[Bug gdb/31262] New: [gdb] ThreadSanitizer: data raceindex-cache.c:76 in index_cache::enable()

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From: "vries at gcc dot gnu.org" <sourceware-bugzilla@sourceware.org>
To: gdb-prs@sourceware.org
Subject: [Bug gdb/31262] New: [gdb] ThreadSanitizer: data raceindex-cache.c:76 in index_cache::enable()
Date: Thu, 18 Jan 2024 09:32:26 +0000	[thread overview]
Message-ID: <bug-31262-4717@http.sourceware.org/bugzilla/> (raw)

https://sourceware.org/bugzilla/show_bug.cgi?id=31262

            Bug ID: 31262
           Summary: [gdb] ThreadSanitizer: data raceindex-cache.c:76 in
                    index_cache::enable()
           Product: gdb
           Version: HEAD
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gdb
          Assignee: unassigned at sourceware dot org
          Reporter: vries at gcc dot gnu.org
  Target Milestone: ---

When building gdb with O0 fsanitize=thread, and running test-case
gdb.base/index-cache.exp, I get:
...
(gdb) PASS: gdb.base/index-cache.exp: test_basic_stuff: index-cache is disabled
by default
set index-cache enabled on
==================
[1m[31mWARNING: ThreadSanitizer: data race (pid=565983)
[1m[0m[1m[34m  Write of size 1 at 0x000003280448 by main thread:
[1m[0m    #0 index_cache::enable()
/home/vries/gdb/src/gdb/dwarf2/index-cache.c:76 (gdb+0x837634) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #1 set_index_cache_enabled_command
/home/vries/gdb/src/gdb/dwarf2/index-cache.c:294 (gdb+0x838104) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #2 bool setting::set<bool>(bool const&)
/home/vries/gdb/src/gdb/command.h:353 (gdb+0x709c10) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #3 do_set_command(char const*, int, cmd_list_element*)
/home/vries/gdb/src/gdb/cli/cli-setshow.c:414 (gdb+0x708530) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #4 execute_command(char const*, int) /home/vries/gdb/src/gdb/top.c:567
(gdb+0xff73cc) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #5 command_handler(char const*) /home/vries/gdb/src/gdb/event-top.c:566
(gdb+0x942488) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #6 command_line_handler(std::unique_ptr<char, gdb::xfree_deleter<char> >&&)
/home/vries/gdb/src/gdb/event-top.c:802 (gdb+0x942bc0) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #7 tui_command_line_handler /home/vries/gdb/src/gdb/tui/tui-interp.c:104
(gdb+0x10365f8) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #8 gdb_rl_callback_handler /home/vries/gdb/src/gdb/event-top.c:259
(gdb+0x941884) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #9 rl_callback_read_char
/home/vries/gdb/src/readline/readline/callback.c:290 (gdb+0x11a2c7c) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #10 gdb_rl_callback_read_char_wrapper_noexcept
/home/vries/gdb/src/gdb/event-top.c:195 (gdb+0x9415f8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #11 gdb_rl_callback_read_char_wrapper
/home/vries/gdb/src/gdb/event-top.c:234 (gdb+0x941720) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #12 stdin_event_handler /home/vries/gdb/src/gdb/ui.c:155 (gdb+0x1079320)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #13 handle_file_event /home/vries/gdb/src/gdbsupport/event-loop.cc:573
(gdb+0x1cf5678) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #14 gdb_wait_for_event /home/vries/gdb/src/gdbsupport/event-loop.cc:694
(gdb+0x1cf5d3c) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #15 gdb_do_one_event(int) /home/vries/gdb/src/gdbsupport/event-loop.cc:264
(gdb+0x1cf4074) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #16 start_event_loop /home/vries/gdb/src/gdb/main.c:408 (gdb+0xb79354)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #17 captured_command_loop /home/vries/gdb/src/gdb/main.c:472 (gdb+0xb79584)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #18 captured_main /home/vries/gdb/src/gdb/main.c:1342 (gdb+0xb7b99c)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #19 gdb_main(captured_main_args*) /home/vries/gdb/src/gdb/main.c:1361
(gdb+0xb7ba4c) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #20 main /home/vries/gdb/src/gdb/gdb.c:39 (gdb+0x423ce8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)

