Am 04.05.24 um 13:46 schrieb Bernhard Übelacker:
These end in some boost::asio functions: boost::asio::detail::scheduler::concurrency_hint() const at /usr/include/boost/asio/detail/scheduler.hpp:142
Forgot to attach how I got there: debugging.txt And for reference the upstream ticket: https://github.com/gqrx-sdr/gqrx/issues/1331
[17674.068551] gqrx[3226752]: segfault at f4 ip 00007f5fee944cd6 sp 00007f5f967f8870 error 4 [17674.068551] gqrx[3226753]: segfault at f4 ip 00007f5fee944cd6 sp 00007f5f95ff7870 error 4 in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068558] in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068557] traps: gqrx[3226749] general protection fault ip:7f5fee944cd6 sp:7f5f977fb7d0 error:0 [17674.068558] gqrx[3226751]: segfault at f4 ip 00007f5fee944cd6 sp 00007f5f96ff9870 error 4 [17674.068560] likely on CPU 9 (core 1, socket 0) [17674.068560] likely on CPU 10 (core 2, socket 0) [17674.068563] in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068562] Code: ec 78 64 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 80 bf c0 00 00 00 00 0f 85 ed 00 00 00 48 8b 45 30 48 8b 9d d0 00 00 00 <44> 8b b8 f4 00 00 00 48 85 db 0f 84 3a 01 00 00 48 8b 43 18 48 89 [17674.068563] Code: ec 78 64 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 80 bf c0 00 00 00 00 0f 85 ed 00 00 00 48 8b 45 30 48 8b 9d d0 00 00 00 <44> 8b b8 f4 00 00 00 48 85 db 0f 84 3a 01 00 00 48 8b 43 18 48 89 [17674.068564] in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068569] traps: gqrx[3226745] general protection fault ip:7f5fee944cd6 sp:7f5fbe7f99d0 error:0 [17674.068571] gqrx[3226754]: segfault at f4 ip 00007f5fee944cd6 sp 00007f5f957f6870 error 4 [17674.068575] in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068576] in libuhd.so.4.6.0[7f5fee721000+a5e000] [17674.068578] likely on CPU 12 (core 4, socket 0) [17674.068580] likely on CPU 14 (core 6, socket 0) [17674.068580] Code: ec 78 64 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 80 bf c0 00 00 00 00 0f 85 ed 00 00 00 48 8b 45 30 48 8b 9d d0 00 00 00 <44> 8b b8 f4 00 00 00 48 85 db 0f 84 3a 01 00 00 48 8b 43 18 48 89 [17674.068583] Code: ec 78 64 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 80 bf c0 00 00 00 00 0f 85 ed 00 00 00 48 8b 45 30 48 8b 9d d0 00 00 00 <44> 8b b8 f4 00 00 00 48 85 db 0f 84 3a 01 00 00 48 8b 43 18 48 89 https://wiki.debian.org/InterpretingKernelOutputAtProcessCrash error 4 == 0b00000100: * bit 0 == 0: no page found * bit 1 == 0: read access * bit 2 == 1: user-mode access echo -n "find /b ..., ..., 0x" && \ echo "ec 78 64 48 8b 04 25 28 00 00 00 48 89 44 24 68 31 c0 80 bf c0 00 00 00 00 0f 85 ed 00 00 00 48 8b 45 30 48 8b 9d d0 00 00 00 <44> 8b b8 f4 00 00 00 48 85 db 0f 84 3a 01 00 00 48 8b 43 18 48 89" \ | sed 's/[<>]//g' | sed 's/ /, 0x/g' # 2024-05-03 trixie/testing amd64 qemu VM apt dist-upgrade apt install systemd-coredump xserver-xorg slim jwm xterm gdb pipewire gqrx-sdr gqrx-sdr-dbgsym libuhd4.6.0-dbgsym systemctl start slim gdb -q set width 0 set pagination off file /usr/bin/gqrx tb main run pipe info target | grep -E "\.text.*libuhd" find /b 0x00007ffff43274a0, 0x00007ffff4d7ee0a, 0xec, 0x78, 0x64, 0x48, 0x8b, 0x04, 0x25, 0x28, 0x00, 0x00, 0x00, 0x48, 0x89, 0x44, 0x24, 0x68, 0x31, 0xc0, 0x80, 0xbf, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x85, 0xed, 0x00, 0x00, 0x00, 0x48, 0x8b, 0x45, 0x30, 0x48, 0x8b, 0x9d, 0xd0, 0x00, 0x00, 0x00, 0x44, 0x8b, 0xb8, 0xf4, 0x00, 0x00, 0x00, 0x48, 0x85, 0xdb, 0x0f, 0x84, 0x3a, 0x01, 0x00, 0x00, 0x48, 0x8b, 0x43, 0x18, 0x48, 0x89 b * (0x7ffff4544cac + 42) info b disassemble /r 0x7ffff4544cac, 0x7ffff4544cac + 62 benutzer@debian:~$ gdb -q (gdb) set width 0 (gdb) set pagination off (gdb) file /usr/bin/gqrx Reading symbols from /usr/bin/gqrx... Reading symbols from /usr/lib/debug/.build-id/99/990c9578178123477597a27d771c5793452e95.debug... (gdb) tb main Temporary breakpoint 1 at 0x9b8a0: file ./src/applications/gqrx/main.cpp, line 49. (gdb) run Starting program: /usr/bin/gqrx [Thread debugging using libthread_db enabled] Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1". [New Thread 0x7fffeea006c0 (LWP 18355)] [New Thread 0x7fffee0006c0 (LWP 18356)] [New Thread 0x7fffed6006c0 (LWP 18357)] [New Thread 0x7fffecc006c0 (LWP 18358)] [New Thread 0x7fffec2006c0 (LWP 18359)] [New Thread 0x7fffeb8006c0 (LWP 18360)] [New Thread 0x7fffeae006c0 (LWP 18361)] [New Thread 0x7fffea4006c0 (LWP 18362)] [New Thread 0x7fffe9a006c0 (LWP 18363)] [New Thread 0x7fffe90006c0 (LWP 18364)] Thread 1 "gqrx" hit Temporary breakpoint 1, main (argc=1, argv=0x7fffffffe488) at ./src/applications/gqrx/main.cpp:49 49 ./src/applications/gqrx/main.cpp: Datei oder Verzeichnis nicht gefunden. (gdb) pipe info target | grep -E "\.text.*libuhd" 0x00007ffff43274a0 - 0x00007ffff4d7ee0a is .text in /lib/x86_64-linux-gnu/libuhd.so.4.6.0 (gdb) find /b 0x00007ffff43274a0, 0x00007ffff4d7ee0a, 0xec, 0x78, 0x64, 0x48, 0x8b, 0x04, 0x25, 0x28, 0x00, 0x00, 0x00, 0x48, 0x89, 0x44, 0x24, 0x68, 0x31, 0xc0, 0x80, 0xbf, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x85, 0xed, 0x00, 0x00, 0x00, 0x48, 0x8b, 0x45, 0x30, 0x48, 0x8b, 0x9d, 0xd0, 0x00, 0x00, 0x00, 0x44, 0x8b, 0xb8, 0xf4, 0x00, 0x00, 0x00, 0x48, 0x85, 0xdb, 0x0f, 0x84, 0x3a, 0x01, 0x00, 0x00, 0x48, 0x8b, 0x43, 0x18, 0x48, 0x89 0x7ffff4544cac <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+28> 1 pattern found. (gdb) b * (0x7ffff4544cac + 42) Breakpoint 2 at 0x7ffff4544cd6: file /usr/include/boost/asio/detail/scheduler.hpp, line 142. (gdb) info b Num Type Disp Enb Address What 2 breakpoint keep y 0x00007ffff4544cd6 in boost::asio::detail::scheduler::concurrency_hint() const at /usr/include/boost/asio/detail/scheduler.hpp:142 (gdb) disassemble /r 0x7ffff4544cac, 0x7ffff4544cac + 62 Dump of assembler code from 0x7ffff4544cac to 0x7ffff4544cea: 0x00007ffff4544cac <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+28>: ec in (%dx),%al 0x00007ffff4544cad <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+29>: 78 64 js 0x7ffff4544d13 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+131> 0x00007ffff4544caf <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+31>: 48 8b 04 25 28 00 00 00 mov 0x28,%rax 0x00007ffff4544cb7 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+39>: 48 89 44 24 68 mov %rax,0x68(%rsp) 0x00007ffff4544cbc <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+44>: 31 c0 xor %eax,%eax 0x00007ffff4544cbe <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+46>: 80 bf c0 00 00 00 00 cmpb $0x0,0xc0(%rdi) 0x00007ffff4544cc5 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+53>: 0f 85 ed 00 00 00 jne 0x7ffff4544db8 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+296> 0x00007ffff4544ccb <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+59>: 48 8b 45 30 mov 0x30(%rbp),%rax 0x00007ffff4544ccf <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+63>: 48 8b 9d d0 00 00 00 mov 0xd0(%rbp),%rbx 0x00007ffff4544cd6 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+70>: 44 8b b8 f4 00 00 00 mov 0xf4(%rax),%r15d 0x00007ffff4544cdd <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+77>: 48 85 db test %rbx,%rbx 0x00007ffff4544ce0 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+80>: 0f 84 3a 01 00 00 je 0x7ffff4544e20 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+400> 0x00007ffff4544ce6 <_ZN5boost4asio6detail13epoll_reactor19register_descriptorEiRPNS2_16descriptor_stateE+86>: 48 8b 43 18 mov 0x18(%rbx),%rax End of assembler dump. (gdb) https://github.com/gqrx-sdr/gqrx/issues/1331 export DISPLAY=:0 systemctl --user start pipewire systemctl --user start pipewire-pulse gqrx
