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ZendAccelerator.c
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/*
+----------------------------------------------------------------------+
| Zend OPcache |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2015 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 "zend_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 SHM_PROTECT() \
do { \
if (ZCG(accel_directives).protect_memory) { \
zend_accel_shared_protect(1); \
} \
} while (0)
#define SHM_UNPROTECT() \
do { \
if (ZCG(accel_directives).protect_memory) { \
zend_accel_shared_protect(0); \
} \
} while (0)
ZEND_EXTENSION();
#ifndef ZTS
zend_accel_globals accel_globals;
#else
int accel_globals_id;
#if defined(COMPILE_DL_OPCACHE)
ZEND_TSRMLS_CACHE_DEFINE();
#endif
#endif
/* Points to the structure shared across all PHP processes */
zend_accel_shared_globals *accel_shared_globals = NULL;
/* true globals, no need for thread safety */
zend_bool accel_startup_ok = 0;
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);
static int (*accelerator_orig_zend_stream_open_function)(const char *filename, zend_file_handle *handle );
static zend_string *(*accelerator_orig_zend_resolve_path)(const char *filename, int filename_len);
static void (*orig_chdir)(INTERNAL_FUNCTION_PARAMETERS) = NULL;
static ZEND_INI_MH((*orig_include_path_on_modify)) = NULL;
#ifdef ZEND_WIN32
# define INCREMENT(v) InterlockedIncrement64(&ZCSG(v))
# define DECREMENT(v) InterlockedDecrement64(&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;
(*p >= 'a' && *p <= 'z') ||
(*p >= 'A' && *p <= 'Z') ||
(*p >= '0' && *p <= '9') ||
*p == '+' || *p == '-' || *p == '.';
p++);
return ((p != filename) && (p[0] == ':') && (p[1] == '/') && (p[2] == '/'));
}
static inline int is_cacheable_stream_path(const char *filename)
{
return memcmp(filename, "file://", sizeof("file://") - 1) == 0 ||
memcmp(filename, "phar://", sizeof("phar://") - 1) == 0;
}
/* O+ overrides PHP chdir() function and remembers the current working directory
* in ZCG(cwd) and ZCG(cwd_len). Later accel_getcwd() can use stored value and
* avoid getcwd() call.
*/
static ZEND_FUNCTION(accel_chdir)
{
char cwd[MAXPATHLEN];
orig_chdir(INTERNAL_FUNCTION_PARAM_PASSTHRU);
if (VCWD_GETCWD(cwd, MAXPATHLEN)) {
if (ZCG(cwd)) {
zend_string_release(ZCG(cwd));
}
ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
} else {
if (ZCG(cwd)) {
zend_string_release(ZCG(cwd));
ZCG(cwd) = NULL;
}
}
ZCG(cwd_key_len) = 0;
ZCG(cwd_check) = 1;
}
static inline zend_string* accel_getcwd(void)
{
if (ZCG(cwd)) {
return ZCG(cwd);
} else {
char cwd[MAXPATHLEN + 1];
if (!VCWD_GETCWD(cwd, MAXPATHLEN)) {
return NULL;
}
ZCG(cwd) = zend_string_init(cwd, strlen(cwd), 0);
ZCG(cwd_key_len) = 0;
ZCG(cwd_check) = 1;
return ZCG(cwd);
}
}
void zend_accel_schedule_restart_if_necessary(zend_accel_restart_reason reason)
{
if ((((double) ZSMMG(wasted_shared_memory)) / ZCG(accel_directives).memory_consumption) >= ZCG(accel_directives).max_wasted_percentage) {
zend_accel_schedule_restart(reason);
}
}
/* O+ tracks changes of "include_path" directive. It stores all the requested
* values in ZCG(include_paths) shared hash table, current value in
* ZCG(include_path)/ZCG(include_path_len) and one letter "path key" in
* ZCG(include_path_key).
