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gh-103656: Transfer f-string buffers to parser to avoid use-after-free (GH-103896)

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Co-authored-by: Pablo Galindo <pablogsal@gmail.com>
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Lysandros Nikolaou 2023-04-26 19:33:31 -06:00 • committed by GitHub
parent 76632b836c
commit 9169a56fad
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9 changed files with 146 additions and 66 deletions
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@ -881,14 +881,13 @@ fstring_middle[expr_ty]:
| fstring_replacement_field
| t=FSTRING_MIDDLE { _PyPegen_constant_from_token(p, t) }
fstring_replacement_field[expr_ty]:
| '{' a=(yield_expr | star_expressions) debug_expr="="? conversion=[fstring_conversion] format=[fstring_full_format_spec] '}' {
_PyPegen_formatted_value(p, a, debug_expr, conversion, format, EXTRA)
}
| '{' a=(yield_expr | star_expressions) debug_expr="="? conversion=[fstring_conversion] format=[fstring_full_format_spec] rbrace='}' {
_PyPegen_formatted_value(p, a, debug_expr, conversion, format, rbrace, EXTRA) }
| invalid_replacement_field
fstring_conversion[expr_ty]:
fstring_conversion[ResultTokenWithMetadata*]:
| conv_token="!" conv=NAME { _PyPegen_check_fstring_conversion(p, conv_token, conv) }
fstring_full_format_spec[expr_ty]:
| ':' spec=fstring_format_spec* { spec ? _PyAST_JoinedStr((asdl_expr_seq*)spec, EXTRA) : NULL }
fstring_full_format_spec[ResultTokenWithMetadata*]:
| colon=':' spec=fstring_format_spec* { _PyPegen_setup_full_format_spec(p, colon, (asdl_expr_seq *) spec, EXTRA) }
fstring_format_spec[expr_ty]:
| t=FSTRING_MIDDLE { _PyPegen_constant_from_token(p, t) }
| fstring_replacement_field