1 files changed, 117 insertions, 0 deletions
diff --git a/lib/StaticAnalyzer/Frontend/ModelInjector.cpp b/lib/StaticAnalyzer/Frontend/ModelInjector.cpp
new file mode 100644
index 0000000..63bb1e2
--- /dev/null
+++ b/lib/StaticAnalyzer/Frontend/ModelInjector.cpp
@@ -0,0 +1,117 @@
+//===-- ModelInjector.cpp ---------------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "ModelInjector.h"
+#include "clang/AST/Decl.h"
+#include "clang/Basic/IdentifierTable.h"
+#include "clang/Frontend/ASTUnit.h"
+#include "clang/Frontend/CompilerInstance.h"
+#include "clang/Frontend/FrontendAction.h"
+#include "clang/Lex/Preprocessor.h"
+#include "clang/Serialization/ASTReader.h"
+#include "clang/StaticAnalyzer/Frontend/FrontendActions.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/Support/CrashRecoveryContext.h"
+#include "llvm/Support/FileSystem.h"
+#include <string>
+#include <utility>
+
+using namespace clang;
+using namespace ento;
+
+ModelInjector::ModelInjector(CompilerInstance &CI) : CI(CI) {}
+
+Stmt *ModelInjector::getBody(const FunctionDecl *D) {
+  onBodySynthesis(D);
+  return Bodies[D->getName()];
+}
+
+Stmt *ModelInjector::getBody(const ObjCMethodDecl *D) {
+  onBodySynthesis(D);
+  return Bodies[D->getName()];
+}
+
+void ModelInjector::onBodySynthesis(const NamedDecl *D) {
+
+  // FIXME: what about overloads? Declarations can be used as keys but what
+  // about file name index? Mangled names may not be suitable for that either.
+  if (Bodies.count(D->getName()) != 0)
+    return;
+
+  SourceManager &SM = CI.getSourceManager();
+  FileID mainFileID = SM.getMainFileID();
+
+  AnalyzerOptionsRef analyzerOpts = CI.getAnalyzerOpts();
+  llvm::StringRef modelPath = analyzerOpts->Config["model-path"];
+
+  llvm::SmallString<128> fileName;
+
+  if (!modelPath.empty())
+    fileName =
+        llvm::StringRef(modelPath.str() + "/" + D->getName().str() + ".model");
+  else
+    fileName = llvm::StringRef(D->getName().str() + ".model");
+
+  if (!llvm::sys::fs::exists(fileName.str())) {
+    Bodies[D->getName()] = nullptr;
+    return;
+  }
+
+  IntrusiveRefCntPtr<CompilerInvocation> Invocation(
+      new CompilerInvocation(CI.getInvocation()));
+
+  FrontendOptions &FrontendOpts = Invocation->getFrontendOpts();
+  InputKind IK = IK_CXX; // FIXME
+  FrontendOpts.Inputs.clear();
+  FrontendOpts.Inputs.push_back(FrontendInputFile(fileName, IK));
+  FrontendOpts.DisableFree = true;
+
+  Invocation->getDiagnosticOpts().VerifyDiagnostics = 0;
+
+  // Modules are parsed by a separate CompilerInstance, so this code mimics that
+  // behavior for models
+  CompilerInstance Instance;
+  Instance.setInvocation(&*Invocation);
+  Instance.createDiagnostics(
+      new ForwardingDiagnosticConsumer(CI.getDiagnosticClient()),
+      /*ShouldOwnClient=*/true);
+
+  Instance.getDiagnostics().setSourceManager(&SM);
+
+  Instance.setVirtualFileSystem(&CI.getVirtualFileSystem());
+
+  // The instance wants to take ownership, however DisableFree frontend option
+  // is set to true to avoid double free issues
+  Instance.setFileManager(&CI.getFileManager());
+  Instance.setSourceManager(&SM);
+  Instance.setPreprocessor(&CI.getPreprocessor());
+  Instance.setASTContext(&CI.getASTContext());
+
+  Instance.getPreprocessor().InitializeForModelFile();
+
+  ParseModelFileAction parseModelFile(Bodies);
+
+  const unsigned ThreadStackSize = 8 << 20;
+  llvm::CrashRecoveryContext CRC;
+
+  CRC.RunSafelyOnThread([&]() { Instance.ExecuteAction(parseModelFile); },
+                        ThreadStackSize);
+
+  Instance.getPreprocessor().FinalizeForModelFile();
+
+  Instance.resetAndLeakSourceManager();
+  Instance.resetAndLeakFileManager();
+  Instance.resetAndLeakPreprocessor();
+
+  // The preprocessor enters to the main file id when parsing is started, so
+  // the main file id is changed to the model file during parsing and it needs
+  // to be reseted to the former main file id after parsing of the model file
+  // is done.
+  SM.setMainFileID(mainFileID);
+}