Update.cvs/libc-ud-970813

1997-08-14 03:14  Ulrich Drepper  <drepper@cygnus.com>

	* elf/dl-minimal.c: Don't use relative #include paths.
	(malloc): Don't try to initialize _dl_pagesize, it already is.
	(__sigjmp_save, longjmp): Reformat.

	* sysdeps/generic/dl-sysdep.c: Implement _dl_show_auxv function to
	show content of auxiliary array.
	(_dl_sysdep_start): Remember start of auxiliary vector.
	* sysdeps/mach/hurd/dl-sysdep.c: (_dl_show_auxv): New dummy function.
	* elf/link.h: Add prototype for _dl_show_auxv.
	* elf/rtld.c (dl_main): Call _dl_show_auxv if LD_SHOW_AUXV envvar
	is present.

	* libio/iofdopen.c: Better prepare for use in libstdc++.
	* libio/iofflush.c: Likewise.
	* libio/iofgetpos.c: Likewise.
	* libio/iofgets.c: Likewise.
	* libio/iofopen.c: Likewise.
	* libio/iofputs.c: Likewise.
	* libio/iofread.c: Likewise.
	* libio/iofsetpos.c: Likewise.
	* libio/ioftell.c: Likewise.
	* libio/iofwrite.c: Likewise.
	* libio/iogetdelim.c: Likewise.
	* libio/iogets.c: Likewise.
	* libio/iopopen.c: Likewise.
	* libio/ioputs.c: Likewise.
	* libio/iosetbuffer.c: Likewise.
	* libio/iosetvbuf.c: Likewise.
	* libio/ioungetc.c: Likewise.
	* libio/iovsprintf.c: Likewise.
	* libio/iovsscanf.c: Likewise.

	* manual/creature.texi: Mention _XOPEN_SOURCE_EXTENDED in correct
	place.

	* manual/math.texi: Add comment to sincos decsription to say it's a
	GNU extension.
	Fix description of random function.

	* posix/fnmatch.h: Recognize Windog by _WINDOWS32 not WIN32.
	* posix/glob.c: Likewise.  Handle stupid system headers on SunOS.
	Add casts for all __alloca calls.
	* posix/glob.h: Recognize Windog by _WINDOWS32 not WIN32.
	Declare additional GLOB_* constants also if _GNU_SOURCE is defined.
	Patches by Paul D. Smith <psmith@BayNetworks.COM>.

	* stdio-common/_itoa.c: Don't use relateive #include paths.

	* sysdeps/i386/fpu/bits/mathinline.h: Enable optimizations even for
	gcc 2.7.
	(atan): Loading 1.0 from memory does not pay off.
	(asinh): Fix typo.

1997-08-13 09:44  Philip Blundell  <Philip.Blundell@pobox.com>

	* sysdeps/stub/accept.c: Use socklen_t where necessary.
	* sysdeps/stub/bind.c: Likewise.
	* sysdeps/stub/connect.c: Likewise.
	* sysdeps/stub/getsockname.c: Likewise.
	* sysdeps/stub/getsockopt.c: Likewise.
	* sysdeps/stub/recvfrom.c: Likewise.
	* sysdeps/stub/sendto.c: Likewise.
	* sysdeps/stub/setsockopt.c: Likewise.

1997-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* io/ftw.c (object_compare): Avoid memcmp when comparing scalar
	types.

1997-08-12  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* math/libm-test.c (cbrt_test): Add epsilon for long double to
	`cbrt (-0.001)'.

1997-08-11  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* sysdeps/stub/bits/string.h: Fix comment.

1997-08-01  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* elf/Makefile (routines): Remove dl-version.
	(dl-routines): Add it here instead.  This removes dead code from
	libc.so.

1997-08-12 17:17  Wolfram Gloger  <wmglo@dent.med.uni-muenchen.de>

	* malloc/thread-m.h (thread_atfork, thread_atfork_static): New
	macros to encapsulate pthread_atfork's functionality.
	* malloc/malloc.c (ptmalloc_lock_all, ptmalloc_unlock_all): New
	functions, registered via thread_atfork in the initialization
	routine or via thread_atfork_static in global scope.  This
	ensures a consistent state of all locks across fork().

