[Bug symtab/30707] New: [gdb/symtab] corrupted double-linked list in gdb.base/index-cache.exp

[Bug symtab/30707] New: [gdb/symtab] corrupted double-linked list in gdb.base/index-cache.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30707

            Bug ID: 30707
           Summary: [gdb/symtab] corrupted double-linked list in
                    gdb.base/index-cache.exp
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: symtab
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

I build gdb on i686-linux native and ran the test-suite, and ran into:
...
(gdb) file
/home/netbook/gdb/build/gdb/testsuite/outputs/gdb.base/index-cache/index-cache^M
Reading symbols from
/home/netbook/gdb/build/gdb/testsuite/outputs/gdb.base/index-cache/index-cache...^M
*** Error in `/home/netbook/gdb/build/gdb/testsuite/../../gdb/gdb': corrupted
double-linked list: 0x09ec24d0 ***^M
^M
^M
Fatal signal: Aborted^M
----- Backtrace -----^M
0x819f226 gdb_internal_backtrace_1^M
        /home/netbook/gdb/src/gdb/bt-utils.c:122^M
0x819f226 _Z22gdb_internal_backtracev^M
        /home/netbook/gdb/src/gdb/bt-utils.c:168^M
0x82d9dad handle_fatal_signal^M
        /home/netbook/gdb/src/gdb/event-top.c:889^M
0x400b4403 ???^M
0x400b4428 ???^M
0x40799686 ???^M
0x4079cab2 ???^M
0x407d3fd2 ???^M
0x407de4c9 ???^M
0x407e0943 ???^M
0x407e19d7 ???^M
0x407ceeab ???^M
0x407d14aa ???^M
0x893f908 _bfd_real_fopen^M
        /home/netbook/gdb/src/bfd/bfdio.c:178^M
0x89404d9 bfd_open_file^M
        /home/netbook/gdb/src/bfd/cache.c:596^M
0x894057a bfd_cache_lookup_worker^M
        /home/netbook/gdb/src/bfd/cache.c:261^M
0x89408a9 cache_bseek^M
        /home/netbook/gdb/src/bfd/cache.c:289^M
0x893fdc6 bfd_seek^M
        /home/netbook/gdb/src/bfd/bfdio.c:459^M
0x8946359 _bfd_generic_get_section_contents^M
        /home/netbook/gdb/src/bfd/libbfd.c:1069^M
0x8684f0b _Z23gdb_bfd_scan_elf_dyntagiP3bfdPyS1_^M
        /home/netbook/gdb/src/gdb/solib.c:1602^M
0x867d3d6 elf_locate_base^M
        /home/netbook/gdb/src/gdb/solib-svr4.c:707^M
0x867d6fa svr4_iterate_over_objfiles_in_search_order^M
        /home/netbook/gdb/src/gdb/solib-svr4.c:3430^M
0x86dc33f find_main_name^M
        /home/netbook/gdb/src/gdb/symtab.c:6283^M
0x86e3818 _Z13main_languagev^M
        /home/netbook/gdb/src/gdb/symtab.c:6313^M
0x86ce4d3 _Z20set_initial_languagev^M
        /home/netbook/gdb/src/gdb/symfile.c:1700^M
0x86d535d _Z19symbol_file_commandPKci^M
        /home/netbook/gdb/src/gdb/symfile.c:1681^M
0x82de824 file_command^M
        /home/netbook/gdb/src/gdb/exec.c:554^M
0x81d29aa _Z8cmd_funcP16cmd_list_elementPKci^M
        /home/netbook/gdb/src/gdb/cli/cli-decode.c:2735^M
0x872b56b _Z15execute_commandPKci^M
        /home/netbook/gdb/src/gdb/top.c:575^M
0x82dab44 _Z15command_handlerPKc^M
        /home/netbook/gdb/src/gdb/event-top.c:552^M
0x82dbaf8 _Z20command_line_handlerOSt10unique_ptrIcN3gdb13xfree_deleterIcEEE^M
        /home/netbook/gdb/src/gdb/event-top.c:788^M
0x82d9fe2 gdb_rl_callback_handler^M
        /home/netbook/gdb/src/gdb/event-top.c:259^M
0x88162dd rl_callback_read_char^M
        /home/netbook/gdb/src/readline/readline/callback.c:290^M
0x82da1dd gdb_rl_callback_read_char_wrapper_noexcept^M
        /home/netbook/gdb/src/gdb/event-top.c:195^M
0x82da38e gdb_rl_callback_read_char_wrapper^M
        /home/netbook/gdb/src/gdb/event-top.c:234^M
0x8765e37 stdin_event_handler^M
        /home/netbook/gdb/src/gdb/ui.c:155^M
0x8d575ab handle_file_event^M
        /home/netbook/gdb/src/gdbsupport/event-loop.cc:573^M
0x8d57cb4 gdb_wait_for_event^M
        /home/netbook/gdb/src/gdbsupport/event-loop.cc:694^M
0x8d58407 _Z16gdb_do_one_eventi^M
        /home/netbook/gdb/src/gdbsupport/event-loop.cc:264^M
0x8435953 start_event_loop^M
        /home/netbook/gdb/src/gdb/main.c:412^M
0x8435953 captured_command_loop^M
        /home/netbook/gdb/src/gdb/main.c:476^M
0x84379b4 captured_main^M
        /home/netbook/gdb/src/gdb/main.c:1320^M
0x84379b4 _Z8gdb_mainP18captured_main_args^M
        /home/netbook/gdb/src/gdb/main.c:1339^M
0x806177a main^M
        /home/netbook/gdb/src/gdb/gdb.c:32^M
...

This is likely a dup of the thread sanitizer issues we're seeing in the
test-case, but filing it FTR.

In case it matter: ubuntu 14.04.6 i686, glibc 2.19.

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[Bug symtab/30707] [gdb/symtab] corrupted double-linked list in gdb.base/index-cache.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30707

--- Comment #1 from Tom de Vries <vries at gcc dot gnu.org> ---
Should be fixed by this series:
https://sourceware.org/pipermail/gdb-patches/2023-August/201270.html

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[Bug symtab/30707] [gdb/symtab] corrupted double-linked list in gdb.base/index-cache.exp

[vries at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=30707

Tom de Vries <vries at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |14.1
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #2 from Tom de Vries <vries at gcc dot gnu.org> ---
I retested at commit babce21 ("[gdb/testsuite] Extend gdb.base/index-cache.exp
further"), and this no longer occurs.

Fixed by one of the recent data race fixes.

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