Adjust Program::test_run to work on shared receiver

The Program::test_run method also does not seem to really require
exclusive access to the bpf_program object. As such, this change
switches it over to work on a shared receiver (&self).

Signed-off-by: Daniel Müller <[email protected]>

Author: d-e-s-o

libbpf-rs/CHANGELOG.md

@@ -4,7 +4,7 @@ Unreleased
   - Deprecated `Program::get_id_by_fd`
 - Renamed `Program::get_fd_by_id` to `fd_from_id`
   - Deprecated `Program::get_fd_by_id`
-- Adjusted various `Program::attach_*` methods to work on shared
+- Adjusted `Program::{attach_*, test_run}` methods to work on shared
   receivers
 - Adjusted `PerfBufferBuilder` to work with `MapCore` objects
 

libbpf-rs/src/program.rs

@@ -1101,7 +1101,7 @@ impl<'obj> ProgramMut<'obj> {
     /// This function uses the
     /// [BPF_PROG_RUN](https://www.kernel.org/doc/html/latest/bpf/bpf_prog_run.html)
     /// facility.
-    pub fn test_run<'dat>(&mut self, input: Input<'dat>) -> Result<Output<'dat>> {
+    pub fn test_run<'dat>(&self, input: Input<'dat>) -> Result<Output<'dat>> {
         unsafe fn slice_from_array<'t, T>(items: *mut T, num_items: usize) -> Option<&'t mut [T]> {
             if items.is_null() {
                 None

libbpf-rs/tests/test.rs

@@ -2027,7 +2027,7 @@ fn test_run_prog_success() {
     bump_rlimit_mlock();
 
     let mut obj = get_test_object("run_prog.bpf.o");
-    let mut prog = get_prog_mut(&mut obj, "test_1");
+    let prog = get_prog_mut(&mut obj, "test_1");
 
     #[repr(C)]
     struct bpf_dummy_ops_state {
@@ -2054,7 +2054,7 @@ fn test_run_prog_fail() {
     bump_rlimit_mlock();
 
     let mut obj = get_test_object("run_prog.bpf.o");
-    let mut prog = get_prog_mut(&mut obj, "test_2");
+    let prog = get_prog_mut(&mut obj, "test_2");
 
     let input = ProgramInput::default();
     let _err = prog.test_run(input).unwrap_err();