zend_persistent_script  *script,
                                             void                    *buf)
{
  zend_function *func;
  UNSERIALIZE_PTR(Z_PTR_P(zv));
  func = Z_PTR_P(zv);
  ZEND_ASSERT(func->type == ZEND_USER_FUNCTION);
  zend_file_cache_unserialize_op_array(&func->op_array, script, buf);
}

static void zend_file_cache_unserialize_prop_info(zval                    *zv,
                                                  zend_persistent_script  *script,
                                                  void                    *buf)
{
  if (!IS_UNSERIALIZED(Z_PTR_P(zv))) {
    zend_property_info *prop;

    UNSERIALIZE_PTR(Z_PTR_P(zv));
    prop = Z_PTR_P(zv);

    ZEND_ASSERT(prop->ce != NULL && prop->name != NULL);
    if (!IS_UNSERIALIZED(prop->ce)) {
      UNSERIALIZE_PTR(prop->ce);
      UNSERIALIZE_STR(prop->name);
      if (prop->doc_comment) {
        UNSERIALIZE_STR(prop->doc_comment);
      }
      UNSERIALIZE_ATTRIBUTES(prop->attributes);
      UNSERIALIZE_PTR(prop->prototype);
      if (prop->hooks) {
        UNSERIALIZE_PTR(prop->hooks);
        for (uint32_t i = 0; i < ZEND_PROPERTY_HOOK_COUNT; i++) {
          if (prop->hooks[i]) {
            UNSERIALIZE_PTR(prop->hooks[i]);
            zend_file_cache_unserialize_op_array(&prop->hooks[i]->op_array, script, buf);
          }
        }
      }
      zend_file_cache_unserialize_type(&prop->type, prop->ce, script, buf);
    }
  }
}

static void zend_file_cache_unserialize_class_constant(zval                    *zv,
                                                       zend_persistent_script  *script,
                                                       void                    *buf)
{
  if (!IS_UNSERIALIZED(Z_PTR_P(zv))) {
    zend_class_constant *c;

    UNSERIALIZE_PTR(Z_PTR_P(zv));
    c = Z_PTR_P(zv);

    ZEND_ASSERT(c->ce != NULL);
    if (!IS_UNSERIALIZED(c->ce)) {
      UNSERIALIZE_PTR(c->ce);

      zend_file_cache_unserialize_zval(&c->value, script, buf);

      if (c->doc_comment) {
        UNSERIALIZE_STR(c->doc_comment);
      }
      UNSERIALIZE_ATTRIBUTES(c->attributes);
      zend_file_cache_unserialize_type(&c->type, c->ce, script, buf);
    }
  }
}

static void zend_file_cache_unserialize_class(zval                    *zv,
                                              zend_persistent_script  *script,
                                              void                    *buf)
{
  zend_class_entry *ce;

  UNSERIALIZE_PTR(Z_PTR_P(zv));
  ce = Z_PTR_P(zv);

  UNSERIALIZE_STR(ce->name);
  if (!(ce->ce_flags & ZEND_ACC_ANON_CLASS)) {
    if (!script->corrupted) {
      zend_accel_get_class_name_map_ptr(ce->name);
    } else {
      zend_alloc_ce_cache(ce->name);
    }
  }
  if (ce->parent) {
    if (!(ce->ce_flags & ZEND_ACC_LINKED)) {
      UNSERIALIZE_STR(ce->parent_name);
    } else {
      UNSERIALIZE_PTR(ce->parent);
    }
  }
  zend_file_cache_unserialize_hash(&ce->function_table,
      script, buf, zend_file_cache_unserialize_func, ZEND_FUNCTION_DTOR);
  if (ce->default_properties_table) {
    zval *p, *end;

    UNSERIALIZE_PTR(ce->default_properties_table);
    p = ce->default_properties_table;
    end = p + ce->default_properties_count;
    while (p < end) {
      zend_file_cache_unserialize_zval(p, script, buf);
      p++;
    }
  }
  if (ce->default_static_members_table) {
    zval *p, *end;
    UNSERIALIZE_PTR(ce->default_static_members_table);
    p = ce->default_static_members_table;
    end = p + ce->default_static_members_count;
    while (p < end) {
      zend_file_cache_unserialize_zval(p, script, buf);
      p++;
    }
  }
  zend_file_cache_unserialize_hash(&ce->constants_table,
      script, buf, zend_file_cache_unserialize_class_constant, NULL);
  UNSERIALIZE_STR(ce->info.user.filename);
  UNSERIALIZE_STR(ce->doc_comment);
  UNSERIALIZE_ATTRIBUTES(ce->attributes);
  zend_file_cache_unserialize_hash(&ce->properties_info,
      script, buf, zend_file_cache_unserialize_prop_info, NULL);

  if (ce->properties_info_table) {
    uint32_t i;
    UNSERIALIZE_PTR(ce->properties_info_table);

    for (i = 0; i < ce->default_properties_count; i++) {
      UNSERIALIZE_PTR(ce->properties_info_table[i]);
    }
  }

  if (ce->num_interfaces) {
    uint32_t i;

