Adapt to removal of `async_tokio` feature

See https://github.com/aya-rs/aya/commit/35332f2288b0bbb8981233ae464715.

Cargo.toml

@@ -11,11 +11,11 @@ default-members = ["{{project-name}}", "{{project-name}}-common"]
 license = "MIT OR Apache-2.0"
 
 [workspace.dependencies]
-aya = { version = "0.13.1", default-features = false }
-aya-build = { version = "0.1.2", default-features = false }
-aya-ebpf = { version = "0.1.1", default-features = false }
-aya-log = { version = "0.2.1", default-features = false }
-aya-log-ebpf = { version = "0.1.1", default-features = false }
+aya = { git = "https://github.com/aya-rs/aya", default-features = false }
+aya-build = { git = "https://github.com/aya-rs/aya", default-features = false }
+aya-ebpf = { git = "https://github.com/aya-rs/aya", default-features = false }
+aya-log = { git = "https://github.com/aya-rs/aya", default-features = false }
+aya-log-ebpf = { git = "https://github.com/aya-rs/aya", default-features = false }
 
 anyhow = { version = "1", default-features = false }
 # `std` feature is currently required to build `clap`.

{{project-name}}-ebpf/src/main.rs

@@ -325,6 +325,6 @@ fn panic(_info: &core::panic::PanicInfo) -> ! {
     loop {}
 }
 
-#[link_section = "license"]
-#[no_mangle]
+#[unsafe(link_section = "license")]
+#[unsafe(no_mangle)]
 static LICENSE: [u8; 13] = *b"Dual MIT/GPL\0";

{{project-name}}/build.rs

@@ -1,5 +1,5 @@
 use anyhow::{anyhow, Context as _};
-use aya_build::cargo_metadata;
+use aya_build::{cargo_metadata, Toolchain};
 
 fn main() -> anyhow::Result<()> {
     let cargo_metadata::Metadata { packages, .. } = cargo_metadata::MetadataCommand::new()
@@ -8,7 +8,7 @@ fn main() -> anyhow::Result<()> {
         .context("MetadataCommand::exec")?;
     let ebpf_package = packages
         .into_iter()
-        .find(|cargo_metadata::Package { name, .. }| name == "{{project-name}}-ebpf")
+        .find(|cargo_metadata::Package { name, .. }| name.as_str() == "aya-test-crate-ebpf")
         .ok_or_else(|| anyhow!("{{project-name}}-ebpf package not found"))?;
-    aya_build::build_ebpf([ebpf_package])
+    aya_build::build_ebpf([ebpf_package], Toolchain::default())
 }

{{project-name}}/src/main.rs

@@ -96,9 +96,22 @@ async fn main() -> anyhow::Result<()> {
         env!("OUT_DIR"),
         "/{{project-name}}"
     )))?;
-    if let Err(e) = aya_log::EbpfLogger::init(&mut ebpf) {
-        // This can happen if you remove all log statements from your eBPF program.
-        warn!("failed to initialize eBPF logger: {e}");
+    match aya_log::EbpfLogger::init(&mut ebpf) {
+        Err(e) => {
+            // This can happen if you remove all log statements from your eBPF program.
+            warn!("failed to initialize eBPF logger: {e}");
+        }
+        Ok(logger) => {
+            let mut logger =
+                tokio::io::unix::AsyncFd::with_interest(logger, tokio::io::Interest::READABLE)?;
+            tokio::task::spawn(async move {
+                loop {
+                    let mut guard = logger.readable_mut().await.unwrap();
+                    guard.get_inner_mut().flush();
+                    guard.clear_ready();
+                }
+            });
+        }
     }
     {%- case program_type -%}
     {%- when "kprobe", "kretprobe" %}
@@ -119,7 +132,7 @@ async fn main() -> anyhow::Result<()> {
     let Opt { pid } = opt;
     let program: &mut UProbe = ebpf.program_mut("{{crate_name}}").unwrap().try_into()?;
     program.load()?;
-    program.attach(Some("{{uprobe_fn_name}}"), 0, "{{uprobe_target}}", pid)?;
+    program.attach("{{uprobe_fn_name}}", "{{uprobe_target}}", pid, None /* cookie */)?;
     {%- when "sock_ops", "cgroup_skb", "cgroup_sysctl", "cgroup_sockopt" %}
     let Opt { cgroup_path } = opt;
     let cgroup =