debugger/winedbg.c - wine - Git at Google

 /* -*- tab-width: 8; c-basic-offset: 4 -*- */

 /* Wine internal debugger
  * Interface to Windows debugger API
  * Eric Pouech (c) 2000
  */

 #include <stdlib.h>
 #include <stdio.h>
 #include <sys/stat.h>
 #include "debugger.h"

 #include "thread.h"
 #include "process.h"
 #include "wingdi.h"
 #include "winuser.h"

 #include "winreg.h"
 #include "debugtools.h"
 #include "options.h"

 #ifdef DBG_need_heap
 HANDLE dbg_heap = 0;
 #endif

 DEFAULT_DEBUG_CHANNEL(winedbg);

 DBG_PROCESS*	DEBUG_CurrProcess = NULL;
 DBG_THREAD*	DEBUG_CurrThread = NULL;
 CONTEXT		DEBUG_context;

 static DBG_PROCESS* proc = NULL;
 static BOOL bBreakAllThreads = FALSE;

 static	BOOL DEBUG_Init(void)
 {
     HKEY	hkey;
     DWORD 	type;
     DWORD	val;
     DWORD 	count = sizeof(val);

     if (!RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) {
 	if (!RegQueryValueExA(hkey, "BreakAllThreadsStartup", 0, &type, (LPSTR)&val, &count)) {
 	    bBreakAllThreads = val;
 	}
 	RegCloseKey(hkey);
     }
     return TRUE;
 }

 static WINE_EXCEPTION_FILTER(wine_dbg)
 {
     DEBUG_ExternalDebugger();
     fprintf(stderr, "\nwine_dbg: Exception %lx\n", GetExceptionCode());
     return EXCEPTION_EXECUTE_HANDLER;
 }

 static	DBG_PROCESS*	DEBUG_GetProcess(DWORD pid)
 {
     DBG_PROCESS*	p;

     for (p = proc; p; p = p->next)
 	if (p->pid == pid) break;
     return p;
 }

 static	DBG_PROCESS*	DEBUG_AddProcess(DWORD pid, HANDLE h)
 {
     DBG_PROCESS*	p = DBG_alloc(sizeof(DBG_PROCESS));
     if (!p)
 	return NULL;
     p->handle = h;
     p->pid = pid;
     p->threads = NULL;
     p->num_threads = 0;
     p->modules = NULL;
     p->next_index = 0;

     p->next = proc;
     p->prev = NULL;
     if (proc) proc->prev = p;
     proc = p;
     return p;
 }

 static	void			DEBUG_DelThread(DBG_THREAD* p);

 static	void			DEBUG_DelProcess(DBG_PROCESS* p)
 {
     if (p->threads != NULL) {
 	ERR("Shouldn't happen\n");
 	while (p->threads) DEBUG_DelThread(p->threads);
     }
     if (p->prev) p->prev->next = p->next;
     if (p->next) p->next->prev = p->prev;
     if (p == proc) proc = p->next;
     DBG_free(p);
 }

 static	void			DEBUG_InitCurrProcess(void)
 {
 #ifdef DBG_need_heap
     /*
      * Initialize the debugger heap.
      */
     dbg_heap = HeapCreate(HEAP_NO_SERIALIZE, 0x1000, 0x8000000); /* 128MB */
 #endif

     /*
      * Initialize the type handling stuff.
      */
     DEBUG_InitTypes();
     DEBUG_InitCVDataTypes();

     /*
      * In some cases we can read the stabs information directly
      * from the executable.  If this is the case, we don't need
      * to bother with trying to read a symbol file, as the stabs
      * also have line number and local variable information.
      * As long as gcc is used for the compiler, stabs will
      * be the default.  On SVr4, DWARF could be used, but we
      * don't grok that yet, and in this case we fall back to using
      * the wine.sym file.
      */
     if( DEBUG_ReadExecutableDbgInfo() == FALSE )
     {
 	char*		symfilename = "wine.sym";
 	struct stat	statbuf;
 	HKEY 		hWineConf, hkey;
 	DWORD 		count;
 	char 		symbolTableFile[256];

 	if (-1 == stat(symfilename, &statbuf) )
 	    symfilename = LIBDIR "wine.sym";

 	strcpy(symbolTableFile, symfilename);
 	if (!RegOpenKeyA(HKEY_LOCAL_MACHINE, "Software\\Wine\\Wine\\Config", &hWineConf)) {
 	    if (!RegOpenKeyA(hWineConf, "wine", &hkey)) {
 		count = sizeof(symbolTableFile);
 		RegQueryValueA(hkey, "SymbolTableFile", symbolTableFile, &count);
 		RegCloseKey(hkey);
 	    }
 	    RegCloseKey(hWineConf);
 	}
 	DEBUG_ReadSymbolTable(symbolTableFile);
     }
     DEBUG_LoadEntryPoints(NULL);
     DEBUG_ProcessDeferredDebug();
 }

 static BOOL DEBUG_ProcessGetString(char* buffer, int size, HANDLE hp, LPSTR addr)
 {
     DWORD sz;
     *(WCHAR*)buffer = 0;
     return (addr && ReadProcessMemory(hp, addr, buffer, size, &sz));
 }

 static BOOL DEBUG_ProcessGetStringIndirect(char* buffer, int size, HANDLE hp, LPVOID addr)
 {
     LPVOID	ad;
     DWORD	sz;

