feat(examples): add rftrace-example

Signed-off-by: Martin Kröning <[email protected]>

.github/workflows/ci.yml

@@ -17,8 +17,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: true
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rust-src
       - uses: mkroening/rust-toolchain-toml@main
-      - run: rustup component add clippy
+      - run: rustup component add clippy llvm-tools
       - name: Clippy
         run: |
           cargo clippy --all-targets
@@ -43,7 +46,11 @@ jobs:
       - uses: actions/checkout@v4
         with:
           submodules: true
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rust-src
       - uses: mkroening/rust-toolchain-toml@main
+      - run: rustup component add llvm-tools
       - name: Check docs
         run: cargo doc --no-deps --document-private-items
 

Cargo.toml

@@ -11,6 +11,7 @@ members = [
     "examples/miotcp",
     "examples/mioudp",
     "examples/polling",
+    "examples/rftrace-example",
     "examples/testtcp",
     "examples/testudp",
     "examples/tls",

examples/rftrace-example/Cargo.toml

@@ -0,0 +1,16 @@
+[package]
+name = "rftrace-example"
+version = "0.1.0"
+authors = ["Martin Kröning <[email protected]>"]
+edition = "2021"
+publish = false
+
+[dependencies]
+rftrace = "0.2"
+rftrace-frontend = "0.2"
+
+[target.'cfg(target_os = "hermit")'.dependencies]
+hermit = { path = "../../hermit" }
+
+[features]
+instrument-kernel = ["hermit/instrument"]

examples/rftrace-example/src/main.rs

@@ -0,0 +1,26 @@
+#[cfg(target_os = "hermit")]
+use hermit as _;
+
+extern crate rftrace as _;
+use rftrace_frontend as rftrace;
+
+fn main() {
+	let events = rftrace::init(2000, false);
+	rftrace::enable();
+	f1();
+	// Uhyve mounts at `/host`, virtiofsd mounts to `/root`
+	rftrace::dump_full_uftrace(events, "/root/tracedir", "rftrace-example").unwrap();
+}
+
+#[inline(never)]
+fn f1() {
+	f2();
+}
+
+#[inline(never)]
+fn f2() {
+	f3();
+}
+
+#[inline(never)]
+fn f3() {}