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Fix iterator step calculation for bracketed property expressions (#3678)

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This patch fixes #3665.

JerryScript-DCO-1.0-Signed-off-by: Robert Fancsik frobert@inf.u-szeged.hu
This commit is contained in:
Robert Fancsik
2020-04-20 19:32:59 +02:00
committed by GitHub
parent 9c7a699d10
commit b209e95daa
3 changed files with 47 additions and 38 deletions
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jerry-core/parser/js/js-parser-expr.c
+26 -38
View File
@@ -2178,8 +2178,10 @@ parser_process_unary_expression (parser_context_t *context_p, /**< context */
/**
* Append a binary '=' token.
*
* @return - pushed assignment opcode onto the parser stack
*/
static void
static uint8_t
parser_append_binary_single_assignment_token (parser_context_t *context_p, /**< context */
uint8_t assign_ident_opcode) /**< assign ident opcode */
{
@@ -2190,6 +2192,8 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
* assignment, since it has multiple forms depending on the
* previous instruction. */
uint8_t assign_opcode = CBC_ASSIGN;
if (PARSER_IS_PUSH_LITERAL (context_p->last_cbc_opcode)
&& context_p->last_cbc.literal_type == LEXER_IDENT_LITERAL)
{
@@ -2217,19 +2221,18 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
}
parser_stack_push_uint16 (context_p, literal_index);
parser_stack_push_uint8 (context_p, assign_ident_opcode);
assign_opcode = assign_ident_opcode;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_THIS_LITERAL)
{
context_p->last_cbc_opcode = CBC_PUSH_THIS;
parser_flush_cbc (context_p);
parser_stack_push_uint16 (context_p, context_p->last_cbc.literal_index);
parser_stack_push_uint8 (context_p, assign_ident_opcode);
assign_opcode = assign_ident_opcode;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_PROP)
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_PROP, CBC_ASSIGN));
parser_stack_push_uint8 (context_p, CBC_ASSIGN);
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_PROP_LITERAL)
@@ -2238,20 +2241,18 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_PROP_LITERAL, CBC_ASSIGN_PROP_LITERAL));
parser_stack_push_uint16 (context_p, context_p->last_cbc.literal_index);
parser_stack_push_uint8 (context_p, CBC_ASSIGN_PROP_LITERAL);
assign_opcode = CBC_ASSIGN_PROP_LITERAL;
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
}
else
{
context_p->last_cbc_opcode = CBC_PUSH_LITERAL;
parser_stack_push_uint8 (context_p, CBC_ASSIGN);
}
}
else if (context_p->last_cbc_opcode == CBC_PUSH_PROP_LITERAL_LITERAL)
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_PROP_LITERAL_LITERAL, CBC_PUSH_TWO_LITERALS));
context_p->last_cbc_opcode = CBC_PUSH_TWO_LITERALS;
parser_stack_push_uint8 (context_p, CBC_ASSIGN);
}
else if (context_p->last_cbc_opcode == CBC_PUSH_PROP_THIS_LITERAL)
{
@@ -2259,25 +2260,24 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_PROP_THIS_LITERAL, CBC_ASSIGN_PROP_THIS_LITERAL));
parser_stack_push_uint16 (context_p, context_p->last_cbc.literal_index);
parser_stack_push_uint8 (context_p, CBC_ASSIGN_PROP_THIS_LITERAL);
assign_opcode = CBC_ASSIGN_PROP_THIS_LITERAL;
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
}
else
{
context_p->last_cbc_opcode = CBC_PUSH_THIS_LITERAL;
parser_stack_push_uint8 (context_p, CBC_ASSIGN);
}
}
#if ENABLED (JERRY_ES2015)
else if (context_p->last_cbc_opcode == PARSER_TO_EXT_OPCODE (CBC_EXT_PUSH_SUPER_PROP_LITERAL))
