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zend_compile.c
7276 lines (6334 loc) · 246 KB
/
zend_compile.c
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/*
+----------------------------------------------------------------------+
| Zend Engine |
+----------------------------------------------------------------------+
| Copyright (c) 1998-2013 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"
#include "zend_multibyte.h"
#include "zend_language_scanner.h"
#define CONSTANT_EX(op_array, op) \
(op_array)->literals[op].constant
#define CONSTANT(op) \
CONSTANT_EX(CG(active_op_array), op)
#define SET_NODE(target, src) do { \
target ## _type = (src)->op_type; \
if ((src)->op_type == IS_CONST) { \
target.constant = zend_add_literal(CG(active_op_array), &(src)->u.constant TSRMLS_CC); \
} else { \
target = (src)->u.op; \
} \
} while (0)
#define GET_NODE(target, src) do { \
(target)->op_type = src ## _type; \
if ((target)->op_type == IS_CONST) { \
(target)->u.constant = CONSTANT(src.constant); \
} else { \
(target)->u.op = src; \
(target)->EA = 0; \
} \
} while (0)
#define COPY_NODE(target, src) do { \
target ## _type = src ## _type; \
target = src; \
} while (0)
#define CALCULATE_LITERAL_HASH(num) do { \
zval *c = &CONSTANT(num); \
Z_HASH_P(c) = str_hash(Z_STRVAL_P(c), Z_STRLEN_P(c)); \
} while (0)
#define GET_CACHE_SLOT(literal) do { \
CG(active_op_array)->literals[literal].cache_slot = CG(active_op_array)->last_cache_slot++; \
if ((CG(active_op_array)->fn_flags & ZEND_ACC_INTERACTIVE) && CG(active_op_array)->run_time_cache) { \
CG(active_op_array)->run_time_cache = erealloc(CG(active_op_array)->run_time_cache, CG(active_op_array)->last_cache_slot * sizeof(void*)); \
CG(active_op_array)->run_time_cache[CG(active_op_array)->last_cache_slot - 1] = NULL; \
} \
} while (0)
#define POLYMORPHIC_CACHE_SLOT_SIZE 2
#define GET_POLYMORPHIC_CACHE_SLOT(literal) do { \
CG(active_op_array)->literals[literal].cache_slot = CG(active_op_array)->last_cache_slot; \
CG(active_op_array)->last_cache_slot += POLYMORPHIC_CACHE_SLOT_SIZE; \
if ((CG(active_op_array)->fn_flags & ZEND_ACC_INTERACTIVE) && CG(active_op_array)->run_time_cache) { \
CG(active_op_array)->run_time_cache = erealloc(CG(active_op_array)->run_time_cache, CG(active_op_array)->last_cache_slot * sizeof(void*)); \
CG(active_op_array)->run_time_cache[CG(active_op_array)->last_cache_slot - 1] = NULL; \
CG(active_op_array)->run_time_cache[CG(active_op_array)->last_cache_slot - 2] = NULL; \
} \
} while (0)
#define FREE_POLYMORPHIC_CACHE_SLOT(literal) do { \
if (CG(active_op_array)->literals[literal].cache_slot != -1 && \
CG(active_op_array)->literals[literal].cache_slot == \
CG(active_op_array)->last_cache_slot - POLYMORPHIC_CACHE_SLOT_SIZE) { \
CG(active_op_array)->literals[literal].cache_slot = -1; \
CG(active_op_array)->last_cache_slot -= POLYMORPHIC_CACHE_SLOT_SIZE; \
} \
} while (0)
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 = str_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 = str_strndup(property_info->name, property_info->name_length);
}
/* }}} */
static void zend_destroy_property_info(zend_property_info *property_info) /* {{{ */
{
str_efree(property_info->name);
if (property_info->doc_comment) {
efree((char*)property_info->doc_comment);
}
}
/* }}} */
static void zend_destroy_property_info_internal(zend_property_info *property_info) /* {{{ */
{
str_free((char*)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;
const 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 */
Z_STRLEN_P(result) = 1+name_length+strlen(filename)+char_pos_len;
/* must be binary safe */
Z_STRVAL_P(result) = (char *) safe_emalloc(Z_STRLEN_P(result), 1, 1);