    ZEND_ASSERT(!(ce->ce_flags & ZEND_ACC_LINKED));
    UNSERIALIZE_PTR(ce->interface_names);

    for (i = 0; i < ce->num_interfaces; i++) {
      UNSERIALIZE_STR(ce->interface_names[i].name);
      UNSERIALIZE_STR(ce->interface_names[i].lc_name);
    }
  }

  if (ce->num_traits) {
    uint32_t i;

    UNSERIALIZE_PTR(ce->trait_names);

    for (i = 0; i < ce->num_traits; i++) {
      UNSERIALIZE_STR(ce->trait_names[i].name);
      UNSERIALIZE_STR(ce->trait_names[i].lc_name);
    }

    if (ce->trait_aliases) {
      zend_trait_alias **p, *q;

      UNSERIALIZE_PTR(ce->trait_aliases);
      p = ce->trait_aliases;

      while (*p) {
        UNSERIALIZE_PTR(*p);
        q = *p;

        if (q->trait_method.method_name) {
          UNSERIALIZE_STR(q->trait_method.method_name);
        }
        if (q->trait_method.class_name) {
          UNSERIALIZE_STR(q->trait_method.class_name);
        }

        if (q->alias) {
          UNSERIALIZE_STR(q->alias);
        }
        p++;
      }
    }

    if (ce->trait_precedences) {
      zend_trait_precedence **p, *q;
      uint32_t j;

      UNSERIALIZE_PTR(ce->trait_precedences);
      p = ce->trait_precedences;

      while (*p) {
        UNSERIALIZE_PTR(*p);
        q = *p;

        if (q->trait_method.method_name) {
          UNSERIALIZE_STR(q->trait_method.method_name);
        }
        if (q->trait_method.class_name) {
          UNSERIALIZE_STR(q->trait_method.class_name);
        }

        for (j = 0; j < q->num_excludes; j++) {
          UNSERIALIZE_STR(q->exclude_class_names[j]);
        }
        p++;
      }
    }
  }

  UNSERIALIZE_PTR(ce->constructor);
  UNSERIALIZE_PTR(ce->destructor);
  UNSERIALIZE_PTR(ce->clone);
  UNSERIALIZE_PTR(ce->__get);
  UNSERIALIZE_PTR(ce->__set);
  UNSERIALIZE_PTR(ce->__call);
  UNSERIALIZE_PTR(ce->__serialize);
  UNSERIALIZE_PTR(ce->__unserialize);
  UNSERIALIZE_PTR(ce->__isset);
  UNSERIALIZE_PTR(ce->__unset);
  UNSERIALIZE_PTR(ce->__tostring);
  UNSERIALIZE_PTR(ce->__callstatic);
  UNSERIALIZE_PTR(ce->__debugInfo);

  if (ce->iterator_funcs_ptr) {
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_new_iterator);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_rewind);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_valid);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_key);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_current);
    UNSERIALIZE_PTR(ce->iterator_funcs_ptr->zf_next);
  }
  if (ce->arrayaccess_funcs_ptr) {
    UNSERIALIZE_PTR(ce->arrayaccess_funcs_ptr);
    UNSERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetget);
    UNSERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetexists);
    UNSERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetset);
    UNSERIALIZE_PTR(ce->arrayaccess_funcs_ptr->zf_offsetunset);
  }

  if (!(script->corrupted)) {
    ce->ce_flags |= ZEND_ACC_IMMUTABLE;
    ce->ce_flags &= ~ZEND_ACC_FILE_CACHED;
    ZEND_MAP_PTR_NEW(ce->mutable_data);
    if (ce->default_static_members_count) {
      ZEND_MAP_PTR_NEW(ce->static_members_table);
    }
  } else {
    ce->ce_flags &= ~ZEND_ACC_IMMUTABLE;
    ce->ce_flags |= ZEND_ACC_FILE_CACHED;
    ZEND_MAP_PTR_INIT(ce->mutable_data, NULL);
    ZEND_MAP_PTR_INIT(ce->static_members_table, NULL);
  }

  if (ce->get_iterator) {
    ZEND_ASSERT(ce->get_iterator == HOOKED_ITERATOR_PLACEHOLDER);
    ce->get_iterator = zend_hooked_object_get_iterator;
  }

