1 /* { dg-do compile }
2 { dg-options "-O2 -Wall -Wformat-overflow=1 -ftrack-macro-expansion=0" }
3 { dg-require-effective-target int32plus } */
4
5 typedef __SIZE_TYPE__ size_t;
6 typedef __WCHAR_TYPE__ wchar_t;
7
8 #define INT_MAX __INT_MAX__
9 #define INT_MIN (-INT_MAX - 1)
10
11 /* When debugging, define LINE to the line number of the test case to exercise
12 and avoid exercising any of the others. The buffer and objsize macros
13 below make use of LINE to avoid warnings for other lines. */
14 #ifndef LINE
15 # define LINE 0
16 #endif
17
18 void sink (char*, char*);
19
20 int dummy_sprintf (char*, const char*, ...);
21
22 char buffer [256];
23 extern char *ptr;
24
25 static int int_range (int min, int max)
26 {
27 extern int int_value (void);
28 int n = int_value ();
29 return n < min || max < n ? min : n;
30 }
31
32 /* Evaluate to an array of SIZE characters when non-negative, or to
33 a pointer to an unknown object otherwise. */
34 #define buffer(size) \
35 ((0 <= size) ? buffer + sizeof buffer - (size) : ptr)
36
37 /* Helper to expand function to either __builtin_f or dummy_f to
38 make debugging GCC easy. */
39 #define FUNC(f) \
40 ((!LINE || LINE == __LINE__) ? __builtin_ ## f : dummy_ ## f)
41
42 /* Macro to verify that calls to __builtin_sprintf (i.e., with no size
43 argument) issue diagnostics by correctly determining the size of
44 the destination buffer. */
45 #define T(size, ...) \
46 (FUNC (sprintf) (buffer (size), __VA_ARGS__), \
47 sink (buffer, ptr))
48
49 /* Return a signed integer in the range [MIN, MAX]. */
50 #define R(min, max) int_range (min, max)
51
52 /* Verify warnings and ranges for certain overflow. */
53 void test_min_overflow (int i)
54 {
55 T (0, "%#hho", i); /* { dg-warning "between 1 and 4 bytes" } */
56 T (0, "%#1hho", i); /* { dg-warning "between 1 and 4 bytes" } */
57 T (0, "%#2hho", i); /* { dg-warning "between 2 and 4 bytes" } */
58 T (0, "%#3hho", i); /* { dg-warning "between 3 and 4 bytes" } */
59 T (0, "%#4hho", i); /* { dg-warning "writing 4 bytes" } */
60 T (0, "%#hho", R (-1, 0)); /* { dg-warning "between 1 and 4 bytes" } */
61 T (0, "%#1hho", R (-1, 0)); /* { dg-warning "between 1 and 4 bytes" } */
62 T (0, "%#2hho", R (-1, 0)); /* { dg-warning "between 2 and 4 bytes" } */
63 T (0, "%#3hho", R (-1, 0)); /* { dg-warning "between 3 and 4 bytes" } */
64 T (0, "%#4hho", R (-1, 0)); /* { dg-warning "writing 4 bytes" } */
65 T (0, "%#hho", R (-1, 1)); /* { dg-warning "between 1 and 4 bytes" } */
66 T (0, "%#1hho", R (-1, 1)); /* { dg-warning "between 1 and 4 bytes" } */
67 T (0, "%#2hho", R (-1, 1)); /* { dg-warning "between 2 and 4 bytes" } */
68 T (0, "%#3hho", R (-1, 1)); /* { dg-warning "between 3 and 4 bytes" } */
69 T (0, "%#4hho", R (-1, 1)); /* { dg-warning "writing 4 bytes" } */
70 T (0, "%#hho", R ( 0, 1)); /* { dg-warning "between 1 and 2 bytes" } */
71 T (0, "%#1hho", R ( 0, 1)); /* { dg-warning "between 1 and 2 bytes" } */
72 T (0, "%#2hho", R ( 0, 1)); /* { dg-warning "writing 2 bytes" } */
73 T (0, "%#3hho", R ( 0, 1)); /* { dg-warning "writing 3 bytes" } */
74 T (0, "%#4hho", R ( 0, 1)); /* { dg-warning "writing 4 bytes" } */
75 T (0, "%#hho", R ( 1, 2)); /* { dg-warning "writing 2 bytes" } */
76 T (0, "%#1hho", R ( 1, 2)); /* { dg-warning "writing 2 bytes" } */
77 T (0, "%#2hho", R ( 1, 2)); /* { dg-warning "writing 2 bytes" } */
