Created attachment 15401 [details] crash backtrace While trying to debug a program with GDB, it was downloading debug symbols (`debuginfod enabled`), then I ran out of disk space and this probably corrupted those because now every time I try to debug it crashes gdb. ``` $ gdb program Reading symbols from program... Reading symbols from ~/.cache/debuginfod_client/xxx/debuginfo... (gdb) run Starting program: program Fatal signal: Segmentation fault ----- Backtrace ----- Fatal signal: Segmentation fault ----- Backtrace ----- Fatal signal: Segmentation fault ----- Backtrace ----- 0x649e00abd3cb ??? 0x649e00bd9e2d ??? 0x649e00bda02b ??? 0x7b693565a76f ??? 0x649e00bbe766 ??? 0x649e00bbf06f ??? 0x649e00bbf4e5 ??? 0x649e00fd8843 ??? 0x649e00b9d954 ??? 0x649e00bc301b ??? 0x649e00bd35ad ??? 0x649e00b508dc ??? 0x7b69356ae6ae ??? 0x649e00bcdc72 ??? 0x649e00b508dc ??? 0x7b69356ae6ae ??? 0x649e00bcd3c1 ??? 0x649e00fc3aeb ??? 'gdb program' terminated by signal SIGSEGV (Address boundary error) ``` ``` Thread 1 (Thread 0x7b69160006c0 (LWP 1036253)): #0 0x0000649e00fc4947 in backtrace_free_locked.part.0.lto_priv.0 (state=0x7b69366fa000, addr=0x7b692809cf70, size=26) at ../libbacktrace/../../libbacktrace/mmap.c:92 #1 0x0000649e00ffe666 in backtrace_free_locked (size=<optimized out>, addr=<optimized out>, state=<optimized out>) at ../libbacktrace/../../libbacktrace/mmap.c:226 #2 backtrace_free.isra.0 (state=0x7b69366fa000, addr=0x7b692809cf70, size=26, data=<optimized out>, error_callback=<optimized out>) at ../libbacktrace/../../libbacktrace/mmap.c:233 #3 0x0000649e00fc4eb6 in elf_try_debugfile (state=state@entry=0x7b69366fa000, prefix=prefix@entry=0x7b6928060f80 "/usr/bin/gdb", prefix_len=prefix_len@entry=9, prefix2=prefix2@entry=0x649e010be634 ".debug/", prefix2_len=prefix2_len@entry=7, debuglink_name=debuglink_name@entry=0x7b69280a3400 "gdb.debug", error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, data=0x0) at ../libbacktrace/../../libbacktrace/elf.c:941 #4 0x0000649e00fc5186 in elf_find_debugfile_by_debuglink (state=state@entry=0x7b69366fa000, filename=<optimized out>, filename@entry=0x649e010be7b5 "/proc/self/exe", debuglink_name=debuglink_name@entry=0x7b69280a3400 "gdb.debug", error_callback=error_callback@entry=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, data=data@entry=0x0) at ../libbacktrace/../../libbacktrace/elf.c:1038 #5 0x0000649e00fc8ee6 in elf_open_debugfile_by_debuglink (data=0x0, error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, debuglink_crc=1073138330, debuglink_name=0x7b69280a3400 "gdb.debug", filename=0x649e010be7b5 "/proc/self/exe", state=0x7b69366fa000) at ../libbacktrace/../../libbacktrace/elf.c:1075 #6 elf_add (state=0x7b69366fa000, filename=filename@entry=0x649e010be7b5 "/proc/self/exe", descriptor=22, memory=memory@entry=0x0, memory_size=memory_size@entry=0, base_address=110629777797120, error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, data=0x0, fileline_fn=0x7b68c0001fe0, found_sym=0x7b68c0002110, found_dwarf=0x7b68c0001fd8, fileline_entry=0x0, exe=0, debuginfo=0, with_buildid_data=0x0, with_buildid_size=0) at ../libbacktrace/../../libbacktrace/elf.c:4461 #7 0x0000649e00fcb13e in phdr_callback (info=info@entry=0x7b68c0002040, size=size@entry=64, pdata=pdata@entry=0x7b68c0002120) at ../libbacktrace/../../libbacktrace/elf.c:4848 #8 0x00007b6935771868 in __GI___dl_iterate_phdr (callback=0x649e00fcb0c0 <phdr_callback(dl_phdr_info*, size_t, void*)>, data=0x7b68c0002120) at dl-iteratephdr.c:74 #9 0x0000649e00fcaec8 in backtrace_initialize (fileline_fn=<synthetic pointer>, data=<optimized