head 1.1; branch 1.1.1; access; symbols netbsd-11-0-RC4:1.1.1.6 netbsd-11-0-RC3:1.1.1.6 netbsd-11-0-RC2:1.1.1.6 netbsd-11-0-RC1:1.1.1.6 perseant-exfatfs-base-20250801:1.1.1.6 netbsd-11:1.1.1.6.0.10 netbsd-11-base:1.1.1.6 netbsd-10-1-RELEASE:1.1.1.6 perseant-exfatfs-base-20240630:1.1.1.6 perseant-exfatfs:1.1.1.6.0.8 perseant-exfatfs-base:1.1.1.6 netbsd-8-3-RELEASE:1.1.1.4 netbsd-9-4-RELEASE:1.1.1.5 netbsd-10-0-RELEASE:1.1.1.6 netbsd-10-0-RC6:1.1.1.6 netbsd-10-0-RC5:1.1.1.6 netbsd-10-0-RC4:1.1.1.6 netbsd-10-0-RC3:1.1.1.6 netbsd-10-0-RC2:1.1.1.6 netbsd-10-0-RC1:1.1.1.6 netbsd-10:1.1.1.6.0.6 netbsd-10-base:1.1.1.6 netbsd-9-3-RELEASE:1.1.1.5 cjep_sun2x:1.1.1.6.0.4 cjep_sun2x-base:1.1.1.6 cjep_staticlib_x-base1:1.1.1.6 netbsd-9-2-RELEASE:1.1.1.5 cjep_staticlib_x:1.1.1.6.0.2 cjep_staticlib_x-base:1.1.1.6 netbsd-9-1-RELEASE:1.1.1.5 phil-wifi-20200421:1.1.1.6 phil-wifi-20200411:1.1.1.6 phil-wifi-20200406:1.1.1.6 netbsd-8-2-RELEASE:1.1.1.4 netbsd-9-0-RELEASE:1.1.1.5 netbsd-9-0-RC2:1.1.1.5 netbsd-9-0-RC1:1.1.1.5 netbsd-9:1.1.1.5.0.2 netbsd-9-base:1.1.1.5 phil-wifi-20190609:1.1.1.5 netbsd-8-1-RELEASE:1.1.1.4 netbsd-8-1-RC1:1.1.1.4 pgoyette-compat-merge-20190127:1.1.1.4.14.1 pgoyette-compat-20190127:1.1.1.5 pgoyette-compat-20190118:1.1.1.5 pgoyette-compat-1226:1.1.1.5 pgoyette-compat-1126:1.1.1.5 pgoyette-compat-1020:1.1.1.5 pgoyette-compat-0930:1.1.1.5 pgoyette-compat-0906:1.1.1.5 netbsd-7-2-RELEASE:1.1.1.3 pgoyette-compat-0728:1.1.1.5 clang-337282:1.1.1.5 netbsd-8-0-RELEASE:1.1.1.4 phil-wifi:1.1.1.4.0.16 phil-wifi-base:1.1.1.4 pgoyette-compat-0625:1.1.1.4 netbsd-8-0-RC2:1.1.1.4 pgoyette-compat-0521:1.1.1.4 pgoyette-compat-0502:1.1.1.4 pgoyette-compat-0422:1.1.1.4 netbsd-8-0-RC1:1.1.1.4 pgoyette-compat-0415:1.1.1.4 pgoyette-compat-0407:1.1.1.4 pgoyette-compat-0330:1.1.1.4 pgoyette-compat-0322:1.1.1.4 pgoyette-compat-0315:1.1.1.4 netbsd-7-1-2-RELEASE:1.1.1.3 pgoyette-compat:1.1.1.4.0.14 pgoyette-compat-base:1.1.1.4 netbsd-7-1-1-RELEASE:1.1.1.3 clang-319952:1.1.1.4 matt-nb8-mediatek:1.1.1.4.0.12 matt-nb8-mediatek-base:1.1.1.4 clang-309604:1.1.1.4 perseant-stdc-iso10646:1.1.1.4.0.10 perseant-stdc-iso10646-base:1.1.1.4 netbsd-8:1.1.1.4.0.8 netbsd-8-base:1.1.1.4 prg-localcount2-base3:1.1.1.4 prg-localcount2-base2:1.1.1.4 prg-localcount2-base1:1.1.1.4 prg-localcount2:1.1.1.4.0.6 prg-localcount2-base:1.1.1.4 pgoyette-localcount-20170426:1.1.1.4 bouyer-socketcan-base1:1.1.1.4 pgoyette-localcount-20170320:1.1.1.4 netbsd-7-1:1.1.1.3.0.10 netbsd-7-1-RELEASE:1.1.1.3 netbsd-7-1-RC2:1.1.1.3 clang-294123:1.1.1.4 netbsd-7-nhusb-base-20170116:1.1.1.3 bouyer-socketcan:1.1.1.4.0.4 bouyer-socketcan-base:1.1.1.4 clang-291444:1.1.1.4 pgoyette-localcount-20170107:1.1.1.4 netbsd-7-1-RC1:1.1.1.3 pgoyette-localcount-20161104:1.1.1.4 netbsd-7-0-2-RELEASE:1.1.1.3 localcount-20160914:1.1.1.4 netbsd-7-nhusb:1.1.1.3.0.8 netbsd-7-nhusb-base:1.1.1.3 clang-280599:1.1.1.4 pgoyette-localcount-20160806:1.1.1.4 pgoyette-localcount-20160726:1.1.1.4 pgoyette-localcount:1.1.1.4.0.2 