78 T (0, "%#3hho", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
79 T (0, "%#4hho", R ( 1, 2)); /* { dg-warning "writing 4 bytes" } */
80
81 T (0, "%#ho", i); /* { dg-warning "between 1 and 7 bytes" } */
82 T (0, "%#.*ho", /* { dg-warning "between 1 and 7 bytes" } */
83 R (0, 2), i);
84 T (0, "%#.*ho", /* { dg-warning "between 1 and 7 bytes" } */
85 R (1, 2), i);
86 T (0, "%#.*ho", /* { dg-warning "between 2 and 7 bytes" } */
87 R (2, 3), i);
88 T (0, "%#.*ho", /* { dg-warning "between 3 and 7 bytes" } */
89 R (3, 4), i);
90 T (0, "%#.*ho", /* { dg-warning "between 7 and 8 bytes" } */
91 R (7, 8), i);
92
93 T (0, "%#ho", R (-1, 0)); /* { dg-warning "between 1 and 7 bytes" } */
94 T (0, "%#ho", R (-1, 1)); /* { dg-warning "between 1 and 7 bytes" } */
95 T (0, "%#ho", R ( 0, 1)); /* { dg-warning "between 1 and 2 bytes" } */
96 T (0, "%#ho", R ( 1, 2)); /* { dg-warning "writing 2 bytes" } */
97
98 T (0, "%#o", i); /* { dg-warning "between 1 and 12 bytes" } */
99 T (0, "%#o", R (-1, 0)); /* { dg-warning "between 1 and 12 bytes" } */
100 T (0, "%#o", R (-1, 1)); /* { dg-warning "between 1 and 12 bytes" } */
101 T (0, "%#o", R ( 0, 1)); /* { dg-warning "between 1 and 2 bytes" } */
102 T (0, "%#o", R ( 1, 2)); /* { dg-warning "writing 2 bytes" } */
103
104 T (0, "%#hhx", i); /* { dg-warning "between 1 and 4 bytes" } */
105 T (0, "%#.*hhx", /* { dg-warning "writing up to 4 bytes" } */
106 R (0, 2), i);
107 T (0, "%#.*hhx", /* { dg-warning "between 1 and 4 bytes" } */
108 R (1, 2), i);
109 T (0, "%#.*hhx", /* { dg-warning "between 2 and 5 bytes" } */
110 R (2, 3), i);
111 T (0, "%#.*hhx", /* { dg-warning "between 3 and 6 bytes" } */
112 R (3, 4), i);
113
114 T (0, "%#hhx", R (-1, 0)); /* { dg-warning "between 1 and 4 bytes" } */
115 T (0, "%#hhx", R (-1, 1)); /* { dg-warning "between 1 and 4 bytes" } */
116 T (0, "%#hhx", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
117 T (0, "%#hhx", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
118
119 T (0, "%#hx", i); /* { dg-warning "between 1 and 6 bytes" } */
120 T (0, "%#hx", R (-1, 0)); /* { dg-warning "between 1 and 6 bytes" } */
121 T (0, "%#hx", R (-1, 1)); /* { dg-warning "between 1 and 6 bytes" } */
122 T (0, "%#hx", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
123 T (0, "%#hx", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
124
125 T (0, "%#x", i); /* { dg-warning "between 1 and 10 bytes" } */
126 T (0, "%#x", R (-1, 0)); /* { dg-warning "between 1 and 10 bytes" } */
127 T (0, "%#x", R (-1, 1)); /* { dg-warning "between 1 and 10 bytes" } */
128 T (0, "%#x", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
129 T (0, "%#x", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
130 }
131
132 /* Verify warnings and ranges for likely overflow. */
133 void test_likely_overflow (int i)
134 {
135 T (2, "%#hho", i); /* { dg-warning "may write a terminating nul" } */
136 T (2, "%#1hho", i); /* { dg-warning "may write a terminating nul" } */
137 T (2, "%#2hho", i); /* { dg-warning "writing a terminating nul" } */
138 T (2, "%#3hho", i); /* { dg-warning "between 3 and 4 bytes" } */
139 T (2, "%#4hho", i); /* { dg-warning "writing 4 bytes" } */
140 T (2, "%#hho", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