Z_STRVAL_P(result)[0] = '\0';
sprintf(Z_STRVAL_P(result)+1, "%s%s%s", name, filename, char_pos_buf);
result->type = IS_STRING;
Z_SET_REFCOUNT_P(result, 1);
}
/* }}} */
static void init_compiler_declarables(TSRMLS_D) /* {{{ */
{
Z_TYPE(CG(declarables).ticks) = IS_LONG;
Z_LVAL(CG(declarables).ticks) = 0;
}
/* }}} */
void zend_init_compiler_context(TSRMLS_D) /* {{{ */
{
CG(context).opcodes_size = (CG(active_op_array)->fn_flags & ZEND_ACC_INTERACTIVE) ? INITIAL_INTERACTIVE_OP_ARRAY_SIZE : INITIAL_OP_ARRAY_SIZE;
CG(context).vars_size = 0;
CG(context).literals_size = 0;
CG(context).current_brk_cont = -1;
CG(context).backpatch_count = 0;
CG(context).nested_calls = 0;
CG(context).used_stack = 0;
CG(context).in_finally = 0;
CG(context).labels = NULL;
}
/* }}} */
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_stack_init(&CG(context_stack));
CG(encoding_declared) = 0;
}
/* }}} */
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;
memset(&CG(context), 0, sizeof(CG(context)));
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(context_stack));
}
/* }}} */
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 (zend_uint)(zend_uintptr_t)EX_TMP_VAR_NUM(0, (op_array->T)++);
}
/* }}} */
static int lookup_cv(zend_op_array *op_array, char* name, int name_len, ulong hash TSRMLS_DC) /* {{{ */
{
int i = 0;
ulong hash_value = hash ? hash : zend_inline_hash_func(name, name_len+1);
while (i < op_array->last_var) {
if (op_array->vars[i].name == name ||
(op_array->vars[i].hash_value == hash_value &&
op_array->vars[i].name_len == name_len &&
memcmp(op_array->vars[i].name, name, name_len) == 0)) {
str_efree(name);
return i;
}
i++;
}
i = op_array->last_var;
op_array->last_var++;
if (op_array->last_var > CG(context).vars_size) {
CG(context).vars_size += 16; /* FIXME */
op_array->vars = erealloc(op_array->vars, CG(context).vars_size * sizeof(zend_compiled_variable));
}
op_array->vars[i].name = zend_new_interned_string(name, name_len + 1, 1 TSRMLS_CC);
op_array->vars[i].name_len = name_len;
op_array->vars[i].hash_value = hash_value;
return i;
}
/* }}} */
void zend_del_literal(zend_op_array *op_array, int n) /* {{{ */
{
zval_dtor(&CONSTANT_EX(op_array, n));
if (n + 1 == op_array->last_literal) {
op_array->last_literal--;
} else {
Z_TYPE(CONSTANT_EX(op_array, n)) = IS_NULL;
}
}
/* }}} */
/* Common part of zend_add_literal and zend_append_individual_literal */
static inline void zend_insert_literal(zend_op_array *op_array, const zval *zv, int literal_position TSRMLS_DC) /* {{{ */
{
if (Z_TYPE_P(zv) == IS_STRING || Z_TYPE_P(zv) == IS_CONSTANT) {
zval *z = (zval*)zv;
Z_STRVAL_P(z) = (char*)zend_new_interned_string(Z_STRVAL_P(zv), Z_STRLEN_P(zv) + 1, 1 TSRMLS_CC);
}
CONSTANT_EX(op_array, literal_position) = *zv;
Z_SET_REFCOUNT(CONSTANT_EX(op_array, literal_position), 2);
Z_SET_ISREF(CONSTANT_EX(op_array, literal_position));
op_array->literals[literal_position].hash_value = 0;
op_array->literals[literal_position].cache_slot = -1;
}
/* }}} */
/* Is used while compiling a function, using the context to keep track
of an approximate size to avoid to relocate to often.
Literals are truncated to actual size in the second compiler pass (pass_two()). */
int zend_add_literal(zend_op_array *op_array, const zval *zv TSRMLS_DC) /* {{{ */
{
int i = op_array->last_literal;
op_array->last_literal++;
if (i >= CG(context).literals_size) {
while (i >= CG(context).literals_size) {
CG(context).literals_size += 16; /* FIXME */
}
op_array->literals = (zend_literal*)erealloc(op_array->literals, CG(context).literals_size * sizeof(zend_literal));
}
zend_insert_literal(op_array, zv, i TSRMLS_CC);
return i;
}
/* }}} */
/* Is used after normal compilation to append an additional literal.
