source: trunk/xcache.c @ 425

#if 0
#define DEBUG
#endif

#if 0
#define SHOW_DPRINT
#endif

/* {{{ macros */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include <signal.h>

#include "php.h"
#include "ext/standard/info.h"
#include "ext/standard/md5.h"
#include "ext/standard/php_math.h"
#include "zend_extensions.h"
#include "SAPI.h"

#include "xcache.h"
#include "optimizer.h"
#include "coverager.h"
#include "disassembler.h"
#include "align.h"
#include "stack.h"
#include "xcache_globals.h"
#include "processor.h"
#include "const_string.h"
#include "opcode_spec.h"
#include "utils.h"

#define VAR_ENTRY_EXPIRED(pentry) ((pentry)->ttl && XG(request_time) > pentry->ctime + (pentry)->ttl)
#define CHECK(x, e) do { if ((x) == NULL) { zend_error(E_ERROR, "XCache: " e); goto err; } } while (0)
#define LOCK(x) xc_lock(x->lck)
#define UNLOCK(x) xc_unlock(x->lck)

#define ENTER_LOCK_EX(x) \
    xc_lock(x->lck); \
    zend_try { \
        do
#define LEAVE_LOCK_EX(x) \
        while (0); \
    } zend_catch { \
        catched = 1; \
    } zend_end_try(); \
    xc_unlock(x->lck)

#define ENTER_LOCK(x) do { \
    int catched = 0; \
    ENTER_LOCK_EX(x)
#define LEAVE_LOCK(x) \
    LEAVE_LOCK_EX(x); \
    if (catched) { \
        zend_bailout(); \
    } \
} while(0)

/* }}} */

/* {{{ globals */
static char *xc_shm_scheme = NULL;
static char *xc_mmap_path = NULL;
static char *xc_coredump_dir = NULL;

static xc_hash_t xc_php_hcache = {0};
static xc_hash_t xc_php_hentry = {0};
static xc_hash_t xc_var_hcache = {0};
static xc_hash_t xc_var_hentry = {0};

static zend_ulong xc_php_ttl    = 0;
static zend_ulong xc_var_maxttl = 0;

enum { xc_deletes_gc_interval = 120 };
static zend_ulong xc_php_gc_interval = 0;
static zend_ulong xc_var_gc_interval = 0;

/* total size */
static zend_ulong xc_php_size  = 0;
static zend_ulong xc_var_size  = 0;

static xc_cache_t **xc_php_caches = NULL;
static xc_cache_t **xc_var_caches = NULL;

static zend_bool xc_initized = 0;
static zend_compile_file_t *origin_compile_file = NULL;
static zend_compile_file_t *old_compile_file = NULL;
static zend_llist_element  *xc_llist_zend_extension = NULL;

static zend_bool xc_test = 0;
static zend_bool xc_readonly_protection = 0;

zend_bool xc_have_op_array_ctor = 0;

static zend_bool xc_module_gotup = 0;
static zend_bool xc_zend_extension_gotup = 0;
static zend_bool xc_zend_extension_faked = 0;
#if !COMPILE_DL_XCACHE
#   define zend_extension_entry xcache_zend_extension_entry
#endif
ZEND_DLEXPORT zend_extension zend_extension_entry;
ZEND_DECLARE_MODULE_GLOBALS(xcache);
/* }}} */

/* any function in *_dmz is only safe be called within locked(single thread) area */

static void xc_php_add_dmz(xc_entry_data_php_t *php) /* {{{ */
{
    xc_entry_data_php_t **head = &(php->cache->phps[php->hvalue]);
    php->next = *head;
    *head = php;
    php->cache->phps_count ++;
}
/* }}} */
static xc_entry_data_php_t *xc_php_store_dmz(xc_entry_data_php_t *php TSRMLS_DC) /* {{{ */
{
    xc_entry_data_php_t *stored_php;

    php->hits     = 0;
    php->refcount = 0;
    stored_php = xc_processor_store_xc_entry_data_php_t(php TSRMLS_CC);
    if (stored_php) {
        xc_php_add_dmz(stored_php);
        return stored_php;
    }
    else {
        php->cache->ooms ++;
        return NULL;
    }
}
/* }}} */
static xc_entry_data_php_t *xc_php_find_dmz(xc_entry_data_php_t *php TSRMLS_DC) /* {{{ */
{
    xc_entry_data_php_t *p;
    for (p = php->cache->phps[php->hvalue]; p; p = p->next) {
        if (memcmp(php->md5, p->md5, sizeof(php->md5)) == 0) {
            p->hits ++;
            return p;
        }
    }
    return NULL;
}
/* }}} */
static void xc_php_free_dmz(xc_entry_data_php_t *php) /* {{{ */
{
    php->cache->mem->handlers->free(php->cache->mem, (xc_entry_data_php_t *)php);
}
/* }}} */
static void xc_php_addref_dmz(xc_entry_data_php_t *php) /* {{{ */
{
    php->refcount ++;
}
/* }}} */
static void xc_php_release_dmz(xc_entry_data_php_t *php) /* {{{ */
{
    if (-- php->refcount == 0) {
        xc_entry_data_php_t **pp = &(php->cache->phps[php->hvalue]);
        xc_entry_data_php_t *p;
        for (p = *pp; p; pp = &(p->next), p = p->next) {
            if (memcmp(php->md5, p->md5, sizeof(php->md5)) == 0) {
                /* unlink */
                *pp = p->next;
                xc_php_free_dmz(php);
                return;
            }
        }
        assert(0);
    }
}
/* }}} */

static inline int xc_entry_equal_dmz(xc_entry_t *a, xc_entry_t *b) /* {{{ */
{
    /* this function isn't required but can be in dmz */

    if (a->type != b->type) {
        return 0;
    }
    switch (a->type) {
        case XC_TYPE_PHP:
#ifdef HAVE_INODE
            do {
                if (a->inode) {
                    return a->inode == b->inode
                        && a->device == b->device;
                }
            } while(0);
#endif
            /* fall */

        case XC_TYPE_VAR:
            do {
#ifdef IS_UNICODE
                if (a->name_type == IS_UNICODE) {
                    if (a->name.ustr.len != b->name.ustr.len) {
                        return 0;
                    }
                    return memcmp(a->name.ustr.val, b->name.ustr.val, (a->name.ustr.len + 1) * sizeof(UChar)) == 0;
                }
                else {
                    return memcmp(a->name.str.val, b->name.str.val, a->name.str.len + 1) == 0;
                }
#else
                return memcmp(a->name.str.val, b->name.str.val, a->name.str.len + 1) == 0;
#endif

            } while(0);
        default:
            assert(0);
    }
    return 0;
}
/* }}} */
static void xc_entry_add_dmz(xc_entry_t *xce) /* {{{ */
{
    xc_entry_t **head = &(xce->cache->entries[xce->hvalue]);
    xce->next = *head;
    *head = xce;
    xce->cache->entries_count ++;
}
/* }}} */
static xc_entry_t *xc_entry_store_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    xc_entry_t *stored_xce;

    xce->hits  = 0;
    xce->ctime = XG(request_time);
    xce->atime = XG(request_time);
    stored_xce = xc_processor_store_xc_entry_t(xce TSRMLS_CC);
    if (stored_xce) {
        xc_entry_add_dmz(stored_xce);
        return stored_xce;
    }
    else {
        xce->cache->ooms ++;
        return NULL;
    }
}
/* }}} */
static void xc_entry_free_real_dmz(volatile xc_entry_t *xce) /* {{{ */
{
    if (xce->type == XC_TYPE_PHP) {
        xc_php_release_dmz(xce->data.php);
    }
    xce->cache->mem->handlers->free(xce->cache->mem, (xc_entry_t *)xce);
}
/* }}} */
static void xc_entry_free_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    xce->cache->entries_count --;
    if (xce->refcount == 0) {
        xc_entry_free_real_dmz(xce);
    }
    else {
        xce->next = xce->cache->deletes;
        xce->cache->deletes = xce;
        xce->dtime = XG(request_time);
        xce->cache->deletes_count ++;
    }
    return;
}
/* }}} */
static void xc_entry_remove_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    xc_entry_t **pp = &(xce->cache->entries[xce->hvalue]);
    xc_entry_t *p;
    for (p = *pp; p; pp = &(p->next), p = p->next) {
        if (xc_entry_equal_dmz(xce, p)) {
            /* unlink */
            *pp = p->next;
            xc_entry_free_dmz(xce TSRMLS_CC);
            return;
        }
    }
    assert(0);
}
/* }}} */
static xc_entry_t *xc_entry_find_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    xc_entry_t *p;
    for (p = xce->cache->entries[xce->hvalue]; p; p = p->next) {
        if (xc_entry_equal_dmz(xce, p)) {
            if (p->type == XC_TYPE_VAR || /* PHP */ p->mtime == xce->mtime) {
                p->hits ++;
                p->atime = XG(request_time);
                return p;
            }
            else {
                xc_entry_remove_dmz(p TSRMLS_CC);
                return NULL;
            }
        }
    }
    return NULL;
}
/* }}} */
static void xc_entry_hold_php_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    TRACE("hold %s", xce->name.str.val);
    xce->refcount ++;
    xc_stack_push(&XG(php_holds)[xce->cache->cacheid], (void *)xce);
}
/* }}} */
#if 0
static void xc_entry_hold_var_dmz(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    xce->refcount ++;
    xc_stack_push(&XG(var_holds)[xce->cache->cacheid], (void *)xce);
}
/* }}} */
#endif

/* helper function that loop through each entry */
#define XC_ENTRY_APPLY_FUNC(name) int name(xc_entry_t *entry TSRMLS_DC)
typedef XC_ENTRY_APPLY_FUNC((*cache_apply_dmz_func_t));
static void xc_entry_apply_dmz(xc_cache_t *cache, cache_apply_dmz_func_t apply_func TSRMLS_DC) /* {{{ */
{
    xc_entry_t *p, **pp;
    int i, c;

    for (i = 0, c = cache->hentry->size; i < c; i ++) {
        pp = &(cache->entries[i]);
        for (p = *pp; p; p = *pp) {
            if (apply_func(p TSRMLS_CC)) {
                /* unlink */
                *pp = p->next;
                xc_entry_free_dmz(p TSRMLS_CC);
            }
            else {
                pp = &(p->next);
            }
        }
    }
}
/* }}} */

#define XC_CACHE_APPLY_FUNC(name) void name(xc_cache_t *cache TSRMLS_DC)
/* call graph:
 * xc_gc_expires_php -> xc_gc_expires_one -> xc_entry_apply_dmz -> xc_gc_expires_php_entry_dmz
 * xc_gc_expires_var -> xc_gc_expires_one -> xc_entry_apply_dmz -> xc_gc_expires_var_entry_dmz
 */
static XC_ENTRY_APPLY_FUNC(xc_gc_expires_php_entry_dmz) /* {{{ */
{
    TRACE("ttl %lu, %lu %lu", (zend_ulong) XG(request_time), (zend_ulong) entry->atime, xc_php_ttl);
    if (XG(request_time) > entry->atime + xc_php_ttl) {
        return 1;
    }
    return 0;
}
/* }}} */
static XC_ENTRY_APPLY_FUNC(xc_gc_expires_var_entry_dmz) /* {{{ */
{
    if (VAR_ENTRY_EXPIRED(entry)) {
        return 1;
    }
    return 0;
}
/* }}} */
static void xc_gc_expires_one(xc_cache_t *cache, zend_ulong gc_interval, cache_apply_dmz_func_t apply_func TSRMLS_DC) /* {{{ */
{
    TRACE("interval %lu, %lu %lu", (zend_ulong) XG(request_time), (zend_ulong) cache->last_gc_expires, gc_interval);
    if (XG(request_time) - cache->last_gc_expires >= gc_interval) {
        ENTER_LOCK(cache) {
            if (XG(request_time) - cache->last_gc_expires >= gc_interval) {
                cache->last_gc_expires = XG(request_time);
                xc_entry_apply_dmz(cache, apply_func TSRMLS_CC);
            }
        } LEAVE_LOCK(cache);
    }
}
/* }}} */
static void xc_gc_expires_php(TSRMLS_D) /* {{{ */
{
    int i, c;

    if (!xc_php_ttl || !xc_php_gc_interval) {
        return;
    }

    for (i = 0, c = xc_php_hcache.size; i < c; i ++) {
        xc_gc_expires_one(xc_php_caches[i], xc_php_gc_interval, xc_gc_expires_php_entry_dmz TSRMLS_CC);
    }
}
/* }}} */
static void xc_gc_expires_var(TSRMLS_D) /* {{{ */
{
    int i, c;

    if (!xc_var_gc_interval) {
        return;
    }

    for (i = 0, c = xc_var_hcache.size; i < c; i ++) {
        xc_gc_expires_one(xc_var_caches[i], xc_var_gc_interval, xc_gc_expires_var_entry_dmz TSRMLS_CC);
    }
}
/* }}} */

static XC_CACHE_APPLY_FUNC(xc_gc_delete_dmz) /* {{{ */
{
    xc_entry_t *p, **pp;

    pp = &cache->deletes;
    for (p = *pp; p; p = *pp) {
        if (XG(request_time) - p->dtime > 3600) {
            p->refcount = 0;
            /* issue warning here */
        }
        if (p->refcount == 0) {
            /* unlink */
            *pp = p->next;
            cache->deletes_count --;
            xc_entry_free_real_dmz(p);
        }
        else {
            pp = &(p->next);
        }
    }
}
/* }}} */
static XC_CACHE_APPLY_FUNC(xc_gc_deletes_one) /* {{{ */
{
    if (cache->deletes && XG(request_time) - cache->last_gc_deletes > xc_deletes_gc_interval) {
        ENTER_LOCK(cache) {
            if (cache->deletes && XG(request_time) - cache->last_gc_deletes > xc_deletes_gc_interval) {
                cache->last_gc_deletes = XG(request_time);
                xc_gc_delete_dmz(cache TSRMLS_CC);
            }
        } LEAVE_LOCK(cache);
    }
}
/* }}} */
static void xc_gc_deletes(TSRMLS_D) /* {{{ */
{
    int i, c;

    for (i = 0, c = xc_php_hcache.size; i < c; i ++) {
        xc_gc_deletes_one(xc_php_caches[i] TSRMLS_CC);
    }

    for (i = 0, c = xc_var_hcache.size; i < c; i ++) {
        xc_gc_deletes_one(xc_var_caches[i] TSRMLS_CC);
    }
}
/* }}} */

