72 lines
2.3 KiB
C++
72 lines
2.3 KiB
C++
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//===- unittests/StaticAnalyzer/SymbolReaperTest.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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class SuperRegionLivenessConsumer : public ExprEngineConsumer {
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void performTest(const Decl *D) {
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const auto *FD = findDeclByName<FieldDecl>(D, "x");
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const auto *VD = findDeclByName<VarDecl>(D, "s");
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assert(FD && VD);
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// The variable must belong to a stack frame,
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// otherwise SymbolReaper would think it's a global.
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const StackFrameContext *SFC =
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Eng.getAnalysisDeclContextManager().getStackFrame(D);
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// Create regions for 's' and 's.x'.
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const VarRegion *VR = Eng.getRegionManager().getVarRegion(VD, SFC);
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const FieldRegion *FR = Eng.getRegionManager().getFieldRegion(FD, VR);
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// Pass a null location context to the SymbolReaper so that
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// it was thinking that the variable is dead.
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SymbolReaper SymReaper((StackFrameContext *)nullptr, (Stmt *)nullptr,
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Eng.getSymbolManager(), Eng.getStoreManager());
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SymReaper.markLive(FR);
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EXPECT_TRUE(SymReaper.isLiveRegion(VR));
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}
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public:
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SuperRegionLivenessConsumer(CompilerInstance &C) : ExprEngineConsumer(C) {}
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~SuperRegionLivenessConsumer() override {}
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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 SuperRegionLivenessAction : public ASTFrontendAction {
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public:
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SuperRegionLivenessAction() {}
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std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &Compiler,
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StringRef File) override {
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return std::make_unique<SuperRegionLivenessConsumer>(Compiler);
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}
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};
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// Test that marking s.x as live would also make s live.
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TEST(SymbolReaper, SuperRegionLiveness) {
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EXPECT_TRUE(
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tooling::runToolOnCode(std::make_unique<SuperRegionLivenessAction>(),
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"void foo() { struct S { int x; } s; }"));
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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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