зеркало из https://github.com/microsoft/clang-1.git
81 строка
2.5 KiB
C++
81 строка
2.5 KiB
C++
//=== NoReturnFunctionChecker.cpp -------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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//
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// This defines NoReturnFunctionChecker, which evaluates functions that do not
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// return to the caller.
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//
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//===----------------------------------------------------------------------===//
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#include "GRExprEngineInternalChecks.h"
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#include "clang/Analysis/PathSensitive/Checker.h"
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#include "llvm/ADT/StringSwitch.h"
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using namespace clang;
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namespace {
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class NoReturnFunctionChecker : public Checker {
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public:
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static void *getTag() { static int tag = 0; return &tag; }
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virtual bool EvalCallExpr(CheckerContext &C, const CallExpr *CE);
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};
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}
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void clang::RegisterNoReturnFunctionChecker(GRExprEngine &Eng) {
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Eng.registerCheck(new NoReturnFunctionChecker());
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}
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bool NoReturnFunctionChecker::EvalCallExpr(CheckerContext &C,
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const CallExpr *CE) {
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const GRState *state = C.getState();
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const Expr *Callee = CE->getCallee();
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SVal L = state->getSVal(Callee);
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const FunctionDecl *FD = L.getAsFunctionDecl();
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if (!FD)
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return false;
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bool BuildSinks = false;
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if (FD->getAttr<NoReturnAttr>() || FD->getAttr<AnalyzerNoReturnAttr>())
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BuildSinks = true;
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else {
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// HACK: Some functions are not marked noreturn, and don't return.
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// Here are a few hardwired ones. If this takes too long, we can
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// potentially cache these results.
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using llvm::StringRef;
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BuildSinks
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= llvm::StringSwitch<bool>(StringRef(FD->getIdentifier()->getName()))
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.Case("exit", true)
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.Case("panic", true)
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.Case("error", true)
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.Case("Assert", true)
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// FIXME: This is just a wrapper around throwing an exception.
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// Eventually inter-procedural analysis should handle this easily.
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.Case("ziperr", true)
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.Case("assfail", true)
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.Case("db_error", true)
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.Case("__assert", true)
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.Case("__assert_rtn", true)
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.Case("__assert_fail", true)
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.Case("dtrace_assfail", true)
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.Case("yy_fatal_error", true)
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.Case("_XCAssertionFailureHandler", true)
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.Case("_DTAssertionFailureHandler", true)
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.Case("_TSAssertionFailureHandler", true)
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.Default(false);
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}
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if (!BuildSinks)
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return false;
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C.GenerateSink(CE);
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return true;
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}
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