forked from php/php-src
/
zend_compile.c
3871 lines (3151 loc) · 121 KB
/
zend_compile.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2004 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> |
+----------------------------------------------------------------------+
*/
/* $Id$ */
#include <zend_language_parser.h>
#include "zend.h"
#include "zend_compile.h"
#include "zend_constants.h"
#include "zend_llist.h"
#include "zend_API.h"
#include "zend_fast_cache.h"
#ifdef ZEND_MULTIBYTE
#include "zend_multibyte.h"
#endif /* ZEND_MULTIBYTE */
ZEND_API zend_op_array *(*zend_compile_file)(zend_file_handle *file_handle, int type TSRMLS_DC);
#ifndef ZTS
ZEND_API zend_compiler_globals compiler_globals;
ZEND_API zend_executor_globals executor_globals;
#endif
static void zend_duplicate_property_info(zend_property_info *property_info)
{
property_info->name = estrndup(property_info->name, property_info->name_length);
}
static void zend_duplicate_property_info_internal(zend_property_info *property_info)
{
property_info->name = zend_strndup(property_info->name, property_info->name_length);
}
static void zend_destroy_property_info(zend_property_info *property_info)
{
efree(property_info->name);
}
static void zend_destroy_property_info_internal(zend_property_info *property_info)
{
free(property_info->name);
}
static void build_runtime_defined_function_key(zval *result, char *name, int name_length TSRMLS_DC)
{
char char_pos_buf[32];
uint char_pos_len;
char *filename;
char_pos_len = zend_sprintf(char_pos_buf, "%p", LANG_SCNG(_yy_last_accepting_cpos));
if (CG(active_op_array)->filename) {
filename = CG(active_op_array)->filename;
} else {
filename = "-";
}
/* NULL, name length, filename length, last accepting char position length */
result->value.str.len = 1+name_length+strlen(filename)+char_pos_len;
result->value.str.val = (char *) emalloc(result->value.str.len+1);
#ifdef ZEND_MULTIBYTE
/* must be binary safe */
result->value.str.val[0] = '\0';
memcpy(result->value.str.val+1, name, name_length);
sprintf(result->value.str.val+1+name_length, "%s%s", filename, char_pos_buf);
#else
sprintf(result->value.str.val, "%c%s%s%s", '\0', name, filename, char_pos_buf);
#endif /* ZEND_MULTIBYTE */
result->type = IS_STRING;
result->refcount = 1;
}
int zend_auto_global_arm(zend_auto_global *auto_global TSRMLS_DC)
{
auto_global->armed = (auto_global->auto_global_callback ? 1 : 0);
return 0;
}
int zend_auto_global_disable_jit(char *varname, zend_uint varname_length TSRMLS_DC)
{
zend_auto_global *auto_global;
if (zend_hash_find(CG(auto_globals), varname, varname_length+1, (void **) &auto_global)==FAILURE) {
return FAILURE;
}
auto_global->armed = 0;
return SUCCESS;
}
static void init_compiler_declarables(TSRMLS_D)
{
CG(declarables).ticks.type = IS_LONG;
CG(declarables).ticks.value.lval = 0;
}
void zend_init_compiler_data_structures(TSRMLS_D)
{
zend_stack_init(&CG(bp_stack));
zend_stack_init(&CG(function_call_stack));
zend_stack_init(&CG(switch_cond_stack));
zend_stack_init(&CG(foreach_copy_stack));
zend_stack_init(&CG(object_stack));
zend_stack_init(&CG(declare_stack));
CG(active_class_entry) = NULL;
zend_llist_init(&CG(list_llist), sizeof(list_llist_element), NULL, 0);
zend_llist_init(&CG(dimension_llist), sizeof(int), NULL, 0);
zend_stack_init(&CG(list_stack));
CG(handle_op_arrays) = 1;
CG(in_compilation) = 0;
CG(start_lineno) = 0;
