https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93132
Bug ID: 93132
Summary: bogus `attribute((access))' warning when size-index is
specified
Product: gcc
Version: 10.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c
Assignee: unassigned at gcc dot gnu.org
Reporter: p...@gcc-bugzilla.mail.kapsi.fi
Target Milestone: ---
Created attachment 47580
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=47580&action=edit
Use formatted attribute specifier `attrspec', not the input one
Hi.
`append_access_attrs' at `gcc/c-family/c-attribs.c' has a slight issue when it
tries to match the size-index parameter:
3973 if (n2 && strncmp (attrstr + n1 + 1, pos + n1, n2))
The problem is that `attrstr' is the input / human-readable attribute string
(e.g. `attribute((__read_only__, 1, 2))' and not the formatted one (denoted by
`attrspec', e.g. `r0\01'). The corresponding warning message has this typo,
too, and it uses `atoi (attrstr + n1 + 1)' while it should of course use
`attrspec'.
Attached a proposed patch. As a side note, it's possibly a bit misleading that
the values in the warning message are one less than the given inputs; Perhaps
`atoi()' values should be incremented by one.
