1 files changed, 120 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/posix/profil.c b/REORG.TODO/sysdeps/posix/profil.c
new file mode 100644
index 0000000000..4d3fbe0b8a
--- /dev/null
+++ b/REORG.TODO/sysdeps/posix/profil.c
@@ -0,0 +1,120 @@
+/* Low-level statistical profiling support function.  Mostly POSIX.1 version.
+   Copyright (C) 1996-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <errno.h>
+#include <signal.h>
+#include <sys/time.h>
+#include <libc-internal.h>
+#include <sigsetops.h>
+
+#ifndef SIGPROF
+
+#include <gmon/profil.c>
+
+#else
+
+static u_short *samples;
+static size_t nsamples;
+static size_t pc_offset;
+static u_int pc_scale;
+
+static inline void
+profil_count (void *pc)
+{
+  size_t i = (pc - pc_offset - (void *) 0) / 2;
+
+  if (sizeof (unsigned long long int) > sizeof (size_t))
+    i = (unsigned long long int) i * pc_scale / 65536;
+  else
+    i = i / 65536 * pc_scale + i % 65536 * pc_scale / 65536;
+
+  if (i < nsamples)
+    ++samples[i];
+}
+
+/* Get the machine-dependent definition of `__profil_counter', the signal
+   handler for SIGPROF.  It calls `profil_count' (above) with the PC of the
+   interrupted code.  */
+#include "profil-counter.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)
+{
+  struct sigaction act;
+  struct itimerval timer;
+#if !IS_IN (rtld)
+  static struct sigaction oact;
+  static struct itimerval otimer;
+# define oact_ptr &oact
+# define otimer_ptr &otimer
+
+  if (sample_buffer == NULL)
+    {
+      /* Disable profiling.  */
+      if (samples == NULL)
+	/* Wasn't turned on.  */
+	return 0;
+
+      if (__setitimer (ITIMER_PROF, &otimer, NULL) < 0)
+	return -1;
+      samples = NULL;
+      return __sigaction (SIGPROF, &oact, NULL);
+    }
+
+ if (samples)
+    {
+      /* Was already turned on.  Restore old timer and signal handler
+	 first.  */
+      if (__setitimer (ITIMER_PROF, &otimer, NULL) < 0
+	  || __sigaction (SIGPROF, &oact, NULL) < 0)
+	return -1;
+    }
+#else
+ /* In ld.so profiling should never be disabled once it runs.  */
+ //assert (sample_buffer != NULL);
+# define oact_ptr NULL
+# define otimer_ptr NULL
+#endif
+
+  samples = sample_buffer;
+  nsamples = size / sizeof *samples;
+  pc_offset = offset;
+  pc_scale = scale;
+
+  act.sa_handler = (sighandler_t) &__profil_counter;
+  act.sa_flags = SA_RESTART;
+  __sigfillset (&act.sa_mask);
+  if (__sigaction (SIGPROF, &act, oact_ptr) < 0)
+    return -1;
+
+  timer.it_value.tv_sec = 0;
+  timer.it_value.tv_usec = 1000000 / __profile_frequency ();
+  timer.it_interval = timer.it_value;
+  return __setitimer (ITIMER_PROF, &timer, otimer_ptr);
+}
+weak_alias (__profil, profil)
+
+#endif