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mirror of https://git.savannah.gnu.org/git/gnulib.git synced 2025-08-08 17:22:05 +03:00

fenv-exceptions-tracking-c99: Add tests.

* tests/test-fenv-except-tracking-1.c: New file.
* tests/test-fenv-except-tracking-2.sh: New file.
* tests/test-fenv-except-tracking-2.c: New file.
* tests/test-fenv-except-tracking-3.sh: New file.
* tests/test-fenv-except-tracking-3.c: New file.
* modules/fenv-exceptions-tracking-c99-tests: New file.
This commit is contained in:
Bruno Haible
2023-10-28 18:39:32 +02:00
parent 2ce970a271
commit 09095af14f
7 changed files with 488 additions and 0 deletions

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@@ -1,5 +1,13 @@
2023-10-28 Bruno Haible <bruno@clisp.org> 2023-10-28 Bruno Haible <bruno@clisp.org>
fenv-exceptions-tracking-c99: Add tests.
* tests/test-fenv-except-tracking-1.c: New file.
* tests/test-fenv-except-tracking-2.sh: New file.
* tests/test-fenv-except-tracking-2.c: New file.
* tests/test-fenv-except-tracking-3.sh: New file.
* tests/test-fenv-except-tracking-3.c: New file.
* modules/fenv-exceptions-tracking-c99-tests: New file.
fenv-exceptions-tracking-c99: New module. fenv-exceptions-tracking-c99: New module.
* lib/fenv.in.h (feclearexcept, feraiseexcept, fetestexcept): New * lib/fenv.in.h (feclearexcept, feraiseexcept, fetestexcept): New
declarations. declarations.

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Files:
tests/test-fenv-except-tracking-1.c
tests/test-fenv-except-tracking-2.sh
tests/test-fenv-except-tracking-2.c
tests/test-fenv-except-tracking-3.sh
tests/test-fenv-except-tracking-3.c
tests/macros.h
m4/musl.m4
Depends-on:
fpe-trapping
configure.ac:
gl_MUSL_LIBC
Makefile.am:
TESTS += \
test-fenv-except-tracking-1 \
test-fenv-except-tracking-2.sh \
test-fenv-except-tracking-3.sh
check_PROGRAMS += \
test-fenv-except-tracking-1 \
test-fenv-except-tracking-2 \
test-fenv-except-tracking-3
test_fenv_except_tracking_1_LDADD = $(LDADD) @FENV_EXCEPTIONS_TRACKING_LIBM@
test_fenv_except_tracking_2_LDADD = $(LDADD) @FENV_EXCEPTIONS_TRACKING_LIBM@ @FPE_TRAPPING_LIBM@
test_fenv_except_tracking_3_LDADD = $(LDADD) @FENV_EXCEPTIONS_TRACKING_LIBM@ @FPE_TRAPPING_LIBM@

