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php-src/Zend/zend_execute.c
Xinchen Hui fc33f52d8c bump year
2015-01-15 23:27:30 +08:00

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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2015 Zend Technologies Ltd. (http://www.zend.com) |
+----------------------------------------------------------------------+
| This source file is subject to version 2.00 of the Zend 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.zend.com/license/2_00.txt. |
| If you did not receive a copy of the Zend license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@zend.com so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Andi Gutmans <andi@zend.com> |
| Zeev Suraski <zeev@zend.com> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#define ZEND_INTENSIVE_DEBUGGING 0
#include <stdio.h>
#include <signal.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_execute.h"
#include "zend_API.h"
#include "zend_ptr_stack.h"
#include "zend_constants.h"
#include "zend_extensions.h"
#include "zend_ini.h"
#include "zend_exceptions.h"
#include "zend_interfaces.h"
#include "zend_closures.h"
#include "zend_generators.h"
#include "zend_vm.h"
#include "zend_dtrace.h"
#include "zend_inheritance.h"
/* Virtual current working directory support */
#include "zend_virtual_cwd.h"
#define _CONST_CODE 0
#define _TMP_CODE 1
#define _VAR_CODE 2
#define _UNUSED_CODE 3
#define _CV_CODE 4
typedef int (*incdec_t)(zval *);
#define get_zval_ptr(op_type, node, ex, should_free, type) _get_zval_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_deref(op_type, node, ex, should_free, type) _get_zval_ptr_deref(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_zval_ptr_ptr_undef(op_type, node, ex, should_free, type) _get_zval_ptr_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr(op_type, node, ex, should_free, type)
#define get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type) _get_obj_zval_ptr_ptr(op_type, node, ex, should_free, type)
/* Prototypes */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array);
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array);
#define RETURN_VALUE_USED(opline) (!((opline)->result_type & EXT_TYPE_UNUSED))
static ZEND_FUNCTION(pass)
{
}
static const zend_internal_function zend_pass_function = {
ZEND_INTERNAL_FUNCTION, /* type */
0, /* fn_flags */
NULL, /* name */
NULL, /* scope */
NULL, /* prototype */
0, /* num_args */
0, /* required_num_args */
NULL, /* arg_info */
ZEND_FN(pass), /* handler */
NULL /* module */
};
#undef zval_ptr_dtor
#define zval_ptr_dtor(zv) i_zval_ptr_dtor(zv ZEND_FILE_LINE_CC)
#define PZVAL_LOCK(z) if (Z_REFCOUNTED_P(z)) Z_ADDREF_P((z))
#define SELECTIVE_PZVAL_LOCK(pzv, opline) if (RETURN_VALUE_USED(opline)) { PZVAL_LOCK(pzv); }
#define READY_TO_DESTROY(zv) \
(zv && Z_REFCOUNTED_P(zv) && Z_REFCOUNT_P(zv) == 1)
#define EXTRACT_ZVAL_PTR(zv) do { \
zval *__zv = (zv); \
if (Z_TYPE_P(__zv) == IS_INDIRECT) { \
ZVAL_COPY(__zv, Z_INDIRECT_P(__zv)); \
} \
} while (0)
#define FREE_OP(should_free) \
if (should_free) { \
zval_ptr_dtor_nogc(should_free); \
}
#define FREE_OP_VAR_PTR(should_free) \
if (should_free) { \
zval_ptr_dtor_nogc(should_free); \
}
/* End of zend_execute_locks.h */
#define CV_DEF_OF(i) (EX(func)->op_array.vars[i])
#define CTOR_CALL_BIT 0x1
#define CTOR_USED_BIT 0x2
#define IS_CTOR_CALL(ce) (((zend_uintptr_t)(ce)) & CTOR_CALL_BIT)
#define IS_CTOR_USED(ce) (((zend_uintptr_t)(ce)) & CTOR_USED_BIT)
#define ENCODE_CTOR(ce, used) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) | CTOR_CALL_BIT | ((used) ? CTOR_USED_BIT : 0)))
#define DECODE_CTOR(ce) \
((zend_class_entry*)(((zend_uintptr_t)(ce)) & ~(CTOR_CALL_BIT|CTOR_USED_BIT)))
#define ZEND_VM_STACK_PAGE_SLOTS (16 * 1024) /* should be a power of 2 */
#define ZEND_VM_STACK_PAGE_SIZE (ZEND_VM_STACK_PAGE_SLOTS * sizeof(zval))
#define ZEND_VM_STACK_FREE_PAGE_SIZE \
((ZEND_VM_STACK_PAGE_SLOTS - ZEND_VM_STACK_HEADER_SLOTS) * sizeof(zval))
#define ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size) \
(((size) + (ZEND_VM_STACK_FREE_PAGE_SIZE - 1)) & ~ZEND_VM_STACK_PAGE_SIZE)
static zend_always_inline zend_vm_stack zend_vm_stack_new_page(size_t size, zend_vm_stack prev) {
zend_vm_stack page = (zend_vm_stack)emalloc(size);
page->top = ZEND_VM_STACK_ELEMETS(page);
page->end = (zval*)((char*)page + size);
page->prev = prev;
return page;
}
ZEND_API void zend_vm_stack_init(void)
{
EG(vm_stack) = zend_vm_stack_new_page(ZEND_VM_STACK_PAGE_SIZE, NULL);
EG(vm_stack)->top++;
EG(vm_stack_top) = EG(vm_stack)->top;
EG(vm_stack_end) = EG(vm_stack)->end;
}
ZEND_API void zend_vm_stack_destroy(void)
{
zend_vm_stack stack = EG(vm_stack);
while (stack != NULL) {
zend_vm_stack p = stack->prev;
efree(stack);
stack = p;
}
}
ZEND_API void* zend_vm_stack_extend(size_t size)
{
zend_vm_stack stack;
void *ptr;
stack = EG(vm_stack);
stack->top = EG(vm_stack_top);
EG(vm_stack) = stack = zend_vm_stack_new_page(
EXPECTED(size < ZEND_VM_STACK_FREE_PAGE_SIZE) ?
