archive-gh-me/jerryscript
1
0
Fork 0
mirror of https://github.com/jerryscript-project/jerryscript.git synced 2025-12-15 16:29:21 +00:00
Code Issues Projects Releases Wiki Activity
jerryscript/jerry-core/parser/js/js-parser-internal.h
Zoltan Herczeg b02ef67cd2 Add eval support for JerryScript debugger (#1588) 
The server can accept a string, execute it with eval,
and returns with the result converted to string. In
case of exception it returns with the exception message.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
2017-02-17 14:31:56 +01:00

464 lines
17 KiB
C
Raw Blame History

/* Copyright JS Foundation and other contributors, http://js.foundation
*
* 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 JS_PARSER_INTERNAL_H
#define JS_PARSER_INTERNAL_H
#include "common.h"
#include "byte-code.h"
#include "jerry-debugger.h"
#include "js-parser.h"
#include "js-parser-limits.h"
#include "js-lexer.h"
/** \addtogroup parser Parser
* @{
*
* \addtogroup jsparser JavaScript
* @{
*
* \addtogroup jsparser_internals Internals
* @{
*/
/* General parser flags. */
#define PARSER_IS_STRICT 0x00001u
#define PARSER_IS_FUNCTION 0x00002u
#define PARSER_IS_CLOSURE 0x00004u
#define PARSER_IS_PROPERTY_GETTER 0x00008u
#define PARSER_IS_PROPERTY_SETTER 0x00010u
#define PARSER_IS_FUNC_EXPRESSION 0x00020u
#define PARSER_HAS_NON_STRICT_ARG 0x00040u
#define PARSER_INSIDE_WITH 0x00080u
#define PARSER_RESOLVE_THIS_FOR_CALLS 0x00100u
#define PARSER_NAMED_FUNCTION_EXP 0x00200u
#define PARSER_HAS_INITIALIZED_VARS 0x00400u
#define PARSER_NO_END_LABEL 0x00800u
#define PARSER_NO_REG_STORE 0x01000u
#define PARSER_ARGUMENTS_NEEDED 0x02000u
#define PARSER_ARGUMENTS_NOT_NEEDED 0x04000u
#define PARSER_LEXICAL_ENV_NEEDED 0x08000u
#define PARSER_HAS_LATE_LIT_INIT 0x10000u
/* Expression parsing flags. */
#define PARSE_EXPR 0x00
#define PARSE_EXPR_STATEMENT 0x01
#define PARSE_EXPR_BLOCK 0x02
#define PARSE_EXPR_NO_COMMA 0x04
#define PARSE_EXPR_HAS_LITERAL 0x08
/* The maximum of PARSER_CBC_STREAM_PAGE_SIZE is 127. */
#define PARSER_CBC_STREAM_PAGE_SIZE \
((uint32_t) (64 - sizeof (void *)))
#define PARSER_STACK_PAGE_SIZE \
((uint32_t) (((sizeof (void *) > 4) ? 128 : 64) - sizeof (void *)))
/* Avoid compiler warnings for += operations. */
#define PARSER_PLUS_EQUAL_U16(base, value) (base) = (uint16_t) ((base) + (value))
#define PARSER_MINUS_EQUAL_U16(base, value) (base) = (uint16_t) ((base) - (value))
#define PARSER_PLUS_EQUAL_LC(base, value) (base) = (parser_line_counter_t) ((base) + (value))
/**
* Argument for a compact-byte code.
*/
typedef struct
{
uint16_t literal_index; /**< literal index argument */
uint16_t value; /**< other argument (second literal or byte). */
uint16_t third_literal_index; /**< literal index argument */
uint8_t literal_type; /**< last literal type */
uint8_t literal_object_type; /**< last literal object type */
} cbc_argument_t;
/* Useful parser macros. */
#define PARSER_CBC_UNAVAILABLE CBC_EXT_OPCODE
#define PARSER_TO_EXT_OPCODE(opcode) ((uint16_t) ((opcode) + 256))
#define PARSER_GET_EXT_OPCODE(opcode) ((opcode) - 256)
#define PARSER_IS_BASIC_OPCODE(opcode) ((opcode) < 256)
#define PARSER_IS_PUSH_LITERAL(opcode) \
((opcode) == CBC_PUSH_LITERAL \
|| (opcode) == CBC_PUSH_TWO_LITERALS \
|| (opcode) == CBC_PUSH_THREE_LITERALS)
#define PARSER_GET_LITERAL(literal_index) \
((lexer_literal_t *) parser_list_get (&context_p->literal_pool, (literal_index)))
#define PARSER_TO_BINARY_OPERATION_WITH_RESULT(opcode) \
(PARSER_TO_EXT_OPCODE(opcode) - CBC_ASSIGN_ADD + CBC_EXT_ASSIGN_ADD_PUSH_RESULT)
#define PARSER_TO_BINARY_OPERATION_WITH_BLOCK(opcode) \
((uint16_t) (PARSER_TO_EXT_OPCODE(opcode) - CBC_ASSIGN_ADD + CBC_EXT_ASSIGN_ADD_BLOCK))
#define PARSER_GET_FLAGS(op) \
(PARSER_IS_BASIC_OPCODE (op) ? cbc_flags[(op)] : cbc_ext_flags[PARSER_GET_EXT_OPCODE (op)])
#define PARSER_OPCODE_IS_RETURN(op) \
((op) == CBC_RETURN || (op) == CBC_RETURN_WITH_BLOCK || (op) == CBC_RETURN_WITH_LITERAL)
#define PARSER_ARGS_EQ(op, types) \
((PARSER_GET_FLAGS (op) & CBC_ARG_TYPES) == (types))
/**
* All data allocated by the parser is
* stored in parser_data_pages in the memory.
