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bf9688e623
When passed a pointer to a zero-sized struct, the access attribute without the third argument misleads -Wstringop-overflow diagnostics to think that a function is writing 1 byte into the zero-sized structs. The attribute doesn't add that much value in this context, so drop it completely for _FORTIFY_SOURCE=3. Resolves: BZ #31383 Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org> Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
40 lines
1.3 KiB
C
40 lines
1.3 KiB
C
/* read smoke test for 0-sized structures.
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Copyright The GNU Toolchain Authors.
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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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<https://www.gnu.org/licenses/>. */
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/* Zero-sized structures should not result in any overflow warnings or
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errors when fortification is enabled. */
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#include <fcntl.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <support/check.h>
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int
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do_test (void)
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{
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struct test_st {} test_info[16];
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int fd = open ("/dev/zero", O_RDONLY, 0);
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if (fd == -1)
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FAIL_UNSUPPORTED ("Unable to open /dev/zero: %m");
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TEST_VERIFY_EXIT (read (fd, test_info, sizeof(test_info)) == 0);
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return 0;
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}
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#include <support/test-driver.c>
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