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ZendAccelerator.c
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/*
+----------------------------------------------------------------------+
| Zend Optimizer+ |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2013 The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| [email protected] so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <[email protected]> |
| Zeev Suraski <[email protected]> |
| Stanislav Malyshev <[email protected]> |
| Dmitry Stogov <[email protected]> |
+----------------------------------------------------------------------+
*/
#include "main/php.h"
#include "main/php_globals.h"
#include "zend.h"
#include "zend_extensions.h"
#include "zend_compile.h"
#include "ZendAccelerator.h"
#include "zend_persist.h"
#include "zend_shared_alloc.h"
#include "zend_accelerator_module.h"
#include "zend_accelerator_blacklist.h"
#include "zend_list.h"
#include "zend_execute.h"
#include "main/SAPI.h"
#include "main/php_streams.h"
#include "main/php_open_temporary_file.h"
#include "zend_API.h"
#include "zend_ini.h"
#include "TSRM/tsrm_virtual_cwd.h"
#include "zend_accelerator_util_funcs.h"
#include "zend_accelerator_hash.h"
#ifndef ZEND_WIN32
#include <netdb.h>
#endif
#ifdef ZEND_WIN32
typedef int uid_t;
typedef int gid_t;
#include <io.h>
#endif
#ifndef ZEND_WIN32
# include <sys/time.h>
#else
# include <process.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <fcntl.h>
#include <signal.h>
#include <time.h>
#ifndef ZEND_WIN32
# include <sys/types.h>
# include <sys/ipc.h>
#endif
#include <sys/stat.h>
#include <errno.h>
#define MIN_FREE_MEMORY 64*1024
#define SHM_PROTECT() \
do { \
if (ZCG(accel_directives).protect_memory) { \
zend_accel_shared_protect(1 TSRMLS_CC); \
} \
} while (0)
#define SHM_UNPROTECT() \
do { \
if (ZCG(accel_directives).protect_memory) { \
zend_accel_shared_protect(0 TSRMLS_CC); \
} \
} while (0)
ZEND_EXTENSION();
#ifndef ZTS
zend_accel_globals accel_globals;
#else
int accel_globals_id;
#endif
/* Points to the structure shared across all PHP processes */
zend_accel_shared_globals *accel_shared_globals = NULL;
/* true globals, no need for thread safety */
static char *zps_failure_reason = NULL;
char *zps_api_failure_reason = NULL;
static zend_op_array *(*accelerator_orig_compile_file)(zend_file_handle *file_handle, int type TSRMLS_DC);
static int (*accelerator_orig_zend_stream_open_function)(const char *filename, zend_file_handle *handle TSRMLS_DC);
#if ZEND_EXTENSION_API_NO >= PHP_5_3_X_API_NO
static char *(*accelerator_orig_zend_resolve_path)(const char *filename, int filename_len TSRMLS_DC);
#endif
static void (*orig_chdir)(INTERNAL_FUNCTION_PARAMETERS) = NULL;
static ZEND_INI_MH((*orig_include_path_on_modify)) = NULL;
#ifdef ZEND_WIN32
# define INCREMENT(v) InterlockedIncrement(&ZCSG(v))
# define DECREMENT(v) InterlockedDecrement(&ZCSG(v))
# define LOCKVAL(v) (ZCSG(v))
#endif
#ifdef ZEND_WIN32
static time_t zend_accel_get_time(void)
{
FILETIME now;
GetSystemTimeAsFileTime(&now);
return (time_t) ((((((__int64)now.dwHighDateTime) << 32)|now.dwLowDateTime) - 116444736000000000L)/10000000);
}
#else
# define zend_accel_get_time() time(NULL)
#endif
static inline int is_stream_path(const char *filename)
{
const char *p;
for (p = filename; isalnum((int)*p) || *p == '+' || *p == '-' || *p == '.'; p++);
return ((*p == ':') && (p - filename > 1) && (p[1] == '/') && (p[2] == '/'));
}
/* O+ overrides PHP chdir() function and remembers the current working directory
* in ZCG(cwd) and ZCG(cwd_len). Later accel_getcwd() can use stored value and
* avoid getcwd() call.
