/* Copyright 2014-2016 Samsung Electronics Co., Ltd. * Copyright 2015-2016 University of Szeged. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ #ifndef VM_H #define VM_H #include "ecma-globals.h" #include "jrt.h" #include "vm-defines.h" /** \addtogroup vm Virtual machine * @{ * * \addtogroup vm_executor Executor * @{ */ /** * Each CBC opcode is transformed to three vm opcodes: * * - first opcode is a "get arguments" opcode which specifies * the type (register, literal, stack, etc.) and number * (from 0 to 2) of input arguments * - second opcode is a "group" opcode which specifies * the actual operation (add, increment, call, etc.) * - third opcode is a "put result" opcode which specifies * the destination where the result is stored (register, * stack, etc.) */ /** * Branch argument is a backward branch */ #define VM_OC_BACKWARD_BRANCH 0x4000 /** * Position of "get arguments" opcode. */ #define VM_OC_GET_ARGS_SHIFT 7 /** * Mask of "get arguments" opcode. */ #define VM_OC_GET_ARGS_MASK 0x7 /** * Generate the binary representation of a "get arguments" opcode. */ #define VM_OC_GET_ARGS_CREATE_INDEX(V) (((V) & VM_OC_GET_ARGS_MASK) << VM_OC_GET_ARGS_SHIFT) /** * Extract the "get arguments" opcode. */ #define VM_OC_GET_ARGS_INDEX(O) ((O) & (VM_OC_GET_ARGS_MASK << VM_OC_GET_ARGS_SHIFT)) /** * Checks whether the result is stored somewhere. */ #define VM_OC_HAS_GET_ARGS(V) ((V) & (VM_OC_GET_ARGS_MASK << VM_OC_GET_ARGS_SHIFT)) /** * Argument getters that are part of the opcodes. */ typedef enum { VM_OC_GET_NONE = VM_OC_GET_ARGS_CREATE_INDEX (0), /**< do nothing */ VM_OC_GET_BRANCH = VM_OC_GET_ARGS_CREATE_INDEX (1), /**< branch argument */ VM_OC_GET_STACK = VM_OC_GET_ARGS_CREATE_INDEX (2), /**< pop one element from the stack */ VM_OC_GET_STACK_STACK = VM_OC_GET_ARGS_CREATE_INDEX (3), /**< pop two elements from the stack */ VM_OC_GET_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (4), /**< resolve literal */ VM_OC_GET_LITERAL_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (5), /**< resolve two literals */ VM_OC_GET_STACK_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (6), /**< pop one element from the stack * and resolve a literal */ VM_OC_GET_THIS_LITERAL = VM_OC_GET_ARGS_CREATE_INDEX (7), /**< get this and resolve a literal */ } vm_oc_get_types; /** * Mask of "group" opcode. */ #define VM_OC_GROUP_MASK 0x7f /** * Extract the "group" opcode. */ #define VM_OC_GROUP_GET_INDEX(O) ((O) & VM_OC_GROUP_MASK) /** * Opcodes. */ typedef enum { VM_OC_NONE, /**< do nothing */ VM_OC_POP, /**< pop from stack */ VM_OC_POP_BLOCK, /**< pop block */ VM_OC_PUSH, /**< push one element */ VM_OC_PUSH_TWO, /**< push two elements onto the stack */ VM_OC_PUSH_THREE, /**< push three elements onto the stack */ VM_OC_PUSH_UNDEFINED, /**< push undefined value */ VM_OC_PUSH_TRUE, /**< push true value */ VM_OC_PUSH_FALSE, /**< push false value */ VM_OC_PUSH_NULL, /**< push null value */ VM_OC_PUSH_THIS, /**< push this */ VM_OC_PUSH_NUMBER_0, /**< push number zero */ VM_OC_PUSH_NUMBER_POS_BYTE, /**< push number between 1 and 256 */ VM_OC_PUSH_NUMBER_NEG_BYTE, /**< push number between -1 and -256 */ VM_OC_PUSH_OBJECT, /**< push object */ VM_OC_SET_PROPERTY, /**< set property */ VM_OC_SET_GETTER, /**< set getter */ VM_OC_SET_SETTER, /**< set setter */ VM_OC_PUSH_UNDEFINED_BASE, /**< push undefined base */ VM_OC_PUSH_ARRAY, /**< push array */ VM_OC_PUSH_ELISON, /**< push elison */ VM_OC_APPEND_ARRAY, /**< append array */ VM_OC_IDENT_REFERENCE, /**< ident reference */ VM_OC_PROP_REFERENCE, /**< prop reference */ VM_OC_PROP_GET, /**< prop get */ /* These eight opcodes must be in this order. */ VM_OC_PROP_PRE_INCR, /**< prefix increment of a property */ VM_OC_PROP_PRE_DECR, /**< prop prefix decrement of a property */ VM_OC_PROP_POST_INCR, /**< prop postfix increment of a property */ VM_OC_PROP_POST_DECR, /**< prop postfix decrement of a property */ VM_OC_PRE_INCR, /**< prefix increment */ VM_OC_PRE_DECR, /**< prefix decrement */ VM_OC_POST_INCR, /**< postfix increment */ VM_OC_POST_DECR, /**< postfix decrement */ VM_OC_PROP_DELETE, /**< delete property */ VM_OC_DELETE, /**< delete */ VM_OC_ASSIGN, /**< assign */ VM_OC_ASSIGN_PROP, /**< assign property */ VM_OC_ASSIGN_PROP_THIS, /**< assign prop this */ VM_OC_RET, /**< return */ VM_OC_THROW, /**< throw */ VM_OC_THROW_REFERENCE_ERROR, /**< throw reference error */ VM_OC_EVAL, /**< eval */ VM_OC_CALL, /**< call */ VM_OC_NEW, /**< new */ VM_OC_JUMP, /**< jump */ VM_OC_BRANCH_IF_STRICT_EQUAL, /**< branch if stric equal */ /* These four opcodes must be in this order. */ VM_OC_BRANCH_IF_TRUE, /**< branch if true */ VM_OC_BRANCH_IF_FALSE, /**< branch if false */ VM_OC_BRANCH_IF_LOGICAL_TRUE, /**< branch if logical true */ VM_OC_BRANCH_IF_LOGICAL_FALSE, /**< branch if logical false */ VM_OC_PLUS, /**< unary plus */ VM_OC_MINUS, /**< unary minus */ VM_OC_NOT, /**< not */ VM_OC_BIT_NOT, /**< bitwise not */ VM_OC_VOID, /**< void */ VM_OC_TYPEOF_IDENT, /**< typeof identifier */ VM_OC_TYPEOF, /**< typeof */ VM_OC_ADD, /**< binary add */ VM_OC_SUB, /**< binary sub */ VM_OC_MUL, /**< mul */ VM_OC_DIV, /**< div */ VM_OC_MOD, /**< mod */ VM_OC_EQUAL, /**< equal */ VM_OC_NOT_EQUAL, /**< not equal */ VM_OC_STRICT_EQUAL, /**< strict equal */ VM_OC_STRICT_NOT_EQUAL, /**< strict not equal */ VM_OC_LESS, /**< less */ VM_OC_GREATER, /**< greater */ VM_OC_LESS_EQUAL, /**< less equal */ VM_OC_GREATER_EQUAL, /**< greater equal */ VM_OC_IN, /**< in */ VM_OC_INSTANCEOF, /**< instanceof */ VM_OC_BIT_OR, /**< bitwise or */ VM_OC_BIT_XOR, /**< bitwise xor */ VM_OC_BIT_AND, /**< bitwise and */ VM_OC_LEFT_SHIFT, /**< left shift */ VM_OC_RIGHT_SHIFT, /**< right shift */ VM_OC_UNS_RIGHT_SHIFT, /**< unsigned right shift */ VM_OC_WITH, /**< with */ VM_OC_FOR_IN_CREATE_CONTEXT, /**< for in create context */ VM_OC_FOR_IN_GET_NEXT, /**< get next */ VM_OC_FOR_IN_HAS_NEXT, /**< has next */ VM_OC_TRY, /**< try */ VM_OC_CATCH, /**< catch */ VM_OC_FINALLY, /**< finally */ VM_OC_CONTEXT_END, /**< context end */ VM_OC_JUMP_AND_EXIT_CONTEXT, /**< jump and exit context */ } vm_oc_types; /** * Decrement operator. */ #define VM_OC_DECREMENT_OPERATOR_FLAG 0x1 /** * Postfix increment/decrement operator. */ #define VM_OC_POST_INCR_DECR_OPERATOR_FLAG 0x2 /** * An named variable is updated by the increment/decrement operator. */ #define VM_OC_IDENT_INCR_DECR_OPERATOR_FLAG 0x4 /** * Jump to target offset if input value is logical false. */ #define VM_OC_BRANCH_IF_FALSE_FLAG 0x1 /** * Branch optimized for logical and/or opcodes. */ #define VM_OC_LOGICAL_BRANCH_FLAG 0x2 /** * Position of "put result" opcode. */ #define VM_OC_PUT_RESULT_SHIFT 10 /** * Mask of "put result" opcode. */ #define VM_OC_PUT_RESULT_MASK 0xf /** * Generate a "put result" opcode flag bit. */ #define VM_OC_PUT_RESULT_CREATE_FLAG(V) (((V) & VM_OC_PUT_RESULT_MASK) << VM_OC_PUT_RESULT_SHIFT) /** * Checks whether the result is stored somewhere. */ #define VM_OC_HAS_PUT_RESULT(V) ((V) & (VM_OC_PUT_RESULT_MASK << VM_OC_PUT_RESULT_SHIFT)) /** * Specify where the result is stored */ typedef enum { VM_OC_PUT_IDENT = VM_OC_PUT_RESULT_CREATE_FLAG (0x1), VM_OC_PUT_REFERENCE = VM_OC_PUT_RESULT_CREATE_FLAG (0x2), VM_OC_PUT_STACK = VM_OC_PUT_RESULT_CREATE_FLAG (0x4), VM_OC_PUT_BLOCK = VM_OC_PUT_RESULT_CREATE_FLAG (0x8), } vm_oc_put_types; /** * Non-recursive vm_loop: the vm_loop can be suspended * to execute a call /construct operation. These return * types of the vm_loop tells whether a call operation * is in progress or the vm_loop is finished. */ typedef enum { VM_NO_EXEC_OP, /**< do nothing */ VM_EXEC_CALL, /**< invoke a function */ VM_EXEC_CONSTRUCT, /**< construct a new object */ } vm_call_operation; extern ecma_value_t vm_run_global (const ecma_compiled_code_t *); extern ecma_value_t vm_run_eval (ecma_compiled_code_t *, bool); extern ecma_value_t vm_run (const ecma_compiled_code_t *, ecma_value_t, ecma_object_t *, bool, const ecma_value_t *, ecma_length_t); extern bool vm_is_strict_mode (void); extern bool vm_is_direct_eval_form_call (void); /** * @} * @} */ #endif /* !VM_H */