*/
typedef struct parser_mem_page_t
{
struct parser_mem_page_t *next_p; /**< next page */
uint8_t bytes[1]; /**< memory bytes */
} parser_mem_page_t;
/**
* Structure for managing parser memory.
*/
typedef struct
{
parser_mem_page_t *first_p; /**< first allocated page */
parser_mem_page_t *last_p; /**< last allocated page */
uint32_t last_position; /**< position of the last allocated byte */
} parser_mem_data_t;
/**
* Parser memory list.
*/
typedef struct
{
parser_mem_data_t data; /**< storage space */
uint32_t page_size; /**< size of each page */
uint32_t item_size; /**< size of each item */
uint32_t item_count; /**< number of items on each page */
} parser_list_t;
/**
* Iterator for parser memory list.
*/
typedef struct
{
parser_list_t *list_p; /**< parser list */
parser_mem_page_t *current_p; /**< currently processed page */
size_t current_position; /**< current position on the page */
} parser_list_iterator_t;
/**
* Parser memory stack.
*/
typedef struct
{
parser_mem_data_t data; /**< storage space */
parser_mem_page_t *free_page_p; /**< space for fast allocation */
} parser_stack_t;
/**
* Iterator for parser memory stack.
*/
typedef struct
{
parser_mem_page_t *current_p; /**< currently processed page */
size_t current_position; /**< current position on the page */
} parser_stack_iterator_t;
/**
* Branch type.
*/
typedef struct
{
parser_mem_page_t *page_p; /**< branch location page */
uint32_t offset; /**< branch location offset */
} parser_branch_t;
/**
* Branch chain type.
*/
typedef struct parser_branch_node_t
{
struct parser_branch_node_t *next_p; /**< next linked list node */
parser_branch_t branch; /**< branch */
} parser_branch_node_t;
#ifdef JERRY_DEBUGGER
/**
* Extra information for each breakpoint.
*/
typedef struct
{
uint32_t value; /**< line or offset of the breakpoint */
} parser_breakpoint_info_t;
#endif /* JERRY_DEBUGGER */
/**
* Those members of a context which needs
* to be saved when a sub-function is parsed.
*/
typedef struct parser_saved_context_t
{
/* Parser members. */
uint32_t status_flags; /**< parsing options */
uint16_t stack_depth; /**< current stack depth */
uint16_t stack_limit; /**< maximum stack depth */
struct parser_saved_context_t *prev_context_p; /**< last saved context */
parser_stack_iterator_t last_statement; /**< last statement position */
/* Literal types */
uint16_t argument_count; /**< number of function arguments */
uint16_t register_count; /**< number of registers */
uint16_t literal_count; /**< number of literals */
/* Memory storage members. */
parser_mem_data_t byte_code; /**< byte code buffer */
uint32_t byte_code_size; /**< byte code size for branches */
parser_mem_data_t literal_pool_data; /**< literal list */
#ifndef JERRY_NDEBUG
uint16_t context_stack_depth; /**< current context stack depth */
#endif /* !JERRY_NDEBUG */
} parser_saved_context_t;
/**
* Shared parser context.