Allocation is done precisely here. */
int zend_append_individual_literal(zend_op_array *op_array, const zval *zv TSRMLS_DC) /* {{{ */
{
int i = op_array->last_literal;
op_array->last_literal++;
op_array->literals = (zend_literal*)erealloc(op_array->literals, (i + 1) * sizeof(zend_literal));
zend_insert_literal(op_array, zv, i TSRMLS_CC);
return i;
}
/* }}} */
int zend_add_func_name_literal(zend_op_array *op_array, const zval *zv TSRMLS_DC) /* {{{ */
{
int ret;
char *lc_name;
zval c;
int lc_literal;
if (op_array->last_literal > 0 &&
&op_array->literals[op_array->last_literal - 1].constant == zv &&
op_array->literals[op_array->last_literal - 1].cache_slot == -1) {
/* we already have function name as last literal (do nothing) */
ret = op_array->last_literal - 1;
} else {
ret = zend_add_literal(op_array, zv TSRMLS_CC);
}
lc_name = zend_str_tolower_dup(Z_STRVAL_P(zv), Z_STRLEN_P(zv));
ZVAL_STRINGL(&c, lc_name, Z_STRLEN_P(zv), 0);
lc_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(lc_literal);
return ret;
}
/* }}} */
int zend_add_ns_func_name_literal(zend_op_array *op_array, const zval *zv TSRMLS_DC) /* {{{ */
{
int ret;
char *lc_name;
const char *ns_separator;
int lc_len;
zval c;
int lc_literal;
if (op_array->last_literal > 0 &&
&op_array->literals[op_array->last_literal - 1].constant == zv &&
op_array->literals[op_array->last_literal - 1].cache_slot == -1) {
/* we already have function name as last literal (do nothing) */
ret = op_array->last_literal - 1;
} else {
ret = zend_add_literal(op_array, zv TSRMLS_CC);
}
lc_name = zend_str_tolower_dup(Z_STRVAL_P(zv), Z_STRLEN_P(zv));
ZVAL_STRINGL(&c, lc_name, Z_STRLEN_P(zv), 0);
lc_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(lc_literal);
ns_separator = (const char*)zend_memrchr(Z_STRVAL_P(zv), '\\', Z_STRLEN_P(zv)) + 1;
lc_len = Z_STRLEN_P(zv) - (ns_separator - Z_STRVAL_P(zv));
lc_name = zend_str_tolower_dup(ns_separator, lc_len);
ZVAL_STRINGL(&c, lc_name, lc_len, 0);
lc_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(lc_literal);
return ret;
}
/* }}} */
int zend_add_class_name_literal(zend_op_array *op_array, const zval *zv TSRMLS_DC) /* {{{ */
{
int ret;
char *lc_name;
int lc_len;
zval c;
int lc_literal;
if (op_array->last_literal > 0 &&
&op_array->literals[op_array->last_literal - 1].constant == zv &&
op_array->literals[op_array->last_literal - 1].cache_slot == -1) {
/* we already have function name as last literal (do nothing) */
ret = op_array->last_literal - 1;
} else {
ret = zend_add_literal(op_array, zv TSRMLS_CC);
}
if (Z_STRVAL_P(zv)[0] == '\\') {
lc_len = Z_STRLEN_P(zv) - 1;
lc_name = zend_str_tolower_dup(Z_STRVAL_P(zv) + 1, lc_len);
} else {
lc_len = Z_STRLEN_P(zv);
lc_name = zend_str_tolower_dup(Z_STRVAL_P(zv), lc_len);
}
ZVAL_STRINGL(&c, lc_name, lc_len, 0);
lc_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(lc_literal);
GET_CACHE_SLOT(ret);
return ret;
}
/* }}} */
int zend_add_const_name_literal(zend_op_array *op_array, const zval *zv, int unqualified TSRMLS_DC) /* {{{ */
{
int ret, tmp_literal;
char *name, *tmp_name;
const char *ns_separator;
int name_len, ns_len;
zval c;
if (op_array->last_literal > 0 &&
&op_array->literals[op_array->last_literal - 1].constant == zv &&
op_array->literals[op_array->last_literal - 1].cache_slot == -1) {
/* we already have function name as last literal (do nothing) */
ret = op_array->last_literal - 1;
} else {
ret = zend_add_literal(op_array, zv TSRMLS_CC);
}
/* skip leading '\\' */
if (Z_STRVAL_P(zv)[0] == '\\') {