*/
static ZEND_FUNCTION(accel_chdir)
{
char cwd[MAXPATHLEN];
orig_chdir(INTERNAL_FUNCTION_PARAM_PASSTHRU);
if (VCWD_GETCWD(cwd, MAXPATHLEN)) {
ZCG(cwd_len) = strlen(cwd);
ZCG(cwd) = estrndup(cwd, ZCG(cwd_len));
} else {
if (ZCG(cwd)) {
efree(ZCG(cwd));
ZCG(cwd) = NULL;
}
}
}
static inline char* accel_getcwd(int *cwd_len TSRMLS_DC)
{
if (ZCG(cwd)) {
*cwd_len = ZCG(cwd_len);
return ZCG(cwd);
} else {
char cwd[MAXPATHLEN + 1];
if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
return NULL;
}
*cwd_len = ZCG(cwd_len) = strlen(cwd);
ZCG(cwd) = estrndup(cwd, ZCG(cwd_len));
return ZCG(cwd);
}
}
/* O+ traks changes of "include_path" directive. It stores all the requested
* values in ZCG(include_paths) shared hash table, current value in
* ZCG(include_path)/ZCG(include_path_len) and one letter "path key" in
* ZCG(include_path_key).
*/
static ZEND_INI_MH(accel_include_path_on_modify)
{
int ret = orig_include_path_on_modify(entry, new_value, new_value_length, mh_arg1, mh_arg2, mh_arg3, stage TSRMLS_CC);
ZCG(include_path_key) = NULL;
if (ret == SUCCESS) {
ZCG(include_path) = new_value;
if (ZCG(include_path) && *ZCG(include_path)) {
ZCG(include_path_len) = new_value_length;
if (ZCG(startup_ok) &&
(ZCG(counted) || ZCSG(accelerator_enabled)) &&
!zend_accel_hash_is_full(&ZCSG(include_paths))) {
SHM_UNPROTECT();
zend_shared_alloc_lock(TSRMLS_C);
ZCG(include_path_key) = zend_accel_hash_find(&ZCSG(include_paths), ZCG(include_path), ZCG(include_path_len) + 1);
if (!ZCG(include_path_key) &&
!zend_accel_hash_is_full(&ZCSG(include_paths))) {
char *key;
key = zend_shared_alloc(ZCG(include_path_len) + 2);
if (key) {
memcpy(key, ZCG(include_path), ZCG(include_path_len) + 1);
key[ZCG(include_path_len) + 1] = 'A' + ZCSG(include_paths).num_entries;
ZCG(include_path_key) = key + ZCG(include_path_len) + 1;
zend_accel_hash_update(&ZCSG(include_paths), key, ZCG(include_path_len) + 1, 0, ZCG(include_path_key));
}
}
zend_shared_alloc_unlock(TSRMLS_C);
SHM_PROTECT();
} else {
ZCG(include_path_check) = 1;
}
} else {
ZCG(include_path) = "";
ZCG(include_path_len) = 0;
}
}
return ret;
}
#if ZEND_EXTENSION_API_NO > PHP_5_3_X_API_NO
/* Interned strings support */
static char *orig_interned_strings_start;
static char *orig_interned_strings_end;
static const char *(*orig_new_interned_string)(const char *str, int len, int free_src TSRMLS_DC);
static void (*orig_interned_strings_snapshot)(TSRMLS_D);
static void (*orig_interned_strings_restore)(TSRMLS_D);
/* O+ disables creation of interned strings by regular PHP compiler, instead,
* it creates interned strings in shared memory when saves a script.
