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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fcbd8fa446
As stated in tests/llvm-src-base.c, the name of the bpf function should
be "bpf_func__SyS_epoll_pwait" but this clang test fails as it tries to
lookup "bpf_func__SyS_epoll_wait".
Before applying patch:
55: builtin clang support :
55.1: builtin clang compile C source to IR : FAILED!
55.2: builtin clang compile C source to ELF object : Skip
After applying patch:
55: builtin clang support :
55.1: builtin clang compile C source to IR : Ok
55.2: builtin clang compile C source to ELF object : Ok
Signed-off-by: Sandipan Das <sandipan@linux.vnet.ibm.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Fixes: e67d52d411 ("perf clang: Update test case to use real BPF script")
Link: http://lkml.kernel.org/r/20180404180419.19056-3-sandipan@linux.vnet.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
64 lines
1.2 KiB
C++
64 lines
1.2 KiB
C++
// SPDX-License-Identifier: GPL-2.0
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#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_pwait")
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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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