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| author | Yonghong Song <yhs@fb.com> | 2018-04-28 22:28:13 -0700 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2018-04-29 08:45:54 -0700 |
| commit | 28dbf861deacb0321604bf1c5e1ccc34dd215669 (patch) | |
| tree | ae98045b9d24ea60e1034b08200d74e762dde8bb /tools/testing/selftests/bpf/trace_helpers.h | |
| parent | de2ff05f48afcde816ff4edb217417f62f624ab5 (diff) | |
| download | lwn-28dbf861deacb0321604bf1c5e1ccc34dd215669.tar.gz lwn-28dbf861deacb0321604bf1c5e1ccc34dd215669.zip | |
samples/bpf: move common-purpose trace functions to selftests
There is no functionality change in this patch. The common-purpose
trace functions, including perf_event polling and ksym lookup,
are moved from trace_output_user.c and bpf_load.c to
selftests/bpf/trace_helpers.c so that these function can
be reused later in selftests.
Acked-by: Alexei Starovoitov <ast@fb.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/testing/selftests/bpf/trace_helpers.h')
| -rw-r--r-- | tools/testing/selftests/bpf/trace_helpers.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/trace_helpers.h b/tools/testing/selftests/bpf/trace_helpers.h new file mode 100644 index 000000000000..fe3eefd21e86 --- /dev/null +++ b/tools/testing/selftests/bpf/trace_helpers.h @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#ifndef __TRACE_HELPER_H +#define __TRACE_HELPER_H + +struct ksym { + long addr; + char *name; +}; + +int load_kallsyms(void); +struct ksym *ksym_search(long key); + +typedef int (*perf_event_print_fn)(void *data, int size); + +/* return code for perf_event_print_fn */ +#define PERF_EVENT_DONE 0 +#define PERF_EVENT_ERROR -1 +#define PERF_EVENT_CONT -2 + +int perf_event_mmap(int fd); +/* return PERF_EVENT_DONE or PERF_EVENT_ERROR */ +int perf_event_poller(int fd, perf_event_print_fn output_fn); +#endif |