Re: [PATCH] linux: Inline syscall cancellation to keep wrapper frames observable (BZ 34338)

Adhemerval Zanella Netto <[email protected]>
Newsgroups gmane.comp.lib.glibc.alpha
Organization Linaro
Message-ID <[email protected]>

On 19/07/26 08:29, Andreas K. Huettel wrote:
> Am Mittwoch, 1. Juli 2026, 04:09:25 Japanische Normalzeit schrieb Adhemerval Zanella:
>> The cancellable syscall wrappers end with a tail call to __syscall_cancel,
>> ithe wrapper frame is then elided, so when the syscall executes the wrapper
>> is no longer present on the stack.  Tools that unwind from CFI alone, such
>> as valgrind, perf and sampling profilers, cannot observe it. On gdb, it
>> only recovers it from DWARF call site information, which reduced-debuginfo
>> libc builds usually omit.
> 
> Let's postpone this now please. It's not critical and can be backported.

Sure, I recall that we decided to postpone it to next relase on last weekly call.
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