init_compiler_declarables(TSRMLS_C);
zend_hash_apply(CG(auto_globals), (apply_func_t) zend_auto_global_arm TSRMLS_CC);
#ifdef ZEND_MULTIBYTE
CG(script_encoding_list) = NULL;
CG(script_encoding_list_size) = 0;
CG(internal_encoding) = NULL;
CG(encoding_detector) = NULL;
CG(encoding_converter) = NULL;
CG(encoding_oddlen) = NULL;
#endif /* ZEND_MULTIBYTE */
}
void init_compiler(TSRMLS_D)
{
zend_init_compiler_data_structures(TSRMLS_C);
zend_init_rsrc_list(TSRMLS_C);
zend_hash_init(&CG(filenames_table), 5, NULL, (dtor_func_t) free_estring, 0);
zend_llist_init(&CG(open_files), sizeof(zend_file_handle), (void (*)(void *)) zend_file_handle_dtor, 0);
CG(unclean_shutdown) = 0;
}
void shutdown_compiler(TSRMLS_D)
{
zend_stack_destroy(&CG(bp_stack));
zend_stack_destroy(&CG(function_call_stack));
zend_stack_destroy(&CG(switch_cond_stack));
zend_stack_destroy(&CG(foreach_copy_stack));
zend_stack_destroy(&CG(object_stack));
zend_stack_destroy(&CG(declare_stack));
zend_stack_destroy(&CG(list_stack));
zend_hash_destroy(&CG(filenames_table));
zend_llist_destroy(&CG(open_files));
#ifdef ZEND_MULTIBYTE
if (CG(script_encoding_list)) {
efree(CG(script_encoding_list));
}
#endif /* ZEND_MULTIBYTE */
}
ZEND_API char *zend_set_compiled_filename(char *new_compiled_filename TSRMLS_DC)
{
char **pp, *p;
int length = strlen(new_compiled_filename);
if (zend_hash_find(&CG(filenames_table), new_compiled_filename, length+1, (void **) &pp)==SUCCESS) {
CG(compiled_filename) = *pp;
return *pp;
}
p = estrndup(new_compiled_filename, length);
zend_hash_update(&CG(filenames_table), new_compiled_filename, length+1, &p, sizeof(char *), (void **) &pp);
CG(compiled_filename) = p;
return p;
}
ZEND_API void zend_restore_compiled_filename(char *original_compiled_filename TSRMLS_DC)
{
CG(compiled_filename) = original_compiled_filename;
}
ZEND_API char *zend_get_compiled_filename(TSRMLS_D)
{
return CG(compiled_filename);
}
ZEND_API int zend_get_compiled_lineno(TSRMLS_D)
{
return CG(zend_lineno);
}
ZEND_API zend_bool zend_is_compiling(TSRMLS_D)
{
return CG(in_compilation);
}
static zend_uint get_temporary_variable(zend_op_array *op_array)
{
return (op_array->T)++ * sizeof(temp_variable);
}
void zend_do_binary_op(zend_uchar op, znode *result, znode *op1, znode *op2 TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = op;
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
opline->op1 = *op1;
opline->op2 = *op2;
*result = opline->result;
}
void zend_do_unary_op(zend_uchar op, znode *result, znode *op1 TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = op;
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
opline->op1 = *op1;
*result = opline->result;
SET_UNUSED(opline->op2);
}
#define MAKE_NOP(opline) { opline->opcode = ZEND_NOP; memset(&opline->result,0,sizeof(znode)); memset(&opline->op1,0,sizeof(znode)); memset(&opline->op2,0,sizeof(znode)); opline->result.op_type=opline->op1.op_type=opline->op2.op_type=IS_UNUSED; }
static void zend_do_op_data(zend_op *data_op, znode *value TSRMLS_DC)
{
data_op->opcode = ZEND_OP_DATA;
data_op->op1 = *value;
SET_UNUSED(data_op->op2);
}
void zend_do_binary_assign_op(zend_uchar op, znode *result, znode *op1, znode *op2 TSRMLS_DC)
{
int last_op_number = get_next_op_number(CG(active_op_array))-1;
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number];
switch (last_op->opcode) {
case ZEND_FETCH_OBJ_RW:
last_op->opcode = op;