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/* Test of tracking of floating-point exceptions.
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
/* Specification. */
#include <fenv.h>
#include "macros.h"
static volatile double a, b, c;
int
main ()
{
/* Test setting all exception flags. */
if (feraiseexcept (FE_ALL_EXCEPT) != 0)
{
fputs ("Skipping test: floating-point exceptions are not supported on this machine.\n", stderr);
return 77;
}
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == FE_ALL_EXCEPT
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW));
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing all exception flags. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (fetestexcept (FE_ALL_EXCEPT) == 0);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == 0);
/* Test setting just one exception flag: FE_INVALID. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feraiseexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INVALID);
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == 0);
/* Test setting just one exception flag: FE_DIVBYZERO. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feraiseexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == 0);
/* Test setting just one exception flag: FE_OVERFLOW.
On many architectures, this has the side-effect of also setting FE_INEXACT:
arm64, arm, alpha, hppa, ia64, loongarch64, s390, sh, sparc. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feraiseexcept (FE_OVERFLOW) == 0);
ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_INEXACT) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
/* Test setting just one exception flag: FE_UNDERFLOW.
On many architectures, this has the side-effect of also setting FE_INEXACT:
arm64, arm, alpha, hppa, ia64, loongarch64, s390, sh, sparc. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feraiseexcept (FE_UNDERFLOW) == 0);
ASSERT ((fetestexcept (FE_ALL_EXCEPT) & ~FE_INEXACT) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
/* Test setting just one exception flag: FE_INEXACT. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feraiseexcept (FE_INEXACT) == 0);
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INEXACT);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing just one exception flag: FE_INVALID. */
ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feclearexcept (FE_INVALID) == 0);
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_INVALID)
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_DIVBYZERO | FE_INEXACT | FE_OVERFLOW | FE_UNDERFLOW));
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing just one exception flag: FE_DIVBYZERO. */
ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feclearexcept (FE_DIVBYZERO) == 0);
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_DIVBYZERO)
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_INEXACT | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW));
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing just one exception flag: FE_OVERFLOW. */
ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feclearexcept (FE_OVERFLOW) == 0);
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_OVERFLOW)
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_UNDERFLOW));
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing just one exception flag: FE_UNDERFLOW. */
ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feclearexcept (FE_UNDERFLOW) == 0);
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_UNDERFLOW)
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_DIVBYZERO | FE_INEXACT | FE_INVALID | FE_OVERFLOW));
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
/* Test clearing just one exception flag: FE_INEXACT. */
ASSERT (feraiseexcept (FE_ALL_EXCEPT) == 0);
ASSERT (feclearexcept (FE_INEXACT) == 0);
ASSERT (/* with the libc's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT) == (FE_ALL_EXCEPT & ~FE_INEXACT)
|| /* with gnulib's feraiseexcept(): */
fetestexcept (FE_ALL_EXCEPT)
== (FE_DIVBYZERO | FE_INVALID | FE_OVERFLOW | FE_UNDERFLOW));
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
ASSERT (fetestexcept (FE_INEXACT) == 0);
#if !(defined __arm__ && defined __SOFTFP__)
/* Test the effects of an operation that produces FE_INVALID. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
a = 0; b = 0; c = a / b;
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INVALID);
ASSERT (fetestexcept (FE_INVALID) == FE_INVALID);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == 0);
/* Test the effects of an operation that produces FE_DIVBYZERO. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
a = 3; b = 0; c = a / b;
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == FE_DIVBYZERO);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == 0);
/* Test the effects of an operation that produces FE_OVERFLOW. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
a = 1; for (int i = 0; i < 800; i++) a = 2.0 * a;
b = 1; for (int i = 0; i < 700; i++) b = 2.0 * b;
c = a * b;
{
int exc = fetestexcept (FE_ALL_EXCEPT);
ASSERT ((FE_OVERFLOW & !exc) == 0);
ASSERT ((exc & ~(FE_OVERFLOW | FE_INEXACT)) == 0);
}
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == FE_OVERFLOW);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
/* Test the effects of an operation that produces FE_UNDERFLOW. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
a = 1; for (int i = 0; i < 800; i++) a = 0.5 * a;
b = 1; for (int i = 0; i < 700; i++) b = 0.5 * b;
c = a * b;
{
int exc = fetestexcept (FE_ALL_EXCEPT);
ASSERT ((FE_UNDERFLOW & !exc) == 0);
ASSERT ((exc & ~(FE_UNDERFLOW | FE_INEXACT)) == 0);
}
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == FE_UNDERFLOW);
/* On alpha, this test works only when compiled with the GCC option
'-mieee-with-inexact'. */
# if !defined __alpha
/* Test the effects of an operation that produces FE_INEXACT. */
ASSERT (feclearexcept (FE_ALL_EXCEPT) == 0);
a = 1; b = 3; c = a / b;
ASSERT (fetestexcept (FE_ALL_EXCEPT) == FE_INEXACT);
ASSERT (fetestexcept (FE_INVALID) == 0);
ASSERT (fetestexcept (FE_DIVBYZERO) == 0);
ASSERT (fetestexcept (FE_OVERFLOW) == 0);
ASSERT (fetestexcept (FE_UNDERFLOW) == 0);
ASSERT (fetestexcept (FE_INEXACT) == FE_INEXACT);
# endif
#endif
return 0;
}