1997-08-11 23:00:32 1997  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/programs/xtmp.c (compare_entry):
	Partially undo patch made by Klaus Espenlaub.  There
	was no xtmp/utmp typo.  Added comment to cclarify this.
	* login/programs/xtmp.h: Likewise.

	* posix/getopt.c: Recognize Windog by _WINDOWS32 not WIN32.
	Patch by Paul D. Smith <psmith@BayNetworks.COM>.

1997-08-12 13:51  Ulrich Drepper  <drepper@cygnus.com>

	* login/getutid.c: Rename to __getutid and make getutid and getutxid
	weak aliases.
	Patch by ir. Mark M._Kettenis <kettenis@phys.uva.nl>.

1997-08-11 23:55  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/Makefile [subdir=misc] (sysdep_headers):
	Add bits/mman.h.

1997-08-11 08:51:21 1997  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* stdlib/fmtmsg.c (fmtmsg): Add static to
	__libc_once_define macro.

	* libc.map (__progname_full, __progname): Added.

1997-08-04 08:31  H.J. Lu  <hjl@gnu.ai.mit.edu>

	* sysdeps/unix/sysv/linux/if_index.c (if_nametoindex): Return 0
	if SIOGIFINDEX is not defined.
	(if_indextoname): Initialize "result" to NULL.
	(if_nametoindex, if_nameindex): Fix ENOSYS setting.

1997-08-11 11:58  Richard Henderson  <rth@cygnus.com>

	Sparc ISO C 9x exception handling:
	* sysdeps/sparc/fpu/bits/mathdef.h: New file.
	* sysdeps/sparc/fpu/fclrexcpt.c: New file.
	* sysdeps/sparc/fpu/fegetenv.c: New file.
	* sysdeps/sparc/fpu/fegetround.c: New file.
	* sysdeps/sparc/fpu/feholdexcpt.c: New file.
	* sysdeps/sparc/fpu/fesetenv.c: New file.
	* sysdeps/sparc/fpu/fesetround.c: New file.
	* sysdeps/sparc/fpu/feupdateenv.c: New file.
	* sysdeps/sparc/fpu/fgetexcptflg.c: New file.
	* sysdeps/sparc/fpu/fraiseexcpt.c: New file.
	* sysdeps/sparc/fpu/fsetexcptflg.c: New file.
	* sysdeps/sparc/fpu/ftestexcept.c: New file.
	* sysdeps/sparc/sparc32/fpu/bits/fenv.h: New file.
	* sysdeps/sparc/sparc64/fpu/bits/fenv.h: New file.

1997-08-11 11:58  Richard Henderson  <rth@cygnus.com>

	Sparc64 merge:
	* configure.in: Change up subdirectories, rename sparc8->sparcv8.

	* csu/Makefile: Nuke need-nopic-initfini bits.  The problem was
	that sparc64 ld did not recognize pic relocs at all.

	* elf/dl-deps.c: Include <string.h>.
	* elf/do-rel.h (elf_dynamic_do_rel): Take reloc address and size
	directly instead of the DT names to get them from.
	* elf/dynamic-link.h (_ELF_DYNAMIC_DO_RELOC): New macro distilled
	from ELF_DYNAMIC_DO_REL{,A}.  Define a second version that accounts
	for the possibility that DT_RELA and DT_JMPPLT overlap, as such is
	the case on the Sparc.

	* elf/elf.h: Stub out Elf64_Ver*, and make them the same as the
	Elf32_Ver* bits.  The linker does not even know to differentiate
	between the word sizes.  Someone should examine this and figure
	out what the proper sizes of things should be for 64-bit hosts
	before the sparc64 libraries are distributed.

	* shlib-versions: Rename sparc64 ld.so to not conflict with sparc32
	on the same machine.

	Move old sysdeps/sparc contents to sysdeps/sparc/sparc32,
	rename sparc8 subdir to sparcv8, move sysdeps/sparc64 content to
	sysdeps/sparc/sparc64.  Same for sysdeps/unix/sysv/linux/sparc.

	* sysdeps/sparc/Implies: Do ieee754 here.
	* sysdeps/sparc/configure.in: Move from sparc32/.
	* sysdeps/sparc/sparc32/Implies: Do wordsize here.
	* sysdeps/sparc/sparc64/Implies: Likewise.

	* sysdeps/sparc/sparc32/dl-machine.h (elf_machine_load_address):
	Use uninitialized .got to find load address instead of AT_BASE, as
	the later does not exist when running ld.so directly.

