src/core/ngx_cycle.c:75: error: Integer Overflow L2
  ([0, +oo] - 1):unsigned64 by call to `ngx_create_pool`.

src/core/ngx_cycle.c:75:12: Call
73.     log = old_cycle->log;
74. 
75.     pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);
               ^
76.     if (pool == NULL) {
77.         return NULL;

src/core/ngx_palloc.c:15:1: <LHS trace>
13. 
14. 
15. ngx_pool_t *
    ^
16. ngx_create_pool(size_t size, ngx_log_t *log)
17. {

src/core/ngx_palloc.c:15:1: Global `ngx_pagesize`
  13. 
  14. 
  15. ngx_pool_t *
      ^
  16. ngx_create_pool(size_t size, ngx_log_t *log)
  17. {

src/core/ngx_palloc.c:30:15: Binary operation: ([0, +oo] - 1):unsigned64 by call to `ngx_create_pool` 
  28. 
  29.     size = size - sizeof(ngx_pool_t);
  30.     p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL;
                    ^
  31. 
  32.     p->current = p;

ngx_pool_t *
ngx_create_pool(size_t size, ngx_log_t *log)
{
    ngx_pool_t  *p;
    p = ngx_alloc(size, log);
    if (p == NULL) {
        return NULL;
    }
    p->d.last = (u_char *) p + sizeof(ngx_pool_t);
    p->d.end = (u_char *) p + size;
    p->d.next = NULL;
    size = size - sizeof(ngx_pool_t);
    p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL;
    p->current = p;
    p->chain = NULL;
    p->large = NULL;
    p->cleanup = NULL;
    p->log = log;
    return p;
}
['ngx_cycle_t *\nngx_init_cycle(ngx_cycle_t *old_cycle)\n{\n    void                *rv;\n    char               **senv, **env;\n    u_char              *lock_file;\n    ngx_uint_t           i, n;\n    ngx_log_t           *log;\n    ngx_time_t          *tp;\n    ngx_conf_t           conf;\n    ngx_pool_t          *pool;\n    ngx_cycle_t         *cycle, **old;\n    ngx_shm_zone_t      *shm_zone, *oshm_zone;\n    ngx_slab_pool_t     *shpool;\n    ngx_list_part_t     *part, *opart;\n    ngx_open_file_t     *file;\n    ngx_listening_t     *ls, *nls;\n    ngx_core_conf_t     *ccf, *old_ccf;\n    ngx_core_module_t   *module;\n    char                 hostname[NGX_MAXHOSTNAMELEN];\n    ngx_timezone_update();\n    tp = ngx_timeofday();\n    tp->sec = 0;\n    ngx_time_update(0, 0);\n    log = old_cycle->log;\n    pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);\n    if (pool == NULL) {\n        return NULL;\n    }\n    pool->log = log;\n    cycle = ngx_pcalloc(pool, sizeof(ngx_cycle_t));\n    if (cycle == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    cycle->pool = pool;\n    cycle->log = log;\n    cycle->old_cycle = old_cycle;\n    cycle->root.len = sizeof(NGX_PREFIX) - 1;\n    cycle->root.data = (u_char *) NGX_PREFIX;\n    cycle->conf_file.len = old_cycle->conf_file.len;\n    cycle->conf_file.data = ngx_pnalloc(pool, old_cycle->conf_file.len + 1);\n    if (cycle->conf_file.data == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    ngx_cpystrn(cycle->conf_file.data, old_cycle->conf_file.data,\n                old_cycle->conf_file.len + 1);\n    cycle->conf_param.len = old_cycle->conf_param.len;\n    cycle->conf_param.data = ngx_pnalloc(pool, old_cycle->conf_param.len);\n    if (cycle->conf_param.data == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    ngx_memcpy(cycle->conf_param.data, old_cycle->conf_param.data,\n               old_cycle->conf_param.len);\n    n = old_cycle->pathes.nelts ? old_cycle->pathes.nelts : 10;\n    cycle->pathes.elts = ngx_pcalloc(pool, n * sizeof(ngx_path_t *));\n    if (cycle->pathes.elts == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    cycle->pathes.nelts = 0;\n    cycle->pathes.size = sizeof(ngx_path_t *);\n    cycle->pathes.nalloc = n;\n    cycle->pathes.pool = pool;\n    if (old_cycle->open_files.part.nelts) {\n        