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glibc  2.9
Defines | Typedefs | Functions | Variables
test-strcpy_chk.c File Reference
#include <fcntl.h>
#include <paths.h>
#include <setjmp.h>
#include <signal.h>
#include "../test-skeleton.c"
#include "../string/test-string.h"
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Defines

#define STRCPY_RESULT(dst, len)   dst
#define TEST_MAIN

Typedefs

typedef char *(* proto_t )(char *, const char *, size_t)

Functions

void __attribute__ ((noreturn))
static void handler (int sig)
static void do_one_test (impl_t *impl, char *dst, const char *src, size_t len, size_t dlen)
static void do_test (size_t align1, size_t align2, size_t len, size_t dlen, int max_char)
static void do_random_tests (void)
int test_main (void)

Variables

volatile int chk_fail_ok
jmp_buf chk_fail_buf

Define Documentation

#define STRCPY_RESULT (   dst,
  len 
)    dst

Definition at line 22 of file test-strcpy_chk.c.

#define TEST_MAIN

Definition at line 23 of file test-strcpy_chk.c.


Typedef Documentation

typedef char*(* proto_t)(char *, const char *, size_t)

Definition at line 69 of file test-strcpy_chk.c.


Function Documentation

void __attribute__ ( (noreturn)  )

Definition at line 26 of file test-strcpy_chk.c.

{
  char *ret = dst;
  if (! len)
    __chk_fail ();
  while ((*dst++ = *src++) != '\0')
    if (--len == 0)
      __chk_fail ();
  return ret;
}

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static void do_one_test ( impl_t impl,
char *  dst,
const char *  src,
size_t  len,
size_t  dlen 
) [static]

Definition at line 72 of file test-strcpy_chk.c.

{
  char *res;
  if (dlen <= len)
    {
      if (impl->test == 1)
       return;

      chk_fail_ok = 1;
      if (setjmp (chk_fail_buf) == 0)
       {
         res = CALL (impl, dst, src, dlen);
         printf ("*** Function %s (%zd; %zd) did not __chk_fail\n",
                impl->name, len, dlen);
         chk_fail_ok = 0;
         ret = 1;
       }
      return;
    }
  else
    res = CALL (impl, dst, src, dlen);

  if (res != STRCPY_RESULT (dst, len))
    {
      printf ("Wrong result in function %s %p %p\n", impl->name,
             res, STRCPY_RESULT (dst, len));
      ret = 1;
      return;
    }

  if (strcmp (dst, src) != 0)
    {
      printf ("Wrong result in function %s dst \"%s\" src \"%s\"\n",
             impl->name, dst, src);
      ret = 1;
      return;
    }

  if (HP_TIMING_AVAIL)
    {
      hp_timing_t start __attribute ((unused));
      hp_timing_t stop __attribute ((unused));;
      hp_timing_t best_time = ~ (hp_timing_t) 0;
      size_t i;

      for (i = 0; i < 32; ++i)
       {
         HP_TIMING_NOW (start);
         CALL (impl, dst, src, dlen);
         HP_TIMING_NOW (stop);
         HP_TIMING_BEST (best_time, start, stop);
       }

      printf ("\t%zd", (size_t) best_time);
    }
}

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static void do_random_tests ( void  ) [static]

Definition at line 162 of file test-strcpy_chk.c.

{
  size_t i, j, n, align1, align2, len, dlen;
  unsigned char *p1 = buf1 + page_size - 512;
  unsigned char *p2 = buf2 + page_size - 512;
  unsigned char *res;

  for (n = 0; n < ITERATIONS; n++)
    {
      align1 = random () & 31;
      if (random () & 1)
       align2 = random () & 31;
      else
       align2 = align1 + (random () & 24);
      len = random () & 511;
      j = align1;
      if (align2 > j)
       j = align2;
      if (len + j >= 511)
       len = 510 - j - (random () & 7);
      j = len + align1 + 64;
      if (j > 512)
       j = 512;
      for (i = 0; i < j; i++)
       {
         if (i == len + align1)
           p1[i] = 0;
         else
           {
             p1[i] = random () & 255;
             if (i >= align1 && i < len + align1 && !p1[i])
              p1[i] = (random () & 127) + 3;
           }
       }

      switch (random () & 7)
       {
       case 0:
         dlen = len - (random () & 31);
         if (dlen > len)
           dlen = len;
         break;
       case 1:
         dlen = (size_t) -1;
         break;
       case 2:
         dlen = len + 1 + (random () & 65535);
         break;
       case 3:
         dlen = len + 1 + (random () & 255);
         break;
       case 4:
         dlen = len + 1 + (random () & 31);
         break;
       case 5:
         dlen = len + 1 + (random () & 7);
         break;
       case 6:
         dlen = len + 1 + (random () & 3);
         break;
       default:
         dlen = len + 1;
         break;
       }