* Such interned strings are shatred across all PHP processes
*/
static const char *accel_new_interned_string_for_php(const char *str, int len, int free_src TSRMLS_DC)
{
return str;
}
static void accel_interned_strings_snapshot_for_php(TSRMLS_D)
{
}
static void accel_interned_strings_restore_for_php(TSRMLS_D)
{
}
#ifndef ZTS
static void accel_interned_strings_restore_state(TSRMLS_D)
{
unsigned int i;
for (i = 0; i < ZCSG(interned_strings).nTableSize; i++) {
ZCSG(interned_strings).arBuckets[i] = ZCSG(interned_strings_saved_state).arBuckets[i];
if (ZCSG(interned_strings).arBuckets[i]) {
ZCSG(interned_strings).arBuckets[i]->pLast = NULL;
}
}
ZCSG(interned_strings).pListHead = ZCSG(interned_strings_saved_state).pListHead;
ZCSG(interned_strings).pListTail = ZCSG(interned_strings_saved_state).pListTail;
if (ZCSG(interned_strings).pListHead) {
ZCSG(interned_strings).pListHead->pListLast = NULL;
}
if (ZCSG(interned_strings).pListTail) {
ZCSG(interned_strings).pListTail->pListNext = NULL;
}
ZCSG(interned_strings_top) = ZCSG(interned_strings_saved_state).top;
}
static void accel_interned_strings_save_state(TSRMLS_D)
{
ZCSG(interned_strings_saved_state).arBuckets = (Bucket**)zend_shared_alloc(ZCSG(interned_strings).nTableSize * sizeof(Bucket *));
if (!ZCSG(interned_strings_saved_state).arBuckets) {
zend_accel_error(ACCEL_LOG_FATAL, "Insufficient shared memory!");
}
memcpy(ZCSG(interned_strings_saved_state).arBuckets, ZCSG(interned_strings).arBuckets, ZCSG(interned_strings).nTableSize * sizeof(Bucket *));
ZCSG(interned_strings_saved_state).pListHead = ZCSG(interned_strings).pListHead;
ZCSG(interned_strings_saved_state).pListTail = ZCSG(interned_strings).pListTail;
ZCSG(interned_strings_saved_state).top = ZCSG(interned_strings_top);
}
#endif
const char *accel_new_interned_string(const char *arKey, int nKeyLength, int free_src TSRMLS_DC)
{
/* for now interned strings are supported only for non-ZTS build */
#ifndef ZTS
ulong h;
uint nIndex;
Bucket *p;
if (arKey >= ZCSG(interned_strings_start) && arKey < ZCSG(interned_strings_end)) {
/* this is already an interned string */
return arKey;
}
h = zend_inline_hash_func(arKey, nKeyLength);
nIndex = h & ZCSG(interned_strings).nTableMask;
/* check for existing interned string */
p = ZCSG(interned_strings).arBuckets[nIndex];
while (p != NULL) {
if ((p->h == h) && (p->nKeyLength == (uint)nKeyLength)) {
if (!memcmp(p->arKey, arKey, nKeyLength)) {
if (free_src) {
efree((char*)arKey);
}
return p->arKey;
}
}
p = p->pNext;
}
if (ZCSG(interned_strings_top) + ZEND_MM_ALIGNED_SIZE(sizeof(Bucket) + nKeyLength) >=
ZCSG(interned_strings_end)) {
/* no memory, return the same non-interned string */
return arKey;
}
/* create new interning string in shared interned strings buffer */
p = (Bucket *) ZCSG(interned_strings_top);
ZCSG(interned_strings_top) += ZEND_MM_ALIGNED_SIZE(sizeof(Bucket) + nKeyLength);
p->arKey = (char*)(p+1);
memcpy((char*)p->arKey, arKey, nKeyLength);
p->nKeyLength = nKeyLength;
p->h = h;
p->pData = &p->pDataPtr;
p->pDataPtr = p;
p->pNext = ZCSG(interned_strings).arBuckets[nIndex];
p->pLast = NULL;
if (p->pNext) {
p->pNext->pLast = p;
}
ZCSG(interned_strings).arBuckets[nIndex] = p;
p->pListLast = ZCSG(interned_strings).pListTail;
ZCSG(interned_strings).pListTail = p;
p->pListNext = NULL;
if (p->pListLast != NULL) {
p->pListLast->pListNext = p;
}
if (!ZCSG(interned_strings).pListHead) {
ZCSG(interned_strings).pListHead = p;
}
ZCSG(interned_strings).nNumOfElements++;
if (free_src) {
efree((char*)arKey);
}
return p->arKey;
#else
return arKey;
#endif
