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Refactor bug-strtod.c to better test new types.
This introduces tst-strtod.h to contain some macros
to assist with updating strto{f,d,ld} test code to
support additional variants of this function.
This commit is contained in:
Paul E. Murphy
parent
bc779a1a5b
commit
dba0832af1
@ -1,3 +1,10 @@
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2016-05-23 Paul E. Murphy <murphyp@linux.vnet.ibm.com>
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* stdlib/tst-strtod6.c (do_test): Use new type generic
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invocation of the test function.
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(test): Refactor into ...
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(TEST_STRTOD): New macro base function.
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2016-05-23 Florian Weimer <fweimer@redhat.com>
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CVE-2016-4429
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@ -21,73 +21,47 @@
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#include <stdlib.h>
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#include <string.h>
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#include "tst-strtod.h"
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#define TEST_STRTOD(FSUF, FTYPE, FTOSTR, FTOSTRM, LSUF, CSUF) \
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static int \
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test_strto ## FSUF (void) \
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{ \
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char buf[300]; \
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int cnt; \
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int result = 0; \
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\
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for (cnt = 0; cnt < 200; ++cnt) \
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{ \
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ssize_t n; \
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FTYPE f; \
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\
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n = sprintf (buf, "%d", cnt); \
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memset (buf + n, '0', cnt); \
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sprintf (buf + n + cnt, ".000e-%d", cnt); \
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f = strto ## FSUF (buf, NULL); \
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\
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if (f != (FTYPE) cnt) \
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{ \
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char fstr[FSTRLENMAX]; \
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char fcntstr[FSTRLENMAX]; \
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FTOSTR (fstr, sizeof (fstr), "%" FTOSTRM "g", f); \
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FTOSTR (fcntstr, sizeof (fstr), "%" FTOSTRM "g", (FTYPE) cnt); \
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printf ("strto" #FSUF "(\"%s\") " \
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"failed for cnt == %d (%s instead of %s)\n", \
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buf, cnt, fstr, fcntstr); \
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result = 1; \
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} \
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else \
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printf ( "strto" #FSUF "() fine for cnt == %d\n", cnt); \
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} \
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return result; \
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}
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GEN_TEST_STRTOD_FOREACH (TEST_STRTOD)
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int
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main (void)
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{
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char buf[300];
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int cnt;
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int result = 0;
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for (cnt = 0; cnt < 200; ++cnt)
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{
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ssize_t n;
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float f;
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n = sprintf (buf, "%d", cnt);
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memset (buf + n, '0', cnt);
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sprintf (buf + n + cnt, ".000e-%d", cnt);
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f = strtof (buf, NULL);
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if (f != (float) cnt)
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{
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printf ("strtof(\"%s\") failed for cnt == %d (%g instead of %g)\n",
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buf, cnt, f, (float) cnt);
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result = 1;
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}
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else
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printf ("strtof() fine for cnt == %d\n", cnt);
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}
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for (cnt = 0; cnt < 200; ++cnt)
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{
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ssize_t n;
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double f;
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n = sprintf (buf, "%d", cnt);
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memset (buf + n, '0', cnt);
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sprintf (buf + n + cnt, ".000e-%d", cnt);
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f = strtod (buf, NULL);
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if (f != (double) cnt)
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{
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printf ("strtod(\"%s\") failed for cnt == %d (%g instead of %g)\n",
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buf, cnt, f, (double) cnt);
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result = 1;
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}
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else
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printf ("strtod() fine for cnt == %d\n", cnt);
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}
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for (cnt = 0; cnt < 200; ++cnt)
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{
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ssize_t n;
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long double f;
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n = sprintf (buf, "%d", cnt);
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memset (buf + n, '0', cnt);
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sprintf (buf + n + cnt, ".000e-%d", cnt);
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f = strtold (buf, NULL);
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if (f != (long double) cnt)
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{
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printf ("strtold(\"%s\") failed for cnt == %d (%Lg instead of %Lg)\n",
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buf, cnt, f, (long double) cnt);
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result = 1;
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}
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else
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printf ("strtold() fine for cnt == %d\n", cnt);
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}
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return result;
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return STRTOD_TEST_FOREACH (test_strto);
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}
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50
stdlib/tst-strtod.h
Normal file
50
stdlib/tst-strtod.h
Normal file
@ -0,0 +1,50 @@
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/* Common utilities for testing strtod and its derivatives.
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This file is part of the GNU C Library.
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Copyright (C) 2016 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#ifndef _TST_STRTOD_H
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#define _TST_STRTOD_H
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#define FSTRLENMAX 128
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/* Splat n variants of the same test for the various strtod functions. */
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#define GEN_TEST_STRTOD_FOREACH(mfunc) \
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mfunc ( f, float, snprintf, "", f, f) \
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mfunc ( d, double, snprintf, "", , ) \
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mfunc ( ld, long double, snprintf, "L", L, l)
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/* The arguments to the generated macros are:
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FSUF - Function suffix
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FTYPE - float type
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FTOSTR - float to string func
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FTOSTRM - Optional modifier for FTOSTR format
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LSUF - Literal suffix
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CSUF - C standardish suffix for many of the math functions
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*/
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#define STRTOD_TEST_FOREACH(mfunc, ...) \
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({ \
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int result = 0; \
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result |= mfunc ## f (__VA_ARGS__); \
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result |= mfunc ## d (__VA_ARGS__); \
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result |= mfunc ## ld (__VA_ARGS__); \
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result; \
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})
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#endif
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