pgoyette-localcount-base:1.1.1.4 netbsd-7-0-1-RELEASE:1.1.1.3 clang-261930:1.1.1.4 netbsd-7-0:1.1.1.3.0.6 netbsd-7-0-RELEASE:1.1.1.3 netbsd-7-0-RC3:1.1.1.3 netbsd-7-0-RC2:1.1.1.3 netbsd-7-0-RC1:1.1.1.3 clang-237755:1.1.1.3 clang-232565:1.1.1.3 clang-227398:1.1.1.3 tls-maxphys-base:1.1.1.3 tls-maxphys:1.1.1.3.0.4 netbsd-7:1.1.1.3.0.2 netbsd-7-base:1.1.1.3 clang-215315:1.1.1.3 clang-209886:1.1.1.3 yamt-pagecache:1.1.1.2.0.4 yamt-pagecache-base9:1.1.1.2 tls-earlyentropy:1.1.1.2.0.2 tls-earlyentropy-base:1.1.1.3 riastradh-xf86-video-intel-2-7-1-pre-2-21-15:1.1.1.2 riastradh-drm2-base3:1.1.1.2 clang-202566:1.1.1.2 clang-201163:1.1.1.1 clang-199312:1.1.1.1 clang-198450:1.1.1.1 clang-196603:1.1.1.1 clang-195771:1.1.1.1 LLVM:1.1.1; locks; strict; comment @// @; 1.1 date 2013.11.28.14.14.52; author joerg; state Exp; branches 1.1.1.1; next ; commitid ow8OybrawrB1f3fx; 1.1.1.1 date 2013.11.28.14.14.52; author joerg; state Exp; branches; next 1.1.1.2; commitid ow8OybrawrB1f3fx; 1.1.1.2 date 2014.03.04.19.55.00; author joerg; state Exp; branches 1.1.1.2.2.1 1.1.1.2.4.1; next 1.1.1.3; commitid 29z1hJonZISIXprx; 1.1.1.3 date 2014.05.30.18.14.44; author joerg; state Exp; branches 1.1.1.3.4.1; next 1.1.1.4; commitid 8q0kdlBlCn09GACx; 1.1.1.4 date 2016.02.27.22.12.06; author joerg; state Exp; branches 1.1.1.4.14.1 1.1.1.4.16.1; next 1.1.1.5; commitid tIimz3oDlh1NpBWy; 1.1.1.5 date 2018.07.17.18.31.08; author joerg; state Exp; branches; next 1.1.1.6; commitid wDzL46ALjrCZgwKA; 1.1.1.6 date 2019.11.13.22.19.28; author joerg; state dead; branches; next ; commitid QD8YATxuNG34YJKB; 1.1.1.2.2.1 date 2014.08.10.07.08.10; author tls; state Exp; branches; next ; commitid t01A1TLTYxkpGMLx; 1.1.1.2.4.1 date 2014.03.04.19.55.00; author yamt; state dead; branches; next 1.1.1.2.4.2; commitid WSrDtL5nYAUyiyBx; 1.1.1.2.4.2 date 2014.05.22.16.18.31; author yamt; state Exp; branches; next ; commitid WSrDtL5nYAUyiyBx; 1.1.1.3.4.1 date 2014.05.30.18.14.44; author tls; state dead; branches; next 1.1.1.3.4.2; commitid jTnpym9Qu0o4R1Nx; 1.1.1.3.4.2 date 2014.08.19.23.47.31; author tls; state Exp; branches; next ; commitid jTnpym9Qu0o4R1Nx; 1.1.1.4.14.1 date 2018.07.28.04.33.23; author pgoyette; state Exp; branches; next ; commitid 1UP1xAIUxv1ZgRLA; 1.1.1.4.16.1 date 2019.06.10.21.45.28; author christos; state Exp; branches; next 1.1.1.4.16.2; commitid jtc8rnCzWiEEHGqB; 1.1.1.4.16.2 date 2020.04.13.07.46.38; author martin; state dead; branches; next ; commitid X01YhRUPVUDaec4C; desc @@ 1.1 log @Initial revision @ text @//== DivZeroChecker.cpp - Division by zero checker --------------*- C++ -*--==// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This defines DivZeroChecker, a builtin check in ExprEngine that performs // checks for division by zeros. // //===----------------------------------------------------------------------===// #include "ClangSACheckers.