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zend_compile.c
5394 lines (4657 loc) · 180 KB
/
zend_compile.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2009 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_exceptions.h"
#include "tsrm_virtual_cwd.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);
ZEND_API zend_op_array *(*zend_compile_string)(zval *source_string, char *filename 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);
if (property_info->doc_comment) {
property_info->doc_comment = estrndup(property_info->doc_comment, property_info->doc_comment_len);
}
}
/* }}} */
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);
if (property_info->doc_comment) {
efree(property_info->doc_comment);
}
}
/* }}} */
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, const 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_text));
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;
#ifdef ZEND_MULTIBYTE
/* must be binary safe */
result->value.str.val = (char *) safe_emalloc(result->value.str.len, 1, 1);
result->value.str.val[0] = '\0';
sprintf(result->value.str.val+1, "%s%s%s", name, filename, char_pos_buf);
#else
zend_spprintf(&result->value.str.val, 0, "%c%s%s%s", '\0', name, filename, char_pos_buf);
#endif /* ZEND_MULTIBYTE */
result->type = IS_STRING;
Z_SET_REFCOUNT_P(result, 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;
}
/* }}} */
ZEND_API int zend_auto_global_disable_jit(const 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) /* {{{ */
{
Z_TYPE(CG(declarables).ticks) = IS_LONG;
Z_LVAL(CG(declarables).ticks) = 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(in_compilation) = 0;
CG(start_lineno) = 0;
CG(current_namespace) = NULL;
CG(in_namespace) = 0;
CG(has_bracketed_namespaces) = 0;
CG(current_import) = NULL;
init_compiler_declarables(TSRMLS_C);
zend_hash_apply(CG(auto_globals), (apply_func_t) zend_auto_global_arm TSRMLS_CC);
zend_stack_init(&CG(labels_stack));
CG(labels) = NULL;
#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 */
}
/* }}} */
ZEND_API void file_handle_dtor(zend_file_handle *fh) /* {{{ */
{
TSRMLS_FETCH();
zend_file_handle_dtor(fh TSRMLS_CC);
}
/* }}} */
void init_compiler(TSRMLS_D) /* {{{ */
{
CG(active_op_array) = NULL;
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 *)) 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));
zend_stack_destroy(&CG(labels_stack));
#ifdef ZEND_MULTIBYTE
if (CG(script_encoding_list)) {
efree(CG(script_encoding_list));
}
#endif /* ZEND_MULTIBYTE */
}
/* }}} */
ZEND_API char *zend_set_compiled_filename(const 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)++ * ZEND_MM_ALIGNED_SIZE(sizeof(temp_variable));
}
/* }}} */
static int lookup_cv(zend_op_array *op_array, char* name, int name_len) /* {{{ */
{
int i = 0;
ulong hash_value = zend_inline_hash_func(name, name_len+1);
while (i < op_array->last_var) {
if (op_array->vars[i].hash_value == hash_value &&
op_array->vars[i].name_len == name_len &&
strcmp(op_array->vars[i].name, name) == 0) {
efree(name);
return i;
}
i++;
}
i = op_array->last_var;
op_array->last_var++;
if (op_array->last_var > op_array->size_var) {
op_array->size_var += 16; /* FIXME */
op_array->vars = erealloc(op_array->vars, op_array->size_var*sizeof(zend_compiled_variable));
}
op_array->vars[i].name = name; /* estrndup(name, name_len); */
op_array->vars[i].name_len = name_len;
op_array->vars[i].hash_value = hash_value;
return i;
}
/* }}} */
void zend_do_binary_op(zend_uchar op, znode *result, const znode *op1, const 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, const 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, const 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, const znode *op1, const znode *op2 TSRMLS_DC) /* {{{ */
{
int last_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline = get_next_op(CG(active_op_array) TSRMLS_CC);
if (last_op_number > 0) {
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number-1];
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;
return;
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;
return;
default:
break;
}
}
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;
}
/* }}} */
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 (varname->op_type == IS_CONST) {
if (Z_TYPE(varname->u.constant) != IS_STRING) {
convert_to_string(&varname->u.constant);
}
if (!zend_is_auto_global(varname->u.constant.value.str.val, varname->u.constant.value.str.len TSRMLS_CC) &&
!(varname->u.constant.value.str.len == (sizeof("this")-1) &&
!memcmp(varname->u.constant.value.str.val, "this", sizeof("this"))) &&
(CG(active_op_array)->last == 0 ||
