1 files changed, 95 insertions, 0 deletions
diff --git a/gdbsupport/new-op.c b/gdbsupport/new-op.c
new file mode 100644
index 00000000000..cf2525c954e
--- /dev/null
+++ b/gdbsupport/new-op.c
@@ -0,0 +1,95 @@
+/* Replace operator new/new[], for GDB, the GNU debugger.
+
+   Copyright (C) 2016-2020 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+/* GCC does not understand __has_feature.  */
+#if !defined(__has_feature)
+# define __has_feature(x) 0
+#endif
+
+#if !__has_feature(address_sanitizer) && !defined(__SANITIZE_ADDRESS__)
+#include "common-defs.h"
+#include "host-defs.h"
+#include <new>
+
+/* Override operator new / operator new[], in order to internal_error
+   on allocation failure and thus query the user for abort/core
+   dump/continue, just like xmalloc does.  We don't do this from a
+   new-handler function instead (std::set_new_handler) because we want
+   to catch allocation errors from within global constructors too.
+
+   Skip overriding if building with -fsanitize=address though.
+   Address sanitizer wants to override operator new/delete too in
+   order to detect malloc+delete and new+free mismatches.  Our
+   versions would mask out ASan's, with the result of losing that
+   useful mismatch detection.
+
+   Note that C++ implementations could either have their throw
+   versions call the nothrow versions (libstdc++), or the other way
+   around (clang/libc++).  For that reason, we replace both throw and
+   nothrow variants and call malloc directly.  */
+
+void *
+operator new (std::size_t sz)
+{
+  /* malloc (0) is unpredictable; avoid it.  */
+  if (sz == 0)
+    sz = 1;
+
+  void *p = malloc (sz);	/* ARI: malloc */
+  if (p == NULL)
+    {
+      /* If the user decides to continue debugging, throw a
+	 gdb_quit_bad_alloc exception instead of a regular QUIT
+	 gdb_exception.  The former extends both std::bad_alloc and a
+	 QUIT gdb_exception.  This is necessary because operator new
+	 can only ever throw std::bad_alloc, or something that extends
+	 it.  */
+      try
+	{
+	  malloc_failure (sz);
+	}
+      catch (gdb_exception &ex)
+	{
+	  throw gdb_quit_bad_alloc (std::move (ex));
+	}
+    }
+  return p;
+}
+
+void *
+operator new (std::size_t sz, const std::nothrow_t&) noexcept
+{
+  /* malloc (0) is unpredictable; avoid it.  */
+  if (sz == 0)
+    sz = 1;
+  return malloc (sz);		/* ARI: malloc */
+}
+
+void *
+operator new[] (std::size_t sz)
+{
+   return ::operator new (sz);
+}
+
+void*
+operator new[] (std::size_t sz, const std::nothrow_t&) noexcept
+{
+  return ::operator new (sz, std::nothrow);
+}
+#endif