*/
static ZEND_INI_MH(accel_include_path_on_modify)
{
int ret = orig_include_path_on_modify(entry, new_value, mh_arg1, mh_arg2, mh_arg3, stage);
if (ret == SUCCESS) {
ZCG(include_path) = new_value;
ZCG(include_path_key_len) = 0;
ZCG(include_path_check) = 1;
}
return ret;
}
/* Interned strings support */
static zend_string *(*orig_new_interned_string)(zend_string *str);
static void (*orig_interned_strings_snapshot)(void);
static void (*orig_interned_strings_restore)(void);
/* O+ disables creation of interned strings by regular PHP compiler, instead,
* it creates interned strings in shared memory when saves a script.
* Such interned strings are shared across all PHP processes
*/
static zend_string *accel_new_interned_string_for_php(zend_string *str)
{
return str;
}
static void accel_interned_strings_snapshot_for_php(void)
{
}
static void accel_interned_strings_restore_for_php(void)
{
}
#ifndef ZTS
static void accel_interned_strings_restore_state(void)
{
uint idx = ZCSG(interned_strings).nNumUsed;
uint nIndex;
Bucket *p;
ZCSG(interned_strings_top) = ZCSG(interned_strings_saved_top);
while (idx > 0) {
idx--;
p = ZCSG(interned_strings).arData + idx;
if ((char*)p->key < ZCSG(interned_strings_top)) break;
ZCSG(interned_strings).nNumUsed--;
ZCSG(interned_strings).nNumOfElements--;
nIndex = p->h & ZCSG(interned_strings).nTableMask;
if (ZCSG(interned_strings).arHash[nIndex] == idx) {
ZCSG(interned_strings).arHash[nIndex] = Z_NEXT(p->val);
} else {
uint prev = ZCSG(interned_strings).arHash[nIndex];
while (Z_NEXT(ZCSG(interned_strings).arData[prev].val) != idx) {
prev = Z_NEXT(ZCSG(interned_strings).arData[prev].val);
}
Z_NEXT(ZCSG(interned_strings).arData[prev].val) = Z_NEXT(p->val);
}
}
}
static void accel_interned_strings_save_state(void)
{
ZCSG(interned_strings_saved_top) = ZCSG(interned_strings_top);
}
#endif
static zend_string *accel_find_interned_string(zend_string *str)
{
/* for now interned strings are supported only for non-ZTS build */
#ifndef ZTS
zend_ulong h;
uint nIndex;
uint idx;
Bucket *p;
if (IS_ACCEL_INTERNED(str)) {
/* this is already an interned string */
return str;
}
h = zend_string_hash_val(str);
nIndex = h & ZCSG(interned_strings).nTableMask;
/* check for existing interned string */
idx = ZCSG(interned_strings).arHash[nIndex];
while (idx != INVALID_IDX) {
p = ZCSG(interned_strings).arData + idx;
if ((p->h == h) && (p->key->len == str->len)) {
if (!memcmp(p->key->val, str->val, str->len)) {
return p->key;
}
}
idx = Z_NEXT(p->val);
}
#endif
return NULL;
}
zend_string *accel_new_interned_string(zend_string *str)
{
/* for now interned strings are supported only for non-ZTS build */
#ifndef ZTS
zend_ulong h;
uint nIndex;
uint idx;
Bucket *p;
if (IS_ACCEL_INTERNED(str)) {
/* this is already an interned string */
return str;
}
h = zend_string_hash_val(str);
nIndex = h & ZCSG(interned_strings).nTableMask;
/* check for existing interned string */
idx = ZCSG(interned_strings).arHash[nIndex];
while (idx != INVALID_IDX) {
p = ZCSG(interned_strings).arData + idx;
if ((p->h == h) && (p->key->len == str->len)) {
if (!memcmp(p->key->val, str->val, str->len)) {
zend_string_release(str);
return p->key;
}