CG(active_op_array)->opcodes[CG(active_op_array)->last-1].opcode != ZEND_BEGIN_SILENCE)) {
result->op_type = IS_CV;
result->u.var = lookup_cv(CG(active_op_array), varname->u.constant.value.str.val, varname->u.constant.value.str.len);
result->u.EA.type = 0;
return;
}
}
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 *result, znode *class_name TSRMLS_DC) /* {{{ */
{
znode class_node;
zend_llist *fetch_list_ptr;
zend_llist_element *le;
zend_op *opline_ptr;
zend_op opline;
zend_do_fetch_class(&class_node, class_name TSRMLS_CC);
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
if (result->op_type == IS_CV) {
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_FETCH_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.op_type = IS_CONST;
opline.op1.u.constant.type = IS_STRING;
opline.op1.u.constant.value.str.val = estrdup(CG(active_op_array)->vars[result->u.var].name);
opline.op1.u.constant.value.str.len = CG(active_op_array)->vars[result->u.var].name_len;
SET_UNUSED(opline.op2);
opline.op2 = class_node;
opline.op2.u.EA.type = ZEND_FETCH_STATIC_MEMBER;
*result = opline.result;
zend_llist_add_element(fetch_list_ptr, &opline);
} else {
le = fetch_list_ptr->head;
opline_ptr = (zend_op *)le->data;
if (opline_ptr->opcode != ZEND_FETCH_W && opline_ptr->op1.op_type == IS_CV) {
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_FETCH_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.op_type = IS_CONST;
opline.op1.u.constant.type = IS_STRING;
opline.op1.u.constant.value.str.val = estrdup(CG(active_op_array)->vars[opline_ptr->op1.u.var].name);
opline.op1.u.constant.value.str.len = CG(active_op_array)->vars[opline_ptr->op1.u.var].name_len;
SET_UNUSED(opline.op2);
opline.op2 = class_node;
opline.op2.u.EA.type = ZEND_FETCH_STATIC_MEMBER;
opline_ptr->op1 = opline.result;
zend_llist_prepend_element(fetch_list_ptr, &opline);
} else {
opline_ptr->op2 = class_node;
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, const znode *parent, const 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, const znode *parent, const znode *offset TSRMLS_DC) /* {{{ */
{
fetch_array_dim(result, parent, offset TSRMLS_CC);
}
/* }}} */
void zend_do_print(znode *result, const 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(const 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(const znode *function_name, znode *modifiers, const znode *body TSRMLS_DC) /* {{{ */
{
char *method_type;
if (CG(active_class_entry)->ce_flags & ZEND_ACC_INTERFACE) {
Z_LVAL(modifiers->u.constant) |= 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 (Z_LVAL(body->u.constant) == 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(const 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, const znode *value TSRMLS_DC) /* {{{ */
{
int last_op_number;
zend_op *opline;
if (value->op_type == IS_CV) {
zend_llist *fetch_list_ptr;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
if (fetch_list_ptr && fetch_list_ptr->head) {
opline = (zend_op *)fetch_list_ptr->head->data;
if (opline->opcode == ZEND_FETCH_DIM_W &&
opline->op1.op_type == IS_CV &&
opline->op1.u.var == value->u.var) {
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_FETCH_R;
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.op_type = IS_CONST;
ZVAL_STRINGL(&opline->op1.u.constant,
CG(active_op_array)->vars[value->u.var].name,
CG(active_op_array)->vars[value->u.var].name_len, 1);
SET_UNUSED(opline->op2);
opline->op2.u.EA.type = ZEND_FETCH_LOCAL;
value = &opline->result;
}
}
}
zend_do_end_variable_parse(variable, BP_VAR_W, 0 TSRMLS_CC);
last_op_number = get_next_op_number(CG(active_op_array));
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
if (variable->op_type == IS_CV) {
if (variable->u.var == CG(active_op_array)->this_var) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
}
} else if (variable->op_type == IS_VAR) {
int n = 0;
while (last_op_number - n > 0) {
zend_op *last_op;
last_op = &CG(active_op_array)->opcodes[last_op_number-n-1];
if (last_op->result.op_type == IS_VAR &&
last_op->result.u.var == variable->u.var) {
if (last_op->opcode == ZEND_FETCH_OBJ_W) {
if (n > 0) {
int opline_no = (opline-CG(active_op_array)->opcodes)/sizeof(*opline);
*opline = *last_op;
MAKE_NOP(last_op);
/* last_op = opline; */
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
/* get_next_op can realloc, we need to move last_op */
last_op = &CG(active_op_array)->opcodes[opline_no];
}
last_op->opcode = ZEND_ASSIGN_OBJ;
zend_do_op_data(opline, value TSRMLS_CC);
SET_UNUSED(opline->result);
*result = last_op->result;
return;
} else if (last_op->opcode == ZEND_FETCH_DIM_W) {
if (n > 0) {
int opline_no = (opline-CG(active_op_array)->opcodes)/sizeof(*opline);
