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perf clang: Update test case to use real BPF script

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Allow C++ code to use util.h and tests/llvm.h. Let 'perf test' compile a
real BPF script.

Signed-off-by: Wang Nan <wangnan0@huawei.com>
Cc: Alexei Starovoitov <ast@fb.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Joe Stringer <joe@ovn.org>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/20161126070354.141764-14-wangnan0@huawei.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan
2016-11-26 07:03:37 +00:00
committed by Arnaldo Carvalho de Melo
parent a9495fe9dc
commit e67d52d411
4 changed files with 62 additions and 15 deletions
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17
tools/perf/util/c++/clang-test.cpp
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@@ -3,6 +3,10 @@
#include "llvm/IR/Function.h"
#include "llvm/IR/LLVMContext.h"
#include <util-cxx.h>
#include <tests/llvm.h>
#include <string>
class perf_clang_scope {
public:
explicit perf_clang_scope() {perf_clang__init();}
@@ -14,17 +18,24 @@ extern "C" {
int test__clang_to_IR(void)
{
perf_clang_scope _scope;
unsigned int kernel_version;
if (fetch_kernel_version(&kernel_version, NULL, 0))
return -1;
std::string cflag_kver("-DLINUX_VERSION_CODE=" +
std::to_string(kernel_version));
std::unique_ptr<llvm::Module> M =
perf::getModuleFromSource({"-DRESULT=1"},
perf::getModuleFromSource({cflag_kver.c_str()},
"perf-test.c",
"int myfunc(void) {return RESULT;}");
test_llvm__bpf_base_prog);
if (!M)
return -1;
for (llvm::Function& F : *M)
if (F.getName() == "myfunc")
if (F.getName() == "bpf_func__SyS_epoll_wait")
return 0;
return -1;
}