Add checker debug.ConfigDumper to dump the contents of the configuration table.

The format of this output is a WIP; largely I'm bringing it up now
for regression testing.  We can evolve the output format over time.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@164953 91177308-0d34-0410-b5e6-96231b3b80d8

lib/StaticAnalyzer/Checkers/Checkers.td

@@ -487,6 +487,10 @@ def CallGraphDumper : Checker<"DumpCallGraph">,
   HelpText<"Display Call Graph">,
   DescFile<"DebugCheckers.cpp">;
 
+def ConfigDumper : Checker<"ConfigDumper">,
+  HelpText<"Dump config table">,
+  DescFile<"DebugCheckers.cpp">;
+
 def TraversalDumper : Checker<"DumpTraversal">,
   HelpText<"Print branch conditions as they are traversed by the engine">,
   DescFile<"TraversalChecker.cpp">;

lib/StaticAnalyzer/Checkers/DebugCheckers.cpp

@@ -144,3 +144,38 @@ public:
 void ento::registerCallGraphDumper(CheckerManager &mgr) {
   mgr.registerChecker<CallGraphDumper>();
 }
+
+
+//===----------------------------------------------------------------------===//
+// ConfigDumper
+//===----------------------------------------------------------------------===//
+
+namespace {
+class ConfigDumper : public Checker< check::EndOfTranslationUnit > {
+public:
+  void checkEndOfTranslationUnit(const TranslationUnitDecl *TU,
+                                 AnalysisManager& mgr,
+                                 BugReporter &BR) const {
+
+    const AnalyzerOptions::ConfigTable &Config = mgr.options.Config;
+    AnalyzerOptions::ConfigTable::const_iterator I =
+      Config.begin(), E = Config.end();
+
+    std::vector<StringRef> Keys;
+    for (; I != E ; ++I) { Keys.push_back(I->getKey()); }
+    sort(Keys.begin(), Keys.end());
+    
+    llvm::errs() << "[config]\n";
+    for (unsigned i = 0, n = Keys.size(); i < n ; ++i) {
+      StringRef Key = Keys[i];
+      I = Config.find(Key);
+      llvm::errs() << Key << " = " << I->second << '\n';
+    }
+    llvm::errs() << "[stats]\n" << "num-entries = " << Keys.size() << '\n';
+  }
+};
+}
+
+void ento::registerConfigDumper(CheckerManager &mgr) {
+  mgr.registerChecker<ConfigDumper>();
+}