{
context_p->last_cbc_opcode = PARSER_TO_EXT_OPCODE (CBC_EXT_SUPER_PROP_LITERAL_ASSIGNMENT_REFERENCE);
parser_stack_push_uint8 (context_p, CBC_ASSIGN_SUPER);
assign_opcode = CBC_ASSIGN_SUPER;
}
else if (context_p->last_cbc_opcode == PARSER_TO_EXT_OPCODE (CBC_EXT_PUSH_SUPER_PROP))
{
context_p->last_cbc_opcode = PARSER_TO_EXT_OPCODE (CBC_EXT_SUPER_PROP_ASSIGNMENT_REFERENCE);
parser_stack_push_uint8 (context_p, CBC_ASSIGN_SUPER);
assign_opcode = CBC_ASSIGN_SUPER;
}
#endif /* ENABLED (JERRY_ES2015) */
else
@@ -2288,10 +2288,12 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
#endif /* ENABLED (JERRY_ES2015) */
parser_emit_cbc_ext (context_p, CBC_EXT_THROW_REFERENCE_ERROR);
parser_stack_push_uint8 (context_p, CBC_ASSIGN);
}
parser_stack_push_uint8 (context_p, assign_opcode);
parser_stack_push_uint8 (context_p, LEXER_ASSIGN);
return assign_opcode;
} /* parser_append_binary_single_assignment_token */
/**
@@ -2606,7 +2608,15 @@ parser_pattern_form_assignment (parser_context_t *context_p, /**< context */
}
parser_stack_push_uint8 (context_p, LEXER_EXPRESSION_START);
parser_append_binary_single_assignment_token (context_p, assign_opcode);
assign_opcode = parser_append_binary_single_assignment_token (context_p, assign_opcode);
if (flags & PARSER_PATTERN_ARRAY)
{
int32_t stack_adjustment = (CBC_STACK_ADJUST_BASE - (cbc_flags[assign_opcode] >> CBC_STACK_ADJUST_SHIFT));
JERRY_ASSERT (stack_adjustment >= 1 && stack_adjustment <= 3);
rhs_opcode = (uint16_t) (rhs_opcode + stack_adjustment - 1);
}
parser_pattern_emit_rhs (context_p, rhs_opcode, literal_index);
@@ -2748,34 +2758,11 @@ parser_pattern_process_assignment (parser_context_t *context_p, /**< context */
else
{
parser_flush_cbc (context_p);
uint16_t stack_depth_before = context_p->stack_depth;
parser_parse_expression (context_p, PARSE_EXPR_NO_COMMA | PARSE_EXPR_LEFT_HAND_SIDE);
if (!PARSER_IS_PUSH_LITERAL (context_p->last_cbc_opcode))
if (!PARSER_IS_PUSH_LITERAL (context_p->last_cbc_opcode) && !PARSER_IS_PUSH_PROP (context_p->last_cbc_opcode))
{
if (!PARSER_IS_PUSH_PROP (context_p->last_cbc_opcode))
{
parser_raise_error (context_p, PARSER_ERR_INVALID_DESTRUCTURING_PATTERN);
}
if (end_type == LEXER_RIGHT_SQUARE)
{
/* LHS expression parsing may increases the stack depth, therefore rhs opcode may transforms:
Example: [a.b.c]
CBC_EXT_ITERATOR_STEP -> CBC_EXT_ITERATOR_STEP_2
CBC_EXT_REST_INITIALIZER -> CBC_EXT_ITERATOR_STEP_2 */
uint16_t stack_difference = (uint16_t) (context_p->stack_depth - stack_depth_before);
if (context_p->last_cbc_opcode == CBC_PUSH_PROP_LITERAL_LITERAL)
{
/* Example: [a.b]
CBC_EXT_ITERATOR_STEP -> CBC_EXT_ITERATOR_STEP_3
CBC_EXT_REST_INITIALIZER -> CBC_EXT_ITERATOR_STEP_3 */
PARSER_PLUS_EQUAL_U16 (stack_difference, 2);
}
PARSER_PLUS_EQUAL_U16 (rhs_opcode, stack_difference);
}
parser_raise_error (context_p, PARSER_ERR_INVALID_DESTRUCTURING_PATTERN);
}
}
@@ -2790,6 +2777,7 @@ parser_parse_array_initializer (parser_context_t *context_p, /**< context */
parser_pattern_flags_t flags) /**< flags */
{
parser_pattern_end_marker_t end_pos = parser_pattern_get_target (context_p, flags);
flags |= PARSER_PATTERN_ARRAY;
lexer_next_token (context_p);
parser_emit_cbc_ext (context_p, CBC_EXT_GET_ITERATOR);
jerry-core/parser/js/js-parser-internal.h
+1
View File
@@ -112,6 +112,7 @@ typedef enum
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_flags_t;
/**