}
#ifndef ZTS
/* Copy PHP interned strings from PHP process memory into the shared memory */
static void accel_use_shm_interned_strings(TSRMLS_D)
{
Bucket *p, *q;
/* function table hash keys */
p = CG(function_table)->pListHead;
while (p) {
if (p->nKeyLength) {
p->arKey = accel_new_interned_string(p->arKey, p->nKeyLength, 0 TSRMLS_CC);
}
p = p->pListNext;
}
/* class table hash keys, class names, properties, methods, constants, etc */
p = CG(class_table)->pListHead;
while (p) {
zend_class_entry *ce = (zend_class_entry*)(p->pDataPtr);
if (p->nKeyLength) {
p->arKey = accel_new_interned_string(p->arKey, p->nKeyLength, 0 TSRMLS_CC);
}
if (ce->name) {
ce->name = accel_new_interned_string(ce->name, ce->name_length+1, 0 TSRMLS_CC);
}
q = ce->properties_info.pListHead;
while (q) {
zend_property_info *info = (zend_property_info*)(q->pData);
if (q->nKeyLength) {
q->arKey = accel_new_interned_string(q->arKey, q->nKeyLength, 0 TSRMLS_CC);
}
if (info->name) {
info->name = accel_new_interned_string(info->name, info->name_length+1, 0 TSRMLS_CC);
}
q = q->pListNext;
}
q = ce->function_table.pListHead;
while (q) {
if (q->nKeyLength) {
q->arKey = accel_new_interned_string(q->arKey, q->nKeyLength, 0 TSRMLS_CC);
}
q = q->pListNext;
}
q = ce->constants_table.pListHead;
while (q) {
if (q->nKeyLength) {
q->arKey = accel_new_interned_string(q->arKey, q->nKeyLength, 0 TSRMLS_CC);
}
q = q->pListNext;
}
p = p->pListNext;
}
/* constant hash keys */
p = EG(zend_constants)->pListHead;
while (p) {
if (p->nKeyLength) {
p->arKey = accel_new_interned_string(p->arKey, p->nKeyLength, 0 TSRMLS_CC);
}
p = p->pListNext;
}
/* auto globals hash keys and names */
p = CG(auto_globals)->pListHead;
while (p) {
zend_auto_global *auto_global = (zend_auto_global*)p->pData;
auto_global->name = accel_new_interned_string(auto_global->name, auto_global->name_len + 1, 0 TSRMLS_CC);
if (p->nKeyLength) {
p->arKey = accel_new_interned_string(p->arKey, p->nKeyLength, 0 TSRMLS_CC);
}
p = p->pListNext;
}
}
#endif
#endif
static inline void accel_restart_enter(TSRMLS_D)
{
#ifdef ZEND_WIN32
INCREMENT(restart_in);
#else
static const FLOCK_STRUCTURE(restart_in_progress, F_WRLCK, SEEK_SET, 2, 1);
if (fcntl(lock_file, F_SETLK, &restart_in_progress)==-1) {
zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(+1): %s (%d)", strerror(errno), errno);
}
#endif
ZCSG(restart_in_progress) = 1;
}
static inline void accel_restart_leave(TSRMLS_D)
{
ZCSG(restart_in_progress) = 0;
#ifdef ZEND_WIN32
DECREMENT(restart_in);
#else
static const FLOCK_STRUCTURE(restart_finished, F_UNLCK, SEEK_SET, 2, 1);
if (fcntl(lock_file, F_SETLK, &restart_finished)==-1) {
zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(-1): %s (%d)", strerror(errno), errno);
}
#endif
}
static inline int accel_restart_is_active(TSRMLS_D)
{
if(ZCSG(restart_in_progress)) {
#ifndef ZEND_WIN32
FLOCK_STRUCTURE(restart_check, F_WRLCK, SEEK_SET, 2, 1);
if (fcntl(lock_file, F_GETLK, &restart_check) == -1) {
zend_accel_error(ACCEL_LOG_DEBUG, "RestartC: %s (%d)", strerror(errno), errno);
return FAILURE;
}
if (restart_check.l_type == F_UNLCK) {
ZCSG(restart_in_progress) = 0;
return 0;
} else {
return 1;
}
#else
return LOCKVAL(restart_in) != 0;
#endif
}
return 0;
}
/* Creates a read lock for SHM access */
static inline void accel_activate_add(TSRMLS_D)
{
#ifdef ZEND_WIN32
INCREMENT(mem_usage);
#else
static const FLOCK_STRUCTURE(mem_usage_lock, F_RDLCK, SEEK_SET, 1, 1);
if (fcntl(lock_file, F_SETLK, &mem_usage_lock)==-1) {
zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(+1): %s (%d)", strerror(errno), errno);