last_op->extended_value = ZEND_ASSIGN_OBJ;
zend_do_op_data(opline, op2 TSRMLS_CC);
SET_UNUSED(opline->result);
*result = last_op->result;
break;
case ZEND_FETCH_DIM_RW:
last_op->opcode = op;
last_op->extended_value = ZEND_ASSIGN_DIM;
zend_do_op_data(opline, op2 TSRMLS_CC);
opline->op2.u.var = get_temporary_variable(CG(active_op_array));
opline->op2.u.EA.type = 0;
opline->op2.op_type = IS_VAR;
SET_UNUSED(opline->result);
*result = last_op->result;
break;
default:
opline->opcode = op;
opline->op1 = *op1;
opline->op2 = *op2;
opline->result.op_type = IS_VAR;
opline->result.u.EA.type = 0;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
break;
}
}
void fetch_simple_variable_ex(znode *result, znode *varname, int bp, zend_uchar op TSRMLS_DC)
{
zend_op opline;
zend_op *opline_ptr;
zend_llist *fetch_list_ptr;
if (bp) {
opline_ptr = &opline;
init_op(opline_ptr TSRMLS_CC);
} else {
opline_ptr = get_next_op(CG(active_op_array) TSRMLS_CC);
}
opline_ptr->opcode = op;
opline_ptr->result.op_type = IS_VAR;
opline_ptr->result.u.EA.type = 0;
opline_ptr->result.u.var = get_temporary_variable(CG(active_op_array));
opline_ptr->op1 = *varname;
*result = opline_ptr->result;
SET_UNUSED(opline_ptr->op2);
opline_ptr->op2.u.EA.type = ZEND_FETCH_LOCAL;
if (varname->op_type == IS_CONST && varname->u.constant.type == IS_STRING) {
if (zend_is_auto_global(varname->u.constant.value.str.val, varname->u.constant.value.str.len TSRMLS_CC)) {
opline_ptr->op2.u.EA.type = ZEND_FETCH_GLOBAL;
}
}
if (bp) {
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
zend_llist_add_element(fetch_list_ptr, opline_ptr);
}
}
void fetch_simple_variable(znode *result, znode *varname, int bp TSRMLS_DC)
{
/* the default mode must be Write, since fetch_simple_variable() is used to define function arguments */
fetch_simple_variable_ex(result, varname, bp, ZEND_FETCH_W TSRMLS_CC);
}
void zend_do_fetch_static_member(znode *class_znode TSRMLS_DC)
{
zend_llist *fetch_list_ptr;
zend_llist_element *le;
zend_op *opline_ptr;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
le = fetch_list_ptr->head;
opline_ptr = (zend_op *)le->data;
opline_ptr->op2 = *class_znode;
opline_ptr->op2.u.EA.type = ZEND_FETCH_STATIC_MEMBER;
}
void fetch_array_begin(znode *result, znode *varname, znode *first_dim TSRMLS_DC)
{
fetch_simple_variable(result, varname, 1 TSRMLS_CC);
fetch_array_dim(result, result, first_dim TSRMLS_CC);
}
void fetch_array_dim(znode *result, znode *parent, znode *dim TSRMLS_DC)
{
zend_op opline;
zend_llist *fetch_list_ptr;
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_FETCH_DIM_W; /* the backpatching routine assumes W */
opline.result.op_type = IS_VAR;
opline.result.u.EA.type = 0;
opline.result.u.var = get_temporary_variable(CG(active_op_array));
opline.op1 = *parent;
opline.op2 = *dim;
opline.extended_value = ZEND_FETCH_STANDARD;
*result = opline.result;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
zend_llist_add_element(fetch_list_ptr, &opline);
}
void fetch_string_offset(znode *result, znode *parent, znode *offset TSRMLS_DC)
{
fetch_array_dim(result, parent, offset TSRMLS_CC);
}
void zend_do_print(znode *result, znode *arg TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
opline->opcode = ZEND_PRINT;
opline->op1 = *arg;
SET_UNUSED(opline->op2);
*result = opline->result;
}
void zend_do_echo(znode *arg TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ECHO;