ZEND_VM_STACK_PAGE_SIZE : ZEND_VM_STACK_PAGE_ALIGNED_SIZE(size),
stack);
ptr = stack->top;
EG(vm_stack_top) = (void*)(((char*)ptr) + size);
EG(vm_stack_end) = stack->end;
return ptr;
}
ZEND_API zval* zend_get_compiled_variable_value(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_tmp(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
ZEND_ASSERT(Z_TYPE_P(ret) != IS_REFERENCE);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
return ret;
}
static zend_always_inline zval *_get_zval_ptr_var_deref(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
*should_free = ret;
ZVAL_DEREF(ret);
return ret;
}
static zend_never_inline zval *_get_zval_cv_lookup(zval *ptr, uint32_t var, int type, const zend_execute_data *execute_data)
{
zend_string *cv;
switch (type) {
case BP_VAR_R:
case BP_VAR_UNSET:
cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
/* break missing intentionally */
case BP_VAR_IS:
ptr = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(ptr);
break;
}
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_R(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_UNSET(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return &EG(uninitialized_zval);
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_RW(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
zend_string *cv = CV_DEF_OF(EX_VAR_TO_NUM(var));
ZVAL_NULL(ptr);
zend_error(E_NOTICE, "Undefined variable: %s", cv->val);
return ptr;
}
static zend_always_inline zval *_get_zval_cv_lookup_BP_VAR_W(zval *ptr, uint32_t var, const zend_execute_data *execute_data)
{
ZVAL_NULL(ptr);
return ptr;
}
static zend_always_inline zval *_get_zval_ptr_cv(const zend_execute_data *execute_data, uint32_t var, int type)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref(const zend_execute_data *execute_data, uint32_t var, int type)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup(ret, var, type, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_R(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_R(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_UNSET(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_UNSET(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_IS(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_RW(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (UNEXPECTED(Z_TYPE_P(ret) == IS_UNDEF)) {
return _get_zval_cv_lookup_BP_VAR_RW(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
}
return ret;
}
static zend_always_inline zval *_get_zval_ptr_cv_undef_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
return EX_VAR(var);
}
static zend_always_inline zval *_get_zval_ptr_cv_deref_BP_VAR_W(const zend_execute_data *execute_data, uint32_t var)
{
zval *ret = EX_VAR(var);
if (Z_TYPE_P(ret) == IS_UNDEF) {
return _get_zval_cv_lookup_BP_VAR_W(ret, var, execute_data);
}
ZVAL_DEREF(ret);
return ret;
}
static zend_always_inline zval *_get_zval_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else {
ZEND_ASSERT(op_type == IS_CV);
return _get_zval_ptr_cv(execute_data, node.var, type);
}
}
}
static zend_always_inline zval *_get_zval_ptr_deref(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type & (IS_TMP_VAR|IS_VAR)) {
if (op_type == IS_TMP_VAR) {
return _get_zval_ptr_tmp(node.var, execute_data, should_free);
} else {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_var_deref(node.var, execute_data, should_free);
}
} else {
*should_free = NULL;
if (op_type == IS_CONST) {
return EX_CONSTANT(node);
} else {
ZEND_ASSERT(op_type == IS_CV);
return _get_zval_ptr_cv_deref(execute_data, node.var, type);
}
}
}
static zend_always_inline zval *_get_zval_ptr_ptr_var(uint32_t var, const zend_execute_data *execute_data, zend_free_op *should_free)
{
zval *ret = EX_VAR(var);
if (EXPECTED(Z_TYPE_P(ret) == IS_INDIRECT)) {
*should_free = NULL;
ret = Z_INDIRECT_P(ret);
} else {
*should_free = ret;
if (Z_REFCOUNTED_P(ret) && Z_REFCOUNT_P(ret) > 1) {
*should_free = NULL;
Z_DELREF_P(ret);
}
}
return ret;
}
static inline zval *_get_zval_ptr_ptr(int op_type, znode_op node, const zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_CV) {
*should_free = NULL;
return _get_zval_ptr_cv(execute_data, node.var, type);
} else /* if (op_type == IS_VAR) */ {
ZEND_ASSERT(op_type == IS_VAR);
return _get_zval_ptr_ptr_var(node.var, execute_data, should_free);
}
}
static zend_always_inline zval *_get_obj_zval_ptr_unused(zend_execute_data *execute_data)
{
if (EXPECTED(Z_OBJ(EX(This)) != NULL)) {
return &EX(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
return NULL;
}
}
static inline zval *_get_obj_zval_ptr(int op_type, znode_op op, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(Z_OBJ(EX(This)) != NULL)) {
*should_free = NULL;
return &EX(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr(op_type, op, execute_data, should_free, type);
}
static inline zval *_get_obj_zval_ptr_ptr(int op_type, znode_op node, zend_execute_data *execute_data, zend_free_op *should_free, int type)
{
if (op_type == IS_UNUSED) {
if (EXPECTED(Z_OBJ(EX(This)) != NULL)) {
*should_free = NULL;
return &EX(This);
} else {
zend_error_noreturn(E_ERROR, "Using $this when not in object context");
}
}
return get_zval_ptr_ptr(op_type, node, execute_data, should_free, type);
}
static inline void zend_assign_to_variable_reference(zval *variable_ptr, zval *value_ptr)
{
if (EXPECTED(variable_ptr != value_ptr)) {
zend_reference *ref;
ZVAL_MAKE_REF(value_ptr);
Z_ADDREF_P(value_ptr);
ref = Z_REF_P(value_ptr);
zval_ptr_dtor(variable_ptr);
ZVAL_REF(variable_ptr, ref);
} else {
ZVAL_MAKE_REF(variable_ptr);
}
}
/* this should modify object only if it's empty */
static inline int make_real_object(zval **object_ptr)
{
zval *object = *object_ptr;
ZVAL_DEREF(object);
if (UNEXPECTED(Z_TYPE_P(object) != IS_OBJECT)) {
if (EXPECTED(Z_TYPE_P(object) <= IS_FALSE)
|| (Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0)) {
zval_ptr_dtor_nogc(object);
object_init(object);
zend_error(E_WARNING, "Creating default object from empty value");
} else {
return 0;
}
}
*object_ptr = object;
return 1;
}
ZEND_API char * zend_verify_internal_arg_class_kind(const zend_internal_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce)
{
zend_string *key;
ALLOCA_FLAG(use_heap);
STR_ALLOCA_INIT(key, cur_arg_info->class_name, strlen(cur_arg_info->class_name), use_heap);
*pce = zend_fetch_class(key, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
STR_ALLOCA_FREE(key, use_heap);
*class_name = (*pce) ? (*pce)->name->val : (char*)cur_arg_info->class_name;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}
