Bug Summary

File:builds/wireshark/wireshark/ui/qt/simple_statistics_dialog.cpp
Warning:line 203, column 85
Potential leak of memory pointed to by 'ss_ti'

Annotated Source Code

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clang -cc1 -cc1 -triple x86_64-pc-linux-gnu -analyze -disable-free -clear-ast-before-backend -disable-llvm-verifier -discard-value-names -main-file-name simple_statistics_dialog.cpp -analyzer-checker=core -analyzer-checker=apiModeling -analyzer-checker=unix -analyzer-checker=deadcode -analyzer-checker=cplusplus -analyzer-checker=security.insecureAPI.UncheckedReturn -analyzer-checker=security.insecureAPI.getpw -analyzer-checker=security.insecureAPI.gets -analyzer-checker=security.insecureAPI.mktemp -analyzer-checker=security.insecureAPI.mkstemp -analyzer-checker=security.insecureAPI.vfork -analyzer-checker=nullability.NullPassedToNonnull -analyzer-checker=nullability.NullReturnedFromNonnull -analyzer-output plist -w -setup-static-analyzer -mrelocation-model pic -pic-level 2 -fhalf-no-semantic-interposition -fno-delete-null-pointer-checks -mframe-pointer=all -relaxed-aliasing -fmath-errno -ffp-contract=on -fno-rounding-math -ffloat16-excess-precision=fast -fbfloat16-excess-precision=fast -mconstructor-aliases -funwind-tables=2 -target-cpu x86-64 -tune-cpu generic -debugger-tuning=gdb -fdebug-compilation-dir=/builds/wireshark/wireshark/build -fcoverage-compilation-dir=/builds/wireshark/wireshark/build -resource-dir /usr/lib/llvm-18/lib/clang/18 -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/build/ui/qt -isystem /builds/wireshark/wireshark/ui/qt -isystem /usr/include/x86_64-linux-gnu/qt6/QtWidgets -isystem /usr/include/x86_64-linux-gnu/qt6 -isystem /usr/include/x86_64-linux-gnu/qt6/QtCore -isystem /usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -isystem /usr/include/x86_64-linux-gnu/qt6/QtGui -isystem /usr/include/x86_64-linux-gnu/qt6/QtCore5Compat -isystem /usr/include/x86_64-linux-gnu/qt6/QtConcurrent -isystem /usr/include/x86_64-linux-gnu/qt6/QtPrintSupport -isystem /usr/include/x86_64-linux-gnu/qt6/QtMultimedia -isystem /usr/include/x86_64-linux-gnu/qt6/QtNetwork -isystem /usr/include/x86_64-linux-gnu/qt6/QtDBus -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D QT_CONCURRENT_LIB -D QT_CORE5COMPAT_LIB -D QT_CORE_LIB -D QT_DBUS_LIB -D QT_GUI_LIB -D QT_MULTIMEDIA_LIB -D QT_NETWORK_LIB -D QT_PRINTSUPPORT_LIB -D QT_WIDGETS_LIB -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build/ui/qt/qtui_autogen/include -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -D _GLIBCXX_ASSERTIONS -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/x86_64-linux-gnu/c++/14 -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../include/c++/14/backward -internal-isystem /usr/lib/llvm-18/lib/clang/18/include -internal-isystem /usr/local/include -internal-isystem /usr/lib/gcc/x86_64-linux-gnu/14/../../../../x86_64-linux-gnu/include -internal-externc-isystem /usr/include/x86_64-linux-gnu -internal-externc-isystem /include -internal-externc-isystem /usr/include -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -Wno-format-truncation -Wno-format-nonliteral -std=c++17 -fdeprecated-macro -ferror-limit 19 -fwrapv -fstrict-flex-arrays=3 -stack-protector 2 -fstack-clash-protection -fcf-protection=full -fgnuc-version=4.2.1 -fskip-odr-check-in-gmf -fcxx-exceptions -fexceptions -fcolor-diagnostics -analyzer-output=html -dwarf-debug-flags /usr/lib/llvm-18/bin/clang --driver-mode=g++ -### --analyze -x c++ -D G_DISABLE_DEPRECATED -D G_DISABLE_SINGLE_INCLUDES -D QT_CONCURRENT_LIB -D QT_CORE5COMPAT_LIB -D QT_CORE_LIB -D QT_DBUS_LIB -D QT_GUI_LIB -D QT_MULTIMEDIA_LIB -D QT_NETWORK_LIB -D QT_PRINTSUPPORT_LIB -D QT_WIDGETS_LIB -D WS_DEBUG -D WS_DEBUG_UTF_8 -I /builds/wireshark/wireshark/build/ui/qt/qtui_autogen/include -I /builds/wireshark/wireshark/build -I /builds/wireshark/wireshark -I /builds/wireshark/wireshark/include -isystem /usr/include/glib-2.0 -isystem /usr/lib/x86_64-linux-gnu/glib-2.0/include -isystem /builds/wireshark/wireshark/build/ui/qt -isystem /builds/wireshark/wireshark/ui/qt -isystem /usr/include/x86_64-linux-gnu/qt6/QtWidgets -isystem /usr/include/x86_64-linux-gnu/qt6 -isystem /usr/include/x86_64-linux-gnu/qt6/QtCore -isystem /usr/lib/x86_64-linux-gnu/qt6/mkspecs/linux-g++ -isystem /usr/include/x86_64-linux-gnu/qt6/QtGui -isystem /usr/include/x86_64-linux-gnu/qt6/QtCore5Compat -isystem /usr/include/x86_64-linux-gnu/qt6/QtConcurrent -isystem /usr/include/x86_64-linux-gnu/qt6/QtPrintSupport -isystem /usr/include/x86_64-linux-gnu/qt6/QtMultimedia -isystem /usr/include/x86_64-linux-gnu/qt6/QtNetwork -isystem /usr/include/x86_64-linux-gnu/qt6/QtDBus -fexcess-precision=fast -fstrict-flex-arrays=3 -fstack-clash-protection -fcf-protection=full -D _GLIBCXX_ASSERTIONS -fstack-protector-strong -fno-delete-null-pointer-checks -fno-strict-overflow -fno-strict-aliasing -fexceptions -Wno-format-truncation -Wno-format-nonliteral -fdiagnostics-color=always -fmacro-prefix-map=/builds/wireshark/wireshark/= -fmacro-prefix-map=/builds/wireshark/wireshark/build/= -fmacro-prefix-map=../= -std=c++17 -fPIC -fPIC /builds/wireshark/wireshark/ui/qt/simple_statistics_dialog.cpp -o /builds/wireshark/wireshark/sbout/2024-12-03-100307-3935-1 -Xclang -analyzer-output=html -faddrsig -D__GCC_HAVE_DWARF2_CFI_ASM=1 -o /builds/wireshark/wireshark/sbout/2024-12-03-100307-3935-1 -x c++ /builds/wireshark/wireshark/ui/qt/simple_statistics_dialog.cpp
1/* simple_statistics_dialog.cpp
2 *
3 * Wireshark - Network traffic analyzer
4 * By Gerald Combs <[email protected]>
5 * Copyright 1998 Gerald Combs
6 *
7 * SPDX-License-Identifier: GPL-2.0-or-later
8 */
9
10#include "simple_statistics_dialog.h"
11
12#include "file.h"
13
14#include "epan/stat_tap_ui.h"
15
16#include <QTreeWidget>
17
18#include "main_application.h"
19
20// To do:
21// - Hide rows with zero counts.
