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Update.
1998-03-18 Andreas Jaeger <aj@arthur.rhein-neckar.de> * manual/memory.texi (Heap Consistency Checking): Document MALLOC_CHECK_. Based on a text by Wolfram Gloger. 1998-03-18 17:11 Zack Weinberg <zack@rabi.phys.columbia.edu> * manual/Makefile: Add missing rules. 1998-03-18 Ulrich Drepper <drepper@cygnus.com> * timezone/Makefile (generated): Define to remove all stamp files. * sysdeps/generic/strsep.c: Also undefine __strsep. * string/strdup.c: Undefine __strdup and strdup first. * string/strndup.c: Likewise. * string/bits/string2.h: Correct strtok_r and strsep. Add strndup optimization. * sysdeps/generic/strsep.c: Little optimization.
This commit is contained in:
Ulrich Drepper
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23
ChangeLog
23
ChangeLog
@ -1,3 +1,26 @@
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1998-03-18 Andreas Jaeger <aj@arthur.rhein-neckar.de>
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* manual/memory.texi (Heap Consistency Checking): Document
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MALLOC_CHECK_. Based on a text by Wolfram Gloger.
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1998-03-18 17:11 Zack Weinberg <zack@rabi.phys.columbia.edu>
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* manual/Makefile: Add missing rules.
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1998-03-18 Ulrich Drepper <drepper@cygnus.com>
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* timezone/Makefile (generated): Define to remove all stamp files.
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* sysdeps/generic/strsep.c: Also undefine __strsep.
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* string/strdup.c: Undefine __strdup and strdup first.
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* string/strndup.c: Likewise.
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* string/bits/string2.h: Correct strtok_r and strsep.
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Add strndup optimization.
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* sysdeps/generic/strsep.c: Little optimization.
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1998-03-18 14:25 Ulrich Drepper <drepper@cygnus.com>
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* string/bits/string2.h: Add optimization for strdup.
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16
FAQ.in
16
FAQ.in
@ -55,9 +55,9 @@ and the many mirror sites. ftp.gnu.org is always overloaded, so try to find
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a local mirror first.
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You always should try to use the latest official release. Older
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versions may not have all the features GNU libc requires. On most
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supported platforms (for powerpc see question ?powerpc), 2.7.2.3 is
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the earliest version that works at all.
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versions may not have all the features GNU libc requires. The current
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releases of egcs (1.0.2) and GNU CC (2.8.1) should work with the GNU C
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library (for powerpc see question ?powerpc).
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?? When I try to compile glibc I get only error messages.
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What's wrong?
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@ -83,7 +83,7 @@ Always get the newest release of GNU binutils available. Older
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releases are known to have bugs that prevent a successful compilation.
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{ZW} As of release 2.1 a linker supporting symbol versions is
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required. For Linux, get binutils-2.8.1.0.17 or later. Other systems
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required. For Linux, get binutils-2.8.1.0.23 or later. Other systems
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may have native linker support, but it's moot right now, because glibc
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has not been ported to them.
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@ -481,9 +481,9 @@ GROUP ( libc.so.6 ld-linux.so.2 libc.a )
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?? How can I compile gcc 2.7.2.1 from the gcc source code using
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glibc 2.x?
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{AJ} There's only correct support for glibc 2.0.x in gcc 2.7.2.3
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or later. You should get at least gcc 2.7.2.3. All previous versions
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had problems with glibc support.
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{AJ} There's only correct support for glibc 2.0.x in gcc 2.7.2.3 or
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later. But you should get at least gcc 2.8.1 or egcs 1.0.2 (or later
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versions) instead.
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?? The `gencat' utility cannot process the catalog sources which
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were used on my Linux libc5 based system. Why?
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@ -620,7 +620,7 @@ problem.
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?? What do I need for C++ development?
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{HJ,AJ} You need either egcs 1.0.1 or gcc-2.8.1 with libstdc++
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{HJ,AJ} You need either egcs 1.0.2 or gcc-2.8.1 with libstdc++
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2.8.1 (or more recent versions). libg++ 2.7.2 (and the Linux Versions
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2.7.2.x) doesn't work very well with the GNU C library due to vtable thunks.
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If you're upgrading from glibc 2.0.x to 2.1 you have to recompile
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@ -69,6 +69,12 @@ endef
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libc.dvi libc.info: $(chapters) summary.texi $(chapters-incl)
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libc.dvi: texinfo.tex
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%.info: %.texinfo
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$(MAKEINFO) $<
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%.dvi: %.texinfo
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$(TEXI2DVI) $<
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# Generate the summary from the Texinfo source files for each chapter.
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summary.texi: stamp-summary ;
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stamp-summary: summary.awk $(chapters) $(chapters-incl)
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@ -81,7 +87,7 @@ stamp-summary: summary.awk $(chapters) $(chapters-incl)
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# Generate a file which can be added to the `dir' content to provide direct
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# access to the documentation of the function, variables, and other
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# definitions.
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dir-add.texi: xtract-typefun.awk $(chapters) $(chapters-incl)
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dir-add.texinfo: xtract-typefun.awk $(chapters) $(chapters-incl)
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(echo "@dircategory GNU C library functions"; \
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echo "@direntry"; \
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$(GAWK) -f $^ | sort; \
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@ -611,6 +611,20 @@ The block was already freed.