ZEND_API char * zend_verify_arg_class_kind(const zend_arg_info *cur_arg_info, char **class_name, zend_class_entry **pce)
{
*pce = zend_fetch_class(cur_arg_info->class_name, (ZEND_FETCH_CLASS_AUTO | ZEND_FETCH_CLASS_NO_AUTOLOAD));
*class_name = (*pce) ? (*pce)->name->val : cur_arg_info->class_name->val;
if (*pce && (*pce)->ce_flags & ZEND_ACC_INTERFACE) {
return "implement interface ";
} else {
return "be an instance of ";
}
}
ZEND_API void zend_verify_arg_error(int error_type, const zend_function *zf, uint32_t arg_num, const char *need_msg, const char *need_kind, const char *given_msg, const char *given_kind, zval *arg)
{
zend_execute_data *ptr = EG(current_execute_data)->prev_execute_data;
const char *fname = zf->common.function_name->val;
const char *fsep;
const char *fclass;
zval old_arg;
if (zf->common.scope) {
fsep = "::";
fclass = zf->common.scope->name->val;
} else {
fsep = "";
fclass = "";
}
if (zf->common.type == ZEND_USER_FUNCTION) {
if (arg) {
ZVAL_COPY_VALUE(&old_arg, arg);
ZVAL_UNDEF(arg);
}
if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given, called in %s on line %d and defined", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind, ptr->func->op_array.filename->val, ptr->opline->lineno);
} else {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
if (arg) {
ZVAL_COPY_VALUE(arg, &old_arg);
}
} else {
zend_error(error_type, "Argument %d passed to %s%s%s() must %s%s, %s%s given", arg_num, fclass, fsep, fname, need_msg, need_kind, given_msg, given_kind);
}
}
static int is_null_constant(zval *default_value)
{
if (Z_CONSTANT_P(default_value)) {
zval constant;
ZVAL_COPY_VALUE(&constant, default_value);
zval_update_constant(&constant, 0);
if (Z_TYPE(constant) == IS_NULL) {
return 1;
}
zval_dtor(&constant);
}
return 0;
}
static void zend_verify_internal_arg_type(zend_function *zf, uint32_t arg_num, zval *arg)
{
zend_internal_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->internal_function.num_args)) {
cur_arg_info = &zf->internal_function.arg_info[arg_num-1];
} else if (zf->internal_function.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->internal_function.arg_info[zf->internal_function.num_args];
} else {
return;
}
if (cur_arg_info->class_name) {
char *class_name;
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) == IS_OBJECT) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "instance of ", Z_OBJCE_P(arg)->name->val, arg);
}
} else if (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null) {
need_msg = zend_verify_internal_arg_class_kind((zend_internal_arg_info*)cur_arg_info, &class_name, &ce);
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "", arg);
}
} else if (cur_arg_info->type_hint) {
if (cur_arg_info->type_hint == IS_ARRAY) {
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) != IS_ARRAY && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", zend_zval_type_name(arg), "", arg);
}
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL) && (Z_TYPE_P(arg) != IS_NULL || !cur_arg_info->allow_null)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
}
#if ZEND_DEBUG
} else {
zend_error(E_ERROR, "Unknown typehint");
#endif
}
}
}
static void zend_verify_arg_type(zend_function *zf, uint32_t arg_num, zval *arg, zval *default_value)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (zf->common.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args];
} else {
return;
}
if (cur_arg_info->class_name) {
char *class_name;
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) == IS_OBJECT) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, &class_name, &ce);
if (!ce || !instanceof_function(Z_OBJCE_P(arg), ce)) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "instance of ", Z_OBJCE_P(arg)->name->val, arg);
}
} else if (Z_TYPE_P(arg) != IS_NULL || !(cur_arg_info->allow_null || (default_value && is_null_constant(default_value)))) {
need_msg = zend_verify_arg_class_kind(cur_arg_info, &class_name, &ce);
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, zend_zval_type_name(arg), "", arg);
}
} else if (cur_arg_info->type_hint) {
if (cur_arg_info->type_hint == IS_ARRAY) {
ZVAL_DEREF(arg);
if (Z_TYPE_P(arg) != IS_ARRAY && (Z_TYPE_P(arg) != IS_NULL || !(cur_arg_info->allow_null || (default_value && is_null_constant(default_value))))) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", zend_zval_type_name(arg), "", arg);
}
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
if (!zend_is_callable(arg, IS_CALLABLE_CHECK_SILENT, NULL) && (Z_TYPE_P(arg) != IS_NULL || !(cur_arg_info->allow_null || (default_value && is_null_constant(default_value))))) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", zend_zval_type_name(arg), "", arg);
}
#if ZEND_DEBUG
} else {
zend_error(E_ERROR, "Unknown typehint");
#endif
}
}
}
static inline int zend_verify_missing_arg_type(zend_function *zf, uint32_t arg_num)
{
zend_arg_info *cur_arg_info;
char *need_msg;
zend_class_entry *ce;
if (EXPECTED(arg_num <= zf->common.num_args)) {
cur_arg_info = &zf->common.arg_info[arg_num-1];
} else if (zf->common.fn_flags & ZEND_ACC_VARIADIC) {
cur_arg_info = &zf->common.arg_info[zf->common.num_args];
} else {
return 1;
}
if (cur_arg_info->class_name) {
char *class_name;
need_msg = zend_verify_arg_class_kind(cur_arg_info, &class_name, &ce);
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, need_msg, class_name, "none", "", NULL);
return 0;
} else if (cur_arg_info->type_hint) {
if (cur_arg_info->type_hint == IS_ARRAY) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be of the type array", "", "none", "", NULL);
} else if (cur_arg_info->type_hint == IS_CALLABLE) {
zend_verify_arg_error(E_RECOVERABLE_ERROR, zf, arg_num, "be callable", "", "none", "", NULL);
#if ZEND_DEBUG
} else {
zend_error(E_ERROR, "Unknown typehint");
#endif
}
return 0;
}
return 1;
}
static void zend_verify_missing_arg(zend_execute_data *execute_data, uint32_t arg_num)
{
if (EXPECTED(!(EX(func)->common.fn_flags & ZEND_ACC_HAS_TYPE_HINTS)) ||
zend_verify_missing_arg_type(EX(func), arg_num)) {
const char *class_name = EX(func)->common.scope ? EX(func)->common.scope->name->val : "";
const char *space = EX(func)->common.scope ? "::" : "";
const char *func_name = EX(func)->common.function_name ? EX(func)->common.function_name->val : "main";
zend_execute_data *ptr = EX(prev_execute_data);
if (ptr && ptr->func && ZEND_USER_CODE(ptr->func->common.type)) {
zend_error(E_WARNING, "Missing argument %u for %s%s%s(), called in %s on line %d and defined", arg_num, class_name, space, func_name, ptr->func->op_array.filename->val, ptr->opline->lineno);
