Ubuntu
mariadb-10.6 package

  1. Bug #1970634
  2. Comment #9

Comment 9 for bug 1970634

Revision history for this message
Daniel Black (daniel-black) wrote :

On the assembly generated by create_linux_aio (in the mariadbd packages in Ubuntu-22.04, 10.6.7-2:

(gdb) disassemble tpool::create_linux_aio,+200
Dump of assembler code from 0x5640cf2e1fb0 to 0x5640cf2e2078:
   0x00005640cf2e1fb0 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+0>: endbr64
   0x00005640cf2e1fb4 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+4>: push %rbp
   0x00005640cf2e1fb5 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+5>: mov %rsp,%rbp
   0x00005640cf2e1fb8 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+8>: push %r14
   0x00005640cf2e1fba <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+10>: mov %esi,%r14d
   0x00005640cf2e1fbd <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+13>: push %r13
   0x00005640cf2e1fbf <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+15>: mov %rdi,%r13
   0x00005640cf2e1fc2 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+18>: mov $0x158,%edi
   0x00005640cf2e1fc7 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+23>: push %r12
   0x00005640cf2e1fc9 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+25>: sub $0x8,%rsp
   0x00005640cf2e1fcd <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+29>: call 0x5640ceacb570 <_Znwm@plt>
   0x00005640cf2e1fd2 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+34>: mov %r14d,%edx
   0x00005640cf2e1fd5 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+37>: mov %r13,%rsi
   0x00005640cf2e1fd8 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+40>: mov %rax,%rdi
   0x00005640cf2e1fdb <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+43>: mov %rax,%r12
   0x00005640cf2e1fde <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+46>: call 0x5640cf2e1dd0 <(anonymous namespace)::aio_uring::aio_uring(tpool::thread_pool*, int)>
   0x00005640cf2e1fe3 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+51>: add $0x8,%rsp
   0x00005640cf2e1fe7 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+55>: mov %r12,%rax
   0x00005640cf2e1fea <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+58>: pop %r12
   0x00005640cf2e1fec <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+60>: pop %r13
   0x00005640cf2e1fee <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+62>: pop %r14
   0x00005640cf2e1ff0 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+64>: pop %rbp
   0x00005640cf2e1ff1 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+65>: ret
   0x00005640cf2e1ff2 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+66>: endbr64
   0x00005640cf2e1ff6 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+70>: mov %rax,%rdi
   0x00005640cf2e1ff9 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+73>: mov %rdx,%rax
   0x00005640cf2e1ffc <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+76>: jmp 0x5640ceb23308 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi-8121512>
   0x00005640cf2e2001 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+81>: endbr64
   0x00005640cf2e2005 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+85>: mov %rax,%r13
   0x00005640cf2e2008 <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+88>: mov %rdx,%r14
   0x00005640cf2e200b <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi+91>: jmp 0x5640ceb232fa <_ZN5tpool16create_linux_aioEPNS_11thread_poolEi.cold>
