Rather than scanning /proc and skipping PIDs based on their UIDs, use
BPF filters for uid filtering. The /proc scanning in thread_map is
racy as the PID may exit before the perf_event_open causing perf to
abort. BPF UID filters are more robust as they avoid the race. Add a
helper for commands that support UID filtering and wire up. Remove the
non-BPF UID filtering support given it doesn't work.
v2: Add a perf record uid test (Namhyung) and force setting
system-wide for perf trace and perf record (Namhyung). Ensure the
uid filter isn't set on tracepoint evsels.
v1: https://lore.kernel.org/lkml/20250111190143.1029906-1-irogers@xxxxxxxxxx/
Ian Rogers (12):
perf tests record: Cleanup improvements
perf bench evlist-open-close: Reduce scope of 2 variables
perf parse-events filter: Use evsel__find_pmu
perf target: Separate parse_uid into its own function
perf parse-events: Add parse_uid_filter helper
perf record: Switch user option to use BPF filter
perf tests record: Add basic uid filtering test
perf top: Switch user option to use BPF filter
perf trace: Switch user option to use BPF filter
perf bench evlist-open-close: Switch user option to use BPF filter
perf target: Remove uid from target
perf thread_map: Remove uid options
tools/perf/bench/evlist-open-close.c | 76 ++++++++++++---------
tools/perf/builtin-ftrace.c | 1 -
tools/perf/builtin-kvm.c | 2 -
tools/perf/builtin-record.c | 27 +++++---
tools/perf/builtin-stat.c | 4 +-
tools/perf/builtin-top.c | 22 +++---
tools/perf/builtin-trace.c | 27 +++++---
tools/perf/tests/backward-ring-buffer.c | 1 -
tools/perf/tests/event-times.c | 8 +--
tools/perf/tests/keep-tracking.c | 2 +-
tools/perf/tests/mmap-basic.c | 2 +-
tools/perf/tests/openat-syscall-all-cpus.c | 2 +-
tools/perf/tests/openat-syscall-tp-fields.c | 1 -
tools/perf/tests/openat-syscall.c | 2 +-
tools/perf/tests/perf-record.c | 1 -
tools/perf/tests/perf-time-to-tsc.c | 2 +-
tools/perf/tests/shell/record.sh | 36 ++++++++--
tools/perf/tests/switch-tracking.c | 2 +-
tools/perf/tests/task-exit.c | 1 -
tools/perf/tests/thread-map.c | 2 +-
tools/perf/util/bpf-filter.c | 2 +-
tools/perf/util/evlist.c | 3 +-
tools/perf/util/parse-events.c | 33 ++++++---
tools/perf/util/parse-events.h | 1 +
tools/perf/util/python.c | 10 +--
tools/perf/util/target.c | 54 ++-------------
tools/perf/util/target.h | 15 +---
tools/perf/util/thread_map.c | 32 +--------
tools/perf/util/thread_map.h | 6 +-
tools/perf/util/top.c | 4 +-
tools/perf/util/top.h | 1 +
31 files changed, 178 insertions(+), 204 deletions(-)
--
2.49.0.604.gff1f9ca942-goog
