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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/ObjCContainersChecker.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/ObjCContainersChecker.cpp')
| -rw-r--r-- | gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp | 189 |
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 deleted file mode 100644 index 1c8c0d8dedd..00000000000 --- a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ObjCContainersChecker.cpp +++ /dev/null @@ -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>(); -} |
