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Fix allocation problems when using import and export (#2919)

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Construct ecma_string only when there is no parser error using lit_object's index in parser_module_parse_export_caluse and parser_module_parse_import_clause
Fixes #2908

Co-authored-by: Tibor Dusnoki tdusnoki@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Adam Szilagyi aszilagy@inf.u-szeged.hu
This commit is contained in:
Szilagyi Adam
2019-06-21 14:21:08 +02:00
committed by Robert Fancsik
parent b707c3f8da
commit 7b65167e81
5 changed files with 99 additions and 19 deletions
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jerry-core/parser/js/js-parser-module.c
+35 -19
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@@ -327,11 +327,8 @@ parser_module_parse_export_clause (parser_context_t *context_p) /**< parser cont
lexer_construct_literal_object (context_p, &context_p->token.lit_location, LEXER_IDENT_LITERAL);
local_name_p = ecma_new_ecma_string_from_utf8 (context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
ecma_ref_ecma_string (local_name_p);
export_name_p = local_name_p;
uint16_t local_name_index = context_p->lit_object.index;
uint16_t export_name_index = PARSER_MAXIMUM_NUMBER_OF_LITERALS;
lexer_next_token (context_p);
if (context_p->token.type == LEXER_LITERAL
@@ -342,20 +339,30 @@ parser_module_parse_export_clause (parser_context_t *context_p) /**< parser cont
if (context_p->token.type != LEXER_LITERAL
|| context_p->token.lit_location.type != LEXER_IDENT_LITERAL)
{
ecma_deref_ecma_string (local_name_p);
ecma_deref_ecma_string (export_name_p);
parser_raise_error (context_p, PARSER_ERR_IDENTIFIER_EXPECTED);
}
lexer_construct_literal_object (context_p, &context_p->token.lit_location, LEXER_IDENT_LITERAL);
ecma_deref_ecma_string (local_name_p);
export_name_p = ecma_new_ecma_string_from_utf8 (context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
export_name_index = context_p->lit_object.index;
lexer_next_token (context_p);
}
lexer_literal_t *literal_p = PARSER_GET_LITERAL (local_name_index);
local_name_p = ecma_new_ecma_string_from_utf8 (literal_p->u.char_p, literal_p->prop.length);
if (export_name_index != PARSER_MAXIMUM_NUMBER_OF_LITERALS)
{
lexer_literal_t *as_literal_p = PARSER_GET_LITERAL (export_name_index);
export_name_p = ecma_new_ecma_string_from_utf8 (as_literal_p->u.char_p, as_literal_p->prop.length);
}
else
{
export_name_p = local_name_p;
ecma_ref_ecma_string (local_name_p);
}
if (parser_module_check_duplicate_export (context_p, export_name_p))
{
ecma_deref_ecma_string (local_name_p);
@@ -413,10 +420,8 @@ parser_module_parse_import_clause (parser_context_t *context_p) /**< parser cont
lexer_construct_literal_object (context_p, &context_p->token.lit_location, LEXER_IDENT_LITERAL);
local_name_p = ecma_new_ecma_string_from_utf8 (context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
ecma_ref_ecma_string (local_name_p);
import_name_p = local_name_p;
uint16_t import_name_index = context_p->lit_object.index;
uint16_t local_name_index = PARSER_MAXIMUM_NUMBER_OF_LITERALS;
lexer_next_token (context_p);
if (context_p->token.type == LEXER_LITERAL
@@ -427,19 +432,30 @@ parser_module_parse_import_clause (parser_context_t *context_p) /**< parser cont
if (context_p->token.type != LEXER_LITERAL
|| context_p->token.lit_location.type != LEXER_IDENT_LITERAL)
{
ecma_deref_ecma_string (local_name_p);
ecma_deref_ecma_string (import_name_p);
parser_raise_error (context_p, PARSER_ERR_IDENTIFIER_EXPECTED);
}
lexer_construct_literal_object (context_p, &context_p->token.lit_location, LEXER_IDENT_LITERAL);
ecma_deref_ecma_string (local_name_p);
local_name_p = ecma_new_ecma_string_from_utf8 (context_p->lit_object.literal_p->u.char_p,
context_p->lit_object.literal_p->prop.length);
local_name_index = context_p->lit_object.index;
lexer_next_token (context_p);
}
lexer_literal_t *literal_p = PARSER_GET_LITERAL (import_name_index);
import_name_p = ecma_new_ecma_string_from_utf8 (literal_p->u.char_p, literal_p->prop.length);
if (local_name_index != PARSER_MAXIMUM_NUMBER_OF_LITERALS)
{
lexer_literal_t *as_literal_p = PARSER_GET_LITERAL (local_name_index);
local_name_p = ecma_new_ecma_string_from_utf8 (as_literal_p->u.char_p, as_literal_p->prop.length);
}
else
{
local_name_p = import_name_p;
ecma_ref_ecma_string (local_name_p);
}
if (parser_module_check_duplicate_import (context_p, local_name_p))
{
ecma_deref_ecma_string (local_name_p);