mirror of
https://gcc.gnu.org/git/gcc.git
synced 2024-11-24 03:14:08 +08:00
105 lines
3.1 KiB
C
105 lines
3.1 KiB
C
// Copyright (C) 2012-2020 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 */
|