Fix extracting pid form bpf_get_current_pid_tgid()

Based on Issue lizrice#35, pid must be extracted from the return value by using an and operation with 0xFFFFFFFF. Signed-off-by: Ali Javidi Ghasr <[email protected]>
AliJavidiCS · Dec 16, 2023 · d03712d · d03712d
1 parent 527713d
commit d03712d
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/chapter4/hello-ring-buffer-config.py b/chapter4/hello-ring-buffer-config.py
@@ -24,7 +24,7 @@
    char message[12] = "Hello World";
    struct user_msg_t *p;
 
-   data.pid = bpf_get_current_pid_tgid() >> 32;
+   data.pid = bpf_get_current_pid_tgid() & 0xFFFFFFFF;
    data.uid = bpf_get_current_uid_gid() & 0xFFFFFFFF;
 
    bpf_get_current_comm(&data.command, sizeof(data.command));