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Prevent an implicit int promotion in malloc/tst-alloc_buffer.c

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According to ISO C11, section 6.5.3.3 "Unary arithmetic operators", the
result of the ~ operator is the bitwise complement of its (promoted)
operand.
This can lead to a comparison of a char with another integer type.

Tested on powerpc, powerpc64 and powerpc64le.

	* malloc/tst-alloc_buffer.c (test_misaligned): Cast to char
	before comparing with another char.
This commit is contained in:
Tulio Magno Quites Machado Filho 2017-06-26 09:55:41 -03:00
parent d9660db223
commit d54bb9b1d3
2 changed files with 6 additions and 1 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2017-06-26 Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com>
* malloc/tst-alloc_buffer.c (test_misaligned): Cast to char
before comparing with another char.
2017-06-25 Rical Jasan <ricaljasan@pacific.net> 2017-06-25 Rical Jasan <ricaljasan@pacific.net>
* manual/math.texi: Fix a grammatical error. * manual/math.texi: Fix a grammatical error.

2
malloc/tst-alloc_buffer.c
View File

@ -429,7 +429,7 @@ test_misaligned (char pad)
} }
/* Verify that padding was not overwritten. */ /* Verify that padding was not overwritten. */
TEST_VERIFY (backing[0] == ~pad); TEST_VERIFY (backing[0] == (char) ~pad);
TEST_VERIFY (backing[SIZE + 1] == pad); TEST_VERIFY (backing[SIZE + 1] == pad);
free (backing); free (backing);
} }