} else {
zend_error(E_WARNING, "Missing argument %u for %s%s%s()", arg_num, class_name, space, func_name);
}
}
}
static zend_always_inline void zend_assign_to_object(zval *retval, zval *object, uint32_t object_op_type, zval *property_name, uint32_t property_op_type, int value_type, znode_op value_op, const zend_execute_data *execute_data, void **cache_slot)
{
zend_free_op free_value;
zval *value = get_zval_ptr_deref(value_type, value_op, execute_data, &free_value, BP_VAR_R);
zval tmp;
if (object_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(object) != IS_OBJECT)) {
do {
if (object_op_type == IS_VAR && UNEXPECTED(object == &EG(error_zval))) {
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
if (Z_ISREF_P(object)) {
object = Z_REFVAL_P(object);
if (EXPECTED(Z_TYPE_P(object) == IS_OBJECT)) {
break;
}
}
if (EXPECTED(Z_TYPE_P(object) <= IS_FALSE ||
(Z_TYPE_P(object) == IS_STRING && Z_STRLEN_P(object) == 0))) {
zend_object *obj;
zval_ptr_dtor(object);
object_init(object);
Z_ADDREF_P(object);
obj = Z_OBJ_P(object);
zend_error(E_WARNING, "Creating default object from empty value");
if (GC_REFCOUNT(obj) == 1) {
/* the enclosing container was deleted, obj is unreferenced */
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
OBJ_RELEASE(obj);
return;
}
Z_DELREF_P(object);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
} while (0);
}
if (property_op_type == IS_CONST &&
EXPECTED(Z_OBJCE_P(object) == CACHED_PTR_EX(cache_slot))) {
uint32_t prop_offset = (uint32_t)(intptr_t)CACHED_PTR_EX(cache_slot + 1);
zend_object *zobj = Z_OBJ_P(object);
zval *property;
if (EXPECTED(prop_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
property = OBJ_PROP(zobj, prop_offset);
if (Z_TYPE_P(property) != IS_UNDEF) {
fast_assign:
value = zend_assign_to_variable(property, value, value_type);
if (retval && !EG(exception)) {
ZVAL_COPY(retval, value);
}
if (value_type == IS_VAR) {
FREE_OP(free_value);
}
return;
}
} else {
if (EXPECTED(zobj->properties != NULL)) {
property = zend_hash_find(zobj->properties, Z_STR_P(property_name));
if (property) {
goto fast_assign;
}
}
if (!zobj->ce->__set) {
if (EXPECTED(zobj->properties == NULL)) {
rebuild_object_properties(zobj);
}
/* separate our value if necessary */
if (value_type == IS_CONST) {
if (UNEXPECTED(Z_OPT_COPYABLE_P(value))) {
ZVAL_COPY_VALUE(&tmp, value);
zval_copy_ctor_func(&tmp);
value = &tmp;
}
} else if (value_type != IS_TMP_VAR &&
Z_REFCOUNTED_P(value)) {
Z_ADDREF_P(value);
}
zend_hash_add_new(zobj->properties, Z_STR_P(property_name), value);
if (retval && !EG(exception)) {
ZVAL_COPY(retval, value);
}
if (value_type == IS_VAR) {
FREE_OP(free_value);
}
return;
}
}
}
if (!Z_OBJ_HT_P(object)->write_property) {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
FREE_OP(free_value);
return;
}
/* separate our value if necessary */
if (value_type == IS_CONST) {
if (UNEXPECTED(Z_OPT_COPYABLE_P(value))) {
ZVAL_COPY_VALUE(&tmp, value);
zval_copy_ctor_func(&tmp);
value = &tmp;
}
} else if (value_type != IS_TMP_VAR &&
Z_REFCOUNTED_P(value)) {
Z_ADDREF_P(value);
}
Z_OBJ_HT_P(object)->write_property(object, property_name, value, cache_slot);
if (retval && !EG(exception)) {
ZVAL_COPY(retval, value);
}
zval_ptr_dtor(value);
if (value_type == IS_VAR) {
FREE_OP(free_value);
}
}
static zend_always_inline void zend_assign_to_object_dim(zval *retval, zval *object, zval *property_name, int value_type, znode_op value_op, const zend_execute_data *execute_data)
{
zend_free_op free_value;
zval *value = get_zval_ptr_deref(value_type, value_op, execute_data, &free_value, BP_VAR_R);
zval tmp;
/* Note: property_name in this case is really the array index! */
if (!Z_OBJ_HT_P(object)->write_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
}
/* separate our value if necessary */
if (value_type == IS_CONST) {
if (UNEXPECTED(Z_OPT_COPYABLE_P(value))) {
ZVAL_COPY_VALUE(&tmp, value);
zval_copy_ctor_func(&tmp);
value = &tmp;
}
} else if (value_type != IS_TMP_VAR &&
Z_REFCOUNTED_P(value)) {
Z_ADDREF_P(value);
}
Z_OBJ_HT_P(object)->write_dimension(object, property_name, value);
if (retval && !EG(exception)) {
ZVAL_COPY(retval, value);
}
zval_ptr_dtor(value);
if (value_type == IS_VAR) {
FREE_OP(free_value);
}
}
static void zend_binary_assign_op_obj_dim(zval *object, zval *property, zval *value, zval *retval, int (*binary_op)(zval *result, zval *op1, zval *op2))
{
zval *z;
zval rv;
if (Z_OBJ_HT_P(object)->read_dimension &&
(z = Z_OBJ_HT_P(object)->read_dimension(object, property, BP_VAR_R, &rv)) != NULL) {
if (Z_TYPE_P(z) == IS_OBJECT && Z_OBJ_HT_P(z)->get) {
zval rv;
zval *value = Z_OBJ_HT_P(z)->get(z, &rv);
if (Z_REFCOUNT_P(z) == 0) {
zend_objects_store_del(Z_OBJ_P(z));
}
ZVAL_COPY_VALUE(z, value);
}
ZVAL_DEREF(z);
SEPARATE_ZVAL_NOREF(z);
binary_op(z, z, value);
Z_OBJ_HT_P(object)->write_dimension(object, property, z);
if (retval) {
ZVAL_COPY(retval, z);
}
zval_ptr_dtor(z);
} else {
zend_error(E_WARNING, "Attempt to assign property of non-object");
if (retval) {
ZVAL_NULL(retval);
}
}
}
static void zend_assign_to_string_offset(zval *str, zend_long offset, zval *value, zval *result)
{
zend_string *old_str;
if (offset < 0) {
zend_error(E_WARNING, "Illegal string offset: " ZEND_LONG_FMT, offset);
zend_string_release(Z_STR_P(str));
if (result) {
ZVAL_NULL(result);
}
return;
}
old_str = Z_STR_P(str);
if ((size_t)offset >= Z_STRLEN_P(str)) {
zend_long old_len = Z_STRLEN_P(str);
Z_STR_P(str) = zend_string_realloc(Z_STR_P(str), offset + 1, 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
memset(Z_STRVAL_P(str) + old_len, ' ', offset - old_len);
Z_STRVAL_P(str)[offset+1] = 0;
} else if (!Z_REFCOUNTED_P(str)) {
Z_STR_P(str) = zend_string_init(Z_STRVAL_P(str), Z_STRLEN_P(str), 0);
Z_TYPE_INFO_P(str) = IS_STRING_EX;
}
if (Z_TYPE_P(value) != IS_STRING) {
zend_string *tmp = zval_get_string(value);
Z_STRVAL_P(str)[offset] = tmp->val[0];
zend_string_release(tmp);
} else {
Z_STRVAL_P(str)[offset] = Z_STRVAL_P(value)[0];
}
/*
* the value of an assignment to a string offset is undefined
T(result->u.var).var = &T->str_offset.str;
*/
zend_string_release(old_str);
if (result) {
zend_uchar c = (zend_uchar)Z_STRVAL_P(str)[offset];
if (CG(one_char_string)[c]) {
ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(str) + offset, 1, 0));
}
}
}
/* Utility Functions for Extensions */
static void zend_extension_statement_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->statement_handler) {
extension->statement_handler(op_array);
}
}