[1m[34m  Previous read of size 1 at 0x000003280448 by thread T5:
[1m[0m    #0 index_cache::enabled() const
/home/vries/gdb/src/gdb/dwarf2/index-cache.h:70 (gdb+0x8389a4) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #1 index_cache_store_context::index_cache_store_context(index_cache const&,
dwarf2_per_bfd*) /home/vries/gdb/src/gdb/dwarf2/index-cache.c:93 (gdb+0x837730)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #2
cooked_index::set_contents(std::vector<std::unique_ptr<cooked_index_shard,
std::default_delete<cooked_index_shard> >,
std::allocator<std::unique_ptr<cooked_index_shard,
std::default_delete<cooked_index_shard> > > >&&)
/home/vries/gdb/src/gdb/dwarf2/cooked-index.c:489 (gdb+0x7f6fec) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #3 cooked_index_worker::done_reading()
/home/vries/gdb/src/gdb/dwarf2/read.c:4901 (gdb+0x89e980) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #4 operator() /home/vries/gdb/src/gdb/dwarf2/read.c:4960 (gdb+0x89eb40)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #5 __invoke_impl<void, cooked_index_worker::do_reading()::<lambda()>&>
/usr/include/c++/13/bits/invoke.h:61 (gdb+0x8decb4) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #6 __invoke_r<void, cooked_index_worker::do_reading()::<lambda()>&>
/usr/include/c++/13/bits/invoke.h:111 (gdb+0x8dddec) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #7 _M_invoke /usr/include/c++/13/bits/std_function.h:290 (gdb+0x8db118)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #8 std::function<void ()>::operator()() const
/usr/include/c++/13/bits/std_function.h:591 (gdb+0x70c308) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #9 gdb::task_group::impl::~impl()
/home/vries/gdb/src/gdbsupport/task-group.cc:39 (gdb+0x1d03610) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #10 std::_Sp_counted_ptr<gdb::task_group::impl*,
(__gnu_cxx::_Lock_policy)2>::_M_dispose()
/usr/include/c++/13/bits/shared_ptr_base.h:428 (gdb+0x1d04690) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #11
std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release_last_use()
/usr/include/c++/13/bits/shared_ptr_base.h:175 (gdb+0x63bf20) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #12 std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release()
/usr/include/c++/13/bits/shared_ptr_base.h:361 (gdb+0x637758) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #13 std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count()
/usr/include/c++/13/bits/shared_ptr_base.h:1071 (gdb+0x63c0b8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #14 std::__shared_ptr<gdb::task_group::impl,
(__gnu_cxx::_Lock_policy)2>::~__shared_ptr()
/usr/include/c++/13/bits/shared_ptr_base.h:1524 (gdb+0x7fc9e8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #15 std::shared_ptr<gdb::task_group::impl>::~shared_ptr()
/usr/include/c++/13/bits/shared_ptr.h:175 (gdb+0x7fca20) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #16 ~<lambda> /home/vries/gdb/src/gdbsupport/task-group.cc:66
(gdb+0x1d026cc) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #17 _M_destroy /usr/include/c++/13/bits/std_function.h:175 (gdb+0x1d03228)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #18 _M_manager /usr/include/c++/13/bits/std_function.h:203 (gdb+0x1d0308c)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #19 _M_manager /usr/include/c++/13/bits/std_function.h:282 (gdb+0x1d02d5c)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #20 std::_Function_base::~_Function_base()
/usr/include/c++/13/bits/std_function.h:244 (gdb+0x431da4) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #21 std::function<void ()>::~function()
/usr/include/c++/13/bits/std_function.h:334 (gdb+0x432cac) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #22 std::__future_base::_Task_state<std::function<void ()>,
std::allocator<int>, void ()>::_Impl::~_Impl() /usr/include/c++/13/future:1511
(gdb+0x80f73c) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #23 std::__future_base::_Task_state<std::function<void ()>,
std::allocator<int>, void ()>::~_Task_state() /usr/include/c++/13/future:1477
(gdb+0x810494) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #24 void
std::__new_allocator<int>::destroy<std::__future_base::_Task_state<std::function<void
()>, std::allocator<int>, void ()>