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/* Test of tracking of floating-point exceptions.
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
/* Specification. */
#include <fenv.h>
#include <stdio.h>
#include "fpe-trapping.h"
#include "macros.h"
#if HAVE_FPE_TRAPPING
/* Check that triggering a floating-point operation can trigger a trap. */
int
main (int argc, char *argv[])
{
/* Clear FE_INVALID exceptions from past operations. */
feclearexcept (FE_INVALID);
/* An FE_INVALID exception shall trigger a SIGFPE signal, which by default
terminates the program. */
if (sigfpe_on_invalid () < 0)
{
fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
return 77;
}
if (argc > 1)
switch (argv[1][0])
{
case 'f':
{
volatile float a, b;
_GL_UNUSED volatile float c;
a = 0; b = 0; c = a / b;
}
break;
case 'd':
{
volatile double a, b;
_GL_UNUSED volatile double c;
a = 0; b = 0; c = a / b;
}
break;
case 'l':
/* This test does not work on Linux/loongarch64 with glibc 2.37.
Likewise on Linux/alpha with glibc 2.7 on Linux 2.6.26.
Likewise on FreeBSD 12.2/sparc.
Cause unknown. */
#if !((__GLIBC__ >= 2 && defined __loongarch__) \
|| ((__GLIBC__ == 2 && __GLIBC_MINOR__ < 36) && defined __alpha) \
|| (defined __FreeBSD__ && defined __sparc))
{
volatile long double a, b;
_GL_UNUSED volatile long double c;
a = 0; b = 0; c = a / b;
}
#else
fputs ("Skipping test: known failure on this platform\n", stderr);
return 77;
#endif
break;
default:
break;
}
return 0;
}
#else
int
main ()
{
fputs ("Skipping test: feenableexcept or fpsetmask or fp_enable not available\n", stderr);
return 77;
}
#endif

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#!/bin/sh
# Test that a floating-point operation can trigger a trap.
final_rc=0
for arg in f d l; do
${CHECKER} ./test-fenv-except-tracking-2${EXEEXT} $arg
rc=$?
if test $rc = 77; then
final_rc=77
else
if test $rc = 0; then
echo "Failed: ./test-fenv-except-tracking-2 $arg" 1>&2
exit 1
fi
fi
done
exit $final_rc

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/* Test of tracking of floating-point exceptions.
Copyright (C) 2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
/* Specification. */
#include <fenv.h>
#include <stdio.h>
#include "fpe-trapping.h"
#include "macros.h"
/* musl libc does not support floating-point exception trapping, even where
the hardware supports it. See
<https://wiki.musl-libc.org/functional-differences-from-glibc.html> */
#if HAVE_FPE_TRAPPING && (!MUSL_LIBC || GNULIB_FEENABLEEXCEPT)
/* Check that feraiseexcept() can trigger a trap. */
int
main ()
{
/* Clear FE_INVALID exceptions from past operations. */
feclearexcept (FE_INVALID);
/* An FE_INVALID exception shall trigger a SIGFPE signal, which by default
terminates the program. */
if (sigfpe_on_invalid () < 0)
{
fputs ("Skipping test: trapping floating-point exceptions are not supported on this machine.\n", stderr);
return 77;
}
feraiseexcept (FE_INVALID);
return 0;
}
#else
int
main ()
{
fputs ("Skipping test: feenableexcept or fpsetmask or fp_enable not available\n", stderr);
return 77;
}
#endif

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#!/bin/sh
# Test that feraiseexcept() can trigger a trap.
final_rc=0
${CHECKER} ./test-fenv-except-tracking-3${EXEEXT}
rc=$?
if test $rc = 77; then
final_rc=77
else
if test $rc = 0; then
echo "Failed: ./test-fenv-except-tracking-3" 1>&2
exit 1
fi
fi
exit $final_rc