22
23static QHash<const QString, stat_tap_table_ui *> cfg_str_to_stu_;
24
25extern "C" {
26static void
27simple_stat_init(const char *args, void*) {
28 QStringList args_l = QString(args).split(',');
29 if (args_l.length() > 1) {
30 QString simple_stat = QStringLiteral("%1,%2")(QString(QtPrivate::qMakeStringPrivate(u"" "%1,%2"))).arg(args_l[0]).arg(args_l[1]);
31 QString filter;
32 if (args_l.length() > 2) {
33 filter = QStringList(args_l.mid(2)).join(",");
34 }
35 mainApp->emitTapParameterSignal(simple_stat, filter, NULL__null);
36 }
37}
38}
39
40bool register_simple_stat_tables(const void *key, void *value, void*) {
41 stat_tap_table_ui *stu = (stat_tap_table_ui*)value;
42
43 cfg_str_to_stu_[stu->cli_string] = stu;
44 TapParameterDialog::registerDialog(
45 stu->title,
46 (const char*)key,
47 stu->group,
48 simple_stat_init,
49 SimpleStatisticsDialog::createSimpleStatisticsDialog);
50 return false;
51}
52
53enum {
54 simple_row_type_ = 1000
55};
56
57class SimpleStatisticsTreeWidgetItem : public QTreeWidgetItem
58{
59public:
60 SimpleStatisticsTreeWidgetItem(QTreeWidgetItem *parent, int num_fields, const stat_tap_table_item_type *fields) :
61 QTreeWidgetItem (parent, simple_row_type_),
62 num_fields_(num_fields),
63 fields_(fields)
64 {
65 }
66 void draw() {
67 for (int i = 0; i < num_fields_ && i < treeWidget()->columnCount(); i++) {
68 switch (fields_[i].type) {
69 case TABLE_ITEM_UINT:
70 setText(i, QString::number(fields_[i].value.uint_value));
71 break;
72 case TABLE_ITEM_INT:
73 setText(i, QString::number(fields_[i].value.int_value));
74 break;
75 case TABLE_ITEM_STRING:
76 setText(i, fields_[i].value.string_value);
77 break;
78 case TABLE_ITEM_FLOAT:
79 setText(i, QString::number(fields_[i].value.float_value, 'f', 6));
80 break;
81 case TABLE_ITEM_ENUM:
82 setText(i, QString::number(fields_[i].value.enum_value));
83 break;
84 default:
85 break;
86 }
87 }
88 }
89 bool operator< (const QTreeWidgetItem &other) const
90 {
91 int col = treeWidget()->sortColumn();
92 if (other.type() != simple_row_type_ || col >= num_fields_) {
93 return QTreeWidgetItem::operator< (other);
94 }
95 const SimpleStatisticsTreeWidgetItem *other_row = static_cast<const SimpleStatisticsTreeWidgetItem *>(&other);
96 switch (fields_[col].type) {
97 case TABLE_ITEM_UINT:
98 return fields_[col].value.uint_value < other_row->fields_[col].value.uint_value;
99 case TABLE_ITEM_INT:
100 return fields_[col].value.int_value < other_row->fields_[col].value.int_value;
101 case TABLE_ITEM_STRING:
102 return g_strcmp0(fields_[col].value.string_value, other_row->fields_[col].value.string_value) < 0;
103 case TABLE_ITEM_FLOAT:
104 return fields_[col].value.float_value < other_row->fields_[col].value.float_value;
105 case TABLE_ITEM_ENUM:
106 return fields_[col].value.enum_value < other_row->fields_[col].value.enum_value;
107 default:
108 break;
109 }
110
111 return QTreeWidgetItem::operator< (other);
112 }
113 QList<QVariant> rowData() {
114 QList<QVariant> row_data;
115
116 for (int i = 0; i < num_fields_ && i < columnCount(); i++) {
117 switch (fields_[i].type) {
118 case TABLE_ITEM_UINT:
119 row_data << fields_[i].value.uint_value;
120 break;
121 case TABLE_ITEM_INT:
122 row_data << fields_[i].value.int_value;
123 break;
124 case TABLE_ITEM_STRING:
125 row_data << fields_[i].value.string_value;
126 break;
127 case TABLE_ITEM_FLOAT:
128 row_data << fields_[i].value.float_value;
129 break;
130 case TABLE_ITEM_ENUM:
131 row_data << fields_[i].value.enum_value;
132 break;
133 default:
134 break;
135 }
136 }
137
138 return row_data;
139 }
140
141private:
142 const int num_fields_;
143 const stat_tap_table_item_type *fields_;
144};
145
146SimpleStatisticsDialog::SimpleStatisticsDialog(QWidget &parent, CaptureFile &cf, struct _stat_tap_table_ui *stu, const QString filter, int help_topic) :
147 TapParameterDialog(parent, cf, help_topic),
148 stu_(stu)
149{
150 stu->refcount++;
151 setWindowSubtitle(stu_->title);
152 loadGeometry(0, 0, stu_->title);
153
154 QStringList header_labels;
155 for (int col = 0; col < (int) stu_->nfields; col++) {
156 header_labels << stu_->fields[col].column_name;
157 }
158 statsTreeWidget()->setHeaderLabels(header_labels);
159
160 for (int col = 0; col < (int) stu_->nfields; col++) {
161 if (stu_->fields[col].align == TAP_ALIGN_RIGHT) {
162 statsTreeWidget()->headerItem()->setTextAlignment(col, Qt::AlignRight);
163 }
164 }
165
166 setDisplayFilter(filter);
167}
168
169TapParameterDialog *SimpleStatisticsDialog::createSimpleStatisticsDialog(QWidget &parent, const QString cfg_str, const QString filter, CaptureFile &cf)
170{
171 if (!cfg_str_to_stu_.contains(cfg_str)) {
172 // XXX MessageBox?
173 return NULL__null;
174 }
175
176 stat_tap_table_ui *stu = cfg_str_to_stu_[cfg_str];
177
178 return new SimpleStatisticsDialog(parent, cf, stu, filter);
179}
180
181void SimpleStatisticsDialog::addMissingRows(struct _stat_data_t *stat_data)
182{
183 // Hierarchy:
184 // - tables (GTK+ UI only supports one currently)
185 // - elements (rows?)
186 // - fields (columns?)
187 // For multiple table support we might want to add them as subtrees, with
188 // the top-level tree item text set to the column labels for that table.
189
190 // Add any missing tables and rows.
191 for (unsigned table_idx = 0; table_idx < stat_data->stat_tap_data->tables->len; table_idx++) {
9
←
Assuming 'table_idx' is < field 'len'
→
10
←
Loop condition is true. Entering loop body
→
192 stat_tap_table* st_table = g_array_index(stat_data->stat_tap_data->tables, stat_tap_table*, table_idx)(((stat_tap_table**) (void *) (stat_data->stat_tap_data->
tables)->data) [(table_idx)]);
193 QTreeWidgetItem *ti = NULL__null;
194
195 if ((int) table_idx >= statsTreeWidget()->topLevelItemCount()) {
11
←
Assuming the condition is false
→
12
←
Taking false branch
→
196 ti = new QTreeWidgetItem(statsTreeWidget());
197 ti->setText(0, st_table->title);
198 ti->setFirstColumnSpanned(true);
199 ti->setExpanded(true);
200 } else {
201 ti = statsTreeWidget()->topLevelItem(table_idx);
202 }
203 for (unsigned element = ti->childCount(); element < st_table->num_elements; element++) {
13
←
Assuming 'element' is < field 'num_elements'
→
14
←
Loop condition is true. Entering loop body
→
23
←
Potential leak of memory pointed to by 'ss_ti'
204 stat_tap_table_item_type* fields = stat_tap_get_field_data(st_table, element, 0);
205 if (stu_->nfields > 0) {
15
←
Assuming field 'nfields' is > 0
→
16
←
Taking true branch
→
206 SimpleStatisticsTreeWidgetItem *ss_ti = new SimpleStatisticsTreeWidgetItem(ti, st_table->num_fields, fields);
17
←