     if (   addr
 	&& ReadProcessMemory(hp, addr, &ad, sizeof(ad), &sz)
 	&& sz == sizeof(ad)
         && ad
         && ReadProcessMemory(hp, ad, buffer, size, &sz))
 	return TRUE;
     *(WCHAR*)buffer = 0;
     return FALSE;
 }

 static	DBG_THREAD*	DEBUG_GetThread(DBG_PROCESS* p, DWORD tid)
 {
     DBG_THREAD*	t;

     for (t = p->threads; t; t = t->next)
 	if (t->tid == tid) break;
     return t;
 }

 static	DBG_THREAD*	DEBUG_AddThread(DBG_PROCESS* p, DWORD tid,
 					HANDLE h, LPVOID start, LPVOID teb)
 {
     DBG_THREAD*	t = DBG_alloc(sizeof(DBG_THREAD));
     if (!t)
 	return NULL;

     t->handle = h;
     t->tid = tid;
     t->start = start;
     t->teb = teb;
     t->process = p;
     t->wait_for_first_exception = 0;
     t->dbg_exec_mode = EXEC_CONT;
     t->dbg_exec_count = 0;

     p->num_threads++;
     t->next = p->threads;
     t->prev = NULL;
     if (p->threads) p->threads->prev = t;
     p->threads = t;

     return t;
 }

 static	void			DEBUG_InitCurrThread(void)
 {
     if (!Options.debug) return;

     if (DEBUG_CurrThread->start) {
 	if (DEBUG_CurrThread->process->num_threads == 1 || bBreakAllThreads) {
 	    DBG_VALUE	value;

 	    DEBUG_SetBreakpoints(FALSE);
 	    value.type = NULL;
 	    value.cookie = DV_TARGET;
 	    value.addr.seg = 0;
 	    value.addr.off = (DWORD)DEBUG_CurrThread->start;
 	    DEBUG_AddBreakpoint(&value);
 	    DEBUG_SetBreakpoints(TRUE);
 	}
     } else {
 	DEBUG_CurrThread->wait_for_first_exception = 1;
     }
 }

 static	void			DEBUG_DelThread(DBG_THREAD* t)
 {
     if (t->prev) t->prev->next = t->next;
     if (t->next) t->next->prev = t->prev;
     if (t == t->process->threads) t->process->threads = t->next;
     t->process->num_threads--;
     DBG_free(t);
 }

 static	BOOL	DEBUG_HandleException( EXCEPTION_RECORD *rec, BOOL first_chance, BOOL force )
 {
     BOOL	is_debug = FALSE;
     BOOL	ret;

     if (first_chance && !Options.debug && !force ) return 0;  /* pass to app first */

     switch (rec->ExceptionCode)
     {
     case EXCEPTION_BREAKPOINT:
     case EXCEPTION_SINGLE_STEP:
         is_debug = TRUE;
         break;
     case CONTROL_C_EXIT:
         if (!Options.debug) DEBUG_Exit(0);
         break;
     }

     if (!is_debug)
     {
         /* print some infos */
         fprintf( stderr, "%s: ",
                  first_chance ? "First chance exception" : "Unhandled exception" );
         switch(rec->ExceptionCode)
         {
         case EXCEPTION_INT_DIVIDE_BY_ZERO:
             fprintf( stderr, "divide by zero" );
             break;
         case EXCEPTION_INT_OVERFLOW:
             fprintf( stderr, "overflow" );
             break;
         case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
             fprintf( stderr, "array bounds " );
             break;
         case EXCEPTION_ILLEGAL_INSTRUCTION:
             fprintf( stderr, "illegal instruction" );
             break;
         case EXCEPTION_STACK_OVERFLOW:
             fprintf( stderr, "stack overflow" );
             break;
         case EXCEPTION_PRIV_INSTRUCTION:
             fprintf( stderr, "priviledged instruction" );
             break;
         case EXCEPTION_ACCESS_VIOLATION:
             if (rec->NumberParameters == 2)
                 fprintf( stderr, "page fault on %s access to 0x%08lx",
                          rec->ExceptionInformation[0] ? "write" : "read",
                          rec->ExceptionInformation[1] );
             else
                 fprintf( stderr, "page fault" );
             break;
         case EXCEPTION_DATATYPE_MISALIGNMENT:
             fprintf( stderr, "Alignment" );
             break;
         case CONTROL_C_EXIT:
             fprintf( stderr, "^C" );
             break;
         case EXCEPTION_CRITICAL_SECTION_WAIT:
             fprintf( stderr, "critical section %08lx wait failed",
 		     rec->ExceptionInformation[0] );
             break;
         default:
             fprintf( stderr, "%08lx", rec->ExceptionCode );
             break;
         }
     }

 #if 1
     fprintf(stderr, "Entering debugger 	PC=%lx EFL=%08lx mode=%d count=%d\n",
 	    DEBUG_context.Eip, DEBUG_context.EFlags,
 	    DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
 #endif

     ret = DEBUG_Main( is_debug, force, rec->ExceptionCode );
 #if 1
     fprintf(stderr, "Exiting debugger 	PC=%lx EFL=%08lx mode=%d count=%d\n",
 	    DEBUG_context.Eip, DEBUG_context.EFlags,
 	    DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
 #endif

     return ret;
 }

 static	DWORD	DEBUG_HandleDebugEvent(DEBUG_EVENT* de)
 {
     char		buffer[256];
     DWORD		cont;

