tools/sofdsnoop: Add argument "--ebpf" (#5262)

Add argument "--ebpf" for tools/sofdsnoop.

Signed-off-by: yu410621 <[email protected]>

Author: yu410621

tools/sofdsnoop.py

@@ -10,6 +10,7 @@
 # Licensed under the Apache License, Version 2.0 (the "License")
 #
 # 30-Jul-2018   Jiri Olsa   Created this.
+# 31-Mar-2025   yu410621    Add argument "--ebpf".
 
 from __future__ import print_function
 from bcc import ArgString, BPF
@@ -42,6 +43,8 @@
     help="only print process names containing this name")
 parser.add_argument("-d", "--duration",
     help="total duration of trace in seconds")
+parser.add_argument("--ebpf", action="store_true",
+    help=argparse.SUPPRESS)
 args = parser.parse_args()
 debug = 0
 
@@ -266,6 +269,12 @@
 else:
     bpf_text = bpf_text.replace('FILTER', '')
 
+# output eBPF program C code after it is replaced, used by debugging
+if debug or args.ebpf:
+    print(bpf_text)
+    if args.ebpf:
+        exit()
+
 # initialize BPF
 b = BPF(text=bpf_text)