Implement sccp ct eval

Author: iluuu1994

Zend/Optimizer/sccp.c

@@ -1708,6 +1708,44 @@ static void sccp_visit_instr(scdf_ctx *scdf, zend_op *opline, zend_ssa_op *ssa_o
 			SET_RESULT_BOT(result);
 			break;
 		}
+		case ZEND_FRAMELESS_ICALL_0:
+		case ZEND_FRAMELESS_ICALL_1:
+		case ZEND_FRAMELESS_ICALL_2:
+		case ZEND_FRAMELESS_ICALL_3: {
+			zval *args[3] = {NULL};
+			uint32_t num_args = opline->opcode - ZEND_FRAMELESS_ICALL_0;
+			zend_function **funcs;
+			switch (opline->opcode) {
+				case ZEND_FRAMELESS_ICALL_0:
+					funcs = zend_frameless_function_0_functions;
+					break;
+				case ZEND_FRAMELESS_ICALL_1:
+					args[0] = get_op1_value(ctx, opline, &ctx->scdf.ssa->ops[opline - ctx->scdf.op_array->opcodes]);
+					funcs = zend_frameless_function_1_functions;
+					break;
+				case ZEND_FRAMELESS_ICALL_2:
+					args[0] = get_op1_value(ctx, opline, &ctx->scdf.ssa->ops[opline - ctx->scdf.op_array->opcodes]);
+					args[1] = get_op2_value(ctx, opline, &ctx->scdf.ssa->ops[opline - ctx->scdf.op_array->opcodes]);
+					funcs = zend_frameless_function_2_functions;
+					break;
+	 			case ZEND_FRAMELESS_ICALL_3: {
+					zend_op *op_data = opline + 1;
+					args[0] = get_op1_value(ctx, opline, &ctx->scdf.ssa->ops[opline - ctx->scdf.op_array->opcodes]);
+					args[1] = get_op2_value(ctx, opline, &ctx->scdf.ssa->ops[opline - ctx->scdf.op_array->opcodes]);
+					args[2] = get_op2_value(ctx, op_data, &ctx->scdf.ssa->ops[op_data - ctx->scdf.op_array->opcodes]);
+					funcs = zend_frameless_function_3_functions;
+					break;
+				}
+			}
+			zend_function *func = funcs[opline->extended_value];
+			if (ct_eval_func_call(scdf->op_array, &zv, func->common.function_name, num_args, args) == SUCCESS) {
+				SET_RESULT(result, &zv);
+				zval_ptr_dtor_nogc(&zv);
+				break;
+			}
+			SET_RESULT_BOT(result);
+			break;
+		}
 		default:
 		{
 			/* If we have no explicit implementation return BOT */

Zend/zend_API.h

@@ -93,7 +93,8 @@ typedef struct _zend_fcall_info_cache {
 #define ZEND_ABSTRACT_ME_WITH_FLAGS(classname, name, arg_info, flags)	ZEND_RAW_FENTRY(#name, NULL, arg_info, flags, NULL)
 #define ZEND_MALIAS(classname, name, alias, arg_info, flags) ZEND_RAW_FENTRY(#name, zim_##classname##_##alias, arg_info, flags, NULL)
 #define ZEND_ME_MAPPING(name, func_name, arg_info, flags) ZEND_RAW_FENTRY(#name, zif_##func_name, arg_info, flags, NULL)
-#define ZEND_DIRECT_FE(name, arg_info, frameless_function_infos)	{ #name, zif_##name, arg_info, (uint32_t) (sizeof(arg_info)/sizeof(struct _zend_internal_arg_info)-1), 0, frameless_function_infos },
+#define ZEND_FRAMELESS_FE(name, arg_info, flags, frameless_function_infos) \
+	{ #name, zif_##name, arg_info, (uint32_t) (sizeof(arg_info)/sizeof(struct _zend_internal_arg_info)-1), flags, frameless_function_infos },
 
 #define ZEND_NS_FENTRY(ns, zend_name, name, arg_info, flags)		ZEND_RAW_FENTRY(ZEND_NS_NAME(ns, #zend_name), name, arg_info, flags, NULL)
 

Zend/zend_builtin_functions_arginfo.h

@@ -1402,10 +1402,10 @@ public function getFunctionEntry(): string {
                 if ($this->alias) {
                     die('Aliased direct calls are not supported yet');
                 }
-                // FIXME: Missing options for CTE
+                $flags = $this->supportsCompileTimeEval ? 'ZEND_ACC_COMPILE_TIME_EVAL' : '0';
                 return sprintf(
-                    "\tZEND_DIRECT_FE(%s, %s, %s)\n",
-                    $functionName, $this->getArgInfoName(), $this->getFramelessFunctionInfosName()
+                    "\tZEND_FRAMELESS_FE(%s, %s, %s, %s)\n",
+                    $functionName, $this->getArgInfoName(), $flags, $this->getFramelessFunctionInfosName()
                 );
             }
 

build/gen_stub.php

@@ -0,0 +1,21 @@
+--TEST--
+Test ct eval of frameless function
+--INI--
+opcache.enable=1
+opcache.enable_cli=1
+opcache.optimization_level=-1
+opcache.opt_debug_level=0x20000
+--EXTENSIONS--
+opcache
+--FILE--
+<?php
+echo dirname(__DIR__);
+?>
+--EXPECTF--
+$_main:
+     ; (lines=2, args=0, vars=0, tmps=0)
+     ; (after optimizer)
+     ; %sct_eval_frameless.php:1-4
+0000 ECHO string("%sopcache")
+0001 RETURN int(1)
+%sopcache