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https://github.com/torvalds/linux
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5e08a76525
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>
63 lines
1.2 KiB
C++
63 lines
1.2 KiB
C++
#include "clang.h"
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#include "clang-c.h"
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#include "llvm/IR/Function.h"
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#include "llvm/IR/LLVMContext.h"
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#include <util-cxx.h>
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#include <tests/llvm.h>
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#include <string>
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class perf_clang_scope {
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public:
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explicit perf_clang_scope() {perf_clang__init();}
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~perf_clang_scope() {perf_clang__cleanup();}
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};
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static std::unique_ptr<llvm::Module>
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__test__clang_to_IR(void)
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{
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unsigned int kernel_version;
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if (fetch_kernel_version(&kernel_version, NULL, 0))
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return std::unique_ptr<llvm::Module>(nullptr);
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std::string cflag_kver("-DLINUX_VERSION_CODE=" +
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std::to_string(kernel_version));
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std::unique_ptr<llvm::Module> M =
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perf::getModuleFromSource({cflag_kver.c_str()},
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"perf-test.c",
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test_llvm__bpf_base_prog);
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return M;
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}
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extern "C" {
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int test__clang_to_IR(void)
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{
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perf_clang_scope _scope;
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auto M = __test__clang_to_IR();
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if (!M)
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return -1;
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for (llvm::Function& F : *M)
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if (F.getName() == "bpf_func__SyS_epoll_wait")
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return 0;
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return -1;
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}
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int test__clang_to_obj(void)
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{
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perf_clang_scope _scope;
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auto M = __test__clang_to_IR();
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if (!M)
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return -1;
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auto Buffer = perf::getBPFObjectFromModule(&*M);
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if (!Buffer)
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return -1;
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return 0;
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}
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}
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