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/*
* Copyright (C) Igor Sysoev
* Copyright (C) NGINX, Inc.
*/
#ifndef _NJS_VMCODE_H_INCLUDED_
#define _NJS_VMCODE_H_INCLUDED_
/*
* Negative return values handled by nJSVM interpreter as special events.
* The values must be in range from -1 to -11, because -12 is minimal jump
* offset on 32-bit platforms.
* 0 (NJS_OK) : njs_vmcode_stop() has stopped execution,
* execution successfully finished
* -1 (NJS_ERROR): error or exception;
* -2 .. -11: not used.
*/
/* The last return value which preempts execution. */
#define NJS_PREEMPT (-11)
typedef intptr_t njs_jump_off_t;
typedef uint8_t njs_vmcode_operation_t;
#define NJS_VMCODE_3OPERANDS 0
#define NJS_VMCODE_2OPERANDS 1
enum {
NJS_VMCODE_MOVE_ARG = 0,
NJS_VMCODE_STOP,
NJS_VMCODE_JUMP,
NJS_VMCODE_PROPERTY_SET,
NJS_VMCODE_PROPERTY_ACCESSOR,
NJS_VMCODE_IF_TRUE_JUMP,
NJS_VMCODE_IF_FALSE_JUMP,
NJS_VMCODE_IF_EQUAL_JUMP,
NJS_VMCODE_PROPERTY_INIT,
NJS_VMCODE_RETURN,
NJS_VMCODE_FUNCTION_COPY,
NJS_VMCODE_FUNCTION_FRAME,
NJS_VMCODE_METHOD_FRAME,
NJS_VMCODE_FUNCTION_CALL,
NJS_VMCODE_PROPERTY_NEXT,
NJS_VMCODE_THIS,
NJS_VMCODE_ARGUMENTS,
NJS_VMCODE_PROTO_INIT,
NJS_VMCODE_TRY_START,
NJS_VMCODE_THROW,
NJS_VMCODE_TRY_BREAK,
NJS_VMCODE_TRY_CONTINUE,
NJS_VMCODE_TRY_END,
NJS_VMCODE_CATCH,
NJS_VMCODE_FINALLY,
NJS_VMCODE_ERROR,
NJS_VMCODE_NORET = 127
};
enum {
NJS_VMCODE_MOVE = NJS_VMCODE_NORET + 1,
NJS_VMCODE_PROPERTY_GET,
NJS_VMCODE_INCREMENT,
NJS_VMCODE_POST_INCREMENT,
NJS_VMCODE_DECREMENT,
NJS_VMCODE_POST_DECREMENT,
NJS_VMCODE_TRY_RETURN,
NJS_VMCODE_GLOBAL_GET,
NJS_VMCODE_LESS,
NJS_VMCODE_GREATER,
NJS_VMCODE_LESS_OR_EQUAL,
NJS_VMCODE_GREATER_OR_EQUAL,
NJS_VMCODE_ADDITION,
NJS_VMCODE_EQUAL,
NJS_VMCODE_NOT_EQUAL,
NJS_VMCODE_SUBSTRACTION,
NJS_VMCODE_MULTIPLICATION,
NJS_VMCODE_EXPONENTIATION,
NJS_VMCODE_DIVISION,
NJS_VMCODE_REMAINDER,
NJS_VMCODE_BITWISE_AND,
NJS_VMCODE_BITWISE_OR,
NJS_VMCODE_BITWISE_XOR,
NJS_VMCODE_LEFT_SHIFT,
NJS_VMCODE_RIGHT_SHIFT,
NJS_VMCODE_UNSIGNED_RIGHT_SHIFT,
NJS_VMCODE_OBJECT_COPY,
NJS_VMCODE_TEMPLATE_LITERAL,
NJS_VMCODE_PROPERTY_IN,
NJS_VMCODE_PROPERTY_DELETE,
NJS_VMCODE_PROPERTY_FOREACH,
NJS_VMCODE_STRICT_EQUAL,
NJS_VMCODE_STRICT_NOT_EQUAL,
NJS_VMCODE_TEST_IF_TRUE,
NJS_VMCODE_TEST_IF_FALSE,
NJS_VMCODE_COALESCE,
NJS_VMCODE_UNARY_PLUS,
NJS_VMCODE_UNARY_NEGATION,
NJS_VMCODE_BITWISE_NOT,
NJS_VMCODE_LOGICAL_NOT,
NJS_VMCODE_OBJECT,
NJS_VMCODE_ARRAY,
NJS_VMCODE_FUNCTION,
NJS_VMCODE_REGEXP,
NJS_VMCODE_INSTANCE_OF,
NJS_VMCODE_TYPEOF,
NJS_VMCODE_VOID,
NJS_VMCODE_DELETE,
NJS_VMCODE_NOP = 255
};
typedef struct {
njs_vmcode_operation_t operation;
uint8_t operands; /* 2 bits */
} njs_vmcode_t;
typedef struct {
njs_vmcode_t code;
njs_index_t operand1;
njs_index_t operand2;
njs_index_t operand3;
} njs_vmcode_generic_t;
typedef struct {
njs_vmcode_t code;
njs_index_t index;
} njs_vmcode_1addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src;
} njs_vmcode_2addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src1;
njs_index_t src2;
} njs_vmcode_3addr_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
njs_index_t src;
} njs_vmcode_move_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_object_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
} njs_vmcode_this_t;
typedef struct {
njs_vmcode_t code;
njs_index_t dst;