out>, error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, descriptor=22, filename=<optimized out>, state=0x7b69366fa000) at ../libbacktrace/../../libbacktrace/elf.c:4892 #10 fileline_initialize (data=<optimized out>, error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, state=0x7b69366fa000) at ../libbacktrace/../../libbacktrace/fileline.c:261 #11 backtrace_pcinfo (data=<optimized out>, error_callback=0x649e00abb990 <libbacktrace_error(void*, char const*, int)>, callback=<optimized out>, pc=<optimized out>, state=0x7b69366fa000) at ../libbacktrace/../../libbacktrace/fileline.c:295 #12 unwind (context=<optimized out>, vdata=0x7b68c0002420) at ../libbacktrace/../../libbacktrace/backtrace.c:91 #13 0x00007b69363a336d in _Unwind_Backtrace (trace=0x649e00fcac60 <unwind(_Unwind_Context*, void*)>, trace_argument=0x7b68c0002420) at /usr/src/debug/gcc/gcc/libgcc/unwind.inc:309 #14 0x0000649e00ffe5d4 in backtrace_full.constprop.0.isra.0 (state=0x7b69366fa000, data=0x0, error_callback=<optimized out>, callback=<optimized out>, skip=0) at ../libbacktrace/../../libbacktrace/backtrace.c:127 #15 0x0000649e00abd3cc in gdb_internal_backtrace_1 () at ../../gdb/bt-utils.c:122 #16 gdb_internal_backtrace () at ../../gdb/bt-utils.c:168 #17 gdb_internal_backtrace () at ../../gdb/bt-utils.c:154 #18 0x0000649e00bd9e2e in handle_fatal_signal (sig=sig@entry=11) at ../../gdb/event-top.c:889 #19 0x0000649e00bda02c in handle_sigsegv (sig=11) at ../../gdb/event-top.c:962 #20 <signal handler called> #21 0x0000649e00bbe766 in cooked_indexer::scan_attributes (this=this@entry=0x7b6915fff220, scanning_per_cu=scanning_per_cu@entry=0x649e02729d10, reader=reader@entry=0x7b68c01246d0, watermark_ptr=0x7b68e9dfca28 "", info_ptr=0x7b68e9dfca28 "", abbrev=0x0, name=0x7b6915fff110, linkage_name=0x7b6915fff108, flags=0x7b6915fff0e7, sibling_offset=0x0, parent_entry=0x7b6915fff0f0, maybe_defer=0x7b6915fff100, for_specification=true) at ../../gdb/dwarf2/read.c:16193 #22 0x0000649e00bbf070 in cooked_indexer::scan_attributes (this=this@entry=0x7b6915fff220, scanning_per_cu=<optimized out>, reader=reader@entry=0x7b6915fff260, watermark_ptr=<optimized out>, info_ptr=0x7b68e9ccc3aa "\r", abbrev=abbrev@entry=0x7b68c00706f0, name=<optimized out>, linkage_name=<optimized out>, flags=<optimized out>, sibling_offset=<optimized out>, parent_entry=<optimized out>, maybe_defer=<optimized out>, for_specification=<optimized out>) at ../../gdb/dwarf2/read.c:16374 #23 0x0000649e00bbf4e6 in cooked_indexer::index_dies (this=<optimized out>, reader=0x7b6915fff260, info_ptr=<optimized out>, parent_entry=0x0, fully=false) at ../../gdb/dwarf2/read.c:16528 #24 0x0000649e00fd8844 in cooked_indexer::make_index (reader=0x7b6915fff260, this=0x7b6915fff220) at ../../gdb/dwarf2/read.c:16651 #25 cooked_indexer::make_index(cutu_reader*) [clone .constprop.0] (this=0x7b6915fff220, reader=0x7b6915fff260) at ../../gdb/dwarf2/read.c:16645 #26 0x0000649e00b9d955 in process_psymtab_comp_unit (storage=0x7b6915fff1f0, per_objfile=<optimized out>, this_cu=0x649e02729d10) at ../../gdb/dwarf2/read.c:4851 #27 operator() (__closure=0x649e12737e80, iter=std::unique_ptr<dwarf2_per_cu_data> = {...}, end=std::unique_ptr<dwarf2_per_cu_data> = {...