This patch series is a rough attempt to support attach by name for uprobes and USDT (Userland Static Defined Tracing) probes. Currently attach for such probes is done by determining the offset manually, so the aim is to try and mimic the simplicity of kprobe attach, making use of uprobe opts. One restriction applies: uprobe attach supports system-wide probing by specifying "-1" for the pid. That functionality is not supported, since we need a running process to determine the base address to subtract to get the uprobe-friendly offset. There may be a way to do this without a running process, so any suggestions would be greatly appreciated. There are probably a bunch of subtleties missing here; the aim is to see if this is useful and if so hopefully we can refine it to deal with more complex cases. I tried to handle one case that came to mind - weak library symbols - but there are probably other issues when determining which address to use I haven't thought of. Alan Maguire (4): libbpf: support function name-based attach for uprobes libbpf: support usdt provider/probe name-based attach for uprobes selftests/bpf: add tests for u[ret]probe attach by name selftests/bpf: add test for USDT uprobe attach by name tools/lib/bpf/libbpf.c | 244 +++++++++++++++++++++ tools/lib/bpf/libbpf.h | 17 +- tools/testing/selftests/bpf/Makefile | 34 +++ .../selftests/bpf/prog_tests/attach_probe.c | 74 ++++++- .../selftests/bpf/progs/test_attach_probe.c | 24 ++ 5 files changed, 391 insertions(+), 2 deletions(-) -- 1.8.3.1
