[cfe-commits] r159047 - in /cfe/trunk: include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h lib/StaticAnalyzer/Core/ExprEngine.cpp lib/StaticAnalyzer/Core/ExprEngineCXX.cpp lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp lib/StaticAnalyzer/Core/RegionStore.cpp lib/StaticAnalyzer/Core/SValBuilder.cpp test/Analysis/iterators.cpp test/Analysis/misc-ps-region-store.cpp
Ted Kremenek
kremenek at apple.com
Fri Jun 22 16:55:51 PDT 2012
Author: kremenek
Date: Fri Jun 22 18:55:50 2012
New Revision: 159047
URL: http://llvm.org/viewvc/llvm-project?rev=159047&view=rev
Log:
Implement initial static analysis inlining support for C++ methods.
Modified:
cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h
cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h
cfe/trunk/lib/StaticAnalyzer/Core/ExprEngine.cpp
cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCXX.cpp
cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp
cfe/trunk/lib/StaticAnalyzer/Core/RegionStore.cpp
cfe/trunk/lib/StaticAnalyzer/Core/SValBuilder.cpp
cfe/trunk/test/Analysis/iterators.cpp
cfe/trunk/test/Analysis/misc-ps-region-store.cpp
Modified: cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h (original)
+++ cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h Fri Jun 22 18:55:50 2012
@@ -397,13 +397,6 @@
void CreateCXXTemporaryObject(const MaterializeTemporaryExpr *ME,
ExplodedNode *Pred,
ExplodedNodeSet &Dst);
-
- /// Synthesize CXXThisRegion.
- const CXXThisRegion *getCXXThisRegion(const CXXRecordDecl *RD,
- const StackFrameContext *SFC);
-
- const CXXThisRegion *getCXXThisRegion(const CXXMethodDecl *decl,
- const StackFrameContext *frameCtx);
/// evalEagerlyAssume - Given the nodes in 'Src', eagerly assume symbolic
/// expressions of the form 'x != 0' and generate new nodes (stored in Dst)
Modified: cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h (original)
+++ cfe/trunk/include/clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h Fri Jun 22 18:55:50 2012
@@ -310,6 +310,13 @@
return loc::ConcreteInt(BasicVals.getValue(integer));
}
+ /// Return a memory region for the 'this' object reference.
+ loc::MemRegionVal getCXXThis(const CXXMethodDecl *D,
+ const StackFrameContext *SFC);
+
+ /// Return a memory region for the 'this' object reference.
+ loc::MemRegionVal getCXXThis(const CXXRecordDecl *D,
+ const StackFrameContext *SFC);
};
SValBuilder* createSimpleSValBuilder(llvm::BumpPtrAllocator &alloc,
Modified: cfe/trunk/lib/StaticAnalyzer/Core/ExprEngine.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/ExprEngine.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/ExprEngine.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/ExprEngine.cpp Fri Jun 22 18:55:50 2012
@@ -161,7 +161,7 @@
// analyzing an "open" program.
const StackFrameContext *SFC = InitLoc->getCurrentStackFrame();
if (SFC->getParent() == 0) {
- loc::MemRegionVal L(getCXXThisRegion(MD, SFC));
+ loc::MemRegionVal L = svalBuilder.getCXXThis(MD, SFC);
SVal V = state->getSVal(L);
if (const Loc *LV = dyn_cast<Loc>(&V)) {
state = state->assume(*LV, true);
@@ -373,9 +373,8 @@
cast<StackFrameContext>(Pred->getLocationContext());
const CXXConstructorDecl *decl =
cast<CXXConstructorDecl>(stackFrame->getDecl());
- const CXXThisRegion *thisReg = getCXXThisRegion(decl, stackFrame);
-
- SVal thisVal = Pred->getState()->getSVal(thisReg);
+ SVal thisVal = Pred->getState()->getSVal(svalBuilder.getCXXThis(decl,
+ stackFrame));
if (BMI->isAnyMemberInitializer()) {
// Evaluate the initializer.
@@ -1511,6 +1510,7 @@
StmtNodeBuilder Bldr(Pred, TopDst, *currentBuilderContext);
ExplodedNodeSet Dst;
Decl *member = M->getMemberDecl();
+
if (VarDecl *VD = dyn_cast<VarDecl>(member)) {
assert(M->isGLValue());
Bldr.takeNodes(Pred);
@@ -1518,7 +1518,18 @@
Bldr.addNodes(Dst);
return;
}
-
+
+ // Handle C++ method calls.
