forked from OSchip/llvm-project
106 lines
3.7 KiB
C++
106 lines
3.7 KiB
C++
//===- unittests/StaticAnalyzer/StoreTest.cpp -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "Reusables.h"
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#include "clang/Tooling/Tooling.h"
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#include "gtest/gtest.h"
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namespace clang {
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namespace ento {
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namespace {
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// Test that we can put a value into an int-type variable and load it
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// back from that variable. Test what happens if default bindings are used.
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class VariableBindConsumer : public ExprEngineConsumer {
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void performTest(const Decl *D) {
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StoreManager &StMgr = Eng.getStoreManager();
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SValBuilder &SVB = Eng.getSValBuilder();
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MemRegionManager &MRMgr = StMgr.getRegionManager();
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const ASTContext &ACtx = Eng.getContext();
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const auto *VDX0 = findDeclByName<VarDecl>(D, "x0");
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const auto *VDY0 = findDeclByName<VarDecl>(D, "y0");
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const auto *VDZ0 = findDeclByName<VarDecl>(D, "z0");
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const auto *VDX1 = findDeclByName<VarDecl>(D, "x1");
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const auto *VDY1 = findDeclByName<VarDecl>(D, "y1");
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assert(VDX0 && VDY0 && VDZ0 && VDX1 && VDY1);
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const StackFrameContext *SFC =
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Eng.getAnalysisDeclContextManager().getStackFrame(D);
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Loc LX0 = loc::MemRegionVal(MRMgr.getVarRegion(VDX0, SFC));
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Loc LY0 = loc::MemRegionVal(MRMgr.getVarRegion(VDY0, SFC));
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Loc LZ0 = loc::MemRegionVal(MRMgr.getVarRegion(VDZ0, SFC));
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Loc LX1 = loc::MemRegionVal(MRMgr.getVarRegion(VDX1, SFC));
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Loc LY1 = loc::MemRegionVal(MRMgr.getVarRegion(VDY1, SFC));
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Store StInit = StMgr.getInitialStore(SFC).getStore();
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SVal Zero = SVB.makeZeroVal(ACtx.IntTy);
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SVal One = SVB.makeIntVal(1, ACtx.IntTy);
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SVal NarrowZero = SVB.makeZeroVal(ACtx.CharTy);
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// Bind(Zero)
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Store StX0 =
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StMgr.Bind(StInit, LX0, Zero).getStore();
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ASSERT_EQ(Zero, StMgr.getBinding(StX0, LX0, ACtx.IntTy));
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// BindDefaultInitial(Zero)
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Store StY0 =
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StMgr.BindDefaultInitial(StInit, LY0.getAsRegion(), Zero).getStore();
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ASSERT_EQ(Zero, StMgr.getBinding(StY0, LY0, ACtx.IntTy));
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ASSERT_EQ(Zero, *StMgr.getDefaultBinding(StY0, LY0.getAsRegion()));
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// BindDefaultZero()
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Store StZ0 =
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StMgr.BindDefaultZero(StInit, LZ0.getAsRegion()).getStore();
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// BindDefaultZero wipes the region with '0 S8b', not with out Zero.
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// Direct load, however, does give us back the object of the type
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// that we specify for loading.
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ASSERT_EQ(Zero, StMgr.getBinding(StZ0, LZ0, ACtx.IntTy));
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ASSERT_EQ(NarrowZero, *StMgr.getDefaultBinding(StZ0, LZ0.getAsRegion()));
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// Bind(One)
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Store StX1 =
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StMgr.Bind(StInit, LX1, One).getStore();
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ASSERT_EQ(One, StMgr.getBinding(StX1, LX1, ACtx.IntTy));
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// BindDefaultInitial(One)
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Store StY1 =
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StMgr.BindDefaultInitial(StInit, LY1.getAsRegion(), One).getStore();
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ASSERT_EQ(One, StMgr.getBinding(StY1, LY1, ACtx.IntTy));
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ASSERT_EQ(One, *StMgr.getDefaultBinding(StY1, LY1.getAsRegion()));
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}
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public:
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VariableBindConsumer(CompilerInstance &C) : ExprEngineConsumer(C) {}
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bool HandleTopLevelDecl(DeclGroupRef DG) override {
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for (const auto *D : DG)
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performTest(D);
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return true;
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}
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};
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class VariableBindAction : public ASTFrontendAction {
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public:
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std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &Compiler,
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StringRef File) override {
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return llvm::make_unique<VariableBindConsumer>(Compiler);
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}
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};
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TEST(Store, VariableBind) {
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EXPECT_TRUE(tooling::runToolOnCode(
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new VariableBindAction, "void foo() { int x0, y0, z0, x1, y1; }"));
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}
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} // namespace
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} // namespace ento
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} // namespace clang
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