/* helper functions for user functions */
static void xc_fillinfo_dmz(int cachetype, xc_cache_t *cache, zval *return_value TSRMLS_DC) /* {{{ */
{
    zval *blocks;
    const xc_block_t *b;
#ifndef NDEBUG
    xc_memsize_t avail = 0;
#endif
    xc_mem_t *mem = cache->mem;
    const xc_mem_handlers_t *handlers = mem->handlers;
    zend_ulong interval;
    if (cachetype == XC_TYPE_PHP) {
        interval = xc_php_ttl ? xc_php_gc_interval : 0;
    }
    else {
        interval = xc_var_gc_interval;
    }

    add_assoc_long_ex(return_value, ZEND_STRS("slots"),     cache->hentry->size);
    add_assoc_long_ex(return_value, ZEND_STRS("compiling"), cache->compiling);
    add_assoc_long_ex(return_value, ZEND_STRS("misses"),    cache->misses);
    add_assoc_long_ex(return_value, ZEND_STRS("hits"),      cache->hits);
    add_assoc_long_ex(return_value, ZEND_STRS("clogs"),     cache->clogs);
    add_assoc_long_ex(return_value, ZEND_STRS("ooms"),      cache->ooms);

    add_assoc_long_ex(return_value, ZEND_STRS("cached"),    cache->entries_count);
    add_assoc_long_ex(return_value, ZEND_STRS("deleted"),   cache->deletes_count);
    if (interval) {
        time_t gc = (cache->last_gc_expires + interval) - XG(request_time);
        add_assoc_long_ex(return_value, ZEND_STRS("gc"),    gc > 0 ? gc : 0);
    }
    else {
        add_assoc_null_ex(return_value, ZEND_STRS("gc"));
    }

    MAKE_STD_ZVAL(blocks);
    array_init(blocks);

    add_assoc_long_ex(return_value, ZEND_STRS("size"),  handlers->size(mem));
    add_assoc_long_ex(return_value, ZEND_STRS("avail"), handlers->avail(mem));
    add_assoc_bool_ex(return_value, ZEND_STRS("can_readonly"), xc_readonly_protection);

    for (b = handlers->freeblock_first(mem); b; b = handlers->freeblock_next(b)) {
        zval *bi;

        MAKE_STD_ZVAL(bi);
        array_init(bi);

        add_assoc_long_ex(bi, ZEND_STRS("size"),   handlers->block_size(b));
        add_assoc_long_ex(bi, ZEND_STRS("offset"), handlers->block_offset(mem, b));
        add_next_index_zval(blocks, bi);
#ifndef NDEBUG
        avail += handlers->block_size(b);
#endif
    }
    add_assoc_zval_ex(return_value, ZEND_STRS("free_blocks"), blocks);
    assert(avail == handlers->avail(mem));
}
/* }}} */
static void xc_fillentry_dmz(xc_entry_t *entry, int del, zval *list TSRMLS_DC) /* {{{ */
{
    zval* ei;
    xc_entry_data_php_t *php;
    xc_entry_data_var_t *var;

    ALLOC_INIT_ZVAL(ei);
    array_init(ei);

    add_assoc_long_ex(ei, ZEND_STRS("refcount"), entry->refcount);
    add_assoc_long_ex(ei, ZEND_STRS("hits"),     entry->hits);
    add_assoc_long_ex(ei, ZEND_STRS("ctime"),    entry->ctime);
    add_assoc_long_ex(ei, ZEND_STRS("atime"),    entry->atime);
    add_assoc_long_ex(ei, ZEND_STRS("hvalue"),   entry->hvalue);
    if (del) {
        add_assoc_long_ex(ei, ZEND_STRS("dtime"), entry->dtime);
    }
#ifdef IS_UNICODE
    do {
        zval *zv;
        ALLOC_INIT_ZVAL(zv);
        switch (entry->name_type) {
            case IS_UNICODE:
                    ZVAL_UNICODEL(zv, entry->name.ustr.val, entry->name.ustr.len, 1);
                break;
            case IS_STRING:
                ZVAL_STRINGL(zv, entry->name.str.val, entry->name.str.len, 1);
                break;
            default:
                assert(0);
        }
        zv->type = entry->name_type;
        add_assoc_zval_ex(ei, ZEND_STRS("name"), zv);
    } while (0);
#else
    add_assoc_stringl_ex(ei, ZEND_STRS("name"), entry->name.str.val, entry->name.str.len, 1);
#endif
    switch (entry->type) {
        case XC_TYPE_PHP:
            php = entry->data.php;
            add_assoc_long_ex(ei, ZEND_STRS("size"),          entry->size + php->size);
            add_assoc_long_ex(ei, ZEND_STRS("phprefcount"),   php->refcount);
            add_assoc_long_ex(ei, ZEND_STRS("sourcesize"),    php->sourcesize);
#ifdef HAVE_INODE
            add_assoc_long_ex(ei, ZEND_STRS("device"),        entry->device);
            add_assoc_long_ex(ei, ZEND_STRS("inode"),         entry->inode);
#endif
            add_assoc_long_ex(ei, ZEND_STRS("mtime"),         entry->mtime);

#ifdef HAVE_XCACHE_CONSTANT
            add_assoc_long_ex(ei, ZEND_STRS("constinfo_cnt"), php->constinfo_cnt);
#endif
            add_assoc_long_ex(ei, ZEND_STRS("function_cnt"),  php->funcinfo_cnt);
            add_assoc_long_ex(ei, ZEND_STRS("class_cnt"),     php->classinfo_cnt);
#ifdef ZEND_ENGINE_2_1
            add_assoc_long_ex(ei, ZEND_STRS("autoglobal_cnt"),php->autoglobal_cnt);
#endif
            break;

        case XC_TYPE_VAR:
            var = entry->data.var;
            add_assoc_long_ex(ei, ZEND_STRS("size"),          entry->size);
            break;

        default:
            assert(0);
    }

    add_next_index_zval(list, ei);
}
/* }}} */
static void xc_filllist_dmz(xc_cache_t *cache, zval *return_value TSRMLS_DC) /* {{{ */
{
    zval* list;
    int i, c;
    xc_entry_t *e;

    ALLOC_INIT_ZVAL(list);
    array_init(list);

    for (i = 0, c = cache->hentry->size; i < c; i ++) {
        for (e = cache->entries[i]; e; e = e->next) {
            xc_fillentry_dmz(e, 0, list TSRMLS_CC);
        }
    }
    add_assoc_zval(return_value, "cache_list", list);

    ALLOC_INIT_ZVAL(list);
    array_init(list);
    for (e = cache->deletes; e; e = e->next) {
        xc_fillentry_dmz(e, 1, list TSRMLS_CC);
    }
    add_assoc_zval(return_value, "deleted_list", list);
}
/* }}} */

static zend_op_array *xc_entry_install(xc_entry_t *xce, zend_file_handle *h TSRMLS_DC) /* {{{ */
{
    zend_uint i;
    xc_entry_data_php_t *p = xce->data.php;
#ifndef ZEND_ENGINE_2
    /* new ptr which is stored inside CG(class_table) */
    xc_cest_t **new_cest_ptrs = (xc_cest_t **)do_alloca(sizeof(xc_cest_t*) * p->classinfo_cnt);
#endif

    CG(active_op_array) = p->op_array;

#ifdef HAVE_XCACHE_CONSTANT
    /* install constant */
    for (i = 0; i < p->constinfo_cnt; i ++) {
        xc_constinfo_t *ci = &p->constinfos[i];
        xc_install_constant(xce->name.str.val, &ci->constant,
                UNISW(0, ci->type), ci->key, ci->key_size TSRMLS_CC);
    }
#endif

    /* install function */
    for (i = 0; i < p->funcinfo_cnt; i ++) {
        xc_funcinfo_t  *fi = &p->funcinfos[i];
        xc_install_function(xce->name.str.val, &fi->func,
                UNISW(0, fi->type), fi->key, fi->key_size TSRMLS_CC);
    }

    /* install class */
    for (i = 0; i < p->classinfo_cnt; i ++) {
        xc_classinfo_t *ci = &p->classinfos[i];
#ifndef ZEND_ENGINE_2
        zend_class_entry *ce = CestToCePtr(ci->cest);
        /* fix pointer to the be which inside class_table */
        if (ce->parent) {
            zend_uint class_idx = (/* class_num */ (int) (long) ce->parent) - 1;
            assert(class_idx < i);
            ci->cest.parent = new_cest_ptrs[class_idx];
        }
        new_cest_ptrs[i] =
#endif
        xc_install_class(xce->name.str.val, &ci->cest, ci->oplineno,
                UNISW(0, ci->type), ci->key, ci->key_size TSRMLS_CC);
    }

#ifdef ZEND_ENGINE_2_1
    /* trigger auto_globals jit */
    for (i = 0; i < p->autoglobal_cnt; i ++) {
        xc_autoglobal_t *aginfo = &p->autoglobals[i];
        /*
        zend_auto_global *auto_global;
        if (zend_u_hash_find(CG(auto_globals), aginfo->type, aginfo->key, aginfo->key_len+1, (void **) &auto_global)==SUCCESS) {
            if (auto_global->armed) {
                auto_global->armed = auto_global->auto_global_callback(auto_global->name, auto_global->name_len TSRMLS_CC);
            }
        }
        */
        zend_u_is_auto_global(aginfo->type, aginfo->key, aginfo->key_len TSRMLS_CC);
    }
#endif

    i = 1;
    zend_hash_add(&EG(included_files), xce->name.str.val, xce->name.str.len+1, (void *)&i, sizeof(int), NULL);
    if (h) {
        zend_llist_add_element(&CG(open_files), h);
    }