	* sysdeps/sparc/sparc32/fpu/fpu_control.h: Move from ../.
	* sysdeps/sparc/sparc64/fpu/fpu_control.h: Likewise.

	* sysdeps/sparc/sparc32/udiv_qrnnd.S: Clean up PIC support.

	* sysdeps/sparc/sparc64/Makefile (sysdep_routines): Add s_finitel
	and s_signbitl for stdio.
	* sysdeps/sparc/sparc64/configure.in: Remove, we no longer need
	nopic_initfini.

	* sysdeps/sparc/sparc64/bsd-_setjmp.S: Remove.
	* sysdeps/sparc/sparc64/bsd-setjmp.S: Remove.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bsd-_setjmp.S: New empty file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/bsd-setjmp.S: New empty file.
	* sysdeps/unix/sysv/linux/sparc/sparc64/longjmp.S: Add __longjmp alias.
	* sysdeps/unix/sysv/linux/sparc/sparc64/setjmp.S: Add weak _setjmp
	and setjmp entry points.

	* sysdeps/sparc/sparc64/dl-machine.h: Finish real implementation.

	* sysdeps/sparc/sparc64/elf/crtbegin.S: Add copyright, fix PIC.
	* sysdeps/sparc/sparc64/elf/crtend.S: Likewise.

	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h (struct sigaction):
	Fix sa_flags size for sparc64; add sa_restorer for kernel.

	* sysdeps/unix/sysv/linux/sparc/sparc64/brk.S: Fix PIC.
	* sysdeps/unix/sysv/linux/sparc/sparc64/clone.S: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/init-first.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h: Likewise.

	* sysdeps/unix/sysv/linux/sparc/sparc64/syscall.S: New file.

1997-08-10 18:29:08 1997  Mark Kettenis  <kettenis@phys.uva.nl>

	* login/login.c (login): Check for correct return value of
	utmpname.

1997-08-11 16:49  Ulrich Drepper  <drepper@cygnus.com>

	* time/tzset.c (__tzset_internal): Correctly handle TZ strings
	following incorrect old POSIX specs.
	Patch by Paul Eggert <eggert@twinsun.com>.

	* sysdeps/generic/bits/sigaction.h: Correct comment for SA_RESTART.
	* sysdeps/unix/bsd/osf/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/alpha/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/mips/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/linux/sparc/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/minix/bits/sigaction.h: Likewise.
	* sysdeps/unix/sysv/sysv4/bits/sigaction.h: Likewise.
	Reported by NIIBE Yutaka <gniibe@mri.co.jp>.

1997-08-09  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* manual/math.texi: Define the macros @mul and @infinity and use
	them to format the multiplication and infinity signs.
	(FP Comparison Functions): Use @code, not @math, for C code
	examples.

	* elf/dl-profile.c: Add descriptions and implement reading of

2 files changed, 143 insertions, 2 deletions

diff --git a/malloc/malloc.c b/malloc/malloc.c
index 1a5c886..fb51483 100644
--- a/malloc/malloc.c
+++ b/malloc/malloc.c
@@ -1185,6 +1185,8 @@ static Void_t*   realloc_check(Void_t* oldmem, size_t bytes);
 static Void_t*   memalign_check(size_t alignment, size_t bytes);
 static Void_t*   malloc_starter(size_t sz);
 static void      free_starter(Void_t* mem);
+static Void_t*   malloc_atfork(size_t sz);
+static void      free_atfork(Void_t* mem);
 #endif
 
 #else
@@ -1204,6 +1206,8 @@ static Void_t*   realloc_check();
 static Void_t*   memalign_check();
 static Void_t*   malloc_starter();
 static void      free_starter();
+static Void_t*   malloc_atfork();
+static void      free_atfork();
 #endif
 
 #endif
@@ -1510,6 +1514,58 @@ static unsigned long max_mmapped_mem = 0;
 int __malloc_initialized = 0;
 