static void zend_extension_fcall_begin_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_begin_handler) {
extension->fcall_begin_handler(op_array);
}
}
static void zend_extension_fcall_end_handler(const zend_extension *extension, zend_op_array *op_array)
{
if (extension->fcall_end_handler) {
extension->fcall_end_handler(op_array);
}
}
static zend_always_inline HashTable *zend_get_target_symbol_table(zend_execute_data *execute_data, int fetch_type)
{
HashTable *ht;
if (EXPECTED(fetch_type == ZEND_FETCH_GLOBAL_LOCK) ||
EXPECTED(fetch_type == ZEND_FETCH_GLOBAL)) {
ht = &EG(symbol_table).ht;
} else if (EXPECTED(fetch_type == ZEND_FETCH_STATIC)) {
ZEND_ASSERT(EX(func)->op_array.static_variables != NULL);
ht = EX(func)->op_array.static_variables;
} else {
ZEND_ASSERT(fetch_type == ZEND_FETCH_LOCAL);
if (!EX(symbol_table)) {
zend_rebuild_symbol_table();
}
ht = &EX(symbol_table)->ht;
}
return ht;
}
static zend_always_inline zval *zend_fetch_dimension_address_inner(HashTable *ht, const zval *dim, int dim_type, int type)
{
zval *retval;
zend_string *offset_key;
zend_ulong hval;
try_again:
if (EXPECTED(Z_TYPE_P(dim) == IS_LONG)) {
hval = Z_LVAL_P(dim);
num_index:
retval = zend_hash_index_find(ht, hval);
if (retval == NULL) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE,"Undefined offset: " ZEND_ULONG_FMT, hval);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined offset: " ZEND_ULONG_FMT, hval);
/* break missing intentionally */
case BP_VAR_W:
retval = zend_hash_index_add_new(ht, hval, &EG(uninitialized_zval));
break;
}
}
} else if (EXPECTED(Z_TYPE_P(dim) == IS_STRING)) {
offset_key = Z_STR_P(dim);
if (dim_type != IS_CONST) {
if (ZEND_HANDLE_NUMERIC(offset_key, hval)) {
goto num_index;
}
}
str_index:
retval = zend_hash_find(ht, offset_key);
if (retval) {
/* support for $GLOBALS[...] */
if (UNEXPECTED(Z_TYPE_P(retval) == IS_INDIRECT)) {
retval = Z_INDIRECT_P(retval);
if (UNEXPECTED(Z_TYPE_P(retval) == IS_UNDEF)) {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_W:
ZVAL_NULL(retval);
break;
}
}
}
} else {
switch (type) {
case BP_VAR_R:
zend_error(E_NOTICE, "Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_UNSET:
case BP_VAR_IS:
retval = &EG(uninitialized_zval);
break;
case BP_VAR_RW:
zend_error(E_NOTICE,"Undefined index: %s", offset_key->val);
/* break missing intentionally */
case BP_VAR_W:
retval = zend_hash_add_new(ht, offset_key, &EG(uninitialized_zval));
break;
}
}
} else {
switch (Z_TYPE_P(dim)) {
case IS_NULL:
offset_key = STR_EMPTY_ALLOC();
goto str_index;
case IS_DOUBLE:
hval = zend_dval_to_lval(Z_DVAL_P(dim));
goto num_index;
case IS_RESOURCE:
zend_error(E_STRICT, "Resource ID#%pd used as offset, casting to integer (%pd)", Z_RES_HANDLE_P(dim), Z_RES_HANDLE_P(dim));
hval = Z_RES_HANDLE_P(dim);
goto num_index;
case IS_FALSE:
hval = 0;
goto num_index;
case IS_TRUE:
hval = 1;
goto num_index;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_again;
default:
zend_error(E_WARNING, "Illegal offset type");
retval = (type == BP_VAR_W || type == BP_VAR_RW) ?
&EG(error_zval) : &EG(uninitialized_zval);
}
}
return retval;
}
static zend_never_inline zend_long zend_check_string_offset(zval *dim, int type)
{
zend_long offset;
if (dim == NULL) {
zend_error_noreturn(E_ERROR, "[] operator not supported for strings");
}
try_again:
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch(Z_TYPE_P(dim)) {
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_UNSET) {
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
zend_error(E_NOTICE, "String offset cast occurred");
break;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_again;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = zval_get_long(dim);
} else {
offset = Z_LVAL_P(dim);
}
return offset;
}
static zend_always_inline zend_long zend_fetch_string_offset(zval *container, zval *dim, int type)
{
zend_long offset = zend_check_string_offset(dim, type);
if (Z_REFCOUNTED_P(container)) {
if (Z_REFCOUNT_P(container) > 1) {
Z_DELREF_P(container);
zval_copy_ctor_func(container);
}
Z_ADDREF_P(container);
}
return offset;
}
static zend_always_inline void zend_fetch_dimension_address(zval *result, zval *container, zval *dim, int dim_type, int type)
{
zval *retval;
try_again:
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
SEPARATE_ARRAY(container);
fetch_from_array:
if (dim == NULL) {
retval = zend_hash_next_index_insert(Z_ARRVAL_P(container), &EG(uninitialized_zval));
if (UNEXPECTED(retval == NULL)) {
zend_error(E_WARNING, "Cannot add element to the array as the next element is already occupied");
retval = &EG(error_zval);
}
} else {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
}
ZVAL_INDIRECT(result, retval);
} else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
if (type != BP_VAR_UNSET && UNEXPECTED(Z_STRLEN_P(container) == 0)) {
zval_ptr_dtor_nogc(container);
convert_to_array:
ZVAL_NEW_ARR(container);
zend_hash_init(Z_ARRVAL_P(container), 8, NULL, ZVAL_PTR_DTOR, 0);
goto fetch_from_array;
}
zend_check_string_offset(dim, type);
ZVAL_INDIRECT(result, NULL); /* wrong string offset */
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
if (UNEXPECTED(retval == &EG(uninitialized_zval))) {
zend_class_entry *ce = Z_OBJCE_P(container);
ZVAL_NULL(result);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ce->name->val);
} else if (EXPECTED(retval && Z_TYPE_P(retval) != IS_UNDEF)) {
if (!Z_ISREF_P(retval)) {
if (Z_REFCOUNTED_P(retval) &&
Z_REFCOUNT_P(retval) > 1) {
if (Z_TYPE_P(retval) != IS_OBJECT) {
Z_DELREF_P(retval);
ZVAL_DUP(result, retval);
retval = result;
} else {
ZVAL_COPY(result, retval);
retval = result;
}
}
if (Z_TYPE_P(retval) != IS_OBJECT) {
zend_class_entry *ce = Z_OBJCE_P(container);
zend_error(E_NOTICE, "Indirect modification of overloaded element of %s has no effect", ce->name->val);
}
}
if (result != retval) {
ZVAL_INDIRECT(result, retval);
}
} else {
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
} else if (EXPECTED(Z_TYPE_P(container) <= IS_FALSE)) {
if (UNEXPECTED(container == &EG(error_zval))) {
ZVAL_INDIRECT(result, &EG(error_zval));
} else if (type != BP_VAR_UNSET) {
goto convert_to_array;
} else {
/* for read-mode only */
ZVAL_NULL(result);
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
container = Z_REFVAL_P(container);
goto try_again;
} else {
if (type == BP_VAR_UNSET) {
zend_error(E_WARNING, "Cannot unset offset in a non-array variable");
ZVAL_NULL(result);
} else {
zend_error(E_WARNING, "Cannot use a scalar value as an array");
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
}