opline->op1 = *arg;
SET_UNUSED(opline->op2);
}
void zend_do_abstract_method(znode *function_name, znode *modifiers, znode *body TSRMLS_DC)
{
char *method_type;
if (CG(active_class_entry)->ce_flags & ZEND_ACC_INTERFACE) {
modifiers->u.constant.value.lval |= ZEND_ACC_ABSTRACT;
method_type = "Interface";
} else {
method_type = "Abstract";
}
if (modifiers->u.constant.value.lval & ZEND_ACC_ABSTRACT) {
if(modifiers->u.constant.value.lval & ZEND_ACC_PRIVATE) {
zend_error(E_COMPILE_ERROR, "%s function %s::%s() cannot be declared private", method_type, CG(active_class_entry)->name, function_name->u.constant.value.str.val);
}
if (body->u.constant.value.lval == ZEND_ACC_ABSTRACT) {
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_RAISE_ABSTRACT_ERROR;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
} else {
/* we had code in the function body */
zend_error(E_COMPILE_ERROR, "%s function %s::%s() cannot contain body", method_type, CG(active_class_entry)->name, function_name->u.constant.value.str.val);
}
} else {
if (body->u.constant.value.lval == ZEND_ACC_ABSTRACT) {
zend_error(E_COMPILE_ERROR, "Non-abstract method %s::%s() must contain body", CG(active_class_entry)->name, function_name->u.constant.value.str.val);
}
}
}
static zend_bool opline_is_fetch_this(zend_op *opline TSRMLS_DC)
{
if ((opline->opcode == ZEND_FETCH_W) && (opline->op1.op_type == IS_CONST)
&& (opline->op1.u.constant.type == IS_STRING)
&& (opline->op1.u.constant.value.str.len == (sizeof("this")-1))
&& !memcmp(opline->op1.u.constant.value.str.val, "this", sizeof("this"))) {
return 1;
} else {
return 0;
}
}
void zend_do_assign(znode *result, znode *variable, znode *value TSRMLS_DC)
{
int last_op_number = get_next_op_number(CG(active_op_array))-1;
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number];
if (last_op->opcode == ZEND_FETCH_OBJ_W) {
last_op->opcode = ZEND_ASSIGN_OBJ;
zend_do_op_data(opline, value TSRMLS_CC);
SET_UNUSED(opline->result);
*result = last_op->result;
} else if (last_op->opcode == ZEND_FETCH_DIM_W) {
last_op->opcode = ZEND_ASSIGN_DIM;
zend_do_op_data(opline, value TSRMLS_CC);
opline->op2.u.var = get_temporary_variable(CG(active_op_array));
opline->op2.u.EA.type = 0;
opline->op2.op_type = IS_VAR;
SET_UNUSED(opline->result);
*result = last_op->result;
} else {
if (opline_is_fetch_this(last_op TSRMLS_CC)) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
}
opline->opcode = ZEND_ASSIGN;
opline->op1 = *variable;
opline->op2 = *value;
opline->result.op_type = IS_VAR;
opline->result.u.EA.type = 0;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
}
}
static inline zend_bool zend_is_function_or_method_call(znode *variable)
{
zend_uint type = variable->u.EA.type;
return ((type & ZEND_PARSED_METHOD_CALL) || (type == ZEND_PARSED_FUNCTION_CALL));
}
void zend_do_assign_ref(znode *result, znode *lvar, znode *rvar TSRMLS_DC)
{
int last_op_number = get_next_op_number(CG(active_op_array))-1;
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number];
opline->opcode = ZEND_ASSIGN_REF;
if (opline_is_fetch_this(last_op TSRMLS_CC)) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
}
if (zend_is_function_or_method_call(rvar)) {
opline->extended_value = ZEND_RETURNS_FUNCTION;
} else {
opline->extended_value = 0;
}
if (result) {
opline->result.op_type = IS_VAR;
opline->result.u.EA.type = 0;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
