Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2#include "clang.h"
3#include "clang-c.h"
4#include "llvm/IR/Function.h"
5#include "llvm/IR/LLVMContext.h"
6
7#include <util-cxx.h>
8#include <tests/llvm.h>
9#include <string>
10
11class perf_clang_scope {
12public:
13 explicit perf_clang_scope() {perf_clang__init();}
14 ~perf_clang_scope() {perf_clang__cleanup();}
15};
16
17static std::unique_ptr<llvm::Module>
18__test__clang_to_IR(void)
19{
20 unsigned int kernel_version;
21
22 if (fetch_kernel_version(&kernel_version, NULL, 0))
23 return std::unique_ptr<llvm::Module>(nullptr);
24
25 std::string cflag_kver("-DLINUX_VERSION_CODE=" +
26 std::to_string(kernel_version));
27
28 std::unique_ptr<llvm::Module> M =
29 perf::getModuleFromSource({cflag_kver.c_str()},
30 "perf-test.c",
31 test_llvm__bpf_base_prog);
32 return M;
33}
34
35extern "C" {
36int test__clang_to_IR(void)
37{
38 perf_clang_scope _scope;
39
40 auto M = __test__clang_to_IR();
41 if (!M)
42 return -1;
43 for (llvm::Function& F : *M)
44 if (F.getName() == "bpf_func__SyS_epoll_pwait")
45 return 0;
46 return -1;
47}
48
49int test__clang_to_obj(void)
50{
51 perf_clang_scope _scope;
52
53 auto M = __test__clang_to_IR();
54 if (!M)
55 return -1;
56
57 auto Buffer = perf::getBPFObjectFromModule(&*M);
58 if (!Buffer)
59 return -1;
60 return 0;
61}
62
63}