tetragon: add sleepable uprobe sensor#4915
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It's not needed. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
At the moment we silently ignore when we match multiple entry points and just take the last one. Let's make sure we use proper entry point and fail in case there's more. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Adding support to detect sleepable tail calls with DetectSleepableTailCalls functions. Note also removing leftover debug print in detectMixBpfAndTailCalls. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Adding support for sensor to disable perf ringbuffer, so we could build sleepable sensor that does not support perf ringbuffer. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Add support for sensor to disable stacktrace, so we could build sleepable sensor that does not support builid stacktrace. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Adding support for sensor to disable preload, so we could build sleepable sensor without it, because it does not need it. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Adding sleepable uprobe objects: bpf_generic_uprobe_sleepable.o bpf_generic_retuprobe_sleepable.o bpf_multi_uprobe_sleepable.o bpf_multi_retuprobe_sleepable.o They are built with following macros enabled: __NO_PERF_RINGBUFFER __NO_STACKTRACE __NO_PRELOAD and allow sleepable retrieval of the data from uprobe. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Use bpf.DetectSleepableTailCalls() and allow to load sleepable uprobe sensor when it's possible. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Disable preload for sleepable sensor and use direct reading for strings. With preload disabled we no longer have extra 2 preload uprobes attached to the same offset. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
To allow disable sleepable uprobe sensor and prefer argument preload. Signed-off-by: Jiri Olsa <jolsa@kernel.org>
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