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 DivZeroChecker : public Checker< check::PreStmt > { mutable OwningPtr BT; void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const ; public: void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const; }; } // end anonymous namespace void DivZeroChecker::reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const { if (ExplodedNode *N = C.generateSink(StateZero)) { if (!BT) BT.reset(new BuiltinBug("Division by zero")); BugReport *R = new BugReport(*BT, Msg, N); bugreporter::trackNullOrUndefValue(N, bugreporter::GetDenomExpr(N), *R); C.emitReport(R); } } void DivZeroChecker::checkPreStmt(const BinaryOperator *B, CheckerContext &C) const { BinaryOperator::Opcode Op = B->getOpcode(); if (Op != BO_Div && Op != BO_Rem && Op != BO_DivAssign && Op != BO_RemAssign) return; if (!B->getRHS()->getType()->isScalarType()) return; SVal Denom = C.getState()->getSVal(B->getRHS(), C.getLocationContext()); Optional DV = Denom.getAs(); // Divide-by-undefined handled in the generic checking for uses of // undefined values. if (!DV) return; // Check for divide by zero. ConstraintManager &CM = C.getConstraintManager(); ProgramStateRef stateNotZero, stateZero; llvm::tie(stateNotZero, stateZero) = CM.assumeDual(C.getState(), *DV); if (!stateNotZero) { assert(stateZero); reportBug("Division by zero", stateZero, C); return; } bool TaintedD = C.getState()->isTainted(*DV); if ((stateNotZero && stateZero && TaintedD)) { reportBug("Division by a tainted value, possibly zero", stateZero, C); return; } // If we get here, then the denom should not be zero. We abandon the implicit // zero denom case for now. C.addTransition(stateNotZero); } void ento::registerDivZeroChecker(CheckerManager &mgr) { mgr.registerChecker(); } @ 1.1.1.1 log @Import Clang 3.4rc1 r195771. @ text @@ 1.1.1.2 log @Import Clang 3.5svn r202566. @ text @d40 1 a40 1 BT.reset(new BuiltinBug(this, "Division by zero")); @ 1.1.1.2.2.1 log @Rebase. @ text @d26 1 a26 1 mutable std::unique_ptr BT; d71 1 a71 1 std::tie(stateNotZero, stateZero) = CM.assumeDual(C.getState(), *DV); @ 1.1.1.3 log @Import Clang 3.5svn r209886. @ text @d26 1 a26 1 mutable std::unique_ptr BT; d71 1 a71 1 std::tie(stateNotZero, stateZero) = CM.assumeDual(C.getState(), *DV); @ 1.1.1.4 log @Import Clang 3.8.0rc3 r261930. @ text @d32 1 a32 1 }; d38 1 a38 1 if (ExplodedNode *N = C.generateErrorNode(StateZero)) { d42 1 a42 1 auto R = llvm::make_unique(*BT, Msg, N); d44 1 a44 1 C.emitReport(std::move(R)); @ 1.1.1.4.16.1 log @Sync with HEAD @ text @d27 3 a29 3 void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor = nullptr) const; d35 3 a37 3 void DivZeroChecker::reportBug( const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor) const { a42 1 R->addVisitor(std::move(Visitor)); d60 1 a60 1 SVal Denom = C.getSVal(B->getRHS()); d81 1 a81 2 reportBug("Division by a tainted value, possibly zero", stateZero, C, llvm::make_unique(*DV)); @ 1.1.1.4.16.2 log @Mostly merge changes from HEAD upto 20200411 @ text @@ 1.1.1.4.14.1 log @Sync with HEAD @ text @d27 3 a29 3 