 
+/* The following two functions are registered via thread_atfork() to
+   make sure that the mutexes remain in a consistent state in the
+   fork()ed version of a thread.  Also adapt the malloc and free hooks
+   temporarily, because the `atfork' handler mechanism may use
+   malloc/free internally (e.g. in LinuxThreads). */
+
+#if defined(_LIBC) || defined(MALLOC_HOOKS)
+static __malloc_ptr_t (*save_malloc_hook) __MALLOC_P ((size_t __size));
+static void           (*save_free_hook) __MALLOC_P ((__malloc_ptr_t __ptr));
+static Void_t*        save_arena;
+#endif
+
+static void
+ptmalloc_lock_all __MALLOC_P((void))
+{
+  arena *ar_ptr;
+
+  (void)mutex_lock(&list_lock);
+  for(ar_ptr = &main_arena;;) {
+    (void)mutex_lock(&ar_ptr->mutex);
+    ar_ptr = ar_ptr->next;
+    if(ar_ptr == &main_arena) break;
+  }
+#if defined(_LIBC) || defined(MALLOC_HOOKS)
+  save_malloc_hook = __malloc_hook;
+  save_free_hook = __free_hook;
+  __malloc_hook = malloc_atfork;
+  __free_hook = free_atfork;
+  /* Only the current thread may perform malloc/free calls now. */
+  tsd_getspecific(arena_key, save_arena);
+  tsd_setspecific(arena_key, (Void_t*)0);
+#endif
+}
+
+static void
+ptmalloc_unlock_all __MALLOC_P((void))
+{
+  arena *ar_ptr;
+
+#if defined(_LIBC) || defined(MALLOC_HOOKS)
+  tsd_setspecific(arena_key, save_arena);
+  __malloc_hook = save_malloc_hook;
+  __free_hook = save_free_hook;
+#endif
+  for(ar_ptr = &main_arena;;) {
+    (void)mutex_unlock(&ar_ptr->mutex);
+    ar_ptr = ar_ptr->next;
+    if(ar_ptr == &main_arena) break;
+  }
+  (void)mutex_unlock(&list_lock);
+}
+
 /* Initialization routine. */
 #if defined(_LIBC)
 #if 0
@@ -1524,8 +1580,6 @@ ptmalloc_init __MALLOC_P((void))
 #endif
 {
 #if defined(_LIBC) || defined(MALLOC_HOOKS)
-  __malloc_ptr_t (*save_malloc_hook) __MALLOC_P ((size_t __size));
-  void (*save_free_hook) __MALLOC_P ((__malloc_ptr_t __ptr));
   const char* s;
 #endif
 
@@ -1550,6 +1604,7 @@ ptmalloc_init __MALLOC_P((void))
   mutex_init(&list_lock);
   tsd_key_create(&arena_key, NULL);
   tsd_setspecific(arena_key, (Void_t *)&main_arena);
+  thread_atfork(ptmalloc_lock_all, ptmalloc_unlock_all, ptmalloc_unlock_all);
 #endif
 #if defined(_LIBC) || defined(MALLOC_HOOKS)
   if((s = getenv("MALLOC_TRIM_THRESHOLD_")))
@@ -1572,6 +1627,12 @@ ptmalloc_init __MALLOC_P((void))
 #endif
 }
 
+/* There are platforms (e.g. Hurd) with a link-time hook mechanism. */
+#ifdef thread_atfork_static
+thread_atfork_static(ptmalloc_lock_all, ptmalloc_unlock_all, \
+                     ptmalloc_unlock_all)
+#endif
+
 #if defined(_LIBC) || defined(MALLOC_HOOKS)
 
 /* Hooks for debugging versions.  The initial hooks just call the
@@ -4240,6 +4301,65 @@ free_starter(mem) Void_t* mem;
   chunk_free(&main_arena, p);
 }
 
