On 06/20, Andrii Nakryiko wrote: > This patchset adds the following APIs to allow attaching BPF programs to > tracing entities: > - bpf_program__attach_perf_event for attaching to any opened perf event FD, > allowing users full control; > - bpf_program__attach_kprobe for attaching to kernel probes (both entry and > return probes); > - bpf_program__attach_uprobe for attaching to user probes (both entry/return); > - bpf_program__attach_tracepoint for attaching to kernel tracepoints; > - bpf_program__attach_raw_tracepoint for attaching to raw kernel tracepoint > (wrapper around bpf_raw_tracepoint_open); > > This set of APIs makes libbpf more useful for tracing applications. > > Pre-patch #1 makes internal libbpf_strerror_r helper function work w/ negative > error codes, lifting the burder off callers to keep track of error sign. > Patch #2 adds attach_perf_event, which is the base for all other APIs. > Patch #3 adds kprobe/uprobe APIs. > Patch #4 adds tracepoint/raw_tracepoint APIs. > Patch #5 converts one existing test to use attach_perf_event. > Patch #6 adds new kprobe/uprobe tests. > Patch #7 converts all the selftests currently using tracepoint to new APIs. > > v1->v2: > - preserve errno before close() call (Stanislav); > - use libbpf_perf_event_disable_and_close in selftest (Stanislav); > - remove unnecessary memset (Stanislav); Reviewed-by: Stanislav Fomichev <sdf@xxxxxxxxxx> Thanks! > Andrii Nakryiko (7): > libbpf: make libbpf_strerror_r agnostic to sign of error > libbpf: add ability to attach/detach BPF to perf event > libbpf: add kprobe/uprobe attach API > libbpf: add tracepoint/raw tracepoint attach API > selftests/bpf: switch test to new attach_perf_event API > selftests/bpf: add kprobe/uprobe selftests > selftests/bpf: convert existing tracepoint tests to new APIs > > tools/lib/bpf/libbpf.c | 346 ++++++++++++++++++ > tools/lib/bpf/libbpf.h | 17 + > tools/lib/bpf/libbpf.map | 6 + > tools/lib/bpf/str_error.c | 2 +- > .../selftests/bpf/prog_tests/attach_probe.c | 151 ++++++++ > .../bpf/prog_tests/stacktrace_build_id.c | 49 +-- > .../bpf/prog_tests/stacktrace_build_id_nmi.c | 24 +- > .../selftests/bpf/prog_tests/stacktrace_map.c | 42 +-- > .../bpf/prog_tests/stacktrace_map_raw_tp.c | 14 +- > .../bpf/prog_tests/task_fd_query_rawtp.c | 10 +- > .../bpf/prog_tests/task_fd_query_tp.c | 51 +-- > .../bpf/prog_tests/tp_attach_query.c | 56 +-- > .../selftests/bpf/progs/test_attach_probe.c | 55 +++ > 13 files changed, 651 insertions(+), 172 deletions(-) > create mode 100644 tools/testing/selftests/bpf/prog_tests/attach_probe.c > create mode 100644 tools/testing/selftests/bpf/progs/test_attach_probe.c > > -- > 2.17.1 >