>(std::__future_base::_Task_state<std::function<void ()>, std::allocator<int>,
void ()>*) /usr/include/c++/13/bits/new_allocator.h:198 (gdb+0x81062c)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #25 void std::allocator_traits<std::allocator<int>
>::destroy<std::__future_base::_Task_state<std::function<void ()>,
std::allocator<int>, void ()> >(std::allocator<int>&,
std::__future_base::_Task_state<std::function<void ()>, std::allocator<int>,
void ()>*) /usr/include/c++/13/bits/alloc_traits.h:558 (gdb+0x81062c)
    #26
std::_Sp_counted_ptr_inplace<std::__future_base::_Task_state<std::function<void
()>, std::allocator<int>, void ()>, std::allocator<int>,
(__gnu_cxx::_Lock_policy)2>::_M_dispose()
/usr/include/c++/13/bits/shared_ptr_base.h:613 (gdb+0x81062c)
    #27
std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release_last_use()
/usr/include/c++/13/bits/shared_ptr_base.h:175 (gdb+0x63bf20) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #28 std::_Sp_counted_base<(__gnu_cxx::_Lock_policy)2>::_M_release()
/usr/include/c++/13/bits/shared_ptr_base.h:361 (gdb+0x637758) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #29 std::__shared_count<(__gnu_cxx::_Lock_policy)2>::~__shared_count()
/usr/include/c++/13/bits/shared_ptr_base.h:1071 (gdb+0x63c0b8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #30 std::__shared_ptr<std::__future_base::_Task_state_base<void ()>,
(__gnu_cxx::_Lock_policy)2>::~__shared_ptr()
/usr/include/c++/13/bits/shared_ptr_base.h:1524 (gdb+0x8ebfd0) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #31 std::shared_ptr<std::__future_base::_Task_state_base<void ()>
>::~shared_ptr() /usr/include/c++/13/bits/shared_ptr.h:175 (gdb+0x8ec008)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #32 std::packaged_task<void ()>::~packaged_task()
/usr/include/c++/13/future:1594 (gdb+0x8ec16c) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #33 std::_Optional_payload_base<std::packaged_task<void ()> >::_M_destroy()
/usr/include/c++/13/optional:287 (gdb+0x1d10c94) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #34 std::_Optional_payload_base<std::packaged_task<void ()> >::_M_reset()
/usr/include/c++/13/optional:318 (gdb+0x1d0fe18) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #35 std::_Optional_payload<std::packaged_task<void ()>, false, false,
false>::~_Optional_payload() /usr/include/c++/13/optional:439 (gdb+0x1d0f500)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #36 std::_Optional_base<std::packaged_task<void ()>, false,
false>::~_Optional_base() /usr/include/c++/13/optional:510 (gdb+0x1d0ed88)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #37 std::optional<std::packaged_task<void ()> >::~optional()
/usr/include/c++/13/optional:705 (gdb+0x1d0ee0c) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #38 gdb::thread_pool::thread_function()
/home/vries/gdb/src/gdbsupport/thread-pool.cc:247 (gdb+0x1d0e82c) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #39 void std::__invoke_impl<void, void (gdb::thread_pool::*)(),
gdb::thread_pool*>(std::__invoke_memfun_deref, void (gdb::thread_pool::*&&)(),
gdb::thread_pool*&&) /usr/include/c++/13/bits/invoke.h:74 (gdb+0x1d12968)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #40 std::__invoke_result<void (gdb::thread_pool::*)(),
gdb::thread_pool*>::type std::__invoke<void (gdb::thread_pool::*)(),
gdb::thread_pool*>(void (gdb::thread_pool::*&&)(), gdb::thread_pool*&&)
/usr/include/c++/13/bits/invoke.h:96 (gdb+0x1d12804) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #41 void std::thread::_Invoker<std::tuple<void (gdb::thread_pool::*)(),
gdb::thread_pool*> >::_M_invoke<0ul, 1ul>(std::_Index_tuple<0ul, 1ul>)
/usr/include/c++/13/bits/std_thread.h:292 (gdb+0x1d126e4) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #42 std::thread::_Invoker<std::tuple<void (gdb::thread_pool::*)(),
gdb::thread_pool*> >::operator()() /usr/include/c++/13/bits/std_thread.h:299
(gdb+0x1d1266c) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #43 std::thread::_State_impl<std::thread::_Invoker<std::tuple<void
(gdb::thread_pool::*)(), gdb::thread_pool*> > >::_M_run()
/usr/include/c++/13/bits/std_thread.h:244 (gdb+0x1d12618) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #44 execute_native_thread_routine <null> (libstdc++.so.6+0xdda9c) (BuildId:
93e3778007c3847dd08373eb42577dc85c8750e4)