}) at ../../gdb/dwarf2/read.c:5144 #28 0x0000649e00bc301c in operator() (__closure=<optimized out>) at ../../gdb/../gdbsupport/parallel-for.h:273 #29 std::__invoke_impl<std::pair<std::unique_ptr<cooked_index_shard>, std::vector<gdb_exception> >, gdb::parallel_for_each<__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)> >(unsigned int, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)>, function_view<long unsigned int(__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >)>)::<lambda()>&> (__f=...) at /usr/include/c++/13.2.1/bits/invoke.h:61 #30 std::__invoke_r<std::pair<std::unique_ptr<cooked_index_shard>, std::vector<gdb_exception> >, gdb::parallel_for_each<__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)> >(unsigned int, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)>, function_view<long unsigned int(__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >)>)::<lambda()>&> (__fn=...) at /usr/include/c++/13.2.1/bits/invoke.h:116 #31 std::_Function_handler<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > >(), gdb::parallel_for_each<__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)> >(unsigned int, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, __gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >, dwarf2_build_psymtabs_hard(dwarf2_per_objfile*)::<lambda(iter_type, iter_type)>, function_view<long unsigned int(__gnu_cxx::__normal_iterator<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter>*, std::vector<std::unique_ptr<dwarf2_per_cu_data, dwarf2_per_cu_data_deleter> > >)>)::<lambda()> >::_M_invoke(const std::_Any_data &) (__functor=...) at /usr/include/c++/13.2.1/bits/std_function.h:291 #32 0x0000649e00bd35ae in std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::operator()() const (this=<optimized out>) at /usr/include/c++/13.2.1/bits/std_function.h:591 #33 std::__invoke_impl<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > >, std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&>(std::__invoke_other, std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&) (__f=...) at /usr/include/c++/13.2.1/bits/invoke.h:61 #34 std::__invoke_r<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > >, std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&>(std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&) (__fn=...) at /usr/include/c++/13.2.1/bits/invoke.h:116 #35 std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}::operator()() const (__closure=<optimized out>) at /usr/include/c++/13.2.1/future:1492 #36 std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >::operator()() const (this=<optimized out>) at /usr/include/c++/13.2.1/future:1409 #37 std::__invoke_impl<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >&>(std::__invoke_other, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >&) (__f=...) at /usr/include/c++/13.2.1/bits/invoke.h:61 #38 std::__invoke_r<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >&>(std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >&) (__fn=...) at /usr/include/c++/13.2.1/bits/invoke.h:116 #39 std::_Function_handler<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> (), std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > >, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run()::{lambda()#1}, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > > >::_M_invoke(std::_Any_data const&) (__functor=...) at /usr/include/c++/13.2.1/bits/std_function.h:291 #40 0x0000649e00b508dd in std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>::operator()() const (this=<optimized out>) at /usr/include/c++/13.2.1/bits/std_function.h:591 #41 std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*) (this=0x649e0288b100, __f=<optimized out>, __did_set=0x7b6915fff42f) at /usr/include/c++/13.2.1/future:589 #42 0x00007b69356ae6af in __pthread_once_slow (once_control=0x649e0288b118, init_routine=0x7b69358e0230 <std::__once_proxy()>) at pthread_once.c:116 #43 0x0000649e00bcdc73 in __gthread_once (__func=<optimized out>, __once=0x649e0288b118) at /usr/include/c++/13.2.1/x86_64-pc-linux-gnu/bits/gthr-default.h:700 #44 std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*>(std::once_flag&, void (std::__future_base::_State_baseV2::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*&&, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*&&, bool*&&) (__f=@0x7b6915fff450: (void (std::__future_base::_State_baseV2::*)(class std::__future_base::_State_baseV2 * const, class std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()> *, bool *)) 0x649e00b508b0 <std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*)>, __once=...) at /usr/include/c++/13.2.1/mutex:907 #45 std::__future_base::_State_baseV2::_M_set_result(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>, bool) (__ignore_failure=false, __res=..., this=0x649e0288b100) at /usr/include/c++/13.2.1/future:428 #46 std::__future_base::_Task_state<std::function<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::_M_run() (this=0x649e0288b100) at /usr/include/c++/13.2.1/future:1494 #47 std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>::operator()() (this=<optimized out>) at /usr/include/c++/13.2.1/future:1628 #48 std::__invoke_impl<void, std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&>(std::__invoke_other, std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&) (__f=...) at /usr/include/c++/13.2.1/bits/invoke.h:61 #49 std::__invoke_r<void, std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&>(std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>&) (__fn=...) at /usr/include/c++/13.2.1/bits/invoke.h:111 #50 std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}::operator()() const (__closure=<optimized out>) at /usr/include/c++/13.2.1/future:1491 #51 std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void>::operator()() const (this=0x7b6915fff5e0) at /usr/include/c++/13.2.1/future:1432 #52 std::__invoke_impl<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void>&>(std::__invoke_other, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void>&) (__f=...) at /usr/include/c++/13.2.1/bits/invoke.h:61 #53 std::__invoke_r<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void>&>(std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void>&) (__fn=...) at /usr/include/c++/13.2.1/bits/invoke.h:116 #54 std::_Function_handler<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> (), std::__future_base::_Task_setter<std::unique_ptr<std::__future_base::_Result<void>, std::__future_base::_Result_base::_Deleter>, std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run()::{lambda()#1}, void> >::_M_invoke(std::_Any_data const&) (__functor=...) at /usr/include/c++/13.2.1/bits/std_function.h:291 #55 0x0000649e00b508dd in std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>::operator()() const (this=<optimized out>) at /usr/include/c++/13.2.1/bits/std_function.h:591 #56 std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*) (this=0x649e03c09bf0, __f=<optimized out>, __did_set=0x7b6915fff58f) at /usr/include/c++/13.2.1/future:589 #57 0x00007b69356ae6af in __pthread_once_slow (once_control=0x649e03c09c08, init_routine=0x7b69358e0230 <std::__once_proxy()>) at pthread_once.c:116 #58 0x0000649e00bcd3c2 in __gthread_once (__func=<optimized out>, __once=<optimized out>) at /usr/include/c++/13.2.1/x86_64-pc-linux-gnu/bits/gthr-default.h:700 #59 std::call_once<void (std::__future_base::_State_baseV2::*)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*>(std::once_flag&, void (std::__future_base::_State_baseV2::*&&)(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*), std::__future_base::_State_baseV2*&&, std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*&&, bool*&&) (__f=@0x7b6915fff5b0: (void (std::__future_base::_State_baseV2::*)(class std::__future_base::_State_baseV2 * const, class std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter>()> *, bool *)) 0x649e00b508b0 <std::__future_base::_State_baseV2::_M_do_set(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>*, bool*)>, __once=...) at /usr/include/c++/13.2.1/mutex:907 #60 std::__future_base::_State_baseV2::_M_set_result(std::function<std::unique_ptr<std::__future_base::_Result_base, std::__future_base::_Result_base::_Deleter> ()>, bool) (__ignore_failure=false, __res=..., this=<optimized out>) at /usr/include/c++/13.2.1/future:428 #61 std::__future_base::_Task_state<std::packaged_task<std::pair<std::unique_ptr<cooked_index_shard, std::default_delete<cooked_index_shard> >, std::vector<gdb_exception, std::allocator<gdb_exception> > > ()>, std::allocator<int>, void ()>::_M_run() (this=0x649e03c09bf0) at /usr/include/c++/13.2.1/future:1494 #62 0x0000649e00fc3aec in std::packaged_task<void ()>::operator()() (this=0x7b6915fff670) at /usr/include/c++/13.2.1/future:1628 #63 gdb::thread_pool::thread_function (this=0x649e022f2910) at ../gdbsupport/../../gdbsupport/thread-pool.cc:242 #64 0x00007b69358e1943 in std::execute_native_thread_routine (__p=0x649e023758a0) at /usr/src/debug/gcc/gcc/libstdc++-v3/src/c++11/thread.cc:104 #65 0x00007b69356a955a in start_thread (arg=<optimized out>) at pthread_create.c:447 #66 0x00007b6935726a3c in clone3 () at ../sysdeps/unix/sysv/linux/x86_64/clone3.S:78 ``` ``` Dump of assembler code for function backtrace_free_locked.part.0.lto_priv.0: 0x0000649e00fc4910 <+0>: endbr64 0x0000649e00fc4914 <+4>: mov r11,QWORD PTR [rdi+0x40] 0x0000649e00fc4918 <+8>: test r11,r11 0x0000649e00fc491b <+11>: je 0x649e00fc49c1 <backtrace_free_locked.part.0.lto_priv.0+177> 0x0000649e00fc4921 <+17>: mov rax,QWORD PTR [r11] 0x0000649e00fc4924 <+20>: xor ecx,ecx 0x0000649e00fc4926 <+22>: lea r10,[rdi+0x40] 0x0000649e00fc492a <+26>: mov r8,r11 0x0000649e00fc492d <+29>: add rcx,0x1 0x0000649e00fc4931 <+33>: test rax,rax 0x0000649e00fc4934 <+36>: je 0x649e00fc49a8 <backtrace_free_locked.part.0.lto_priv.0+152> 0x0000649e00fc4936 <+38>: push rbx 0x0000649e00fc4937 <+39>: nop WORD PTR [rax+rax*1+0x0] 0x0000649e00fc4940 <+48>: mov r9,QWORD PTR [r10] 0x0000649e00fc4943 <+51>: mov rbx,QWORD PTR [r9+0x8] => 0x0000649e00fc4947 <+55>: cmp QWORD PTR [rax+0x8],rbx 0x0000649e00fc494b <+59>: jb 0x649e00fc4988 <backtrace_free_locked.part.0.lto_priv.0+120> 0x0000649e00fc494d <+61>: mov r8,rax ``` ``` rax 0x6e69622f7273752f 7955998172649846063 rbx 0xe80 3712 rcx 0x2 2 rdx 0x1a 26 rsi 0x7b692809cf70 135691573514096 rdi 0x7b69366fa000 135691815067648 rbp 0x1a 0x1a rsp 0x7b68c00014e0 0x7b68c00014e0 r8 0x7b692809cf70 135691573514096 r9 0x7b69280a6180 135691573551488 r10 0x7b69366fa040 135691815067712 r11 0x7b69280a6180 135691573551488 r12 0x7b692809cf70 135691573514096 r13 0x7 7 r14 0x10 16 r15 0x19 25 rip 0x649e00fc4947 0x649e00fc4947 <backtrace_free_locked.part.0.lto_priv.0+55> eflags 0x10202 [ IF RF ] cs 0x33 51 ss 0x2b 43 ds 0x0 0 es 0x0 0 fs 0x0 0 gs 0x0 0 fs_base 0x7b69160006c0 135691270883008 gs_base 0x0 0 ``` ``` (gdb) x $rax+0x8 0x6e69622f72737537: Cannot access memory at address 0x6e69622f72737537 ``` I can workaround this crash by disabling `debuginfod` or deleting `~/.cache/debuginfod_client` This crash was with gcc 13.2.1 20230801 I don't really know how to reproduce it but basically you need corrupted debuginfo files. Maybe can try repeat this with limited disk space for debuginfo.
