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-rw-r--r--lib/StaticAnalyzer/Checkers/StreamChecker.cpp148
1 files changed, 72 insertions, 76 deletions
diff --git a/lib/StaticAnalyzer/Checkers/StreamChecker.cpp b/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
index 2655be2..d0626b8 100644
--- a/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/StreamChecker.cpp
@@ -12,9 +12,10 @@
//===----------------------------------------------------------------------===//
#include "ClangSACheckers.h"
+#include "clang/StaticAnalyzer/Core/CheckerV2.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
-#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerVisitor.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/GRState.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/GRStateTrait.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
@@ -55,52 +56,50 @@ struct StreamState {
}
};
-class StreamChecker : public CheckerVisitor<StreamChecker> {
- IdentifierInfo *II_fopen, *II_tmpfile, *II_fclose, *II_fread, *II_fwrite,
+class StreamChecker : public CheckerV2<eval::Call,
+ check::DeadSymbols,
+ check::EndPath,
+ check::PreStmt<ReturnStmt> > {
+ mutable IdentifierInfo *II_fopen, *II_tmpfile, *II_fclose, *II_fread,
+ *II_fwrite,
*II_fseek, *II_ftell, *II_rewind, *II_fgetpos, *II_fsetpos,
*II_clearerr, *II_feof, *II_ferror, *II_fileno;
- BuiltinBug *BT_nullfp, *BT_illegalwhence, *BT_doubleclose, *BT_ResourceLeak;
+ mutable llvm::OwningPtr<BuiltinBug> BT_nullfp, BT_illegalwhence,
+ BT_doubleclose, BT_ResourceLeak;
public:
StreamChecker()
: II_fopen(0), II_tmpfile(0) ,II_fclose(0), II_fread(0), II_fwrite(0),
II_fseek(0), II_ftell(0), II_rewind(0), II_fgetpos(0), II_fsetpos(0),
- II_clearerr(0), II_feof(0), II_ferror(0), II_fileno(0),
- BT_nullfp(0), BT_illegalwhence(0), BT_doubleclose(0),
- BT_ResourceLeak(0) {}
+ II_clearerr(0), II_feof(0), II_ferror(0), II_fileno(0) {}
- static void *getTag() {
- static int x;
- return &x;
- }
-
- virtual bool evalCallExpr(CheckerContext &C, const CallExpr *CE);
- void evalDeadSymbols(CheckerContext &C, SymbolReaper &SymReaper);
- void evalEndPath(EndOfFunctionNodeBuilder &B, void *tag, ExprEngine &Eng);
- void PreVisitReturnStmt(CheckerContext &C, const ReturnStmt *S);
+ bool evalCall(const CallExpr *CE, CheckerContext &C) const;
+ void checkDeadSymbols(SymbolReaper &SymReaper, CheckerContext &C) const;
+ void checkEndPath(EndOfFunctionNodeBuilder &B, ExprEngine &Eng) const;
+ void checkPreStmt(const ReturnStmt *S, CheckerContext &C) const;
private:
- void Fopen(CheckerContext &C, const CallExpr *CE);
- void Tmpfile(CheckerContext &C, const CallExpr *CE);
- void Fclose(CheckerContext &C, const CallExpr *CE);
- void Fread(CheckerContext &C, const CallExpr *CE);
- void Fwrite(CheckerContext &C, const CallExpr *CE);
- void Fseek(CheckerContext &C, const CallExpr *CE);
- void Ftell(CheckerContext &C, const CallExpr *CE);
- void Rewind(CheckerContext &C, const CallExpr *CE);
- void Fgetpos(CheckerContext &C, const CallExpr *CE);
- void Fsetpos(CheckerContext &C, const CallExpr *CE);
- void Clearerr(CheckerContext &C, const CallExpr *CE);
- void Feof(CheckerContext &C, const CallExpr *CE);
- void Ferror(CheckerContext &C, const CallExpr *CE);
- void Fileno(CheckerContext &C, const CallExpr *CE);
-
- void OpenFileAux(CheckerContext &C, const CallExpr *CE);
+ void Fopen(CheckerContext &C, const CallExpr *CE) const;
+ void Tmpfile(CheckerContext &C, const CallExpr *CE) const;
+ void Fclose(CheckerContext &C, const CallExpr *CE) const;
+ void Fread(CheckerContext &C, const CallExpr *CE) const;
+ void Fwrite(CheckerContext &C, const CallExpr *CE) const;
+ void Fseek(CheckerContext &C, const CallExpr *CE) const;
+ void Ftell(CheckerContext &C, const CallExpr *CE) const;
+ void Rewind(CheckerContext &C, const CallExpr *CE) const;
+ void Fgetpos(CheckerContext &C, const CallExpr *CE) const;
+ void Fsetpos(CheckerContext &C, const CallExpr *CE) const;
+ void Clearerr(CheckerContext &C, const CallExpr *CE) const;
+ void Feof(CheckerContext &C, const CallExpr *CE) const;
+ void Ferror(CheckerContext &C, const CallExpr *CE) const;
+ void Fileno(CheckerContext &C, const CallExpr *CE) const;
+