     __TRY {
 	cont = 0L;

 	if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL)
 	    DEBUG_CurrThread = DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId);
 	else
 	    DEBUG_CurrThread = NULL;

 	switch (de->dwDebugEventCode) {
 	case EXCEPTION_DEBUG_EVENT:
 	    if (!DEBUG_CurrThread) break;

 	    TRACE("%08lx:%08lx: exception code=%08lx %d\n",
 		  de->dwProcessId, de->dwThreadId,
 		  de->u.Exception.ExceptionRecord.ExceptionCode,
 		  DEBUG_CurrThread->wait_for_first_exception);

 	    DEBUG_context.ContextFlags = CONTEXT_CONTROL|CONTEXT_INTEGER|CONTEXT_SEGMENTS|CONTEXT_DEBUG_REGISTERS;
 	    if (!GetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context)) {
 		WARN("Can't get thread's context\n");
 		break;
 	    }

 	    TRACE("%p:%p\n", de->u.Exception.ExceptionRecord.ExceptionAddress,
 		  (void*)DEBUG_context.Eip);

 	    cont = DEBUG_HandleException(&de->u.Exception.ExceptionRecord,
 					 de->u.Exception.dwFirstChance,
 					 DEBUG_CurrThread->wait_for_first_exception);

 	    if (DEBUG_CurrThread->wait_for_first_exception) {
 		DEBUG_CurrThread->wait_for_first_exception = 0;
 #ifdef __i386__
 		DEBUG_context.Eip--;
 #endif
 	    }
 	    SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
 	    break;

 	case CREATE_THREAD_DEBUG_EVENT:
 	    TRACE("%08lx:%08lx: create thread D @%p\n", de->dwProcessId, de->dwThreadId,
 		  de->u.CreateThread.lpStartAddress);

 	    if (DEBUG_CurrProcess == NULL) {
 		ERR("Unknown process\n");
 		break;
 	    }
 	    if (DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId) != NULL) {
 		TRACE("Thread already listed, skipping\n");
 		break;
 	    }

 	    DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
 					       de->dwThreadId,
 					       de->u.CreateThread.hThread,
 					       de->u.CreateThread.lpStartAddress,
 					       de->u.CreateThread.lpThreadLocalBase);
 	    if (!DEBUG_CurrThread) {
 		ERR("Couldn't create thread\n");
 		break;
 	    }
 	    DEBUG_InitCurrThread();
 	    break;

 	case CREATE_PROCESS_DEBUG_EVENT:
 	    DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
                                            de->u.CreateProcessInfo.hProcess,
                                            de->u.LoadDll.lpImageName);

 	    /* FIXME unicode ? de->u.CreateProcessInfo.fUnicode */
 	    TRACE("%08lx:%08lx: create process %s @%p\n",
 		  de->dwProcessId, de->dwThreadId,
 		  buffer,
 		  de->u.CreateProcessInfo.lpStartAddress);

 	    if (DEBUG_GetProcess(de->dwProcessId) != NULL) {
 		TRACE("Skipping already defined process\n");
 		break;
 	    }
 	    DEBUG_CurrProcess = DEBUG_AddProcess(de->dwProcessId,
 						 de->u.CreateProcessInfo.hProcess);
 	    if (DEBUG_CurrProcess == NULL) {
 		ERR("Unknown process\n");
 		break;
 	    }

 	    TRACE("%08lx:%08lx: create thread I @%p\n", de->dwProcessId, de->dwThreadId,
 		  de->u.CreateProcessInfo.lpStartAddress);

 	    DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
 					       de->dwThreadId,
 					       de->u.CreateProcessInfo.hThread,
 					       de->u.CreateProcessInfo.lpStartAddress,
 					       de->u.CreateProcessInfo.lpThreadLocalBase);
 	    if (!DEBUG_CurrThread) {
 		ERR("Couldn't create thread\n");
 		break;
 	    }

 	    DEBUG_InitCurrProcess();
 	    DEBUG_InitCurrThread();
 #ifdef _WE_SUPPORT_THE_STAB_TYPES_USED_BY_MINGW_TOO
 	    /* so far, process name is not set */
 	    DEBUG_RegisterDebugInfo((DWORD)de->u.CreateProcessInfo.lpBaseOfImage,
 				    "wine-exec");
 #endif
 	    break;

 	case EXIT_THREAD_DEBUG_EVENT:
 	    TRACE("%08lx:%08lx: exit thread (%ld)\n",
 		  de->dwProcessId, de->dwThreadId, de->u.ExitThread.dwExitCode);

 	    if (DEBUG_CurrThread == NULL) {
 		ERR("Unknown thread\n");
 		break;
 	    }
 	    /* FIXME: remove break point set on thread startup */
 	    DEBUG_DelThread(DEBUG_CurrThread);
 	    break;

 	case EXIT_PROCESS_DEBUG_EVENT:
 	    TRACE("%08lx:%08lx: exit process (%ld)\n",
 		  de->dwProcessId, de->dwThreadId, de->u.ExitProcess.dwExitCode);

 	    if (DEBUG_CurrProcess == NULL) {
 		ERR("Unknown process\n");
 		break;
 	    }
 	    /* kill last thread */
 	    DEBUG_DelThread(DEBUG_CurrProcess->threads);
 	    /* FIXME: remove break point set on thread startup */
 	    DEBUG_DelProcess(DEBUG_CurrProcess);
 	    break;

 	case LOAD_DLL_DEBUG_EVENT:
 	    if (DEBUG_CurrThread == NULL) {
 		ERR("Unknown thread\n");
 		break;
 	    }
 	    DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
                                            DEBUG_CurrThread->process->handle,
                                            de->u.LoadDll.lpImageName);

