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| author | Benjamin Jacobs <freebsd@dev.thsi.be> | 2026-09-03 13:52:21 +0000 |
|---|---|---|
| committer | Mark Johnston <markj@FreeBSD.org> | 2026-09-03 15:05:03 +0000 |
| commit | c874d312e78fc60e6731a043fc45b47165618370 (patch) | |
| tree | 36cfbb30a7622b5100991bf66ea417d2c58488da /source/Target/ThreadPlanPython.cpp | |
| parent | 3e6bc5c3b5632ac9f55633b7d4e2e1a42b96a78b (diff) | |
dtrace/arm: Fix and de-pessimize dtrace_copy
Use an unprivileged load to access user memory from dtrace_copy, which
is running in SVC mode.
Abort the loop if the load is trapped, as it is useless, hence
wasteful, to keep faulting on successive addresses. I believe that
this de-pessimization should also be done on aarch64 and riscv.
PR: 298064
MFC after: 1 month
Reviewed by: markj
Differential Revision: https://reviews.freebsd.org/D59280
Diffstat (limited to 'source/Target/ThreadPlanPython.cpp')
0 files changed, 0 insertions, 0 deletions