static zend_never_inline void zend_fetch_dimension_address_W(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_W);
}
static zend_never_inline void zend_fetch_dimension_address_RW(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_RW);
}
static zend_never_inline void zend_fetch_dimension_address_UNSET(zval *result, zval *container_ptr, zval *dim, int dim_type)
{
zend_fetch_dimension_address(result, container_ptr, dim, dim_type, BP_VAR_UNSET);
}
static zend_always_inline void zend_fetch_dimension_address_read(zval *result, zval *container, zval *dim, int dim_type, int type)
{
zval *retval;
try_again:
if (EXPECTED(Z_TYPE_P(container) == IS_ARRAY)) {
retval = zend_fetch_dimension_address_inner(Z_ARRVAL_P(container), dim, dim_type, type);
ZVAL_COPY(result, retval);
} else if (EXPECTED(Z_TYPE_P(container) == IS_STRING)) {
zend_long offset;
try_string_offset:
if (UNEXPECTED(Z_TYPE_P(dim) != IS_LONG)) {
switch(Z_TYPE_P(dim)) {
/* case IS_LONG: */
case IS_STRING:
if (IS_LONG == is_numeric_string(Z_STRVAL_P(dim), Z_STRLEN_P(dim), NULL, NULL, -1)) {
break;
}
if (type != BP_VAR_IS) {
zend_error(E_WARNING, "Illegal string offset '%s'", Z_STRVAL_P(dim));
}
break;
case IS_DOUBLE:
case IS_NULL:
case IS_FALSE:
case IS_TRUE:
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "String offset cast occurred");
}
break;
case IS_REFERENCE:
dim = Z_REFVAL_P(dim);
goto try_string_offset;
default:
zend_error(E_WARNING, "Illegal offset type");
break;
}
offset = zval_get_long(dim);
} else {
offset = Z_LVAL_P(dim);
}
if (UNEXPECTED(offset < 0) || UNEXPECTED(Z_STRLEN_P(container) <= (size_t)offset)) {
if (type != BP_VAR_IS) {
zend_error(E_NOTICE, "Uninitialized string offset: %pd", offset);
}
ZVAL_EMPTY_STRING(result);
} else {
zend_uchar c = (zend_uchar)Z_STRVAL_P(container)[offset];
if (CG(one_char_string)[c]) {
ZVAL_INTERNED_STR(result, CG(one_char_string)[c]);
} else {
ZVAL_NEW_STR(result, zend_string_init(Z_STRVAL_P(container) + offset, 1, 0));
}
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
if (!Z_OBJ_HT_P(container)->read_dimension) {
zend_error_noreturn(E_ERROR, "Cannot use object as array");
} else {
retval = Z_OBJ_HT_P(container)->read_dimension(container, dim, type, result);
ZEND_ASSERT(result != NULL);
if (retval) {
if (result != retval) {
ZVAL_COPY(result, retval);
}
} else {
ZVAL_NULL(result);
}
}
} else if (EXPECTED(Z_TYPE_P(container) == IS_REFERENCE)) {
container = Z_REFVAL_P(container);
goto try_again;
} else {
ZVAL_NULL(result);
}
}
static zend_never_inline void zend_fetch_dimension_address_read_R(zval *result, zval *container, zval *dim, int dim_type)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_R);
}
static zend_never_inline void zend_fetch_dimension_address_read_IS(zval *result, zval *container, zval *dim, int dim_type)
{
zend_fetch_dimension_address_read(result, container, dim, dim_type, BP_VAR_IS);
}
ZEND_API void zend_fetch_dimension_by_zval(zval *result, zval *container, zval *dim)
{
zend_fetch_dimension_address_read_R(result, container, dim, IS_TMP_VAR);
}
static zend_always_inline void zend_fetch_property_address(zval *result, zval *container, uint32_t container_op_type, zval *prop_ptr, uint32_t prop_op_type, void **cache_slot, int type)
{
if (container_op_type != IS_UNUSED && UNEXPECTED(Z_TYPE_P(container) != IS_OBJECT)) {
do {
if (container_op_type != IS_VAR && UNEXPECTED(container == &EG(error_zval))) {
ZVAL_INDIRECT(result, &EG(error_zval));
return;
}
if (Z_ISREF_P(container)) {
container = Z_REFVAL_P(container);
if (EXPECTED(Z_TYPE_P(container) == IS_OBJECT)) {
break;
}
}
/* this should modify object only if it's empty */
if (type != BP_VAR_UNSET &&
EXPECTED(Z_TYPE_P(container) <= IS_FALSE ||
(Z_TYPE_P(container) == IS_STRING && Z_STRLEN_P(container)==0))) {
zval_ptr_dtor_nogc(container);
object_init(container);
} else {
zend_error(E_WARNING, "Attempt to modify property of non-object");
ZVAL_INDIRECT(result, &EG(error_zval));
return;
}
} while (0);
}
if (prop_op_type == IS_CONST &&
EXPECTED(Z_OBJCE_P(container) == CACHED_PTR_EX(cache_slot))) {
uint32_t prop_offset = (uint32_t)(intptr_t)CACHED_PTR_EX(cache_slot + 1);
zend_object *zobj = Z_OBJ_P(container);
zval *retval;
if (EXPECTED(prop_offset != ZEND_DYNAMIC_PROPERTY_OFFSET)) {
retval = OBJ_PROP(zobj, prop_offset);
if (EXPECTED(Z_TYPE_P(retval) != IS_UNDEF)) {
ZVAL_INDIRECT(result, retval);
return;
}
} else if (EXPECTED(zobj->properties != NULL)) {
retval = zend_hash_find(zobj->properties, Z_STR_P(prop_ptr));
if (EXPECTED(retval)) {
ZVAL_INDIRECT(result, retval);
return;
}
}
}
if (EXPECTED(Z_OBJ_HT_P(container)->get_property_ptr_ptr)) {
zval *ptr = Z_OBJ_HT_P(container)->get_property_ptr_ptr(container, prop_ptr, type, cache_slot);
if (NULL == ptr) {
if (Z_OBJ_HT_P(container)->read_property &&
(ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result)) != NULL) {
if (ptr != result) {
ZVAL_INDIRECT(result, ptr);
}
} else {
zend_error_noreturn(E_ERROR, "Cannot access undefined property for object with overloaded property access");
}
} else {
ZVAL_INDIRECT(result, ptr);
}
} else if (EXPECTED(Z_OBJ_HT_P(container)->read_property)) {
zval *ptr = Z_OBJ_HT_P(container)->read_property(container, prop_ptr, type, cache_slot, result);
if (ptr != result) {
ZVAL_INDIRECT(result, ptr);
}
} else {
zend_error(E_WARNING, "This object doesn't support property references");
ZVAL_INDIRECT(result, &EG(error_zval));
}
}
static inline zend_brk_cont_element* zend_brk_cont(int nest_levels, int array_offset, const zend_op_array *op_array, const zend_execute_data *execute_data)
{
int original_nest_levels = nest_levels;
zend_brk_cont_element *jmp_to;
do {
if (array_offset==-1) {
zend_error_noreturn(E_ERROR, "Cannot break/continue %d level%s", original_nest_levels, (original_nest_levels == 1) ? "" : "s");
}
jmp_to = &op_array->brk_cont_array[array_offset];
if (nest_levels>1) {
zend_op *brk_opline = &op_array->opcodes[jmp_to->brk];
if (brk_opline->opcode == ZEND_FREE) {
if (!(brk_opline->extended_value & EXT_TYPE_FREE_ON_RETURN)) {
zval_ptr_dtor_nogc(EX_VAR(brk_opline->op1.var));
}
}
}
array_offset = jmp_to->parent;
} while (--nest_levels > 0);
return jmp_to;
}
#if ZEND_INTENSIVE_DEBUGGING
#define CHECK_SYMBOL_TABLES() \
zend_hash_apply(&EG(symbol_table), zend_check_symbol); \
if (&EG(symbol_table)!=EX(symbol_table)) { \
zend_hash_apply(EX(symbol_table), zend_check_symbol); \
}
static int zend_check_symbol(zval *pz)
{
if (Z_TYPE_P(pz) == IS_INDIRECT) {
pz = Z_INDIRECT_P(pz);
}
if (Z_TYPE_P(pz) > 10) {
fprintf(stderr, "Warning! %x has invalid type!\n", *pz);
/* See http://support.microsoft.com/kb/190351 */