#ifndef ZEND_ENGINE_2
    free_alloca(new_cest_ptrs);
#endif
    return p->op_array;
}
/* }}} */

static inline void xc_entry_unholds_real(xc_stack_t *holds, xc_cache_t **caches, int cachecount TSRMLS_DC) /* {{{ */
{
    int i;
    xc_stack_t *s;
    xc_cache_t *cache;
    xc_entry_t *xce;

    for (i = 0; i < cachecount; i ++) {
        s = &holds[i];
        TRACE("holded %d", xc_stack_count(s));
        if (xc_stack_count(s)) {
            cache = ((xc_entry_t *)xc_stack_top(s))->cache;
            ENTER_LOCK(cache) {
                while (xc_stack_count(s)) {
                    xce = (xc_entry_t*) xc_stack_pop(s);
                    TRACE("unhold %s", xce->name.str.val);
                    xce->refcount --;
                    assert(xce->refcount >= 0);
                }
            } LEAVE_LOCK(cache);
        }
    }
}
/* }}} */
static void xc_entry_unholds(TSRMLS_D) /* {{{ */
{
    xc_entry_unholds_real(XG(php_holds), xc_php_caches, xc_php_hcache.size TSRMLS_CC);
    xc_entry_unholds_real(XG(var_holds), xc_var_caches, xc_var_hcache.size TSRMLS_CC);
}
/* }}} */
static int xc_stat(const char *filename, const char *include_path, struct stat *pbuf TSRMLS_DC) /* {{{ */
{
    char filepath[MAXPATHLEN];
    char *paths, *path;
    char *tokbuf;
    int size = strlen(include_path) + 1;
    char tokens[] = { DEFAULT_DIR_SEPARATOR, '\0' };

    paths = (char *)do_alloca(size);
    memcpy(paths, include_path, size);

    for (path = php_strtok_r(paths, tokens, &tokbuf); path; path = php_strtok_r(NULL, tokens, &tokbuf)) {
        if (snprintf(filepath, sizeof(filepath), "%s/%s", path, filename) >= MAXPATHLEN - 1) {
            continue;
        }
        if (VCWD_STAT(filepath, pbuf) == 0) {
            free_alloca(paths);
            return SUCCESS;
        }
    }

    free_alloca(paths);

    return FAILURE;
}
/* }}} */

#define HASH(i) (i)
#define HASH_USTR_L(t, s, l) HASH(zend_u_inline_hash_func(t, s, (l + 1) * sizeof(UChar)))
#define HASH_STR_S(s, l) HASH(zend_inline_hash_func(s, l))
#define HASH_STR_L(s, l) HASH_STR_S(s, l + 1)
#define HASH_STR(s) HASH_STR_L(s, strlen(s) + 1)
#define HASH_NUM(n) HASH(n)
static inline xc_hash_value_t xc_hash_fold(xc_hash_value_t hvalue, const xc_hash_t *hasher) /* {{{ fold hash bits as needed */
{
    xc_hash_value_t folded = 0;
    while (hvalue) {
        folded ^= (hvalue & hasher->mask);
        hvalue >>= hasher->bits;
    }
    return folded;
}
/* }}} */
static inline xc_hash_value_t xc_entry_hash_name(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    return UNISW(NOTHING, UG(unicode) ? HASH_USTR_L(xce->name_type, xce->name.uni.val, xce->name.uni.len) :)
        HASH_STR_L(xce->name.str.val, xce->name.str.len);
}
/* }}} */
#define xc_entry_hash_var xc_entry_hash_name
static inline xc_hash_value_t xc_entry_hash_php(xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
#ifdef HAVE_INODE
    if (xce->inode) {
        return HASH(xce->device + xce->inode);
    }
#endif
    return xc_entry_hash_name(xce TSRMLS_CC);
}
/* }}} */
static int xc_entry_init_key_php(xc_entry_t *xce, char *filename, char *opened_path_buffer TSRMLS_DC) /* {{{ */
{
    struct stat buf, *pbuf;
    xc_hash_value_t hv;
    int cacheid;
    xc_entry_data_php_t *php;
    char *ptr;

    if (!filename || !SG(request_info).path_translated) {
        return FAILURE;
    }

    if (strstr(filename, "://") != NULL) {
        return FAILURE;
    }

    php = xce->data.php;

    if (XG(stat)) {
        if (strcmp(SG(request_info).path_translated, filename) == 0) {
            /* sapi has already done this stat() for us */
            pbuf = sapi_get_stat(TSRMLS_C);
            if (pbuf) {
                goto stat_done;
            }
        }

        /* absolute path */
        pbuf = &buf;
        if (IS_ABSOLUTE_PATH(filename, strlen(filename))) {
            if (VCWD_STAT(filename, pbuf) != 0) {
                return FAILURE;
            }
            goto stat_done;
        }

        /* relative path */
        if (*filename == '.' && (IS_SLASH(filename[1]) || filename[1] == '.')) {
            ptr = filename + 1;
            if (*ptr == '.') {
                while (*(++ptr) == '.');
                if (!IS_SLASH(*ptr)) {
                    goto not_relative_path;
                }   
            }

            if (VCWD_STAT(filename, pbuf) != 0) {
                return FAILURE;
            }
            goto stat_done;
        }
not_relative_path:

        /* use include_path */
        if (xc_stat(filename, PG(include_path), pbuf TSRMLS_CC) != SUCCESS) {
            return FAILURE;
        }

        /* fall */

stat_done:
        if (XG(request_time) - pbuf->st_mtime < 2 && !xc_test) {
            return FAILURE;
        }

        xce->mtime        = pbuf->st_mtime;
#ifdef HAVE_INODE
        xce->device       = pbuf->st_dev;
        xce->inode        = pbuf->st_ino;
#endif
        php->sourcesize   = pbuf->st_size;
    }
    else { /* XG(inode) */
        xce->mtime        = 0;
#ifdef HAVE_INODE
        xce->device       = 0;
        xce->inode        = 0;
#endif
        php->sourcesize   = 0;
    }

#ifdef HAVE_INODE
    if (!xce->inode)
#endif
    {
        /* hash on filename, let's expand it to real path */
        filename = expand_filepath(filename, opened_path_buffer TSRMLS_CC);
        if (filename == NULL) {
            return FAILURE;
        }
    }

    UNISW(NOTHING, xce->name_type = IS_STRING;)
    xce->name.str.val = filename;
    xce->name.str.len = strlen(filename);

    hv = xc_entry_hash_php(xce TSRMLS_CC);
    cacheid = xc_hash_fold(hv, &xc_php_hcache);
    xce->cache = xc_php_caches[cacheid];
    xce->hvalue = xc_hash_fold(hv, &xc_php_hentry);

    xce->type = XC_TYPE_PHP;
    return SUCCESS;
}
/* }}} */
static inline xc_hash_value_t xc_php_hash_md5(xc_entry_data_php_t *php TSRMLS_DC) /* {{{ */
{
    return HASH_STR_S(php->md5, sizeof(php->md5));
}
/* }}} */
static int xc_entry_init_key_php_md5(xc_entry_data_php_t *php, xc_entry_t *xce TSRMLS_DC) /* {{{ */
{
    unsigned char   buf[1024];
    PHP_MD5_CTX     context;
    int             n;
    php_stream     *stream;
    xc_hash_value_t hv;

    stream = php_stream_open_wrapper(xce->name.str.val, "rb", USE_PATH | REPORT_ERRORS | ENFORCE_SAFE_MODE | STREAM_DISABLE_OPEN_BASEDIR, NULL);
    if (!stream) {
        return FAILURE;
    }

    PHP_MD5Init(&context);
    while ((n = php_stream_read(stream, (char *) buf, sizeof(buf))) > 0) {
        PHP_MD5Update(&context, buf, n);
    }
    PHP_MD5Final((unsigned char *) php->md5, &context);

    php_stream_close(stream);

    if (n < 0) {
        return FAILURE;
    }

    hv = xc_php_hash_md5(php TSRMLS_CC);
    php->cache  = xce->cache;
    php->hvalue = (hv & php->cache->hphp->mask);
#ifdef DEBUG
    {
        char md5str[33];
        make_digest(md5str, (unsigned char *) php->md5);
        TRACE("md5 %s", md5str);
    }
#endif

    return SUCCESS;
}
/* }}} */
static void xc_cache_early_binding_class_cb(zend_op *opline, int oplineno, void *data TSRMLS_DC) /* {{{ */
{
    char *class_name;
    int i, class_len;
    xc_cest_t cest;
    xc_entry_data_php_t *php = (xc_entry_data_php_t *) data;

    class_name = opline->op1.u.constant.value.str.val;
    class_len  = opline->op1.u.constant.value.str.len;
    if (zend_hash_find(CG(class_table), class_name, class_len, (void **) &cest) == FAILURE) {
        assert(0);
    }
    TRACE("got ZEND_DECLARE_INHERITED_CLASS: %s", class_name + 1);
    /* let's see which class */
    for (i = 0; i < php->classinfo_cnt; i ++) {
        if (memcmp(ZSTR_S(php->classinfos[i].key), class_name, class_len) == 0) {
            php->classinfos[i].oplineno = oplineno;
            php->have_early_binding = 1;
            break;
        }
    }

    if (i == php->classinfo_cnt) {
        assert(0);
    }
}
/* }}} */
static void xc_free_php(xc_entry_data_php_t *php TSRMLS_DC) /* {{{ */
{
#define X_FREE(var) do {\
    if (php->var) { \
        efree(php->var); \
    } \
} while (0)

#ifdef ZEND_ENGINE_2_1
    X_FREE(autoglobals);
#endif
    X_FREE(classinfos);
    X_FREE(funcinfos);
#ifdef HAVE_XCACHE_CONSTANT
    X_FREE(constinfos);
#endif
#undef X_FREE
}
/* }}} */
static zend_op_array *xc_compile_php(xc_entry_data_php_t *php, zend_file_handle *h, int type TSRMLS_DC) /* {{{ */
{
    zend_op_array *op_array;
    int old_constinfo_cnt, old_funcinfo_cnt, old_classinfo_cnt;
    int i;
    zend_bool catched = 0;

    /* {{{ compile */
    TRACE("compiling %s", h->opened_path ? h->opened_path : h->filename);

    old_classinfo_cnt = zend_hash_num_elements(CG(class_table));
    old_funcinfo_cnt  = zend_hash_num_elements(CG(function_table));
    old_constinfo_cnt = zend_hash_num_elements(EG(zend_constants));

    php->op_array = NULL;
    XG(initial_compile_file_called) = 0;
    zend_try {
        op_array = old_compile_file(h, type TSRMLS_CC);
    } zend_catch {
        catched = 1;
    } zend_end_try();

    if (catched) {
        goto err_bailout;
    }

    if (op_array == NULL) {
        goto err_op_array;
    }

    if (!XG(initial_compile_file_called)) {
        return op_array;
    }

#ifdef HAVE_XCACHE_OPTIMIZER
    if (XG(optimizer)) {
        xc_optimize(op_array TSRMLS_CC);
    }
#endif
    /* }}} */
    /* {{{ prepare */
    php->op_array      = op_array;

#ifdef HAVE_XCACHE_CONSTANT
    php->constinfo_cnt  = zend_hash_num_elements(EG(zend_constants)) - old_constinfo_cnt;
#endif
    php->funcinfo_cnt   = zend_hash_num_elements(CG(function_table)) - old_funcinfo_cnt;
    php->classinfo_cnt  = zend_hash_num_elements(CG(class_table))    - old_classinfo_cnt;
#ifdef ZEND_ENGINE_2_1
    /* {{{ count php->autoglobal_cnt */ {
        Bucket *b;

        php->autoglobal_cnt = 0;
        for (b = CG(auto_globals)->pListHead; b != NULL; b = b->pListNext) {
            zend_auto_global *auto_global = (zend_auto_global *) b->pData;
            /* check if actived */
            if (auto_global->auto_global_callback && !auto_global->armed) {
                php->autoglobal_cnt ++;
            }
        }
    }
    /* }}} */
#endif

#define X_ALLOC_N(var, cnt) do {     \
    if (php->cnt) {                  \
        ECALLOC_N(php->var, php->cnt); \
        if (!php->var) {             \
            goto err_alloc;          \
        }                            \
    }                                \
    else {                           \
        php->var = NULL;             \
    }                                \
} while (0)

#ifdef HAVE_XCACHE_CONSTANT
    X_ALLOC_N(constinfos,  constinfo_cnt);
#endif
    X_ALLOC_N(funcinfos,   funcinfo_cnt);
    X_ALLOC_N(classinfos,  classinfo_cnt);
#ifdef ZEND_ENGINE_2_1
    X_ALLOC_N(autoglobals, autoglobal_cnt);
#endif
#undef X_ALLOC
    /* }}} */
    /* {{{ shallow copy, pointers only */ {
        Bucket *b;
        unsigned int i;
        unsigned int j;

#define COPY_H(vartype, var, cnt, name, datatype) do {        \
    for (i = 0, j = 0; b; i ++, b = b->pListNext) {           \
        vartype *data = &php->var[j];                         \
                                                              \
        if (i < old_##cnt) {                                  \
            continue;                                         \
        }                                                     \
        j ++;                                                 \
                                                              \
        assert(i < old_##cnt + php->cnt);                     \
        assert(b->pData);                                     \
        memcpy(&data->name, b->pData, sizeof(datatype));      \
        UNISW(NOTHING, data->type = b->key.type;)             \
        if (UNISW(1, b->key.type == IS_STRING)) {             \
            ZSTR_S(data->key)      = BUCKET_KEY_S(b);         \
        }                                                     \
        else {                                                \
            ZSTR_U(data->key)      = BUCKET_KEY_U(b);         \
        }                                                     \
        data->key_size   = b->nKeyLength;                     \
    }                                                         \
} while(0)

#ifdef HAVE_XCACHE_CONSTANT
        b = EG(zend_constants)->pListHead; COPY_H(xc_constinfo_t, constinfos, constinfo_cnt, constant, zend_constant);
#endif
        b = CG(function_table)->pListHead; COPY_H(xc_funcinfo_t,  funcinfos,  funcinfo_cnt,  func,     zend_function);
        b = CG(class_table)->pListHead;    COPY_H(xc_classinfo_t, classinfos, classinfo_cnt, cest,     xc_cest_t);