+ void OpenFileAux(CheckerContext &C, const CallExpr *CE) const;
const GRState *CheckNullStream(SVal SV, const GRState *state,
- CheckerContext &C);
+ CheckerContext &C) const;
const GRState *CheckDoubleClose(const CallExpr *CE, const GRState *state,
- CheckerContext &C);
+ CheckerContext &C) const;
};
} // end anonymous namespace
@@ -110,20 +109,12 @@ namespace ento {
template <>
struct GRStateTrait<StreamState>
: public GRStatePartialTrait<llvm::ImmutableMap<SymbolRef, StreamState> > {
- static void *GDMIndex() { return StreamChecker::getTag(); }
+ static void *GDMIndex() { static int x; return &x; }
};
}
}
-static void RegisterStreamChecker(ExprEngine &Eng) {
- Eng.registerCheck(new StreamChecker());
-}
-
-void ento::registerStreamChecker(CheckerManager &mgr) {
- mgr.addCheckerRegisterFunction(RegisterStreamChecker);
-}
-
-bool StreamChecker::evalCallExpr(CheckerContext &C, const CallExpr *CE) {
+bool StreamChecker::evalCall(const CallExpr *CE, CheckerContext &C) const {
const GRState *state = C.getState();
const Expr *Callee = CE->getCallee();
SVal L = state->getSVal(Callee);
@@ -221,15 +212,15 @@ bool StreamChecker::evalCallExpr(CheckerContext &C, const CallExpr *CE) {
return false;
}
-void StreamChecker::Fopen(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fopen(CheckerContext &C, const CallExpr *CE) const {
OpenFileAux(C, CE);
}
-void StreamChecker::Tmpfile(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Tmpfile(CheckerContext &C, const CallExpr *CE) const {
OpenFileAux(C, CE);
}
-void StreamChecker::OpenFileAux(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::OpenFileAux(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
unsigned Count = C.getNodeBuilder().getCurrentBlockCount();
SValBuilder &svalBuilder = C.getSValBuilder();
@@ -255,25 +246,25 @@ void StreamChecker::OpenFileAux(CheckerContext &C, const CallExpr *CE) {
}
}
-void StreamChecker::Fclose(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fclose(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = CheckDoubleClose(CE, C.getState(), C);
if (state)
C.addTransition(state);
}
-void StreamChecker::Fread(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fread(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(3)), state, C))
return;
}
-void StreamChecker::Fwrite(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fwrite(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(3)), state, C))
return;
}
-void StreamChecker::Fseek(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fseek(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!(state = CheckNullStream(state->getSVal(CE->getArg(0)), state, C)))
return;
@@ -290,65 +281,65 @@ void StreamChecker::Fseek(CheckerContext &C, const CallExpr *CE) {
if (ExplodedNode *N = C.generateNode(state)) {
if (!BT_illegalwhence)
- BT_illegalwhence = new BuiltinBug("Illegal whence argument",
+ BT_illegalwhence.reset(new BuiltinBug("Illegal whence argument",
"The whence argument to fseek() should be "
- "SEEK_SET, SEEK_END, or SEEK_CUR.");
+ "SEEK_SET, SEEK_END, or SEEK_CUR."));
BugReport *R = new BugReport(*BT_illegalwhence,
BT_illegalwhence->getDescription(), N);
C.EmitReport(R);
}
}
-void StreamChecker::Ftell(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Ftell(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Rewind(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Rewind(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Fgetpos(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fgetpos(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Fsetpos(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fsetpos(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Clearerr(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Clearerr(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Feof(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Feof(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Ferror(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Ferror(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
-void StreamChecker::Fileno(CheckerContext &C, const CallExpr *CE) {
+void StreamChecker::Fileno(CheckerContext &C, const CallExpr *CE) const {
const GRState *state = C.getState();
