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Add a thread debugging flag TDB_BOUNDARY

Description

Add a thread debugging flag TDB_BOUNDARY

It indicates to a debugger that the thread is stopped at the
kernel->user exit path.

Reviewed by: markj
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Differential revision: https://reviews.freebsd.org/D37590

Details

Provenance
kibAuthored on Dec 1 2022, 12:29 AM
Reviewer
markj
Differential Revision
D37590: ptrace(2): add PT_SC_REMOTE remote syscall request
Parents
rGe6feeae2f915: sys: rename td_coredump to td_remotereq
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