#undef COPY_H

        /* for ZE1, cest need to be fixed inside store */

#ifdef ZEND_ENGINE_2_1
        /* scan for acatived auto globals */
        i = 0;
        for (b = CG(auto_globals)->pListHead; b != NULL; b = b->pListNext) {
            zend_auto_global *auto_global = (zend_auto_global *) b->pData;
            /* check if actived */
            if (auto_global->auto_global_callback && !auto_global->armed) {
                xc_autoglobal_t *data = &php->autoglobals[i];

                assert(i < php->autoglobal_cnt);
                i ++;
                UNISW(NOTHING, data->type = b->key.type;)
                if (UNISW(1, b->key.type == IS_STRING)) {
                    ZSTR_S(data->key)     = BUCKET_KEY_S(b);
                }
                else {
                    ZSTR_U(data->key)     = BUCKET_KEY_U(b);
                }
                data->key_len = b->nKeyLength - 1;
            }
        }
#endif
    }
    /* }}} */
    /* {{{ find inherited classes that should be early-binding */
    php->have_early_binding = 0;
    for (i = 0; i < php->classinfo_cnt; i ++) {
        php->classinfos[i].oplineno = -1;
    }

    xc_undo_pass_two(php->op_array TSRMLS_CC);
    xc_foreach_early_binding_class(php->op_array, xc_cache_early_binding_class_cb, (void *) php TSRMLS_CC);
    xc_redo_pass_two(php->op_array TSRMLS_CC);
    /* }}} */

    return op_array;

err_alloc:
    xc_free_php(php TSRMLS_CC);

err_bailout:
err_op_array:

    if (catched) {
        zend_bailout();
    }

    return op_array;
}
/* }}} */
static zend_op_array *xc_compile_restore(xc_entry_t *stored_xce, zend_file_handle *h TSRMLS_DC) /* {{{ */
{
    zend_op_array *op_array;
    xc_entry_t xce;
    xc_entry_data_php_t php;
    zend_bool catched;

    CG(in_compilation)    = 1;
    CG(compiled_filename) = stored_xce->name.str.val;
    CG(zend_lineno)       = 0;
    TRACE("restoring %s", stored_xce->name.str.val);
    xc_processor_restore_xc_entry_t(&xce, stored_xce TSRMLS_CC);
    xc_processor_restore_xc_entry_data_php_t(&php, xce.data.php, xc_readonly_protection TSRMLS_CC);
    xce.data.php = &php;
#ifdef SHOW_DPRINT
    xc_dprint(&xce, 0 TSRMLS_CC);
#endif

    catched = 0;
    zend_try {
        op_array = xc_entry_install(&xce, h TSRMLS_CC);
    } zend_catch {
        catched = 1;
    } zend_end_try();

    xc_free_php(&php TSRMLS_CC);

    if (catched) {
        zend_bailout();
    }
    CG(in_compilation)    = 0;
    CG(compiled_filename) = NULL;
    TRACE("restored  %s", stored_xce->name.str.val);
    return op_array;
}
/* }}} */
static zend_op_array *xc_check_initial_compile_file(zend_file_handle *h, int type TSRMLS_DC) /* {{{ */
{
    XG(initial_compile_file_called) = 1;
    return origin_compile_file(h, type TSRMLS_CC);
}
/* }}} */
static zend_op_array *xc_compile_file(zend_file_handle *h, int type TSRMLS_DC) /* {{{ */
{
    zend_op_array *op_array;
    xc_entry_t xce, *stored_xce;
    xc_entry_data_php_t php, *stored_php;
    xc_cache_t *cache;
    zend_bool gaveup = 0;
    zend_bool catched = 0;
    zend_bool newlycompiled;
    char *filename;
    char opened_path_buffer[MAXPATHLEN];
    xc_sandbox_t sandbox;

    assert(xc_initized);

    TRACE("type = %d\n", h->type);
    if (!XG(cacher)) {
        op_array = old_compile_file(h, type TSRMLS_CC);
#ifdef HAVE_XCACHE_OPTIMIZER
        if (XG(optimizer)) {
            xc_optimize(op_array TSRMLS_CC);
        }
#endif
        return op_array;
    }

    /* {{{ entry_init_key */
    filename = h->opened_path ? h->opened_path : h->filename;
    xce.data.php = &php;
    if (xc_entry_init_key_php(&xce, filename, opened_path_buffer TSRMLS_CC) != SUCCESS) {
        TRACE("failed to init key for %s", filename);
        return old_compile_file(h, type TSRMLS_CC);
    }
    cache = xce.cache;
    /* }}} */

    /* stale clogs precheck */
    if (cache->compiling) {
        cache->clogs ++;
        return old_compile_file(h, type TSRMLS_CC);
    }
    /* {{{ entry_lookup/hit/md5_init/php_lookup */
    stored_xce = NULL;
    stored_php = NULL;
    ENTER_LOCK_EX(cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            cache->hits ++;

            TRACE("hit %s, holding", stored_xce->name.str.val);
            xc_entry_hold_php_dmz(stored_xce TSRMLS_CC);
        }
        else {
            cache->misses ++;
            TRACE("miss %s", xce.name.str.val);

            if (xc_entry_init_key_php_md5(&php, &xce TSRMLS_CC) != SUCCESS) {
                gaveup = 1;
                break;
            }

            stored_php = xc_php_find_dmz(&php TSRMLS_CC);

            /* miss but compiling */
            if (!stored_php) {
                if (cache->compiling) {
                    TRACE("%s", "miss but compiling");
                    cache->clogs ++;
                    gaveup = 1;
                    break;
                }
                TRACE("%s", "php_lookup miss");
            }
            else {
                TRACE("%s", "php_lookup hit");
            }

            cache->compiling = XG(request_time);
        }
    } LEAVE_LOCK_EX(cache);

    if (catched) {
        cache->compiling = 0;
        zend_bailout();
    }

    /* hit */
    if (stored_xce) {
        return xc_compile_restore(stored_xce, h TSRMLS_CC);
    }

    /* gaveup */
    if (gaveup) {
        return old_compile_file(h, type TSRMLS_CC);
    }
    /* }}} */
    op_array = NULL;
    /* {{{ compile */
    if (stored_php) {
        newlycompiled = 0;
        xce.data.php = stored_php;
    }
    else {
        newlycompiled = 1;

        /* make compile inside sandbox */
        xc_sandbox_init(&sandbox, filename TSRMLS_CC);

#ifdef HAVE_XCACHE_CONSTANT
        php.constinfos  = NULL;
#endif
        php.funcinfos   = NULL;
        php.classinfos  = NULL;
#ifdef ZEND_ENGINE_2_1
        php.autoglobals = NULL;
#endif
        zend_try {
            op_array = xc_compile_php(&php, h, type TSRMLS_CC);
        } zend_catch {
            catched = 1;
        } zend_end_try();

        if (catched || !op_array) {
            goto err_aftersandbox;
        }

        /* not cachable */
        if (!php.op_array) {
            cache->compiling = 0;
            xc_sandbox_free(&sandbox, XC_InstallNoBinding TSRMLS_CC);
            return op_array;
        }

        xce.data.php = &php;
    }
    /* }}} */
#ifdef HAVE_INODE
    /* {{{ path name fix
     * inode enabled entry hash/compare on name
     * do not update to its name to real pathname
     * WARNING: this code is required to be after compile
     */
    if (xce.inode) {
        filename = h->opened_path ? h->opened_path : h->filename;
        if (xce.name.str.val != filename) {
            xce.name.str.val = filename;
            xce.name.str.len = strlen(filename);
        }
    }
    /* }}} */
#endif
#ifdef SHOW_DPRINT
    xc_dprint(&xce, 0 TSRMLS_CC);
#endif
    stored_xce = NULL;
    ENTER_LOCK_EX(cache) { /* {{{ php_store/entry_store */
        /* php_store */
        if (newlycompiled) {
            stored_php = xc_php_store_dmz(&php TSRMLS_CC);
            if (!stored_php) {
                /* error */
                break;
            }
        }
        /* entry_store */
        xc_php_addref_dmz(stored_php);
        stored_xce = xc_entry_store_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            stored_xce->data.php = stored_php;
        }
        else {
            /* error */
            xc_php_release_dmz(stored_php);
        }
    } LEAVE_LOCK_EX(cache);
    /* }}} */
    TRACE("%s", stored_xce ? "stored" : "store failed");

    cache->compiling = 0;
    if (catched) {
        goto err_aftersandbox;
    }

    if (newlycompiled) {
        xc_free_php(&php TSRMLS_CC);
    }

    if (stored_xce) {
        if (op_array) {
#ifdef ZEND_ENGINE_2
            destroy_op_array(op_array TSRMLS_CC);
#else
            destroy_op_array(op_array);
#endif
            efree(op_array);
            h = NULL;
        }
        if (newlycompiled) {
            xc_sandbox_free(&sandbox, XC_NoInstall TSRMLS_CC);
        }
        return xc_compile_restore(stored_xce, h TSRMLS_CC);
    }
    else {
        if (newlycompiled) {
            /* install it */
            CG(active_op_array) = op_array;
            xc_sandbox_free(&sandbox, XC_Install TSRMLS_CC);
        }
    }
    return op_array;

err_aftersandbox:
    if (newlycompiled) {
        xc_free_php(&php TSRMLS_CC);
        xc_sandbox_free(&sandbox, XC_NoInstall TSRMLS_CC);
    }

    if (catched) {
        cache->compiling = 0;
        zend_bailout();
    }
    return op_array;
}
/* }}} */

/* gdb helper functions, but N/A for coredump */
int xc_is_rw(const void *p) /* {{{ */
{
    xc_shm_t *shm;
    int i;
    if (!xc_initized) {
        return 0;
    }
    for (i = 0; i < xc_php_hcache.size; i ++) {
        shm = xc_php_caches[i]->shm;
        if (shm->handlers->is_readwrite(shm, p)) {
            return 1;
        }
    }
    for (i = 0; i < xc_var_hcache.size; i ++) {
        shm = xc_var_caches[i]->shm;
        if (shm->handlers->is_readwrite(shm, p)) {
            return 1;
        }
    }
    return 0;
}
/* }}} */
int xc_is_ro(const void *p) /* {{{ */
{
    xc_shm_t *shm;
    int i;
    if (!xc_initized) {
        return 0;
    }
    for (i = 0; i < xc_php_hcache.size; i ++) {
        shm = xc_php_caches[i]->shm;
        if (shm->handlers->is_readonly(shm, p)) {
            return 1;
        }
    }
    for (i = 0; i < xc_var_hcache.size; i ++) {
        shm = xc_var_caches[i]->shm;
        if (shm->handlers->is_readonly(shm, p)) {
            return 1;
        }
    }
    return 0;
}
/* }}} */
int xc_is_shm(const void *p) /* {{{ */
{
    return xc_is_ro(p) || xc_is_rw(p);
}
/* }}} */

/* module helper function */
static int xc_init_constant(int module_number TSRMLS_DC) /* {{{ */
{
    typedef struct {
        const char *prefix;
        zend_uchar (*getsize)();
        const char *(*get)(zend_uchar i);
    } xc_meminfo_t;
    xc_meminfo_t nameinfos[] = {
        { "",        xc_get_op_type_count,   xc_get_op_type   },
        { "",        xc_get_data_type_count, xc_get_data_type },
        { "",        xc_get_opcode_count,    xc_get_opcode    },
        { "OPSPEC_", xc_get_op_spec_count,   xc_get_op_spec   },
        { NULL, NULL, NULL }
    };
    xc_meminfo_t* p;
    zend_uchar i, count;
    char const_name[96];
    int const_name_len;
    int undefdone = 0;

    for (p = nameinfos; p->getsize; p ++) {
        count = p->getsize();
        for (i = 0; i < count; i ++) {
            const char *name = p->get(i);
            if (!name) continue;
            if (strcmp(name, "UNDEF") == 0) {
                if (undefdone) continue;
                undefdone = 1;
            }
            const_name_len = snprintf(const_name, sizeof(const_name), "XC_%s%s", p->prefix, name);
            zend_register_long_constant(const_name, const_name_len+1, i, CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
        }
    }

    zend_register_long_constant(ZEND_STRS("XC_SIZEOF_TEMP_VARIABLE"), sizeof(temp_variable), CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
    zend_register_long_constant(ZEND_STRS("XC_TYPE_PHP"), XC_TYPE_PHP, CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
    zend_register_long_constant(ZEND_STRS("XC_TYPE_VAR"), XC_TYPE_VAR, CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
    zend_register_stringl_constant(ZEND_STRS("XCACHE_VERSION"), ZEND_STRL(XCACHE_VERSION), CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
    zend_register_stringl_constant(ZEND_STRS("XCACHE_MODULES"), ZEND_STRL(XCACHE_MODULES), CONST_CS | CONST_PERSISTENT, module_number TSRMLS_CC);
    return 0;
}
/* }}} */
static xc_shm_t *xc_cache_destroy(xc_cache_t **caches, xc_hash_t *hcache) /* {{{ */
{
    int i;
    xc_cache_t *cache;
    xc_shm_t *shm;

    if (!caches) {
        return NULL;
    }
    shm = NULL;
    for (i = 0; i < hcache->size; i ++) {
        cache = caches[i];
        if (cache) {
            if (cache->lck) {
                xc_lock_destroy(cache->lck);
            }
            /* do NOT free
            if (cache->entries) {
                cache->mem->handlers->free(cache->mem, cache->entries);
            }
            cache->mem->handlers->free(cache->mem, cache);
            */
            shm = cache->shm;
            shm->handlers->memdestroy(cache->mem);
        }
    }
    free(caches);
    return shm;
}
/* }}} */
static xc_cache_t **xc_cache_init(xc_shm_t *shm, xc_hash_t *hcache, xc_hash_t *hentry, xc_hash_t *hphp, xc_shmsize_t shmsize) /* {{{ */
{
    xc_cache_t **caches = NULL, *cache;
    xc_mem_t *mem;
    time_t now = time(NULL);
    int i;
    xc_memsize_t memsize;

    memsize = shmsize / hcache->size;

