fix test

.github/workflows/test-vm.yml

@@ -5,28 +5,8 @@ on:
     branches: [ master ]
   pull_request:
     branches: [ master ]
-concurrency:
-  group: ${{ github.workflow }}-${{ github.ref }}-${{ github.event_name }}
-  cancel-in-progress: true
 jobs:
   build:
-    runs-on: ubuntu-latest
-    strategy:
-      matrix:
-        container:
-          - ubuntu-2204
-          - fedora-39
-    container: 
-      image: "manjusakalza/bpftime-base-image:${{matrix.container}}"
-      options: --privileged
-    steps:
-
-    - name: cache dependencies
-      uses: actions/cache@v2
-      id: cache
-      with:
-        path: ${{ github.workspace }}/${{ env.INSTALL_LOCATION }}
-        key: ${{ runner.os }}-dependencies
     - uses: actions/checkout@v2
       with:
         submodules: 'recursive'
@@ -35,8 +15,12 @@ jobs:
       with:
         python-version: '3.8'
     - name: build
-      run: make build-vm
-    - name: run tests x86
+      run: 
+           |
+          sudo apt install llvm-15-dev
+          cmake -B build -DCMAKE_BUILD_TYPE=Debug
+          cmake --build build --target all -j
+    - name: run testsuit x86
       shell: bash
       run: |
         python3.8 -m venv vm/test

.github/workflows/test-llvm-jit.yml → .github/workflows/unit-test.yml

@@ -23,9 +23,15 @@ jobs:
     - uses: actions/checkout@v2
       with:
         submodules: 'recursive'
-    - name: Build and install everything
+    - name: build
+      run: 
+           |
+          sudo apt install llvm-15-dev
+          cmake -B build -DCMAKE_BUILD_TYPE=Debug -DBPFTIME_ENABLE_UNIT_TESTING=1
+          cmake --build build --target all -j
+    - name: Run example
       run: |
-        make build-llvm -j
+        ./build/vm-llvm-example
     - name: Run tests
       run: |
         ./build/vm/llvm-jit/unit-test/llvm_jit_tests

CMakeLists.txt

@@ -79,6 +79,7 @@ if(${BPFTIME_LLVM_JIT})
     add_subdirectory(cli)
 else()
     if(${BPFTIME_ENABLE_UNIT_TESTING})
+      message(INFO " Adding Catch2 seperately..")
        FetchContent_Declare(
         catch
         GIT_REPOSITORY https://github.com/catchorg/Catch2.git

README.md

@@ -12,10 +12,35 @@ cmake -B build -DCMAKE_BUILD_TYPE=Release
 cmake --build build --target all -j
 ```
 
-## run
+## Use llvmbpf as a compiler
 
-```sh
-build/vm-llvm-example
+
+
+## Use llvmbpf as a library
+
+See [example](example/main.cpp) of how to use the library as a vm:
+
+```cpp
+void run_ebpf_prog(const void *code, size_t code_len)
+{
+    uint64_t res = 0;
+    bpftime_llvm_jit_vm vm;
+
+    res = vm.load_code(code, code_len);
+    if (res) {
+        return;
+    }
+    vm.register_external_function(2, "print", (void *)ffi_print_func);
+    auto func = vm.compile();
+    if (!func) {
+        return;
+    }
+    int err = vm.exec(&bpf_mem, sizeof(bpf_mem), res);
+    if (err != 0) {
+        return;
+    }
+    printf("res = %" PRIu64 "\n", res);
+}
 ```
 
 ## Test with bpf-conformance