*/
typedef struct
{
PARSER_TRY_CONTEXT (try_buffer); /**< try_buffer */
parser_error_t error; /**< error code */
void *allocated_buffer_p; /**< dinamically allocated buffer
* which needs to be freed on error */
uint32_t allocated_buffer_size; /**< size of the dinamically allocated buffer */
/* Parser members. */
uint32_t status_flags; /**< status flags */
uint16_t stack_depth; /**< current stack depth */
uint16_t stack_limit; /**< maximum stack depth */
parser_saved_context_t *last_context_p; /**< last saved context */
parser_stack_iterator_t last_statement; /**< last statement position */
/* Lexer members. */
lexer_token_t token; /**< current token */
lexer_lit_object_t lit_object; /**< current literal object */
const uint8_t *source_p; /**< next source byte */
const uint8_t *source_end_p; /**< last source byte */
parser_line_counter_t line; /**< current line */
parser_line_counter_t column; /**< current column */
/* Compact byte code members. */
cbc_argument_t last_cbc; /**< argument of the last cbc */
uint16_t last_cbc_opcode; /**< opcode of the last cbc */
/* Literal types */
uint16_t argument_count; /**< number of function arguments */
uint16_t register_count; /**< number of registers */
uint16_t literal_count; /**< number of literals */
/* Memory storage members. */
parser_mem_data_t byte_code; /**< byte code buffer */
uint32_t byte_code_size; /**< current byte code size for branches */
parser_list_t literal_pool; /**< literal list */
parser_mem_data_t stack; /**< storage space */
parser_mem_page_t *free_page_p; /**< space for fast allocation */
uint8_t stack_top_uint8; /**< top byte stored on the stack */
#ifndef JERRY_NDEBUG
/* Variables for debugging / logging. */
uint16_t context_stack_depth; /**< current context stack depth */
#endif /* !JERRY_NDEBUG */
#ifdef PARSER_DUMP_BYTE_CODE
int is_show_opcodes; /**< show opcodes */
uint32_t total_byte_code_size; /**< total byte code size */
#endif /* PARSER_DUMP_BYTE_CODE */
#ifdef JERRY_DEBUGGER
parser_breakpoint_info_t breakpoint_info[JERRY_DEBUGGER_SEND_MAX (parser_list_t)]; /**< extra data for breakpoints */
uint16_t breakpoint_info_count; /**< current breakpoint index */
parser_line_counter_t last_breakpoint_line; /**< last line where breakpoint was inserted */
#endif /* JERRY_DEBUGGER */
} parser_context_t;
/**
* @}
* @}
* @}
*
* \addtogroup mem Memory allocation
* @{
*
* \addtogroup mem_parser Parser memory manager
* @{
*/
/* Memory management.
* Note: throws an error if unsuccessful. */
void *parser_malloc (parser_context_t *context_p, size_t size);
void parser_free (void *ptr, size_t size);
void *parser_malloc_local (parser_context_t *context_p, size_t size);
void parser_free_local (void *ptr, size_t size);
/* Parser byte stream. */
void parser_cbc_stream_init (parser_mem_data_t *data_p);
void parser_cbc_stream_free (parser_mem_data_t *data_p);
void parser_cbc_stream_alloc_page (parser_context_t *context_p, parser_mem_data_t *data_p);
/* Parser list. Ensures pointer alignment. */
void parser_list_init (parser_list_t *list_p, uint32_t item_size, uint32_t item_count);
void parser_list_free (parser_list_t *list_p);
void parser_list_reset (parser_list_t *list_p);
void *parser_list_append (parser_context_t *context_p, parser_list_t *list_p);
void *parser_list_get (parser_list_t *list_p, size_t index);
void parser_list_iterator_init (parser_list_t *list_p, parser_list_iterator_t *iterator_p);
void *parser_list_iterator_next (parser_list_iterator_t *iterator_p);
/* Parser stack. Optimized for pushing bytes.
