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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [gcc/] [testsuite/] [gcc.c-torture/] [execute/] [builtins/] [vsnprintf-chk.c] - Blame information for rev 688

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Line No. Rev Author Line
1 688 jeremybenn 
/* Copyright (C) 2004, 2005  Free Software Foundation.
2 
 
3 
   Ensure builtin __vsnprintf_chk performs correctly.  */
4 
 
5 
#include <stdarg.h>
6 
 
7 
extern void abort (void);
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typedef __SIZE_TYPE__ size_t;
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extern size_t strlen(const char *);
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extern void *memcpy (void *, const void *, size_t);
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extern char *strcpy (char *, const char *);
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extern int memcmp (const void *, const void *, size_t);
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extern void *memset (void *, int, size_t);
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extern int vsnprintf (char *, size_t, const char *, va_list);
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#include "chk.h"
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const char s1[] = "123";
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char p[32] = "";
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char *s2 = "defg";
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char *s3 = "FGH";
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char *s4;
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size_t l1 = 1;
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static char buffer[32];
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char * volatile ptr = "barf";  /* prevent constant propagation to happen when whole program assumptions are made.  */
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27 
int
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__attribute__((noinline))
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test1_sub (int i, ...)
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{
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  int ret = 0;
32 
  va_list ap;
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  va_start (ap, i);
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  switch (i)
35 
    {
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    case 0:
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      vsnprintf (buffer, 4, "foo", ap);
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      break;
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    case 1:
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      ret = vsnprintf (buffer, 4, "foo bar", ap);
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      break;
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    case 2:
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      vsnprintf (buffer, 32, "%s", ap);
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      break;
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    case 3:
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      ret = vsnprintf (buffer, 21, "%s", ap);
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      break;
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    case 4:
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      ret = vsnprintf (buffer, 4, "%d%d%d", ap);
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      break;
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    case 5:
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      ret = vsnprintf (buffer, 32, "%d%d%d", ap);
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      break;
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    case 6:
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      ret = vsnprintf (buffer, strlen (ptr) + 1, "%s", ap);
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      break;
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    case 7:
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      vsnprintf (buffer, l1 + 31, "%d - %c", ap);
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      break;
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    case 8:
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      vsnprintf (s4, l1 + 6, "%d - %c", ap);
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      break;
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    }
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  va_end (ap);
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  return ret;
66 
}
67 
 
68 
void
69 
__attribute__((noinline))
70 
test1 (void)
71 
{
72 
  chk_calls = 0;
73 
  /* vsnprintf_disallowed = 1; */
74 
 
75 
  memset (buffer, 'A', 32);
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  test1_sub (0);
77 
  if (memcmp (buffer, "foo", 4) || buffer[4] != 'A')
78 
    abort ();
79 
 
80 
  memset (buffer, 'A', 32);
81 
  if (test1_sub (1) != 7)
82 
    abort ();
83 
  if (memcmp (buffer, "foo", 4) || buffer[4] != 'A')
84 
    abort ();
85 
 
86 
  vsnprintf_disallowed = 0;
87 
 
88 
  memset (buffer, 'A', 32);
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  test1_sub (2, "bar");
90 
  if (memcmp (buffer, "bar", 4) || buffer[4] != 'A')
91 
    abort ();
92 
 
93 
  memset (buffer, 'A', 32);
94 
  if (test1_sub (3, "bar") != 3)
95 
    abort ();
96 
  if (memcmp (buffer, "bar", 4) || buffer[4] != 'A')
97 
    abort ();
98 
 
99 
  memset (buffer, 'A', 32);
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  if (test1_sub (4, (int) l1, (int) l1 + 1, (int) l1 + 12) != 4)
101 
    abort ();
102 
  if (memcmp (buffer, "121", 4) || buffer[4] != 'A')
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    abort ();
104 
 