void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor = nullptr) const; d35 3 a37 3 void DivZeroChecker::reportBug( const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor) const { a42 1 R->addVisitor(std::move(Visitor)); d60 1 a60 1 SVal Denom = C.getSVal(B->getRHS()); d81 1 a81 2 reportBug("Division by a tainted value, possibly zero", stateZero, C, llvm::make_unique(*DV)); @ 1.1.1.5 log @Import clang r337282 from trunk @ text @d27 3 a29 3 void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor = nullptr) const; d35 3 a37 3 void DivZeroChecker::reportBug( const char *Msg, ProgramStateRef StateZero, CheckerContext &C, std::unique_ptr Visitor) const { a42 1 R->addVisitor(std::move(Visitor)); d60 1 a60 1 SVal Denom = C.getSVal(B->getRHS()); d81 1 a81 2 reportBug("Division by a tainted value, possibly zero", stateZero, C, llvm::make_unique(*DV)); @ 1.1.1.6 log @Mark old LLVM instance as dead. @ text @@ 1.1.1.3.4.1 log @file DivZeroChecker.cpp was added on branch tls-maxphys on 2014-08-19 23:47:31 +0000 @ text @d1 92 @ 1.1.1.3.4.2 log @Rebase to HEAD as of a few days ago. @ text @a0 92 //== DivZeroChecker.cpp - Division by zero checker --------------*- C++ -*--==// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This defines DivZeroChecker, a builtin check in ExprEngine that performs // checks for division by zeros. // //===----------------------------------------------------------------------===// #include "ClangSACheckers.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 DivZeroChecker : public Checker< check::PreStmt > { mutable std::unique_ptr BT; void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const ; public: void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const; }; } // end anonymous namespace void DivZeroChecker::reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const { if (ExplodedNode *N = C.generateSink(StateZero)) { if (!BT) BT.reset(new BuiltinBug(this, "Division by zero")); BugReport *R = new BugReport(*BT, Msg, N); bugreporter::trackNullOrUndefValue(N, bugreporter::GetDenomExpr(N), *R); C.emitReport(R); } } void DivZeroChecker::checkPreStmt(const BinaryOperator *B, CheckerContext &C) const { BinaryOperator::Opcode Op = B->getOpcode(); if (Op != BO_Div && Op != BO_Rem && Op != BO_DivAssign && Op != BO_RemAssign) return; if (!B->getRHS()->getType()->isScalarType()) return; SVal Denom = C.getState()->getSVal(B->getRHS(), C.getLocationContext()); Optional DV = Denom.getAs(); // Divide-by-undefined handled in the generic checking for uses of // undefined values. if (!DV) return; // Check for divide by zero. ConstraintManager &CM = C.getConstraintManager(); ProgramStateRef stateNotZero, stateZero; std::tie(stateNotZero, stateZero) = CM.assumeDual(C.getState(), *DV); if (!stateNotZero) { assert(stateZero); reportBug("Division by zero", stateZero, C); return; } bool TaintedD = C.getState()->isTainted(*DV); if ((stateNotZero && stateZero && TaintedD)) { reportBug("Division by a tainted