}
#endif
}
/* Releases a lock for SHM access */
static inline void accel_deactivate_sub(TSRMLS_D)
{
#ifdef ZEND_WIN32
if (ZCG(counted)) {
DECREMENT(mem_usage);
ZCG(counted) = 0;
}
#else
static const FLOCK_STRUCTURE(mem_usage_unlock, F_UNLCK, SEEK_SET, 1, 1);
if (fcntl(lock_file, F_SETLK, &mem_usage_unlock)==-1) {
zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC(-1): %s (%d)", strerror(errno), errno);
}
#endif
}
static inline void accel_unlock_all(TSRMLS_D)
{
#ifdef ZEND_WIN32
accel_deactivate_sub(TSRMLS_C);
#else
static const FLOCK_STRUCTURE(mem_usage_unlock_all, F_UNLCK, SEEK_SET, 0, 0);
if (fcntl(lock_file, F_SETLK, &mem_usage_unlock_all)==-1) {
zend_accel_error(ACCEL_LOG_DEBUG, "UnlockAll: %s (%d)", strerror(errno), errno);
}
#endif
}
#ifndef ZEND_WIN32
static inline void kill_all_lockers(struct flock *mem_usage_check)
{
int tries = 10;
/* so that other process won't try to force while we are busy cleaning up */
ZCSG(force_restart_time) = 0;
while (mem_usage_check->l_pid > 0) {
while (tries--) {
zend_accel_error(ACCEL_LOG_INFO, "Killed locker %d", mem_usage_check->l_pid);
if (kill(mem_usage_check->l_pid, SIGKILL)) {
break;
}
/* give it a chance to die */
usleep(20000);
if (kill(mem_usage_check->l_pid, 0)) {
/* can't kill it */
break;
}
usleep(10000);
}
if (!tries) {
zend_accel_error(ACCEL_LOG_INFO, "Can't kill %d after 20 tries!", mem_usage_check->l_pid);
ZCSG(force_restart_time) = time(NULL); /* restore forced restart request */
}
mem_usage_check->l_type = F_WRLCK;
mem_usage_check->l_whence = SEEK_SET;
mem_usage_check->l_start = 1;
mem_usage_check->l_len = 1;
mem_usage_check->l_pid = -1;
if (fcntl(lock_file, F_GETLK, mem_usage_check) == -1) {
zend_accel_error(ACCEL_LOG_DEBUG, "KLockers: %s (%d)", strerror(errno), errno);
break;
}
if (mem_usage_check->l_type == F_UNLCK || mem_usage_check->l_pid <= 0) {
break;
}
}
}
#endif
static inline int accel_is_inactive(TSRMLS_D)
{
#ifdef ZEND_WIN32
if (LOCKVAL(mem_usage) == 0) {
return SUCCESS;
}
#else
FLOCK_STRUCTURE(mem_usage_check, F_WRLCK, SEEK_SET, 1, 1);
mem_usage_check.l_pid = -1;
if (fcntl(lock_file, F_GETLK, &mem_usage_check) == -1) {
zend_accel_error(ACCEL_LOG_DEBUG, "UpdateC: %s (%d)", strerror(errno), errno);
return FAILURE;
}
if (mem_usage_check.l_type == F_UNLCK) {
return SUCCESS;
}
if (ZCG(accel_directives).force_restart_timeout
&& ZCSG(force_restart_time)
&& time(NULL)>=ZCSG(force_restart_time)) {
zend_accel_error(ACCEL_LOG_WARNING, "Forced restart at %d (after %d seconds), locked by %d", time(NULL), ZCG(accel_directives).force_restart_timeout, mem_usage_check.l_pid);
kill_all_lockers(&mem_usage_check);
return FAILURE; /* next request should be able to restart it */
}
#endif
return FAILURE;
}
static int zend_get_stream_timestamp(const char *filename, struct stat *statbuf TSRMLS_DC)
{
php_stream_wrapper *wrapper;
php_stream_statbuf stream_statbuf;
if(!filename) {
return FAILURE;
}
wrapper = php_stream_locate_url_wrapper(filename, NULL, STREAM_LOCATE_WRAPPERS_ONLY TSRMLS_CC);
if(!wrapper) {
return FAILURE;
}
if(!wrapper->wops || !wrapper->wops->url_stat) {
statbuf->st_mtime = 1;
return SUCCESS; /* anything other than 0 is considered to be a valid timestamp */
}
if(wrapper->wops->url_stat(wrapper, (char*)filename, PHP_STREAM_URL_STAT_QUIET, &stream_statbuf, NULL TSRMLS_CC) != 0) {
return FAILURE;
}
*statbuf = stream_statbuf.sb;
return SUCCESS;
}
#if ZEND_WIN32
static accel_time_t zend_get_file_handle_timestamp_win(zend_file_handle *file_handle)
{
static unsigned __int64 utc_base = 0;
