example: add usdt.bt

Add example bpftrace file for monitoring tracepoints.

Signed-off-by: Joanne Koong <joannelkoong@gmail.com>

1 files changed, 19 insertions, 0 deletions

diff --git a/example/usdt.bt b/example/usdt.bt
new file mode 100644
index 0000000..41cfcdc
--- /dev/null
+++ b/example/usdt.bt
@@ -0,0 +1,19 @@
+#!/usr/bin/env bpftrace
+
+// To run, do `sudo bpftrace usdt.bt`
+
+usdt:../build/lib/libfuse3.so:libfuse:request_receive
+{
+    printf("libfuse:request_receive hit, err=%d\n", arg0);
+}
+
+usdt:../build/lib/libfuse3.so:libfuse:request_process
+{
+    printf("libfuse:request_process hit, opcode=%u, unique=%u\n", arg0, arg1);
+}
+
+usdt:../build/lib/libfuse3.so:libfuse:request_reply
+{
+    printf("libfuse:request_reply hit, unique=%lu, len=%u, err=%u, reply_err=%d\n",
+	    arg0, arg1, arg2, arg3);
+}