name_len = Z_STRLEN_P(zv) - 1;
name = Z_STRVAL_P(zv) + 1;
} else {
name_len = Z_STRLEN_P(zv);
name = Z_STRVAL_P(zv);
}
ns_separator = zend_memrchr(name, '\\', name_len);
if (ns_separator) {
ns_len = ns_separator - name;
} else {
ns_len = 0;
}
if (ns_len) {
/* lowercased namespace name & original constant name */
tmp_name = estrndup(name, name_len);
zend_str_tolower(tmp_name, ns_len);
ZVAL_STRINGL(&c, tmp_name, name_len, 0);
tmp_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(tmp_literal);
/* lowercased namespace name & lowercased constant name */
tmp_name = zend_str_tolower_dup(name, name_len);
ZVAL_STRINGL(&c, tmp_name, name_len, 0);
tmp_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(tmp_literal);
}
if (ns_len) {
if (!unqualified) {
return ret;
}
ns_len++;
name += ns_len;
name_len -= ns_len;
}
/* original constant name */
tmp_name = estrndup(name, name_len);
ZVAL_STRINGL(&c, tmp_name, name_len, 0);
tmp_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(tmp_literal);
/* lowercased constant name */
tmp_name = zend_str_tolower_dup(name, name_len);
ZVAL_STRINGL(&c, tmp_name, name_len, 0);
tmp_literal = zend_add_literal(CG(active_op_array), &c TSRMLS_CC);
CALCULATE_LITERAL_HASH(tmp_literal);
return ret;
}
/* }}} */
#define LITERAL_STRINGL(op, str, len, copy) do { \
zval _c; \
ZVAL_STRINGL(&_c, str, len, copy); \
op.constant = zend_add_literal(CG(active_op_array), &_c TSRMLS_CC); \
} while (0)
#define LITERAL_LONG(op, val) do { \
zval _c; \
ZVAL_LONG(&_c, val); \
op.constant = zend_add_literal(CG(active_op_array), &_c TSRMLS_CC); \
} while (0)
#define LITERAL_LONG_EX(op_array, op, val) do { \
zval _c; \
ZVAL_LONG(&_c, val); \
op.constant = zend_add_literal(op_array, &_c TSRMLS_CC); \
} while (0)
#define LITERAL_NULL(op) do { \
zval _c; \
INIT_ZVAL( _c); \
op.constant = zend_add_literal(CG(active_op_array), &_c TSRMLS_CC); \
} while (0)
static inline zend_bool zend_is_function_or_method_call(const znode *variable) /* {{{ */
{
zend_uint type = variable->EA;
return ((type & ZEND_PARSED_METHOD_CALL) || (type == ZEND_PARSED_FUNCTION_CALL));
}
/* }}} */
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_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable(CG(active_op_array));
SET_NODE(opline->op1, op1);
SET_NODE(opline->op2, op2);
GET_NODE(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_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable(CG(active_op_array));
SET_NODE(opline->op1, op1);
GET_NODE(result, opline->result);
SET_UNUSED(opline->op2);
}
/* }}} */
#define MAKE_NOP(opline) { opline->opcode = ZEND_NOP; memset(&opline->result,0,sizeof(opline->result)); memset(&opline->op1,0,sizeof(opline->op1)); memset(&opline->op2,0,sizeof(opline->op2)); opline->result_type=opline->op1_type=opline->op2_type=IS_UNUSED; }
static void zend_do_op_data(zend_op *data_op, const znode *value TSRMLS_DC) /* {{{ */
{
data_op->opcode = ZEND_OP_DATA;
SET_NODE(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);
GET_NODE(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.var = get_temporary_variable(CG(active_op_array));
opline->op2_type = IS_VAR;
SET_UNUSED(opline->result);
GET_NODE(result,last_op->result);
return;
default:
break;
}
}
opline->opcode = op;
SET_NODE(opline->op1, op1);
SET_NODE(opline->op2, op2);
opline->result_type = IS_VAR;
opline->result.var = get_temporary_variable(CG(active_op_array));
GET_NODE(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) {
ulong hash;
if (Z_TYPE(varname->u.constant) != IS_STRING) {
