diff options
| author | Eduard Zingerman <eddyz87@gmail.com> | 2026-09-04 01:33:23 -0700 |
|---|---|---|
| committer | Kumar Kartikeya Dwivedi <memxor@gmail.com> | 2026-09-04 12:58:04 +0200 |
| commit | 836b2fe544a5e9b5ce116622cb36fba33838c6fd (patch) | |
| tree | 95e38e4aaa0a6a78e373148b3d0af4aa2ab3d371 /tools/perf/util/counts.h | |
| download | linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.tar.gz linux-stable-836b2fe544a5e9b5ce116622cb36fba33838c6fd.zip | |
selftests/bpf: Check that JMP32 pointer vs zero jumps are not predictedgrafted
Add jmp32_ptr_vs_zero_jne: the fall-through of the 32-bit compare, which
the verifier used to skip, contains an out of bounds map value access,
hence w/o the previous patch the program is accepted. See previous patch
for detailed description.
Reported-by: Nicholas Carlini <npc@anthropic.com>
Suggested-by: Nicholas Carlini <npc@anthropic.com>
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Link: https://lore.kernel.org/bpf/20260904083325.2083493-6-eddyz87@gmail.com
Signed-off-by: Kumar Kartikeya Dwivedi <memxor@gmail.com>
Diffstat (limited to 'tools/perf/util/counts.h')
| -rw-r--r-- | tools/perf/util/counts.h | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/tools/perf/util/counts.h b/tools/perf/util/counts.h new file mode 100644 index 000000000..42760242e --- /dev/null +++ b/tools/perf/util/counts.h @@ -0,0 +1,45 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __PERF_COUNTS_H +#define __PERF_COUNTS_H + +#include <linux/types.h> +#include <internal/xyarray.h> +#include <perf/evsel.h> +#include <stdbool.h> + +struct evsel; + +struct perf_counts { + s8 scaled; + struct xyarray *values; + struct xyarray *loaded; +}; + + +static inline struct perf_counts_values* +perf_counts(struct perf_counts *counts, int cpu_map_idx, int thread) +{ + return xyarray__entry(counts->values, cpu_map_idx, thread); +} + +static inline bool +perf_counts__is_loaded(struct perf_counts *counts, int cpu_map_idx, int thread) +{ + return *((bool *) xyarray__entry(counts->loaded, cpu_map_idx, thread)); +} + +static inline void +perf_counts__set_loaded(struct perf_counts *counts, int cpu_map_idx, int thread, bool loaded) +{ + *((bool *) xyarray__entry(counts->loaded, cpu_map_idx, thread)) = loaded; +} + +struct perf_counts *perf_counts__new(int ncpus, int nthreads); +void perf_counts__delete(struct perf_counts *counts); +void perf_counts__reset(struct perf_counts *counts); + +void evsel__reset_counts(struct evsel *evsel); +int evsel__alloc_counts(struct evsel *evsel); +void evsel__free_counts(struct evsel *evsel); + +#endif /* __PERF_COUNTS_H */ |