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Fix invalid assignment code generation. (#3695)

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This patch prevents assigning a value to a string literal after a this token.

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
This commit is contained in:
Zoltan Herczeg 2020-04-27 10:14:29 +02:00 committed by GitHub
parent e2807c28fa
commit daeee77d63
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GPG Key ID: 4AEE18F83AFDEB23
2 changed files with 44 additions and 24 deletions
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50
jerry-core/parser/js/js-parser-expr.c
View File

@ -2199,7 +2199,7 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
uint8_t assign_opcode = CBC_ASSIGN;
if (PARSER_IS_PUSH_LITERAL (context_p->last_cbc_opcode)
if (PARSER_IS_PUSH_LITERALS_WITH_THIS (context_p->last_cbc_opcode)
&& context_p->last_cbc.literal_type == LEXER_IDENT_LITERAL)
{
JERRY_ASSERT (CBC_SAME_ARGS (CBC_PUSH_LITERAL, assign_ident_opcode));
@ -2208,33 +2208,39 @@ parser_append_binary_single_assignment_token (parser_context_t *context_p, /**<
uint16_t literal_index;
if (context_p->last_cbc_opcode == CBC_PUSH_LITERAL)
switch (context_p->last_cbc_opcode)
{
literal_index = context_p->last_cbc.literal_index;
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_TWO_LITERALS)
{
literal_index = context_p->last_cbc.value;
context_p->last_cbc_opcode = CBC_PUSH_LITERAL;
}
else
{
JERRY_ASSERT (context_p->last_cbc_opcode == CBC_PUSH_THREE_LITERALS);
literal_index = context_p->last_cbc.third_literal_index;
context_p->last_cbc_opcode = CBC_PUSH_TWO_LITERALS;
case CBC_PUSH_LITERAL:
{
literal_index = context_p->last_cbc.literal_index;
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
break;
}
case CBC_PUSH_TWO_LITERALS:
{
literal_index = context_p->last_cbc.value;
context_p->last_cbc_opcode = CBC_PUSH_LITERAL;
break;
}
case CBC_PUSH_THIS_LITERAL:
{
literal_index = context_p->last_cbc.literal_index;
context_p->last_cbc_opcode = CBC_PUSH_THIS;
parser_flush_cbc (context_p);
break;
}
default:
{
JERRY_ASSERT (context_p->last_cbc_opcode == CBC_PUSH_THREE_LITERALS);
literal_index = context_p->last_cbc.third_literal_index;
context_p->last_cbc_opcode = CBC_PUSH_TWO_LITERALS;
break;
}
}
parser_stack_push_uint16 (context_p, literal_index);
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);
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));

18
tests/jerry/arithmetic-parse.js
View File

@ -42,5 +42,19 @@ parse ("a =% b");
parse ("c = a+");
parse ("c = a-");
parse("a++\n()")
parse("a--\n.b")
parse("a++\n()");
parse("a--\n.b");
function f() {
var a = 0;
function g() {}
try {
eval ("g(this, 'a' = 1)");
assert (false)
} catch (e) {
assert (e instanceof ReferenceError);
}
assert (a === 0);
}
f();