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365f05c7a5
Building the testsuite with -Wextra (together with -Wno-cast-function-type -Wno-clobbered -Wno-expansion-to-defined -Wno-missing-field-initializers -Wno-old-style-declaration -Wno-shift-negative-value -Wno-sign-compare -Wno-type-limits -Wno-unused-parameter, which reflect the set of -Wextra warnings for which glibc itself is not currently clean on x86_64) showed up implicit-fallthrough warnings in tst-setjmp.c. Those warnings appear to be false positives, arising from a function "jump" that calls longjmp not itself being marked as noreturn; thus, this patch adds the noreturn marking to that function to fix the warnings. Tested for x86_64. * setjmp/tst-setjmp.c (jump): Use __attribute__ ((__noreturn__)).
121 lines
2.6 KiB
C
121 lines
2.6 KiB
C
/* Copyright (C) 1991-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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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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#include <stdio.h>
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#include <setjmp.h>
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#include <stdlib.h>
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static jmp_buf env;
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static int last_value = -1, lose = 0;
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static __attribute__ ((__noreturn__)) void
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jump (int val)
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{
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longjmp (env, val);
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}
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static int
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do_test (void)
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{
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int value;
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value = setjmp (env);
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if (value != last_value + 1)
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{
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fputs("Shouldn't have ", stdout);
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lose = 1;
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}
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last_value = value;
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switch (value)
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{
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case 0:
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puts("Saved environment.");
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jump (0);
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default:
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printf ("Jumped to %d.\n", value);
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if (value < 10)
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jump (value + 1);
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}
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if (!lose && value == 10)
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{
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/* Do a second test, this time without `setjmp' being a macro.
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This is not required by ISO C but we have this for compatibility. */
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#undef setjmp
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extern int setjmp (jmp_buf);
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last_value = -1;
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lose = 0;
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value = setjmp (env);
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if (value != last_value + 1)
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{
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fputs("Shouldn't have ", stdout);
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lose = 1;
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}
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last_value = value;
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switch (value)
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{
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case 0:
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puts("Saved environment.");
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jump (0);
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default:
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printf ("Jumped to %d.\n", value);
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if (value < 10)
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jump (value + 1);
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}
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}
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if (!lose && value == 10)
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{
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/* And again for the `_setjmp' function. */
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#ifndef _setjmp
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extern int _setjmp (jmp_buf);
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#endif
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last_value = -1;
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lose = 0;
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value = _setjmp (env);
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if (value != last_value + 1)
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{
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fputs("Shouldn't have ", stdout);
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lose = 1;
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}
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last_value = value;
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switch (value)
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{
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case 0:
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puts("Saved environment.");
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jump (0);
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default:
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printf ("Jumped to %d.\n", value);
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if (value < 10)
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jump (value + 1);
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}
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}
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if (lose || value != 10)
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puts ("Test FAILED!");
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else
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puts ("Test succeeded!");
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return lose ? EXIT_FAILURE : EXIT_SUCCESS;
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}
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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