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authorpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
committerpatrick <patrick@openbsd.org>2020-08-03 15:06:44 +0000
commitb64793999546ed8adebaeebd9d8345d18db8927d (patch)
tree4357c27b561d73b0e089727c6ed659f2ceff5f47 /gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp
parentAdd support for UTF-8 DISPLAY-HINTs with octet length. For now only (diff)
downloadwireguard-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.cpp75
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>();
-}