[Bug driver/81382] New: glibc deadlock in signal handler

marxin at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Mon Jul 10 14:58:00 GMT 2017 

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81382

            Bug ID: 81382
           Summary: glibc deadlock in signal handler
           Product: gcc
           Version: 7.0
               URL: https://bugzilla.suse.com/show_bug.cgi?id=1047882
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: driver
          Assignee: unassigned at gcc dot gnu.org
          Reporter: marxin at gcc dot gnu.org
  Target Milestone: ---

I have a stress tester which ends time to time in a deadlock:

#0  __lll_lock_wait_private () at
../sysdeps/unix/sysv/linux/x86_64/lowlevellock.S:95
#1  0x00002b872a9ce818 in _int_free (av=0x2b872acf3ae0 <main_arena>,
p=0x345f4d0, have_lock=0) at malloc.c:3969
#2  0x000000000127128a in
xcallocator<hash_map<mem_alloc_description<mem_usage>::mem_location_hash,
mem_usage*,
simple_hashmap_traits<default_hash_traits<mem_alloc_description<mem_usage>::mem_location_hash>,
mem_usage*> >::hash_entry>::data_free (memory=<optimized out>)
    at .././../gcc/hash-table.h:273
#3  hash_table<hash_map<mem_alloc_description<mem_usage>::mem_location_hash,
mem_usage*,
simple_hashmap_traits<default_hash_traits<mem_alloc_description<mem_usage>::mem_location_hash>,
mem_usage*> >::hash_entry, xcallocator>::~hash_table (this=0x345f4a0, 
    __in_chrg=<optimized out>) at .././../gcc/hash-table.h:628
#4  hash_map<mem_alloc_description<mem_usage>::mem_location_hash, mem_usage*,
simple_hashmap_traits<default_hash_traits<mem_alloc_description<mem_usage>::mem_location_hash>,
mem_usage*> >::~hash_map (this=0x345f4a0, __in_chrg=<optimized out>) at
.././../gcc/hash-map.h:26
#5  mem_alloc_description<mem_usage>::~mem_alloc_description (this=0x1c7c240
<hash_table_usage>, __in_chrg=<optimized out>) at .././../gcc/mem-stats.h:558
#6  0x00002b872a98a638 in __run_exit_handlers (status=status@entry=4,
listp=0x2b872acf35b8 <__exit_funcs>,
run_list_atexit=run_list_atexit@entry=true, run_dtors=run_dtors@entry=true) at
exit.c:83
#7  0x00002b872a98a68a in __GI_exit (status=status@entry=4) at exit.c:105
#8  0x00000000012729c7 in diagnostic_action_after_output
(context=context@entry=0x1c7c2c0 <global_diagnostic_context>,
diag_kind=diag_kind@entry=DK_ICE) at .././../gcc/diagnostic.c:522
#9  0x000000000127343d in error_recursion (context=0x1c7c2c0
<global_diagnostic_context>) at .././../gcc/diagnostic.c:1462
#10 diagnostic_report_diagnostic (context=0x1c7c2c0
<global_diagnostic_context>, diagnostic=diagnostic@entry=0x7fffecaac220) at
.././../gcc/diagnostic.c:903
#11 0x00000000012734bf in diagnostic_impl
(richloc=richloc@entry=0x7fffecaac2a0, opt=opt@entry=-1,
gmsgid=gmsgid@entry=0x137ea4e "%s", ap=ap@entry=0x7fffecaac288,
kind=kind@entry=DK_ICE) at .././../gcc/diagnostic.c:1099
#12 0x00000000012740e5 in internal_error (gmsgid=gmsgid@entry=0x137ea4e "%s")
at .././../gcc/diagnostic.c:1410
#13 0x0000000000b48d80 in crash_signal (signo=6) at .././../gcc/toplev.c:338
#14 <signal handler called>
