selftests/bpf: use canonical ftrace path

2023-03-14T04:51:30Z

The canonical location for the tracefs filesystem is at /sys/kernel/tracing. But, from Documentation/trace/ftrace.rst: Before 4.1, all ftrace tracing control files were within the debugfs file system, which is typically located at /sys/kernel/debug/tracing. For backward compatibility, when mounting the debugfs file system, the tracefs file system will be automatically mounted at: /sys/kernel/debug/tracing Many tests in the bpf selftest code still refer to this older debugfs path, so let's update them to avoid confusion. Signed-off-by: Ross Zwisler Acked-by: Michael S. Tsirkin Reviewed-by: Steven Rostedt (Google) Link: https://lore.kernel.org/r/20230313205628.1058720-3-zwisler@kernel.org Signed-off-by: Alexei Starovoitov

selftests/bpf: Test function_graph tracer and bpf trampoline together

2019-12-11T23:19:29Z

Add simple test script to execute funciton graph tracer while BPF trampoline attaches and detaches from the functions being graph traced. Signed-off-by: Alexei Starovoitov Acked-by: Daniel Borkmann Link: https://lore.kernel.org/bpf/20191209000114.1876138-4-ast@kernel.org

kernel/tools/testing/selftests/bpf/test_ftrace.sh, branch linux-rolling-stable

selftests/bpf: use canonical ftrace path

selftests/bpf: Test function_graph tracer and bpf trampoline together