n = old_cycle->open_files.part.nelts;\n        for (part = old_cycle->open_files.part.next; part; part = part->next) {\n            n += part->nelts;\n        }\n    } else {\n        n = 20;\n    }\n    if (ngx_list_init(&cycle->open_files, pool, n, sizeof(ngx_open_file_t))\n        != NGX_OK)\n    {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    if (old_cycle->shared_memory.part.nelts) {\n        n = old_cycle->shared_memory.part.nelts;\n        for (part = old_cycle->shared_memory.part.next; part; part = part->next)\n        {\n            n += part->nelts;\n        }\n    } else {\n        n = 1;\n    }\n    if (ngx_list_init(&cycle->shared_memory, pool, n, sizeof(ngx_shm_zone_t))\n        != NGX_OK)\n    {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    cycle->new_log = ngx_log_create_errlog(cycle, NULL);\n    if (cycle->new_log == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    cycle->new_log->file->name = error_log;\n    n = old_cycle->listening.nelts ? old_cycle->listening.nelts : 10;\n    cycle->listening.elts = ngx_pcalloc(pool, n * sizeof(ngx_listening_t));\n    if (cycle->listening.elts == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    cycle->listening.nelts = 0;\n    cycle->listening.size = sizeof(ngx_listening_t);\n    cycle->listening.nalloc = n;\n    cycle->listening.pool = pool;\n    cycle->conf_ctx = ngx_pcalloc(pool, ngx_max_module * sizeof(void *));\n    if (cycle->conf_ctx == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    if (gethostname(hostname, NGX_MAXHOSTNAMELEN) == -1) {\n        ngx_log_error(NGX_LOG_EMERG, log, ngx_errno, "gethostname() failed");\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    hostname[NGX_MAXHOSTNAMELEN - 1] = \'\\0\';\n    cycle->hostname.len = ngx_strlen(hostname);\n    cycle->hostname.data = ngx_pnalloc(pool, cycle->hostname.len);\n    if (cycle->hostname.data == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    ngx_memcpy(cycle->hostname.data, hostname, cycle->hostname.len);\n    for (i = 0; ngx_modules[i]; i++) {\n        if (ngx_modules[i]->type != NGX_CORE_MODULE) {\n            continue;\n        }\n        module = ngx_modules[i]->ctx;\n        if (module->create_conf) {\n            rv = module->create_conf(cycle);\n            if (rv == NGX_CONF_ERROR) {\n                ngx_destroy_pool(pool);\n                return NULL;\n            }\n            cycle->conf_ctx[ngx_modules[i]->index] = rv;\n        }\n    }\n    senv = environ;\n    ngx_memzero(&conf, sizeof(ngx_conf_t));\n    conf.args = ngx_array_create(pool, 10, sizeof(ngx_str_t));\n    if (conf.args == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    conf.temp_pool = ngx_create_pool(NGX_CYCLE_POOL_SIZE, log);\n    if (conf.temp_pool == NULL) {\n        ngx_destroy_pool(pool);\n        return NULL;\n    }\n    conf.ctx = cycle->conf_ctx;\n    conf.cycle = cycle;\n    conf.pool = pool;\n    conf.log = log;\n    conf.module_type = NGX_CORE_MODULE;\n    conf.cmd_type = NGX_MAIN_CONF;\n#if 0\n    log->log_level = NGX_LOG_DEBUG_ALL;\n#endif\n    if (ngx_conf_param(&conf) != NGX_CONF_OK) {\n        ngx_destroy_cycle_pools(&conf);\n        return NULL;\n    }\n    if (ngx_conf_parse(&conf, &cycle->conf_file) != NGX_CONF_OK) {\n        ngx_destroy_cycle_pools(&conf);\n        return NULL;\n    }\n    if (ngx_test_config) {\n        ngx_log_error(NGX_LOG_INFO, log, 0,\n                      "the configuration file %s syntax is ok",\n                      cycle->conf_file.data);\n    }\n    for (i = 0; ngx_modules[i]; i++) {\n        if (ngx_modules[i]->type != NGX_CORE_MODULE) {\n            continue;\n        }\n        module = ngx_modules[i]->ctx;\n        if (module->init_conf) {\n            if (module->init_conf(cycle, cycle->conf_ctx[ngx_modules[i]->index])\n                == NGX_CONF_ERROR)\n            {\n                ngx_destroy_cycle_pools(&conf);\n                return NULL;\n            }\n        }\n    }\n    ccf = (ngx_core_conf_t *) ngx_get_conf(cycle->conf_ctx, ngx_core_module);\n#if !