--Type <RET> for more, q to quit, c to continue without paging--c
   0x00005640cf2e2010 <_ZN5tpool19thread_pool_generic17create_native_aioEi+0>: endbr64
   0x00005640cf2e2014 <_ZN5tpool19thread_pool_generic17create_native_aioEi+4>: push %rbp
   0x00005640cf2e2015 <_ZN5tpool19thread_pool_generic17create_native_aioEi+5>: mov %rsp,%rbp
   0x00005640cf2e2018 <_ZN5tpool19thread_pool_generic17create_native_aioEi+8>: push %r14
   0x00005640cf2e201a <_ZN5tpool19thread_pool_generic17create_native_aioEi+10>: mov %esi,%r14d
   0x00005640cf2e201d <_ZN5tpool19thread_pool_generic17create_native_aioEi+13>: push %r13
   0x00005640cf2e201f <_ZN5tpool19thread_pool_generic17create_native_aioEi+15>: mov %rdi,%r13
   0x00005640cf2e2022 <_ZN5tpool19thread_pool_generic17create_native_aioEi+18>: mov $0x158,%edi
   0x00005640cf2e2027 <_ZN5tpool19thread_pool_generic17create_native_aioEi+23>: push %r12
   0x00005640cf2e2029 <_ZN5tpool19thread_pool_generic17create_native_aioEi+25>: sub $0x8,%rsp
   0x00005640cf2e202d <_ZN5tpool19thread_pool_generic17create_native_aioEi+29>: call 0x5640ceacb570 <_Znwm@plt>
   0x00005640cf2e2032 <_ZN5tpool19thread_pool_generic17create_native_aioEi+34>: mov %r14d,%edx
   0x00005640cf2e2035 <_ZN5tpool19thread_pool_generic17create_native_aioEi+37>: mov %r13,%rsi
   0x00005640cf2e2038 <_ZN5tpool19thread_pool_generic17create_native_aioEi+40>: mov %rax,%rdi
   0x00005640cf2e203b <_ZN5tpool19thread_pool_generic17create_native_aioEi+43>: mov %rax,%r12
   0x00005640cf2e203e <_ZN5tpool19thread_pool_generic17create_native_aioEi+46>: call 0x5640cf2e1dd0 <(anonymous namespace)::aio_uring::aio_uring(tpool::thread_pool*, int)>
   0x00005640cf2e2043 <_ZN5tpool19thread_pool_generic17create_native_aioEi+51>: add $0x8,%rsp
   0x00005640cf2e2047 <_ZN5tpool19thread_pool_generic17create_native_aioEi+55>: mov %r12,%rax
   0x00005640cf2e204a <_ZN5tpool19thread_pool_generic17create_native_aioEi+58>: pop %r12
   0x00005640cf2e204c <_ZN5tpool19thread_pool_generic17create_native_aioEi+60>: pop %r13
   0x00005640cf2e204e <_ZN5tpool19thread_pool_generic17create_native_aioEi+62>: pop %r14
   0x00005640cf2e2050 <_ZN5tpool19thread_pool_generic17create_native_aioEi+64>: pop %rbp
   0x00005640cf2e2051 <_ZN5tpool19thread_pool_generic17create_native_aioEi+65>: ret
   0x00005640cf2e2052 <_ZN5tpool19thread_pool_generic17create_native_aioEi+66>: endbr64
   0x00005640cf2e2056 <_ZN5tpool19thread_pool_generic17create_native_aioEi+70>: mov %rax,%rdi
   0x00005640cf2e2059 <_ZN5tpool19thread_pool_generic17create_native_aioEi+73>: mov %rdx,%rax
   0x00005640cf2e205c <_ZN5tpool19thread_pool_generic17create_native_aioEi+76>: jmp 0x5640ceb23334 <_ZN5tpool19thread_pool_generic17create_native_aioEi-8121564>
   0x00005640cf2e2061 <_ZN5tpool19thread_pool_generic17create_native_aioEi+81>: endbr64
   0x00005640cf2e2065 <_ZN5tpool19thread_pool_generic17create_native_aioEi+85>: mov %rax,%r13
   0x00005640cf2e2068 <_ZN5tpool19thread_pool_generic17create_native_aioEi+88>: mov %rdx,%r14
   0x00005640cf2e206b <_ZN5tpool19thread_pool_generic17create_native_aioEi+91>: jmp 0x5640ceb23326 <_ZN5tpool19thread_pool_generic17create_native_aioEi.cold>

My assembly knowledge isn't great, but after the call to (anonymous namespace)::aio_uring::aio_uring I'd expect some branching to identify the exception has occurred.

I tested a simplified version https://gist.github.com/grooverdan/f6d767a04ba5991ea2bf3de821e02e7b on https://godbolt.org/ and __cxa_begin_catch/__cxa_end_catch/_Unwind_Resume seem to be a standard part of exception handling.