This patch series makes the following changes: * Adds a new bpf helper `bpf_access_process_vm` to read user space memory from a different task. * Adds the ability to create sleepable bpf iterator programs. As an example of how this will be used, at Meta we are using bpf task iterator programs and this new bpf helper to read C++ async stack traces of a running process for debugging C++ binaries in production. Kenny Yu (3): bpf: Add bpf_access_process_vm() helper libbpf: Add "iter.s" section for sleepable bpf iterator programs selftests/bpf: Add test for sleepable bpf iterator programs include/linux/bpf.h | 1 + include/uapi/linux/bpf.h | 10 +++++ kernel/bpf/helpers.c | 19 ++++++++ kernel/trace/bpf_trace.c | 2 + tools/include/uapi/linux/bpf.h | 10 +++++ tools/lib/bpf/libbpf.c | 1 + .../selftests/bpf/prog_tests/bpf_iter.c | 16 +++++++ .../selftests/bpf/progs/bpf_iter_task.c | 43 +++++++++++++++++++ 8 files changed, 102 insertions(+) -- 2.30.2
