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/*
* Copyright (C) 2015 Andrei Karas
*
* This file is part of AstDumper.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "analysis/expression.h"
#include "command.h"
#include "logger.h"
#include "analysis/analysis.h"
#include "analysis/walkitem.h"
#include "nodes/expr/addr_expr.h"
#include "nodes/expr/indirect_ref.h"
#include "nodes/expr/modify_expr.h"
#include "nodes/expr/pointerplus_expr.h"
#include <set>
#include "localconsts.h"
namespace Analysis
{
void analyseModifyExpr(ModifyExprNode *node, const WalkItem &wi, WalkItem &wo)
{
// need atleast one arg for check
if (node->args.empty() || command == FindArgs)
return;
Node *arg = node->args[0];
if (arg && arg->nodeType == INDIRECT_REF)
{
IndirectRefNode *refNode = static_cast<IndirectRefNode*>(arg);
// need atleast one arg for check
if (refNode->args.empty())
return;
arg = refNode->args[0];
if (arg->nodeType == PARM_DECL)
{
if (wi.checkNullVars.find(arg->label) != wi.checkNullVars.end())
{
Log::warn(findBackLocation(node),
"Using variable without check for NULL");
}
}
}
}
void analysePointerPlusExpr(PointerPlusExprNode *node, const WalkItem &wi, WalkItem &wo)
{
// need atleast one arg for check
if (node->args.empty() || command == FindArgs)
return;
Node *arg = node->args[0];
if (arg && arg->nodeType == PARM_DECL)
{
if (wi.checkNullVars.find(arg->label) != wi.checkNullVars.end())
{
Log::warn(findBackLocation(node),
"Using variable without check for NULL");
}
}
}
void analyseAddrExpr(AddrExprNode *node, const WalkItem &wi, WalkItem &wo)
{
// need atleast one arg for check
if (node->args.empty() || command == FindArgs)
return;
Node *arg = node->args[0];
if (arg && arg->nodeType == PARM_DECL)
{
if (wi.checkNullVars.find(arg->label) != wi.checkNullVars.end())
{
Log::warn(findBackLocation(node),
"Using variable without check for NULL");
}
}
}
}
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