convert_to_string(&varname->u.constant);
}
hash = str_hash(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant));
if (!zend_is_auto_global_quick(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), hash TSRMLS_CC) &&
!(Z_STRLEN(varname->u.constant) == (sizeof("this")-1) &&
!memcmp(Z_STRVAL(varname->u.constant), "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.op.var = lookup_cv(CG(active_op_array), Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), hash TSRMLS_CC);
Z_STRVAL(varname->u.constant) = (char*)CG(active_op_array)->vars[result->u.op.var].name;
result->EA = 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_type = IS_VAR;
opline_ptr->result.var = get_temporary_variable(CG(active_op_array));
SET_NODE(opline_ptr->op1, varname);
GET_NODE(result, opline_ptr->result);
SET_UNUSED(opline_ptr->op2);
opline_ptr->extended_value = ZEND_FETCH_LOCAL;
if (varname->op_type == IS_CONST) {
CALCULATE_LITERAL_HASH(opline_ptr->op1.constant);
if (zend_is_auto_global_quick(Z_STRVAL(varname->u.constant), Z_STRLEN(varname->u.constant), Z_HASH_P(&CONSTANT(opline_ptr->op1.constant)) TSRMLS_CC)) {
opline_ptr->extended_value = 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;
if (class_name->op_type == IS_CONST &&
ZEND_FETCH_CLASS_DEFAULT == zend_get_class_fetch_type(Z_STRVAL(class_name->u.constant), Z_STRLEN(class_name->u.constant))) {
zend_resolve_class_name(class_name TSRMLS_CC);
class_node = *class_name;
} else {
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_type = IS_VAR;
opline.result.var = get_temporary_variable(CG(active_op_array));
opline.op1_type = IS_CONST;
LITERAL_STRINGL(opline.op1, estrdup(CG(active_op_array)->vars[result->u.op.var].name), CG(active_op_array)->vars[result->u.op.var].name_len, 0);
CALCULATE_LITERAL_HASH(opline.op1.constant);
GET_POLYMORPHIC_CACHE_SLOT(opline.op1.constant);
if (class_node.op_type == IS_CONST) {
opline.op2_type = IS_CONST;
opline.op2.constant =
zend_add_class_name_literal(CG(active_op_array), &class_node.u.constant TSRMLS_CC);
} else {
SET_NODE(opline.op2, &class_node);
}
GET_NODE(result,opline.result);
opline.extended_value |= ZEND_FETCH_STATIC_MEMBER;
opline_ptr = &opline;
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_type == IS_CV) {
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_FETCH_W;
opline.result_type = IS_VAR;
opline.result.var = get_temporary_variable(CG(active_op_array));
opline.op1_type = IS_CONST;
LITERAL_STRINGL(opline.op1, estrdup(CG(active_op_array)->vars[opline_ptr->op1.var].name), CG(active_op_array)->vars[opline_ptr->op1.var].name_len, 0);
CALCULATE_LITERAL_HASH(opline.op1.constant);
GET_POLYMORPHIC_CACHE_SLOT(opline.op1.constant);
if (class_node.op_type == IS_CONST) {
opline.op2_type = IS_CONST;
opline.op2.constant =
zend_add_class_name_literal(CG(active_op_array), &class_node.u.constant TSRMLS_CC);
} else {
SET_NODE(opline.op2, &class_node);
}
opline.extended_value |= ZEND_FETCH_STATIC_MEMBER;
COPY_NODE(opline_ptr->op1, opline.result);
zend_llist_prepend_element(fetch_list_ptr, &opline);
} else {
if (opline_ptr->op1_type == IS_CONST) {
GET_POLYMORPHIC_CACHE_SLOT(opline_ptr->op1.constant);
}
if (class_node.op_type == IS_CONST) {
opline_ptr->op2_type = IS_CONST;
opline_ptr->op2.constant =
zend_add_class_name_literal(CG(active_op_array), &class_node.u.constant TSRMLS_CC);
} else {
SET_NODE(opline_ptr->op2, &class_node);
}
opline_ptr->extended_value |= 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;
zend_stack_top(&CG(bp_stack), (void **) &fetch_list_ptr);