*opline = *last_op;
MAKE_NOP(last_op);
/* last_op = opline; */
/* TBFixed: this can realloc opcodes, leaving last_op pointing wrong */
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
/* get_next_op can realloc, we need to move last_op */
last_op = &CG(active_op_array)->opcodes[opline_no];
}
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;
return;
} else if (opline_is_fetch_this(last_op TSRMLS_CC)) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
} else {
break;
}
}
n++;
}
}
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(const 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, const znode *lvar, const znode *rvar TSRMLS_DC) /* {{{ */
{
zend_op *opline;
if (lvar->op_type == IS_CV) {
if (lvar->u.var == CG(active_op_array)->this_var) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
}
} else if (lvar->op_type == IS_VAR) {
int last_op_number = get_next_op_number(CG(active_op_array));
if (last_op_number > 0) {
opline = &CG(active_op_array)->opcodes[last_op_number-1];
if (opline_is_fetch_this(opline TSRMLS_CC)) {
zend_error(E_COMPILE_ERROR, "Cannot re-assign $this");
}
}
}
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_ASSIGN_REF;
if (zend_is_function_or_method_call(rvar)) {
opline->extended_value = ZEND_RETURNS_FUNCTION;
} else if (rvar->u.EA.type & ZEND_PARSED_NEW) {
opline->extended_value = ZEND_RETURNS_NEW;
} 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->start = get_next_op_number(CG(active_op_array));
brk_cont_element->parent = parent;
}
/* }}} */
static inline void do_end_loop(int cont_addr, int has_loop_var TSRMLS_DC) /* {{{ */
{
if (!has_loop_var) {
/* The start fileld is used to free temporary variables in case of exceptions.
* We won't try to free something of we don't have loop variable.
*/
CG(active_op_array)->brk_cont_array[CG(active_op_array)->current_brk_cont].start = -1;
}
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(const 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(const znode *while_token, const 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, 0 TSRMLS_CC);
DEC_BPC(CG(active_op_array));
}
/* }}} */
void zend_do_for_cond(const 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(const znode *cond_start, const 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(const 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, 0 TSRMLS_CC);
DEC_BPC(CG(active_op_array));
}
/* }}} */
void zend_do_pre_incdec(znode *result, const znode *op1, zend_uchar op TSRMLS_DC) /* {{{ */
{
int last_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline;
if (last_op_number > 0) {
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number-1];
if (last_op->opcode == ZEND_FETCH_OBJ_RW) {
last_op->opcode = (op==ZEND_PRE_INC)?ZEND_PRE_INC_OBJ:ZEND_PRE_DEC_OBJ;
last_op->result.op_type = IS_VAR;
last_op->result.u.EA.type = 0;
last_op->result.u.var = get_temporary_variable(CG(active_op_array));
*result = last_op->result;
return;
}
}
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
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, const znode *op1, zend_uchar op TSRMLS_DC) /* {{{ */
{
int last_op_number = get_next_op_number(CG(active_op_array));
zend_op *opline;
if (last_op_number > 0) {
zend_op *last_op = &CG(active_op_array)->opcodes[last_op_number-1];
if (last_op->opcode == ZEND_FETCH_OBJ_RW) {
last_op->opcode = (op==ZEND_POST_INC)?ZEND_POST_INC_OBJ:ZEND_POST_DEC_OBJ;
last_op->result.op_type = IS_TMP_VAR;
last_op->result.u.var = get_temporary_variable(CG(active_op_array));
*result = last_op->result;
return;
}
}
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
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(const 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(const 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(const 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(znode *variable, int type, int arg_offset TSRMLS_DC) /* {{{ */
{
zend_llist *fetch_list_ptr;
zend_llist_element *le;
zend_op *opline = NULL;
zend_op *opline_ptr;
zend_uint this_var = -1;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
le = fetch_list_ptr->head;
/* TODO: $foo->x->y->z = 1 should fetch "x" and "y" for R or RW, not just W */
if (le) {
opline_ptr = (zend_op *)le->data;
if (opline_is_fetch_this(opline_ptr TSRMLS_CC)) {
/* convert to FETCH_?(this) into IS_CV */
if (CG(active_op_array)->last == 0 ||
CG(active_op_array)->opcodes[CG(active_op_array)->last-1].opcode != ZEND_BEGIN_SILENCE) {
this_var = opline_ptr->result.u.var;
if (CG(active_op_array)->this_var == -1) {
CG(active_op_array)->this_var = lookup_cv(CG(active_op_array), Z_STRVAL(opline_ptr->op1.u.constant), Z_STRLEN(opline_ptr->op1.u.constant));