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

3 files changed, 87 insertions, 0 deletions

diff --git a/clang/examples/analyzer-plugin/CMakeLists.txt b/clang/examples/analyzer-plugin/CMakeLists.txt
new file mode 100644
index 0000000..2b9d825
--- /dev/null
+++ b/clang/examples/analyzer-plugin/CMakeLists.txt
@@ -0,0 +1,14 @@
+set(MODULE TRUE)
+
+set( LLVM_USED_LIBS
+  clangStaticAnalyzerCore
+  )
+
+set( LLVM_LINK_COMPONENTS support mc)
+
+add_clang_library(SampleAnalyzerPlugin MainCallChecker.cpp)
+
+set_target_properties(SampleAnalyzerPlugin
+  PROPERTIES
+  LINKER_LANGUAGE CXX
+  PREFIX "")
diff --git a/clang/examples/analyzer-plugin/MainCallChecker.cpp b/clang/examples/analyzer-plugin/MainCallChecker.cpp
new file mode 100644
index 0000000..48a9795
--- /dev/null
+++ b/clang/examples/analyzer-plugin/MainCallChecker.cpp
@@ -0,0 +1,53 @@
+#include "clang/StaticAnalyzer/Core/Checker.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include "clang/StaticAnalyzer/Core/CheckerRegistry.h"
+#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
+
+using namespace clang;
+using namespace ento;
+
+namespace {
+class MainCallChecker : public Checker < check::PreStmt<CallExpr> > {
+  mutable OwningPtr<BugType> BT;
+
+public:
+  void checkPreStmt(const CallExpr *CE, CheckerContext &C) const;
+};
+} // end anonymous namespace
+
+void MainCallChecker::checkPreStmt(const CallExpr *CE, CheckerContext &C) const {
+  const ProgramStateRef state = C.getState();
+  const LocationContext *LC = C.getLocationContext();
+  const Expr *Callee = CE->getCallee();
+  const FunctionDecl *FD = state->getSVal(Callee, LC).getAsFunctionDecl();
+
+  if (!FD)
+    return;
+
+  // Get the name of the callee.
+  IdentifierInfo *II = FD->getIdentifier();
+  if (!II)   // if no identifier, not a simple C function
+    return;
+
+  if (II->isStr("main")) {
+    ExplodedNode *N = C.generateSink();
+    if (!N)
+      return;
+
+    if (!BT)
+      BT.reset(new BugType("call to main", "example analyzer plugin"));
+
+    BugReport *report = new BugReport(*BT, BT->getName(), N);
+    report->addRange(Callee->getSourceRange());
+    C.EmitReport(report);    
+  }
+}
+
+// Register plugin!
+extern "C"
+void clang_registerCheckers (CheckerRegistry &registry) {
+  registry.addChecker<MainCallChecker>("example.MainCallChecker", "Disallows calls to functions called main");
+}
+
+extern "C"
+const char clang_analyzerAPIVersionString[] = CLANG_ANALYZER_API_VERSION_STRING;
diff --git a/clang/examples/analyzer-plugin/Makefile b/clang/examples/analyzer-plugin/Makefile
new file mode 100644
index 0000000..8b83bef
--- /dev/null
+++ b/clang/examples/analyzer-plugin/Makefile
@@ -0,0 +1,20 @@
+##===- examples/analyzer-plugin/Makefile -------------------*- Makefile -*-===##
+# 
+#                     The LLVM Compiler Infrastructure
+#
+# This file is distributed under the University of Illinois Open Source
+# License. See LICENSE.TXT for details.
+# 
+##===----------------------------------------------------------------------===##
+
+CLANG_LEVEL := ../..
+LIBRARYNAME = SampleAnalyzerPlugin
+
+LINK_LIBS_IN_SHARED = 0
+LOADABLE_MODULE = 1
+
+include $(CLANG_LEVEL)/Makefile
+
+ifeq ($(OS),Darwin)
+  LDFLAGS=-Wl,-undefined,dynamic_lookup
+endif