if (zend_is_function_or_method_call(parent)) {
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_SEPARATE;
SET_NODE(opline.op1, parent);
SET_UNUSED(opline.op2);
opline.result_type = IS_VAR;
opline.result.var = opline.op1.var;
zend_llist_add_element(fetch_list_ptr, &opline);
}
init_op(&opline TSRMLS_CC);
opline.opcode = ZEND_FETCH_DIM_W; /* the backpatching routine assumes W */
opline.result_type = IS_VAR;
opline.result.var = get_temporary_variable(CG(active_op_array));
SET_NODE(opline.op1, parent);
SET_NODE(opline.op2, dim);
if (opline.op2_type == IS_CONST && Z_TYPE(CONSTANT(opline.op2.constant)) == IS_STRING) {
ulong index;
int numeric = 0;
ZEND_HANDLE_NUMERIC_EX(Z_STRVAL(CONSTANT(opline.op2.constant)), Z_STRLEN(CONSTANT(opline.op2.constant))+1, index, numeric = 1);
if (numeric) {
zval_dtor(&CONSTANT(opline.op2.constant));
ZVAL_LONG(&CONSTANT(opline.op2.constant), index);
} else {
CALCULATE_LITERAL_HASH(opline.op2.constant);
}
}
GET_NODE(result, opline.result);
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_type = IS_TMP_VAR;
opline->result.var = get_temporary_variable(CG(active_op_array));
opline->opcode = ZEND_PRINT;
SET_NODE(opline->op1, arg);
SET_UNUSED(opline->op2);
GET_NODE(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;
SET_NODE(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 (Z_LVAL(modifiers->u.constant) & ZEND_ACC_ABSTRACT) {
if(Z_LVAL(modifiers->u.constant) & ZEND_ACC_PRIVATE) {
zend_error(E_COMPILE_ERROR, "%s function %s::%s() cannot be declared private", method_type, CG(active_class_entry)->name, Z_STRVAL(function_name->u.constant));
}
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, Z_STRVAL(function_name->u.constant));
}
} else {
if (Z_LVAL(body->u.constant) == ZEND_ACC_ABSTRACT) {
zend_error(E_COMPILE_ERROR, "Non-abstract method %s::%s() must contain body", CG(active_class_entry)->name, Z_STRVAL(function_name->u.constant));
}
}
}
/* }}} */
static zend_bool opline_is_fetch_this(const zend_op *opline TSRMLS_DC) /* {{{ */
{
if ((opline->opcode == ZEND_FETCH_W) && (opline->op1_type == IS_CONST)
&& (Z_TYPE(CONSTANT(opline->op1.constant)) == IS_STRING)
&& (Z_HASH_P(&CONSTANT(opline->op1.constant)) == THIS_HASHVAL)
&& (Z_STRLEN(CONSTANT(opline->op1.constant)) == (sizeof("this")-1))
&& !memcmp(Z_STRVAL(CONSTANT(opline->op1.constant)), "this", sizeof("this"))) {
return 1;
} else {
return 0;
}
}
/* }}} */
void zend_do_assign(znode *result, znode *variable, 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_type == IS_CV &&
opline->op1.var == value->u.op.var) {
opline = get_next_op(CG(active_op_array) TSRMLS_CC);
opline->opcode = ZEND_FETCH_R;
opline->result_type = IS_VAR;
opline->result.var = get_temporary_variable(CG(active_op_array));
opline->op1_type = IS_CONST;
LITERAL_STRINGL(opline->op1,
CG(active_op_array)->vars[value->u.op.var].name,
CG(active_op_array)->vars[value->u.op.var].name_len, 1);
CALCULATE_LITERAL_HASH(opline->op1.constant);
SET_UNUSED(opline->op2);
opline->extended_value = ZEND_FETCH_LOCAL;
GET_NODE(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.op.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_type == IS_VAR &&
last_op->result.var == variable->u.op.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);
GET_NODE(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.var = get_temporary_variable(CG(active_op_array));
opline->op2_type = IS_VAR;
SET_UNUSED(opline->result);
GET_NODE(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 {