/* -*- mode: C; c-basic-offset: 3; -*- */
/*
  This file is part of drd, a thread error detector.

  Copyright (C) 2006-2009 Bart Van Assche <bart.vanassche@gmail.com>.

  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 2 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, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  02111-1307, USA.

  The GNU General Public License is contained in the file COPYING.
*/


#include "drd_suppression.h"
#include "pub_drd_bitmap.h"
#include "pub_tool_libcassert.h"  // tl_assert()
#include "pub_tool_stacktrace.h"  // VG_(get_and_pp_StackTrace)()
#include "pub_tool_threadstate.h" // VG_(get_running_tid)()
#include "pub_tool_libcprint.h"   // Vg_DebugMsg


/* Global variables. */

Bool DRD_(g_any_address_traced) = False;


/* Local variables. */

static struct bitmap* DRD_(s_suppressed);
static Bool DRD_(s_trace_suppression);


/* Function definitions. */

void DRD_(suppression_set_trace)(const Bool trace_suppression)
{
   DRD_(s_trace_suppression) = trace_suppression;
}

void DRD_(suppression_init)(void)
{
   tl_assert(DRD_(s_suppressed) == 0);
   DRD_(s_suppressed) = DRD_(bm_new)();
   tl_assert(DRD_(s_suppressed));
}

void DRD_(start_suppression)(const Addr a1, const Addr a2,
                             const char* const reason)
{
   if (DRD_(s_trace_suppression))
   {
      VG_(message)(Vg_DebugMsg, "start suppression of 0x%lx sz %ld (%s)",
                   a1, a2 - a1, reason);
   }

   tl_assert(a1 < a2);
   // tl_assert(! drd_is_any_suppressed(a1, a2));
   DRD_(bm_access_range_store)(DRD_(s_suppressed), a1, a2);
}

void DRD_(finish_suppression)(const Addr a1, const Addr a2)
{
   if (DRD_(s_trace_suppression))
   {
      VG_(message)(Vg_DebugMsg, "finish suppression of 0x%lx sz %ld",
                   a1, a2 - a1);
      VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(), 12);   
   }

   tl_assert(a1 < a2);
   if (! DRD_(is_suppressed)(a1, a2))
   {
      VG_(message)(Vg_DebugMsg, "?? [0x%lx,0x%lx[ not suppressed ??", a1, a2);
      VG_(get_and_pp_StackTrace)(VG_(get_running_tid)(), 12);
      tl_assert(False);
   }
   DRD_(bm_clear_store)(DRD_(s_suppressed), a1, a2);
}

/**
 * Return true if data race detection suppression has been requested for all
 * bytes in the range a1 .. a2 - 1 inclusive. Return false in case the range
 * is only partially suppressed or not suppressed at all.
 */
Bool DRD_(is_suppressed)(const Addr a1, const Addr a2)
{
   return DRD_(bm_has)(DRD_(s_suppressed), a1, a2, eStore);
}

/**
 * Return true if data race detection suppression has been requested for any
 * of the bytes in the range a1 .. a2 - 1 inclusive. Return false in case none
 * of the bytes in the specified range is suppressed.
 */
Bool DRD_(is_any_suppressed)(const Addr a1, const Addr a2)
{
   return DRD_(bm_has_any_store)(DRD_(s_suppressed), a1, a2);
}

void DRD_(start_tracing_address_range)(const Addr a1, const Addr a2)
{
   tl_assert(a1 < a2);

   DRD_(bm_access_range_load)(DRD_(s_suppressed), a1, a2);
   if (! DRD_(g_any_address_traced))
   {
      DRD_(g_any_address_traced) = True;
   }
}

void DRD_(stop_tracing_address_range)(const Addr a1, const Addr a2)
{
   tl_assert(a1 < a2);

   DRD_(bm_clear_load)(DRD_(s_suppressed), a1, a2);
   if (DRD_(g_any_address_traced))
   {
      DRD_(g_any_address_traced)
         = DRD_(bm_has_any_load)(DRD_(s_suppressed), 0, ~(Addr)0);
   }
}

Bool DRD_(is_any_traced)(const Addr a1, const Addr a2)
{
   return DRD_(bm_has_any_load)(DRD_(s_suppressed), a1, a2);
}

void DRD_(suppression_stop_using_mem)(const Addr a1, const Addr a2)
{
   if (DRD_(s_trace_suppression))
   {
      Addr b;
      for (b = a1; b < a2; b++)
      {
         if (DRD_(bm_has_1)(DRD_(s_suppressed), b, eStore))
         {
            VG_(message)(Vg_DebugMsg,
                         "stop_using_mem(0x%lx, %ld) finish suppression of"
                         " 0x%lx", a1, a2 - a1, b);
         }
      }
   }
   tl_assert(a1);
   tl_assert(a1 < a2);
   DRD_(bm_clear)(DRD_(s_suppressed), a1, a2);
}