}
idx = Z_NEXT(p->val);
}
if (ZCSG(interned_strings_top) + ZEND_MM_ALIGNED_SIZE(_STR_HEADER_SIZE + str->len + 1) >=
ZCSG(interned_strings_end)) {
/* no memory, return the same non-interned string */
zend_accel_error(ACCEL_LOG_WARNING, "Interned string buffer overflow");
return str;
}
/* create new interning string in shared interned strings buffer */
idx = ZCSG(interned_strings).nNumUsed++;
ZCSG(interned_strings).nNumOfElements++;
p = ZCSG(interned_strings).arData + idx;
p->key = (zend_string*) ZCSG(interned_strings_top);
ZCSG(interned_strings_top) += ZEND_MM_ALIGNED_SIZE(_STR_HEADER_SIZE + str->len + 1);
p->h = h;
GC_REFCOUNT(p->key) = 1;
#if 1
/* optimized single assignment */
GC_TYPE_INFO(p->key) = IS_STRING | ((IS_STR_INTERNED | IS_STR_PERMANENT) << 8);
#else
GC_TYPE(p->key) = IS_STRING;
GC_FLAGS(p->key) = IS_STR_INTERNED | IS_STR_PERMANENT;
#endif
p->key->h = str->h;
p->key->len = str->len;
memcpy(p->key->val, str->val, str->len);
ZVAL_STR(&p->val, p->key);
Z_NEXT(p->val) = ZCSG(interned_strings).arHash[nIndex];
ZCSG(interned_strings).arHash[nIndex] = idx;
zend_string_release(str);
return p->key;
#else
return str;
#endif
}
#ifndef ZTS
/* Copy PHP interned strings from PHP process memory into the shared memory */
static void accel_use_shm_interned_strings(void)
{
uint idx, j;
Bucket *p, *q;
/* empty string */
CG(empty_string) = accel_new_interned_string(CG(empty_string));
for (j = 0; j < 256; j++) {
char s[2];
s[0] = j;
s[1] = 0;
CG(one_char_string)[j] = accel_new_interned_string(zend_string_init(s, 1, 0));
}
/* function table hash keys */
for (idx = 0; idx < CG(function_table)->nNumUsed; idx++) {
p = CG(function_table)->arData + idx;
if (Z_TYPE(p->val) == IS_UNDEF) continue;
if (p->key) {
p->key = accel_new_interned_string(p->key);
}
if (Z_FUNC(p->val)->common.function_name) {
Z_FUNC(p->val)->common.function_name = accel_new_interned_string(Z_FUNC(p->val)->common.function_name);
}
}
/* class table hash keys, class names, properties, methods, constants, etc */
for (idx = 0; idx < CG(class_table)->nNumUsed; idx++) {
zend_class_entry *ce;
p = CG(class_table)->arData + idx;
if (Z_TYPE(p->val) == IS_UNDEF) continue;
ce = (zend_class_entry*)Z_PTR(p->val);
if (p->key) {
p->key = accel_new_interned_string(p->key);
}
if (ce->name) {
ce->name = accel_new_interned_string(ce->name);
}
for (j = 0; j < ce->properties_info.nNumUsed; j++) {
zend_property_info *info;
q = ce->properties_info.arData + j;
if (Z_TYPE(q->val) == IS_UNDEF) continue;
info = (zend_property_info*)Z_PTR(q->val);
if (q->key) {
q->key = accel_new_interned_string(q->key);
}
if (info->name) {
info->name = accel_new_interned_string(info->name);
}
}
for (j = 0; j < ce->function_table.nNumUsed; j++) {
q = ce->function_table.arData + j;
if (Z_TYPE(q->val) == IS_UNDEF) continue;
if (q->key) {
q->key = accel_new_interned_string(q->key);
}
if (Z_FUNC(q->val)->common.function_name) {
Z_FUNC(q->val)->common.function_name = accel_new_interned_string(Z_FUNC(q->val)->common.function_name);
}
}
for (j = 0; j < ce->constants_table.nNumUsed; j++) {
q = ce->constants_table.arData + j;
if (!Z_TYPE(q->val) == IS_UNDEF) continue;
if (q->key) {
