Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include "clang.h"
2#include "clang-c.h"
3#include "llvm/IR/Function.h"
4#include "llvm/IR/LLVMContext.h"
5
6#include <util-cxx.h>
7#include <tests/llvm.h>
8#include <string>
9
10class perf_clang_scope {
11public:
12 explicit perf_clang_scope() {perf_clang__init();}
13 ~perf_clang_scope() {perf_clang__cleanup();}
14};
15
16static std::unique_ptr<llvm::Module>
17__test__clang_to_IR(void)
18{
19 unsigned int kernel_version;
20
21 if (fetch_kernel_version(&kernel_version, NULL, 0))
22 return std::unique_ptr<llvm::Module>(nullptr);
23
24 std::string cflag_kver("-DLINUX_VERSION_CODE=" +
25 std::to_string(kernel_version));
26
27 std::unique_ptr<llvm::Module> M =
28 perf::getModuleFromSource({cflag_kver.c_str()},
29 "perf-test.c",
30 test_llvm__bpf_base_prog);
31 return M;
32}
33
34extern "C" {
35int test__clang_to_IR(void)
36{
37 perf_clang_scope _scope;
38
39 auto M = __test__clang_to_IR();
40 if (!M)
41 return -1;
42 for (llvm::Function& F : *M)
43 if (F.getName() == "bpf_func__SyS_epoll_wait")
44 return 0;
45 return -1;
46}
47
48int test__clang_to_obj(void)
49{
50 perf_clang_scope _scope;
51
52 auto M = __test__clang_to_IR();
53 if (!M)
54 return -1;
55
56 auto Buffer = perf::getBPFObjectFromModule(&*M);
57 if (!Buffer)
58 return -1;
59 return 0;
60}
61
62}