Date: Fri, 20 Feb 2009 09:47:49 -0800 From: Mark Atkinson <atkin901@yahoo.com> To: freebsd-current@freebsd.org Subject: Re: memory alignment problems with -current on amd64? [Found Cause] Message-ID: <gnmqc8$3qa$1@ger.gmane.org> References: <gl7hu4$q7k$1@ger.gmane.org> <gmqbv1$jhe$1@ger.gmane.org> <gmsnin$qg9$1@ger.gmane.org> <ca3526250902110900r6e3703c2gf4f63678949a2e33@mail.gmail.com> <gmvmrb$hg2$1@ger.gmane.org> <ca3526250902120121s360a2a8fidad95e983385c891@mail.gmail.com> <gn1lh5$4b1$1@ger.gmane.org> <84dead720902121838p3a72f993xc1c52104c666ed0a@mail.gmail.com>
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Joseph Koshy wrote: >> example, my latest failure: >> peigen.c: In function '_bfd_pei_only_swap_filehdr_out': >> peigen.c:2089: internal compiler error: Bus error: 10 >> Please submit a full bug report, >> with preprocessed source if appropriate. > >> With an deliberately induced bus error, a program will dump core. > > You may need to specify option "-dH" if you want gcc to dump core on > error. See: contrib/gcc/diagnostic.[ch]. Very useful tip. after several tries I was able to get a core. However, I'm not sure how useful it is. The stack looks like it was blown out (gdb shows 1042 frames and complains after that, plus the addresses seem to be random garbage.) I changed CFLAGS to -O0 -dH cc -O0 -dH -DIN_GCC -DHAVE_CONFIG_H -DPREFIX=\"/usr/obj/usr/src/tmp/usr\" - I/usr/obj/usr/src/tmp/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools - I/usr/src/gnu/usr.bin/cc/cc_int/../cc_tools - I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc - I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/config - I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcclibs/include - I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcclibs/libcpp/include - I/usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcclibs/libdecnumber - I/usr/obj/usr/src/tmp/legacy/usr/include -c /usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/flow.c In file included from /usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/flow.c:133: /usr/src/gnu/usr.bin/cc/cc_int/../../../../contrib/gcc/flags.h:174: internal compiler error: Bus error: 10 cc: Internal error: Abort trap: 6 (program cc1) Please submit a full bug report. See <URL:http://gcc.gnu.org/bugs.html>; for instructions. (gdb) info registers rax 0x0 0 rbx 0x7fffffffdb3c 140737488345916 rcx 0x852f5c 8728412 rdx 0x0 0 rsi 0x6 6 rdi 0x5a2f 23087 rbp 0x7fffffffdbf0 0x7fffffffdbf0 rsp 0x7fffffffdb28 0x7fffffffdb28 r8 0xffffff000760f880 -1099387832192 r9 0x7fffffffdb18 140737488345880 r10 0x1 1 r11 0x206 518 r12 0x7fffffffdc00 140737488346112 r13 0x92b765 9615205 r14 0x8019fe060 34386993248 r15 0x0 0 rip 0x852f3c 0x852f3c eflags 0x246 582 cs 0x2b 43 ss 0x23 35 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 -- Mark Atkinson atkin901@yahoo.com (!wired)?(coffee++):(wired);
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