fix cli

.github/workflows/test-aot-cli.yml

@@ -39,6 +39,10 @@ jobs:
       run: |
           cmake -B build -DCMAKE_BUILD_TYPE=Debug -DBPFTIME_ENABLE_UNIT_TESTING=1 -DBUILD_LLVM_AOT_CLI=1 -G Ninja
           cmake --build build --target all -j
+    - name: test emit llvm
+      run: |
+        ./build/cli/bpftime-vm build -emit-llvm .github/assets/sum.bpf.o
+
     - name: Do compilation & run
       run: |
         export PATH=$PATH:~/.bpftime
@@ -53,5 +57,6 @@ jobs:
           echo "Not found!"
           exit 1
         fi
+
         
       

README.md

@@ -17,7 +17,14 @@ This library is optimized for performance, flexibility, and minimal dependencies
 
 For a comprehensive userspace eBPF runtime that includes support for maps, helpers, and seamless execution of Uprobe, syscall trace, XDP, and other eBPF programs—similar to kernel functionality but in userspace—please refer to the [bpftime](https://github.com/eunomia-bpf/bpftime) project.
 
-## build
+- [Userspace eBPF VM with LLVM JIT/AOT Compiler](#userspace-ebpf-vm-with-llvm-jitaot-compiler)
+  - [build project](#build-project)
+  - [Use llvmbpf as a library](#use-llvmbpf-as-a-library)
+  - [Use llvmbpf as a AOT compiler](#use-llvmbpf-as-a-aot-compiler)
+  - [Test with bpf-conformance](#test-with-bpf-conformance)
+  - [License](#license)
+
+## build project
 
 ```sh
 sudo apt install llvm-15-dev libzstd-dev

cli/README.md

@@ -15,6 +15,5 @@ Subcommands:
 
 A CLI compiler for AOT of llvm-jit.
 
-It can build ebpf ELF into native elf, or execute compiled native ELF. **Helpers and relocations are not supported**
+It can build ebpf ELF into native elf, or execute compiled native ELF. **Helpers and relocations are not supported. For helpers and maps, please use bpftime aot cli in the [bpftime/tools](https://github.com/eunomia-bpf/bpftime)**
 
-This program might be installed by running `make release-with-llvm-jit` in the project root.

cli/main.cpp

@@ -92,10 +92,14 @@ static int build_ebpf_program(const std::string &ebpf_elf,
 				i, "helper_" + std::to_string(i), nullptr);
 		}
 		auto result = vm.do_aot_compile(emit_llvm);
-
+		if (!result) {
+			SPDLOG_ERROR("Failed to compile program {}: {}",
+				     name, vm.get_error_message());
+			return 1;
+		}
 		auto out_path = output / (std::string(name) + ".o");
 		std::ofstream ofs(out_path, std::ios::binary);
-		ofs.write((const char *)result.data(), result.size());
+		ofs.write((const char *)result->data(), result->size());
 		if (!emit_llvm)
 			SPDLOG_INFO("Program {} written to {}", name,
 				    out_path.c_str());