} else {
/* SET_UNUSED(opline->result); */
opline->result.u.EA.type |= EXT_TYPE_UNUSED;
}
opline->op1 = *lvar;
opline->op2 = *rvar;
}
static inline void do_begin_loop(TSRMLS_D)
{
zend_brk_cont_element *brk_cont_element;
int parent;
parent = CG(active_op_array)->current_brk_cont;
CG(active_op_array)->current_brk_cont = CG(active_op_array)->last_brk_cont;
brk_cont_element = get_next_brk_cont_element(CG(active_op_array));
brk_cont_element->parent = parent;
}
static inline void do_end_loop(int cont_addr TSRMLS_DC)
{
CG(active_op_array)->brk_cont_array[CG(active_op_array)->current_brk_cont].cont = cont_addr;
CG(active_op_array)->brk_cont_array[CG(active_op_array)->current_brk_cont].brk = get_next_op_number(CG(active_op_array));
CG(active_op_array)->current_brk_cont = CG(active_op_array)->brk_cont_array[CG(active_op_array)->current_brk_cont].parent;
}
void zend_do_while_cond(znode *expr, znode *close_bracket_token TSRMLS_DC)
{
int while_cond_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_JMPZ;
opline->op1 = *expr;
close_bracket_token->u.opline_num = while_cond_op_number;
SET_UNUSED(opline->op2);
do_begin_loop(TSRMLS_C);
INC_BPC(CG(active_op_array));
}
void zend_do_while_end(znode *while_token, znode *close_bracket_token TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
/* add unconditional jump */
opline->opcode = ZEND_JMP;
opline->op1.u.opline_num = while_token->u.opline_num;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
/* update while's conditional jmp */
CG(active_op_array)->opcodes[close_bracket_token->u.opline_num].op2.u.opline_num = get_next_op_number(CG(active_op_array));
do_end_loop(while_token->u.opline_num TSRMLS_CC);
DEC_BPC(CG(active_op_array));
}
void zend_do_for_cond(znode *expr, znode *second_semicolon_token TSRMLS_DC)
{
int for_cond_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_JMPZNZ;
opline->op1 = *expr; /* the conditional expression */
second_semicolon_token->u.opline_num = for_cond_op_number;
SET_UNUSED(opline->op2);
}
void zend_do_for_before_statement(znode *cond_start, znode *second_semicolon_token TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_JMP;
opline->op1.u.opline_num = cond_start->u.opline_num;
CG(active_op_array)->opcodes[second_semicolon_token->u.opline_num].extended_value = get_next_op_number(CG(active_op_array));
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
do_begin_loop(TSRMLS_C);
INC_BPC(CG(active_op_array));
}
void zend_do_for_end(znode *second_semicolon_token TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_JMP;
opline->op1.u.opline_num = second_semicolon_token->u.opline_num+1;
CG(active_op_array)->opcodes[second_semicolon_token->u.opline_num].op2.u.opline_num = get_next_op_number(CG(active_op_array));
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
do_end_loop(second_semicolon_token->u.opline_num+1 TSRMLS_CC);
DEC_BPC(CG(active_op_array));
}
void zend_do_pre_incdec(znode *result, znode *op1, zend_uchar op TSRMLS_DC)
{
int last_op_number = get_next_op_number(CG(active_op_array))-1;
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number];
if (last_op->opcode == ZEND_FETCH_OBJ_RW) {
opline->opcode = (op==ZEND_PRE_INC)?ZEND_PRE_INC_OBJ:ZEND_PRE_DEC_OBJ;
opline->op1 = last_op->op1;
opline->op2 = last_op->op2;
MAKE_NOP(last_op);
} else {
opline->opcode = op;
opline->op1 = *op1;
SET_UNUSED(opline->op2);
}
opline->result.op_type = IS_VAR;
