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| author | 2020-08-03 15:06:44 +0000 | |
|---|---|---|
| committer | 2020-08-03 15:06:44 +0000 | |
| commit | b64793999546ed8adebaeebd9d8345d18db8927d (patch) | |
| tree | 4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp | |
| parent | Add support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff) | |
| download | wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.tar.xz wireguard-openbsd-b64793999546ed8adebaeebd9d8345d18db8927d.zip | |
Remove LLVM 8.0.1 files.
Diffstat (limited to 'gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp')
| -rw-r--r-- | gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp | 75 |
1 files changed, 0 insertions, 75 deletions
diff --git a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp b/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp deleted file mode 100644 index 41490e45f24..00000000000 --- a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp +++ /dev/null @@ -1,75 +0,0 @@ -//=== PointerSubChecker.cpp - Pointer subtraction checker ------*- C++ -*--===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This files defines PointerSubChecker, a builtin checker that checks for -// pointer subtractions on two pointers pointing to different memory chunks. -// This check corresponds to CWE-469. -// -//===----------------------------------------------------------------------===// - -#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h" -#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" -#include "clang/StaticAnalyzer/Core/Checker.h" -#include "clang/StaticAnalyzer/Core/CheckerManager.h" -#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" - -using namespace clang; -using namespace ento; - -namespace { -class PointerSubChecker - : public Checker< check::PreStmt<BinaryOperator> > { - mutable std::unique_ptr<BuiltinBug> BT; - -public: - void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const; -}; -} - -void PointerSubChecker::checkPreStmt(const BinaryOperator *B, - CheckerContext &C) const { - // When doing pointer subtraction, if the two pointers do not point to the - // same memory chunk, emit a warning. - if (B->getOpcode() != BO_Sub) - return; - - SVal LV = C.getSVal(B->getLHS()); - SVal RV = C.getSVal(B->getRHS()); - - const MemRegion *LR = LV.getAsRegion(); - const MemRegion *RR = RV.getAsRegion(); - - if (!(LR && RR)) - return; - - const MemRegion *BaseLR = LR->getBaseRegion(); - const MemRegion *BaseRR = RR->getBaseRegion(); - - if (BaseLR == BaseRR) - return; - - // Allow arithmetic on different symbolic regions. - if (isa<SymbolicRegion>(BaseLR) || isa<SymbolicRegion>(BaseRR)) - return; - - if (ExplodedNode *N = C.generateNonFatalErrorNode()) { - if (!BT) - BT.reset( - new BuiltinBug(this, "Pointer subtraction", - "Subtraction of two pointers that do not point to " - "the same memory chunk may cause incorrect result.")); - auto R = llvm::make_unique<BugReport>(*BT, BT->getDescription(), N); - R->addRange(B->getSourceRange()); - C.emitReport(std::move(R)); - } -} - -void ento::registerPointerSubChecker(CheckerManager &mgr) { - mgr.registerChecker<PointerSubChecker>(); -} |
