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Avoid reallocation and double copying of variable names.

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This commit is contained in:
Dmitry Stogov 2017-12-12 13:47:47 +03:00
parent 2bbcc04c20
commit fe4c7898d8
1 changed files with 67 additions and 33 deletions
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98
main/php_variables.c
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@ -59,6 +59,14 @@ PHPAPI void php_register_variable_safe(char *var, char *strval, size_t str_len,
php_register_variable_ex(var, &new_entry, track_vars_array);
}
static zend_always_inline void php_register_variable_quick(const char *name, size_t name_len, zval *val, HashTable *ht)
{
zend_string *key = zend_string_init_interned(name, name_len, 0);
zend_hash_update_ind(ht, key, val);
zend_string_release(key);
}
PHPAPI void php_register_variable_ex(char *var_name, zval *val, zval *track_vars_array)
{
char *p = NULL;
@ -236,12 +244,13 @@ PHPAPI void php_register_variable_ex(char *var_name, zval *val, zval *track_vars
}
} else {
plain_var:
ZVAL_COPY_VALUE(&gpc_element, val);
if (!index) {
if ((gpc_element_p = zend_hash_next_index_insert(symtable1, &gpc_element)) == NULL) {
zval_ptr_dtor(&gpc_element);
if (zend_hash_next_index_insert(symtable1, val) == NULL) {
zval_ptr_dtor(val);
}
} else {
zend_ulong idx;
/*
* According to rfc2965, more specific paths are listed above the less specific ones.
* If we encounter a duplicate cookie name, we should skip it, since it is not possible
@ -251,11 +260,11 @@ plain_var:
if (Z_TYPE(PG(http_globals)[TRACK_VARS_COOKIE]) != IS_UNDEF &&
symtable1 == Z_ARRVAL(PG(http_globals)[TRACK_VARS_COOKIE]) &&
zend_symtable_str_exists(symtable1, index, index_len)) {
zval_ptr_dtor(&gpc_element);
zval_ptr_dtor(val);
} else if (ZEND_HANDLE_NUMERIC_STR(index, index_len, idx)) {
zend_hash_index_update(symtable1, idx, val);
} else {
zend_string *key = zend_string_init_interned(index, index_len, 0);
gpc_element_p = zend_symtable_update_ind(symtable1, key, &gpc_element);
zend_string_release(key);
php_register_variable_quick(index, index_len, val, symtable1);
}
}
}
@ -520,29 +529,48 @@ next_cookie:
}
}
static zend_always_inline int valid_environment_name(const char *name, const char *end)
{
const char *s;
for (s = name; s < end; s++) {
if (*s == ' ' | *s == '.' || *s == '[') {
return 0;
}
}
return 1;
}
void _php_import_environment_variables(zval *array_ptr)
{
char buf[128];
char **env, *p, *t = buf;
size_t alloc_size = sizeof(buf);
unsigned long nlen; /* ptrdiff_t is not portable */
char **env, *p;
size_t name_len, len;
zval val;
zend_ulong idx;
for (env = environ; env != NULL && *env != NULL; env++) {
p = strchr(*env, '=');
if (!p) { /* malformed entry? */
if (!p
|| p == *env
|| !valid_environment_name(*env, p)) {
/* malformed entry? */
continue;
}
nlen = p - *env;
if (nlen >= alloc_size) {
alloc_size = nlen + 64;
t = (t == buf ? emalloc(alloc_size): erealloc(t, alloc_size));
name_len = p - *env;
p++;
len = strlen(p);
if (len == 0) {
ZVAL_EMPTY_STRING(&val);
} else if (len == 1) {
ZVAL_INTERNED_STR(&val, ZSTR_CHAR((zend_uchar)*p));
} else {
ZVAL_NEW_STR(&val, zend_string_init(p, len, 0));
}
memcpy(t, *env, nlen);
t[nlen] = '\0';
php_register_variable(t, p + 1, array_ptr);
if (ZEND_HANDLE_NUMERIC_STR(*env, name_len, idx)) {
zend_hash_index_update(Z_ARRVAL_P(array_ptr), idx, &val);
} else {
php_register_variable_quick(*env, name_len, &val, Z_ARRVAL_P(array_ptr));
}
if (t != buf && t != NULL) {
efree(t);
}
}
@ -622,32 +650,38 @@ PHPAPI void php_build_argv(char *s, zval *track_vars_array)
*/
static inline void php_register_server_variables(void)
{
zval request_time_float, request_time_long;
zval tmp;
zval *arr = &PG(http_globals)[TRACK_VARS_SERVER];
HashTable *ht;
zval_ptr_dtor(&PG(http_globals)[TRACK_VARS_SERVER]);
array_init(&PG(http_globals)[TRACK_VARS_SERVER]);
zval_ptr_dtor(arr);
array_init(arr);
/* Server variables */
if (sapi_module.register_server_variables) {
sapi_module.register_server_variables(&PG(http_globals)[TRACK_VARS_SERVER]);
sapi_module.register_server_variables(arr);
}
ht = Z_ARRVAL_P(arr);
/* PHP Authentication support */
if (SG(request_info).auth_user) {
php_register_variable("PHP_AUTH_USER", SG(request_info).auth_user, &PG(http_globals)[TRACK_VARS_SERVER]);
ZVAL_STRING(&tmp, SG(request_info).auth_user);
php_register_variable_quick("PHP_AUTH_USER", sizeof("PHP_AUTH_USER")-1, &tmp, ht);
}
if (SG(request_info).auth_password) {
php_register_variable("PHP_AUTH_PW", SG(request_info).auth_password, &PG(http_globals)[TRACK_VARS_SERVER]);
ZVAL_STRING(&tmp, SG(request_info).auth_password);
php_register_variable_quick("PHP_AUTH_PW", sizeof("PHP_AUTH_PW")-1, &tmp, ht);
}
if (SG(request_info).auth_digest) {
php_register_variable("PHP_AUTH_DIGEST", SG(request_info).auth_digest, &PG(http_globals)[TRACK_VARS_SERVER]);
ZVAL_STRING(&tmp, SG(request_info).auth_digest);
php_register_variable_quick("PHP_AUTH_DIGEST", sizeof("PHP_AUTH_DIGEST")-1, &tmp, ht);
}
/* store request init time */
ZVAL_DOUBLE(&request_time_float, sapi_get_request_time());
php_register_variable_ex("REQUEST_TIME_FLOAT", &request_time_float, &PG(http_globals)[TRACK_VARS_SERVER]);
ZVAL_LONG(&request_time_long, zend_dval_to_lval(Z_DVAL(request_time_float)));
php_register_variable_ex("REQUEST_TIME", &request_time_long, &PG(http_globals)[TRACK_VARS_SERVER]);
ZVAL_DOUBLE(&tmp, sapi_get_request_time());
php_register_variable_quick("REQUEST_TIME_FLOAT", sizeof("REQUEST_TIME_FLOAT")-1, &tmp, ht);
ZVAL_LONG(&tmp, zend_dval_to_lval(Z_DVAL(tmp)));
php_register_variable_quick("REQUEST_TIME", sizeof("REQUEST_TIME")-1, &tmp, ht);
}
/* }}} */