static FILETIME utc_base_ft;
WIN32_FILE_ATTRIBUTE_DATA fdata;
if(!file_handle->opened_path) {
return 0;
}
if (!utc_base) {
SYSTEMTIME st;
st.wYear = 1970;
st.wMonth = 1;
st.wDay = 1;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;
st.wMilliseconds = 0;
SystemTimeToFileTime (&st, &utc_base_ft);
utc_base = (((unsigned __int64)utc_base_ft.dwHighDateTime) << 32) + utc_base_ft.dwLowDateTime;
}
if(GetFileAttributesEx(file_handle->opened_path, GetFileExInfoStandard, &fdata) != 0) {
unsigned __int64 ftime;
if (CompareFileTime (&fdata.ftLastWriteTime, &utc_base_ft) < 0)
return 0;
ftime = (((unsigned __int64)fdata.ftLastWriteTime.dwHighDateTime) << 32) + fdata.ftLastWriteTime.dwLowDateTime - utc_base;
ftime /= 10000000L;
return (accel_time_t)ftime;
}
return 0;
}
#endif
static accel_time_t zend_get_file_handle_timestamp(zend_file_handle *file_handle TSRMLS_DC)
{
struct stat statbuf;
#ifdef ZEND_WIN32
accel_time_t res;
res = zend_get_file_handle_timestamp_win(file_handle);
if(res) {
return res;
}
#endif
switch (file_handle->type) {
case ZEND_HANDLE_FD:
if (fstat(file_handle->handle.fd, &statbuf)==-1) {
return 0;
}
break;
case ZEND_HANDLE_FP:
if (fstat(fileno(file_handle->handle.fp), &statbuf) == -1) {
if (zend_get_stream_timestamp(file_handle->filename, &statbuf TSRMLS_CC) != SUCCESS) {
return 0;
}
}
break;
case ZEND_HANDLE_FILENAME:
#if ZEND_EXTENSION_API_NO >= PHP_5_3_X_API_NO
case ZEND_HANDLE_MAPPED:
#endif
{
char *file_path = file_handle->opened_path;
if(file_path) {
if (is_stream_path(file_path)) {
if (zend_get_stream_timestamp(file_path, &statbuf TSRMLS_CC) == SUCCESS) {
break;
}
}
if (VCWD_STAT(file_path, &statbuf) !=-1) {
break;
}
}
if (zend_get_stream_timestamp(file_handle->filename, &statbuf TSRMLS_CC) != SUCCESS) {
return 0;
}
break;
}
case ZEND_HANDLE_STREAM:
{
php_stream *stream = (php_stream *)file_handle->handle.stream.handle;
php_stream_statbuf sb;
int er = EG(error_reporting);
EG(error_reporting) = 0;
if (!stream ||
!stream->ops ||
!stream->ops->stat ||
stream->ops->stat(stream, &sb TSRMLS_CC) != 0) {
EG(error_reporting) = er;
return 0;
}
EG(error_reporting) = er;
statbuf = sb.sb;
}
break;
default:
return 0;
}
return statbuf.st_mtime;
}
static inline int do_validate_timestamps(zend_persistent_script *persistent_script, zend_file_handle *file_handle TSRMLS_DC)
{
zend_file_handle ps_handle;
/** check that the persistant script is indeed the same file we cached
* (if part of the path is a symlink than it possible that the user will change it)
* See bug #15140
*/
if (file_handle->opened_path) {
if (strcmp(persistent_script->full_path,file_handle->opened_path)!=0) {
return FAILURE;
}
} else {
char actualpath [MAXPATHLEN+1];
char *full_path_ptr;
full_path_ptr = VCWD_REALPATH(file_handle->filename, actualpath);
if (full_path_ptr && strcmp(persistent_script->full_path,full_path_ptr)!=0) {
return FAILURE;
}
}
if (persistent_script->timestamp == 0) {
return FAILURE;
}
if (zend_get_file_handle_timestamp(file_handle TSRMLS_CC) == persistent_script->timestamp) {
return SUCCESS;
}
ps_handle.type = ZEND_HANDLE_FILENAME;
ps_handle.filename = persistent_script->full_path;
ps_handle.opened_path = persistent_script->full_path;
if (zend_get_file_handle_timestamp(&ps_handle TSRMLS_CC) == persistent_script->timestamp) {
return SUCCESS;
}
return FAILURE;
}
static void zend_accel_schedule_restart_if_necessary(TSRMLS_D)
{
if ((((double) ZSMMG(wasted_shared_memory)) / ZCG(accel_directives).memory_consumption) >= ZCG(accel_directives).max_wasted_percentage) {
zend_accel_schedule_restart(TSRMLS_C);
}
}
