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| author | Nuoqi Gui <gnq25@mails.tsinghua.edu.cn> | 2026-09-04 12:41:55 +0200 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2026-09-04 12:24:25 -0700 |
| commit | 2b97956af60810cd382b86b9ce9aea421b889861 (patch) | |
| tree | 7d9b0d8a91f77e63deff23976f68555a4895346a /tools/lib/perf/libperf.map | |
| download | linux-stable-2b97956af60810cd382b86b9ce9aea421b889861.tar.gz linux-stable-2b97956af60810cd382b86b9ce9aea421b889861.zip | |
selftests/bpf: Test rhtab kptr cancellation semanticsgrafted
Resizable hash-map updates and deletions must not perform full special-field
destruction in their caller context. In particular, a referenced kptr must
remain attached to the allocation until the memory allocator destructor can
release it safely.
Add separate coverage for both affected paths. The update test stores a task
kptr, replaces the ordinary value bytes with BPF_EXIST, and verifies that the
kptr survived. The delete test removes an element and exchanges its kptr
through the still-valid map-value pointer before the allocation is reclaimed.
Both cases observe a NULL kptr when rhtab uses bpf_obj_free_fields(). They
recover and release the reference after rhtab switches to cancellation
semantics.
Signed-off-by: Nuoqi Gui <gnq25@mails.tsinghua.edu.cn>
[ kkd: Split update and delete coverage and rewrote the commit log ]
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Link: https://lore.kernel.org/r/20260904104203.345917-5-memxor@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/lib/perf/libperf.map')
| -rw-r--r-- | tools/lib/perf/libperf.map | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/tools/lib/perf/libperf.map b/tools/lib/perf/libperf.map new file mode 100644 index 000000000..fdd8304fe --- /dev/null +++ b/tools/lib/perf/libperf.map @@ -0,0 +1,62 @@ +LIBPERF_0.0.1 { + global: + libperf_init; + perf_cpu_map__new_any_cpu; + perf_cpu_map__new_online_cpus; + perf_cpu_map__get; + perf_cpu_map__put; + perf_cpu_map__new; + perf_cpu_map__nr; + perf_cpu_map__cpu; + perf_cpu_map__has_any_cpu_or_is_empty; + perf_cpu_map__is_any_cpu_or_is_empty; + perf_cpu_map__is_empty; + perf_cpu_map__has_any_cpu; + perf_cpu_map__min; + perf_cpu_map__max; + perf_cpu_map__has; + perf_thread_map__new_array; + perf_thread_map__new_dummy; + perf_thread_map__set_pid; + perf_thread_map__comm; + perf_thread_map__nr; + perf_thread_map__pid; + perf_thread_map__get; + perf_thread_map__put; + perf_evsel__new; + perf_evsel__delete; + perf_evsel__enable; + perf_evsel__disable; + perf_evsel__open; + perf_evsel__close; + perf_evsel__mmap; + perf_evsel__munmap; + perf_evsel__mmap_base; + perf_evsel__read; + perf_evsel__cpus; + perf_evsel__threads; + perf_evsel__attr; + perf_evlist__new; + perf_evlist__delete; + perf_evlist__open; + perf_evlist__close; + perf_evlist__enable; + perf_evlist__disable; + perf_evlist__add; + perf_evlist__remove; + perf_evlist__next; + perf_evlist__set_maps; + perf_evlist__poll; + perf_evlist__mmap; + perf_evlist__munmap; + perf_evlist__filter_pollfd; + perf_evlist__next_mmap; + perf_evlist__set_leader; + perf_mmap__consume; + perf_mmap__read_init; + perf_mmap__read_done; + perf_mmap__read_event; + perf_counts_values__scale; + local: + *; +}; |