source/mupen64plus-core/src/debugger/debugger.c

   1 /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
   2  *   Mupen64plus - debugger.c                                              *
   3  *   Mupen64Plus homepage: http://code.google.com/p/mupen64plus/           *
   4  *   Copyright (C) 2008 DarkJeztr                                          *
   5  *   Copyright (C) 2002 davFr                                              *
   6  *                                                                         *
   7  *   This program is free software; you can redistribute it and/or modify  *
   8  *   it under the terms of the GNU General Public License as published by  *
   9  *   the Free Software Foundation; either version 2 of the License, or     *
  10  *   (at your option) any later version.                                   *
  11  *                                                                         *
  12  *   This program is distributed in the hope that it will be useful,       *
  13  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
  14  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
  15  *   GNU General Public License for more details.                          *
  16  *                                                                         *
  17  *   You should have received a copy of the GNU General Public License     *
  18  *   along with this program; if not, write to the                         *
  19  *   Free Software Foundation, Inc.,                                       *
  20  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.          *
  21  * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
  22
  23 #include <SDL.h>
  24
  25 #include "api/debugger.h"
  26
  27 #include "dbg_types.h"
  28 #include "debugger.h"
  29 #include "dbg_breakpoints.h"
  30 #include "dbg_memory.h"
  31
  32 // State of the Emulation Thread:
  33 // 0 -> pause, 2 -> run.
  34
  35 int g_DebuggerActive = 0;    // whether the debugger is enabled or not
  36 int run;
  37
  38 static SDL_cond  *debugger_done_cond;
  39 static SDL_mutex *mutex;
  40
  41 uint32 previousPC;
  42
  43 //]=-=-=-=-=-=-=-=-=-=-=[ Initialisation du Debugger ]=-=-=-=-=-=-=-=-=-=-=-=[
  44
  45 void init_debugger()
  46 {
  47     g_DebuggerActive = 1;
  48     run = 0;
  49
  50     DebuggerCallback(DEBUG_UI_INIT, 0); /* call front-end to initialize user interface */
  51
  52     init_host_disassembler();
  53
  54     mutex = SDL_CreateMutex();
  55     debugger_done_cond = SDL_CreateCond();
  56 }
  57
  58 void destroy_debugger()
  59 {
  60     SDL_DestroyMutex(mutex);
  61     mutex = NULL;
  62     SDL_DestroyCond(debugger_done_cond);
  63     debugger_done_cond = NULL;
  64     g_DebuggerActive = 0;
  65 }
  66
  67 //]=-=-=-=-=-=-=-=-=-=-=-=-=[ Mise-a-Jour Debugger ]=-=-=-=-=-=-=-=-=-=-=-=-=[
  68
  69 void update_debugger(uint32 pc)
  70 // Update debugger state and display.
  71 // Should be called after each R4300 instruction
  72 // Checks for breakpoint hits on PC
  73 {
  74     int bpt;
  75
  76     if(run!=0) {//check if we hit a breakpoint
  77         bpt = check_breakpoints(pc);
  78         if( bpt!=-1 ) {
  79             run = 0;
  80
  81             if(BPT_CHECK_FLAG(g_Breakpoints[bpt], BPT_FLAG_LOG))
  82                 log_breakpoint(pc, BPT_FLAG_EXEC, 0);
  83         }
  84     }
  85
  86     if(run!=2) {
  87         DebuggerCallback(DEBUG_UI_UPDATE, pc);  /* call front-end to notify user interface to update */
  88     }
  89     if(run==0) {
  90         // Emulation thread is blocked until a button is clicked.
  91         SDL_mutexP(mutex);
  92         SDL_CondWait(debugger_done_cond, mutex);
  93         SDL_mutexV(mutex);
  94     }
  95
  96     previousPC = pc;
  97 }
  98
  99 void debugger_step()
 100 {
 101     SDL_CondSignal(debugger_done_cond);
 102 }
 103
 104