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Implement proper creation of function arguments, let and const declarations. (#3725)

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After the rework it is possible to detect use before init errors for function arguments.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg
2020-05-12 14:38:17 +02:00
committed by GitHub
parent df7e303145
commit 4dc2cb3328
16 changed files with 729 additions and 218 deletions
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jerry-core/parser/js/js-parser-internal.h
+15 -8
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@@ -110,11 +110,12 @@ typedef enum
PARSER_PATTERN_TARGET_ON_STACK = (1u << 1), /**< assignment target is the topmost element on the stack */
PARSER_PATTERN_TARGET_DEFAULT = (1u << 2), /**< perform default value comparison for assignment target */
PARSER_PATTERN_NESTED_PATTERN = (1u << 3), /**< parse patter inside a pattern */
PARSER_PATTERN_LEXICAL = (1u << 4), /**< pattern is a lexical (let/const) declaration */
PARSER_PATTERN_LOCAL = (1u << 5), /**< pattern is a local (catch parameter) declaration */
PARSER_PATTERN_REST_ELEMENT = (1u << 6), /**< parse rest array initializer */
PARSER_PATTERN_ARGUMENTS = (1u << 7), /**< parse arguments binding */
PARSER_PATTERN_ARRAY = (1u << 8), /**< array pattern is being parsed */
PARSER_PATTERN_LET = (1u << 4), /**< pattern is a let declaration */
PARSER_PATTERN_CONST = (1u << 5), /**< pattern is a const declaration */
PARSER_PATTERN_LOCAL = (1u << 6), /**< pattern is a local (catch parameter) declaration */
PARSER_PATTERN_REST_ELEMENT = (1u << 7), /**< parse rest array initializer */
PARSER_PATTERN_ARGUMENTS = (1u << 8), /**< parse arguments binding */
PARSER_PATTERN_ARRAY = (1u << 9), /**< array pattern is being parsed */
} parser_pattern_flags_t;
/**
@@ -395,12 +396,17 @@ typedef struct
* Function statements with the name specified
* in map_from should not be copied to global scope.
*/
#define PARSER_SCOPE_STACK_NO_FUNCTION_COPY 0x4000
#define PARSER_SCOPE_STACK_NO_FUNCTION_COPY 0x8000
/**
* The scope stack item represents a const declaration
* The scope stack item represents a const binding stored in register
*/
#define PARSER_SCOPE_STACK_IS_CONST 0x8000
#define PARSER_SCOPE_STACK_IS_CONST_REG 0x4000
/**
* The scope stack item represents a binding which has already created with ECMA_VALUE_UNINITIALIZED
*/
#define PARSER_SCOPE_STACK_IS_LOCAL_CREATED (PARSER_SCOPE_STACK_IS_CONST_REG)
#endif /* ENABLED (JERRY_ES2015) */
@@ -753,6 +759,7 @@ void scanner_set_location (parser_context_t *context_p, scanner_location_t *loca
uint16_t scanner_decode_map_to (parser_scope_stack_t *stack_item_p);
#if ENABLED (JERRY_ES2015)
bool scanner_literal_is_const_reg (parser_context_t *context_p, uint16_t literal_index);
bool scanner_literal_is_created (parser_context_t *context_p, uint16_t literal_index);
#endif /* ENABLED (JERRY_ES2015) */
void scanner_scan_all (parser_context_t *context_p, const uint8_t *arg_list_p, const uint8_t *arg_list_end_p,