} njs_vmcode_arguments_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
uintptr_t length;
uint8_t ctor; /* 1 bit */
} njs_vmcode_array_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_template_literal_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_function_lambda_t *lambda;
} njs_vmcode_function_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_regexp_pattern_t *pattern;
} njs_vmcode_regexp_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t object;
} njs_vmcode_object_copy_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
} njs_vmcode_jump_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t cond;
} njs_vmcode_cond_jump_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t value1;
njs_index_t value2;
} njs_vmcode_equal_jump_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t value;
njs_jump_off_t offset;
} njs_vmcode_test_jump_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
} njs_vmcode_prop_get_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
} njs_vmcode_prop_set_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t object;
njs_index_t property;
uint8_t type;
} njs_vmcode_prop_accessor_t;
typedef struct {
njs_vmcode_t code;
njs_index_t next;
njs_index_t object;
njs_jump_off_t offset;
} njs_vmcode_prop_foreach_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t object;
njs_index_t next;
njs_jump_off_t offset;
} njs_vmcode_prop_next_t;
typedef struct {
njs_vmcode_t code;
njs_index_t value;
njs_index_t constructor;
njs_index_t object;
} njs_vmcode_instance_of_t;
typedef struct {
njs_vmcode_t code;
njs_index_t nargs;
njs_index_t name;
uint8_t ctor; /* 1 bit */
} njs_vmcode_function_frame_t;
typedef struct {
njs_vmcode_t code;
njs_index_t nargs;
njs_index_t object;
njs_index_t method;
uint8_t ctor; /* 1 bit */
} njs_vmcode_method_frame_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_function_call_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_return_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_stop_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exception_value;
njs_index_t exit_value;
} njs_vmcode_try_start_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exit_value;
} njs_vmcode_try_trampoline_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
njs_index_t exception;
} njs_vmcode_catch_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
} njs_vmcode_throw_t;
typedef struct {
njs_vmcode_t code;
njs_jump_off_t offset;
} njs_vmcode_try_end_t;
typedef struct {
njs_vmcode_t code;
njs_index_t save;
njs_index_t retval;
njs_jump_off_t offset;
} njs_vmcode_try_return_t;
typedef struct {
njs_vmcode_t code;
njs_index_t retval;
njs_index_t exit_value;
njs_jump_off_t continue_offset;
njs_jump_off_t break_offset;
} njs_vmcode_finally_t;
typedef struct {
njs_vmcode_t code;
njs_object_type_t type;
union {
njs_str_t name;
njs_str_t message;
} u;
} njs_vmcode_error_t;
typedef struct {
njs_vmcode_t code;
njs_index_t src;
njs_uint_t dst;
} njs_vmcode_move_arg_t;
typedef struct {
njs_vmcode_t code;
njs_value_t *function;
njs_index_t retval;
} njs_vmcode_function_copy_t;
njs_int_t njs_vmcode_interpreter(njs_vm_t *vm, u_char *pc);
njs_object_t *njs_function_new_object(njs_vm_t *vm, njs_value_t *constructor);
#endif /* _NJS_VMCODE_H_INCLUDED_ */