    /* Don't let it break out of mem after ALIGNed
     * This is important for 
     * Simply loop until it fit our need
     */
    while (ALIGN(memsize) * hcache->size > shmsize && ALIGN(memsize) != memsize) {
        if (memsize < ALIGN(1)) {
            CHECK(NULL, "cache too small");
        }
        memsize --;
    }

    CHECK(caches = calloc(hcache->size, sizeof(xc_cache_t *)), "caches OOM");

    for (i = 0; i < hcache->size; i ++) {
        CHECK(mem            = shm->handlers->meminit(shm, memsize), "Failed init memory allocator");
        CHECK(cache          = mem->handlers->calloc(mem, 1, sizeof(xc_cache_t)), "cache OOM");
        CHECK(cache->entries = mem->handlers->calloc(mem, hentry->size, sizeof(xc_entry_t*)), "entries OOM");
        if (hphp) {
            CHECK(cache->phps= mem->handlers->calloc(mem, hphp->size, sizeof(xc_entry_data_php_t*)), "phps OOM");
        }
        CHECK(cache->lck     = xc_lock_init(NULL), "can't create lock");

        cache->hcache  = hcache;
        cache->hentry  = hentry;
        cache->hphp    = hphp;
        cache->shm     = shm;
        cache->mem     = mem;
        cache->cacheid = i;
        cache->last_gc_deletes = now;
        cache->last_gc_expires = now;
        caches[i] = cache;
    }
    return caches;

err:
    if (caches) {
        xc_cache_destroy(caches, hcache);
    }
    return NULL;
}
/* }}} */
static void xc_destroy() /* {{{ */
{
    xc_shm_t *shm = NULL;

    if (old_compile_file) {
        zend_compile_file = old_compile_file;
        old_compile_file = NULL;
    }

    if (origin_compile_file) {
        zend_compile_file = origin_compile_file;
        origin_compile_file = NULL;
    }

    if (xc_php_caches) {
        shm = xc_cache_destroy(xc_php_caches, &xc_php_hcache);
        xc_php_caches = NULL;
    }
    xc_php_hcache.size = 0;

    if (xc_var_caches) {
        shm = xc_cache_destroy(xc_var_caches, &xc_var_hcache);
        xc_var_caches = NULL;
    }
    xc_var_hcache.size = 0;

    if (shm) {
        xc_shm_destroy(shm);
    }

    xc_initized = 0;
}
/* }}} */
static int xc_init(int module_number TSRMLS_DC) /* {{{ */
{
    xc_shm_t *shm;
    xc_shmsize_t shmsize = ALIGN(xc_php_size) + ALIGN(xc_var_size);

    xc_php_caches = xc_var_caches = NULL;
    shm = NULL;

    if (shmsize < (size_t) xc_php_size || shmsize < (size_t) xc_var_size) {
        zend_error(E_ERROR, "XCache: neither xcache.size nor xcache.var_size can be negative");
        goto err;
    }

    if (xc_php_size || xc_var_size) {
        CHECK(shm = xc_shm_init(xc_shm_scheme, shmsize, xc_readonly_protection, xc_mmap_path, NULL), "Cannot create shm");
        if (!shm->handlers->can_readonly(shm)) {
            xc_readonly_protection = 0;
        }

        if (xc_php_size) {
            old_compile_file = zend_compile_file;
            zend_compile_file = xc_compile_file;

            CHECK(xc_php_caches = xc_cache_init(shm, &xc_php_hcache, &xc_php_hentry, &xc_php_hentry, xc_php_size), "failed init opcode cache");
        }

        if (xc_var_size) {
            CHECK(xc_var_caches = xc_cache_init(shm, &xc_var_hcache, &xc_var_hentry, NULL, xc_var_size), "failed init variable cache");
        }
    }
    return SUCCESS;

err:
    xc_destroy();
    if (xc_php_caches || xc_var_caches) {
        /* shm destroied in xc_destroy() */
    }
    else if (shm) {
        xc_shm_destroy(shm);
    }
    return 0;
}
/* }}} */
static void xc_request_init(TSRMLS_D) /* {{{ */
{
    int i;

    if (XG(internal_function_table).nTableSize == 0) {
        zend_function tmp_func;
        xc_cest_t tmp_cest;

        zend_hash_init_ex(&XG(internal_function_table), 100, NULL, CG(function_table)->pDestructor, 1, 0);
        zend_hash_copy(&XG(internal_function_table), CG(function_table), (copy_ctor_func_t) function_add_ref, &tmp_func, sizeof(tmp_func));

        zend_hash_init_ex(&XG(internal_class_table), 10, NULL, CG(class_table)->pDestructor, 1, 0);
        zend_hash_copy(&XG(internal_class_table), CG(class_table), (copy_ctor_func_t) xc_zend_class_add_ref, &tmp_cest, sizeof(tmp_cest));
    }
    if (xc_php_hcache.size && !XG(php_holds)) {
        XG(php_holds) = calloc(xc_php_hcache.size, sizeof(xc_stack_t));
        for (i = 0; i < xc_php_hcache.size; i ++) {
            xc_stack_init(&XG(php_holds[i]));
        }
    }

    if (xc_var_hcache.size && !XG(var_holds)) {
        XG(var_holds) = calloc(xc_var_hcache.size, sizeof(xc_stack_t));
        for (i = 0; i < xc_var_hcache.size; i ++) {
            xc_stack_init(&XG(var_holds[i]));
        }
    }

#if PHP_API_VERSION <= 20041225
    XG(request_time) = time(NULL);
#else
    XG(request_time) = sapi_get_request_time(TSRMLS_C);
#endif

#ifdef HAVE_XCACHE_COVERAGER
    xc_coverager_request_init(TSRMLS_C);
#endif
}
/* }}} */
static void xc_request_shutdown(TSRMLS_D) /* {{{ */
{
    xc_entry_unholds(TSRMLS_C);
    xc_gc_expires_php(TSRMLS_C);
    xc_gc_expires_var(TSRMLS_C);
    xc_gc_deletes(TSRMLS_C);
#ifdef HAVE_XCACHE_COVERAGER
    xc_coverager_request_shutdown(TSRMLS_C);
#endif
}
/* }}} */
/* {{{ PHP_GINIT_FUNCTION(xcache) */
static
#ifdef PHP_GINIT_FUNCTION
PHP_GINIT_FUNCTION(xcache)
#else
void xc_init_globals(zend_xcache_globals* xcache_globals TSRMLS_DC)
#endif
{
    memset(xcache_globals, 0, sizeof(zend_xcache_globals));
}
/* }}} */
/* {{{ PHP_GSHUTDOWN_FUNCTION(xcache) */
static
#ifdef PHP_GSHUTDOWN_FUNCTION
PHP_GSHUTDOWN_FUNCTION(xcache)
#else
void xc_shutdown_globals(zend_xcache_globals* xcache_globals TSRMLS_DC)
#endif
{
    int i;

    if (xcache_globals->php_holds != NULL) {
        for (i = 0; i < xc_php_hcache.size; i ++) {
            xc_stack_destroy(&xcache_globals->php_holds[i]);
        }
        free(xcache_globals->php_holds);
        xcache_globals->php_holds = NULL;
    }

    if (xcache_globals->var_holds != NULL) {
        for (i = 0; i < xc_var_hcache.size; i ++) {
            xc_stack_destroy(&xcache_globals->var_holds[i]);
        }
        free(xcache_globals->var_holds);
        xcache_globals->var_holds = NULL;
    }

    zend_hash_destroy(&xcache_globals->internal_function_table);
    zend_hash_destroy(&xcache_globals->internal_class_table);
}
/* }}} */

/* user functions */
static int xcache_admin_auth_check(TSRMLS_D) /* {{{ */
{
    zval **server = NULL;
    zval **user = NULL;
    zval **pass = NULL;
    char *admin_user = NULL;
    char *admin_pass = NULL;
    HashTable *ht;

    if (cfg_get_string("xcache.admin.user", &admin_user) == FAILURE || !admin_user[0]) {
        admin_user = NULL;
    }
    if (cfg_get_string("xcache.admin.pass", &admin_pass) == FAILURE || !admin_pass[0]) {
        admin_pass = NULL;
    }

    if (admin_user == NULL || admin_pass == NULL) {
        php_error_docref(NULL TSRMLS_CC, E_ERROR, "xcache.admin.user and xcache.admin.pass is required");
        zend_bailout();
    }
    if (strlen(admin_pass) != 32) {
        php_error_docref(NULL TSRMLS_CC, E_ERROR, "unexpect %lu bytes of xcache.admin.pass, expected 32 bytes, the password after md5()", (unsigned long) strlen(admin_pass));
        zend_bailout();
    }

#ifdef ZEND_ENGINE_2_1
    zend_is_auto_global("_SERVER", sizeof("_SERVER") - 1 TSRMLS_CC);
#endif
    if (zend_hash_find(&EG(symbol_table), "_SERVER", sizeof("_SERVER"), (void **) &server) != SUCCESS || Z_TYPE_PP(server) != IS_ARRAY) {
        php_error_docref(NULL TSRMLS_CC, E_ERROR, "_SERVER is corrupted");
        zend_bailout();
    }
    ht = HASH_OF((*server));

    if (zend_hash_find(ht, "PHP_AUTH_USER", sizeof("PHP_AUTH_USER"), (void **) &user) == FAILURE) {
        user = NULL;
    }
    else if (Z_TYPE_PP(user) != IS_STRING) {
        user = NULL;
    }

    if (zend_hash_find(ht, "PHP_AUTH_PW", sizeof("PHP_AUTH_PW"), (void **) &pass) == FAILURE) {
        pass = NULL;
    }
    else if (Z_TYPE_PP(pass) != IS_STRING) {
        pass = NULL;
    }

    if (user != NULL && pass != NULL && strcmp(admin_user, Z_STRVAL_PP(user)) == 0) {
        PHP_MD5_CTX context;
        char md5str[33];
        unsigned char digest[16];

        PHP_MD5Init(&context);
        PHP_MD5Update(&context, (unsigned char *) Z_STRVAL_PP(pass), Z_STRLEN_PP(pass));
        PHP_MD5Final(digest, &context);

        md5str[0] = '\0';
        make_digest(md5str, digest);
        if (strcmp(admin_pass, md5str) == 0) {
            return 1;
        }
    }

#define STR "WWW-authenticate: Basic Realm=\"XCache Administration\""
    sapi_add_header_ex(STR, sizeof(STR) - 1, 1, 1 TSRMLS_CC);
#undef STR
#define STR "HTTP/1.0 401 Unauthorized"
    sapi_add_header_ex(STR, sizeof(STR) - 1, 1, 1 TSRMLS_CC);
#undef STR
    ZEND_PUTS("XCache Auth Failed. User and Password is case sense\n");

    zend_bailout();
    return 0;
}
/* }}} */
/* {{{ xcache_admin_operate */
typedef enum { XC_OP_COUNT, XC_OP_INFO, XC_OP_LIST, XC_OP_CLEAR } xcache_op_type;
static void xcache_admin_operate(xcache_op_type optype, INTERNAL_FUNCTION_PARAMETERS)
{
    long type;
    int size;
    xc_cache_t **caches, *cache;
    long id = 0;

    xcache_admin_auth_check(TSRMLS_C);

    if (!xc_initized) {
        RETURN_NULL();
    }

    if (optype == XC_OP_COUNT) {
        if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &type) == FAILURE) {
            return;
        }
    }
    else if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "ll", &type, &id) == FAILURE) {
        return;
    }

    switch (type) {
        case XC_TYPE_PHP:
            size = xc_php_hcache.size;
            caches = xc_php_caches;
            break;

        case XC_TYPE_VAR:
            size = xc_var_hcache.size;
            caches = xc_var_caches;
            break;

        default:
            php_error_docref(NULL TSRMLS_CC, E_WARNING, "Unknown type %ld", type);
            RETURN_FALSE;
    }

    switch (optype) {
        case XC_OP_COUNT:
            RETURN_LONG(size)
            break;

        case XC_OP_INFO:
        case XC_OP_LIST:
            if (id < 0 || id >= size) {
                php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cache not exists");
                RETURN_FALSE;
            }

            array_init(return_value);

            cache = caches[id];
            ENTER_LOCK(cache) {
                if (optype == XC_OP_INFO) {
                    xc_fillinfo_dmz(type, cache, return_value TSRMLS_CC);
                }
                else {
                    xc_filllist_dmz(cache, return_value TSRMLS_CC);
                }
            } LEAVE_LOCK(cache);
            break;
        case XC_OP_CLEAR:
            {
                xc_entry_t *e, *next;
                int i, c;

                if (id < 0 || id >= size) {
                    php_error_docref(NULL TSRMLS_CC, E_WARNING, "Cache not exists");
                    RETURN_FALSE;
                }

                cache = caches[id];
                ENTER_LOCK(cache) {
                    for (i = 0, c = cache->hentry->size; i < c; i ++) {
                        for (e = cache->entries[i]; e; e = next) {
                            next = e->next;
                            xc_entry_remove_dmz(e TSRMLS_CC);
                        }
                        cache->entries[i] = NULL;
                    }
                } LEAVE_LOCK(cache);
                xc_gc_deletes(TSRMLS_C);
            }
            break;

        default:
            assert(0);
    }
}
/* }}} */
/* {{{ proto int xcache_count(int type)
   Return count of cache on specified cache type */
PHP_FUNCTION(xcache_count)
{
    xcache_admin_operate(XC_OP_COUNT, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto array xcache_info(int type, int id)
   Get cache info by id on specified cache type */
PHP_FUNCTION(xcache_info)
{
    xcache_admin_operate(XC_OP_INFO, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto array xcache_list(int type, int id)
   Get cache entries list by id on specified cache type */
PHP_FUNCTION(xcache_list)
{
    xcache_admin_operate(XC_OP_LIST, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto array xcache_clear_cache(int type, int id)
   Clear cache by id on specified cache type */
PHP_FUNCTION(xcache_clear_cache)
{
    xcache_admin_operate(XC_OP_CLEAR, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */

