1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/*
* Copyright (C) 2015 Andrei Karas
*
* This file is part of Paranoid null checker.
*
* 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/function.h"
#include "command.h"
#include "logger.h"
#include "analysis/analysis.h"
#include "analysis/walkitem.h"
#include "nodes/decl/function_decl.h"
#include "nodes/list/tree_list.h"
#include "nodes/type/method_type.h"
#include <set>
#include "localconsts.h"
namespace Analysis
{
// put arg types into arr
void getFunctionArgTypes(FunctionDeclNode *node,
std::vector<TypeNode*> &arr)
{
TreeListNode *types = nullptr;
if (node->functionType == FUNCTION_TYPE)
types = static_cast<FunctionTypeNode*>(node->functionType)->argTypes;
else if (node->functionType == METHOD_TYPE)
types = static_cast<MethodTypeNode*>(node->functionType)->argTypes;
else
return;
// walk in TREE_LIST and get value nodes
FOR_TREE_LIST2(list, types)
{
arr.push_back(static_cast<TypeNode*>(list->value));
}
}
bool findTreeListPurpose(TreeListNode *list,
const std::string &name)
{
FOR_TREE_LIST(list)
{
if (list->purpose && list->purpose->label == name)
{
return true;
}
}
return false;
}
// find in TREE_LIST purpose with given label and get value
TreeListNode *findTreeListPurposeValue(TreeListNode *list,
const std::string &name)
{
FOR_TREE_LIST(list)
{
if (list->purpose && list->purpose->label == name)
{
return static_cast<TreeListNode*>(list->value);
}
}
return nullptr;
}
TreeListNode *findFunctionDeclAttribute(FunctionDeclNode *node,
const std::string &name)
{
// function not have type
if (!node->functionType)
return nullptr;
return findTreeListPurposeValue(
static_cast<TreeListNode*>(node->functionType->attribute),
name);
}
void getFunctionParamsNonNullAttributes(FunctionDeclNode *node,
std::set<int> &arr)
{
// function not have type
if (!node->functionType)
return;
TreeListNode *list = findFunctionDeclAttribute(node, "nonnull");
// no attribute nonnull
if (!list)
return;
// get all labels from TREE_LIST and convert to int.
// tree based on constants for attribute nonnull
FOR_TREE_LIST(list)
{
if (list->value)
{
arr.insert(atoi(list->value->label.c_str()));
}
}
}
void getPossibleNullParameters(FunctionDeclNode *node, WalkItem &wi)
{
std::vector<TypeNode*> types;
std::set<int> nonNull;
getFunctionArgTypes(node, types);
getFunctionParamsNonNullAttributes(node, nonNull);
if (checkCommand(FindArgs))
Log::log("%s: ", node->label.c_str());
size_t sz = node->args.size();
if (types.size() < sz)
sz = types.size();
for (size_t f = 0; f < sz; f ++)
{
const TypeNode *const type = types[f];
if (!type || type != POINTER_TYPE)
continue;
const ParmDeclNode *const name = node->args[f];
if (f == 0 && name->label == "this")
continue;
if (isNotIn(f + 1, nonNull))
{
if (checkCommand(FindArgs))
{
Log::log("%s %s, ",
type->nodeTypeName.c_str(),
name->label.c_str());
}
wi.needCheckNullVars.insert(name->label);
}
else
{
wi.knownNonNullVars.insert(name->label);
}
wi.knownVars.insert(name->label);
}
if (checkCommand(FindArgs))
Log::log("\n");
}
void analyseFunction(FunctionDeclNode *node, const WalkItem &wi, WalkItem &wo)
{
// ignore external functions
if (node->isExternal)
{
wo.stopWalking = true;
return;
}
if (node->code)
{ // probably function definition
WalkItem wi2 = wi;
getPossibleNullParameters(node, wi2);
walkTree(node->code, wi2, wo);
}
wo.stopWalking = true;
}
}
|