* Pop functions never throws error. */
void parser_stack_init (parser_context_t *context_p);
void parser_stack_free (parser_context_t *context_p);
void parser_stack_push_uint8 (parser_context_t *context_p, uint8_t uint8_value);
void parser_stack_pop_uint8 (parser_context_t *context_p);
void parser_stack_push_uint16 (parser_context_t *context_p, uint16_t uint16_value);
uint16_t parser_stack_pop_uint16 (parser_context_t *context_p);
void parser_stack_push (parser_context_t *context_p, const void *data_p, uint32_t length);
void parser_stack_pop (parser_context_t *context_p, void *data_p, uint32_t length);
void parser_stack_iterator_skip (parser_stack_iterator_t *iterator, size_t length);
void parser_stack_iterator_read (parser_stack_iterator_t *iterator, void *data_p, size_t length);
void parser_stack_iterator_write (parser_stack_iterator_t *iterator, const void *data_p, size_t length);
/**
* @}
* @}
*
* \addtogroup parser Parser
* @{
*
* \addtogroup jsparser JavaScript
* @{
*
* \addtogroup jsparser_utils Utility
* @{
*/
/* Compact byte code emitting functions. */
void parser_flush_cbc (parser_context_t *context_p);
void parser_emit_cbc (parser_context_t *context_p, uint16_t opcode);
void parser_emit_cbc_literal (parser_context_t *context_p, uint16_t opcode, uint16_t literal_index);
void parser_emit_cbc_literal_from_token (parser_context_t *context_p, uint16_t opcode);
void parser_emit_cbc_call (parser_context_t *context_p, uint16_t opcode, size_t call_arguments);
void parser_emit_cbc_push_number (parser_context_t *context_p, bool is_negative_number);
void parser_emit_cbc_forward_branch (parser_context_t *context_p, uint16_t opcode, parser_branch_t *branch_p);
parser_branch_node_t *parser_emit_cbc_forward_branch_item (parser_context_t *context_p, uint16_t opcode,
parser_branch_node_t *next_p);
void parser_emit_cbc_backward_branch (parser_context_t *context_p, uint16_t opcode, uint32_t offset);
void parser_set_branch_to_current_position (parser_context_t *context_p, parser_branch_t *branch_p);
void parser_set_breaks_to_current_position (parser_context_t *context_p, parser_branch_node_t *current_p);
void parser_set_continues_to_current_position (parser_context_t *context_p, parser_branch_node_t *current_p);
/* Convenience macros. */
#define parser_emit_cbc_ext(context_p, opcode) \
parser_emit_cbc ((context_p), PARSER_TO_EXT_OPCODE (opcode))
#define parser_emit_cbc_ext_literal(context_p, opcode, literal_index) \
parser_emit_cbc_literal ((context_p), PARSER_TO_EXT_OPCODE (opcode), (literal_index))
#define parser_emit_cbc_ext_call(context_p, opcode, call_arguments) \
parser_emit_cbc_call ((context_p), PARSER_TO_EXT_OPCODE (opcode), (call_arguments))
#define parser_emit_cbc_ext_forward_branch(context_p, opcode, branch_p) \
parser_emit_cbc_forward_branch ((context_p), PARSER_TO_EXT_OPCODE (opcode), (branch_p))
#define parser_emit_cbc_ext_backward_branch(context_p, opcode, offset) \
parser_emit_cbc_backward_branch ((context_p), PARSER_TO_EXT_OPCODE (opcode), (offset))
/**
* @}
*
* \addtogroup jsparser_lexer Lexer
* @{
*/
/* Lexer functions */
void lexer_next_token (parser_context_t *context_p);
void lexer_expect_identifier (parser_context_t *context_p, uint8_t literal_type);
void lexer_scan_identifier (parser_context_t *context_p, bool propety_name);
ecma_char_t lexer_hex_to_character (parser_context_t *context_p, const uint8_t *source_p, int length);
void lexer_expect_object_literal_id (parser_context_t *context_p, bool must_be_identifier);
void lexer_construct_literal_object (parser_context_t *context_p, lexer_lit_location_t *literal_p,
uint8_t literal_type);
bool lexer_construct_number_object (parser_context_t *context_p, bool push_number_allowed, bool is_negative_number);
void lexer_construct_function_object (parser_context_t *context_p, uint32_t extra_status_flags);
void lexer_construct_regexp_object (parser_context_t *context_p, bool parse_only);
bool lexer_compare_identifier_to_current (parser_context_t *context_p, const lexer_lit_location_t *right);
/**
* @}
*
* \addtogroup jsparser_expr Expression parser
* @{
*/
/* Parser functions. */
void parser_parse_expression (parser_context_t *context_p, int options);
/**
* @}
*
* \addtogroup jsparser_scanner Scanner
* @{
*/
void parser_scan_until (parser_context_t *context_p, lexer_range_t *range_p, lexer_token_type_t end_type);
/**
* @}
*
* \addtogroup jsparser_stmt Statement parser
* @{
*/
void parser_parse_statements (parser_context_t *context_p);
void parser_free_jumps (parser_stack_iterator_t iterator);
/**
* @}
*
* \addtogroup jsparser_parser Parser
* @{
*/
ecma_compiled_code_t *parser_parse_function (parser_context_t *context_p, uint32_t status_flags);
/* Error management. */
void parser_raise_error (parser_context_t *context_p, parser_error_t error);
/* Debug functions. */
#ifdef JERRY_DEBUGGER
void parser_append_breakpoint_info (parser_context_t *context_p, jerry_debugger_header_type_t type, uint32_t value);
void parser_send_breakpoints (parser_context_t *context_p, jerry_debugger_header_type_t type);
#endif /* JERRY_DEBUGGER */
/**
* @}
* @}
* @}
*/
#endif /* !JS_PARSER_INTERNAL_H */
Reference in New Issue View Git Blame Copy Permalink