Add the clang library to the repo (with some of my changes, too).

1 files changed, 83 insertions, 0 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp b/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp
new file mode 100644
index 0000000..0a047d9
--- /dev/null
+++ b/clang/lib/StaticAnalyzer/Core/CheckerContext.cpp
@@ -0,0 +1,83 @@
+//== CheckerContext.cpp - Context info for path-sensitive checkers-----------=//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines CheckerContext that provides contextual info for
+//  path-sensitive checkers.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/Basic/Builtins.h"
+#include "clang/Lex/Lexer.h"
+
+using namespace clang;
+using namespace ento;
+
+const FunctionDecl *CheckerContext::getCalleeDecl(const CallExpr *CE) const {
+  ProgramStateRef State = getState();
+  const Expr *Callee = CE->getCallee();
+  SVal L = State->getSVal(Callee, Pred->getLocationContext());
+  return L.getAsFunctionDecl();
+}
+
+StringRef CheckerContext::getCalleeName(const FunctionDecl *FunDecl) const {
+  if (!FunDecl)
+    return StringRef();
+  IdentifierInfo *funI = FunDecl->getIdentifier();
+  if (!funI)
+    return StringRef();
+  return funI->getName();
+}
+
+
+bool CheckerContext::isCLibraryFunction(const FunctionDecl *FD,
+                                        StringRef Name) {
+  return isCLibraryFunction(FD, Name, getASTContext());
+}
+
+bool CheckerContext::isCLibraryFunction(const FunctionDecl *FD,
+                                        StringRef Name, ASTContext &Context) {
+  // To avoid false positives (Ex: finding user defined functions with
+  // similar names), only perform fuzzy name matching when it's a builtin.
+  // Using a string compare is slow, we might want to switch on BuiltinID here.
+  unsigned BId = FD->getBuiltinID();
+  if (BId != 0) {
+    StringRef BName = Context.BuiltinInfo.GetName(BId);
+    if (BName.find(Name) != StringRef::npos)
+      return true;
+  }
+
+  const IdentifierInfo *II = FD->getIdentifier();
+  // If this is a special C++ name without IdentifierInfo, it can't be a
+  // C library function.
+  if (!II)
+    return false;
+
+  StringRef FName = II->getName();
+  if (FName.equals(Name))
+    return true;
+
+  if (FName.startswith("__inline") && (FName.find(Name) != StringRef::npos))
+    return true;
+
+  if (FName.startswith("__") && FName.endswith("_chk") &&
+      FName.find(Name) != StringRef::npos)
+    return true;
+
+  return false;
+}
+
+StringRef CheckerContext::getMacroNameOrSpelling(SourceLocation &Loc) {
+  if (Loc.isMacroID())
+    return Lexer::getImmediateMacroName(Loc, getSourceManager(),
+                                             getLangOpts());
+  SmallVector<char, 16> buf;
+  return Lexer::getSpelling(Loc, buf, getSourceManager(), getLangOpts());
+}
+