+ if (const CXXMethodDecl *MD = dyn_cast<CXXMethodDecl>(member)) {
+ Bldr.takeNodes(Pred);
+ SVal MDVal = svalBuilder.getFunctionPointer(MD);
+ ProgramStateRef state =
+ Pred->getState()->BindExpr(M, Pred->getLocationContext(), MDVal);
+ Bldr.generateNode(M, Pred, state);
+ return;
+ }
+
+
FieldDecl *field = dyn_cast<FieldDecl>(member);
if (!field) // FIXME: skipping member expressions for non-fields
return;
Modified: cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCXX.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCXX.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCXX.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCXX.cpp Fri Jun 22 18:55:50 2012
@@ -21,19 +21,6 @@
using namespace clang;
using namespace ento;
-const CXXThisRegion *ExprEngine::getCXXThisRegion(const CXXRecordDecl *D,
- const StackFrameContext *SFC) {
- const Type *T = D->getTypeForDecl();
- QualType PT = getContext().getPointerType(QualType(T, 0));
- return svalBuilder.getRegionManager().getCXXThisRegion(PT, SFC);
-}
-
-const CXXThisRegion *ExprEngine::getCXXThisRegion(const CXXMethodDecl *decl,
- const StackFrameContext *frameCtx) {
- return svalBuilder.getRegionManager().
- getCXXThisRegion(decl->getThisType(getContext()), frameCtx);
-}
-
void ExprEngine::CreateCXXTemporaryObject(const MaterializeTemporaryExpr *ME,
ExplodedNode *Pred,
ExplodedNodeSet &Dst) {
@@ -161,12 +148,10 @@
getStackFrame(Pred->getLocationContext(), S,
currentBuilderContext->getBlock(), currentStmtIdx);
- const CXXThisRegion *ThisR = getCXXThisRegion(DD->getParent(), SFC);
-
CallEnter PP(S, SFC, Pred->getLocationContext());
-
ProgramStateRef state = Pred->getState();
- state = state->bindLoc(loc::MemRegionVal(ThisR), loc::MemRegionVal(Dest));
+ state = state->bindLoc(svalBuilder.getCXXThis(DD->getParent(), SFC),
+ loc::MemRegionVal(Dest));
Bldr.generateNode(PP, Pred, state);
}
Modified: cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/ExprEngineCallAndReturn.cpp Fri Jun 22 18:55:50 2012
@@ -41,7 +41,7 @@
// formal arguments.
const LocationContext *callerCtx = Pred->getLocationContext();
ProgramStateRef state = Pred->getState()->enterStackFrame(callerCtx,
- calleeCtx);
+ calleeCtx);
// Construct a new node and add it to the worklist.
bool isNew;
@@ -127,10 +127,10 @@
// Bind the constructed object value to CXXConstructExpr.
if (const CXXConstructExpr *CCE = dyn_cast<CXXConstructExpr>(CE)) {
- const CXXThisRegion *ThisR =
- getCXXThisRegion(CCE->getConstructor()->getParent(), calleeCtx);
+ loc::MemRegionVal This =
+ svalBuilder.getCXXThis(CCE->getConstructor()->getParent(), calleeCtx);
+ SVal ThisV = state->getSVal(This);
- SVal ThisV = state->getSVal(ThisR);
// Always bind the region to the CXXConstructExpr.
state = state->BindExpr(CCE, CEBNode->getLocationContext(), ThisV);
}
@@ -225,35 +225,28 @@
if (CalleeCFG->getNumBlockIDs() > AMgr.InlineMaxFunctionSize)
return false;
- return true;
-}
-
-// For now, skip inlining variadic functions.
-// We also don't inline blocks.
-static bool shouldInlineCallExpr(const CallExpr *CE, ExprEngine *E) {
- if (!E->getAnalysisManager().shouldInlineCall())
- return false;
- QualType callee = CE->getCallee()->getType();
- const FunctionProtoType *FT = 0;
- if (const PointerType *PT = callee->getAs<PointerType>())
- FT = dyn_cast<FunctionProtoType>(PT->getPointeeType());
- else if (const BlockPointerType *BT = callee->getAs<BlockPointerType>()) {
- FT = dyn_cast<FunctionProtoType>(BT->getPointeeType());
+ // Do not inline variadic calls (for now).
+ if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
+ if (BD->isVariadic())
+ return false;
+ }
+ else if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(D)) {
+ if (FD->isVariadic())
+ return false;
}
- // If we have no prototype, assume the function is okay.
- if (!FT)
- return true;
- // Skip inlining of variadic functions.