opline->result.u.EA.type = 0;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
}
void zend_do_post_incdec(znode *result, znode *op1, zend_uchar op TSRMLS_DC)
{
int last_op_number = get_next_op_number(CG(active_op_array))-1;
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number];
if (last_op->opcode == ZEND_FETCH_OBJ_RW) {
opline->opcode = (op==ZEND_POST_INC)?ZEND_POST_INC_OBJ:ZEND_POST_DEC_OBJ;
opline->op1 = last_op->op1;
opline->op2 = last_op->op2;
MAKE_NOP(last_op);
} else {
opline->opcode = op;
opline->op1 = *op1;
SET_UNUSED(opline->op2);
}
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
}
void zend_do_if_cond(znode *cond, znode *closing_bracket_token TSRMLS_DC)
{
int if_cond_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_JMPZ;
opline->op1 = *cond;
closing_bracket_token->u.opline_num = if_cond_op_number;
SET_UNUSED(opline->op2);
INC_BPC(CG(active_op_array));
}
void zend_do_if_after_statement(znode *closing_bracket_token, unsigned char initialize TSRMLS_DC)
{
int if_end_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
zend_llist *jmp_list_ptr;
opline->opcode = ZEND_JMP;
/* save for backpatching */
if (initialize) {
zend_llist jmp_list;
zend_llist_init(&jmp_list, sizeof(int), NULL, 0);
zend_stack_push(&CG(bp_stack), (void *) &jmp_list, sizeof(zend_llist));
}
zend_stack_top(&CG(bp_stack), (void **) &jmp_list_ptr);
zend_llist_add_element(jmp_list_ptr, &if_end_op_number);
CG(active_op_array)->opcodes[closing_bracket_token->u.opline_num].op2.u.opline_num = if_end_op_number+1;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
}
void zend_do_if_end(TSRMLS_D)
{
int next_op_number = get_next_op_number(CG(active_op_array));
zend_llist *jmp_list_ptr;
zend_llist_element *le;
zend_stack_top(&CG(bp_stack), (void **) &jmp_list_ptr);
for (le=jmp_list_ptr->head; le; le = le->next) {
CG(active_op_array)->opcodes[*((int *) le->data)].op1.u.opline_num = next_op_number;
}
zend_llist_destroy(jmp_list_ptr);
zend_stack_del_top(&CG(bp_stack));
DEC_BPC(CG(active_op_array));
}
void zend_check_writable_variable(znode *variable)
{
zend_uint type = variable->u.EA.type;
if (type & ZEND_PARSED_METHOD_CALL) {
zend_error(E_COMPILE_ERROR, "Can't use method return value in write context");
}
if (type == ZEND_PARSED_FUNCTION_CALL) {
zend_error(E_COMPILE_ERROR, "Can't use function return value in write context");
}
}
void zend_do_begin_variable_parse(TSRMLS_D)
{
zend_llist fetch_list;
zend_llist_init(&fetch_list, sizeof(zend_op), NULL, 0);
zend_stack_push(&CG(bp_stack), (void *) &fetch_list, sizeof(zend_llist));
}
void zend_do_end_variable_parse(int type, int arg_offset TSRMLS_DC)
{
zend_llist *fetch_list_ptr;
zend_llist_element *le;
zend_op *opline, *opline_ptr=NULL;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
le = fetch_list_ptr->head;
if (le) {
opline_ptr = (zend_op *)le->data;
if (opline_is_fetch_this(opline_ptr TSRMLS_CC)) {
CG(active_op_array)->uses_this = 1;
}
while (1) {
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
memcpy(opline, opline_ptr, sizeof(zend_op));
switch (type) {
case BP_VAR_R:
if (opline->opcode == ZEND_FETCH_DIM_W && opline->op2.op_type == IS_UNUSED) {
zend_error(E_COMPILE_ERROR, "Cannot use [] for reading");
}
opline->opcode -= 3;
break;
case BP_VAR_W:
break;
case BP_VAR_RW:
opline->opcode += 3;
break;
case BP_VAR_IS:
if (opline->opcode == ZEND_FETCH_DIM_W && opline->op2.op_type == IS_UNUSED) {
