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authorUlrich Drepper <drepper@redhat.com>2005-02-21 23:14:10 +0000
committerUlrich Drepper <drepper@redhat.com>2005-02-21 23:14:10 +0000
commit553cc5f9ad5408fc7fb49a33417acc1446f0c548 (patch)
treed4feec607359c614b579876e8035ce539dfac3b8 /string/bits
parent53360aa17295db38e5d5e0ed16548f5f002f0fa2 (diff)
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* sysdeps/unix/sysv/linux/libc_fatal.c: Print backtrace and memory
map if requested. * debug/chk_fail.c: Request backtrace and memory map dump. * Versions.def: Add GLIBC_2.4 for libc. * debug/fgets_chk.c: New file. * debug/fgets_u_chk.c: New file. * debug/getcwd_chk.c: New file. * debug/getwd_chk.c: New file. * debug/readlink_chk.c: New file. * debug/read_chk.c: New file. * debug/pread_chk.c: New file. * debug/pread64_chk.c: New file. * debug/recv_chk.c: New file. * debug/recvfrom_chk.c: New file. * debug/Versions: Add all new functions with version GLIBC_2.4. * debug/Makefile (routines): Add fgets_chk, fgets_u_chk, read_chk, pread_chk, pread64_chk, recv_chk, recvfrom_chk, readlink_chk, getwd_chk, and getcwd_chk. Plus appropriate CFLAGS definitions. * debug/tst-chk1.c: Add more tests. * libio/bits/stdio2.h: Add macros for fgets and fgets_unlocked. * include/stdio.h: Declare __fgets_chk and __fgets_unlocked_chk. * posix/unistd.h: Include <bits/unistd.h> for fortification. * posix/bits/unistd.h: New file. * posix/Makefile (headers): Add bits/unistd.h. * socket/sys/socket.h: Include <bits/socket2.h> for fortification. * socket/bits/socket2.h: New file. * socket/Makefile (headers): Add bits/socket2.h. * string/bits/string3.h: Extend memset macro to check for zero 3rd parameter and use __memset_zero_constant_len_parameter in that case. * sysdeps/generic/memset_chk.c: Add __memset_zero_constant_len_parameter alias and linker warning. * debug/Versions: Add __memset_zero_constant_len_parameter to libc with version GLIBC_2.4. * sysdeps/generic/bits/types.h: Don't unnecessarily use __extension__ in __STD_TYPE definition. 2005-02-21 Jakub Jelinek <jakub@redhat.com> * malloc/malloc.c (malloc_printerr): If MALLOC_CHECK_={5,7}, print the error message rather than program name. 2005-02-21 Ulrich Drepper <drepper@redhat.com>
Diffstat (limited to 'string/bits')
-rw-r--r--string/bits/string3.h17
1 files changed, 13 insertions, 4 deletions
diff --git a/string/bits/string3.h b/string/bits/string3.h
index 87cbe35bb1..8fb66e41c8 100644
--- a/string/bits/string3.h
+++ b/string/bits/string3.h
@@ -1,4 +1,4 @@
-/* Copyright (C) 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2004, 2005 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@@ -80,10 +80,19 @@ __mempcpy_ichk (void *__restrict __dest, const void *__restrict __src,
#endif
+/* The first two tests here help to catch a somewhat common problem
+ where the second and third parameter are transposed. This is
+ especially problematic if the intended fill value is zero. In this
+ case no work is done at all. We detect these problems by referring
+ non-existing functions. */
+extern char *__memset_zero_constant_len_parameter (void *, int, size_t,
+ size_t);
#define memset(dest, ch, len) \
- ((__bos0 (dest) != (size_t) -1) \
- ? __builtin___memset_chk (dest, ch, len, __bos0 (dest)) \
- : __memset_ichk (dest, ch, len))
+ (__builtin_constant_p (len) && (len) == 0 \
+ ? __memset_zero_constant_len_parameter (dest, ch, len, 0) \
+ : ((__bos0 (dest) != (size_t) -1) \
+ ? __builtin___memset_chk (dest, ch, len, __bos0 (dest)) \
+ : __memset_ichk (dest, ch, len)))
static __inline__ void *
__attribute__ ((__always_inline__))
__memset_ichk (void *__dest, int __ch, size_t __len)