      FOR_EACH_IMPL (impl, 1)
       {
         if (dlen <= len)
           {
             if (impl->test != 1)
              {
                chk_fail_ok = 1;
                if (setjmp (chk_fail_buf) == 0)
                  {
                    res = (unsigned char *)
                         CALL (impl, (char *) p2 + align2,
                              (char *) p1 + align1, dlen);
                    printf ("Iteration %zd - did not __chk_fail\n", n);
                    chk_fail_ok = 0;
                    ret = 1;
                  }
              }
             continue;
           }
         memset (p2 - 64, '\1', 512 + 64);
         res = (unsigned char *)
              CALL (impl, (char *) p2 + align2, (char *) p1 + align1, dlen);
         if (res != STRCPY_RESULT (p2 + align2, len))
           {
             printf ("\
Iteration %zd - wrong result in function %s (%zd, %zd, %zd) %p != %p\n",
                    n, impl->name, align1, align2, len, res,
                    STRCPY_RESULT (p2 + align2, len));
             ret = 1;
           }
         for (j = 0; j < align2 + 64; ++j)
           {
             if (p2[j - 64] != '\1')
              {
                printf ("\
Iteration %zd - garbage before, %s (%zd, %zd, %zd)\n",
                       n, impl->name, align1, align2, len);
                ret = 1;
                break;
              }
           }
         for (j = align2 + len + 1; j < 512; ++j)
           {
             if (p2[j] != '\1')
              {
                printf ("\
Iteration %zd - garbage after, %s (%zd, %zd, %zd)\n",
                       n, impl->name, align1, align2, len);
                ret = 1;
                break;
              }
           }
         if (memcmp (p1 + align1, p2 + align2, len + 1))
           {
             printf ("\
Iteration %zd - different strings, %s (%zd, %zd, %zd)\n",
                    n, impl->name, align1, align2, len);
             ret = 1;
           }
       }
    }
}

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static void do_test ( size_t  align1,
size_t  align2,
size_t  len,
size_t  dlen,
int  max_char 
) [static]

Definition at line 131 of file test-strcpy_chk.c.

{
  size_t i;
  char *s1, *s2;

  align1 &= 7;
  if (align1 + len >= page_size)
    return;

  align2 &= 7;
  if (align2 + len >= page_size)
    return;

  s1 = (char *) buf1 + align1;
  s2 = (char *) buf2 + align2;

  for (i = 0; i < len; i++)
    s1[i] = 32 + 23 * i % (max_char - 32);
  s1[len] = 0;

  if (HP_TIMING_AVAIL && dlen > len)
    printf ("Length %4zd, alignment %2zd/%2zd:", len, align1, align2);

  FOR_EACH_IMPL (impl, 0)
    do_one_test (impl, s2, s1, len, dlen);

  if (HP_TIMING_AVAIL && dlen > len)
    putchar ('\n');
}

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static void handler ( int  sig) [static]

Definition at line 58 of file test-strcpy_chk.c.

{
  if (chk_fail_ok)
    {
      chk_fail_ok = 0;
      longjmp (chk_fail_buf, 1);
    }
  else
    _exit (127);
}

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int test_main ( void  )

Definition at line 291 of file test-strcpy_chk.c.

{
  size_t i;

  struct sigaction sa;
  sa.sa_handler = handler;
  sa.sa_flags = 0;
  sigemptyset (&sa.sa_mask);

  sigaction (SIGABRT, &sa, NULL);

  /* Avoid all the buffer overflow messages on stderr.  */
  int fd = open (_PATH_DEVNULL, O_WRONLY);
  if (fd == -1)
    close (STDERR_FILENO);
  else
    {
      dup2 (fd, STDERR_FILENO);
      close (fd);
    }
  setenv ("LIBC_FATAL_STDERR_", "1", 1);

  test_init ();

  printf ("%23s", "");
  FOR_EACH_IMPL (impl, 0)
    printf ("\t%s", impl->name);
  putchar ('\n');

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i + 1, 127);
      do_test (0, 0, i, i + 1, 255);
      do_test (0, i, i, i + 1, 127);
      do_test (i, 0, i, i + 1, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) + 1, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 1, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + 1, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + 1, 255);
      do_test (i, i, (8 << i), (8 << i) + 1, 127);
      do_test (i, i, (8 << i), (8 << i) + 1, 255);
    }

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i + 256, 127);
      do_test (0, 0, i, i + 256, 255);
      do_test (0, i, i, i + 256, 127);
      do_test (i, 0, i, i + 256, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) + 256, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 256, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + 256, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + 256, 255);
      do_test (i, i, (8 << i), (8 << i) + 256, 127);
      do_test (i, i, (8 << i), (8 << i) + 256, 255);
    }

  for (i = 0; i < 16; ++i)
    {
      do_test (0, 0, i, i, 127);
      do_test (0, 0, i, i + 2, 255);
      do_test (0, i, i, i + 3, 127);
      do_test (i, 0, i, i + 4, 255);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (0, 0, 8 << i, (8 << i) - 15, 127);
      do_test (8 - i, 2 * i, (8 << i), (8 << i) + 5, 127);
    }

  for (i = 1; i < 8; ++i)
    {
      do_test (i, 2 * i, (8 << i), (8 << i) + i, 127);
      do_test (2 * i, i, (8 << i), (8 << i) + (i - 1), 255);
      do_test (i, i, (8 << i), (8 << i) + i + 2, 127);
      do_test (i, i, (8 << i), (8 << i) + i + 3, 255);
    }

  do_random_tests ();
  return ret;
}

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Variable Documentation

jmp_buf chk_fail_buf

Definition at line 55 of file test-strcpy_chk.c.

volatile int chk_fail_ok

Definition at line 54 of file test-strcpy_chk.c.