Opps I wrote gcc, but I meant gdb 14.2
libdebuginfod or one of its dependencies might be mishandling or not checking for ENOMEM or some other error. This may be difficult to reproduce. Do you have an environment set up where 'gdb program' with debuginfod enabled reliably crashes when ~/.cache/debuginfod_client is removed? On the gdb side it looks like the crash happens when attempting to dereference a NULL abbrev_info ptr in cooked_indexer::scan_attributes. gdb should instead return early from this function when this ptr is NULL.
Created attachment 15402 [details] Crashing debuginfo (In reply to Aaron Merey from comment #2) > This may be difficult to reproduce. Do you have an environment set up where > 'gdb program' with debuginfod enabled reliably crashes when > ~/.cache/debuginfod_client is removed? No it doesn't crash if I remove `~/.cache/debuginfod_client` because issue is purely with some corrupted file there. I now narrowed it down to ~/.cache/debuginfod_client/c0b747f77ce7222a94ecae5e362d140fb5432461/debuginfo (attached here) I'm not sure if you can reproduce crash since it probably depends on exact program/libraries but you can try using Arch Linux, copying given debuginfo file and then running > DEBUGINFOD_URLS=https://debuginfod.archlinux.org gdb konsole -ex "set debuginfod enabled on" -ex "run" konsole is from KDE (pacman -S konsole)
IMO there's probably two bugs here: debuginfod should delete files in cases like this, but also the DWARF scanner shouldn't crash.
I have some other corrupted files aswell but those don't crash gdb. It just outputs bunch of > Dwarf Error: wrong version in compilation unit header (is 0, should be 2, 3, 4 or 5) [in module ~/.cache/debuginfod_client/xxx/debuginfo]
(In reply to Dāvis Mosāns from comment #5) > I have some other corrupted files aswell but those don't crash gdb. > It just outputs bunch of > > > Dwarf Error: wrong version in compilation unit header (is 0, should be 2, 3, 4 or 5) [in module ~/.cache/debuginfod_client/xxx/debuginfo] This is fine unless gdb is incorrect in saying so. The main thing with corrupted files is not to crash or have bad behavior. Ignoring the damage and continuing on is what should happen.
I posted a gdb patch to fix this crash: https://sourceware.org/pipermail/gdb-patches/2024-March/207250.html I also filed an elfutils bug for this issue: https://sourceware.org/bugzilla/show_bug.cgi?id=31480
Awesome! But note it wasn't due to low RAM but due to running out of disk space. That could be classified as bug since probably shouldn't leave half-written files on disk.
I'm on Arch too, I was able to reproduce the crash with the following steps: - install the kstatusnotifieritem package version 6.0.0-2 - copy the attached debuginfo file at ~/.cache/debuginfod_client/c0b747f77ce7222a94ecae5e362d140fb5432461/debuginfo - run `gdb /usr/lib/libKF6StatusNotifierItem.so.6.0.0` and answer yes when asked if I want to use debuginfod I guess that it should be possible to reproduce on other distros too by downloading the package [1] and extracting the so file. [1] https://archive.archlinux.org/packages/k/kstatusnotifieritem/kstatusnotifieritem-6.0.0-2-x86_64.pkg.tar.zst
(In reply to Simon Marchi from comment #9) > I guess that it should be possible to reproduce on other distros too by > downloading the package [1] and extracting the so file. For me just running gdb on the file was enough.