q->key = accel_new_interned_string(q->key);
}
}
}
/* constant hash keys */
for (idx = 0; idx < EG(zend_constants)->nNumUsed; idx++) {
p = EG(zend_constants)->arData + idx;
if (!Z_TYPE(p->val) == IS_UNDEF) continue;
if (p->key) {
p->key = accel_new_interned_string(p->key);
}
}
/* auto globals hash keys and names */
for (idx = 0; idx < CG(auto_globals)->nNumUsed; idx++) {
zend_auto_global *auto_global;
p = CG(auto_globals)->arData + idx;
if (Z_TYPE(p->val) == IS_UNDEF) continue;
auto_global = (zend_auto_global*)Z_PTR(p->val);;
auto_global->name = accel_new_interned_string(auto_global->name);
if (p->key) {
p->key = accel_new_interned_string(p->key);
}
}
}
#endif
static inline void accel_restart_enter(void)
{
#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(void)
{
#ifdef ZEND_WIN32
ZCSG(restart_in_progress) = 0;
DECREMENT(restart_in);
#else
static const FLOCK_STRUCTURE(restart_finished, F_UNLCK, SEEK_SET, 2, 1);
ZCSG(restart_in_progress) = 0;
if (fcntl(lock_file, F_SETLK, &restart_finished) == -1) {
zend_accel_error(ACCEL_LOG_DEBUG, "RestartC(-1): %s (%d)", strerror(errno), errno);
}
#endif
}
static inline int accel_restart_is_active(void)
{
if (ZCSG(restart_in_progress)) {
#ifndef ZEND_WIN32
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(void)
{
#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(void)
{
#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(void)
{
#ifdef ZEND_WIN32
accel_deactivate_sub();
#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_ERROR, "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_ERROR, "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(void)
{
#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, zend_stat_t *statbuf)
{
php_stream_wrapper *wrapper;
php_stream_statbuf stream_statbuf;
int ret, er;
if (!filename) {
return FAILURE;
}
wrapper = php_stream_locate_url_wrapper(filename, NULL, STREAM_LOCATE_WRAPPERS_ONLY);
if (!wrapper) {
return FAILURE;
}
if (!wrapper->wops || !wrapper->wops->url_stat) {
statbuf->st_mtime = 1;
return SUCCESS; /* anything other than 0 is considered to be a valid timestamp */
}
er = EG(error_reporting);
EG(error_reporting) = 0;
zend_try {
ret = wrapper->wops->url_stat(wrapper, (char*)filename, PHP_STREAM_URL_STAT_QUIET, &stream_statbuf, NULL);
} zend_catch {
ret = -1;
} zend_end_try();
EG(error_reporting) = er;
if (ret != 0) {
return FAILURE;
}
*statbuf = stream_statbuf.sb;
return SUCCESS;
}
#if ZEND_WIN32
static accel_time_t zend_get_file_handle_timestamp_win(zend_file_handle *file_handle, size_t *size)
{
static unsigned __int64 utc_base = 0;
static FILETIME utc_base_ft;
WIN32_FILE_ATTRIBUTE_DATA fdata;
if (!file_handle->opened_path) {
return 0;
}
if (!utc_base) {
SYSTEMTIME st;
st.wYear = 1970;
st.wMonth = 1;
st.wDay = 1;
st.wHour = 0;
st.wMinute = 0;
st.wSecond = 0;
st.wMilliseconds = 0;
SystemTimeToFileTime (&st, &utc_base_ft);
utc_base = (((unsigned __int64)utc_base_ft.dwHighDateTime) << 32) + utc_base_ft.dwLowDateTime;
}
if (file_handle->opened_path && GetFileAttributesEx(file_handle->opened_path->val, GetFileExInfoStandard, &fdata) != 0) {
unsigned __int64 ftime;
if (CompareFileTime (&fdata.ftLastWriteTime, &utc_base_ft) < 0) {
