[Bug java/24120] New: jc1 incorrectly uses libiberty hashes

["kostikbel at ukr dot net" <gcc-bugzilla@gcc.gnu.org>]

(At least ) in gcc/java/jfc-io.c,
the memoized_dirlists hash is created by the call
 htab_create (37, htab_hash_string <-- NOTE THIS, memoized_dirlist_lookup_eq, NULL);
Actually, htab contains the structures (memoized_dirlist_entry), not the strings.

All went ok until hashtab.c decides it need to expand hash. Then,
libiberty/hashtab.c, htab_expand function tries to calculate hashes of hash entries
itself, calling htab_hash_string on elements of hash, that are not the strings,
but the structures.

When this happens, under right conditions jc1 crashes with SIGSEGV.
I found this on FreeBSD 6-CURRENT with debug malloc that fills uninitialized
storage with 0xd0. The problem is platform independent.

It seems that such code is present at least in 3.4.4, 4.0.2 and HEAD.

-- 
           Summary: jc1 incorrectly uses libiberty hashes
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: java
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: kostikbel at ukr dot net
                CC: gcc-bugs at gcc dot gnu dot org,java-prs at gcc dot gnu
                    dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=24120