Mon Feb 26 10:22:30 1996 Roland McGrath <roland@charlie-brown.gnu.ai.mit.edu>cvs/libc-960227

	* sysdeps/unix/dirstream.h: Rewritten.
	* sysdeps/unix/readdir.c: Rewritten.
	* sysdeps/unix/telldir.c: Rewritten.
	* sysdeps/unix/closedir.c: Use <...> instead of "..." for dirstream.h.
	Remove __ from DIR struct member names.
	* sysdeps/unix/dirfd.c: Likewise.
	* sysdeps/unix/seekdir.c: Likewise.
	* sysdeps/unix/rewinddir.c: Likewise.
	* sysdeps/unix/opendir.c: Likewise.  Don't allocate extra space after
	DIR structure.
	* sysdeps/stub/direct.h: File removed.
	* sysdeps/unix/bsd/bsd4.4/direct.h: File removed.
	* sysdeps/unix/bsd/direct.h: File removed.
	* sysdeps/unix/common/direct.h: File removed.
	* sysdeps/unix/sysv/irix4/direct.h: File removed.
	* sysdeps/unix/sysv/isc3/direct.h: File removed.
	* sysdeps/unix/sysv/sco3.2.4/direct.h: File removed.
	* sysdeps/unix/sysv/sysv4/solaris2/direct.h: File removed.
	* sysdeps/unix/common/direntry.h: New file.
	* sysdeps/unix/bsd/direntry.h: New file.
	* sysdeps/unix/bsd/bsd4.4/direntry.h: New file.
	* sysdeps/unix/sysv/direntry.h: New file.
	* sysdeps/stub/direntry.h: New file.
	* dirent/dirent.h (struct dirent): Type removed.  Include <direntry.h>
	to define it.
	(_D_EXACT_NAMLEN, _D_ALLOC_NAMLEN): New macros.
	* dirent/Makefile (headers): Add direntry.h.
	(distribute): Remove direct.h.
	* sysdeps/posix/getcwd.c: Use new macros instead of d_namlen.
	* dirent/scandir.c: Likewise.
	* io/fts.c (fts_build): Likewise.
	* io/ftw.c (ftw_dir): Likewise.
	* sysdeps/posix/ttyname.c: Likewise.

	* sysdeps/unix/sysv/sysv4/solaris2/syscalls.list: New file.

	* sysdeps/mach/hurd/profil.c (MAX_PC_SAMPLES): New macro.
	(collector_timeout): New static variable.
	(update_waiter): Actually call __task_enable_pc_sampling.
	Set collector_timeout based on the `tick' count returned.
	(profile_waiter): Use MAX_PC_SAMPLES.  Set nsamples before RPC.
	Use collector_timeout in __mach_msg call.

	* gmon/Makefile (noprof): New variable containing mcount.
	Append profil unless it is in $(unix-syscalls).
	(mcount.po): Use $(noprof) for list of targets in this rule.

	* libc-symbols.h: Define _LIBC before #include <config.h>.

Sun Feb 25 12:29:23 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* config.h.in [_LIBC] (HAVE_STRERROR): Define it.
	Protect 2nd page of #undef's for generator programs with #ifndef _LIBC.

	* time/zic.c, time/zdump.c, time/private.h: Updated from ADO's latest.

Fri Feb  9 12:40:19 1996  Brendan Kehoe  <brendan@lisa.cygnus.com>

 	* libio/cleanup.c (_IO_cleanup_registration_needed)
	[!_G_HAVE_ATEXIT]: Init to NULL.
	* libio/filedoalloc.c (_IO_cleanup_registration_needed): Remove decl.

Thu Feb  8 08:12:50 1996  Brendan Kehoe  <brendan@cygnus.com>

	* libio/filedoalloc.c (_IO_cleanup_registration_needed): Revert
	previous change, since cleanup.c only defines it if _G_HAVE_ATEXIT.

