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// opcode處理器 --- ZEND_DO_FCALL_SPEC_CONST_HANDLER實現(xiàn)在 php-5.6.26\Zend\zend_vm_execute.h static int ZEND_FASTCALL ZEND_DO_FCALL_SPEC_CONST_HANDLER(ZEND_OPCODE_HANDLER_ARGS) {USE_OPLINEzval *fname = opline->op1.zv;call_slot *call = EX(call_slots) + opline->op2.num;if (CACHED_PTR(opline->op1.literal->cache_slot)) {EX(function_state).function = CACHED_PTR(opline->op1.literal->cache_slot);} else if (UNEXPECTED(zend_hash_quick_find(EG(function_table), Z_STRVAL_P(fname), Z_STRLEN_P(fname)+1, Z_HASH_P(fname), (void **) &EX(function_state).function)==FAILURE)) { // 查找函數(shù)，把函數(shù)指針放入 EX(function_state).function SAVE_OPLINE();zend_error_noreturn(E_ERROR, "Call to undefined function %s()", fname->value.str.val);} else {CACHE_PTR(opline->op1.literal->cache_slot, EX(function_state).function);}call->fbc = EX(function_state).function; // 函數(shù)信息指針call->object = NULL;call->called_scope = NULL;call->num_additional_args = 0;call->is_ctor_call = 0;EX(call) = call;// ZEND_OPCODE_HANDLER_ARGS_PASSTHRU ---> execute_data TSRMLS_CCreturn zend_do_fcall_common_helper_SPEC(ZEND_OPCODE_HANDLER_ARGS_PASSTHRU); // zend_do_fcall_common_helper_SPEC(execute_data) {...if (fbc->type == ZEND_INTERNAL_FUNCTION) { // 內(nèi)建函數(shù) --- 執(zhí)行的是函數(shù)指針（擴展中定義的函數(shù)）if (fbc->common.fn_flags & ZEND_ACC_HAS_TYPE_HINTS) {zend_uint i;void **p = EX(function_state).arguments - num_args;for (i = 0; i < num_args; ++i, ++p) {zend_verify_arg_type(fbc, i + 1, (zval *) *p, 0, NULL TSRMLS_CC);}}if (EXPECTED(EG(exception) == NULL)) {temp_variable *ret = &EX_T(opline->result.var);MAKE_STD_ZVAL(ret->var.ptr);ZVAL_NULL(ret->var.ptr);ret->var.ptr_ptr = &ret->var.ptr;ret->var.fcall_returned_reference = (fbc->common.fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;if (!zend_execute_internal) { // !!! 執(zhí)行函數(shù)/* saves one function call if zend_execute_internal is not used */fbc->internal_function.handler(num_args, ret->var.ptr, &ret->var.ptr, EX(object), RETURN_VALUE_USED(opline) TSRMLS_CC); // 調(diào)用擴展模塊的函數(shù)} else {zend_execute_internal(execute_data, NULL, RETURN_VALUE_USED(opline) TSRMLS_CC);}if (!RETURN_VALUE_USED(opline)) {zval_ptr_dtor(&ret->var.ptr);}} else if (RETURN_VALUE_USED(opline)) {EX_T(opline->result.var).var.ptr = NULL;}} else if (fbc->type == ZEND_USER_FUNCTION) { // 用戶定義的函數(shù) --- 執(zhí)行的opcodetemp_variable *ret = &EX_T(opline->result.var);EX(original_return_value) = EG(return_value_ptr_ptr);EG(active_symbol_table) = NULL;EG(active_op_array) = &fbc->op_array; // !!! 用戶函數(shù)編譯出來的操作碼EG(return_value_ptr_ptr) = NULL;if (RETURN_VALUE_USED(opline)) {ret->var.ptr = NULL;EG(return_value_ptr_ptr) = &ret->var.ptr;ret->var.ptr_ptr = &ret->var.ptr;ret->var.fcall_returned_reference = (fbc->common.fn_flags & ZEND_ACC_RETURN_REFERENCE) != 0;}if (UNEXPECTED((EG(active_op_array)->fn_flags & ZEND_ACC_GENERATOR) != 0)) {if (RETURN_VALUE_USED(opline)) {ret->var.ptr = zend_generator_create_zval(EG(active_op_array) TSRMLS_CC);ret->var.fcall_returned_reference = 0;}} else if (EXPECTED(zend_execute_ex == execute_ex)) {if (EXPECTED(EG(exception) == NULL)) {ZEND_VM_ENTER();}} else {zend_execute(EG(active_op_array) TSRMLS_CC); // 執(zhí)行操作碼 }EG(opline_ptr) = &EX(opline);EG(active_op_array) = EX(op_array);EG(return_value_ptr_ptr) = EX(original_return_value);if (EG(active_symbol_table)) {zend_clean_and_cache_symbol_table(EG(active_symbol_table) TSRMLS_CC);}EG(active_symbol_table) = EX(symbol_table);} else { /* ZEND_OVERLOADED_FUNCTION */MAKE_STD_ZVAL(EX_T(opline->result.var).var.ptr);ZVAL_NULL(EX_T(opline->result.var).var.ptr);/* Not sure what should be done here if it's a static method */if (EXPECTED(EX(object) != NULL)) {// 調(diào)用對象方法Z_OBJ_HT_P(EX(object))->call_method(fbc->common.function_name, num_args, EX_T(opline->result.var).var.ptr, &EX_T(opline->result.var).var.ptr, EX(object), RETURN_VALUE_USED(opline) TSRMLS_CC);} else {zend_error_noreturn(E_ERROR, "Cannot call overloaded function for non-object");}if (fbc->type == ZEND_OVERLOADED_FUNCTION_TEMPORARY) {efree((char*)fbc->common.function_name);}efree(fbc);if (!RETURN_VALUE_USED(opline)) {zval_ptr_dtor(&EX_T(opline->result.var).var.ptr);} else {Z_UNSET_ISREF_P(EX_T(opline->result.var).var.ptr);Z_SET_REFCOUNT_P(EX_T(opline->result.var).var.ptr, 1);EX_T(opline->result.var).var.fcall_returned_reference = 0;EX_T(opline->result.var).var.ptr_ptr = &EX_T(opline->result.var).var.ptr;}}...EX(call)--;zend_vm_stack_clear_multiple(0 TSRMLS_CC);if (UNEXPECTED(EG(exception) != NULL)) {zend_throw_exception_internal(NULL TSRMLS_CC); // 拋異常if (RETURN_VALUE_USED(opline) && EX_T(opline->result.var).var.ptr) {zval_ptr_dtor(&EX_T(opline->result.var).var.ptr);}HANDLE_EXCEPTION(); }ZEND_VM_NEXT_OPCODE();...} }

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轉(zhuǎn)載于:https://www.cnblogs.com/xiaoyaogege/p/8629058.html

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