#define VAR_DISABLED_WARNING() do { \
        php_error_docref(NULL TSRMLS_CC, E_WARNING, "xcache.var_size is either 0 or too small to enable var data caching"); \
} while (0)

static int xc_entry_init_key_var(xc_entry_t *xce, zval *name TSRMLS_DC) /* {{{ */
{
    xc_hash_value_t hv;
    int cacheid;

    switch (Z_TYPE_P(name)) {
#ifdef IS_UNICODE
        case IS_UNICODE:
#endif
        case IS_STRING:
            break;
        default:
#ifdef IS_UNICODE
            convert_to_text(name);
#else
            convert_to_string(name);
#endif
    }
#ifdef IS_UNICODE
    xce->name_type = name->type;
#endif
    xce->name = name->value;

    hv = xc_entry_hash_var(xce TSRMLS_CC);

    cacheid = (hv & xc_var_hcache.mask);
    xce->cache = xc_var_caches[cacheid];
    hv >>= xc_var_hcache.bits;
    xce->hvalue = (hv & xc_var_hentry.mask);

    xce->type = XC_TYPE_VAR;
    return SUCCESS;
}
/* }}} */
/* {{{ proto mixed xcache_get(string name)
   Get cached data by specified name */
PHP_FUNCTION(xcache_get)
{
    xc_entry_t xce, *stored_xce;
    xc_entry_data_var_t var;
    zval *name;
    int found = 0;

    if (!xc_var_caches) {
        VAR_DISABLED_WARNING();
        RETURN_NULL();
    }

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &name) == FAILURE) {
        return;
    }
    xce.data.var = &var;
    xc_entry_init_key_var(&xce, name TSRMLS_CC);

    ENTER_LOCK(xce.cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            if (!VAR_ENTRY_EXPIRED(stored_xce)) {
                found = 1;
                xc_processor_restore_zval(return_value, stored_xce->data.var->value, stored_xce->data.var->have_references TSRMLS_CC);
                /* return */
                break;
            }
            else {
                xc_entry_remove_dmz(stored_xce TSRMLS_CC);
            }
        }

        RETVAL_NULL();
    } LEAVE_LOCK(xce.cache);
    if (found) {
        xce.cache->hits ++;
    }
    else {
        xce.cache->misses ++;
    }
}
/* }}} */
/* {{{ proto bool  xcache_set(string name, mixed value [, int ttl])
   Store data to cache by specified name */
PHP_FUNCTION(xcache_set)
{
    xc_entry_t xce, *stored_xce;
    xc_entry_data_var_t var;
    zval *name;
    zval *value;

    if (!xc_var_caches) {
        VAR_DISABLED_WARNING();
        RETURN_NULL();
    }

    xce.ttl = XG(var_ttl);
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "zz|l", &name, &value, &xce.ttl) == FAILURE) {
        return;
    }

    /* max ttl */
    if (xc_var_maxttl && (!xce.ttl || xce.ttl > xc_var_maxttl)) {
        xce.ttl = xc_var_maxttl;
    }

    xce.data.var = &var;
    xc_entry_init_key_var(&xce, name TSRMLS_CC);

    ENTER_LOCK(xce.cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            xc_entry_remove_dmz(stored_xce TSRMLS_CC);
        }
        var.value = value;
        RETVAL_BOOL(xc_entry_store_dmz(&xce TSRMLS_CC) != NULL ? 1 : 0);
    } LEAVE_LOCK(xce.cache);
}
/* }}} */
/* {{{ proto bool  xcache_isset(string name)
   Check if an entry exists in cache by specified name */
PHP_FUNCTION(xcache_isset)
{
    xc_entry_t xce, *stored_xce;
    xc_entry_data_var_t var;
    zval *name;
    int found = 0;

    if (!xc_var_caches) {
        VAR_DISABLED_WARNING();
        RETURN_FALSE;
    }

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &name) == FAILURE) {
        return;
    }
    xce.data.var = &var;
    xc_entry_init_key_var(&xce, name TSRMLS_CC);

    ENTER_LOCK(xce.cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            if (!VAR_ENTRY_EXPIRED(stored_xce)) {
                found = 1;
                RETVAL_TRUE;
                /* return */
                break;
            }
            else {
                xc_entry_remove_dmz(stored_xce TSRMLS_CC);
            }
        }

        RETVAL_FALSE;
    } LEAVE_LOCK(xce.cache);
    if (found) {
        xce.cache->hits ++;
    }
    else {
        xce.cache->misses ++;
    }
}
/* }}} */
/* {{{ proto bool  xcache_unset(string name)
   Unset existing data in cache by specified name */
PHP_FUNCTION(xcache_unset)
{
    xc_entry_t xce, *stored_xce;
    xc_entry_data_var_t var;
    zval *name;

    if (!xc_var_caches) {
        VAR_DISABLED_WARNING();
        RETURN_FALSE;
    }

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &name) == FAILURE) {
        return;
    }
    xce.data.var = &var;
    xc_entry_init_key_var(&xce, name TSRMLS_CC);

    ENTER_LOCK(xce.cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            xc_entry_remove_dmz(stored_xce TSRMLS_CC);
            RETVAL_TRUE;
        }
        else {
            RETVAL_FALSE;
        }
    } LEAVE_LOCK(xce.cache);
}
/* }}} */
static inline void xc_var_inc_dec(int inc, INTERNAL_FUNCTION_PARAMETERS) /* {{{ */
{
    xc_entry_t xce, *stored_xce;
    xc_entry_data_var_t var, *stored_var;
    zval *name;
    long count = 1;
    long value = 0;
    zval oldzval;

    if (!xc_var_caches) {
        VAR_DISABLED_WARNING();
        RETURN_NULL();
    }

    xce.ttl = XG(var_ttl);
    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z|ll", &name, &count, &xce.ttl) == FAILURE) {
        return;
    }

    /* max ttl */
    if (xc_var_maxttl && (!xce.ttl || xce.ttl > xc_var_maxttl)) {
        xce.ttl = xc_var_maxttl;
    }

    xce.data.var = &var;
    xc_entry_init_key_var(&xce, name TSRMLS_CC);

    ENTER_LOCK(xce.cache) {
        stored_xce = xc_entry_find_dmz(&xce TSRMLS_CC);
        if (stored_xce) {
            TRACE("incdec: gotxce %s", xce.name.str.val);
            /* timeout */
            if (VAR_ENTRY_EXPIRED(stored_xce)) {
                TRACE("%s", "incdec: expired");
                xc_entry_remove_dmz(stored_xce TSRMLS_CC);
                stored_xce = NULL;
            }
            else {
                /* do it in place */
                stored_var = stored_xce->data.var;
                if (Z_TYPE_P(stored_var->value) == IS_LONG) {
                    stored_xce->ctime = XG(request_time);
                    stored_xce->ttl   = xce.ttl;
                    TRACE("%s", "incdec: islong");
                    value = Z_LVAL_P(stored_var->value);
                    value += (inc == 1 ? count : - count);
                    RETVAL_LONG(value);
                    Z_LVAL_P(stored_var->value) = value;
                    break; /* leave lock */
                }
                else {
                    TRACE("%s", "incdec: notlong");
                    xc_processor_restore_zval(&oldzval, stored_xce->data.var->value, stored_xce->data.var->have_references TSRMLS_CC);
                    convert_to_long(&oldzval);
                    value = Z_LVAL(oldzval);
                    zval_dtor(&oldzval);
                }
            }
        }
        else {
            TRACE("incdec: %s not found", xce.name.str.val);
        }

        value += (inc == 1 ? count : - count);
        RETVAL_LONG(value);
        var.value = return_value;

        if (stored_xce) {
            xce.atime = stored_xce->atime;
            xce.ctime = stored_xce->ctime;
            xce.hits  = stored_xce->hits;
            xc_entry_remove_dmz(stored_xce TSRMLS_CC);
        }
        xc_entry_store_dmz(&xce TSRMLS_CC);

    } LEAVE_LOCK(xce.cache);
}
/* }}} */
/* {{{ proto int xcache_inc(string name [, int value [, int ttl]])
   Increase an int counter in cache by specified name, create it if not exists */
PHP_FUNCTION(xcache_inc)
{
    xc_var_inc_dec(1, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto int xcache_dec(string name [, int value [, int ttl]])
   Decrease an int counter in cache by specified name, create it if not exists */
PHP_FUNCTION(xcache_dec)
{
    xc_var_inc_dec(-1, INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto string xcache_asm(string filename)
 */
#ifdef HAVE_XCACHE_ASSEMBLER
PHP_FUNCTION(xcache_asm)
{
}
#endif
/* }}} */
#ifdef HAVE_XCACHE_DISASSEMBLER
/* {{{ proto array  xcache_dasm_file(string filename)
   Disassemble file into opcode array by filename */
PHP_FUNCTION(xcache_dasm_file)
{
    char *filename;
    int filename_len;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &filename, &filename_len) == FAILURE) {
        return;
    }
    if (!filename_len) RETURN_FALSE;

    xc_dasm_file(return_value, filename TSRMLS_CC);
}
/* }}} */
/* {{{ proto array  xcache_dasm_string(string code)
   Disassemble php code into opcode array */
PHP_FUNCTION(xcache_dasm_string)
{
    zval *code;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &code) == FAILURE) {
        return;
    }
    xc_dasm_string(return_value, code TSRMLS_CC);
}
/* }}} */
#endif
/* {{{ proto string xcache_encode(string filename)
   Encode php file into XCache opcode encoded format */
#ifdef HAVE_XCACHE_ENCODER
PHP_FUNCTION(xcache_encode)
{
}
#endif
/* }}} */
/* {{{ proto bool xcache_decode_file(string filename)
   Decode(load) opcode from XCache encoded format file */
#ifdef HAVE_XCACHE_DECODER
PHP_FUNCTION(xcache_decode_file)
{
}
#endif
/* }}} */
/* {{{ proto bool xcache_decode_string(string data)
   Decode(load) opcode from XCache encoded format data */
#ifdef HAVE_XCACHE_DECODER
PHP_FUNCTION(xcache_decode_string)
{
}
#endif
/* }}} */
/* {{{ xc_call_getter */
typedef const char *(xc_name_getter_t)(zend_uchar type);
static void xc_call_getter(xc_name_getter_t getter, int count, INTERNAL_FUNCTION_PARAMETERS)
{
    long spec;
    const char *name;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &spec) == FAILURE) {
        return;
    }
    if (spec >= 0 && spec < count) {
        name = getter((zend_uchar) spec);
        if (name) {
            /* RETURN_STRING */
            int len = strlen(name);
            return_value->value.str.len = len;
            return_value->value.str.val = estrndup(name, len);
            return_value->type = IS_STRING; 
            return;
        }
    }
    RETURN_NULL();
}
/* }}} */
/* {{{ proto string xcache_get_op_type(int op_type) */
PHP_FUNCTION(xcache_get_op_type)
{
    xc_call_getter(xc_get_op_type, xc_get_op_type_count(), INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto string xcache_get_data_type(int type) */
PHP_FUNCTION(xcache_get_data_type)
{
    xc_call_getter(xc_get_data_type, xc_get_data_type_count(), INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto string xcache_get_opcode(int opcode) */
PHP_FUNCTION(xcache_get_opcode)
{
    xc_call_getter(xc_get_opcode, xc_get_opcode_count(), INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
/* {{{ proto string xcache_get_op_spec(int op_type) */
PHP_FUNCTION(xcache_get_op_spec)
{
    xc_call_getter(xc_get_op_spec, xc_get_op_spec_count(), INTERNAL_FUNCTION_PARAM_PASSTHRU);
}
/* }}} */
#ifdef HAVE_XCACHE_OPCODE_SPEC_DEF
/* {{{ proto string xcache_get_opcode_spec(int opcode) */
PHP_FUNCTION(xcache_get_opcode_spec)
{
    long spec;
    const xc_opcode_spec_t *opspec;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "l", &spec) == FAILURE) {
        return;
    }
    if ((zend_uchar) spec <= xc_get_opcode_spec_count()) {
        opspec = xc_get_opcode_spec((zend_uchar) spec);
        if (opspec) {
            array_init(return_value);
            add_assoc_long_ex(return_value, ZEND_STRS("ext"), opspec->ext);
            add_assoc_long_ex(return_value, ZEND_STRS("op1"), opspec->op1);
            add_assoc_long_ex(return_value, ZEND_STRS("op2"), opspec->op2);
            add_assoc_long_ex(return_value, ZEND_STRS("res"), opspec->res);
            return;
        }
    }
    RETURN_NULL();
}
/* }}} */
#endif
/* {{{ proto mixed xcache_get_special_value(zval value) */
PHP_FUNCTION(xcache_get_special_value)
{
    zval *value;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "z", &value) == FAILURE) {
        return;
    }

