Make a bunch of new data structures for the new analysis

engine of the new translation unit. State marshal is there but no real
work is done. End nodes are passed back.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@109105 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 73 insertions, 4 deletions

diff --git a/lib/Checker/GRCoreEngine.cpp b/lib/Checker/GRCoreEngine.cpp
index a457b37ee1..b0be709661 100644
--- a/lib/Checker/GRCoreEngine.cpp
+++ b/lib/Checker/GRCoreEngine.cpp
@@ -12,8 +12,10 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "clang/Checker/PathSensitive/AnalysisManager.h"
 #include "clang/Checker/PathSensitive/GRCoreEngine.h"
 #include "clang/Checker/PathSensitive/GRExprEngine.h"
+#include "clang/Index/TranslationUnit.h"
 #include "clang/AST/Expr.h"
 #include "llvm/Support/Casting.h"
 #include "llvm/ADT/DenseMap.h"
@@ -24,6 +26,12 @@ using llvm::cast;
 using llvm::isa;
 using namespace clang;
 
+// This should be removed in the future.
+namespace clang {
+GRTransferFuncs* MakeCFRefCountTF(ASTContext& Ctx, bool GCEnabled,
+                                  const LangOptions& lopts);
+}
+
 //===----------------------------------------------------------------------===//
 // Worklist classes for exploration of reachable states.
 //===----------------------------------------------------------------------===//
@@ -120,7 +128,8 @@ GRWorkList* GRWorkList::MakeBFSBlockDFSContents() {
 //===----------------------------------------------------------------------===//
 
 /// ExecuteWorkList - Run the worklist algorithm for a maximum number of steps.
-bool GRCoreEngine::ExecuteWorkList(const LocationContext *L, unsigned Steps) {
+bool GRCoreEngine::ExecuteWorkList(const LocationContext *L, unsigned Steps,
+                                   const GRState *InitState) {
 
   if (G->num_roots() == 0) { // Initialize the analysis by constructing
     // the root if none exists.
@@ -143,8 +152,11 @@ bool GRCoreEngine::ExecuteWorkList(const LocationContext *L, unsigned Steps) {
     // Set the current block counter to being empty.
     WList->setBlockCounter(BCounterFactory.GetEmptyCounter());
 
-    // Generate the root.
-    GenerateNode(StartLoc, getInitialState(L), 0);
+    if (!InitState)
+      // Generate the root.
+      GenerateNode(StartLoc, getInitialState(L), 0);
+    else
+      GenerateNode(StartLoc, InitState, 0);
   }
 
   while (Steps && WList->hasWork()) {
@@ -192,6 +204,17 @@ bool GRCoreEngine::ExecuteWorkList(const LocationContext *L, unsigned Steps) {
   return WList->hasWork();
 }
 
+void GRCoreEngine::ExecuteWorkListWithInitialState(const LocationContext *L, 
+                                                   unsigned Steps,
+                                                   const GRState *InitState, 
+                                                   ExplodedNodeSet &Dst) {
+  ExecuteWorkList(L, Steps, InitState);
+  for (llvm::SmallVectorImpl<ExplodedNode*>::iterator I = G->EndNodes.begin(), 
+                                           E = G->EndNodes.end(); I != E; ++I) {
+    Dst.Add(*I);
+  }
+}
+
 void GRCoreEngine::HandleCallEnter(const CallEnter &L, const CFGBlock *Block,
                                    unsigned Index, ExplodedNode *Pred) {
   GRCallEnterNodeBuilder Builder(*this, Pred, L.getCallExpr(), 
@@ -662,7 +685,53 @@ void GRCallEnterNodeBuilder::GenerateNode(const GRState *state,
   // Check if the callee is in the same translation unit.
   if (CalleeCtx->getTranslationUnit() != 
       Pred->getLocationContext()->getTranslationUnit()) {
-    assert(0 && "to be implemented");
+    // Create a new engine. We must be careful that the new engine should not
+    // reference data structures owned by the old engine.
+
+    AnalysisManager &OldMgr = Eng.SubEngine.getAnalysisManager();
+    
+    // Get the callee's translation unit.
+    idx::TranslationUnit *TU = CalleeCtx->getTranslationUnit();
+
+    // Create a new AnalysisManager with components of the callee's
+    // TranslationUnit.
+    // The Diagnostic is actually shared when we create ASTUnits from PCH files.
+    AnalysisManager AMgr(TU->getASTContext(), TU->getDiagnostic(), 
+                         OldMgr.getLangOptions(), 
+                         OldMgr.getPathDiagnosticClient(),
+                         OldMgr.getStoreManagerCreator(),
+                         OldMgr.getConstraintManagerCreator(),
+                         OldMgr.getIndexer(),
+                         OldMgr.getMaxNodes(), OldMgr.getMaxLoop(),
+                         OldMgr.shouldVisualizeGraphviz(),
+                         OldMgr.shouldVisualizeUbigraph(),
+                         OldMgr.shouldPurgeDead(),
+                         OldMgr.shouldEagerlyAssume(),
+                         OldMgr.shouldTrimGraph(),
+                         OldMgr.shouldInlineCall());
+    llvm::OwningPtr<GRTransferFuncs> TF(MakeCFRefCountTF(AMgr.getASTContext(),
+                                                         /* GCEnabled */ false,
+                                                        AMgr.getLangOptions()));
+    // Create the new engine.
+    GRExprEngine NewEng(AMgr, TF.take());
+
+    // Create the new LocationContext.
+    AnalysisContext *NewAnaCtx = AMgr.getAnalysisContext(CalleeCtx->getDecl(), 
+                                               CalleeCtx->getTranslationUnit());
+    const StackFrameContext *OldLocCtx = cast<StackFrameContext>(LocCtx);
+    const StackFrameContext *NewLocCtx = AMgr.getStackFrame(NewAnaCtx, 
+                                               OldLocCtx->getParent(),
+                                               OldLocCtx->getCallSite(),
+                                               OldLocCtx->getCallSiteBlock(), 
+                                               OldLocCtx->getIndex());
+
+    // Now create an initial state for the new engine.
+    const GRState *NewState = NewEng.getStateManager().MarshalState(state,
+                                                                    NewLocCtx);
+    ExplodedNodeSet ReturnNodes;
+    NewEng.ExecuteWorkListWithInitialState(NewLocCtx, AMgr.getMaxNodes(), 
+                                           NewState, ReturnNodes);
+    return;
   }
 
   // Get the callee entry block.