Add clang-cc option "-analyzer-experimental-checks" to enable experimental path-sensitive checks. The idea is to separate "barely working" or "skunkworks" checks from ones that should always run. Later we need more fine-grain checker control.

llvm-svn: 87053

clang/include/clang/Analysis/LocalCheckers.h

@@ -50,6 +50,7 @@ void CheckObjCInstMethSignature(const ObjCImplementationDecl *ID,
 void CheckObjCUnusedIvar(const ObjCImplementationDecl *D, BugReporter& BR);
 
 void RegisterAppleChecks(GRExprEngine& Eng, const Decl &D);
+void RegisterExperimentalChecks(GRExprEngine &Eng);
 
 void CheckSecuritySyntaxOnly(const Decl *D, BugReporter &BR);
 

clang/include/clang/Frontend/AnalysisConsumer.h

@@ -67,6 +67,7 @@ public:
   unsigned TrimGraph : 1;
   unsigned VisualizeEGDot : 1;
   unsigned VisualizeEGUbi : 1;
+  unsigned EnableExperimentalChecks : 1;
 
 public:
   AnalyzerOptions() {
@@ -77,6 +78,7 @@ public:
     TrimGraph = 0;
     VisualizeEGDot = 0;
     VisualizeEGUbi = 0;
+    EnableExperimentalChecks = 0;
   }
 };
 

clang/lib/Analysis/CMakeLists.txt

@@ -30,6 +30,7 @@ add_clang_library(clangAnalysis
   GRBlockCounter.cpp
   GRCoreEngine.cpp
   GRExprEngine.cpp
+  GRExprEngineExperimentalChecks.cpp
   GRExprEngineInternalChecks.cpp
   GRState.cpp
   LiveVariables.cpp

clang/lib/Analysis/GRExprEngineExperimentalChecks.cpp

@@ -0,0 +1,23 @@
+//=-- GRExprEngineExperimentalChecks.h ------------------------------*- C++ -*-=
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file defines functions to instantiate and register experimental
+//  checks in GRExprEngine.
+//
+//===----------------------------------------------------------------------===//
+
+#include "GRExprEngineExperimentalChecks.h"
+#include "clang/Analysis/LocalCheckers.h"
+
+using namespace clang;
+
+void clang::RegisterExperimentalChecks(GRExprEngine &Eng) {
+  RegisterPthreadLockChecker(Eng);  
+}
+

clang/lib/Frontend/AnalysisConsumer.cpp

@@ -332,7 +332,9 @@ static void ActionGRExprEngine(AnalysisConsumer &C, AnalysisManager& mgr, Decl *
   Eng.RegisterInternalChecks(); // FIXME: Internal checks should just
                                 // automatically register.
   RegisterAppleChecks(Eng, *D);
-
+  
+  if (C.Opts.EnableExperimentalChecks)
+    RegisterExperimentalChecks(Eng);
 
   // Set the graph auditor.
   llvm::OwningPtr<ExplodedNode::Auditor> Auditor;

clang/tools/clang-cc/Options.cpp

@@ -78,11 +78,15 @@ static llvm::cl::opt<bool>
 AnalyzeAll("analyzer-opt-analyze-headers",
     llvm::cl::desc("Force the static analyzer to analyze "
                    "functions defined in header files"));
-
+  
 static llvm::cl::opt<bool>
 AnalyzerDisplayProgress("analyzer-display-progress",
-          llvm::cl::desc("Emit verbose output about the analyzer's progress."));
+          llvm::cl::desc("Emit verbose output about the analyzer's progress"));
 
+static llvm::cl::opt<bool>
+AnalyzerExperimentalChecks("analyzer-experimental-checks",
+          llvm::cl::desc("Use experimental path-sensitive checks"));
+  
 static llvm::cl::opt<std::string>
 AnalyzeSpecificFunction("analyze-function",
                llvm::cl::desc("Run analysis on specific function"));
@@ -91,13 +95,13 @@ static llvm::cl::opt<bool>
 EagerlyAssume("analyzer-eagerly-assume",
           llvm::cl::init(false),
               llvm::cl::desc("Eagerly assume the truth/falseness of some "
-                             "symbolic constraints."));
+                             "symbolic constraints"));
 
 static llvm::cl::opt<bool>
 PurgeDead("analyzer-purge-dead",
           llvm::cl::init(true),
           llvm::cl::desc("Remove dead symbols, bindings, and constraints before"
-                         " processing a statement."));
+                         " processing a statement"));
 
 static llvm::cl::opt<bool>
 TrimGraph("trim-egraph",
@@ -126,6 +130,7 @@ void clang::InitializeAnalyzerOptions(AnalyzerOptions &Opts) {
   Opts.PurgeDead = PurgeDead;
   Opts.EagerlyAssume = EagerlyAssume;
   Opts.AnalyzeSpecificFunction = AnalyzeSpecificFunction;
+  Opts.EnableExperimentalChecks = AnalyzerExperimentalChecks;
   Opts.TrimGraph = TrimGraph;
 }