zend_error(E_COMPILE_ERROR, "Cannot use [] for reading");
}
opline->opcode += 6; /* 3+3 */
break;
case BP_VAR_FUNC_ARG:
opline->opcode += 9; /* 3+3+3 */
opline->extended_value = arg_offset;
break;
case BP_VAR_UNSET:
if (opline->opcode == ZEND_FETCH_DIM_W && opline->op2.op_type == IS_UNUSED) {
zend_error(E_COMPILE_ERROR, "Cannot use [] for unsetting");
}
opline->opcode += 12; /* 3+3+3+3 */
break;
}
le = le->next;
if (le == NULL) break;
opline_ptr = (zend_op *)le->data;
}
}
zend_llist_destroy(fetch_list_ptr);
zend_stack_del_top(&CG(bp_stack));
}
void zend_do_init_string(znode *result TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_INIT_STRING;
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
}
void zend_do_add_char(znode *result, znode *op1, znode *op2 TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ADD_CHAR;
opline->op1 = *op1;
opline->op2 = *op2;
opline->op2.op_type = IS_CONST;
opline->result = opline->op1;
*result = opline->result;
}
void zend_do_add_string(znode *result, znode *op1, znode *op2 TSRMLS_DC)
{
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ADD_STRING;
opline->op1 = *op1;
opline->op2 = *op2;
opline->op2.op_type = IS_CONST;
opline->result = opline->op1;
*result = opline->result;
}
void zend_do_add_variable(znode *result, znode *op1, znode *op2 TSRMLS_DC)
{
zend_op *opline;
if (op1->op_type == IS_CONST) {
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_INIT_STRING;
opline->result.op_type = IS_TMP_VAR;
opline->result.u.var = get_temporary_variable(CG(active_op_array));
*result = opline->result;
SET_UNUSED(opline->op1);
SET_UNUSED(opline->op2);
if (op1->u.constant.value.str.len>0) {
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ADD_STRING;
opline->result = *result;
opline->op1 = *result;
opline->op2 = *op1;
opline->result = opline->op1;
} else {
zval_dtor(&op1->u.constant);
}
} else {
*result = *op1;
}
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ADD_VAR;
opline->result = *result;
opline->op1 = *result;
opline->op2 = *op2;
*result = opline->result;
}
static void zend_lowercase_znode_if_const(znode *z)
{
if (z->op_type == IS_CONST) {
zend_str_tolower(z->u.constant.value.str.val, z->u.constant.value.str.len);
}
}
void zend_do_free(znode *op1 TSRMLS_DC)
{
if (op1->op_type==IS_TMP_VAR) {
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_FREE;
opline->op1 = *op1;
SET_UNUSED(opline->op2);
} else if (op1->op_type==IS_VAR) {
zend_op *opline = &CG(active_op_array)->opcodes[CG(active_op_array)->last-1];
while (opline->opcode == ZEND_END_SILENCE || opline->opcode == ZEND_EXT_FCALL_END || opline->opcode == ZEND_OP_DATA) {
opline--;
}
if (opline->result.op_type == op1->op_type
&& opline->result.u.var == op1->u.var) {
opline->result.u.EA.type |= EXT_TYPE_UNUSED;
} else {
while (opline>CG(active_op_array)->opcodes) {
/* This should be an object instantiation
* Find JMP_NO_CTOR, mark the preceding ASSIGN and the
* proceeding INIT_FCALL_BY_NAME as unused
*/
if (opline->opcode == ZEND_JMP_NO_CTOR &&
opline->op1.u.var == op1->u.var) {
opline->op1.u.EA.type |= EXT_TYPE_UNUSED;
(opline-1)->result.u.EA.type |= EXT_TYPE_UNUSED;
(opline+1)->op1.u.EA.type |= EXT_TYPE_UNUSED;
break;
} else if (opline->opcode == ZEND_FETCH_DIM_R
&& opline->op1.op_type == IS_VAR
&& opline->op1.u.var == op1->u.var) {
/* This should the end of a list() construct
* Mark its result as unused