 	    /* FIXME unicode: de->u.LoadDll.fUnicode */
 	    TRACE("%08lx:%08lx: loads DLL %s @%p\n", de->dwProcessId, de->dwThreadId,
 		  buffer, de->u.LoadDll.lpBaseOfDll);
 	    CharUpperA(buffer);
 	    DEBUG_LoadModule32( buffer, (DWORD)de->u.LoadDll.lpBaseOfDll);
 	    break;

 	case UNLOAD_DLL_DEBUG_EVENT:
 	    TRACE("%08lx:%08lx: unload DLL @%p\n", de->dwProcessId, de->dwThreadId,
 		  de->u.UnloadDll.lpBaseOfDll);
 	    break;

 	case OUTPUT_DEBUG_STRING_EVENT:
 	    if (DEBUG_CurrThread == NULL) {
 		ERR("Unknown thread\n");
 		break;
 	    }

 	    DEBUG_ProcessGetString(buffer, sizeof(buffer),
 				   DEBUG_CurrThread->process->handle,
 				   de->u.DebugString.lpDebugStringData);

 	    /* fixme unicode de->u.DebugString.fUnicode ? */
 	    TRACE("%08lx:%08lx: output debug string (%s)\n",
 		  de->dwProcessId, de->dwThreadId,
 		  buffer);
 	    break;

 	case RIP_EVENT:
 	    TRACE("%08lx:%08lx: rip error=%ld type=%ld\n",
 		  de->dwProcessId, de->dwThreadId, de->u.RipInfo.dwError,
 		  de->u.RipInfo.dwType);
 	    break;

 	default:
 	    TRACE("%08lx:%08lx: unknown event (%ld)\n",
 		  de->dwProcessId, de->dwThreadId, de->dwDebugEventCode);
 	}

     } __EXCEPT(wine_dbg) {
 	cont = 0;
     }
     __ENDTRY;

     return cont;
 }

 static	DWORD	CALLBACK	DEBUG_MainLoop(DWORD pid)
 {
     DEBUG_EVENT		de;
     DWORD		cont;

     DEBUG_Init();

     while (WaitForDebugEvent(&de, INFINITE)) {
 	cont = DEBUG_HandleDebugEvent(&de);
 	ContinueDebugEvent(de.dwProcessId, de.dwThreadId, cont);
     }

     TRACE("WineDbg terminated on pid %ld\n", pid);

     return 0L;
 }

 static	DWORD	CALLBACK	DEBUG_StarterFromPID(LPVOID pid)
 {
     TRACE("WineDbg started on pid %ld\n", (DWORD)pid);

     if (!DebugActiveProcess((DWORD)pid)) {
 	TRACE("Can't debug process %ld: %ld\n", (DWORD)pid, GetLastError());
 	return 0;
     }
     return DEBUG_MainLoop((DWORD)pid);
 }

 void	DEBUG_Attach(DWORD pid)
 {
     CreateThread(NULL, 0, DEBUG_StarterFromPID, (LPVOID)pid, 0, NULL);
 }

 struct dsfcl {
     HANDLE	hEvent;
     LPSTR	lpCmdLine;
     int		showWindow;
     DWORD	error;
 };

 static	DWORD	CALLBACK	DEBUG_StarterFromCmdLine(LPVOID p)
 {
     PROCESS_INFORMATION	info;
     STARTUPINFOA	startup;
     BOOL		ok = TRUE;

     memset(&startup, 0, sizeof(startup));
     startup.cb = sizeof(startup);
     startup.dwFlags = STARTF_USESHOWWINDOW;
     startup.wShowWindow = ((struct dsfcl*)p)->showWindow;

     /* any value >= 32 will do, simulate a correct handle value */
     ((struct dsfcl*)p)->error = 0xFFFFFFFF;
     if (!CreateProcessA(NULL, ((struct dsfcl*)p)->lpCmdLine, NULL, NULL,
 			FALSE, DEBUG_PROCESS, NULL, NULL, &startup, &info)) {
 	((struct dsfcl*)p)->error = GetLastError();
 	ok = FALSE;
     }
     SetEvent(((struct dsfcl*)p)->hEvent);
     if (ok) DEBUG_MainLoop(info.dwProcessId);

     return 0;
 }

 DWORD	DEBUG_WinExec(LPSTR lpCmdLine, int sw)
 {
     struct dsfcl 	s;
     BOOL		ret;

     if ((s.hEvent = CreateEventA(NULL, FALSE, FALSE, NULL))) {
 	s.lpCmdLine = lpCmdLine;
 	s.showWindow = sw;
 	if (CreateThread(NULL, 0, DEBUG_StarterFromCmdLine, (LPVOID)&s, 0, NULL)) {
 	    WaitForSingleObject(s.hEvent, INFINITE);
 	    ret = s.error;
 	} else {
 	    ret = 3; /* (dummy) error value for non created thread */
 	}
 	CloseHandle(s.hEvent);
     } else {
 	ret = 1; /* (dummy) error value for non created event */
     }
     return ret;
 }
	/* -- tab-width: 8; c-basic-offset: 4 -- */