    if (value->type == IS_CONSTANT) {
        *return_value = *value;
        zval_copy_ctor(return_value);
        return_value->type = UNISW(IS_STRING, UG(unicode) ? IS_UNICODE : IS_STRING);
        return;
    }

    if (value->type == IS_CONSTANT_ARRAY) {
        *return_value = *value;
        zval_copy_ctor(return_value);
        return_value->type = IS_ARRAY;
        return;
    }

    RETURN_NULL();
}
/* }}} */
/* {{{ proto string xcache_coredump(int op_type) */
PHP_FUNCTION(xcache_coredump)
{
    if (xc_test) {
        raise(SIGSEGV);
    }
    else {
        php_error_docref(NULL TSRMLS_CC, E_WARNING, "xcache.test must be enabled to test xcache_coredump()");
    }
}
/* }}} */
/* {{{ proto string xcache_is_autoglobal(string name) */
PHP_FUNCTION(xcache_is_autoglobal)
{
    char *name;
    int name_len;

    if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "s", &name, &name_len) == FAILURE) {
        return;
    }

    RETURN_BOOL(zend_hash_exists(CG(auto_globals), name, name_len + 1));
}
/* }}} */
static function_entry xcache_functions[] = /* {{{ */
{
    PHP_FE(xcache_count,             NULL)
    PHP_FE(xcache_info,              NULL)
    PHP_FE(xcache_list,              NULL)
    PHP_FE(xcache_clear_cache,       NULL)
    PHP_FE(xcache_coredump,          NULL)
#ifdef HAVE_XCACHE_ASSEMBLER
    PHP_FE(xcache_asm,               NULL)
#endif
#ifdef HAVE_XCACHE_DISASSEMBLER
    PHP_FE(xcache_dasm_file,         NULL)
    PHP_FE(xcache_dasm_string,       NULL)
#endif
#ifdef HAVE_XCACHE_ENCODER
    PHP_FE(xcache_encode,            NULL)
#endif
#ifdef HAVE_XCACHE_DECODER
    PHP_FE(xcache_decode_file,       NULL)
    PHP_FE(xcache_decode_string,     NULL)
#endif
#ifdef HAVE_XCACHE_COVERAGER
    PHP_FE(xcache_coverager_decode,  NULL)
    PHP_FE(xcache_coverager_start,   NULL)
    PHP_FE(xcache_coverager_stop,    NULL)
    PHP_FE(xcache_coverager_get,     NULL)
#endif
    PHP_FE(xcache_get_special_value, NULL)
    PHP_FE(xcache_get_op_type,       NULL)
    PHP_FE(xcache_get_data_type,     NULL)
    PHP_FE(xcache_get_opcode,        NULL)
#ifdef HAVE_XCACHE_OPCODE_SPEC_DEF
    PHP_FE(xcache_get_opcode_spec,   NULL)
#endif
    PHP_FE(xcache_is_autoglobal,     NULL)
    PHP_FE(xcache_inc,               NULL)
    PHP_FE(xcache_dec,               NULL)
    PHP_FE(xcache_get,               NULL)
    PHP_FE(xcache_set,               NULL)
    PHP_FE(xcache_isset,             NULL)
    PHP_FE(xcache_unset,             NULL)
    {NULL, NULL,                     NULL}
};
/* }}} */

/* old signal handlers {{{ */
typedef void (*xc_sighandler_t)(int);
#define FOREACH_SIG(sig) static xc_sighandler_t old_##sig##_handler = NULL
#include "foreachcoresig.h"
#undef FOREACH_SIG
/* }}} */
static void xcache_signal_handler(int sig);
static void xcache_restore_signal_handler() /* {{{ */
{
#define FOREACH_SIG(sig) do { \
    if (old_##sig##_handler != xcache_signal_handler) { \
        signal(sig, old_##sig##_handler); \
    } \
    else { \
        signal(sig, SIG_DFL); \
    } \
} while (0)
#include "foreachcoresig.h"
#undef FOREACH_SIG
}
/* }}} */
static void xcache_init_signal_handler() /* {{{ */
{
#define FOREACH_SIG(sig) \
    old_##sig##_handler = signal(sig, xcache_signal_handler)
#include "foreachcoresig.h"
#undef FOREACH_SIG
}
/* }}} */
static void xcache_signal_handler(int sig) /* {{{ */
{
    xcache_restore_signal_handler();
    if (xc_coredump_dir && xc_coredump_dir[0]) {
        chdir(xc_coredump_dir);
    }
    raise(sig);
}
/* }}} */

/* {{{ PHP_INI */

static PHP_INI_MH(xc_OnUpdateDummy)
{
    return SUCCESS;
}

static PHP_INI_MH(xc_OnUpdateULong)
{
    zend_ulong *p = (zend_ulong *) mh_arg1;

    *p = (zend_ulong) atoi(new_value);
    return SUCCESS;
}

static PHP_INI_MH(xc_OnUpdateBool)
{
    zend_bool *p = (zend_bool *)mh_arg1;

    if (strncasecmp("on", new_value, sizeof("on"))) {
        *p = (zend_bool) atoi(new_value);
    }
    else {
        *p = (zend_bool) 1;
    }
    return SUCCESS;
}

static PHP_INI_MH(xc_OnUpdateString)
{
    char **p = (char**)mh_arg1;
    if (*p) {
        pefree(*p, 1);
    }
    *p = pemalloc(strlen(new_value) + 1, 1);
    strcpy(*p, new_value);
    return SUCCESS;
}

#ifndef ZEND_ENGINE_2
#define OnUpdateLong OnUpdateInt
#endif

#ifdef ZEND_WIN32
#   define DEFAULT_PATH "xcache"
#else
#   define DEFAULT_PATH "/dev/zero"
#endif
PHP_INI_BEGIN()
    PHP_INI_ENTRY1     ("xcache.mmap_path",     DEFAULT_PATH, PHP_INI_SYSTEM, xc_OnUpdateString,   &xc_mmap_path)
    PHP_INI_ENTRY1     ("xcache.coredump_directory",      "", PHP_INI_SYSTEM, xc_OnUpdateString,   &xc_coredump_dir)
    PHP_INI_ENTRY1     ("xcache.test",                   "0", PHP_INI_SYSTEM, xc_OnUpdateBool,     &xc_test)
    PHP_INI_ENTRY1     ("xcache.readonly_protection",    "0", PHP_INI_SYSTEM, xc_OnUpdateBool,     &xc_readonly_protection)
    /* opcode cache */
    PHP_INI_ENTRY1     ("xcache.size",                   "0", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.count",                  "1", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.slots",                 "8K", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.shm_scheme",          "mmap", PHP_INI_SYSTEM, xc_OnUpdateString,   &xc_shm_scheme)
    PHP_INI_ENTRY1     ("xcache.ttl",                    "0", PHP_INI_SYSTEM, xc_OnUpdateULong,    &xc_php_ttl)
    PHP_INI_ENTRY1     ("xcache.gc_interval",            "0", PHP_INI_SYSTEM, xc_OnUpdateULong,    &xc_php_gc_interval)
    /* var cache */
    PHP_INI_ENTRY1     ("xcache.var_size",               "0", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.var_count",              "1", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.var_slots",             "8K", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
    PHP_INI_ENTRY1     ("xcache.var_maxttl",             "0", PHP_INI_SYSTEM, xc_OnUpdateULong,    &xc_var_maxttl)
    PHP_INI_ENTRY1     ("xcache.var_gc_interval",      "120", PHP_INI_SYSTEM, xc_OnUpdateULong,    &xc_var_gc_interval)

    STD_PHP_INI_BOOLEAN("xcache.cacher",                 "1", PHP_INI_ALL,    OnUpdateBool,        cacher,            zend_xcache_globals, xcache_globals)
    STD_PHP_INI_BOOLEAN("xcache.stat",                   "1", PHP_INI_ALL,    OnUpdateBool,        stat,              zend_xcache_globals, xcache_globals)
    STD_PHP_INI_BOOLEAN("xcache.experimental",           "0", PHP_INI_ALL,    OnUpdateBool,        experimental,      zend_xcache_globals, xcache_globals)
#ifdef HAVE_XCACHE_OPTIMIZER
    STD_PHP_INI_BOOLEAN("xcache.optimizer",              "0", PHP_INI_ALL,    OnUpdateBool,        optimizer,         zend_xcache_globals, xcache_globals)
#endif
    STD_PHP_INI_ENTRY  ("xcache.var_ttl",                "0", PHP_INI_ALL,    OnUpdateLong,        var_ttl,           zend_xcache_globals, xcache_globals)
#ifdef HAVE_XCACHE_COVERAGER
    STD_PHP_INI_BOOLEAN("xcache.coverager"      ,        "0", PHP_INI_ALL,    OnUpdateBool,        coverager,         zend_xcache_globals, xcache_globals)
    PHP_INI_ENTRY1     ("xcache.coveragedump_directory",  "", PHP_INI_SYSTEM, xc_OnUpdateDummy,    NULL)
#endif
PHP_INI_END()
/* }}} */
/* {{{ PHP_MINFO_FUNCTION(xcache) */
static PHP_MINFO_FUNCTION(xcache)
{
    char buf[100];
    char *ptr;
    int left, len;
    xc_shm_scheme_t *scheme;
    char *covdumpdir;

    php_info_print_table_start();
    php_info_print_table_header(2, "XCache Support", "enabled");
    php_info_print_table_row(2, "Version", XCACHE_VERSION);
    php_info_print_table_row(2, "Modules Built", XCACHE_MODULES);
    php_info_print_table_row(2, "Readonly Protection", xc_readonly_protection ? "enabled" : "N/A");

    if (xc_php_size) {
        ptr = _php_math_number_format(xc_php_size, 0, '.', ',');
        snprintf(buf, sizeof(buf), "enabled, %s bytes, %d split(s), with %d slots each", ptr, xc_php_hcache.size, xc_php_hentry.size);
        php_info_print_table_row(2, "Opcode Cache", buf);
        efree(ptr);
    }
    else {
        php_info_print_table_row(2, "Opcode Cache", "disabled");
    }
    if (xc_var_size) {
        ptr = _php_math_number_format(xc_var_size, 0, '.', ',');
        snprintf(buf, sizeof(buf), "enabled, %s bytes, %d split(s), with %d slots each", ptr, xc_var_hcache.size, xc_var_hentry.size);
        php_info_print_table_row(2, "Variable Cache", buf);
        efree(ptr);
    }
    else {
        php_info_print_table_row(2, "Variable Cache", "disabled");
    }

    left = sizeof(buf);
    ptr = buf;
    buf[0] = '\0';
    for (scheme = xc_shm_scheme_first(); scheme; scheme = xc_shm_scheme_next(scheme)) {
        len = snprintf(ptr, left, ptr == buf ? "%s" : ", %s", xc_shm_scheme_name(scheme));
        left -= len;
        ptr += len;
    }
    php_info_print_table_row(2, "Shared Memory Schemes", buf);

#ifdef HAVE_XCACHE_COVERAGER
    if (cfg_get_string("xcache.coveragedump_directory", &covdumpdir) != SUCCESS || !covdumpdir[0]) {
        covdumpdir = NULL;
    }
    php_info_print_table_row(2, "Coverage Auto Dumper", XG(coverager) && covdumpdir ? "enabled" : "disabled");
#endif
    php_info_print_table_end();