static inline int validate_timestamp_and_record(zend_persistent_script *persistent_script, zend_file_handle *file_handle TSRMLS_DC)
{
if (persistent_script->dynamic_members.revalidate >= ZCSG(revalidate_at)) {
return SUCCESS;
} else if (do_validate_timestamps(persistent_script, file_handle TSRMLS_CC)==FAILURE) {
return FAILURE;
} else {
persistent_script->dynamic_members.revalidate = ZCSG(revalidate_at);
return SUCCESS;
}
}
static unsigned int zend_accel_script_checksum(zend_persistent_script *persistent_script)
{
signed char *mem = (signed char*)persistent_script->mem;
size_t size = persistent_script->size;
size_t persistent_script_check_block_size = ((char *)&(persistent_script->dynamic_members)) - (char *)persistent_script;
unsigned int checksum = ADLER32_INIT;
if (mem < (signed char*)persistent_script) {
checksum = zend_adler32(checksum, mem, (signed char*)persistent_script - mem);
size -= (signed char*)persistent_script - mem;
mem += (signed char*)persistent_script - mem;
}
zend_adler32(checksum, mem, persistent_script_check_block_size);
mem += sizeof(*persistent_script);
size -= sizeof(*persistent_script);
if (size > 0) {
checksum = zend_adler32(checksum, mem, size);
}
return checksum;
}
/* Instead of resolving full real path name each time we need to identify file,
* we create a key that consist from requested file name, current working
* directory, current include_path, etc */
char *accel_make_persistent_key_ex(zend_file_handle *file_handle, int path_length, int *key_len TSRMLS_DC)
{
int key_length;
/* CWD and include_path don't matter for absolute file names and streams */
if (ZCG(accel_directives).use_cwd &&
!IS_ABSOLUTE_PATH(file_handle->filename, path_length) &&
!is_stream_path(file_handle->filename)) {
char *include_path=NULL;
int include_path_len=0;
const char *parent_script = NULL;
int parent_script_len=0;
int cur_len=0;
int cwd_len;
char *cwd;
if ((cwd = accel_getcwd(&cwd_len TSRMLS_CC)) == NULL) {
/* we don't handle this well for now. */
zend_accel_error(ACCEL_LOG_INFO, "getcwd() failed for '%s' (%d), please try to set zend_optimizerplus.use_cwd to 0 in ini file", file_handle->filename, errno);
if(file_handle->opened_path) {
cwd = file_handle->opened_path;
cwd_len = strlen(cwd);
} else {
ZCG(key_len) = 0;
return NULL;
}
}
if (ZCG(include_path_key)) {
include_path = ZCG(include_path_key);
include_path_len = 1;
} else {
include_path = ZCG(include_path);
include_path_len = ZCG(include_path_len);
if (ZCG(include_path_check) &&
ZCG(startup_ok) &&
(ZCG(counted) || ZCSG(accelerator_enabled)) &&
!zend_accel_hash_is_full(&ZCSG(include_paths))) {
SHM_UNPROTECT();
zend_shared_alloc_lock(TSRMLS_C);
ZCG(include_path_key) = zend_accel_hash_find(&ZCSG(include_paths), ZCG(include_path), ZCG(include_path_len) + 1);
if (ZCG(include_path_key)) {
include_path = ZCG(include_path_key);
include_path_len = 1;
} else if (!zend_accel_hash_is_full(&ZCSG(include_paths))) {
char *key;
key = zend_shared_alloc(ZCG(include_path_len) + 2);
if (key) {
memcpy(key, ZCG(include_path), ZCG(include_path_len) + 1);
key[ZCG(include_path_len) + 1] = 'A' + ZCSG(include_paths).num_entries;
ZCG(include_path_key) = key + ZCG(include_path_len) + 1;
zend_accel_hash_update(&ZCSG(include_paths), key, ZCG(include_path_len) + 1, 0, ZCG(include_path_key));
include_path = ZCG(include_path_key);
include_path_len = 1;
}
}
zend_shared_alloc_unlock(TSRMLS_C);
SHM_PROTECT();
}
}
/* Here we add to the key the parent script directory,
since fopen_wrappers from version 4.0.7 use current script's path
in include path too.