return 0;
}
ftime = (((unsigned __int64)fdata.ftLastWriteTime.dwHighDateTime) << 32) + fdata.ftLastWriteTime.dwLowDateTime - utc_base;
ftime /= 10000000L;
if (size) {
*size = (size_t)((((unsigned __int64)fdata.nFileSizeHigh) << 32) + (unsigned __int64)fdata.nFileSizeLow);
}
return (accel_time_t)ftime;
}
return 0;
}
#endif
static accel_time_t zend_get_file_handle_timestamp(zend_file_handle *file_handle, size_t *size)
{
zend_stat_t statbuf;
#ifdef ZEND_WIN32
accel_time_t res;
#endif
if (sapi_module.get_stat &&
!EG(current_execute_data) &&
file_handle->filename == SG(request_info).path_translated) {
zend_stat_t *tmpbuf = sapi_module.get_stat();
if (tmpbuf) {
if (size) {
*size = tmpbuf->st_size;
}
return tmpbuf->st_mtime;
}
}
#ifdef ZEND_WIN32
res = zend_get_file_handle_timestamp_win(file_handle, size);
if (res) {
return res;
}
#endif
switch (file_handle->type) {
case ZEND_HANDLE_FD:
if (zend_fstat(file_handle->handle.fd, &statbuf) == -1) {
return 0;
}
break;
case ZEND_HANDLE_FP:
if (zend_fstat(fileno(file_handle->handle.fp), &statbuf) == -1) {
if (zend_get_stream_timestamp(file_handle->filename, &statbuf) != SUCCESS) {
return 0;
}
}
break;
case ZEND_HANDLE_FILENAME:
case ZEND_HANDLE_MAPPED:
if (file_handle->opened_path) {
char *file_path = file_handle->opened_path->val;
if (is_stream_path(file_path)) {
if (zend_get_stream_timestamp(file_path, &statbuf) == SUCCESS) {
break;
}
}
if (VCWD_STAT(file_path, &statbuf) != -1) {
break;
}
}
if (zend_get_stream_timestamp(file_handle->filename, &statbuf) != SUCCESS) {
return 0;
}
break;
case ZEND_HANDLE_STREAM:
{
php_stream *stream = (php_stream *)file_handle->handle.stream.handle;
php_stream_statbuf sb;
int ret, er;
if (!stream ||
!stream->ops ||
!stream->ops->stat) {
return 0;
}
er = EG(error_reporting);
EG(error_reporting) = 0;
zend_try {
ret = stream->ops->stat(stream, &sb);
} zend_catch {
ret = -1;
} zend_end_try();
EG(error_reporting) = er;
if (ret != 0) {
return 0;
}
statbuf = sb.sb;
}
break;
default:
return 0;
}
if (size) {
*size = statbuf.st_size;
}
return statbuf.st_mtime;
}
static inline int do_validate_timestamps(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
{
zend_file_handle ps_handle;
zend_string *full_path_ptr = NULL;
/** check that the persistent 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 (persistent_script->full_path != file_handle->opened_path &&
(persistent_script->full_path->len != file_handle->opened_path->len ||
memcmp(persistent_script->full_path->val, file_handle->opened_path->val, file_handle->opened_path->len) != 0)) {
return FAILURE;
}
} else {
full_path_ptr = accelerator_orig_zend_resolve_path(file_handle->filename, strlen(file_handle->filename));
if (full_path_ptr &&
persistent_script->full_path != full_path_ptr &&
(persistent_script->full_path->len != full_path_ptr->len ||
memcmp(persistent_script->full_path->val, full_path_ptr->val, full_path_ptr->len) != 0)) {
zend_string_release(full_path_ptr);
return FAILURE;
}
file_handle->opened_path = full_path_ptr;
}
if (persistent_script->timestamp == 0) {
if (full_path_ptr) {
zend_string_release(full_path_ptr);
file_handle->opened_path = NULL;
}
return FAILURE;
}