value, possibly zero", stateZero, C); return; } // If we get here, then the denom should not be zero. We abandon the implicit // zero denom case for now. C.addTransition(stateNotZero); } void ento::registerDivZeroChecker(CheckerManager &mgr) { mgr.registerChecker(); } @ 1.1.1.2.4.1 log @file DivZeroChecker.cpp was added on branch yamt-pagecache on 2014-05-22 16:18:31 +0000 @ text @d1 92 @ 1.1.1.2.4.2 log @sync with head. for a reference, the tree before this commit was tagged as yamt-pagecache-tag8. this commit was splitted into small chunks to avoid a limitation of cvs. ("Protocol error: too many arguments") @ text @a0 92 //== DivZeroChecker.cpp - Division by zero checker --------------*- C++ -*--==// // // The LLVM Compiler Infrastructure // // This file is distributed under the University of Illinois Open Source // License. See LICENSE.TXT for details. // //===----------------------------------------------------------------------===// // // This defines DivZeroChecker, a builtin check in ExprEngine that performs // checks for division by zeros. // //===----------------------------------------------------------------------===// #include "ClangSACheckers.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 DivZeroChecker : public Checker< check::PreStmt > { mutable OwningPtr BT; void reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const ; public: void checkPreStmt(const BinaryOperator *B, CheckerContext &C) const; }; } // end anonymous namespace void DivZeroChecker::reportBug(const char *Msg, ProgramStateRef StateZero, CheckerContext &C) const { if (ExplodedNode *N = C.generateSink(StateZero)) { if (!BT) BT.reset(new BuiltinBug(this, "Division by zero")); BugReport *R = new BugReport(*BT, Msg, N); bugreporter::trackNullOrUndefValue(N, bugreporter::GetDenomExpr(N), *R); C.emitReport(R); } } void DivZeroChecker::checkPreStmt(const BinaryOperator *B, CheckerContext &C) const { BinaryOperator::Opcode Op = B->getOpcode(); if (Op != BO_Div && Op != BO_Rem && Op != BO_DivAssign && Op != BO_RemAssign) return; if (!B->getRHS()->getType()->isScalarType()) return; SVal Denom = C.getState()->getSVal(B->getRHS(), C.getLocationContext()); Optional DV = Denom.getAs(); // Divide-by-undefined handled in the generic checking for uses of // undefined values. if (!DV) return; // Check for divide by zero. ConstraintManager &CM = C.getConstraintManager(); ProgramStateRef stateNotZero, stateZero; llvm::tie(stateNotZero, stateZero) = CM.assumeDual(C.getState(), *DV); if (!stateNotZero) { assert(stateZero); reportBug("Division by zero", stateZero, C); return; } bool TaintedD = C.getState()->isTainted(*DV); if ((stateNotZero && stateZero && TaintedD)) { reportBug("Division by a tainted value, possibly zero", stateZero, C); return; } // If we get here, then the denom should not be zero. We abandon the implicit // zero denom case for now. C.addTransition(stateNotZero); } void ento::registerDivZeroChecker(CheckerManager &mgr) { mgr.registerChecker(); } @