	/* Wine internal debugger
	* Interface to Windows debugger API
	* Eric Pouech (c) 2000
	*/

	#include <stdlib.h>
	#include <stdio.h>
	#include <sys/stat.h>
	#include "debugger.h"

	#include "thread.h"
	#include "process.h"
	#include "wingdi.h"
	#include "winuser.h"

	#include "winreg.h"
	#include "debugtools.h"
	#include "options.h"

	#ifdef DBG_need_heap
	HANDLE dbg_heap = 0;
	#endif

	DEFAULT_DEBUG_CHANNEL(winedbg);

	DBG_PROCESS* DEBUG_CurrProcess = NULL;
	DBG_THREAD* DEBUG_CurrThread = NULL;
	CONTEXT DEBUG_context;

	static DBG_PROCESS* proc = NULL;
	static BOOL bBreakAllThreads = FALSE;

	static BOOL DEBUG_Init(void)
	{
	HKEY hkey;
	DWORD type;
	DWORD val;
	DWORD count = sizeof(val);

	if (!RegOpenKeyA(HKEY_CURRENT_USER, "Software\\Wine\\WineDbg", &hkey)) {
	if (!RegQueryValueExA(hkey, "BreakAllThreadsStartup", 0, &type, (LPSTR)&val, &count)) {
	bBreakAllThreads = val;
	}
	RegCloseKey(hkey);
	}
	return TRUE;
	}

	static WINE_EXCEPTION_FILTER(wine_dbg)
	{
	DEBUG_ExternalDebugger();
	fprintf(stderr, "\nwine_dbg: Exception %lx\n", GetExceptionCode());
	return EXCEPTION_EXECUTE_HANDLER;
	}

	static DBG_PROCESS* DEBUG_GetProcess(DWORD pid)
	{
	DBG_PROCESS* p;

	for (p = proc; p; p = p->next)
	if (p->pid == pid) break;
	return p;
	}

	static DBG_PROCESS* DEBUG_AddProcess(DWORD pid, HANDLE h)
	{
	DBG_PROCESS* p = DBG_alloc(sizeof(DBG_PROCESS));
	if (!p)
	return NULL;
	p->handle = h;
	p->pid = pid;
	p->threads = NULL;
	p->num_threads = 0;
	p->modules = NULL;
	p->next_index = 0;

	p->next = proc;
	p->prev = NULL;
	if (proc) proc->prev = p;
	proc = p;
	return p;
	}

	static void DEBUG_DelThread(DBG_THREAD* p);

	static void DEBUG_DelProcess(DBG_PROCESS* p)
	{
	if (p->threads != NULL) {
	ERR("Shouldn't happen\n");
	while (p->threads) DEBUG_DelThread(p->threads);
	}
	if (p->prev) p->prev->next = p->next;
	if (p->next) p->next->prev = p->prev;
	if (p == proc) proc = p->next;
	DBG_free(p);
	}

	static void DEBUG_InitCurrProcess(void)
	{
	#ifdef DBG_need_heap
	/*
	* Initialize the debugger heap.
	*/
	dbg_heap = HeapCreate(HEAP_NO_SERIALIZE, 0x1000, 0x8000000); /* 128MB */
	#endif

	/*
	* Initialize the type handling stuff.
	*/
	DEBUG_InitTypes();
	DEBUG_InitCVDataTypes();

	/*
	* In some cases we can read the stabs information directly
	* from the executable. If this is the case, we don't need
	* to bother with trying to read a symbol file, as the stabs
	* also have line number and local variable information.
	* As long as gcc is used for the compiler, stabs will
	* be the default. On SVr4, DWARF could be used, but we
	* don't grok that yet, and in this case we fall back to using
	* the wine.sym file.
	*/
	if( DEBUG_ReadExecutableDbgInfo() == FALSE )
	{
	char* symfilename = "wine.sym";
	struct stat statbuf;
	HKEY hWineConf, hkey;
	DWORD count;
	char symbolTableFile[256];

	if (-1 == stat(symfilename, &statbuf) )
	symfilename = LIBDIR "wine.sym";

	strcpy(symbolTableFile, symfilename);
	if (!RegOpenKeyA(HKEY_LOCAL_MACHINE, "Software\\Wine\\Wine\\Config", &hWineConf)) {
	if (!RegOpenKeyA(hWineConf, "wine", &hkey)) {
	count = sizeof(symbolTableFile);
	RegQueryValueA(hkey, "SymbolTableFile", symbolTableFile, &count);
	RegCloseKey(hkey);
	}
	RegCloseKey(hWineConf);
	}
	DEBUG_ReadSymbolTable(symbolTableFile);
	}
	DEBUG_LoadEntryPoints(NULL);
	DEBUG_ProcessDeferredDebug();
	}

	static BOOL DEBUG_ProcessGetString(char* buffer, int size, HANDLE hp, LPSTR addr)
	{
	DWORD sz;
	(WCHAR)buffer = 0;
	return (addr && ReadProcessMemory(hp, addr, buffer, size, &sz));
	}