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@end table
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@end deftp
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Another possibility to check for and guard against bugs in the use of
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@code{malloc}, @code{realloc} and @code{free} is to set the environment
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variable @code{MALLOC_CHECK_}. When @code{MALLOC_CHECK_} is set, a
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special (less efficient) implementation is used which is designed to be
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tolerant against simple errors, such as double calls of @code{free} with
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the same argument, or overruns of a single byte (off-by-one bugs). Not
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all such errors can be proteced against, however, and memory leaks can
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result. If @code{MALLOC_CHECK_} is set to @code{0}, any detected heap
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corruption is silently ignored; if set to @code{1}, a diagnostic is
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printed on @code{stderr}; if set to @code{2}, @code{abort} is called
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immediately. This can be useful because otherwise a crash may happen
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much later, and the true cause for the problem is then very hard to
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track down.
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@node Hooks for Malloc
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@subsection Storage Allocation Hooks
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@cindex allocation hooks, for @code{malloc}
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@ -710,8 +710,8 @@ strnlen (__const char *__string, size_t __maxlen)
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? (((__const unsigned char *) (sep))[0] != '\0' \
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&& ((__const unsigned char *) (sep))[1] == '\0' \
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? __strtok_r_1c (s, ((__const char *) (sep))[0], nextp) \
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: strtok_r (s, sep, nextp)) \
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: strtok_r (s, sep, nextp)))
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: __strtok_r (s, sep, nextp)) \
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: __strtok_r (s, sep, nextp)))
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__STRING_INLINE char *__strtok_r_1c (char *__s, char __sep, char **__nextp);
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__STRING_INLINE char *
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@ -740,7 +740,7 @@ __strtok_r_1c (char *__s, char __sep, char **__nextp)
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return __result;
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}
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# if defined __USE_POSIX || defined __USE_MISC
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# define strtok_r(s, sep, nextp) __strtok_r (s, sep, nextp)
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# define strtok_r(s, sep, nextp) __strtok_r ((s), (sep), (nextp))
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# endif
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#endif
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@ -845,7 +845,7 @@ __strsep_g (char **__s, __const char *__reject)
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return __retval;
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}
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# ifdef __USE_BSD
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# define strsep(s, reject) __strsep (s, reject)
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# define strsep(s, reject) __strsep ((s), (reject))
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# endif
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#endif
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@ -857,15 +857,15 @@ __strsep_g (char **__s, __const char *__reject)
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# include <stdlib.h>
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# define __strdup(s) \
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(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s)
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? (((__const unsigned char *) (s))[0] == '\0'
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? return (char *) calloc (1, 1);
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: ({ size_t len = strlen (s) + 1;
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char *retval = (char *) malloc (len);
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if (retval != NULL)
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retval = (char *) memcpy (retval, s, len);
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retval; }))
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: strdup (s)))
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(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
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? (((__const unsigned char *) (s))[0] == '\0' \
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? (char *) calloc (1, 1) \
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: ({ size_t __len = strlen (s) + 1; \
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char *__retval = (char *) malloc (__len); \
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if (__retval != NULL) \
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__retval = (char *) memcpy (__retval, s, __len); \
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__retval; })) \
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: __strdup (s)))
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# if defined __USE_SVID || defined __USE_BSD || defined __USE_XOPEN_EXTENDED
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# define strdup(s) __strdup (s)
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@ -873,6 +873,37 @@ __strsep_g (char **__s, __const char *__reject)
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#endif
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#if !defined _HAVE_STRING_ARCH_strndup && !defined __STRICT_ANSI__
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/* We need the memory allocation functions. Including this header is
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not allowed. */
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# include <stdlib.h>
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# define __strndup(s, n) \
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(__extension__ (__builtin_constant_p (s) && __string2_1bptr_p (s) \
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? (((__const unsigned char *) (s))[0] == '\0' \
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? (char *) calloc (1, 1) \
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: ({ size_t __len = strlen (s) + 1; \
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size_t __n = (n); \
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char *__retval; \
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if (__n < __len) \
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__len = __n; \
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__retval = (char *) malloc (__len); \
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if (__retval != NULL) \
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{ \
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__retval[__len - 1] = '\0'; \
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__retval = (char *) memcpy (__retval, s, \
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__len - 1); \
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} \
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__retval; })) \
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: __strndup ((s), (n))))
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# ifdef __GNU_SOURCE
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# define strndup(s, n) __strndup ((s), (n))
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# endif
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#endif
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#undef __STRING_INLINE
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#endif /* No string inlines. */
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@ -1,4 +1,4 @@
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/* Copyright (C) 1991, 1996, 1997 Free Software Foundation, Inc.
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/* Copyright (C) 1991, 1996, 1997, 1998 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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@ -28,6 +28,9 @@ char *malloc ();
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char *memcpy ();
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#endif
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#undef __strdup
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#undef strdup
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#ifndef weak_alias
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# define __strdup strdup
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#endif
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@ -1,4 +1,4 @@
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/* Copyright (C) 1996, 1997 Free Software Foundation, Inc.
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/* Copyright (C) 1996, 1997, 1998 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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@ -30,6 +30,9 @@
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char *malloc ();
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#endif
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#undef __strndup
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#undef strndup
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#ifndef weak_alias
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# define __strndup strndup
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#endif
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@ -18,6 +18,7 @@
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#include <string.h>
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#undef __strsep
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#undef strsep
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char *
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@ -43,7 +44,7 @@ __strsep (char **stringp, const char *delim)
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if (*begin == ch)
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end = begin;
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else
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end = strchr (begin, delim[0]);
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end = strchr (begin + 1, ch);
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}
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}
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else
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@ -39,6 +39,7 @@ tzfiles := $(tzbases) $(tzlinks)
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# northamerica.
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distribute += $(tzfiles) leapseconds pacificnew simplebackw
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generated := $(addprefix z.,$(tzfiles))
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install-sbin := zic zdump
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generated-dirs = testdata
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