if (!CheckNullStream(state->getSVal(CE->getArg(0)), state, C))
return;
}
const GRState *StreamChecker::CheckNullStream(SVal SV, const GRState *state,
- CheckerContext &C) {
+ CheckerContext &C) const {
const DefinedSVal *DV = dyn_cast<DefinedSVal>(&SV);
if (!DV)
return 0;
@@ -360,8 +351,8 @@ const GRState *StreamChecker::CheckNullStream(SVal SV, const GRState *state,
if (!stateNotNull && stateNull) {
if (ExplodedNode *N = C.generateSink(stateNull)) {
if (!BT_nullfp)
- BT_nullfp = new BuiltinBug("NULL stream pointer",
- "Stream pointer might be NULL.");
+ BT_nullfp.reset(new BuiltinBug("NULL stream pointer",
+ "Stream pointer might be NULL."));
BugReport *R =new BugReport(*BT_nullfp, BT_nullfp->getDescription(), N);
C.EmitReport(R);
}
@@ -372,7 +363,7 @@ const GRState *StreamChecker::CheckNullStream(SVal SV, const GRState *state,
const GRState *StreamChecker::CheckDoubleClose(const CallExpr *CE,
const GRState *state,
- CheckerContext &C) {
+ CheckerContext &C) const {
SymbolRef Sym = state->getSVal(CE->getArg(0)).getAsSymbol();
if (!Sym)
return state;
@@ -389,9 +380,9 @@ const GRState *StreamChecker::CheckDoubleClose(const CallExpr *CE,
ExplodedNode *N = C.generateSink();
if (N) {
if (!BT_doubleclose)
- BT_doubleclose = new BuiltinBug("Double fclose",
+ BT_doubleclose.reset(new BuiltinBug("Double fclose",
"Try to close a file Descriptor already"
- " closed. Cause undefined behaviour.");
+ " closed. Cause undefined behaviour."));
BugReport *R = new BugReport(*BT_doubleclose,
BT_doubleclose->getDescription(), N);
C.EmitReport(R);
@@ -403,7 +394,8 @@ const GRState *StreamChecker::CheckDoubleClose(const CallExpr *CE,
return state->set<StreamState>(Sym, StreamState::getClosed(CE));
}
-void StreamChecker::evalDeadSymbols(CheckerContext &C,SymbolReaper &SymReaper) {
+void StreamChecker::checkDeadSymbols(SymbolReaper &SymReaper,
+ CheckerContext &C) const {
for (SymbolReaper::dead_iterator I = SymReaper.dead_begin(),
E = SymReaper.dead_end(); I != E; ++I) {
SymbolRef Sym = *I;
@@ -416,8 +408,8 @@ void StreamChecker::evalDeadSymbols(CheckerContext &C,SymbolReaper &SymReaper) {
ExplodedNode *N = C.generateSink();
if (N) {
if (!BT_ResourceLeak)
- BT_ResourceLeak = new BuiltinBug("Resource Leak",
- "Opened File never closed. Potential Resource leak.");
+ BT_ResourceLeak.reset(new BuiltinBug("Resource Leak",
+ "Opened File never closed. Potential Resource leak."));
BugReport *R = new BugReport(*BT_ResourceLeak,
BT_ResourceLeak->getDescription(), N);
C.EmitReport(R);
@@ -426,8 +418,8 @@ void StreamChecker::evalDeadSymbols(CheckerContext &C,SymbolReaper &SymReaper) {
}
}
-void StreamChecker::evalEndPath(EndOfFunctionNodeBuilder &B, void *tag,
- ExprEngine &Eng) {
+void StreamChecker::checkEndPath(EndOfFunctionNodeBuilder &B,
+ ExprEngine &Eng) const {
const GRState *state = B.getState();
typedef llvm::ImmutableMap<SymbolRef, StreamState> SymMap;
SymMap M = state->get<StreamState>();
@@ -435,11 +427,11 @@ void StreamChecker::evalEndPath(EndOfFunctionNodeBuilder &B, void *tag,
for (SymMap::iterator I = M.begin(), E = M.end(); I != E; ++I) {
StreamState SS = I->second;
if (SS.isOpened()) {
- ExplodedNode *N = B.generateNode(state, tag, B.getPredecessor());
+ ExplodedNode *N = B.generateNode(state);
if (N) {
if (!BT_ResourceLeak)
- BT_ResourceLeak = new BuiltinBug("Resource Leak",
- "Opened File never closed. Potential Resource leak.");
+ BT_ResourceLeak.reset(new BuiltinBug("Resource Leak",
+ "Opened File never closed. Potential Resource leak."));
BugReport *R = new BugReport(*BT_ResourceLeak,
BT_ResourceLeak->getDescription(), N);
Eng.getBugReporter().EmitReport(R);
@@ -448,7 +440,7 @@ void StreamChecker::evalEndPath(EndOfFunctionNodeBuilder &B, void *tag,
}
}
-void StreamChecker::PreVisitReturnStmt(CheckerContext &C, const ReturnStmt *S) {
+void StreamChecker::checkPreStmt(const ReturnStmt *S, CheckerContext &C) const {
const Expr *RetE = S->getRetValue();
if (!RetE)
return;
@@ -468,3 +460,7 @@ void StreamChecker::PreVisitReturnStmt(CheckerContext &C, const ReturnStmt *S) {
C.addTransition(state);
}
+
+void ento::registerStreamChecker(CheckerManager &mgr) {
+ mgr.registerChecker<StreamChecker>();
+}
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