97 lines
2.7 KiB
C++
97 lines
2.7 KiB
C++
//===---- CheckerHelpers.cpp - Helper functions for checkers ----*- 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 several static functions for use in checkers.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerHelpers.h"
|
|
#include "clang/AST/Decl.h"
|
|
#include "clang/AST/Expr.h"
|
|
|
|
// Recursively find any substatements containing macros
|
|
bool clang::ento::containsMacro(const Stmt *S) {
|
|
if (S->getLocStart().isMacroID())
|
|
return true;
|
|
|
|
if (S->getLocEnd().isMacroID())
|
|
return true;
|
|
|
|
for (const Stmt *Child : S->children())
|
|
if (Child && containsMacro(Child))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Recursively find any substatements containing enum constants
|
|
bool clang::ento::containsEnum(const Stmt *S) {
|
|
const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S);
|
|
|
|
if (DR && isa<EnumConstantDecl>(DR->getDecl()))
|
|
return true;
|
|
|
|
for (const Stmt *Child : S->children())
|
|
if (Child && containsEnum(Child))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Recursively find any substatements containing static vars
|
|
bool clang::ento::containsStaticLocal(const Stmt *S) {
|
|
const DeclRefExpr *DR = dyn_cast<DeclRefExpr>(S);
|
|
|
|
if (DR)
|
|
if (const VarDecl *VD = dyn_cast<VarDecl>(DR->getDecl()))
|
|
if (VD->isStaticLocal())
|
|
return true;
|
|
|
|
for (const Stmt *Child : S->children())
|
|
if (Child && containsStaticLocal(Child))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Recursively find any substatements containing __builtin_offsetof
|
|
bool clang::ento::containsBuiltinOffsetOf(const Stmt *S) {
|
|
if (isa<OffsetOfExpr>(S))
|
|
return true;
|
|
|
|
for (const Stmt *Child : S->children())
|
|
if (Child && containsBuiltinOffsetOf(Child))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
// Extract lhs and rhs from assignment statement
|
|
std::pair<const clang::VarDecl *, const clang::Expr *>
|
|
clang::ento::parseAssignment(const Stmt *S) {
|
|
const VarDecl *VD = 0;
|
|
const Expr *RHS = 0;
|
|
|
|
if (auto Assign = dyn_cast_or_null<BinaryOperator>(S)) {
|
|
if (Assign->isAssignmentOp()) {
|
|
// Ordinary assignment
|
|
RHS = Assign->getRHS();
|
|
if (auto DE = dyn_cast_or_null<DeclRefExpr>(Assign->getLHS()))
|
|
VD = dyn_cast_or_null<VarDecl>(DE->getDecl());
|
|
}
|
|
} else if (auto PD = dyn_cast_or_null<DeclStmt>(S)) {
|
|
// Initialization
|
|
assert(PD->isSingleDecl() && "We process decls one by one");
|
|
VD = dyn_cast_or_null<VarDecl>(PD->getSingleDecl());
|
|
RHS = VD->getAnyInitializer();
|
|
}
|
|
|
|
return std::make_pair(VD, RHS);
|
|
}
|