From: Alexei Starovoitov <ast@kernel.org>
To: <davem@davemloft.net>
Cc: <daniel@iogearbox.net>, <rostedt@goodmis.org>, <x86@kernel.org>,
<netdev@vger.kernel.org>, <bpf@vger.kernel.org>,
<kernel-team@fb.com>
Subject: [PATCH bpf 3/3] selftests/bpf: test function_graph tracer and bpf trampoline together
Date: Sun, 8 Dec 2019 16:01:14 -0800 [thread overview]
Message-ID: <20191209000114.1876138-4-ast@kernel.org> (raw)
In-Reply-To: <20191209000114.1876138-1-ast@kernel.org>
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>
---
tools/testing/selftests/bpf/test_ftrace.sh | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
create mode 100755 tools/testing/selftests/bpf/test_ftrace.sh
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
--
2.23.0
next prev parent reply other threads:[~2019-12-09 0:01 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-09 0:01 [PATCH bpf 0/3] bpf: Make BPF trampoline friendly to ftrace Alexei Starovoitov
2019-12-09 0:01 ` [PATCH bpf 1/3] ftrace: Fix function_graph tracer interaction with BPF trampoline Alexei Starovoitov
2019-12-10 16:19 ` Alexei Starovoitov
2019-12-10 16:30 ` Steven Rostedt
2019-12-10 23:35 ` Steven Rostedt
2019-12-10 23:49 ` Alexei Starovoitov
2019-12-09 0:01 ` [PATCH bpf 2/3] bpf: Make BPF trampoline use register_ftrace_direct() API Alexei Starovoitov
2019-12-09 0:01 ` Alexei Starovoitov [this message]
2019-12-09 18:42 ` [PATCH bpf 0/3] bpf: Make BPF trampoline friendly to ftrace Martin Lau
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