105 
  memset (buffer, 'A', 32);
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  if (test1_sub (5, (int) l1, (int) l1 + 1, (int) l1 + 12) != 4)
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    abort ();
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  if (memcmp (buffer, "1213", 5) || buffer[5] != 'A')
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    abort ();
110 
 
111 
  if (chk_calls)
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    abort ();
113 
 
114 
  memset (buffer, 'A', 32);
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  test1_sub (6, ptr);
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  if (memcmp (buffer, "barf", 5) || buffer[5] != 'A')
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    abort ();
118 
 
119 
  memset (buffer, 'A', 32);
120 
  test1_sub (7, (int) l1 + 27, *ptr);
121 
  if (memcmp (buffer, "28 - b\0AAAAA", 12))
122 
    abort ();
123 
 
124 
  if (chk_calls != 2)
125 
    abort ();
126 
  chk_calls = 0;
127 
 
128 
  memset (s4, 'A', 32);
129 
  test1_sub (8, (int) l1 - 17, ptr[1]);
130 
  if (memcmp (s4, "-16 - \0AAA", 10))
131 
    abort ();
132 
  if (chk_calls)
133 
    abort ();
134 
}
135 
 
136 
void
137 
__attribute__((noinline))
138 
test2_sub (int i, ...)
139 
{
140 
  va_list ap;
141 
  struct A { char buf1[10]; char buf2[10]; } a;
142 
  char *r = l1 == 1 ? &a.buf1[5] : &a.buf2[4];
143 
  char buf3[20];
144 
  int j;
145 
 
146 
  va_start (ap, i);
147 
  /* The following calls should do runtime checking
148 
     - length is not known, but destination is.  */
149 
  switch (i)
150 
    {
151 
    case 0:
152 
      vsnprintf (a.buf1 + 2, l1, "%s", ap);
153 
      break;
154 
    case 1:
155 
      vsnprintf (r, l1 + 4, "%s%c", ap);
156 
      break;
157 
    case 2:
158 
      r = l1 == 1 ? __builtin_alloca (4) : &a.buf2[7];
159 
      vsnprintf (r, strlen (s2) - 2, "%c %s", ap);
160 
      break;
161 
    case 3:
162 
      r = l1 == 1 ? __builtin_alloca (4) : &a.buf2[7];
163 
      vsnprintf (r + 2, l1, s3 + 3, ap);
164 
      break;
165 
    case 4:
166 
    case 7:
167 
      r = buf3;
168 
      for (j = 0; j < 4; ++j)
169 
        {
170 
          if (j == l1 - 1)
171 
            r = &a.buf1[1];
172 
          else if (j == l1)
173 
            r = &a.buf2[7];
174 
          else if (j == l1 + 1)
175 
            r = &buf3[5];
176 
          else if (j == l1 + 2)
177 
            r = &a.buf1[9];
178 
        }
179 
      if (i == 4)
180 
        vsnprintf (r, l1, s2 + 4, ap);
181 
      else
182 
        vsnprintf (r, 1, "a", ap);
183 
      break;
184 
    case 5:
185 
      r = l1 == 1 ? __builtin_alloca (4) : &a.buf2[7];
186 
      vsnprintf (r, l1 + 3, "%s", ap);
187 
      break;
188 
    case 6:
189 
      vsnprintf (a.buf1 + 2, 4, "", ap);
190 
      break;
191 
    case 8:
192 
      vsnprintf (s4, 3, "%s %d", ap);
193 
      break;
194 
    }
195 
  va_end (ap);
196 
}
197 
 
198 
/* Test whether compile time checking is done where it should
199 
   and so is runtime object size checking.  */
200 
void
201 
__attribute__((noinline))
202 
test2 (void)
203 
{
204 
  /* The following calls should do runtime checking
205 
     - length is not known, but destination is.  */
206 
  chk_calls = 0;
207 
  test2_sub (0, s3 + 3);
208 
  test2_sub (1, s3 + 3, s3[3]);
209 
  test2_sub (2, s2[2], s2 + 4);
210 
  test2_sub (3);
211 
  test2_sub (4);
212 
  test2_sub (5, s1 + 1);
213 
  if (chk_calls != 6)
214 
    abort ();
215 
 