*/
opline->extended_value = ZEND_FETCH_STANDARD;
break;
} else if (opline->result.op_type==IS_VAR
&& opline->result.u.var == op1->u.var) {
break;
}
opline--;
}
}
} else if (op1->op_type == IS_CONST) {
zval_dtor(&op1->u.constant);
}
}
int zend_do_verify_access_types(znode *current_access_type, znode *new_modifier)
{
if ((current_access_type->u.constant.value.lval & ZEND_ACC_PPP_MASK)
&& (new_modifier->u.constant.value.lval & ZEND_ACC_PPP_MASK)
&& ((current_access_type->u.constant.value.lval & ZEND_ACC_PPP_MASK) != (new_modifier->u.constant.value.lval & ZEND_ACC_PPP_MASK))) {
zend_error(E_COMPILE_ERROR, "Multiple access type modifiers are not allowed");
}
if (((current_access_type->u.constant.value.lval | new_modifier->u.constant.value.lval) & (ZEND_ACC_ABSTRACT | ZEND_ACC_FINAL)) == (ZEND_ACC_ABSTRACT | ZEND_ACC_FINAL)) {
zend_error(E_COMPILE_ERROR, "Cannot use the final modifier on an abstract class member");
}
return (current_access_type->u.constant.value.lval | new_modifier->u.constant.value.lval);
}
void zend_do_begin_function_declaration(znode *function_token, znode *function_name, int is_method, int return_reference, znode *fn_flags_znode TSRMLS_DC)
{
zend_op_array op_array;
char *name = function_name->u.constant.value.str.val;
int name_len = function_name->u.constant.value.str.len;
int function_begin_line = function_token->u.opline_num;
zend_uint fn_flags;
char *lcname;
if (is_method) {
if (CG(active_class_entry)->ce_flags & ZEND_ACC_INTERFACE) {
if (!(fn_flags_znode->u.constant.value.lval & ZEND_ACC_PUBLIC)) {
zend_error(E_COMPILE_ERROR, "Access type for interface method %s::%s() must be omitted or declared public", CG(active_class_entry)->name, function_name->u.constant.value.str.val);
}
fn_flags_znode->u.constant.value.lval |= ZEND_ACC_ABSTRACT; /* propagates to the rest of the parser */
}
fn_flags = fn_flags_znode->u.constant.value.lval; /* must be done *after* the above check */
} else {
fn_flags = 0;
}
function_token->u.op_array = CG(active_op_array);
lcname = zend_str_tolower_dup(name, name_len);
init_op_array(&op_array, ZEND_USER_FUNCTION, INITIAL_OP_ARRAY_SIZE TSRMLS_CC);
op_array.function_name = name;
op_array.return_reference = return_reference;
op_array.fn_flags = fn_flags;
op_array.pass_rest_by_reference = 0;
op_array.scope = is_method?CG(active_class_entry):NULL;
op_array.prototype = NULL;
op_array.line_start = zend_get_compiled_lineno(TSRMLS_C);
if (is_method) {
char *short_class_name = CG(active_class_entry)->name;
int short_class_name_length = CG(active_class_entry)->name_length;
if (zend_hash_add(&CG(active_class_entry)->function_table, lcname, name_len+1, &op_array, sizeof(zend_op_array), (void **) &CG(active_op_array)) == FAILURE) {
zend_op_array *child_op_array, *parent_op_array;
if (CG(active_class_entry)->parent
&& (zend_hash_find(&CG(active_class_entry)->function_table, name, name_len+1, (void **) &child_op_array) == SUCCESS)
&& (zend_hash_find(&CG(active_class_entry)->parent->function_table, name, name_len+1, (void **) &parent_op_array) == SUCCESS)
&& (child_op_array == parent_op_array)) {
zend_hash_update(&CG(active_class_entry)->function_table, name, name_len+1, &op_array, sizeof(zend_op_array), (void **) &CG(active_op_array));
} else {
efree(lcname);
zend_error(E_COMPILE_ERROR, "Cannot redeclare %s::%s()", CG(active_class_entry)->name, name);
}
}
if (fn_flags & ZEND_ACC_ABSTRACT) {