if (zend_get_file_handle_timestamp(file_handle, NULL) == persistent_script->timestamp) {
if (full_path_ptr) {
zend_string_release(full_path_ptr);
file_handle->opened_path = NULL;
}
return SUCCESS;
}
if (full_path_ptr) {
zend_string_release(full_path_ptr);
file_handle->opened_path = NULL;
}
ps_handle.type = ZEND_HANDLE_FILENAME;
ps_handle.filename = persistent_script->full_path->val;
ps_handle.opened_path = persistent_script->full_path;
if (zend_get_file_handle_timestamp(&ps_handle, NULL) == persistent_script->timestamp) {
return SUCCESS;
}
return FAILURE;
}
int validate_timestamp_and_record(zend_persistent_script *persistent_script, zend_file_handle *file_handle)
{
if (ZCG(accel_directives).revalidate_freq &&
persistent_script->dynamic_members.revalidate >= ZCG(request_time)) {
return SUCCESS;
} else if (do_validate_timestamps(persistent_script, file_handle) == FAILURE) {
return FAILURE;
} else {
persistent_script->dynamic_members.revalidate = ZCG(request_time) + ZCG(accel_directives).revalidate_freq;
return SUCCESS;
}
}
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(const char *path, int path_length, int *key_len)
{
int key_length;
/* CWD and include_path don't matter for absolute file names and streams */
if (IS_ABSOLUTE_PATH(path, path_length)) {
/* pass */
} else if (UNEXPECTED(is_stream_path(path))) {
if (!is_cacheable_stream_path(path)) {
return NULL;
}
/* pass */
} else if (UNEXPECTED(!ZCG(accel_directives).use_cwd)) {
/* pass */
} else {
const char *include_path = NULL, *cwd = NULL;
int include_path_len = 0, cwd_len = 0;
zend_string *parent_script = NULL;
size_t parent_script_len = 0;
if (EXPECTED(ZCG(cwd_key_len))) {
cwd = ZCG(cwd_key);
cwd_len = ZCG(cwd_key_len);
} else {
zend_string *cwd_str = accel_getcwd();
if (UNEXPECTED(!cwd_str)) {
/* we don't handle this well for now. */
zend_accel_error(ACCEL_LOG_INFO, "getcwd() failed for '%s' (%d), please try to set opcache.use_cwd to 0 in ini file", path, errno);
return NULL;
}
cwd = cwd_str->val;
cwd_len = cwd_str->len;
#ifndef ZTS
if (ZCG(cwd_check)) {
ZCG(cwd_check) = 0;
if ((ZCG(counted) || ZCSG(accelerator_enabled))) {
zend_string *str = accel_find_interned_string(cwd_str);
if (!str) {
SHM_UNPROTECT();
zend_shared_alloc_lock();
str = accel_new_interned_string(zend_string_copy(cwd_str));
if (str == cwd_str) {
str = NULL;
}
zend_shared_alloc_unlock();
SHM_PROTECT();
}
if (str) {
char buf[32];
char *res = zend_print_long_to_buf(buf + sizeof(buf) - 1, str->val - ZCSG(interned_strings_start));
cwd_len = ZCG(cwd_key_len) = buf + sizeof(buf) - 1 - res;
cwd = ZCG(cwd_key);
memcpy(ZCG(cwd_key), res, cwd_len + 1);
}
}
}
#endif
}
if (EXPECTED(ZCG(include_path_key_len))) {
include_path = ZCG(include_path_key);
include_path_len = ZCG(include_path_key_len);
} else if (!ZCG(include_path) || ZCG(include_path)->len == 0) {
include_path = "";
include_path_len = 0;
} else {
include_path = ZCG(include_path)->val;
include_path_len = ZCG(include_path)->len;
#ifndef ZTS
if (ZCG(include_path_check)) {
ZCG(include_path_check) = 0;
if ((ZCG(counted) || ZCSG(accelerator_enabled))) {
zend_string *str = accel_find_interned_string(ZCG(include_path));
if (!str) {