fix bug and format.

test/integration-ebpf/src/stack_argument.rs

@@ -2,8 +2,9 @@
 #![no_main]
 
 use aya_bpf::{
-    macros::{uprobe, map},
+    macros::{map, uprobe},
-    programs::{perf_event, ProbeContext}, maps::PerfEventArray,
+    maps::PerfEventArray,
+    programs::ProbeContext,
 };
 use aya_log_ebpf::{debug, info};
 
@@ -48,7 +49,7 @@ pub fn test_stack_argument(ctx: ProbeContext) -> i32 {
 
 //read argument, and send event
 fn try_stack_argument(ctx: ProbeContext) -> Result<i32, i64> {
-    let args = Args::new();
+    let mut args = Args::new();
     args.a_0 = ctx.arg(0).ok_or(255)?;
     args.a_1 = ctx.arg(1).ok_or(255)?;
     args.a_2 = ctx.arg(2).ok_or(255)?;
@@ -58,7 +59,6 @@ fn try_stack_argument(ctx: ProbeContext) -> Result<i32, i64> {
     args.a_6 = ctx.stack_arg(0).ok_or(255)?;
     args.a_7 = ctx.stack_arg(1).ok_or(255)?;
 
-
     EVENTS.output(&ctx, &args, 0);
 
     Ok(0)