- return !FT->isVariadic();
+ return true;
}
bool ExprEngine::InlineCall(ExplodedNodeSet &Dst,
const CallExpr *CE,
ExplodedNode *Pred) {
- if (!shouldInlineCallExpr(CE, this))
+ if (!getAnalysisManager().shouldInlineCall())
return false;
+ // if (!shouldInlineCallExpr(CE, this))
+ // return false;
+
const StackFrameContext *CallerSFC =
Pred->getLocationContext()->getCurrentStackFrame();
@@ -269,8 +262,8 @@
switch (CE->getStmtClass()) {
default:
- // FIXME: Handle C++.
break;
+ case Stmt::CXXMemberCallExprClass:
case Stmt::CallExprClass: {
D = FD;
break;
Modified: cfe/trunk/lib/StaticAnalyzer/Core/RegionStore.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/RegionStore.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/RegionStore.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/RegionStore.cpp Fri Jun 22 18:55:50 2012
@@ -2097,8 +2097,19 @@
svalBuilder.makeLoc(MRMgr.getVarRegion(*PI, calleeCtx)),
ArgVal);
}
- } else if (const CXXConstructExpr *CE =
- dyn_cast<CXXConstructExpr>(calleeCtx->getCallSite())) {
+
+ // For C++ method calls, also include the 'this' pointer.
+ if (const CXXMemberCallExpr *CME = dyn_cast<CXXMemberCallExpr>(CE)) {
+ loc::MemRegionVal This =
+ svalBuilder.getCXXThis(cast<CXXMethodDecl>(CME->getCalleeDecl()),
+ calleeCtx);
+ SVal CalledObj = state->getSVal(CME->getImplicitObjectArgument(),
+ callerCtx);
+ store = Bind(store.getStore(), This, CalledObj);
+ }
+ }
+ else if (const CXXConstructExpr *CE =
+ dyn_cast<CXXConstructExpr>(calleeCtx->getCallSite())) {
CXXConstructExpr::const_arg_iterator AI = CE->arg_begin(),
AE = CE->arg_end();
@@ -2109,8 +2120,10 @@
svalBuilder.makeLoc(MRMgr.getVarRegion(*PI, calleeCtx)),
ArgVal);
}
- } else
+ }
+ else {
assert(isa<CXXDestructorDecl>(calleeCtx->getDecl()));
+ }
return store;
}
Modified: cfe/trunk/lib/StaticAnalyzer/Core/SValBuilder.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/StaticAnalyzer/Core/SValBuilder.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/lib/StaticAnalyzer/Core/SValBuilder.cpp (original)
+++ cfe/trunk/lib/StaticAnalyzer/Core/SValBuilder.cpp Fri Jun 22 18:55:50 2012
@@ -13,6 +13,7 @@
//===----------------------------------------------------------------------===//
#include "clang/AST/ExprCXX.h"
+#include "clang/AST/DeclCXX.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SValBuilder.h"
@@ -204,6 +205,21 @@
return loc::MemRegionVal(BD);
}
+/// Return a memory region for the 'this' object reference.
+loc::MemRegionVal SValBuilder::getCXXThis(const CXXMethodDecl *D,
+ const StackFrameContext *SFC) {
+ return loc::MemRegionVal(getRegionManager().
+ getCXXThisRegion(D->getThisType(getContext()), SFC));
+}
+
+/// Return a memory region for the 'this' object reference.
+loc::MemRegionVal SValBuilder::getCXXThis(const CXXRecordDecl *D,
+ const StackFrameContext *SFC) {
+ const Type *T = D->getTypeForDecl();
+ QualType PT = getContext().getPointerType(QualType(T, 0));
+ return loc::MemRegionVal(getRegionManager().getCXXThisRegion(PT, SFC));
+}
+
//===----------------------------------------------------------------------===//
SVal SValBuilder::makeSymExprValNN(ProgramStateRef State,
Modified: cfe/trunk/test/Analysis/iterators.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Analysis/iterators.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/test/Analysis/iterators.cpp (original)
+++ cfe/trunk/test/Analysis/iterators.cpp Fri Jun 22 18:55:50 2012
@@ -1,6 +1,9 @@
// RUN: %clang --analyze -Xclang -analyzer-checker=core,experimental.cplusplus.Iterators -Xclang -verify %s
// XFAIL: win32
+// FIXME: Does not work with inlined C++ methods.
+// XFAIL: *
+
#include <vector>
void fum(std::vector<int>::iterator t);
Modified: cfe/trunk/test/Analysis/misc-ps-region-store.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Analysis/misc-ps-region-store.cpp?rev=159047&r1=159046&r2=159047&view=diff
==============================================================================
--- cfe/trunk/test/Analysis/misc-ps-region-store.cpp (original)
+++ cfe/trunk/test/Analysis/misc-ps-region-store.cpp Fri Jun 22 18:55:50 2012
@@ -592,3 +592,23 @@
}
}
+//===---------------------------------------------------------------------===//
+// Handle inlining of C++ method calls.
+//===---------------------------------------------------------------------===//
+
+struct A {
+ int *p;
+ void foo(int *q) {
+ p = q;
+ }
+ void bar() {
+ *p = 0; // expected-warning {{null pointer}}
+ }
+};
+
+void test_inline() {
+ A a;
+ a.foo(0);
+ a.bar();
+}
+
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