From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 4098 invoked by alias); 2 Feb 2009 23:43:36 -0000 Received: (qmail 4074 invoked by uid 48); 2 Feb 2009 23:43:22 -0000 Date: Mon, 02 Feb 2009 23:43:00 -0000 Message-ID: <20090202234322.4073.qmail@sourceware.org> X-Bugzilla-Reason: CC References: Subject: [Bug bootstrap/39025] ICE in start_function, at c-decl.c:6225 while configuring libgcc In-Reply-To: Reply-To: gcc-bugzilla@gcc.gnu.org To: gcc-bugs@gcc.gnu.org From: "ro at gcc dot gnu dot org" Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2009-02/txt/msg00151.txt.bz2 ------- Comment #1 from ro at gcc dot gnu dot org 2009-02-02 23:43 ------- It turns out that there are two problems here: * If you invoke cc1 conftest.c (i.e. without -quiet), you get the ICE from the assertion failure in c-decl.c:6225: /* This is the earliest point at which we might know the assembler name of the function. Thus, if it's set before this, die horribly. */ gcc_assert (!DECL_ASSEMBLER_NAME_SET_P (decl1)); decl1 has an assembler_name of "main" at this point, which is due to this change in toplev.c (announce_function): @@ -419,10 +432,7 @@ announce_function (tree decl) { if (!quiet_flag) { - if (rtl_dump_and_exit) - fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_NAME (decl))); - else - fprintf (stderr, " %s", lang_hooks.decl_printable_name (decl, 2)); + fprintf (stderr, "%s ", IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (decl))); fflush (stderr); pp_needs_newline (global_dc->printer) = true; diagnostic_set_last_function (global_dc, (diagnostic_info *) NULL); Unlike lang_hooks.decl_printable_name, decl_assembler_name sets assembler_name if unset, thus breaking the later assert. Since announce_functions gards this with !quiet_flag, it only breaks without that flag. * If instead on runs cc1 -g -quiet conftest.c (-g is necessary to trigger the bug which breaks configure, -quiet works around the first problem), on gets this instead. > ./cc1 -g -quiet conftest.c conftest.c:9: internal compiler error: Segmentation Fault Running cc1 under gdb reveals Program received signal SIGSEGV, Segmentation fault. 0x083fdd54 in get_personality_function (decl=0x0) at /vol/gcc/src/gcc-lto/gcc/expr.h:806 (gdb) where #0 0x083fdd54 in get_personality_function (decl=0x0) at /vol/gcc/src/gcc-lto/gcc/expr.h:806 #1 0x08404f08 in output_call_frame_info (for_eh=0) at /vol/gcc/src/gcc-lto/gcc/dwarf2out.c:2914 #2 0x08405fce in dwarf2out_frame_finish () at /vol/gcc/src/gcc-lto/gcc/dwarf2out.c:3351 #3 0x0899930a in compile_file () at /vol/gcc/src/gcc-lto/gcc/toplev.c:1023 #4 0x0899acc4 in do_compile () at /vol/gcc/src/gcc-lto/gcc/toplev.c:2220 #5 0x0899ad2b in toplev_main (argc=4, argv=0x80476cc) at /vol/gcc/src/gcc-lto/gcc/toplev.c:2252 #6 0x0821c2f9 in main (argc=4, argv=0x80476cc) at /vol/gcc/src/gcc-lto/gcc/main.c:35 I.e. get_personality_function is called with current_function_decl = NULL. -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=39025