  // Memory addresses of object handlers are not stable. They can change due to ASLR or order of linking dynamic. To
  // avoid pointing to invalid memory we relink default_object_handlers here.
  ce->default_object_handlers = ce->ce_flags & ZEND_ACC_ENUM ? &zend_enum_object_handlers : &std_object_handlers;
}

static void zend_file_cache_unserialize_warnings(zend_persistent_script *script, void *buf)
{
  if (script->warnings) {
    UNSERIALIZE_PTR(script->warnings);
    for (uint32_t i = 0; i < script->num_warnings; i++) {
      UNSERIALIZE_PTR(script->warnings[i]);
      UNSERIALIZE_STR(script->warnings[i]->filename);
      UNSERIALIZE_STR(script->warnings[i]->message);
    }
  }
}

static void zend_file_cache_unserialize_early_bindings(zend_persistent_script *script, void *buf)
{
  if (script->early_bindings) {
    UNSERIALIZE_PTR(script->early_bindings);
    for (uint32_t i = 0; i < script->num_early_bindings; i++) {
      UNSERIALIZE_STR(script->early_bindings[i].lcname);
      UNSERIALIZE_STR(script->early_bindings[i].rtd_key);
      UNSERIALIZE_STR(script->early_bindings[i].lc_parent_name);
    }
  }
}

static void zend_file_cache_unserialize(zend_persistent_script  *script,
                                        void                    *buf)
{
  script->mem = buf;

  UNSERIALIZE_STR(script->script.filename);

  zend_file_cache_unserialize_hash(&script->script.class_table,
      script, buf, zend_file_cache_unserialize_class, ZEND_CLASS_DTOR);
  zend_file_cache_unserialize_hash(&script->script.function_table,
      script, buf, zend_file_cache_unserialize_func, ZEND_FUNCTION_DTOR);
  zend_file_cache_unserialize_op_array(&script->script.main_op_array, script, buf);
  zend_file_cache_unserialize_warnings(script, buf);
  zend_file_cache_unserialize_early_bindings(script, buf);
}

static zend_persistent_script file_cache_validate_success_script;

zend_persistent_script *zend_file_cache_script_load(zend_file_handle *file_handle)
{
  return zend_file_cache_script_load_ex(file_handle, false);
}

zend_persistent_script *zend_file_cache_script_load_ex(zend_file_handle *file_handle, bool validate_only)
{
  zend_string *full_path = file_handle->opened_path;
  int fd;
  char *filename;
  zend_persistent_script *script;
  zend_file_cache_metainfo info;
  zend_accel_hash_entry *bucket;
  void *mem, *checkpoint, *buf;
  bool cache_it = true;
  unsigned int actual_checksum;
  bool ok;

  if (!full_path) {
    return NULL;
  }
  filename = zend_file_cache_get_bin_file_path(full_path);

  fd = zend_file_cache_open(filename, O_RDONLY | O_BINARY);
  if (fd < 0) {
    efree(filename);
    return NULL;
  }

  if (zend_file_cache_flock(fd, LOCK_SH) != 0) {
    close(fd);
    efree(filename);
    return NULL;
  }

  if (read(fd, &info, sizeof(info)) != sizeof(info)) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot read from file '%s' (info)\n", filename);
    zend_file_cache_flock(fd, LOCK_UN);
    close(fd);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    efree(filename);
    return NULL;
  }

  /* verify header */
  if (memcmp(info.magic, "OPCACHE", 8) != 0) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot read from file '%s' (wrong header)\n", filename);
    zend_file_cache_flock(fd, LOCK_UN);
    close(fd);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    efree(filename);
    return NULL;
  }
  if (memcmp(info.system_id, zend_system_id, 32) != 0) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot read from file '%s' (wrong \"system_id\")\n", filename);
    zend_file_cache_flock(fd, LOCK_UN);
    close(fd);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    efree(filename);
    return NULL;
  }

  /* verify timestamp */
  if (ZCG(accel_directives).validate_timestamps &&
      zend_get_file_handle_timestamp(file_handle, NULL) != info.timestamp) {
    if (zend_file_cache_flock(fd, LOCK_UN) != 0) {
      zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot unlock file '%s'\n", filename);
    }
    close(fd);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    efree(filename);
    return NULL;
  }