	static BOOL DEBUG_ProcessGetStringIndirect(char* buffer, int size, HANDLE hp, LPVOID addr)
	{
	LPVOID ad;
	DWORD sz;

	if ( addr
	&& ReadProcessMemory(hp, addr, &ad, sizeof(ad), &sz)
	&& sz == sizeof(ad)
	&& ad
	&& ReadProcessMemory(hp, ad, buffer, size, &sz))
	return TRUE;
	(WCHAR)buffer = 0;
	return FALSE;
	}

	static DBG_THREAD* DEBUG_GetThread(DBG_PROCESS* p, DWORD tid)
	{
	DBG_THREAD* t;

	for (t = p->threads; t; t = t->next)
	if (t->tid == tid) break;
	return t;
	}

	static DBG_THREAD* DEBUG_AddThread(DBG_PROCESS* p, DWORD tid,
	HANDLE h, LPVOID start, LPVOID teb)
	{
	DBG_THREAD* t = DBG_alloc(sizeof(DBG_THREAD));
	if (!t)
	return NULL;

	t->handle = h;
	t->tid = tid;
	t->start = start;
	t->teb = teb;
	t->process = p;
	t->wait_for_first_exception = 0;
	t->dbg_exec_mode = EXEC_CONT;
	t->dbg_exec_count = 0;

	p->num_threads++;
	t->next = p->threads;
	t->prev = NULL;
	if (p->threads) p->threads->prev = t;
	p->threads = t;

	return t;
	}

	static void DEBUG_InitCurrThread(void)
	{
	if (!Options.debug) return;

	if (DEBUG_CurrThread->start) {
	if (DEBUG_CurrThread->process->num_threads == 1 \|\| bBreakAllThreads) {
	DBG_VALUE value;

	DEBUG_SetBreakpoints(FALSE);
	value.type = NULL;
	value.cookie = DV_TARGET;
	value.addr.seg = 0;
	value.addr.off = (DWORD)DEBUG_CurrThread->start;
	DEBUG_AddBreakpoint(&value);
	DEBUG_SetBreakpoints(TRUE);
	}
	} else {
	DEBUG_CurrThread->wait_for_first_exception = 1;
	}
	}

	static void DEBUG_DelThread(DBG_THREAD* t)
	{
	if (t->prev) t->prev->next = t->next;
	if (t->next) t->next->prev = t->prev;
	if (t == t->process->threads) t->process->threads = t->next;
	t->process->num_threads--;
	DBG_free(t);
	}

	static BOOL DEBUG_HandleException( EXCEPTION_RECORD *rec, BOOL first_chance, BOOL force )
	{
	BOOL is_debug = FALSE;
	BOOL ret;

	if (first_chance && !Options.debug && !force ) return 0; /* pass to app first */

	switch (rec->ExceptionCode)
	{
	case EXCEPTION_BREAKPOINT:
	case EXCEPTION_SINGLE_STEP:
	is_debug = TRUE;
	break;
	case CONTROL_C_EXIT:
	if (!Options.debug) DEBUG_Exit(0);
	break;
	}

	if (!is_debug)
	{
	/* print some infos */
	fprintf( stderr, "%s: ",
	first_chance ? "First chance exception" : "Unhandled exception" );
	switch(rec->ExceptionCode)
	{
	case EXCEPTION_INT_DIVIDE_BY_ZERO:
	fprintf( stderr, "divide by zero" );
	break;
	case EXCEPTION_INT_OVERFLOW:
	fprintf( stderr, "overflow" );
	break;
	case EXCEPTION_ARRAY_BOUNDS_EXCEEDED:
	fprintf( stderr, "array bounds " );
	break;
	case EXCEPTION_ILLEGAL_INSTRUCTION:
	fprintf( stderr, "illegal instruction" );
	break;
	case EXCEPTION_STACK_OVERFLOW:
	fprintf( stderr, "stack overflow" );
	break;
	case EXCEPTION_PRIV_INSTRUCTION:
	fprintf( stderr, "priviledged instruction" );
	break;
	case EXCEPTION_ACCESS_VIOLATION:
	if (rec->NumberParameters == 2)
	fprintf( stderr, "page fault on %s access to 0x%08lx",
	rec->ExceptionInformation[0] ? "write" : "read",
	rec->ExceptionInformation[1] );
	else
	fprintf( stderr, "page fault" );
	break;
	case EXCEPTION_DATATYPE_MISALIGNMENT:
	fprintf( stderr, "Alignment" );
	break;
	case CONTROL_C_EXIT:
	fprintf( stderr, "^C" );
	break;
	case EXCEPTION_CRITICAL_SECTION_WAIT:
	fprintf( stderr, "critical section %08lx wait failed",
	rec->ExceptionInformation[0] );
	break;
	default:
	fprintf( stderr, "%08lx", rec->ExceptionCode );
	break;
	}
	}

	#if 1
	fprintf(stderr, "Entering debugger PC=%lx EFL=%08lx mode=%d count=%d\n",
	DEBUG_context.Eip, DEBUG_context.EFlags,
	DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
	#endif

	ret = DEBUG_Main( is_debug, force, rec->ExceptionCode );
	#if 1
	fprintf(stderr, "Exiting debugger PC=%lx EFL=%08lx mode=%d count=%d\n",
	DEBUG_context.Eip, DEBUG_context.EFlags,
	DEBUG_CurrThread->dbg_exec_mode, DEBUG_CurrThread->dbg_exec_count);
	#endif

	return ret;
	}

	static DWORD DEBUG_HandleDebugEvent(DEBUG_EVENT* de)
	{
	char buffer[256];
	DWORD cont;