(NGX_WIN32)\n    if (ngx_test_config) {\n        if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {\n            goto failed;\n        }\n    } else if (!ngx_is_init_cycle(old_cycle)) {\n        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,\n                                                   ngx_core_module);\n        if (ccf->pid.len != old_ccf->pid.len\n            || ngx_strcmp(ccf->pid.data, old_ccf->pid.data) != 0)\n        {\n            if (ngx_create_pidfile(&ccf->pid, log) != NGX_OK) {\n                goto failed;\n            }\n            ngx_delete_pidfile(old_cycle);\n        }\n    }\n#endif\n    if (ngx_test_lockfile(cycle->lock_file.data, log) != NGX_OK) {\n        goto failed;\n    }\n    if (ngx_create_pathes(cycle, ccf->user) != NGX_OK) {\n        goto failed;\n    }\n    part = &cycle->open_files.part;\n    file = part->elts;\n    for (i = 0;   ; i++) {\n        if (i >= part->nelts) {\n            if (part->next == NULL) {\n                break;\n            }\n            part = part->next;\n            file = part->elts;\n            i = 0;\n        }\n        if (file[i].name.data == NULL) {\n            continue;\n        }\n        file[i].fd = ngx_open_file(file[i].name.data,\n                                   NGX_FILE_APPEND,\n                                   NGX_FILE_CREATE_OR_OPEN,\n                                   NGX_FILE_DEFAULT_ACCESS);\n        ngx_log_debug3(NGX_LOG_DEBUG_CORE, log, 0,\n                       "log: %p %d \\"%s\\"",\n                       &file[i], file[i].fd, file[i].name.data);\n        if (file[i].fd == NGX_INVALID_FILE) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,\n                          ngx_open_file_n " \\"%s\\" failed",\n                          file[i].name.data);\n            goto failed;\n        }\n#if !(NGX_WIN32)\n        if (fcntl(file[i].fd, F_SETFD, FD_CLOEXEC) == -1) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,\n                          "fcntl(FD_CLOEXEC) \\"%s\\" failed",\n                          file[i].name.data);\n            goto failed;\n        }\n#endif\n    }\n    cycle->log = cycle->new_log;\n    pool->log = cycle->new_log;\n    if (cycle->log->log_level == 0) {\n        cycle->log->log_level = NGX_LOG_ERR;\n    }\n    part = &cycle->shared_memory.part;\n    shm_zone = part->elts;\n    for (i = 0;   ; i++) {\n        if (i >= part->nelts) {\n            if (part->next == NULL) {\n                break;\n            }\n            part = part->next;\n            shm_zone = part->elts;\n            i = 0;\n        }\n        if (shm_zone[i].shm.size == 0) {\n            ngx_log_error(NGX_LOG_EMERG, log, 0,\n                          "zero size shared memory zone \\"%V\\"",\n                          &shm_zone[i].name);\n            goto failed;\n        }\n        if (shm_zone[i].init == NULL) {\n            continue;\n        }\n        shm_zone[i].shm.log = cycle->log;\n        opart = &old_cycle->shared_memory.part;\n        oshm_zone = opart->elts;\n        for (n = 0;   ; n++) {\n            if (n >= opart->nelts) {\n                if (opart->next == NULL) {\n                    break;\n                }\n                opart = opart->next;\n                oshm_zone = opart->elts;\n                n = 0;\n            }\n            if (shm_zone[i].name.len != oshm_zone[n].name.len) {\n                continue;\n            }\n            if (ngx_strncmp(shm_zone[i].name.data, oshm_zone[n].name.data,\n                            shm_zone[i].name.len)\n                != 0)\n            {\n                continue;\n            }\n            if (shm_zone[i].shm.size == oshm_zone[n].shm.size) {\n                shm_zone[i].shm.addr = oshm_zone[n].shm.addr;\n                if (shm_zone[i].init(&shm_zone[i], oshm_zone[n].data)\n                    != NGX_OK)\n                {\n                    goto failed;\n                }\n                goto shm_zone_found;\n            }\n            ngx_shm_free(&oshm_zone[n].shm);\n            break;\n        }\n        if (ngx_shm_alloc(&shm_zone[i].shm) != NGX_OK) {\n            goto failed;\n        }\n        shpool = (ngx_slab_pool_t *) shm_zone[i].shm.addr;\n        shpool->end = shm_zone[i].shm.addr + shm_zone[i].shm.size;\n        shpool->min_shift = 3;\n#if (NGX_HAVE_ATOMIC_OPS)\n        lock_file = NULL;\n#else\n        lock_file = ngx_pnalloc(cycle->pool,\n                                cycle->lock_file.len + shm_zone[i].name.len);\n        if (lock_file == NULL) {\n            goto failed;\n        }\n        (void) ngx_cpystrn(ngx_cpymem(lock_file, cycle->lock_file.data,\n                                      cycle->lock_file.len),\n                           shm_zone[i].name.data, shm_zone[i].name.len + 1);\n#endif\n        if (ngx_shmtx_create(&shpool->mutex, (void *) &shpool->lock, lock_file)\n            != NGX_OK)\n        {\n            goto failed;\n        }\n        ngx_slab_init(shpool);\n        if (shm_zone[i].init(&shm_zone[i], NULL) != NGX_OK) {\n            goto failed;\n        }\n    shm_zone_found:\n        continue;\n    }\n    if (old_cycle->listening.nelts) {\n        ls = old_cycle->listening.elts;\n        for (i = 0; i < old_cycle->listening.nelts; i++) {\n            ls[i].remain = 0;\n        }\n        nls = cycle->listening.elts;\n        for (n = 0; n < cycle->listening.nelts; n++) {\n            for (i = 0; i < old_cycle->listening.nelts; i++) {\n                if (ls[i].ignore) {\n                    continue;\n                }\n                if (ngx_cmp_sockaddr(nls[n].sockaddr, ls[i].sockaddr) == NGX_OK)\n                {\n                    nls[n].fd = ls[i].fd;\n                    nls[n].previous = &ls[i];\n                    ls[i].remain = 1;\n                    if (ls[n].backlog != nls[i].backlog) {\n                        nls[n].listen = 1;\n                    }\n#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)\n                    nls[n].deferred_accept = ls[i].deferred_accept;\n                    if (ls[i].accept_filter && nls[n].accept_filter) {\n                        if (ngx_strcmp(ls[i].accept_filter,\n                                       nls[n].accept_filter)\n                            != 0)\n                        {\n                            nls[n].delete_deferred = 1;\n                            nls[n].add_deferred = 1;\n                        }\n                    } else if (ls[i].accept_filter) {\n                        nls[n].delete_deferred = 1;\n                    } else if (nls[n].accept_filter) {\n                        nls[n].add_deferred = 1;\n                    }\n#endif\n#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)\n                    if (ls[n].deferred_accept && !nls[n].deferred_accept) {\n                        nls[n].delete_deferred = 1;\n                    } else if (ls[i].deferred_accept != nls[n].deferred_accept)\n                    {\n                        nls[n].add_deferred = 1;\n                    }\n#endif\n                    break;\n                }\n            }\n            if (nls[n].fd == -1) {\n                nls[n].open = 1;\n            }\n        }\n    } else {\n        ls = cycle->listening.elts;\n        for (i = 0; i < cycle->listening.nelts; i++) {\n            ls[i].open = 1;\n#if (NGX_HAVE_DEFERRED_ACCEPT && defined SO_ACCEPTFILTER)\n            if (ls[i].accept_filter) {\n                ls[i].add_deferred = 1;\n            }\n#endif\n#if (NGX_HAVE_DEFERRED_ACCEPT && defined TCP_DEFER_ACCEPT)\n            if (ls[i].deferred_accept) {\n                ls[i].add_deferred = 1;\n            }\n#endif\n        }\n    }\n    if (ngx_open_listening_sockets(cycle) != NGX_OK) {\n        goto failed;\n    }\n    if (!ngx_test_config) {\n        ngx_configure_listening_socket(cycle);\n    }\n#if !(NGX_WIN32)\n    if (!ngx_test_config && cycle->log->file->fd != STDERR_FILENO) {\n        ngx_log_debug3(NGX_LOG_DEBUG_CORE, log, 0,\n                       "dup2: %p %d \\"%s\\"",\n                       cycle->log->file,\n                       cycle->log->file->fd, cycle->log->file->name.data);\n        if (dup2(cycle->log->file->fd, STDERR_FILENO) == -1) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,\n                          "dup2(STDERR) failed");\n            exit(1);\n        }\n    }\n#endif\n    pool->log = cycle->log;\n    for (i = 0; ngx_modules[i]; i++) {\n        if (ngx_modules[i]->init_module) {\n            if (ngx_modules[i]->init_module(cycle) != NGX_OK) {\n                exit(1);\n            }\n        }\n    }\n    opart = &old_cycle->shared_memory.part;\n    oshm_zone = opart->elts;\n    for (i = 0;   ; i++) {\n        if (i >= opart->nelts) {\n            if (opart->next == NULL) {\n                goto old_shm_zone_done;\n            }\n            opart = opart->next;\n            oshm_zone = opart->elts;\n            i = 0;\n        }\n        part = &cycle->shared_memory.part;\n        shm_zone = part->elts;\n        for (n = 0;   ; n++) {\n            if (n >= part->nelts) {\n                if (part->next == NULL) {\n                    break;\n                }\n                part = part->next;\n                shm_zone = part->elts;\n                n = 0;\n            }\n            if (oshm_zone[i].name.len == shm_zone[n].name.len\n                && ngx_strncmp(oshm_zone[i].name.data,\n                               shm_zone[n].name.data,\n                               oshm_zone[i].name.len)\n                == 0)\n            {\n                goto live_shm_zone;\n            }\n        }\n        ngx_shm_free(&oshm_zone[i].shm);\n    live_shm_zone:\n        continue;\n    }\nold_shm_zone_done:\n    ls = old_cycle->listening.elts;\n    for (i = 0; i < old_cycle->listening.nelts; i++) {\n        if (ls[i].remain) {\n            continue;\n        }\n        if (ngx_close_socket(ls[i].fd) == -1) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,\n                          ngx_close_socket_n " listening socket on %V failed",\n                          &ls[i].addr_text);\n        }\n    }\n    part = &old_cycle->open_files.part;\n    file = part->elts;\n    for (i = 0;   ; i++) {\n        if (i >= part->nelts) {\n            if (part->next == NULL) {\n                break;\n            }\n            part = part->next;\n            file = part->elts;\n            i = 0;\n        }\n        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr_fileno) {\n            continue;\n        }\n        