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Extract mark-no-return-function code into a function. 

llvm-svn: 80979
This commit is contained in:
Zhongxing Xu 2009-09-04 02:13:36 +00:00
parent 1eaa90b901
commit 1748d8a43d
1 changed files with 84 additions and 80 deletions
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164
clang/lib/Analysis/GRExprEngine.cpp
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@ -1417,6 +1417,88 @@ static bool EvalOSAtomic(ExplodedNodeSet& Dst,
//===----------------------------------------------------------------------===//
// Transfer function: Function calls.
//===----------------------------------------------------------------------===//
static void MarkNoReturnFunction(const FunctionDecl *FD, CallExpr *CE,
const GRState *state,
GRStmtNodeBuilder *Builder) {
if (FD->getAttr<NoReturnAttr>() ||
FD->getAttr<AnalyzerNoReturnAttr>())
Builder->BuildSinks = true;
else {
// HACK: Some functions are not marked noreturn, and don't return.
// Here are a few hardwired ones. If this takes too long, we can
// potentially cache these results.
const char* s = FD->getIdentifier()->getName();
unsigned n = strlen(s);
switch (n) {
default:
break;
case 4:
if (!memcmp(s, "exit", 4)) Builder->BuildSinks = true;
break;
case 5:
if (!memcmp(s, "panic", 5)) Builder->BuildSinks = true;
else if (!memcmp(s, "error", 5)) {
if (CE->getNumArgs() > 0) {
SVal X = state->getSVal(*CE->arg_begin());
// FIXME: use Assume to inspect the possible symbolic value of
// X. Also check the specific signature of error().
nonloc::ConcreteInt* CI = dyn_cast<nonloc::ConcreteInt>(&X);
if (CI && CI->getValue() != 0)
Builder->BuildSinks = true;
}
}
break;
case 6:
if (!memcmp(s, "Assert", 6)) {
Builder->BuildSinks = true;
break;
}
// FIXME: This is just a wrapper around throwing an exception.
// Eventually inter-procedural analysis should handle this easily.
if (!memcmp(s, "ziperr", 6)) Builder->BuildSinks = true;
break;
case 7:
if (!memcmp(s, "assfail", 7)) Builder->BuildSinks = true;
break;
case 8:
if (!memcmp(s ,"db_error", 8) ||
!memcmp(s, "__assert", 8))
Builder->BuildSinks = true;
break;
case 12:
if (!memcmp(s, "__assert_rtn", 12)) Builder->BuildSinks = true;
break;
case 13:
if (!memcmp(s, "__assert_fail", 13)) Builder->BuildSinks = true;
break;
case 14:
if (!memcmp(s, "dtrace_assfail", 14) ||
!memcmp(s, "yy_fatal_error", 14))
Builder->BuildSinks = true;
break;
case 26:
if (!memcmp(s, "_XCAssertionFailureHandler", 26) ||
!memcmp(s, "_DTAssertionFailureHandler", 26) ||
!memcmp(s, "_TSAssertionFailureHandler", 26))
Builder->BuildSinks = true;
break;
}
}
}
void GRExprEngine::EvalCall(ExplodedNodeSet& Dst, CallExpr* CE, SVal L,
ExplodedNode* Pred) {
@ -1498,86 +1580,8 @@ void GRExprEngine::VisitCallRec(CallExpr* CE, ExplodedNode* Pred,
SaveAndRestore<bool> OldSink(Builder->BuildSinks);
const FunctionDecl* FD = L.getAsFunctionDecl();
if (FD) {
if (FD->getAttr<NoReturnAttr>() ||
FD->getAttr<AnalyzerNoReturnAttr>())
Builder->BuildSinks = true;
else {
// HACK: Some functions are not marked noreturn, and don't return.
// Here are a few hardwired ones. If this takes too long, we can
// potentially cache these results.
const char* s = FD->getIdentifier()->getName();
unsigned n = strlen(s);
switch (n) {
default:
break;
case 4:
if (!memcmp(s, "exit", 4)) Builder->BuildSinks = true;
break;
case 5:
if (!memcmp(s, "panic", 5)) Builder->BuildSinks = true;
else if (!memcmp(s, "error", 5)) {
if (CE->getNumArgs() > 0) {
SVal X = state->getSVal(*CE->arg_begin());
// FIXME: use Assume to inspect the possible symbolic value of
// X. Also check the specific signature of error().
nonloc::ConcreteInt* CI = dyn_cast<nonloc::ConcreteInt>(&X);
if (CI && CI->getValue() != 0)
Builder->BuildSinks = true;
}
}
break;
case 6:
if (!memcmp(s, "Assert", 6)) {
Builder->BuildSinks = true;
break;
}
// FIXME: This is just a wrapper around throwing an exception.
// Eventually inter-procedural analysis should handle this easily.
if (!memcmp(s, "ziperr", 6)) Builder->BuildSinks = true;
break;
case 7:
if (!memcmp(s, "assfail", 7)) Builder->BuildSinks = true;
break;
case 8:
if (!memcmp(s ,"db_error", 8) ||
!memcmp(s, "__assert", 8))
Builder->BuildSinks = true;
break;
case 12:
if (!memcmp(s, "__assert_rtn", 12)) Builder->BuildSinks = true;
break;
case 13:
if (!memcmp(s, "__assert_fail", 13)) Builder->BuildSinks = true;
break;
case 14:
if (!memcmp(s, "dtrace_assfail", 14) ||
!memcmp(s, "yy_fatal_error", 14))
Builder->BuildSinks = true;
break;
case 26:
if (!memcmp(s, "_XCAssertionFailureHandler", 26) ||
!memcmp(s, "_DTAssertionFailureHandler", 26) ||
!memcmp(s, "_TSAssertionFailureHandler", 26))
Builder->BuildSinks = true;
break;
}
}
}
if (FD)
MarkNoReturnFunction(FD, CE, state, Builder);
// Evaluate the call.