*/
if (EG(in_execution) &&
(parent_script = zend_get_executed_filename(TSRMLS_C)) != NULL &&
parent_script[0] != '[') {
parent_script_len = strlen(parent_script);
while ((--parent_script_len > 0) && !IS_SLASH(parent_script[parent_script_len]));
}
/* Calculate key length */
key_length = cwd_len+path_length+include_path_len+2;
if (parent_script_len) {
key_length += parent_script_len+1;
}
/* Generate key
* Note - the include_path must be the last element in the key,
* since in itself, it may include colons (which we use to separate
* different components of the key)
*/
if ((size_t)key_length >= sizeof(ZCG(key))) {
ZCG(key_len) = 0;
return NULL;
}
memcpy(ZCG(key), cwd, cwd_len);
ZCG(key)[cwd_len] = ':';
memcpy(ZCG(key)+cwd_len+1, file_handle->filename, path_length);
ZCG(key)[cwd_len+1+path_length] = ':';
cur_len = cwd_len+1+path_length+1;
if (parent_script_len) {
memcpy(ZCG(key)+cur_len, parent_script, parent_script_len);
cur_len += parent_script_len;
ZCG(key)[cur_len] = ':';
cur_len++;
}
memcpy(ZCG(key)+cur_len, include_path, include_path_len);
ZCG(key)[key_length] = '\0';
} else {
/* not use_cwd */
key_length = path_length;
if ((size_t)key_length >= sizeof(ZCG(key))) {
ZCG(key_len) = 0;
return NULL;
}
memcpy(ZCG(key), file_handle->filename, key_length+1);
}
*key_len = ZCG(key_len) = key_length;
return ZCG(key);
}
static inline char *accel_make_persistent_key(zend_file_handle *file_handle, int *key_len TSRMLS_DC)
{
return accel_make_persistent_key_ex(file_handle, strlen(file_handle->filename), key_len TSRMLS_CC);
}
/* Adds another key for existing cached script */
static void zend_accel_add_key(char *key, unsigned int key_length, zend_accel_hash_entry *bucket TSRMLS_DC)
{
if (!zend_accel_hash_find(&ZCSG(hash), key, key_length+1)) {
if (zend_accel_hash_is_full(&ZCSG(hash))) {
zend_accel_error(ACCEL_LOG_DEBUG,"No more entries in hash table!");
ZSMMG(memory_exhausted) = 1;
} else {
char *new_key = zend_shared_alloc(key_length+1);
if (new_key) {
memcpy(new_key, key, key_length+1);
zend_accel_hash_update(&ZCSG(hash), new_key, key_length+1, 1, bucket);
} else {
zend_accel_error(ACCEL_LOG_DEBUG,"No more memory!");
ZSMMG(memory_exhausted) = 1;
}
}
}
}
static zend_persistent_script *cache_script_in_shared_memory(zend_persistent_script *new_persistent_script, char *key, unsigned int key_length, int *from_shared_memory TSRMLS_DC)
{
zend_accel_hash_entry *bucket;
uint memory_used;
/* Check if script may be stored in shared memory */
if(!zend_accel_script_persistable(new_persistent_script)) {
return new_persistent_script;
}