commit 77a33a71701b59affb5337d9e2b57d69bc095c7d
author Jordy Rose <jediknil@belkadan.com> Wed Aug 17 01:30:59 2011 +0000
committer Jordy Rose <jediknil@belkadan.com> Wed Aug 17 01:30:59 2011 +0000
tree 922ce1739cd3a9b18109432b7c7a90a38df963d1
parent bc84532e762a41141bd94037cd5d1133f234088e

[analyzer] Add basic support for pluggable checkers.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@137802 91177308-0d34-0410-b5e6-96231b3b80d8

examples/analyzer-plugin/MainCallChecker.cpp

diff --git a/examples/analyzer-plugin/MainCallChecker.cpp b/examples/analyzer-plugin/MainCallChecker.cpp
new file mode 100644
index 0000000..bf75389
--- /dev/null
+++ b/examples/analyzer-plugin/MainCallChecker.cpp
@@ -0,0 +1,52 @@
+#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 llvm::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 ProgramState *state = C.getState();
+  const Expr *Callee = CE->getCallee();
+  const FunctionDecl *FD = state->getSVal(Callee).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 BuiltinBug("call to main"));
+
+    RangedBugReport *report = new RangedBugReport(*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;