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1 //==-- handle_cxx.cpp - Helper function for Clang fuzzers ------------------==//
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2 //
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3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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4 // See https://llvm.org/LICENSE.txt for license information.
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5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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6 //
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7 //===----------------------------------------------------------------------===//
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8 //
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9 // Implements HandleCXX for use by the Clang fuzzers.
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10 //
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11 //===----------------------------------------------------------------------===//
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12
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13 #include "handle_cxx.h"
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14
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15 #include "clang/CodeGen/CodeGenAction.h"
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16 #include "clang/Frontend/CompilerInstance.h"
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17 #include "clang/Lex/PreprocessorOptions.h"
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18 #include "clang/Tooling/Tooling.h"
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19 #include "llvm/Option/Option.h"
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20
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21 using namespace clang;
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22
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23 void clang_fuzzer::HandleCXX(const std::string &S,
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24 const char *FileName,
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25 const std::vector<const char *> &ExtraArgs) {
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26 llvm::opt::ArgStringList CC1Args;
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27 CC1Args.push_back("-cc1");
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28 for (auto &A : ExtraArgs)
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29 CC1Args.push_back(A);
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30 CC1Args.push_back(FileName);
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31
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32 llvm::IntrusiveRefCntPtr<FileManager> Files(
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33 new FileManager(FileSystemOptions()));
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34 IgnoringDiagConsumer Diags;
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35 IntrusiveRefCntPtr<DiagnosticOptions> DiagOpts = new DiagnosticOptions();
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36 DiagnosticsEngine Diagnostics(
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37 IntrusiveRefCntPtr<clang::DiagnosticIDs>(new DiagnosticIDs()), &*DiagOpts,
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38 &Diags, false);
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39 std::unique_ptr<clang::CompilerInvocation> Invocation(
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40 tooling::newInvocation(&Diagnostics, CC1Args, /*BinaryName=*/nullptr));
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41 std::unique_ptr<llvm::MemoryBuffer> Input =
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42 llvm::MemoryBuffer::getMemBuffer(S);
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43 Invocation->getPreprocessorOpts().addRemappedFile(FileName,
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44 Input.release());
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45 std::unique_ptr<tooling::ToolAction> action(
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46 tooling::newFrontendActionFactory<clang::EmitObjAction>());
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47 std::shared_ptr<PCHContainerOperations> PCHContainerOps =
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48 std::make_shared<PCHContainerOperations>();
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49 action->runInvocation(std::move(Invocation), Files.get(), PCHContainerOps,
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50 &Diags);
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51 }
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52
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