	__TRY {
	cont = 0L;

	if ((DEBUG_CurrProcess = DEBUG_GetProcess(de->dwProcessId)) != NULL)
	DEBUG_CurrThread = DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId);
	else
	DEBUG_CurrThread = NULL;

	switch (de->dwDebugEventCode) {
	case EXCEPTION_DEBUG_EVENT:
	if (!DEBUG_CurrThread) break;

	TRACE("%08lx:%08lx: exception code=%08lx %d\n",
	de->dwProcessId, de->dwThreadId,
	de->u.Exception.ExceptionRecord.ExceptionCode,
	DEBUG_CurrThread->wait_for_first_exception);

	DEBUG_context.ContextFlags = CONTEXT_CONTROL\|CONTEXT_INTEGER\|CONTEXT_SEGMENTS\|CONTEXT_DEBUG_REGISTERS;
	if (!GetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context)) {
	WARN("Can't get thread's context\n");
	break;
	}

	TRACE("%p:%p\n", de->u.Exception.ExceptionRecord.ExceptionAddress,
	(void*)DEBUG_context.Eip);

	cont = DEBUG_HandleException(&de->u.Exception.ExceptionRecord,
	de->u.Exception.dwFirstChance,
	DEBUG_CurrThread->wait_for_first_exception);

	if (DEBUG_CurrThread->wait_for_first_exception) {
	DEBUG_CurrThread->wait_for_first_exception = 0;
	#ifdef __i386__
	DEBUG_context.Eip--;
	#endif
	}
	SetThreadContext(DEBUG_CurrThread->handle, &DEBUG_context);
	break;

	case CREATE_THREAD_DEBUG_EVENT:
	TRACE("%08lx:%08lx: create thread D @%p\n", de->dwProcessId, de->dwThreadId,
	de->u.CreateThread.lpStartAddress);

	if (DEBUG_CurrProcess == NULL) {
	ERR("Unknown process\n");
	break;
	}
	if (DEBUG_GetThread(DEBUG_CurrProcess, de->dwThreadId) != NULL) {
	TRACE("Thread already listed, skipping\n");
	break;
	}

	DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
	de->dwThreadId,
	de->u.CreateThread.hThread,
	de->u.CreateThread.lpStartAddress,
	de->u.CreateThread.lpThreadLocalBase);
	if (!DEBUG_CurrThread) {
	ERR("Couldn't create thread\n");
	break;
	}
	DEBUG_InitCurrThread();
	break;

	case CREATE_PROCESS_DEBUG_EVENT:
	DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
	de->u.CreateProcessInfo.hProcess,
	de->u.LoadDll.lpImageName);

	/* FIXME unicode ? de->u.CreateProcessInfo.fUnicode */
	TRACE("%08lx:%08lx: create process %s @%p\n",
	de->dwProcessId, de->dwThreadId,
	buffer,
	de->u.CreateProcessInfo.lpStartAddress);

	if (DEBUG_GetProcess(de->dwProcessId) != NULL) {
	TRACE("Skipping already defined process\n");
	break;
	}
	DEBUG_CurrProcess = DEBUG_AddProcess(de->dwProcessId,
	de->u.CreateProcessInfo.hProcess);
	if (DEBUG_CurrProcess == NULL) {
	ERR("Unknown process\n");
	break;
	}

	TRACE("%08lx:%08lx: create thread I @%p\n", de->dwProcessId, de->dwThreadId,
	de->u.CreateProcessInfo.lpStartAddress);

	DEBUG_CurrThread = DEBUG_AddThread(DEBUG_CurrProcess,
	de->dwThreadId,
	de->u.CreateProcessInfo.hThread,
	de->u.CreateProcessInfo.lpStartAddress,
	de->u.CreateProcessInfo.lpThreadLocalBase);
	if (!DEBUG_CurrThread) {
	ERR("Couldn't create thread\n");
	break;
	}

	DEBUG_InitCurrProcess();
	DEBUG_InitCurrThread();
	#ifdef _WE_SUPPORT_THE_STAB_TYPES_USED_BY_MINGW_TOO
	/* so far, process name is not set */
	DEBUG_RegisterDebugInfo((DWORD)de->u.CreateProcessInfo.lpBaseOfImage,
	"wine-exec");
	#endif
	break;

	case EXIT_THREAD_DEBUG_EVENT:
	TRACE("%08lx:%08lx: exit thread (%ld)\n",
	de->dwProcessId, de->dwThreadId, de->u.ExitThread.dwExitCode);

	if (DEBUG_CurrThread == NULL) {
	ERR("Unknown thread\n");
	break;
	}
	/* FIXME: remove break point set on thread startup */
	DEBUG_DelThread(DEBUG_CurrThread);
	break;

	case EXIT_PROCESS_DEBUG_EVENT:
	TRACE("%08lx:%08lx: exit process (%ld)\n",
	de->dwProcessId, de->dwThreadId, de->u.ExitProcess.dwExitCode);

	if (DEBUG_CurrProcess == NULL) {
	ERR("Unknown process\n");
	break;
	}
	/* kill last thread */
	DEBUG_DelThread(DEBUG_CurrProcess->threads);
	/* FIXME: remove break point set on thread startup */
	DEBUG_DelProcess(DEBUG_CurrProcess);
	break;

	case LOAD_DLL_DEBUG_EVENT:
	if (DEBUG_CurrThread == NULL) {
	ERR("Unknown thread\n");
	break;
	}
	DEBUG_ProcessGetStringIndirect(buffer, sizeof(buffer),
	DEBUG_CurrThread->process->handle,
	de->u.LoadDll.lpImageName);