Wed Feb  7 15:10:17 1996  Brendan Kehoe  <brendan@lisa.cygnus.com>

	* libio/filedoalloc.c (_IO_cleanup_registration_needed): Declare as
	extern.

Sat Feb 24 11:34:13 1996  Roland McGrath  <roland@charlie-brown.gnu.ai.mit.edu>

	* sysdeps/i386/memcmp.S: Fix argument %esp offsets.

	* time/sys/time.h (timeradd, timersub): New macros; BSD has these.

1 files changed, 19 insertions, 6 deletions

diff --git a/sysdeps/mach/hurd/profil.c b/sysdeps/mach/hurd/profil.c
index 43456ec628..431982e498 100644
--- a/sysdeps/mach/hurd/profil.c
+++ b/sysdeps/mach/hurd/profil.c
@@ -1,5 +1,5 @@
 /* Low-level statistical profiling support function.  Mach/Hurd version.
-Copyright (C) 1995 Free Software Foundation, Inc.
+Copyright (C) 1995, 1996 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
@@ -26,6 +26,8 @@ Cambridge, MA 02139, USA.  */
 #include <cthreads.h>
 #include <assert.h>
 
+#define MAX_PC_SAMPLES	512	/* XXX ought to be exported in kernel hdr */
+
 static thread_t profile_thread = MACH_PORT_NULL;
 static u_short *samples;
 static size_t maxsamples;
@@ -33,6 +35,7 @@ static size_t pc_offset;
 static size_t sample_scale;
 static sampled_pc_seqno_t seqno;
 static struct mutex lock = MUTEX_INITIALIZER;
+static mach_msg_timeout_t collector_timeout; /* ms between collections.  */
 
 /* Enable statistical profiling, writing samples of the PC into at most
    SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
@@ -59,7 +62,12 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
 
   if (! err)
     {
-      if (sample_scale == 0)
+      int tick;			/* Microseconds per sample.  */
+      err = __task_enable_pc_sampling (__mach_task_self (), &tick,
+				       SAMPLED_PC_PERIODIC);
+      if (!err && sample_scale == 0)
+	/* Profiling was not turned on, so the collector thread was
+	   suspended.  Resume it.  */
 	err = __thread_resume (profile_thread);
       if (! err)
 	{
@@ -67,6 +75,11 @@ update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
 	  maxsamples = size / sizeof *sample_buffer;
 	  pc_offset = offset;
 	  sample_scale = scale;
+	  /* Calculate a good period for the collector thread.  From TICK
+	     and the kernel buffer size we get the length of time it takes
+	     to fill the buffer; translate that to milliseconds for
+	     mach_msg, and chop it in half for general lag factor.  */
+	  collector_timeout = MAX_PC_SAMPLES * tick / 1000 / 2;
 	}
     }
 
@@ -100,17 +113,17 @@ profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
 static void
 profile_waiter (void)
 {
-  sampled_pc_t pc_samples[512];
-  mach_msg_type_number_t nsamples = 512, i;
+  sampled_pc_t pc_samples[MAX_PC_SAMPLES];
+  mach_msg_type_number_t nsamples, i;
   mach_port_t rcv = __mach_reply_port ();
   mach_msg_header_t msg;
-  const mach_msg_timeout_t timeout = 17; /* ??? XXX */
   error_t err;
 
   while (1)
     {
       __mutex_lock (&lock);
 
+      nsamples = sizeof pc_samples / sizeof pc_samples[0];
       err = __task_get_sampled_pcs (__mach_task_self (), &seqno,
 				    pc_samples, &nsamples);
       assert_perror (err);
@@ -130,7 +143,7 @@ profile_waiter (void)
       __mutex_unlock (&lock);
 
       __mach_msg (&msg, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof msg,
-		  rcv, timeout, MACH_PORT_NULL);
+		  rcv, collector_timeout, MACH_PORT_NULL);
     }
 }