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| author | Johan Engelen <jbc.engelen@gmail.com> | 2017-09-17 17:38:26 +0000 |
|---|---|---|
| committer | Johan Engelen <jbc.engelen@gmail.com> | 2017-09-17 17:38:26 +0000 |
| commit | 6402565d2dc9b196a827deb9b6b4b40eb5b6f3c6 (patch) | |
| tree | 89b45bc628919bb5fd40892c57aed6daa3f74535 /lib/LTO | |
| parent | a1c2bb91ad63986c7bfb3fa2b051cb21c05cb9b3 (diff) | |
[ThinLTO] Avoid archive member collisions with old API
Summary:
ld64 on OSX uses the old ThinLTOCodegenerator API. When two modules have the same name in an archive (valid archive), a name collision happens for the modules' buffer identifiers.
This PR resolves this, by suffixing the module name with an increasing number such that the identifiers are guaranteed to be unique.
For a similar fix in LLD, see https://reviews.llvm.org/D25495
Reviewers: mehdi_amini, tejohnson
Reviewed By: mehdi_amini
Subscribers: inglorion, eraman, llvm-commits
Differential Revision: https://reviews.llvm.org/D37961
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313488 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/LTO')
| -rw-r--r-- | lib/LTO/ThinLTOCodeGenerator.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/LTO/ThinLTOCodeGenerator.cpp b/lib/LTO/ThinLTOCodeGenerator.cpp index ffd78dad922..d6e5d4d0c21 100644 --- a/lib/LTO/ThinLTOCodeGenerator.cpp +++ b/lib/LTO/ThinLTOCodeGenerator.cpp @@ -535,7 +535,9 @@ static void initTMBuilder(TargetMachineBuilder &TMBuilder, } // end anonymous namespace void ThinLTOCodeGenerator::addModule(StringRef Identifier, StringRef Data) { - ThinLTOBuffer Buffer(Data, Identifier); + std::string Id = + (Twine(Identifier) + "_" + std::to_string(Modules.size())).str(); + ThinLTOBuffer Buffer(Data, std::move(Id)); LLVMContext Context; StringRef TripleStr; ErrorOr<std::string> TripleOrErr = expectedToErrorOrAndEmitErrors( |