Memory is allocated
→
207 for (int col = 0; col
17.1
'col' is < field 'nfields'
 < (int) stu_->nfields; col++) {
18
←
Loop condition is true. Entering loop body
→
21
←
Assuming 'col' is >= field 'nfields'
→
22
←
Loop condition is false. Execution continues on line 203
→
208 if (stu_->fields[col].align == TAP_ALIGN_RIGHT) {
19
←
Assuming field 'align' is not equal to TAP_ALIGN_RIGHT
→
20
←
Taking false branch
→
209 ss_ti->setTextAlignment(col, Qt::AlignRight);
210 }
211 }
212 }
213 }
214 }
215}
216
217void SimpleStatisticsDialog::tapReset(void *sd_ptr)
218{
219 stat_data_t *sd = (stat_data_t*) sd_ptr;
220 SimpleStatisticsDialog *ss_dlg = static_cast<SimpleStatisticsDialog *>(sd->user_data);
221 if (!ss_dlg) return;
222
223 reset_stat_table(sd->stat_tap_data);
224 ss_dlg->statsTreeWidget()->clear();
225}
226
227void SimpleStatisticsDialog::tapDraw(void *sd_ptr)
228{
229 stat_data_t *sd = (stat_data_t*) sd_ptr;
230 SimpleStatisticsDialog *ss_dlg = static_cast<SimpleStatisticsDialog *>(sd->user_data);
231 if (!ss_dlg) return;
6
←
Assuming 'ss_dlg' is non-null
→
7
←
Taking false branch
→
232
233 ss_dlg->addMissingRows(sd);
8
←
Calling 'SimpleStatisticsDialog::addMissingRows'
→
234
235 QTreeWidgetItemIterator it(ss_dlg->statsTreeWidget());
236 while (*it) {
237 if ((*it)->type() == simple_row_type_) {
238 SimpleStatisticsTreeWidgetItem *ss_ti = static_cast<SimpleStatisticsTreeWidgetItem *>((*it));
239 ss_ti->draw();
240 }
241 ++it;
242 }
243
244 for (int i = 0; i < ss_dlg->statsTreeWidget()->columnCount() - 1; i++) {
245 ss_dlg->statsTreeWidget()->resizeColumnToContents(i);
246 }
247}
248
249void SimpleStatisticsDialog::fillTree()
250{
251 stat_data_t stat_data;
252 stat_data.stat_tap_data = stu_;
253 stat_data.user_data = this;
254
255 stu_->stat_tap_init_cb(stu_);
256
257 QString display_filter = displayFilter();
258 if (!registerTapListener(stu_->tap_name,
1
Assuming the condition is false
→
2
←
Taking false branch
→
259 &stat_data,
260 display_filter.toUtf8().constData(),
261 0,
262 tapReset,
263 stu_->packet_func,
264 tapDraw)) {
265 free_stat_tables(stu_);
266 reject(); // XXX Stay open instead?
267 return;
268 }
269
270 statsTreeWidget()->setSortingEnabled(false);
271
272 cap_file_.retapPackets();
273
274 // We only have one table. Move its tree items up one level.
275 if (statsTreeWidget()->invisibleRootItem()->childCount() == 1) {
3
←
Assuming the condition is false
→
4
←
Taking false branch
→
276 statsTreeWidget()->setRootIndex(statsTreeWidget()->model()->index(0, 0));
277 }
278
279 tapDraw(&stat_data);
5
←
Calling 'SimpleStatisticsDialog::tapDraw'
→
280
281 statsTreeWidget()->sortItems(0, Qt::AscendingOrder);
282 statsTreeWidget()->setSortingEnabled(true);
283
284 removeTapListeners();
285}
286
287// This is how an item is represented for exporting.
288QList<QVariant> SimpleStatisticsDialog::treeItemData(QTreeWidgetItem *it) const
289{
290 // Cast up to our type.
291 SimpleStatisticsTreeWidgetItem *rit = dynamic_cast<SimpleStatisticsTreeWidgetItem*>(it);
292 if (rit) {
293 return rit->rowData();
294 }
295 else {
296 return QList<QVariant>();
297 }
298}
299
300
301SimpleStatisticsDialog::~SimpleStatisticsDialog()
302{
303 stu_->refcount--;
304 if (stu_->refcount == 0) {
305 if (stu_->tables)
306 free_stat_tables(stu_);
307 }
308}