  /* return here if validating */
  if (validate_only) {
    if (zend_file_cache_flock(fd, LOCK_UN) != 0) {
      zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot unlock file '%s'\n", filename);
    }
    close(fd);
    efree(filename);
    return &file_cache_validate_success_script;
  }

  checkpoint = zend_arena_checkpoint(CG(arena));
#if defined(__AVX__) || defined(__SSE2__)
  /* Align to 64-byte boundary */
  mem = zend_arena_alloc(&CG(arena), info.mem_size + info.str_size + 64);
  mem = (void*)(((uintptr_t)mem + 63L) & ~63L);
#else
  mem = zend_arena_alloc(&CG(arena), info.mem_size + info.str_size);
#endif

  if (read(fd, mem, info.mem_size + info.str_size) != (ssize_t)(info.mem_size + info.str_size)) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot read from file '%s' (mem)\n", filename);
    zend_file_cache_flock(fd, LOCK_UN);
    close(fd);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    zend_arena_release(&CG(arena), checkpoint);
    efree(filename);
    return NULL;
  }
  if (zend_file_cache_flock(fd, LOCK_UN) != 0) {
    zend_accel_error(ACCEL_LOG_WARNING, "opcache cannot unlock file '%s'\n", filename);
  }
  close(fd);

  /* verify checksum */
  if (ZCG(accel_directives).file_cache_consistency_checks &&
      (actual_checksum = zend_adler32(ADLER32_INIT, mem, info.mem_size + info.str_size)) != info.checksum) {
    zend_accel_error(ACCEL_LOG_WARNING, "corrupted file '%s' excepted checksum: 0x%08x actual checksum: 0x%08x\n", filename, info.checksum, actual_checksum);
    if (!ZCG(accel_directives).file_cache_read_only) {
      zend_file_cache_unlink(filename);
    }
    zend_arena_release(&CG(arena), checkpoint);
    efree(filename);
    return NULL;
  }

  if (!file_cache_only &&
      !ZCSG(restart_in_progress) &&
      !ZCSG(restart_pending) &&
    !ZSMMG(memory_exhausted) &&
      accelerator_shm_read_lock() == SUCCESS) {
    /* 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), full_path);
    if (bucket) {
      script = (zend_persistent_script *)bucket->data;
      if (!script->corrupted) {
        zend_shared_alloc_unlock();
        zend_arena_release(&CG(arena), checkpoint);
        efree(filename);
        return script;
      }
    }

    if (zend_accel_hash_is_full(&ZCSG(hash))) {
      zend_accel_error(ACCEL_LOG_DEBUG, "No more entries in hash table!");
      ZSMMG(memory_exhausted) = 1;
      zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_HASH);
      zend_shared_alloc_unlock();
      goto use_process_mem;
    }

    buf = zend_shared_alloc_aligned(info.mem_size);

    if (!buf) {
      zend_accel_schedule_restart_if_necessary(ACCEL_RESTART_OOM);
      zend_shared_alloc_unlock();
      goto use_process_mem;
    }
    memcpy(buf, mem, info.mem_size);
    zend_map_ptr_extend(ZCSG(map_ptr_last));
  } else {
use_process_mem:
    buf = mem;
    cache_it = false;
  }

  ZCG(mem) = ((char*)mem + info.mem_size);
  script = (zend_persistent_script*)((char*)buf + info.script_offset);
  script->corrupted = !cache_it; /* used to check if script restored to SHM or process memory */

  ok = true;
  zend_try {
    zend_file_cache_unserialize(script, buf);
  } zend_catch {
    ok = false;
  } zend_end_try();
  if (!ok) {
    if (cache_it) {
      zend_shared_alloc_unlock();
      goto use_process_mem;
    } else {
      zend_arena_release(&CG(arena), checkpoint);
      efree(filename);
      return NULL;
    }
  }

  script->corrupted = false;

  if (cache_it) {
    ZCSG(map_ptr_last) = CG(map_ptr_last);
    script->dynamic_members.last_used = ZCG(request_time);

    zend_accel_hash_update(&ZCSG(hash), script->script.filename, 0, script);

    zend_shared_alloc_unlock();
    zend_accel_error(ACCEL_LOG_INFO, "File cached script loaded into memory '%s'", ZSTR_VAL(script->script.filename));

    zend_arena_release(&CG(arena), checkpoint);
  }
  efree(filename);

  return script;
}

void zend_file_cache_invalidate(zend_string *full_path)
{
  if (ZCG(accel_directives).file_cache_read_only) {
    return;
  }

  char *filename;

  filename = zend_file_cache_get_bin_file_path(full_path);

  zend_file_cache_unlink(filename);
  efree(filename);
}

Coverage Report

Created: 2026-09-14 06:25