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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/ObjCContainersChecker.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/ObjCContainersChecker.cpp')
-rw-r--r--gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp189
1 files changed, 0 insertions, 189 deletions
diff --git a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp b/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp
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--- a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp
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@@ -1,189 +0,0 @@
-//== ObjCContainersChecker.cpp - Path sensitive checker for CFArray *- C++ -*=//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// Performs path sensitive checks of Core Foundation static containers like
-// CFArray.
-// 1) Check for buffer overflows:
-// In CFArrayGetArrayAtIndex( myArray, index), if the index is outside the
-// index space of theArray (0 to N-1 inclusive (where N is the count of
-// theArray), the behavior is undefined.
-//
-//===----------------------------------------------------------------------===//
-
-#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
-#include "clang/AST/ParentMap.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"
-#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
-
-using namespace clang;
-using namespace ento;
-
-namespace {
-class ObjCContainersChecker : public Checker< check::PreStmt<CallExpr>,
- check::PostStmt<CallExpr>,
- check::PointerEscape> {
- mutable std::unique_ptr<BugType> BT;
- inline void initBugType() const {
- if (!BT)
- BT.reset(new BugType(this, "CFArray API",
- categories::CoreFoundationObjectiveC));
- }
-
- inline SymbolRef getArraySym(const Expr *E, CheckerContext &C) const {
- SVal ArrayRef = C.getSVal(E);
- SymbolRef ArraySym = ArrayRef.getAsSymbol();
- return ArraySym;
- }
-
- void addSizeInfo(const Expr *Array, const Expr *Size,
- CheckerContext &C) const;
-
-public:
- /// A tag to id this checker.
- static void *getTag() { static int Tag; return &Tag; }
-
- void checkPostStmt(const CallExpr *CE, CheckerContext &C) const;
- void checkPreStmt(const CallExpr *CE, CheckerContext &C) const;
- ProgramStateRef checkPointerEscape(ProgramStateRef State,
- const InvalidatedSymbols &Escaped,
- const CallEvent *Call,
- PointerEscapeKind Kind) const;
-
- void printState(raw_ostream &OS, ProgramStateRef State,
- const char *NL, const char *Sep) const;
-};
-} // end anonymous namespace
-
-// ProgramState trait - a map from array symbol to its state.
-REGISTER_MAP_WITH_PROGRAMSTATE(ArraySizeMap, SymbolRef, DefinedSVal)
-
-void ObjCContainersChecker::addSizeInfo(const Expr *Array, const Expr *Size,
- CheckerContext &C) const {
- ProgramStateRef State = C.getState();
- SVal SizeV = C.getSVal(Size);
- // Undefined is reported by another checker.
- if (SizeV.isUnknownOrUndef())
- return;
-
- // Get the ArrayRef symbol.
- SVal ArrayRef = C.getSVal(Array);
- SymbolRef ArraySym = ArrayRef.getAsSymbol();
- if (!ArraySym)
- return;
-
- C.addTransition(
- State->set<ArraySizeMap>(ArraySym, SizeV.castAs<DefinedSVal>()));
-}
-
-void ObjCContainersChecker::checkPostStmt(const CallExpr *CE,
- CheckerContext &C) const {
- StringRef Name = C.getCalleeName(CE);
- if (Name.empty() || CE->getNumArgs() < 1)
- return;
-
- // Add array size information to the state.
- if (Name.equals("CFArrayCreate")) {
- if (CE->getNumArgs() < 3)
- return;
- // Note, we can visit the Create method in the post-visit because
- // the CFIndex parameter is passed in by value and will not be invalidated
- // by the call.
- addSizeInfo(CE, CE->getArg(2), C);
- return;
- }
-
- if (Name.equals("CFArrayGetCount")) {
- addSizeInfo(CE->getArg(0), CE, C);
- return;
- }
-}
-
-void ObjCContainersChecker::checkPreStmt(const CallExpr *CE,
- CheckerContext &C) const {
- StringRef Name = C.getCalleeName(CE);
- if (Name.empty() || CE->getNumArgs() < 2)
- return;
-
- // Check the array access.
- if (Name.equals("CFArrayGetValueAtIndex")) {
- ProgramStateRef State = C.getState();
- // Retrieve the size.
- // Find out if we saw this array symbol before and have information about
- // it.
- const Expr *ArrayExpr = CE->getArg(0);
- SymbolRef ArraySym = getArraySym(ArrayExpr, C);
- if (!ArraySym)
- return;
-
- const DefinedSVal *Size = State->get<ArraySizeMap>(ArraySym);
-
- if (!Size)
- return;
-
- // Get the index.
- const Expr *IdxExpr = CE->getArg(1);
- SVal IdxVal = C.getSVal(IdxExpr);
- if (IdxVal.isUnknownOrUndef())
- return;
- DefinedSVal Idx = IdxVal.castAs<DefinedSVal>();
-
- // Now, check if 'Idx in [0, Size-1]'.
- const QualType T = IdxExpr->getType();
- ProgramStateRef StInBound = State->assumeInBound(Idx, *Size, true, T);
- ProgramStateRef StOutBound = State->assumeInBound(Idx, *Size, false, T);
- if (StOutBound && !StInBound) {
- ExplodedNode *N = C.generateErrorNode(StOutBound);
- if (!N)
- return;
- initBugType();
- auto R = llvm::make_unique<BugReport>(*BT, "Index is out of bounds", N);
- R->addRange(IdxExpr->getSourceRange());
- bugreporter::trackExpressionValue(N, IdxExpr, *R,
- /*EnableNullFPSuppression=*/false);
- C.emitReport(std::move(R));
- return;
- }
- }
-}
-
-ProgramStateRef
-ObjCContainersChecker::checkPointerEscape(ProgramStateRef State,
- const InvalidatedSymbols &Escaped,
- const CallEvent *Call,
- PointerEscapeKind Kind) const {
- for (const auto &Sym : Escaped) {
- // When a symbol for a mutable array escapes, we can't reason precisely
- // about its size any more -- so remove it from the map.
- // Note that we aren't notified here when a CFMutableArrayRef escapes as a
- // CFArrayRef. This is because CFArrayRef is typedef'd as a pointer to a
- // const-qualified type.
- State = State->remove<ArraySizeMap>(Sym);
- }
- return State;
-}
-
-void ObjCContainersChecker::printState(raw_ostream &OS, ProgramStateRef State,
- const char *NL, const char *Sep) const {
- ArraySizeMapTy Map = State->get<ArraySizeMap>();
- if (Map.isEmpty())
- return;
-
- OS << Sep << "ObjC container sizes :" << NL;
- for (auto I : Map) {
- OS << I.first << " : " << I.second << NL;
- }
-}
-
-/// Register checker.
-void ento::registerObjCContainersChecker(CheckerManager &mgr) {
- mgr.registerChecker<ObjCContainersChecker>();
-}