#ifdef PHP_WIN32
fflush(stderr);
#endif
} else if (Z_TYPE_P(pz) == IS_ARRAY) {
zend_hash_apply(Z_ARRVAL_P(pz), zend_check_symbol);
} else if (Z_TYPE_P(pz) == IS_OBJECT) {
/* OBJ-TBI - doesn't support new object model! */
zend_hash_apply(Z_OBJPROP_P(pz), zend_check_symbol);
}
return 0;
}
#else
#define CHECK_SYMBOL_TABLES()
#endif
ZEND_API opcode_handler_t *zend_opcode_handlers;
ZEND_API void execute_internal(zend_execute_data *execute_data, zval *return_value)
{
execute_data->func->internal_function.handler(execute_data, return_value);
}
ZEND_API void zend_clean_and_cache_symbol_table(zend_array *symbol_table) /* {{{ */
{
if (EG(symtable_cache_ptr) >= EG(symtable_cache_limit)) {
zend_array_destroy(&symbol_table->ht);
efree_size(symbol_table, sizeof(zend_array));
} else {
/* clean before putting into the cache, since clean
could call dtors, which could use cached hash */
zend_symtable_clean(&symbol_table->ht);
*(++EG(symtable_cache_ptr)) = symbol_table;
}
}
/* }}} */
static zend_always_inline void i_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
{
if (EXPECTED(EX(func)->op_array.last_var > 0)) {
zval *cv = EX_VAR_NUM(0);
zval *end = cv + EX(func)->op_array.last_var;
do {
zval_ptr_dtor(cv);
cv++;
} while (cv != end);
}
}
/* }}} */
void zend_free_compiled_variables(zend_execute_data *execute_data) /* {{{ */
{
i_free_compiled_variables(execute_data);
}
/* }}} */
/*
* Stack Frame Layout (the whole stack frame is allocated at once)
* ==================
*
* +========================================+
* EG(current_execute_data) -> | zend_execute_data |
* +----------------------------------------+
* EX_CV_NUM(0) ---------> | VAR[0] = ARG[1] |
* | ... |
* | VAR[op_array->num_args-1] = ARG[N] |
* | ... |
* | VAR[op_array->last_var-1] |
* | VAR[op_array->last_var] = TMP[0] |
* | ... |
* | VAR[op_array->last_var+op_array->T-1] |
* | ARG[N+1] (extra_args) |
* | ... |
* +----------------------------------------+
*/
static zend_always_inline void i_init_func_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
uint32_t first_extra_arg, num_args;
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
/* Handle arguments */
first_extra_arg = op_array->num_args;
num_args = EX_NUM_ARGS();
if (UNEXPECTED(num_args > first_extra_arg)) {
zval *end, *src, *dst;
uint32_t type_flags = 0;
if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += first_extra_arg;
}
/* move extra args into separate array after all CV and TMP vars */
end = EX_VAR_NUM(first_extra_arg - 1);
src = end + (num_args - first_extra_arg);
dst = src + (op_array->last_var + op_array->T - first_extra_arg);
if (EXPECTED(src != dst)) {
do {
type_flags |= Z_TYPE_INFO_P(src);
ZVAL_COPY_VALUE(dst, src);
ZVAL_UNDEF(src);
src--;
dst--;
} while (src != end);
} else {
do {
type_flags |= Z_TYPE_INFO_P(src);
src--;
} while (src != end);
}
ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += num_args;
}
/* Initialize CV variables (skip arguments) */
if (EXPECTED((int)num_args < op_array->last_var)) {
zval *var = EX_VAR_NUM(num_args);
zval *end = EX_VAR_NUM(op_array->last_var);
do {
ZVAL_UNDEF(var);
var++;
} while (var != end);
}
if (op_array->this_var != (uint32_t)-1 && EXPECTED(Z_OBJ(EX(This)))) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
GC_REFCOUNT(Z_OBJ(EX(This)))++;
}
if (UNEXPECTED(!op_array->run_time_cache)) {
op_array->run_time_cache = zend_arena_calloc(&CG(arena), op_array->last_cache_slot, sizeof(void*));
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
static zend_always_inline void i_init_code_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
zend_attach_symbol_table(execute_data);
if (op_array->this_var != (uint32_t)-1 && EXPECTED(Z_OBJ(EX(This)))) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
GC_REFCOUNT(Z_OBJ(EX(This)))++;
}
if (!op_array->run_time_cache) {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
static zend_always_inline void i_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
ZEND_ASSERT(EX(func) == (zend_function*)op_array);
EX(opline) = op_array->opcodes;
EX(call) = NULL;
EX(return_value) = return_value;
if (UNEXPECTED(EX(symbol_table) != NULL)) {
zend_attach_symbol_table(execute_data);
} else {
uint32_t first_extra_arg, num_args;
/* Handle arguments */
first_extra_arg = op_array->num_args;
num_args = EX_NUM_ARGS();
if (UNEXPECTED(num_args > first_extra_arg)) {
zval *end, *src, *dst;
uint32_t type_flags = 0;
if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += first_extra_arg;
}
/* move extra args into separate array after all CV and TMP vars */
end = EX_VAR_NUM(first_extra_arg - 1);
src = end + (num_args - first_extra_arg);
dst = src + (op_array->last_var + op_array->T - first_extra_arg);
if (EXPECTED(src != dst)) {
do {
type_flags |= Z_TYPE_INFO_P(src);
ZVAL_COPY_VALUE(dst, src);
ZVAL_UNDEF(src);
src--;
dst--;
} while (src != end);
} else {
do {
type_flags |= Z_TYPE_INFO_P(src);
src--;
} while (src != end);
}
ZEND_ADD_CALL_FLAG(execute_data, ((type_flags >> Z_TYPE_FLAGS_SHIFT) & IS_TYPE_REFCOUNTED));
} else if (EXPECTED((op_array->fn_flags & ZEND_ACC_HAS_TYPE_HINTS) == 0)) {
/* Skip useless ZEND_RECV and ZEND_RECV_INIT opcodes */
EX(opline) += num_args;
}
/* Initialize CV variables (skip arguments) */
if (EXPECTED((int)num_args < op_array->last_var)) {
zval *var = EX_VAR_NUM(num_args);
zval *end = EX_VAR_NUM(op_array->last_var);
do {
ZVAL_UNDEF(var);
var++;
} while (var != end);
}
}
if (op_array->this_var != (uint32_t)-1 && EXPECTED(Z_OBJ(EX(This)))) {
ZVAL_OBJ(EX_VAR(op_array->this_var), Z_OBJ(EX(This)));
GC_REFCOUNT(Z_OBJ(EX(This)))++;
}
if (!op_array->run_time_cache) {
if (op_array->function_name) {
op_array->run_time_cache = zend_arena_calloc(&CG(arena), op_array->last_cache_slot, sizeof(void*));
} else {
op_array->run_time_cache = ecalloc(op_array->last_cache_slot, sizeof(void*));
}
}
EX_LOAD_RUN_TIME_CACHE(op_array);
EX_LOAD_LITERALS(op_array);
EG(current_execute_data) = execute_data;
}
/* }}} */
ZEND_API zend_execute_data *zend_create_generator_execute_data(zend_execute_data *call, zend_op_array *op_array, zval *return_value) /* {{{ */
{
/*
* Normally the execute_data is allocated on the VM stack (because it does
* not actually do any allocation and thus is faster). For generators
* though this behavior would be suboptimal, because the (rather large)
* structure would have to be copied back and forth every time execution is
* suspended or resumed. That's why for generators the execution context
* is allocated using a separate VM stack, thus allowing to save and
* restore it simply by replacing a pointer.
