CI: add a standalone reuseport coverage test

Author: zh-jq

.github/workflows/codecov.yml

@@ -64,6 +64,40 @@ jobs:
           name: lib-unit-test
           token: ${{ secrets.CODECOV_TOKEN }}
           verbose: false
+  lib-reuseport:
+    name: reuseport test
+    runs-on: ubuntu-26.04
+    steps:
+      - name: Checkout sources
+        uses: actions/checkout@v7
+        with:
+          submodules: true
+      - name: Install rust toolchain
+        uses: actions-rust-lang/setup-rust-toolchain@v1
+        with:
+          toolchain: stable
+          components: llvm-tools
+      - name: Install build dependencies
+        run: |
+          sudo apt-get update
+          sudo apt-get install libbpf-dev linux-bpf-dev
+      - name: Install binutils
+        run: |
+          cargo install cargo-binutils@0.3.6
+      - name: run unit test
+        run: |
+          cargo clean
+          ./scripts/coverage/lib_reuseport.sh
+      - name: Upload coverage data
+        uses: codecov/codecov-action@v7
+        with:
+          fail_ci_if_error: true
+          disable_search: true
+          files: output.lcov
+          flags: reuseport
+          name: lib-reuseport
+          token: ${{ secrets.CODECOV_TOKEN }}
+          verbose: false
   vey-mkcert-test:
     name: vey-mkcert test
     runs-on: ubuntu-26.04

scripts/coverage/lib_reuseport.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+set -e
+
+SCRIPTS_DIR=$(dirname "$0")
+PROJECT_DIR=$(realpath "${SCRIPTS_DIR}/../..")
+
+
+TEST_NAME="reuseport-test"
+. "${SCRIPTS_DIR}/enter.sh"
+
+# build
+cargo build -p vey-reuseport
+
+all_binaries=$(find target/debug/ -maxdepth 1 -type f -perm /111 | awk '{print "-object "$0}')
+
+# run the tests
+sudo "${PROJECT_DIR}"/target/debug/udp_reuseport_test
+
+all_objects=$(find target/debug/deps/ -type f -perm /111 -not -name "*.so" | awk '{print "-object "$0}')
+
+
+# get all profraw files generated in each test
+profraw_files=$(find . -type f -regex ".*/${TEST_NAME}.*\.profraw")
+
+# get indexed profile data file
+cargo profdata -- merge -o "${PROF_DATA_FILE}" ${profraw_files}
+
+# report to console
+
+IGNORE_FLAGS="--ignore-filename-regex=.cargo \
+    --ignore-filename-regex=rustc \
+    --ignore-filename-regex=target/debug/build"
+
+cargo cov -- report --use-color --instr-profile="${PROF_DATA_FILE}" ${IGNORE_FLAGS} ${all_binaries} ${all_objects}
+cargo cov -- export --format=lcov --instr-profile="${PROF_DATA_FILE}" ${IGNORE_FLAGS} ${all_binaries} ${all_objects} > output.lcov