The master branch has been updated by Aaron Merey <amerey@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=aa35682ce5937c9fb9d936a29ef260b9916c8487 commit aa35682ce5937c9fb9d936a29ef260b9916c8487 Author: Aaron Merey <amerey@redhat.com> Date: Wed Mar 13 16:18:27 2024 -0400 gdb/dwarf2: Check for null abbrev_info ptr A corrupt debuginfo file can result in a null abbrev_info pointer being passed to cooked_indexer::scan_attributes. This pointer is set to nullptr by peek_die_abbrev when an abbrev of 0 is found. There is no check for whether the abbrev pointer is null and SIGSEGV occurs when attempting to dereference the pointer. An abbrev of 0 normally indicates that the corresponding DIE is a null entry, but scan_attributes expects a non-null DIE. Fix this by throwing an error in cooked_indexer::scan_attributes when peek_die_abbrev returns a nullptr in order to avoid scan_attributes calling itself with a null abbrev. Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=31478 Co-authored-by: Tom de Vries <tdevries@suse.de> Approved-By: Tom Tromey <tom@tromey.com>
I think this is fixed now.
The master branch has been updated by Tom de Vries <vries@sourceware.org>: https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6848938272157eb6532c189d6fcebec9d2dc33e8 commit 6848938272157eb6532c189d6fcebec9d2dc33e8 Author: Tom de Vries <tdevries@suse.de> Date: Tue Sep 24 10:50:44 2024 +0200 [gdb/symtab] Fix segfault on invalid debug info While looking at PR symtab/31478 (a problem in the cooked indexer with invalid dwarf) it occurred to me that I could trigger a similar problem using: ... Compilation Unit @ offset 0xb2: Length: 0x1f (32-bit) Version: 4 Abbrev Offset: 0x6c Pointer Size: 8 <0><bd>: Abbrev Number: 1 (DW_TAG_compile_unit) <be> DW_AT_language : 2 (non-ANSI C) <1><bf>: Abbrev Number: 2 (DW_TAG_subprogram) <c0> DW_AT_low_pc : 0x4004a7 <c8> DW_AT_high_pc : 0x4004b2 <d0> DW_AT_specification: <0xd5> <1><d4>: Abbrev Number: 0 Compilation Unit @ offset 0xd5: Length: 0x7 (32-bit) Version: 4 Abbrev Offset: 0x7f Pointer Size: 8 ... and indeed I get: ... $ gdb -q -batch outputs/gdb.dwarf2/dw2-inter-cu-error-2/dw2-inter-cu-error-2 Fatal signal: Segmentation fault ... The problem is that we're calling prepare_one_comp_unit with cu == nullptr and comp_unit_die == nullptr here in cooked_indexer::ensure_cu_exists: ... cutu_reader new_reader (per_cu, per_objfile, nullptr, nullptr, false, m_index_storage->get_abbrev_cache ()); prepare_one_comp_unit (new_reader.cu, new_reader.comp_unit_die, language_minimal); ... Fix this by bailing out for various types of dummy CUs: ... if (new_reader.dummy_p || new_reader.comp_unit_die == nullptr || !new_reader.comp_unit_die->has_children) return nullptr; ... Also make sure in scan_attributes that this triggers a dwarf error: ... $ gdb -q -batch dw2-inter-cu-error-2 DWARF Error: cannot follow reference to DIE at 0xd5 \ [in module dw2-inter-cu-error-2] ... With target board readnow, the test-case triggers an assertion failure in follow_die_offset, so fix this by throwing the same dwarf error. While we're at it, make the other check for dummy CUs in cooked_indexer::ensure_cu_exists more robust by adding an intermediate test for comp_unit_die: ... - if (result->dummy_p || !result->comp_unit_die->has_children) + if (result->dummy_p || result->comp_unit_die == nullptr + || !result->comp_unit_die->has_children) return nullptr; ... Tested on x86_64-linux. Approved-By: Tom Tromey <tom@tromey.com>