141 T (2, "%#1hho", R (-1, 0));/* { dg-warning "may write a terminating nul" } */
142 T (2, "%#2hho", R (-1, 0));/* { dg-warning "writing a terminating nul" } */
143 T (2, "%#3hho", R (-1, 0));/* { dg-warning "between 3 and 4 bytes" } */
144 T (2, "%#4hho", R (-1, 0));/* { dg-warning "writing 4 bytes" } */
145 T (2, "%#hho", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
146 T (2, "%#1hho", R (-1, 1));/* { dg-warning "may write a terminating nul" } */
147 T (2, "%#2hho", R (-1, 1));/* { dg-warning "writing a terminating nul" } */
148 T (2, "%#3hho", R (-1, 1));/* { dg-warning "between 3 and 4 bytes" } */
149 T (2, "%#4hho", R (-1, 1));/* { dg-warning "writing 4 bytes" } */
150 T (2, "%#hho", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
151 T (2, "%#1hho", R ( 0, 1));/* { dg-warning "may write a terminating nul" } */
152 T (2, "%#2hho", R ( 0, 1));/* { dg-warning "writing a terminating nul" } */
153 T (2, "%#3hho", R ( 0, 1));/* { dg-warning "writing 3 bytes" } */
154 T (2, "%#4hho", R ( 0, 1));/* { dg-warning "writing 4 bytes" } */
155 T (2, "%#hho", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
156 T (2, "%#1hho", R ( 1, 2));/* { dg-warning "writing a terminating nul" } */
157 T (2, "%#2hho", R ( 1, 2));/* { dg-warning "writing a terminating nul" } */
158 T (2, "%#3hho", R ( 1, 2));/* { dg-warning "writing 3 bytes" } */
159 T (2, "%#4hho", R ( 1, 2));/* { dg-warning "writing 4 bytes" } */
160
161 T (2, "%#ho", i); /* { dg-warning "may write a terminating nul" } */
162 T (2, "%#ho", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
163 T (2, "%#ho", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
164 T (2, "%#ho", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
165 T (2, "%#ho", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
166
167 T (2, "%#o", i); /* { dg-warning "may write a terminating nul" } */
168 T (2, "%#o", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
169 T (2, "%#o", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
170 T (2, "%#o", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
171 T (2, "%#o", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
172
173 T (2, "%#hhx", i); /* { dg-warning "between 1 and 4 bytes" } */
174 T (2, "%#1hhx", i); /* { dg-warning "between 1 and 4 bytes" } */
175 T (2, "%#2hhx", i); /* { dg-warning "between 2 and 4 bytes" } */
176 T (2, "%#3hhx", i); /* { dg-warning "between 3 and 4 bytes" } */
177 T (2, "%#4hhx", i); /* { dg-warning "writing 4 bytes" } */
178 T (2, "%#1hhx", R (-1, 0));/* { dg-warning "between 1 and 4 bytes" } */
179 T (2, "%#2hhx", R (-1, 0));/* { dg-warning "between 2 and 4 bytes" } */
180 T (2, "%#3hhx", R (-1, 0));/* { dg-warning "between 3 and 4 bytes" } */
181 T (2, "%#4hhx", R (-1, 0));/* { dg-warning "writing 4 bytes" } */
182 T (2, "%#hhx", R (-1, 0)); /* { dg-warning "between 1 and 4 bytes" } */
183 T (2, "%#1hhx", R (-1, 0));/* { dg-warning "between 1 and 4 bytes" } */
184 T (2, "%#2hhx", R (-1, 0));/* { dg-warning "between 2 and 4 bytes" } */
185 T (2, "%#3hhx", R (-1, 0));/* { dg-warning "between 3 and 4 bytes" } */
186 T (2, "%#4hhx", R (-1, 0));/* { dg-warning "writing 4 bytes" } */
187 T (2, "%#hhx", R (-1, 1)); /* { dg-warning "between 1 and 4 bytes" } */
188 T (2, "%#1hhx", R (-1, 1));/* { dg-warning "between 1 and 4 bytes" } */