    DISPLAY_INI_ENTRIES();
}
/* }}} */
/* {{{ extension startup */
static void xc_zend_extension_register(zend_extension *new_extension, DL_HANDLE handle)
{
    zend_extension extension;

    extension = *new_extension;
    extension.handle = handle;

    zend_extension_dispatch_message(ZEND_EXTMSG_NEW_EXTENSION, &extension);

    zend_llist_prepend_element(&zend_extensions, &extension);
    TRACE("%s", "registered");
}

static zend_llist_element *xc_llist_get_element_by_zend_extension(zend_llist *l, const char *extension_name)
{
    zend_llist_element *element;

    for (element = zend_extensions.head; element; element = element->next) {
        zend_extension *extension = (zend_extension *) element->data;

        if (!strcmp(extension->name, extension_name)) {
            return element;
        }
    }
    return NULL;
}

static void xc_llist_prepend(zend_llist *l, zend_llist_element *element)
{
    element->next = l->head;
    element->prev = NULL;
    if (l->head) {
        l->head->prev = element;
    }
    else {
        l->tail = element;
    }
    l->head = element;
    ++l->count;
}

static void xc_llist_unlink(zend_llist *l, zend_llist_element *element)
{
    if ((element)->prev) {
        (element)->prev->next = (element)->next;
    }
    else {
        (l)->head = (element)->next;
    }

    if ((element)->next) {
        (element)->next->prev = (element)->prev;
    }
    else {
        (l)->tail = (element)->prev;
    }

    --l->count;
}

static int xc_zend_extension_startup(zend_extension *extension)
{
    if (extension->startup) {
        if (extension->startup(extension) != SUCCESS) {
            return FAILURE;
        }
    }
    return SUCCESS;
}
/* }}} */
static int xc_ptr_compare_func(void *p1, void *p2) /* {{{ */
{
    return p1 == p2;
}
/* }}} */
static int xc_zend_remove_extension(zend_extension *extension) /* {{{ */
{
    llist_dtor_func_t dtor;

    assert(extension);
    dtor = zend_extensions.dtor; /* avoid dtor */
    zend_extensions.dtor = NULL;
    zend_llist_del_element(&zend_extensions, extension, xc_ptr_compare_func);
    zend_extensions.dtor = dtor;
    return SUCCESS;
}
/* }}} */
static int xc_config_hash(xc_hash_t *p, char *name, char *default_value) /* {{{ */
{
    int bits, size;
    char *value;

    if (cfg_get_string(name, &value) != SUCCESS) {
        value = default_value;
    }

    p->size = zend_atoi(value, strlen(value));
    for (size = 1, bits = 1; size < p->size; bits ++, size <<= 1) {
        /* empty body */
    }
    p->size = size;
    p->bits = bits;
    p->mask = size - 1;

    return SUCCESS;
}
/* }}} */
static int xc_config_long(zend_ulong *p, char *name, char *default_value) /* {{{ */
{
    char *value;

    if (cfg_get_string(name, &value) != SUCCESS) {
        value = default_value;
    }

    *p = zend_atoi(value, strlen(value));
    return SUCCESS;
}
/* }}} */
/* {{{ PHP_MINIT_FUNCTION(xcache) */
static PHP_MINIT_FUNCTION(xcache)
{
    char *env;
    zend_extension *ext;
    zend_llist_position lpos;

    xc_module_gotup = 1;
    if (!xc_zend_extension_gotup) {
        xc_zend_extension_register(&zend_extension_entry, 0);
        xc_zend_extension_startup(&zend_extension_entry);
        xc_zend_extension_faked = 1;
    }

    ext = zend_get_extension("Zend Optimizer");
    if (ext) {
        /* zend_optimizer.optimization_level>0 is not compatible with other cacher, disabling */
        ext->op_array_handler = NULL;
    }
    /* cache if there's an op_array_ctor */
    for (ext = zend_llist_get_first_ex(&zend_extensions, &lpos);
            ext;
            ext = zend_llist_get_next_ex(&zend_extensions, &lpos)) {
        if (ext->op_array_ctor) {
            xc_have_op_array_ctor = 1;
            break;
        }
    }


#ifndef PHP_GINIT
    ZEND_INIT_MODULE_GLOBALS(xcache, xc_init_globals, xc_shutdown_globals);
#endif
    REGISTER_INI_ENTRIES();

    if (strcmp(sapi_module.name, "cli") == 0) {
        if ((env = getenv("XCACHE_TEST")) != NULL) {
            zend_alter_ini_entry("xcache.test", sizeof("xcache.test"), env, strlen(env) + 1, PHP_INI_SYSTEM, PHP_INI_STAGE_STARTUP);
        }
        if (!xc_test) {
            /* disable cache for cli except for test */
            xc_php_size = xc_var_size = 0;
        }
    }

    xc_config_long(&xc_php_size,       "xcache.size",        "0");
    xc_config_hash(&xc_php_hcache,     "xcache.count",       "1");
    xc_config_hash(&xc_php_hentry,     "xcache.slots",      "8K");

    xc_config_long(&xc_var_size,       "xcache.var_size",    "0");
    xc_config_hash(&xc_var_hcache,     "xcache.var_count",   "1");
    xc_config_hash(&xc_var_hentry,     "xcache.var_slots",  "8K");

    if (xc_php_size <= 0) {
        xc_php_size = xc_php_hcache.size = 0;
    }
    if (xc_var_size <= 0) {
        xc_var_size = xc_var_hcache.size = 0;
    }

    if (xc_coredump_dir && xc_coredump_dir[0]) {
        xcache_init_signal_handler();
    }

    xc_init_constant(module_number TSRMLS_CC);
    xc_shm_init_modules();

    if ((xc_php_size || xc_var_size) && xc_mmap_path && xc_mmap_path[0]) {
        if (xc_init(module_number TSRMLS_CC) != SUCCESS) {
            zend_error(E_ERROR, "XCache: Cannot init");
            goto err_init;
        }
        xc_initized = 1;
    }

#ifdef HAVE_XCACHE_COVERAGER
    xc_coverager_init(module_number TSRMLS_CC);
#endif

    return SUCCESS;

err_init:
    return FAILURE;
}
/* }}} */
/* {{{ PHP_MSHUTDOWN_FUNCTION(xcache) */
static PHP_MSHUTDOWN_FUNCTION(xcache)
{
    if (xc_initized) {
        xc_destroy();
    }
    if (xc_mmap_path) {
        pefree(xc_mmap_path, 1);
        xc_mmap_path = NULL;
    }
    if (xc_shm_scheme) {
        pefree(xc_shm_scheme, 1);
        xc_shm_scheme = NULL;
    }

#ifdef HAVE_XCACHE_COVERAGER
    xc_coverager_destroy();
#endif

    if (xc_coredump_dir && xc_coredump_dir[0]) {
        xcache_restore_signal_handler();
    }
    if (xc_coredump_dir) {
        pefree(xc_coredump_dir, 1);
        xc_coredump_dir = NULL;
    }
#ifndef PHP_GINIT
#   ifdef ZTS
    ts_free_id(xcache_globals_id);
#   else
    xc_shutdown_globals(&xcache_globals TSRMLS_CC);
#   endif
#endif

    if (xc_zend_extension_faked) {
        zend_extension *ext = zend_get_extension(XCACHE_NAME);
        if (ext->shutdown) {
            ext->shutdown(ext);
        }
        xc_zend_remove_extension(ext);
    }
    UNREGISTER_INI_ENTRIES();

    xc_module_gotup = 0;
    xc_zend_extension_gotup = 0;
    xc_zend_extension_faked = 0;

    return SUCCESS;
}
/* }}} */
/* {{{ PHP_RINIT_FUNCTION(xcache) */
static PHP_RINIT_FUNCTION(xcache)
{
    xc_request_init(TSRMLS_C);
    return SUCCESS;
}
/* }}} */
/* {{{ PHP_RSHUTDOWN_FUNCTION(xcache) */
#ifndef ZEND_ENGINE_2
static PHP_RSHUTDOWN_FUNCTION(xcache)
#else
static ZEND_MODULE_POST_ZEND_DEACTIVATE_D(xcache)
#endif
{
#ifdef ZEND_ENGINE_2
    TSRMLS_FETCH();
#endif

    xc_request_shutdown(TSRMLS_C);
    return SUCCESS;
}
/* }}} */
/* {{{ module definition structure */

zend_module_entry xcache_module_entry = {
    STANDARD_MODULE_HEADER,
    "XCache",
    xcache_functions,
    PHP_MINIT(xcache),
    PHP_MSHUTDOWN(xcache),
    PHP_RINIT(xcache),
#ifndef ZEND_ENGINE_2
    PHP_RSHUTDOWN(xcache),
#else
    NULL,
#endif
    PHP_MINFO(xcache),
    XCACHE_VERSION,
#ifdef PHP_GINIT
    PHP_MODULE_GLOBALS(xcache),
    PHP_GINIT(xcache),
    PHP_GSHUTDOWN(xcache),
#endif
#ifdef ZEND_ENGINE_2
    ZEND_MODULE_POST_ZEND_DEACTIVATE_N(xcache),
#else
    NULL,
    NULL,
#endif
    STANDARD_MODULE_PROPERTIES_EX
};

#ifdef COMPILE_DL_XCACHE
ZEND_GET_MODULE(xcache)
#endif
/* }}} */
static startup_func_t xc_last_ext_startup;
static int xc_zend_startup_last(zend_extension *extension) /* {{{ */
{
    /* restore */
    extension->startup = xc_last_ext_startup;
    if (extension->startup) {
        if (extension->startup(extension) != SUCCESS) {
            return FAILURE;
        }
    }
    assert(xc_llist_zend_extension);
    xc_llist_prepend(&zend_extensions, xc_llist_zend_extension);
    if (!xc_module_gotup) {
        return zend_startup_module(&xcache_module_entry);
    }
    return SUCCESS;
}
/* }}} */
ZEND_DLEXPORT int xcache_zend_startup(zend_extension *extension) /* {{{ */
{
    xc_zend_extension_gotup = 1;

    if (!origin_compile_file) {
        origin_compile_file = zend_compile_file;
        zend_compile_file = xc_check_initial_compile_file;
    }

    if (zend_llist_count(&zend_extensions) > 1) {
        zend_llist_position lpos;
        zend_extension *ext;

        xc_llist_zend_extension = xc_llist_get_element_by_zend_extension(&zend_extensions, XCACHE_NAME);
        xc_llist_unlink(&zend_extensions, xc_llist_zend_extension);

        ext = (zend_extension *) zend_llist_get_last_ex(&zend_extensions, &lpos);
        assert(ext && ext != xc_llist_zend_extension);
        xc_last_ext_startup = ext->startup;
        ext->startup = xc_zend_startup_last;
    }
    else if (!xc_module_gotup) {
        return zend_startup_module(&xcache_module_entry);
    }
    return SUCCESS;
}
/* }}} */
ZEND_DLEXPORT void xcache_zend_shutdown(zend_extension *extension) /* {{{ */
{
    /* empty */
}
/* }}} */
ZEND_DLEXPORT void xcache_statement_handler(zend_op_array *op_array) /* {{{ */
{
#ifdef HAVE_XCACHE_COVERAGER
    xc_coverager_handle_ext_stmt(op_array, ZEND_EXT_STMT);
#endif
}
/* }}} */
ZEND_DLEXPORT void xcache_fcall_begin_handler(zend_op_array *op_array) /* {{{ */
{
#if 0
    xc_coverager_handle_ext_stmt(op_array, ZEND_EXT_FCALL_BEGIN);
#endif
}
/* }}} */
ZEND_DLEXPORT void xcache_fcall_end_handler(zend_op_array *op_array) /* {{{ */
{
#if 0
    xc_coverager_handle_ext_stmt(op_array, ZEND_EXT_FCALL_END);
#endif
}
/* }}} */
/* {{{ zend extension definition structure */
ZEND_DLEXPORT zend_extension zend_extension_entry = {
    XCACHE_NAME,
    XCACHE_VERSION,
    XCACHE_AUTHOR,
    XCACHE_URL,
    XCACHE_COPYRIGHT,
    xcache_zend_startup,
    xcache_zend_shutdown,
    NULL,           /* activate_func_t */
    NULL,           /* deactivate_func_t */
    NULL,           /* message_handler_func_t */
    NULL,           /* op_array_handler_func_t */
    xcache_statement_handler,
    xcache_fcall_begin_handler,
    xcache_fcall_end_handler,
    NULL,           /* op_array_ctor_func_t */
    NULL,           /* op_array_dtor_func_t */
    STANDARD_ZEND_EXTENSION_PROPERTIES
};

#ifndef ZEND_EXT_API
#   define ZEND_EXT_API ZEND_DLEXPORT
#endif
#if COMPILE_DL_XCACHE
ZEND_EXTENSION();
#endif
/* }}} */