#15 __GI_raise (sig=sig@entry=6) at ../sysdeps/unix/sysv/linux/raise.c:51
#16 0x00002b872a9890c6 in __GI_abort () at abort.c:78
#17 0x00002b872a9c68f1 in __libc_message (do_abort=do_abort@entry=2,
fmt=fmt@entry=0x2b872aac0b18 "*** Error in `%s': %s: 0x%s ***\n") at
../sysdeps/posix/libc_fatal.c:175
#18 0x00002b872a9ccf3b in malloc_printerr (action=<optimized out>,
str=0x2b872aac1210 "malloc(): memory corruption (fast)", ptr=<optimized out>,
ar_ptr=<optimized out>) at malloc.c:5077
#19 0x00002b872a9d0450 in _int_malloc (av=av@entry=0x2b872acf3ae0 <main_arena>,
bytes=bytes@entry=36) at malloc.c:3386
#20 0x00002b872a9d1678 in __GI___libc_malloc (bytes=bytes@entry=36) at
malloc.c:2890
#21 0x00000000012dbe90 in xrealloc (oldmem=oldmem@entry=0x0, size=36) at
.././../libiberty/xmalloc.c:177
#22 0x0000000001277bb6 in va_heap::reserve<(anonymous namespace)::layout_range>
(exact=true, reserve=<optimized out>, v=@0x7fffecaad0a0: 0x0) at
.././../gcc/vec.h:288
#23 vec<(anonymous namespace)::layout_range, va_heap, vl_ptr>::reserve
(exact=true, nelems=<optimized out>, this=0x7fffecaad0a0) at
.././../gcc/vec.h:1473
#24 vec<(anonymous namespace)::layout_range, va_heap, vl_ptr>::reserve_exact
(nelems=<optimized out>, this=0x7fffecaad0a0) at .././../gcc/vec.h:1493
#25 vec<(anonymous namespace)::layout_range, va_heap, vl_ptr>::create
(nelems=<optimized out>, this=0x7fffecaad0a0) at .././../gcc/vec.h:1508
#26 auto_vec<(anonymous namespace)::layout_range, 0>::auto_vec (n=<optimized
out>, this=0x7fffecaad0a0) at .././../gcc/vec.h:1320
#27 (anonymous namespace)::layout::layout (diagnostic_kind=<optimized out>,
richloc=0x7fffecaad1e0, context=0x1c7c2c0 <global_diagnostic_context>,
this=0x7fffecaad020) at .././../gcc/diagnostic-show-locus.c:776
#28 diagnostic_show_locus (context=context@entry=0x1c7c2c0
<global_diagnostic_context>, richloc=0x7fffecaad1e0, diagnostic_kind=<optimized
out>) at .././../gcc/diagnostic-show-locus.c:1815
#29 0x0000000000666468 in c_diagnostic_finalizer (context=0x1c7c2c0
<global_diagnostic_context>, diagnostic=0x7fffecaad160) at
.././../gcc/c-family/c-opts.c:166
#30 0x0000000001273119 in diagnostic_report_diagnostic (context=0x1c7c2c0
<global_diagnostic_context>, diagnostic=diagnostic@entry=0x7fffecaad160) at
.././../gcc/diagnostic.c:979
#31 0x00000000012734bf in diagnostic_impl
(richloc=richloc@entry=0x7fffecaad1e0, opt=opt@entry=-1,
gmsgid=gmsgid@entry=0x137ea4e "%s", ap=ap@entry=0x7fffecaad1c8,
kind=kind@entry=DK_ICE) at .././../gcc/diagnostic.c:1099
#32 0x00000000012740e5 in internal_error (gmsgid=gmsgid@entry=0x137ea4e "%s")
at .././../gcc/diagnostic.c:1410
#33 0x0000000000b48d80 in crash_signal (signo=11) at .././../gcc/toplev.c:338
#34 <signal handler called>
#35 __memmove_avx_unaligned_erms () at
../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:478
#36 0x000000000127614f in (anonymous namespace)::line_corrections::add_hint
(this=this@entry=0x7fffecaad9f0, hint=hint@entry=0x3489e20) at
.././../gcc/diagnostic-show-locus.c:1514
#37 0x0000000001278605 in (anonymous namespace)::layout::print_trailing_fixits
