leandrof/linux
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

perf clang: Support compile IR to BPF object and add testcase

Browse Source 
getBPFObjectFromModule() is introduced to compile LLVM IR(Module)
to BPF object. Add new testcase for it.

Test result:
  $ ./buildperf/perf test -v clang
  51: builtin clang support                               :
  51.1: builtin clang compile C source to IR              :
  --- start ---
  test child forked, pid 21822
  test child finished with 0
  ---- end ----
  builtin clang support subtest 0: Ok
  51.2: builtin clang compile C source to ELF object      :
  --- start ---
  test child forked, pid 21823
  test child finished with 0
  ---- end ----
  builtin clang support subtest 1: Ok

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/20161126070354.141764-15-wangnan0@huawei.com
[ Remove redundant "Test" from entry descriptions ]
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
This commit is contained in:
Wang Nan
2016-11-26 07:03:38 +00:00
committed by Arnaldo Carvalho de Melo
parent e67d52d411
commit 5e08a76525
5 changed files with 79 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

31
tools/perf/util/c++/clang-test.cpp
View File

@@ -13,15 +13,13 @@ public:
~perf_clang_scope() {perf_clang__cleanup();}
};
extern "C" {
int test__clang_to_IR(void)
static std::unique_ptr<llvm::Module>
__test__clang_to_IR(void)
{
perf_clang_scope _scope;
unsigned int kernel_version;
if (fetch_kernel_version(&kernel_version, NULL, 0))
return -1;
return std::unique_ptr<llvm::Module>(nullptr);
std::string cflag_kver("-DLINUX_VERSION_CODE=" +
std::to_string(kernel_version));
@@ -30,14 +28,35 @@ int test__clang_to_IR(void)
perf::getModuleFromSource({cflag_kver.c_str()},
"perf-test.c",
test_llvm__bpf_base_prog);
return M;
}
extern "C" {
int test__clang_to_IR(void)
{
perf_clang_scope _scope;
auto M = __test__clang_to_IR();
if (!M)
return -1;
for (llvm::Function& F : *M)
if (F.getName() == "bpf_func__SyS_epoll_wait")
return 0;
return -1;
}
int test__clang_to_obj(void)
{
perf_clang_scope _scope;
auto M = __test__clang_to_IR();
if (!M)
return -1;
auto Buffer = perf::getBPFObjectFromModule(&*M);
if (!Buffer)
return -1;
return 0;
}
}