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* string/bug-stpncpy-offend.c: New file.

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* string/Makefile (tests): Add it.
This commit is contained in:
Roland McGrath 2002-09-23 03:57:55 +00:00
parent da5ad344ff
commit df075e0920
3 changed files with 60 additions and 2 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2002-09-22 Roland McGrath <roland@redhat.com>
* string/bug-stpncpy-offend.c: New file.
* string/Makefile (tests): Add it.
2002-09-21 Carlos O'Donell <carlos@baldric.uwo.ca>
* sysdeps/hppa/abort-instr.h: New file.

4
string/Makefile
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@ -1,4 +1,4 @@
# Copyright (C) 1991-1999, 2000, 2001 Free Software Foundation, Inc.
# Copyright (C) 1991-1999,2000,2001,2002 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
@ -48,7 +48,7 @@ o-objects.ob := memcpy.o memset.o memchr.o
tests := tester inl-tester noinl-tester testcopy test-ffs \
tst-strlen stratcliff tst-svc tst-inlcall \
bug-strncat1 bug-strspn1 bug-strpbrk1 tst-bswap \
tst-strtok tst-strxfrm bug-strcoll1
tst-strtok tst-strxfrm bug-strcoll1 bug-stpncpy-offend
distribute := memcopy.h pagecopy.h tst-svc.expect

53
string/bug-stpncpy-offend.c Normal file
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@ -0,0 +1,53 @@
/* Test program for stpncpy reading off the end of the source string. */
#include <string.h>
#include <sys/mman.h>
#include <unistd.h>
static int do_test (void);
#define TEST_FUNCTION do_test ()
#include <test-skeleton.c>
static int
do_test (void)
{
/* We get two pages of memory and then protect the second one so
we are sure to fault if we access past the end of the first page.
Then we test the odd-size string ending just on the page boundary. */
static const char test_string[] = "Seven.";
const size_t pagesz = getpagesize ();
char *buf = mmap (NULL, pagesz * 2,
PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANON, -1, 0);
char *s1, *r;
volatile size_t len = sizeof test_string;
if (buf == MAP_FAILED)
{
perror ("mmap");
return 1;
}
if (mprotect (buf + pagesz, pagesz, PROT_NONE) != 0)
{
perror ("mprotect");
return 2;
}
s1 = buf + pagesz - sizeof test_string;
memcpy (s1, test_string, sizeof test_string);
r = stpncpy (buf, s1, len);
if (r != buf + len - 1)
{
printf ("r = buf + %d != %zu\n", r - buf, len - 1);
return 3;
}
r = stpncpy (s1, buf, len);
if (r != s1 + len - 1)
{
printf ("r = s1 + %d != %zu\n", r - s1, len - 1);
return 3;
}
return 0;
}