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Gold-plugin: Broaden scope of get/release_input_file to scope of Module.
Summary: Move calls to get_input_file and release_input_file out of getModuleForFile(). Otherwise release_input_file may end up unmapping a view of the file while the view is still being used by the Module (on 32-bit hosts). Fix for PR22482. Test Plan: Add test using --no-map-whole-files. Reviewers: rafael, nlewycky Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D7539 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@228842 91177308-0d34-0410-b5e6-96231b3b80d8
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9
test/tools/gold/no-map-whole-file.ll
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9
test/tools/gold/no-map-whole-file.ll
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@ -0,0 +1,9 @@
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; RUN: llvm-as -o %t.bc %s
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; RUN: ld -plugin %llvmshlibdir/LLVMgold.so -plugin-opt=emit-llvm \
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; RUN: --no-map-whole-files -r -o %t2.bc %t.bc
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; RUN: llvm-dis < %t2.bc -o - | FileCheck %s
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; CHECK: main
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define i32 @main() {
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ret i32 0
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}
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@ -560,11 +560,9 @@ static void freeSymName(ld_plugin_symbol &Sym) {
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}
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static std::unique_ptr<Module>
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getModuleForFile(LLVMContext &Context, claimed_file &F, raw_fd_ostream *ApiFile,
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getModuleForFile(LLVMContext &Context, claimed_file &F,
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off_t Filesize, raw_fd_ostream *ApiFile,
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StringSet<> &Internalize, StringSet<> &Maybe) {
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ld_plugin_input_file File;
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if (get_input_file(F.handle, &File) != LDPS_OK)
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message(LDPL_FATAL, "Failed to get file information");
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if (get_symbols(F.handle, F.syms.size(), &F.syms[0]) != LDPS_OK)
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message(LDPL_FATAL, "Failed to get symbol information");
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@ -573,7 +571,7 @@ getModuleForFile(LLVMContext &Context, claimed_file &F, raw_fd_ostream *ApiFile,
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if (get_view(F.handle, &View) != LDPS_OK)
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message(LDPL_FATAL, "Failed to get a view of file");
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MemoryBufferRef BufferRef(StringRef((const char *)View, File.filesize), "");
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MemoryBufferRef BufferRef(StringRef((const char *)View, Filesize), "");
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ErrorOr<std::unique_ptr<object::IRObjectFile>> ObjOrErr =
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object::IRObjectFile::create(BufferRef, Context);
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@ -581,9 +579,6 @@ getModuleForFile(LLVMContext &Context, claimed_file &F, raw_fd_ostream *ApiFile,
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message(LDPL_FATAL, "Could not read bitcode from file : %s",
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EC.message().c_str());
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if (release_input_file(F.handle) != LDPS_OK)
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message(LDPL_FATAL, "Failed to release file information");
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object::IRObjectFile &Obj = **ObjOrErr;
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Module &M = Obj.getModule();
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@ -802,8 +797,12 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
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StringSet<> Internalize;
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StringSet<> Maybe;
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for (claimed_file &F : Modules) {
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ld_plugin_input_file File;
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if (get_input_file(F.handle, &File) != LDPS_OK)
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message(LDPL_FATAL, "Failed to get file information");
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std::unique_ptr<Module> M =
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getModuleForFile(Context, F, ApiFile, Internalize, Maybe);
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getModuleForFile(Context, F, File.filesize, ApiFile,
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Internalize, Maybe);
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if (!options::triple.empty())
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M->setTargetTriple(options::triple.c_str());
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else if (M->getTargetTriple().empty()) {
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@ -812,6 +811,8 @@ static ld_plugin_status allSymbolsReadHook(raw_fd_ostream *ApiFile) {
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if (L.linkInModule(M.get()))
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message(LDPL_FATAL, "Failed to link module");
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if (release_input_file(F.handle) != LDPS_OK)
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message(LDPL_FATAL, "Failed to release file information");
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}
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for (const auto &Name : Internalize) {
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