216 
  /* Following have known destination and known source length,
217 
     so if optimizing certainly shouldn't result in the checking
218 
     variants.  */
219 
  chk_calls = 0;
220 
  /* vsnprintf_disallowed = 1; */
221 
  test2_sub (6);
222 
  test2_sub (7);
223 
  vsnprintf_disallowed = 0;
224 
  /* Unknown destination and source, no checking.  */
225 
  test2_sub (8, s3, 0);
226 
  if (chk_calls)
227 
    abort ();
228 
}
229 
 
230 
void
231 
__attribute__((noinline))
232 
test3_sub (int i, ...)
233 
{
234 
  va_list ap;
235 
  struct A { char buf1[10]; char buf2[10]; } a;
236 
  char buf3[20];
237 
 
238 
  va_start (ap, i);
239 
  /* The following calls should do runtime checking
240 
     - source length is not known, but destination is.  */
241 
  switch (i)
242 
    {
243 
    case 0:
244 
      vsnprintf (&a.buf2[9], l1 + 1, "%c%s", ap);
245 
      break;
246 
    case 1:
247 
      vsnprintf (&a.buf2[7], l1 + 30, "%s%c", ap);
248 
      break;
249 
    case 2:
250 
      vsnprintf (&a.buf2[7], l1 + 3, "%d", ap);
251 
      break;
252 
    case 3:
253 
      vsnprintf (&buf3[17], l1 + 3, "%s", ap);
254 
      break;
255 
    case 4:
256 
      vsnprintf (&buf3[19], 2, "a", ap);
257 
      break;
258 
    case 5:
259 
      vsnprintf (&buf3[16], 5, "a", ap);
260 
      break;
261 
    }
262 
  va_end (ap);
263 
}
264 
 
265 
/* Test whether runtime and/or compile time checking catches
266 
   buffer overflows.  */
267 
void
268 
__attribute__((noinline))
269 
test3 (void)
270 
{
271 
  chk_fail_allowed = 1;
272 
  /* Runtime checks.  */
273 
  if (__builtin_setjmp (chk_fail_buf) == 0)
274 
    {
275 
      test3_sub (0, s2[3], s2 + 4);
276 
      abort ();
277 
    }
278 
  if (__builtin_setjmp (chk_fail_buf) == 0)
279 
    {
280 
      test3_sub (1, s3 + strlen (s3) - 2, *s3);
281 
      abort ();
282 
    }
283 
  if (__builtin_setjmp (chk_fail_buf) == 0)
284 
    {
285 
      test3_sub (2, (int) l1 + 9999);
286 
      abort ();
287 
    }
288 
  if (__builtin_setjmp (chk_fail_buf) == 0)
289 
    {
290 
      test3_sub (3, "abc");
291 
      abort ();
292 
    }
293 
  /* This should be detectable at compile time already.  */
294 
  if (__builtin_setjmp (chk_fail_buf) == 0)
295 
    {
296 
      test3_sub (4);
297 
      abort ();
298 
    }
299 
  if (__builtin_setjmp (chk_fail_buf) == 0)
300 
    {
301 
      test3_sub (5);
302 
      abort ();
303 
    }
304 
  chk_fail_allowed = 0;
305 
}
306 
 
307 
void
308 
main_test (void)
309 
{
310 
#ifndef __OPTIMIZE__
311 
  /* Object size checking is only intended for -O[s123].  */
312 
  return;
313 
#endif
314 
  __asm ("" : "=r" (s2) : "0" (s2));
315 
  __asm ("" : "=r" (s3) : "0" (s3));
316 
  __asm ("" : "=r" (l1) : "0" (l1));
317 
  s4 = p;
318 
  test1 ();
319 
  test2 ();
320 
  test3 ();
321 
}

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