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,\n                          ngx_close_file_n " \\"%s\\" failed",\n                          file[i].name.data);\n        }\n    }\n    ngx_destroy_pool(conf.temp_pool);\n    if (ngx_process == NGX_PROCESS_MASTER || ngx_is_init_cycle(old_cycle)) {\n        env = environ;\n        environ = senv;\n        ngx_destroy_pool(old_cycle->pool);\n        cycle->old_cycle = NULL;\n        environ = env;\n        return cycle;\n    }\n    if (ngx_temp_pool == NULL) {\n        ngx_temp_pool = ngx_create_pool(128, cycle->log);\n        if (ngx_temp_pool == NULL) {\n            ngx_log_error(NGX_LOG_EMERG, cycle->log, 0,\n                          "can not create ngx_temp_pool");\n            exit(1);\n        }\n        n = 10;\n        ngx_old_cycles.elts = ngx_pcalloc(ngx_temp_pool,\n                                          n * sizeof(ngx_cycle_t *));\n        if (ngx_old_cycles.elts == NULL) {\n            exit(1);\n        }\n        ngx_old_cycles.nelts = 0;\n        ngx_old_cycles.size = sizeof(ngx_cycle_t *);\n        ngx_old_cycles.nalloc = n;\n        ngx_old_cycles.pool = ngx_temp_pool;\n        ngx_cleaner_event.handler = ngx_clean_old_cycles;\n        ngx_cleaner_event.log = cycle->log;\n        ngx_cleaner_event.data = &dumb;\n        dumb.fd = (ngx_socket_t) -1;\n    }\n    ngx_temp_pool->log = cycle->log;\n    old = ngx_array_push(&ngx_old_cycles);\n    if (old == NULL) {\n        exit(1);\n    }\n    *old = old_cycle;\n    if (!ngx_cleaner_event.timer_set) {\n        ngx_add_timer(&ngx_cleaner_event, 30000);\n        ngx_cleaner_event.timer_set = 1;\n    }\n    return cycle;\nfailed:\n    if (!ngx_is_init_cycle(old_cycle)) {\n        old_ccf = (ngx_core_conf_t *) ngx_get_conf(old_cycle->conf_ctx,\n                                                   ngx_core_module);\n        if (old_ccf->environment) {\n            environ = old_ccf->environment;\n        }\n    }\n    part = &cycle->open_files.part;\n    file = part->elts;\n    for (i = 0;   ; i++) {\n        if (i >= part->nelts) {\n            if (part->next == NULL) {\n                break;\n            }\n            part = part->next;\n            file = part->elts;\n            i = 0;\n        }\n        if (file[i].fd == NGX_INVALID_FILE || file[i].fd == ngx_stderr_fileno) {\n            continue;\n        }\n        if (ngx_close_file(file[i].fd) == NGX_FILE_ERROR) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_errno,\n                          ngx_close_file_n " \\"%s\\" failed",\n                          file[i].name.data);\n        }\n    }\n    if (ngx_test_config) {\n        ngx_destroy_cycle_pools(&conf);\n        return NULL;\n    }\n    ls = cycle->listening.elts;\n    for (i = 0; i < cycle->listening.nelts; i++) {\n        if (ls[i].fd == -1 || !ls[i].open) {\n            continue;\n        }\n        if (ngx_close_socket(ls[i].fd) == -1) {\n            ngx_log_error(NGX_LOG_EMERG, log, ngx_socket_errno,\n                          ngx_close_socket_n " %V failed",\n                          &ls[i].addr_text);\n        }\n    }\n    ngx_destroy_cycle_pools(&conf);\n    return NULL;\n}', 'ngx_pool_t *\nngx_create_pool(size_t size, ngx_log_t *log)\n{\n    ngx_pool_t  *p;\n    p = ngx_alloc(size, log);\n    if (p == NULL) {\n        return NULL;\n    }\n    p->d.last = (u_char *) p + sizeof(ngx_pool_t);\n    p->d.end = (u_char *) p + size;\n    p->d.next = NULL;\n    size = size - sizeof(ngx_pool_t);\n    p->max = (size < NGX_MAX_ALLOC_FROM_POOL) ? size : NGX_MAX_ALLOC_FROM_POOL;\n    p->current = p;\n    p->chain = NULL;\n    p->large = NULL;\n    p->cleanup = NULL;\n    p->log = log;\n    return p;\n}']