(row=<optimized out>, this=0x7fffecaada10) at
.././../gcc/diagnostic-show-locus.c:1558
#38 (anonymous namespace)::layout::print_line (row=<optimized out>,
this=0x7fffecaada10) at .././../gcc/diagnostic-show-locus.c:1780
#39 diagnostic_show_locus (context=context@entry=0x1c7c2c0
<global_diagnostic_context>, richloc=<optimized out>,
diagnostic_kind=<optimized out>) at .././../gcc/diagnostic-show-locus.c:1827
#40 0x0000000000666468 in c_diagnostic_finalizer (context=0x1c7c2c0
<global_diagnostic_context>, diagnostic=0x7fffecaadb50) at
.././../gcc/c-family/c-opts.c:166
#41 0x0000000001273119 in diagnostic_report_diagnostic (context=0x1c7c2c0
<global_diagnostic_context>, diagnostic=diagnostic@entry=0x7fffecaadb50) at
.././../gcc/diagnostic.c:979
#42 0x00000000012734bf in diagnostic_impl (richloc=<optimized out>, opt=288,
gmsgid=<optimized out>, ap=ap@entry=0x7fffecaadbb8, kind=kind@entry=DK_WARNING)
at .././../gcc/diagnostic.c:1099
#43 0x00000000012739b8 in warning_at_rich_loc (richloc=<optimized out>,
opt=opt@entry=288, gmsgid=gmsgid@entry=0x1309650 "missing braces around
initializer") at .././../gcc/diagnostic.c:1214
#44 0x00000000005c7e62 in pop_init_level (loc=loc@entry=66752,
implicit=implicit@entry=0,
braced_init_obstack=braced_init_obstack@entry=0x7fffecaadd30,
insert_before=insert_before@entry=66976) at .././../gcc/c/c-typeck.c:8069
#45 0x00000000005f332a in c_parser_braced_init
(parser=parser@entry=0x2b872ae9f000, type=type@entry=0x0,
nested_p=nested_p@entry=false, outer_obstack=outer_obstack@entry=0x0) at
.././../gcc/c/c-parser.c:4443
#46 0x00000000005f42dd in c_parser_initializer
(parser=parser@entry=0x2b872ae9f000) at .././../gcc/c/c-parser.c:4365
#47 0x00000000006015ce in c_parser_declaration_or_fndef
(parser=parser@entry=0x2b872ae9f000, fndef_ok=false, fndef_ok@entry=true,
static_assert_ok=static_assert_ok@entry=true, empty_ok=empty_ok@entry=true,
nested=nested@entry=false, 
    start_attr_ok=start_attr_ok@entry=true,
objc_foreach_object_declaration=<optimized out>, omp_declare_simd_clauses=...,
oacc_routine_data=<optimized out>, fallthru_attr_p=<optimized out>) at
.././../gcc/c/c-parser.c:1933
#48 0x000000000060a334 in c_parser_external_declaration (parser=0x2b872ae9f000)
at .././../gcc/c/c-parser.c:1470
#49 0x000000000060adaa in c_parser_translation_unit (parser=<optimized out>) at
.././../gcc/c/c-parser.c:1351
#50 c_parse_file () at .././../gcc/c/c-parser.c:18168
#51 0x0000000000669067 in c_common_parse_file () at
.././../gcc/c-family/c-opts.c:1104
#52 0x0000000000b48ddf in compile_file () at .././../gcc/toplev.c:468
#53 0x000000000057cff1 in do_compile () at .././../gcc/toplev.c:2021
#54 toplev::main (this=this@entry=0x7fffecaae14e, argc=<optimized out>,
argc@entry=23, argv=<optimized out>, argv@entry=0x7fffecaae248) at
.././../gcc/toplev.c:2155
#55 0x000000000057f3fb in main (argc=23, argv=0x7fffecaae248) at
.././../gcc/main.c:39

I've already discussed that slightly in openSUSE bugzilla and it shows that we
allocate a memory in a signal handler. Which is prohibited by glibc.

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