*/
zend_execute_data *execute_data;
uint32_t num_args = ZEND_CALL_NUM_ARGS(call);
size_t stack_size = (ZEND_CALL_FRAME_SLOT + MAX(op_array->last_var + op_array->T, num_args)) * sizeof(zval);
EG(vm_stack) = zend_vm_stack_new_page(
EXPECTED(stack_size < ZEND_VM_STACK_FREE_PAGE_SIZE) ?
ZEND_VM_STACK_PAGE_SIZE :
ZEND_VM_STACK_PAGE_ALIGNED_SIZE(stack_size),
NULL);
EG(vm_stack_top) = EG(vm_stack)->top;
EG(vm_stack_end) = EG(vm_stack)->end;
execute_data = zend_vm_stack_push_call_frame(
ZEND_CALL_TOP_FUNCTION,
(zend_function*)op_array,
num_args,
call->called_scope,
Z_OBJ(call->This),
NULL);
EX_NUM_ARGS() = num_args;
/* copy arguments */
if (num_args > 0) {
zval *arg_src = ZEND_CALL_ARG(call, 1);
zval *arg_dst = ZEND_CALL_ARG(execute_data, 1);
uint32_t i;
for (i = 0; i < num_args; i++) {
ZVAL_COPY_VALUE(arg_dst + i, arg_src + i);
}
}
EX(symbol_table) = NULL;
i_init_func_execute_data(execute_data, op_array, return_value);
return execute_data;
}
/* }}} */
ZEND_API void zend_init_execute_data(zend_execute_data *execute_data, zend_op_array *op_array, zval *return_value) /* {{{ */
{
EX(prev_execute_data) = EG(current_execute_data);
i_init_execute_data(execute_data, op_array, return_value);
}
/* }}} */
static zend_always_inline zend_bool zend_is_by_ref_func_arg_fetch(const zend_op *opline, zend_execute_data *call) /* {{{ */
{
uint32_t arg_num = opline->extended_value & ZEND_FETCH_ARG_MASK;
return ARG_SHOULD_BE_SENT_BY_REF(call->func, arg_num);
}
/* }}} */
static zend_execute_data *zend_vm_stack_copy_call_frame(zend_execute_data *call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
zend_execute_data *new_call;
int used_stack = (EG(vm_stack_top) - (zval*)call) + additional_args;
/* copy call frame into new stack segment */
new_call = zend_vm_stack_extend(used_stack * sizeof(zval));
*new_call = *call;
if (passed_args) {
zval *src = ZEND_CALL_ARG(call, 1);
zval *dst = ZEND_CALL_ARG(new_call, 1);
do {
ZVAL_COPY_VALUE(dst, src);
passed_args--;
src++;
dst++;
} while (passed_args);
}
/* delete old call_frame from previous stack segment */
EG(vm_stack)->prev->top = (zval*)call;
/* delete previous stack segment if it becames empty */
if (UNEXPECTED(EG(vm_stack)->prev->top == ZEND_VM_STACK_ELEMETS(EG(vm_stack)->prev))) {
zend_vm_stack r = EG(vm_stack)->prev;
EG(vm_stack)->prev = r->prev;
efree(r);
}
return new_call;
}
/* }}} */
static zend_always_inline void zend_vm_stack_extend_call_frame(zend_execute_data **call, uint32_t passed_args, uint32_t additional_args) /* {{{ */
{
if (EXPECTED(EG(vm_stack_end) - EG(vm_stack_top) > additional_args)) {
EG(vm_stack_top) += additional_args;
} else {
*call = zend_vm_stack_copy_call_frame(*call, passed_args, additional_args);
}
}
/* }}} */
#define ZEND_VM_NEXT_OPCODE() \
CHECK_SYMBOL_TABLES() \
ZEND_VM_INC_OPCODE(); \
ZEND_VM_CONTINUE()
#define ZEND_VM_SET_OPCODE(new_op) \
CHECK_SYMBOL_TABLES() \
OPLINE = new_op
#define ZEND_VM_SET_RELATIVE_OPCODE(opline, offset) \
ZEND_VM_SET_OPCODE(ZEND_OFFSET_TO_OPLINE(opline, offset))
#define ZEND_VM_JMP(new_op) \
if (EXPECTED(!EG(exception))) { \
ZEND_VM_SET_OPCODE(new_op); \
} else { \
LOAD_OPLINE(); \
} \
ZEND_VM_CONTINUE()
#define ZEND_VM_INC_OPCODE() \
OPLINE++
#ifdef __GNUC__
# define ZEND_VM_GUARD(name) __asm__("#" #name)
#else
# define ZEND_VM_GUARD(name)
#endif
#include "zend_vm_execute.h"
ZEND_API int zend_set_user_opcode_handler(zend_uchar opcode, user_opcode_handler_t handler)
{
if (opcode != ZEND_USER_OPCODE) {
if (handler == NULL) {
/* restore the original handler */
zend_user_opcodes[opcode] = opcode;
} else {
zend_user_opcodes[opcode] = ZEND_USER_OPCODE;
}
zend_user_opcode_handlers[opcode] = handler;
return SUCCESS;
}
return FAILURE;
}
ZEND_API user_opcode_handler_t zend_get_user_opcode_handler(zend_uchar opcode)
{
return zend_user_opcode_handlers[opcode];
}
ZEND_API zval *zend_get_zval_ptr(int op_type, const znode_op *node, const zend_execute_data *execute_data, zend_free_op *should_free, int type) {
return get_zval_ptr(op_type, *node, execute_data, should_free, type);
}
/*
* Local variables:
* tab-width: 4
* c-basic-offset: 4
* indent-tabs-mode: t
* End:
*/
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