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authorSandipan Das <sandipan@linux.vnet.ibm.com>2018-04-04 23:34:18 +0530
committerArnaldo Carvalho de Melo <acme@redhat.com>2018-04-09 11:13:08 -0300
commit7854e499f33fd9c7e63288692ffb754d9b1d02fd (patch)
tree6750f7f75a43862c60fc3e9f8c305127084ccf59 /tools
parentc2fb54a183cfe77c6fdc9d71e2d5299c1c302a6e (diff)
downloadlinux-7854e499f33fd9c7e63288692ffb754d9b1d02fd.tar.bz2
perf clang: Add support for recent clang versions
The clang API calls used by perf have changed in recent releases and builds succeed with libclang-3.9 only. This introduces compatibility with libclang-4.0 and above. Without this patch, we will see the following compilation errors with libclang-4.0+: util/c++/clang.cpp: In function ‘clang::CompilerInvocation* perf::createCompilerInvocation(llvm::opt::ArgStringList, llvm::StringRef&, clang::DiagnosticsEngine&)’: util/c++/clang.cpp:62:33: error: ‘IK_C’ was not declared in this scope Opts.Inputs.emplace_back(Path, IK_C); ^~~~ util/c++/clang.cpp: In function ‘std::unique_ptr<llvm::Module> perf::getModuleFromSource(llvm::opt::ArgStringList, llvm::StringRef, llvm::IntrusiveRefCntPtr<clang::vfs::FileSystem>)’: util/c++/clang.cpp:75:26: error: no matching function for call to ‘clang::CompilerInstance::setInvocation(clang::CompilerInvocation*)’ Clang.setInvocation(&*CI); ^ In file included from util/c++/clang.cpp:14:0: /usr/include/clang/Frontend/CompilerInstance.h:231:8: note: candidate: void clang::CompilerInstance::setInvocation(std::shared_ptr<clang::CompilerInvocation>) void setInvocation(std::shared_ptr<CompilerInvocation> Value); ^~~~~~~~~~~~~ Committer testing: Tested on Fedora 27 after installing the clang-devel and llvm-devel packages, versions: # rpm -qa | egrep llvm\|clang llvm-5.0.1-6.fc27.x86_64 clang-libs-5.0.1-5.fc27.x86_64 clang-5.0.1-5.fc27.x86_64 clang-tools-extra-5.0.1-5.fc27.x86_64 llvm-libs-5.0.1-6.fc27.x86_64 llvm-devel-5.0.1-6.fc27.x86_64 clang-devel-5.0.1-5.fc27.x86_64 # Make sure you don't have some older version lying around in /usr/local, etc, then: $ make LIBCLANGLLVM=1 -C tools/perf install-bin And in the end perf will be linked agains these libraries: # ldd ~/bin/perf | egrep -i llvm\|clang libclangAST.so.5 => /lib64/libclangAST.so.5 (0x00007f8bb2eb4000) libclangBasic.so.5 => /lib64/libclangBasic.so.5 (0x00007f8bb29e3000) libclangCodeGen.so.5 => /lib64/libclangCodeGen.so.5 (0x00007f8bb23f7000) libclangDriver.so.5 => /lib64/libclangDriver.so.5 (0x00007f8bb2060000) libclangFrontend.so.5 => /lib64/libclangFrontend.so.5 (0x00007f8bb1d06000) libclangLex.so.5 => /lib64/libclangLex.so.5 (0x00007f8bb1a3e000) libclangTooling.so.5 => /lib64/libclangTooling.so.5 (0x00007f8bb17d4000) libclangEdit.so.5 => /lib64/libclangEdit.so.5 (0x00007f8bb15c5000) libclangSema.so.5 => /lib64/libclangSema.so.5 (0x00007f8bb0cc9000) libclangAnalysis.so.5 => /lib64/libclangAnalysis.so.5 (0x00007f8bb0a23000) libclangParse.so.5 => /lib64/libclangParse.so.5 (0x00007f8bb0725000) libclangSerialization.so.5 => /lib64/libclangSerialization.so.5 (0x00007f8bb039a000) libLLVM-5.0.so => /lib64/libLLVM-5.0.so (0x00007f8bace98000) libclangASTMatchers.so.5 => /lib64/../lib64/libclangASTMatchers.so.5 (0x00007f8bab735000) libclangFormat.so.5 => /lib64/../lib64/libclangFormat.so.5 (0x00007f8bab4b2000) libclangRewrite.so.5 => /lib64/../lib64/libclangRewrite.so.5 (0x00007f8bab2a1000) libclangToolingCore.so.5 => /lib64/../lib64/libclangToolingCore.so.5 (0x00007f8bab08e000) # 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: 00b86691c77c ("perf clang: Add builtin clang support ant test case") Link: http://lkml.kernel.org/r/20180404180419.19056-2-sandipan@linux.vnet.ibm.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/c++/clang.cpp11
1 files changed, 10 insertions, 1 deletions
diff --git a/tools/perf/util/c++/clang.cpp b/tools/perf/util/c++/clang.cpp
index 1bfc946e37dc..bf31ceab33bd 100644
--- a/tools/perf/util/c++/clang.cpp
+++ b/tools/perf/util/c++/clang.cpp
@@ -9,6 +9,7 @@
* Copyright (C) 2016 Huawei Inc.
*/
+#include "clang/Basic/Version.h"
#include "clang/CodeGen/CodeGenAction.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Frontend/CompilerInstance.h"
@@ -58,7 +59,8 @@ createCompilerInvocation(llvm::opt::ArgStringList CFlags, StringRef& Path,
FrontendOptions& Opts = CI->getFrontendOpts();
Opts.Inputs.clear();
- Opts.Inputs.emplace_back(Path, IK_C);
+ Opts.Inputs.emplace_back(Path,
+ FrontendOptions::getInputKindForExtension("c"));
return CI;
}
@@ -71,10 +73,17 @@ getModuleFromSource(llvm::opt::ArgStringList CFlags,
Clang.setVirtualFileSystem(&*VFS);
+#if CLANG_VERSION_MAJOR < 4
IntrusiveRefCntPtr<CompilerInvocation> CI =
createCompilerInvocation(std::move(CFlags), Path,
Clang.getDiagnostics());
Clang.setInvocation(&*CI);
+#else
+ std::shared_ptr<CompilerInvocation> CI(
+ createCompilerInvocation(std::move(CFlags), Path,
+ Clang.getDiagnostics()));
+ Clang.setInvocation(CI);
+#endif
std::unique_ptr<CodeGenAction> Act(new EmitLLVMOnlyAction(&*LLVMCtx));
if (!Clang.ExecuteAction(*Act))