	/* FIXME unicode: de->u.LoadDll.fUnicode */
	TRACE("%08lx:%08lx: loads DLL %s @%p\n", de->dwProcessId, de->dwThreadId,
	buffer, de->u.LoadDll.lpBaseOfDll);
	CharUpperA(buffer);
	DEBUG_LoadModule32( buffer, (DWORD)de->u.LoadDll.lpBaseOfDll);
	break;

	case UNLOAD_DLL_DEBUG_EVENT:
	TRACE("%08lx:%08lx: unload DLL @%p\n", de->dwProcessId, de->dwThreadId,
	de->u.UnloadDll.lpBaseOfDll);
	break;

	case OUTPUT_DEBUG_STRING_EVENT:
	if (DEBUG_CurrThread == NULL) {
	ERR("Unknown thread\n");
	break;
	}

	DEBUG_ProcessGetString(buffer, sizeof(buffer),
	DEBUG_CurrThread->process->handle,
	de->u.DebugString.lpDebugStringData);

	/* fixme unicode de->u.DebugString.fUnicode ? */
	TRACE("%08lx:%08lx: output debug string (%s)\n",
	de->dwProcessId, de->dwThreadId,
	buffer);
	break;

	case RIP_EVENT:
	TRACE("%08lx:%08lx: rip error=%ld type=%ld\n",
	de->dwProcessId, de->dwThreadId, de->u.RipInfo.dwError,
	de->u.RipInfo.dwType);
	break;

	default:
	TRACE("%08lx:%08lx: unknown event (%ld)\n",
	de->dwProcessId, de->dwThreadId, de->dwDebugEventCode);
	}

	} __EXCEPT(wine_dbg) {
	cont = 0;
	}
	__ENDTRY;

	return cont;
	}

	static DWORD CALLBACK DEBUG_MainLoop(DWORD pid)
	{
	DEBUG_EVENT de;
	DWORD cont;

	DEBUG_Init();

	while (WaitForDebugEvent(&de, INFINITE)) {
	cont = DEBUG_HandleDebugEvent(&de);
	ContinueDebugEvent(de.dwProcessId, de.dwThreadId, cont);
	}

	TRACE("WineDbg terminated on pid %ld\n", pid);

	return 0L;
	}

	static DWORD CALLBACK DEBUG_StarterFromPID(LPVOID pid)
	{
	TRACE("WineDbg started on pid %ld\n", (DWORD)pid);

	if (!DebugActiveProcess((DWORD)pid)) {
	TRACE("Can't debug process %ld: %ld\n", (DWORD)pid, GetLastError());
	return 0;
	}
	return DEBUG_MainLoop((DWORD)pid);
	}

	void DEBUG_Attach(DWORD pid)
	{
	CreateThread(NULL, 0, DEBUG_StarterFromPID, (LPVOID)pid, 0, NULL);
	}

	struct dsfcl {
	HANDLE hEvent;
	LPSTR lpCmdLine;
	int showWindow;
	DWORD error;
	};

	static DWORD CALLBACK DEBUG_StarterFromCmdLine(LPVOID p)
	{
	PROCESS_INFORMATION info;
	STARTUPINFOA startup;
	BOOL ok = TRUE;

	memset(&startup, 0, sizeof(startup));
	startup.cb = sizeof(startup);
	startup.dwFlags = STARTF_USESHOWWINDOW;
	startup.wShowWindow = ((struct dsfcl*)p)->showWindow;

	/* any value >= 32 will do, simulate a correct handle value */
	((struct dsfcl*)p)->error = 0xFFFFFFFF;
	if (!CreateProcessA(NULL, ((struct dsfcl*)p)->lpCmdLine, NULL, NULL,
	FALSE, DEBUG_PROCESS, NULL, NULL, &startup, &info)) {
	((struct dsfcl*)p)->error = GetLastError();
	ok = FALSE;
	}
	SetEvent(((struct dsfcl*)p)->hEvent);
	if (ok) DEBUG_MainLoop(info.dwProcessId);

	return 0;
	}

	DWORD DEBUG_WinExec(LPSTR lpCmdLine, int sw)
	{
	struct dsfcl s;
	BOOL ret;

	if ((s.hEvent = CreateEventA(NULL, FALSE, FALSE, NULL))) {
	s.lpCmdLine = lpCmdLine;
	s.showWindow = sw;
	if (CreateThread(NULL, 0, DEBUG_StarterFromCmdLine, (LPVOID)&s, 0, NULL)) {
	WaitForSingleObject(s.hEvent, INFINITE);
	ret = s.error;
	} else {
	ret = 3; /* (dummy) error value for non created thread */
	}
	CloseHandle(s.hEvent);
	} else {
	ret = 1; /* (dummy) error value for non created event */
	}
	return ret;
	}