--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libvtv/vtv_malloc.h	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,104 @@
+// Copyright (C) 2012-2017 Free Software Foundation, Inc.
+//
+// This file is part of GCC.
+//
+// GCC 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.
+
+// GCC 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.
+
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
+
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
+// <http://www.gnu.org/licenses/>.
+
+#ifndef _VTV_MALLOC_H
+#define _VTV_MALLOC_H 1
+
+#include <stdlib.h>
+
+/* Alignment mask for any object returned by the VTV memory pool */
+#ifdef __LP64__
+#define VTV_ALIGNMENT_MASK (0x7)
+#else
+#define VTV_ALIGNMENT_MASK (0x3)
+#endif
+
+/* The following function is used to instrument the compiler and find
+   out how many cycles are being spent in various vtable verification
+   runtime library functions.  */
+
+#ifdef __x86_64__
+static inline unsigned long
+rdtsc ()
+{
+  unsigned long long hi, lo;
+
+  asm volatile ("rdtsc" : "=a" (lo), "=d" (hi));
+  return hi << 32 | lo;
+}
+#elif defined (__i386__)
+static inline unsigned long long
+rdtsc ()
+{
+  unsigned long long var;
+
+  asm volatile ("rdtsc" : "=A" (var));
+
+  return var;
+}
+#else 
+static inline unsigned long long
+rdtsc ()
+{
+  /* Create an empty function for unknown architectures, so that the
+     calls to this function in vtv_malloc.cc and vtv_rts.cc do not cause
+     compilation errors.  */
+  return ((unsigned long long) 0);
+}
+#endif
+
+
+/* The following variables are used only for debugging and performance tuning
+   purposes. Therefore they do not need to be "protected".  They cannot be used
+   to attack the vtable verification system and if they become corrupted it will
+   not affect the correctness or security of any of the rest of the vtable
+   verification feature.  */
+
+extern unsigned int num_calls_to_mprotect;
+extern unsigned int num_pages_protected;
+extern unsigned int num_calls_to_regset;
+extern unsigned int num_calls_to_regpair;
+extern unsigned long long mprotect_cycles;
+extern unsigned long long regset_cycles;
+extern unsigned long long regpair_cycles;
+
+
+/* Function declarations.  */
+
+extern void __vtv_malloc_init (void);
+extern void *__vtv_malloc (size_t size) __attribute__ ((malloc));
+extern void __vtv_free (void * ptr);
+extern void __vtv_malloc_protect (void);
+extern void __vtv_malloc_unprotect (void);
+extern void __vtv_malloc_stats (void);
+extern void __vtv_malloc_dump_stats (void);
+extern int __vtv_count_mmapped_pages (void);
+
+#if defined (__CYGWIN__) || defined (__MINGW32__)
+extern "C" int mprotect (void *addr, int len, int prot);
+
+  #define PROT_READ 0x1
+  #define PROT_WRITE 0x2
+#endif
+
+#endif /* vtv_malloc.h */