aboutsummaryrefslogtreecommitdiff
path: root/sysdeps
diff options
context:
space:
mode:
authorRoland McGrath <roland@gnu.org>1995-09-26 20:59:38 +0000
committerRoland McGrath <roland@gnu.org>1995-09-26 20:59:38 +0000
commit11c981a96d93feccba7cfb717f72db5d32a83f52 (patch)
treec9e22c5e94375dff6d4334b552dd0dbc1d169efb /sysdeps
parente11c394911f221a862cbdec8aab4a363394711c6 (diff)
downloadglibc-11c981a96d93feccba7cfb717f72db5d32a83f52.zip
glibc-11c981a96d93feccba7cfb717f72db5d32a83f52.tar.gz
glibc-11c981a96d93feccba7cfb717f72db5d32a83f52.tar.bz2
Tue Sep 26 16:50:17 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu>
* gmon: New directory of profiling code, incorporated from 4.4BSD-Lite and modified. * sysdeps/i386/machine-gmon.h: New file. * sysdeps/stub/machine-gmon.h: New file. * sysdeps/mach/hurd/profil.c: New file. * sysdeps/stub/profil.c: New file. * sysdeps/unix/bsd/profil.S: New file. * Makefile (subdirs): Add gmon. * csu/gmon-start.c: New file. * csu/Makefile (extra-objs): Add gmon-start.o, g$(start-installed-name). (install-lib, omit-deps): Add g$(start-installed-name). ($(objpfx)g$(start-installed-name)): New target.
Diffstat (limited to 'sysdeps')
-rw-r--r--sysdeps/i386/machine-gmon.h29
-rw-r--r--sysdeps/mach/hurd/profil.c164
-rw-r--r--sysdeps/stub/machine-gmon.h28
-rw-r--r--sysdeps/stub/profil.c40
-rw-r--r--sysdeps/unix/bsd/profil.S23
5 files changed, 284 insertions, 0 deletions
diff --git a/sysdeps/i386/machine-gmon.h b/sysdeps/i386/machine-gmon.h
new file mode 100644
index 0000000..4128390
--- /dev/null
+++ b/sysdeps/i386/machine-gmon.h
@@ -0,0 +1,29 @@
+/* Machine-specific calling sequence for `mcount' profiling function. i386
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#define _MCOUNT_DECL static inline void _mcount
+
+/* Call _mcount with our the return PC for our caller,
+ and the return PC our caller will return to. */
+#define MCOUNT \
+void mcount (u_long arg) \
+{ \
+ _mcount (((u_long *) (&arg)[-2])[-1], \
+ (&arg)[-1]); \
+}
diff --git a/sysdeps/mach/hurd/profil.c b/sysdeps/mach/hurd/profil.c
new file mode 100644
index 0000000..4032219
--- /dev/null
+++ b/sysdeps/mach/hurd/profil.c
@@ -0,0 +1,164 @@
+/* Low-level statistical profiling support function. Mach/Hurd version.
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <hurd.h>
+#include <mach/mach4.h>
+#include <mach/pc_sample.h>
+#include <cthreads.h>
+#include <assert.h>
+
+static thread_t profile_thread = MACH_PORT_NULL;
+static u_short *samples;
+static size_t maxsamples;
+static size_t pc_offset;
+static size_t sample_scale;
+static sampled_pc_seqno_t seqno;
+static struct mutex lock = MUTEX_INITIALIZER;
+
+/* Enable statistical profiling, writing samples of the PC into at most
+ SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
+ is enabled, the system examines the user PC and increments
+ SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
+ disable profiling. Returns zero on success, -1 on error. */
+
+static error_t
+update_waiter (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
+{
+ error_t err;
+
+ if (profile_thread == MACH_PORT_NULL)
+ {
+ /* Set up the profiling collector thread. */
+ static void profile_waiter (void);
+ err = __thread_create (__mach_task_self (), &profile_thread);
+ if (! err)
+ err = __mach_setup_thread (__mach_task_self (), profile_thread,
+ &profile_waiter, NULL, NULL);
+ }
+ else
+ err = 0;
+
+ if (! err)
+ {
+ if (sample_scale == 0)
+ err = __thread_resume (profile_thread);
+ if (! err)
+ {
+ samples = sample_buffer;
