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* rseq and gdb
@ 2021-12-16 21:09 Mathieu Desnoyers
  2021-12-16 21:12 ` Florian Weimer
  0 siblings, 1 reply; 3+ messages in thread
From: Mathieu Desnoyers @ 2021-12-16 21:09 UTC (permalink / raw)
  To: Florian Weimer; +Cc: libc-alpha, Simon Marchi, gdb

Hi Florian,

I suspect that gdb should ideally do something to allow it to single-step
through rseq critical sections. In librseq [1], we emit the __rseq_cs_ptr_array
and __rseq_exit_point_array sections to allow gdb to know about rseq
critical sections and skip over those critical sections as needed. Otherwise
single-stepping over each instruction of a rseq critical section will loop

Now that glibc plans to enable rseq by default starting with glibc 2.35,
it appears to be a good timing to raise this topic with the gdb community.




Mathieu Desnoyers
EfficiOS Inc.

^ permalink raw reply	[flat|nested] 3+ messages in thread

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2021-12-16 21:09 rseq and gdb Mathieu Desnoyers
2021-12-16 21:12 ` Florian Weimer
2021-12-17 15:51   ` Simon Marchi

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