189 T (2, "%#2hhx", R (-1, 1));/* { dg-warning "between 2 and 4 bytes" } */
190 T (2, "%#3hhx", R (-1, 1));/* { dg-warning "between 3 and 4 bytes" } */
191 T (2, "%#4hhx", R (-1, 1));/* { dg-warning "writing 4 bytes" } */
192 T (2, "%#hhx", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
193 T (2, "%#1hhx", R ( 0, 1));/* { dg-warning "between 1 and 3 bytes" } */
194 T (2, "%#2hhx", R ( 0, 1));/* { dg-warning "between 2 and 3 bytes" } */
195 T (2, "%#3hhx", R ( 0, 1));/* { dg-warning "writing 3 bytes" } */
196 T (2, "%#4hhx", R ( 0, 1));/* { dg-warning "writing 4 bytes" } */
197 T (2, "%#hhx", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
198 T (2, "%#1hhx", R ( 1, 2));/* { dg-warning "writing 3 bytes" } */
199 T (2, "%#2hhx", R ( 1, 2));/* { dg-warning "writing 3 bytes" } */
200 T (2, "%#3hhx", R ( 1, 2));/* { dg-warning "writing 3 bytes" } */
201 T (2, "%#4hhx", R ( 1, 2));/* { dg-warning "writing 4 bytes" } */
202
203 T (2, "%#hx", i); /* { dg-warning "between 1 and 6 bytes" } */
204 T (2, "%#hx", R (-1, 0)); /* { dg-warning "between 1 and 6 bytes" } */
205 T (2, "%#hx", R (-1, 1)); /* { dg-warning "between 1 and 6 bytes" } */
206 T (2, "%#hx", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
207 T (2, "%#hx", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
208
209 T (2, "%#x", i); /* { dg-warning "between 1 and 10 bytes" } */
210 T (2, "%#x", R (-1, 0)); /* { dg-warning "between 1 and 10 bytes" } */
211 T (2, "%#x", R (-1, 1)); /* { dg-warning "between 1 and 10 bytes" } */
212 T (2, "%#x", R ( 0, 1)); /* { dg-warning "between 1 and 3 bytes" } */
213 T (2, "%#x", R ( 1, 2)); /* { dg-warning "writing 3 bytes" } */
214 }
215
216 /* Verify warnings likely overflow due to the terminating nul. */
217 void test_likely_nul_overflow (int i)
218 {
219 T (3, "%#hho", i);
220 T (3, "%#hho", R (-1, 0));
221 T (3, "%#hho", R (-1, 1));
222 T (3, "%#hho", R ( 0, 1));
223 T (3, "%#hho", R ( 1, 2));
224
225 T (3, "%#ho", i);
226 T (3, "%#ho", R (-1, 0));
227 T (3, "%#ho", R (-1, 1));
228 T (3, "%#ho", R ( 0, 1));
229 T (3, "%#ho", R ( 1, 2));
230
231 T (3, "%#o", i);
232 T (3, "%#o", R (-1, 0));
233 T (3, "%#o", R (-1, 1));
234 T (3, "%#o", R ( 0, 1));
235 T (3, "%#o", R ( 1, 2));
236
237 T (3, "%#hhx", i); /* { dg-warning "may write a terminating nul" } */
238 T (3, "%#hhx", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
239 T (3, "%#hhx", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
240 T (3, "%#hhx", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
241 T (3, "%#hhx", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
242
243 T (3, "%#hx", i); /* { dg-warning "may write a terminating nul" } */
244 T (3, "%#hx", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
245 T (3, "%#hx", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
246 T (3, "%#hx", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
247 T (3, "%#hx", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
248
249 T (3, "%#x", i); /* { dg-warning "may write a terminating nul" } */
250 T (3, "%#x", R (-1, 0)); /* { dg-warning "may write a terminating nul" } */
251 T (3, "%#x", R (-1, 1)); /* { dg-warning "may write a terminating nul" } */
252 T (3, "%#x", R ( 0, 1)); /* { dg-warning "may write a terminating nul" } */
253 T (3, "%#x", R ( 1, 2)); /* { dg-warning "writing a terminating nul" } */
254 }