I often get corrupted traces with clang world, the cause seems to be in rtld.
$ cd /usr/src/libexec/rtld-elf; env -i __MAKE_CONF=/dev/null TERM=$TERM sh $ make CC=gcc all install $ gdb yes [...] y y ^C Program received signal SIGINT, Interrupt. 0x00000008009455ac in write () from /lib/libc.so.7 (gdb) bt #0 0x00000008009455ac in write () from /lib/libc.so.7 #1 0x0000000800944fa7 in _swrite (fp=<value optimized out>, buf=<value optimized out>, n=<value optimized out>) at /usr/src/lib/libc/stdio/stdio.c:133 #2 0x0000000800944c7b in __fflush (fp=<value optimized out>) at /usr/src/lib/libc/stdio/fflush.c:123 #3 0x000000080094412d in __sfvwrite (fp=<value optimized out>, uio=<value optimized out>) at /usr/src/lib/libc/stdio/fvwrite.c:194 #4 0x000000080091c434 in puts (s=<value optimized out>) at /usr/src/lib/libc/stdio/puts.c:68 #5 0x00000000004005fa in main (argc=<value optimized out>, argv=find_location_expression: Corrupted DWARF expression. ) at /usr/src/usr.bin/yes/yes.c:54 $ touch rtld.c $ PATH=/usr/bin:$PATH make CC=clang all install $ gdb yes [...] y y ^C Program received signal SIGINT, Interrupt. 0x00000008009455ac in ?? () (gdb) bt #0 0x00000008009455ac in ?? () #1 0x0000000800944fa7 in ?? () #2 0x0000000000000002 in ?? () #3 0x000000080094d560 in ?? () #4 0x0000000800b73560 in ?? () #5 0x0000000800c08000 in ?? () #6 0x00007fffffffd160 in ?? () #7 0x0000000800944c7b in ?? () #8 0x0000000000000001 in ?? () #9 0x0000000000000001 in ?? () #10 0x0000000000000001 in ?? () #11 0x0000000800b73560 in ?? () #12 0x00007fffffffd1c0 in ?? () #13 0x000000080094412d in ?? () #14 0x00007fffffffc648 in ?? () #15 0x0000000000000001 in ?? () #16 0x0000000100400656 in ?? () #17 0x00007fffffffd1f8 in ?? () #18 0x00007fffffffd1f8 in ?? () #19 0x0000000000400656 in _fini () #20 0x00007fffffffd280 in ?? () #21 0x0000000000000000 in ?? () And compiling rtld with clang + -O0 makes it crash. -- FreeBSD 9.0-BETA1 r225055M amd64 _______________________________________________ freebsd-toolchain@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-toolchain To unsubscribe, send any mail to "freebsd-toolchain-unsubscr...@freebsd.org"