------- Comment #4 from davek at gcc dot gnu dot org 2009-09-19 09:44 -------
Fortunately it even happens when using the stage1 compiler, which has usable
debug info:
(gdb) c 73
Will ignore next 72 crossings of breakpoint 1. Continuing.
Hardware watchpoint 1: dw2_string_counter
Old value = 73
New value = 74
gen_label_for_indirect_string (node=0x7ee82980)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:6849
6849 node->label = xstrdup (label);
(gdb) bt
#0 gen_label_for_indirect_string (node=0x7ee82980)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:6849
#1 0x007b00f3 in get_debug_string_label (str=0x7f15d578 "goto")
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:6862
#2 0x007b9d00 in mem_loc_descriptor (rtl=0x7f23f420, mode=VOIDmode,
initialized=VAR_INIT_STATUS_INITIALIZED)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:11610
#3 0x007ba7ba in loc_descriptor (rtl=0x7f23f420, mode=SImode,
initialized=VAR_INIT_STATUS_INITIALIZED)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:11968
#4 0x007ba0a5 in loc_descriptor (rtl=0x7ebdd810, mode=SImode,
initialized=VAR_INIT_STATUS_INITIALIZED)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:11742
#5 0x007bfd60 in add_location_or_const_value_attribute (die=0x7ef9fb58,
decl=0x7f004bc0, attr=DW_AT_location)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:13769
#6 0x007c7ea8 in gen_variable_die (decl=0x7f004bc0, origin=0x0,
context_die=0x7ef9c940) at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:16129
#7 0x007ccb2b in gen_decl_die (decl=0x7f004bc0, origin=0x0,
context_die=0x7ef9c940) at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:17388
#8 0x007cb12d in process_scope_var (stmt=0x7f01a020, decl=0x7f004bc0,
origin=0x0, context_die=0x7ef9c940)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:16990
#9 0x007cb1b0 in decls_for_scope (stmt=0x7f01a020, context_die=0x7ef9c940,
depth=0) at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:17012
#10 0x007c6df5 in gen_subprogram_die (decl=0x7f6af500, context_die=0x7fcb3f00)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:15853
#11 0x007cc80f in gen_decl_die (decl=0x7f6af500, origin=0x0,
context_die=0x7fcb3f00) at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:17323
#12 0x007cd881 in dwarf2out_decl (decl=0x7f6af500)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:17694
#13 0x013c68a5 in rest_of_handle_final ()
at /gnu/gcc/gcc-unpatched/gcc/final.c:4284
#14 0x00b9de10 in execute_one_pass (pass=0x24668e0)
at /gnu/gcc/gcc-unpatched/gcc/passes.c:1295
#15 0x00b9dfb0 in execute_pass_list (pass=0x24668e0)
at /gnu/gcc/gcc-unpatched/gcc/passes.c:1344
#16 0x00b9dfcc in execute_pass_list (pass=0x2464680)
at /gnu/gcc/gcc-unpatched/gcc/passes.c:1345
#17 0x00b9dfcc in execute_pass_list (pass=0x2464640)
at /gnu/gcc/gcc-unpatched/gcc/passes.c:1345
#18 0x012dfc0a in tree_rest_of_compilation (fndecl=0x7f6af500)
at /gnu/gcc/gcc-unpatched/gcc/tree-optimize.c:389
#19 0x00bbfccc in cgraph_expand_function (node=0x7f108b00)
at /gnu/gcc/gcc-unpatched/gcc/cgraphunit.c:1158
#20 0x00bbfe89 in cgraph_expand_all_functions ()
at /gnu/gcc/gcc-unpatched/gcc/cgraphunit.c:1217
#21 0x00bc0452 in cgraph_optimize ()
at /gnu/gcc/gcc-unpatched/gcc/cgraphunit.c:1440
#22 0x00bbf9a9 in cgraph_finalize_compilation_unit ()
at /gnu/gcc/gcc-unpatched/gcc/cgraphunit.c:1087
#23 0x00479c29 in c_write_global_declarations ()
at /gnu/gcc/gcc-unpatched/gcc/c-decl.c:9361
#24 0x00db0ca4 in compile_file () at /gnu/gcc/gcc-unpatched/gcc/toplev.c:1050
#25 0x00db2cbe in do_compile () at /gnu/gcc/gcc-unpatched/gcc/toplev.c:2382
#26 0x00db2d8c in toplev_main (argc=32, argv=0x8079df0)
at /gnu/gcc/gcc-unpatched/gcc/toplev.c:2424
#27 0x006281ed in main (argc=32, argv=0x8079df0)
at /gnu/gcc/gcc-unpatched/gcc/main.c:35
(gdb)
(gdb) print node[0]
$1 = {str = 0x7f23fe18 "goto", refcount = 1, form = 0, label = 0x0}
(gdb)
(gdb) up
#1 0x007b00f3 in get_debug_string_label (str=0x7f15d578 "goto")
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:6862
6862 gen_label_for_indirect_string (node);
(gdb) up
#2 0x007b9d00 in mem_loc_descriptor (rtl=0x7f23f420, mode=VOIDmode,
initialized=VAR_INIT_STATUS_INITIALIZED)
at /gnu/gcc/gcc-unpatched/gcc/dwarf2out.c:11610
11610 rtl = get_debug_string_label (XSTR (rtl, 0));
(gdb) call debug_rtx (rtl)
(const_string:SI ("goto"))
(gdb)
That's a touch odd.
ad...@ubik /gnu/gcc/gcc/gcc
$ grep -w goto java/expr.c
goto fail;
ad...@ubik /gnu/gcc/gcc/gcc
$
"goto fail" indeed. Why would a keyword end up as a debug info string?
(preprocessed source on the way)
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41404
