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Fix BZ #16734 -- fopen calls mmap to allocate its buffer

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This commit is contained in:
Paul Pluzhnikov
2015-08-12 18:56:08 -07:00
parent 84895dca70
commit 8a29509dd9
8 changed files with 36 additions and 55 deletions
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40
libio/libioP.h
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@@ -760,46 +760,6 @@ extern _IO_off64_t _IO_seekpos_unlocked (_IO_FILE *, _IO_off64_t, int)
# define munmap __munmap
# define ftruncate __ftruncate
# endif
# define ROUND_TO_PAGE(_S) \
(((_S) + EXEC_PAGESIZE - 1) & ~(EXEC_PAGESIZE - 1))
# define FREE_BUF(_B, _S) \
munmap ((_B), ROUND_TO_PAGE (_S))
# define ALLOC_BUF(_B, _S, _R) \
do { \
(_B) = (char *) mmap (0, ROUND_TO_PAGE (_S), \
PROT_READ | PROT_WRITE, \
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
if ((_B) == (char *) MAP_FAILED) \
return (_R); \
} while (0)
# define ALLOC_WBUF(_B, _S, _R) \
do { \
(_B) = (wchar_t *) mmap (0, ROUND_TO_PAGE (_S), \
PROT_READ | PROT_WRITE, \
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); \
if ((_B) == (wchar_t *) MAP_FAILED) \
return (_R); \
} while (0)
#else /* _G_HAVE_MMAP */
# define FREE_BUF(_B, _S) \
free(_B)
# define ALLOC_BUF(_B, _S, _R) \
do { \
(_B) = (char*)malloc(_S); \
if ((_B) == NULL) \
return (_R); \
} while (0)
# define ALLOC_WBUF(_B, _S, _R) \
do { \
(_B) = (wchar_t *)malloc(_S); \
if ((_B) == NULL) \
return (_R); \
} while (0)
#endif /* _G_HAVE_MMAP */
#ifndef OS_FSTAT