gprofng: a new GNU profiler

top-level
	* Makefile.def: Add gprofng module.
	* configure.ac: Add --enable-gprofng option.
	* src-release.sh: Add gprofng.
	* Makefile.in: Regenerate.
	* configure: Regenerate.
	* gprofng: New directory.

binutils
	* MAINTAINERS: Add gprofng maintainer.
	* README-how-to-make-a-release: Add gprofng.

include.
	* collectorAPI.h: New file.
	* libcollector.h: New file.
	* libfcollector.h: New file.

1 files changed, 118 insertions, 0 deletions

diff --git a/gprofng/src/dbe_memmgr.c b/gprofng/src/dbe_memmgr.c
new file mode 100644
index 0000000..2c2e2b4
--- /dev/null
+++ b/gprofng/src/dbe_memmgr.c
@@ -0,0 +1,118 @@
+/* Copyright (C) 2021 Free Software Foundation, Inc.
+   Contributed by Oracle.
+
+   This file is part of GNU Binutils.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3, or (at your option)
+   any later version.
+
+   This program 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 General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+#include "config.h"
+#include <dlfcn.h>
+#include "util.h"
+
+#define CHECK_OUT_OF_MEM(ptr, size) if (ptr == NULL) err_out_of_memory(size)
+
+/* Report Out of Memory error and exit */
+static void
+err_out_of_memory (unsigned nbytes)
+{
+  char *nm = get_prog_name (1);
+  if (nm)
+    fprintf (stderr, GTXT ("%s: Error: Memory capacity exceeded.\n"), nm);
+  else
+    fprintf (stderr, GTXT ("Error: Memory capacity exceeded.\n"));
+  fprintf (stderr, GTXT ("  Requested %u bytes.\n"), nbytes);
+  exit (16);
+}
+
+#define CALL_REAL(x) (__real_##x)
+#define NULL_PTR(x) ( __real_##x == NULL )
+
+static void *(*__real_malloc)(size_t) = NULL;
+static void (*__real_free)(void *) = NULL;
+static void *(*__real_realloc)(void *, size_t) = NULL;
+static void *(*__real_calloc)(size_t, size_t) = NULL;
+static char *(*__real_strdup)(const char*) = NULL;
+static volatile int in_init = 0;
+
+static int
+init_heap_intf ()
+{
+  in_init = 1;
+  __real_malloc = (void*(*)(size_t))dlsym (RTLD_NEXT, "malloc");
+  __real_free = (void(*)(void *))dlsym (RTLD_NEXT, "free");
+  __real_realloc = (void*(*)(void *, size_t))dlsym (RTLD_NEXT, "realloc");
+  __real_calloc = (void*(*)(size_t, size_t))dlsym (RTLD_NEXT, "calloc");
+  __real_strdup = (char*(*)(const char*))dlsym (RTLD_NEXT, "strdup");
+  in_init = 0;
+  return 0;
+}
+
+/* --------------------------------------------------------------------------- */
+/* libc's memory management functions substitutions */
+
+/* Allocate memory and make sure we got some */
+void *
+malloc (size_t size)
+{
+  if (NULL_PTR (malloc))
+    init_heap_intf ();
+  void *ptr = CALL_REAL (malloc)(size);
+  CHECK_OUT_OF_MEM (ptr, size);
+  return ptr;
+}
+
+
+/* Implement a workaround for a libdl recursion problem */
+void *
+calloc (size_t nelem, size_t size)
+{
+  if (NULL_PTR (calloc))
+    {
+      /* If a program is linked with libpthread then the following
+       * calling sequence occurs:
+       * init_heap_intf -> dlsym -> calloc -> malloc -> init_heap_intf
+       * We break some performance improvement in libdl by returning
+       * NULL but preserve functionality.
+       */
+      if (in_init)
+	return NULL;
+      init_heap_intf ();
+    }
+  return CALL_REAL (calloc)(nelem, size);
+}
+
+/* Free the storage associated with data */
+void
+free (void *ptr)
+{
+  if (ptr == NULL)
+    return;
+  if (NULL_PTR (free))
+    init_heap_intf ();
+  CALL_REAL (free)(ptr);
+  return;
+}
+
+/* Reallocate buffer */
+void *
+realloc (void *ptr, size_t size)
+{
+  if (NULL_PTR (realloc))
+    init_heap_intf ();
+  ptr = CALL_REAL (realloc)(ptr, size);
+  CHECK_OUT_OF_MEM (ptr, size);
+  return ptr;
+}