[1m[32m  Location is global 'global_index_cache' of size 48 at 0x000003280428
(gdb+0x3280448)

[1m[0m[1m[36m  Thread T5 'gdb worker' (tid=565994, running) created by main
thread at:
[1m[0m    #0 pthread_create <null> (libtsan.so.2+0x4605c) (BuildId:
fe872cc4563474b7ad67d63a019aa94e1e0df888)
    #1 std::thread::_M_start_thread(std::unique_ptr<std::thread::_State,
std::default_delete<std::thread::_State> >, void (*)()) <null>
(libstdc++.so.6+0xddbe4) (BuildId: 93e3778007c3847dd08373eb42577dc85c8750e4)
    #2 gdb::thread_pool::set_thread_count(unsigned long)
/home/vries/gdb/src/gdbsupport/thread-pool.cc:169 (gdb+0x1d0e4b4) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #3 update_thread_pool_size() /home/vries/gdb/src/gdb/maint.c:866
(gdb+0xb87c70) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #4 captured_main_1 /home/vries/gdb/src/gdb/main.c:1062 (gdb+0xb7a8a4)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #5 captured_main /home/vries/gdb/src/gdb/main.c:1332 (gdb+0xb7b998)
(BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #6 gdb_main(captured_main_args*) /home/vries/gdb/src/gdb/main.c:1361
(gdb+0xb7ba4c) (BuildId: 6dc308d9bc2da51d7adf979315fabd66fb46e8a3)
    #7 main /home/vries/gdb/src/gdb/gdb.c:39 (gdb+0x423ce8) (BuildId:
6dc308d9bc2da51d7adf979315fabd66fb46e8a3)

SUMMARY: ThreadSanitizer: data race
/home/vries/gdb/src/gdb/dwarf2/index-cache.c:76 in index_cache::enable()
==================
(gdb) FAIL: gdb.base/index-cache.exp: test_basic_stuff: enable index cache
...

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next             reply	other threads:[~2024-01-18  9:32 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2024-01-18  9:32 vries at gcc dot gnu.org [this message]
2024-01-18 12:37 ` [Bug gdb/31262] " vries at gcc dot gnu.org
2024-01-22 14:17 ` vries at gcc dot gnu.org
2024-01-22 20:33 ` tromey at sourceware dot org
2024-01-27 16:09 ` tromey at sourceware dot org
2024-01-28 16:33 ` tromey at sourceware dot org
2024-02-12 19:07 ` tromey at sourceware dot org
2024-03-09  0:27 ` cvs-commit at gcc dot gnu.org
2024-03-09  0:28 ` tromey at sourceware dot org
2024-05-17 14:17 ` tromey at sourceware dot org

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