+ maxsamples = size / sizeof *sample_buffer;
+ pc_offset = offset;
+ sample_scale = scale;
+ }
+ }
+
+ return err;
+}
+
+int
+profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
+{
+ error_t err;
+
+ __mutex_lock (&lock);
+
+ if (scale == 0)
+ {
+ /* Disable profiling. */
+ int count;
+ __thread_suspend (profile_thread);
+ err = __task_disable_pc_sampling (__mach_task_self (), &count);
+ sample_scale = 0;
+ seqno = 0;
+ }
+ else
+ err = update_waiter (sample_buffer, size, offset, scale);
+
+ __mutex_unlock (&lock);
+
+ return err ? __hurd_fail (err) : 0;
+}
+
+static void
+profile_waiter (void)
+{
+ sampled_pc_t pc_samples[512];
+ mach_msg_type_number_t nsamples = 512, 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);
+
+ err = __task_get_sampled_pcs (__mach_task_self (), &seqno,
+ pc_samples, &nsamples);
+ assert_perror (err);
+
+ for (i = 0; i < nsamples; ++i)
+ {
+ size_t idx = (((pc_samples[i].pc - pc_offset) / 2) *
+ sample_scale / 65536);
+ if (idx < maxsamples)
+ ++samples[idx];
+ }
+
+ __vm_deallocate (__mach_task_self (),
+ (vm_address_t) pc_samples,
+ nsamples * sizeof *pc_samples);
+
+ __mutex_unlock (&lock);
+
+ __mach_msg (&msg, MACH_RCV_MSG|MACH_RCV_TIMEOUT, 0, sizeof msg,
+ rcv, timeout, MACH_PORT_NULL);
+ }
+}
+
+data_set_element (_hurd_fork_locks, lock);
+
+static void
+fork_profil (void)
+{
+ u_short *sb;
+ size_t n, o, ss;
+ error_t err;
+
+ if (profile_thread != MACH_PORT_NULL)
+ {
+ __mach_port_deallocate (__mach_task_self (), profile_thread);
+ profile_thread = MACH_PORT_NULL;
+ }
+
+ sb = samples;
+ samples = NULL;
+ n = maxsamples;
+ maxsamples = 0;
+ o = pc_offset;
+ pc_offset = 0;
+ ss = sample_scale;
+ sample_scale = 0;
+
+ err = update_waiter (sb, n * sizeof *sb, o, ss);
+ assert_perror (err);
+}
+text_set_element (_hurd_fork_child_hook, fork_profil);
diff --git a/sysdeps/stub/machine-gmon.h b/sysdeps/stub/machine-gmon.h
new file mode 100644
index 0000000..a6edbc0
--- /dev/null
+++ b/sysdeps/stub/machine-gmon.h
@@ -0,0 +1,28 @@
+/* Machine-specific calling sequence for `mcount' profiling function. Stub
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#define _MCOUNT_DECL static inline void _mcount
+
+/* Call _mcount with our the return PC for our caller,
+ and the return PC our caller will return to. */
+#define MCOUNT \
+void mcount (u_long arg) \
+{ \
+ _mcount (caller return PC, my return PC); \
+}
diff --git a/sysdeps/stub/profil.c b/sysdeps/stub/profil.c
new file mode 100644
index 0000000..ab8e1d4
--- /dev/null
+++ b/sysdeps/stub/profil.c
@@ -0,0 +1,40 @@
+/* Low-level statistical profiling support function. Stub version.
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+
+/* Enable statistical profiling, writing samples of the PC into at most
+ SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling
+ is enabled, the system examines the user PC and increments
+ SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero,
+ disable profiling. Returns zero on success, -1 on error. */
+
+int
+profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale)
+{
+ if (scale == 0)
+ /* Disable profiling. */
+ return 0;
+
+ errno = ENOSYS;
+ return -1;
+}
+stub_warning (profil)
diff --git a/sysdeps/unix/bsd/profil.S b/sysdeps/unix/bsd/profil.S
new file mode 100644
index 0000000..22429bd
--- /dev/null
+++ b/sysdeps/unix/bsd/profil.S
@@ -0,0 +1,23 @@
+/* Low-level statistical profiling support function. Unix syscall version.
+Copyright (C) 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <sysdep.h>
+
+SYSCALL (profil, 4)
+ ret