+/* The following hooks are used while the `atfork' handling mechanism
+   is active. */
+
+static Void_t*
+#if __STD_C
+malloc_atfork(size_t sz)
+#else
+malloc_atfork(sz) size_t sz;
+#endif
+{
+  Void_t *vptr = NULL;
+
+  tsd_getspecific(arena_key, vptr);
+  if(!vptr) {
+    mchunkptr victim = chunk_alloc(&main_arena, request2size(sz));
+    return victim ? chunk2mem(victim) : 0;
+  } else {
+    /* Suspend the thread until the `atfork' handlers have completed.
+       By that time, the hooks will have been reset as well, so that
+       mALLOc() can be used again. */
+    (void)mutex_lock(&list_lock);
+    (void)mutex_unlock(&list_lock);
+    return mALLOc(sz);
+  }
+}
+
+static void
+#if __STD_C
+free_atfork(Void_t* mem)
+#else
+free_atfork(mem) Void_t* mem;
+#endif
+{
+  Void_t *vptr = NULL;
+  arena *ar_ptr;
+  mchunkptr p;                          /* chunk corresponding to mem */
+
+  if (mem == 0)                              /* free(0) has no effect */
+    return;
+
+  p = mem2chunk(mem);
+
+#if HAVE_MMAP
+  if (chunk_is_mmapped(p))                       /* release mmapped memory. */
+  {
+    munmap_chunk(p);
+    return;
+  }
+#endif
+
+  ar_ptr = arena_for_ptr(p);
+  tsd_getspecific(arena_key, vptr);
+  if(vptr)
+    (void)mutex_lock(&ar_ptr->mutex);
+  chunk_free(ar_ptr, p);
+  if(vptr)
+    (void)mutex_unlock(&ar_ptr->mutex);
+}
+
 #endif /* defined(_LIBC) || defined(MALLOC_HOOKS) */
 
 
diff --git a/malloc/thread-m.h b/malloc/thread-m.h
index 9afd058..24d95df 100644
--- a/malloc/thread-m.h
+++ b/malloc/thread-m.h
@@ -26,6 +26,8 @@
 #ifndef _THREAD_M_H
 #define _THREAD_M_H
 
+#undef thread_atfork_static
+
 #if defined(_LIBC) /* The GNU C library, a special case of Posix threads */
 
 #include <bits/libc-lock.h>
@@ -65,6 +67,9 @@ static Void_t *malloc_key_data;
 #define mutex_unlock(m)		\
    (__pthread_mutex_unlock != NULL ? __pthread_mutex_unlock (m) : 0)
 
+#define thread_atfork(prepare, parent, child) \
+   (__pthread_atfork != NULL ? __pthread_atfork(prepare, parent, child) : 0)
+
 #elif defined(MUTEX_INITIALIZER)
 /* Assume hurd, with cthreads */
 
@@ -95,6 +100,12 @@ static int tsd_keys_alloced = 0;
 #define tsd_getspecific(key, vptr) \
   ((vptr) = (void *)*__hurd_threadvar_location (_HURD_THREADVAR_MALLOC))
 
+#define thread_atfork(prepare, parent, child) do {} while(0)
+#define thread_atfork_static(prepare, parent, child) \
+ text_set_element(_hurd_fork_prepare_hook, prepare); \
+ text_set_element(_hurd_fork_parent_hook, parent); \
+ text_set_element(_hurd_fork_child_hook, child);
+
 /* No we're *not* using pthreads.  */
 #define __pthread_initialize ((void (*)(void))0)
 
@@ -126,6 +137,10 @@ typedef pthread_key_t tsd_key_t;
 #define tsd_setspecific(key, data) pthread_setspecific(key, data)
 #define tsd_getspecific(key, vptr) (vptr = pthread_getspecific(key))
 
+/* at fork */
+#define thread_atfork(prepare, parent, child) \
+                                   pthread_atfork(prepare, parent, child)
+
 #elif USE_THR /* Solaris threads */
 
 #include <thread.h>
@@ -147,6 +162,8 @@ typedef void *tsd_key_t[256];
 #define tsd_setspecific(key, data) (key[(unsigned)thr_self() % 256] = (data))
 #define tsd_getspecific(key, vptr) (vptr = key[(unsigned)thr_self() % 256])
 
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
 #elif USE_SPROC /* SGI sproc() threads */
 
 #include <sys/wait.h>
@@ -170,6 +187,8 @@ int tsd_key_next;
 #define tsd_setspecific(key, data) (((void **)(&PRDA->usr_prda))[key] = data)
 #define tsd_getspecific(key, vptr) (vptr = ((void **)(&PRDA->usr_prda))[key])
 
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
 #else /* no _LIBC or USE_... are defined */
 
 #define NO_THREADS
@@ -193,6 +212,8 @@ typedef void *tsd_key_t;
 #define tsd_setspecific(key, data) do {} while(0)
 #define tsd_getspecific(key, vptr) (vptr = NULL)
 
+#define thread_atfork(prepare, parent, child) do {} while(0)
+
 #endif /* defined(NO_THREADS) */
 
 #endif /* !defined(_THREAD_M_H) */