1 files changed, 0 insertions, 155 deletions
diff --git a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp b/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
deleted file mode 100644
index 673608db1a1..00000000000
--- a/gnu/llvm/tools/clang/lib/StaticAnalyzer/Checkers/ChrootChecker.cpp
+++ /dev/null
@@ -1,155 +0,0 @@
-//===- Chrootchecker.cpp -------- Basic security checks ---------*- C++ -*-===//
-//
-//                     The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-//  This file defines chroot checker, which checks improper use of chroot.
-//
-//===----------------------------------------------------------------------===//
-
-#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"
-#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
-
-using namespace clang;
-using namespace ento;
-
-namespace {
-
-// enum value that represent the jail state
-enum Kind { NO_CHROOT, ROOT_CHANGED, JAIL_ENTERED };
-
-bool isRootChanged(intptr_t k) { return k == ROOT_CHANGED; }
-//bool isJailEntered(intptr_t k) { return k == JAIL_ENTERED; }
-
-// This checker checks improper use of chroot.
-// The state transition:
-// NO_CHROOT ---chroot(path)--> ROOT_CHANGED ---chdir(/) --> JAIL_ENTERED
-//                                  |                               |
-//         ROOT_CHANGED<--chdir(..)--      JAIL_ENTERED<--chdir(..)--
-//                                  |                               |
-//                      bug<--foo()--          JAIL_ENTERED<--foo()--
-class ChrootChecker : public Checker<eval::Call, check::PreStmt<CallExpr> > {
-  mutable IdentifierInfo *II_chroot, *II_chdir;
-  // This bug refers to possibly break out of a chroot() jail.
-  mutable std::unique_ptr<BuiltinBug> BT_BreakJail;
-
-public:
-  ChrootChecker() : II_chroot(nullptr), II_chdir(nullptr) {}
-
-  static void *getTag() {
-    static int x;
-    return &x;
-  }
-
-  bool evalCall(const CallExpr *CE, CheckerContext &C) const;
-  void checkPreStmt(const CallExpr *CE, CheckerContext &C) const;
-
-private:
-  void Chroot(CheckerContext &C, const CallExpr *CE) const;
-  void Chdir(CheckerContext &C, const CallExpr *CE) const;
-};
-
-} // end anonymous namespace
-
-bool ChrootChecker::evalCall(const CallExpr *CE, CheckerContext &C) const {
-  const FunctionDecl *FD = C.getCalleeDecl(CE);
-  if (!FD)
-    return false;
-
-  ASTContext &Ctx = C.getASTContext();
-  if (!II_chroot)
-    II_chroot = &Ctx.Idents.get("chroot");
-  if (!II_chdir)
-    II_chdir = &Ctx.Idents.get("chdir");
-
-  if (FD->getIdentifier() == II_chroot) {
-    Chroot(C, CE);
-    return true;
-  }
-  if (FD->getIdentifier() == II_chdir) {
-    Chdir(C, CE);
-    return true;
-  }
-
-  return false;
-}
-
-void ChrootChecker::Chroot(CheckerContext &C, const CallExpr *CE) const {
-  ProgramStateRef state = C.getState();
-  ProgramStateManager &Mgr = state->getStateManager();
-
-  // Once encouter a chroot(), set the enum value ROOT_CHANGED directly in
-  // the GDM.
-  state = Mgr.addGDM(state, ChrootChecker::getTag(), (void*) ROOT_CHANGED);
-  C.addTransition(state);
-}
-
-void ChrootChecker::Chdir(CheckerContext &C, const CallExpr *CE) const {
-  ProgramStateRef state = C.getState();
-  ProgramStateManager &Mgr = state->getStateManager();
-
-  // If there are no jail state in the GDM, just return.
-  const void *k = state->FindGDM(ChrootChecker::getTag());
-  if (!k)
-    return;
-
-  // After chdir("/"), enter the jail, set the enum value JAIL_ENTERED.
-  const Expr *ArgExpr = CE->getArg(0);
-  SVal ArgVal = C.getSVal(ArgExpr);
-
-  if (const MemRegion *R = ArgVal.getAsRegion()) {
-    R = R->StripCasts();
-    if (const StringRegion* StrRegion= dyn_cast<StringRegion>(R)) {
-      const StringLiteral* Str = StrRegion->getStringLiteral();
-      if (Str->getString() == "/")
-        state = Mgr.addGDM(state, ChrootChecker::getTag(),
-                           (void*) JAIL_ENTERED);
-    }
-  }
-
-  C.addTransition(state);
-}
-
-// Check the jail state before any function call except chroot and chdir().
-void ChrootChecker::checkPreStmt(const CallExpr *CE, CheckerContext &C) const {
-  const FunctionDecl *FD = C.getCalleeDecl(CE);
-  if (!FD)
-    return;
-
-  ASTContext &Ctx = C.getASTContext();
-  if (!II_chroot)
-    II_chroot = &Ctx.Idents.get("chroot");
-  if (!II_chdir)
-    II_chdir = &Ctx.Idents.get("chdir");
-
-  // Ignore chroot and chdir.
-  if (FD->getIdentifier() == II_chroot || FD->getIdentifier() == II_chdir)
-    return;
-
-  // If jail state is ROOT_CHANGED, generate BugReport.
-  void *const* k = C.getState()->FindGDM(ChrootChecker::getTag());
-  if (k)
-    if (isRootChanged((intptr_t) *k))
-      if (ExplodedNode *N = C.generateNonFatalErrorNode()) {
-        if (!BT_BreakJail)
-          BT_BreakJail.reset(new BuiltinBug(
-              this, "Break out of jail", "No call of chdir(\"/\") immediately "
-                                         "after chroot"));
-        C.emitReport(llvm::make_unique<BugReport>(
-            *BT_BreakJail, BT_BreakJail->getDescription(), N));
-      }
-}
-
-void ento::registerChrootChecker(CheckerManager &mgr) {
-  mgr.registerChecker<ChrootChecker>();
-}