[analyzer] Dump a reproducible, deterministic ID of program state to exploded graph

Differential Revision: https://reviews.llvm.org/D51395

llvm-svn: 341600

2 files changed, 9 insertions, 1 deletions

diff --git a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
index 04190deb7a8..a9901a6cd7d 100644
--- a/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
+++ b/clang/lib/StaticAnalyzer/Core/ExprEngine.cpp
@@ -3141,7 +3141,8 @@ struct DOTGraphTraits<ExplodedNode*> : public DefaultDOTGraphTraits {
     }
 
     ProgramStateRef state = N->getState();
-    Out << "\\|StateID: " << (const void*) state.get()
+    Out << "\\|StateID: " << state->getID() << " ("
+        << (const void*) state.get() << ")"
         << " NodeID: " << (const void*) N << "\\|";
 
     state->printDOT(Out, N->getLocationContext());
diff --git a/clang/lib/StaticAnalyzer/Core/ProgramState.cpp b/clang/lib/StaticAnalyzer/Core/ProgramState.cpp
index 94e2e00d8bb..361255b4b18 100644
--- a/clang/lib/StaticAnalyzer/Core/ProgramState.cpp
+++ b/clang/lib/StaticAnalyzer/Core/ProgramState.cpp
@@ -69,6 +69,13 @@ ProgramState::~ProgramState() {
     stateMgr->getStoreManager().decrementReferenceCount(store);
 }
 
+int64_t ProgramState::getID() const {
+  Optional<int64_t> Out = getStateManager().Alloc.identifyObject(this);
+  assert(Out && "Wrong allocator used");
+  assert(*Out % alignof(ProgramState) == 0 && "Wrong alignment information");
+  return *Out / alignof(ProgramState);
+}
+
 ProgramStateManager::ProgramStateManager(ASTContext &Ctx,
                                          StoreManagerCreator CreateSMgr,
                                          ConstraintManagerCreator CreateCMgr,