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| author | Alexei Starovoitov <ast@kernel.org> | 2019-12-09 01:01:14 +0100 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2019-12-12 00:19:29 +0100 |
| commit | 7f193c2519a3dcfd61cd5e676b2959370f4b15be (patch) | |
| tree | 4791cb467f027a8f445513b02c738e67a9644740 /tools | |
| parent | bpf: Make BPF trampoline use register_ftrace_direct() API (diff) | |
| download | linux-7f193c2519a3dcfd61cd5e676b2959370f4b15be.tar.xz linux-7f193c2519a3dcfd61cd5e676b2959370f4b15be.zip | |
selftests/bpf: Test function_graph tracer and bpf trampoline together
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 <ast@kernel.org>
Acked-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20191209000114.1876138-4-ast@kernel.org
Diffstat (limited to 'tools')
| -rwxr-xr-x | tools/testing/selftests/bpf/test_ftrace.sh | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/tools/testing/selftests/bpf/test_ftrace.sh b/tools/testing/selftests/bpf/test_ftrace.sh new file mode 100755 index 000000000000..20de7bb873bc --- /dev/null +++ b/tools/testing/selftests/bpf/test_ftrace.sh @@ -0,0 +1,39 @@ +#!/bin/bash + +TR=/sys/kernel/debug/tracing/ +clear_trace() { # reset trace output + echo > $TR/trace +} + +disable_tracing() { # stop trace recording + echo 0 > $TR/tracing_on +} + +enable_tracing() { # start trace recording + echo 1 > $TR/tracing_on +} + +reset_tracer() { # reset the current tracer + echo nop > $TR/current_tracer +} + +disable_tracing +clear_trace + +echo "" > $TR/set_ftrace_filter +echo '*printk* *console* *wake* *serial* *lock*' > $TR/set_ftrace_notrace + +echo "bpf_prog_test*" > $TR/set_graph_function +echo "" > $TR/set_graph_notrace + +echo function_graph > $TR/current_tracer + +enable_tracing +./test_progs -t fentry +./test_progs -t fexit +disable_tracing +clear_trace + +reset_tracer + +exit 0 |