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wine/dlls/kernel32/debugger.c

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/*
* Win32 debugger functions
*
* Copyright (C) 1999 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include <stdio.h>
#include <string.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "winerror.h"
#include "wine/server.h"
#include "kernel_private.h"
#include "wine/debug.h"
#include "wine/exception.h"
WINE_DEFAULT_DEBUG_CHANNEL(debugstr);
/******************************************************************************
* WaitForDebugEvent (KERNEL32.@)
*
* Waits for a debugging event to occur in a process being debugged before
* filling out the debug event structure.
*
* PARAMS
* event [O] Address of structure for event information.
* timeout [I] Number of milliseconds to wait for event.
*
* RETURNS
*
* Returns true if a debug event occurred and false if the call timed out.
*/
BOOL WINAPI WaitForDebugEvent(
LPDEBUG_EVENT event,
DWORD timeout)
{
BOOL ret;
DWORD res;
int i;
for (;;)
{
HANDLE wait = 0;
debug_event_t data;
SERVER_START_REQ( wait_debug_event )
{
req->get_handle = (timeout != 0);
wine_server_set_reply( req, &data, sizeof(data) );
if (!(ret = !wine_server_call_err( req ))) goto done;
if (!wine_server_reply_size(reply)) /* timeout */
{
wait = wine_server_ptr_handle( reply->wait );
ret = FALSE;
goto done;
}
event->dwDebugEventCode = data.code;
event->dwProcessId = (DWORD)reply->pid;
event->dwThreadId = (DWORD)reply->tid;
switch(data.code)
{
case EXCEPTION_DEBUG_EVENT:
if (data.exception.exc_code == DBG_PRINTEXCEPTION_C && data.exception.nb_params >= 2)
{
event->dwDebugEventCode = OUTPUT_DEBUG_STRING_EVENT;
event->u.DebugString.lpDebugStringData = wine_server_get_ptr( data.exception.params[1] );
event->u.DebugString.fUnicode = FALSE;
event->u.DebugString.nDebugStringLength = data.exception.params[0];
break;
}
else if (data.exception.exc_code == DBG_RIPEXCEPTION && data.exception.nb_params >= 2)
{
event->dwDebugEventCode = RIP_EVENT;
event->u.RipInfo.dwError = data.exception.params[0];
event->u.RipInfo.dwType = data.exception.params[1];
break;
}
event->u.Exception.dwFirstChance = data.exception.first;
event->u.Exception.ExceptionRecord.ExceptionCode = data.exception.exc_code;
event->u.Exception.ExceptionRecord.ExceptionFlags = data.exception.flags;
event->u.Exception.ExceptionRecord.ExceptionRecord = wine_server_get_ptr( data.exception.record );
event->u.Exception.ExceptionRecord.ExceptionAddress = wine_server_get_ptr( data.exception.address );
event->u.Exception.ExceptionRecord.NumberParameters = data.exception.nb_params;
for (i = 0; i < data.exception.nb_params; i++)
event->u.Exception.ExceptionRecord.ExceptionInformation[i] = data.exception.params[i];
break;
case CREATE_THREAD_DEBUG_EVENT:
event->u.CreateThread.hThread = wine_server_ptr_handle( data.create_thread.handle );
event->u.CreateThread.lpThreadLocalBase = wine_server_get_ptr( data.create_thread.teb );
event->u.CreateThread.lpStartAddress = wine_server_get_ptr( data.create_thread.start );
break;
case CREATE_PROCESS_DEBUG_EVENT:
event->u.CreateProcessInfo.hFile = wine_server_ptr_handle( data.create_process.file );
event->u.CreateProcessInfo.hProcess = wine_server_ptr_handle( data.create_process.process );
event->u.CreateProcessInfo.hThread = wine_server_ptr_handle( data.create_process.thread );
event->u.CreateProcessInfo.lpBaseOfImage = wine_server_get_ptr( data.create_process.base );
event->u.CreateProcessInfo.dwDebugInfoFileOffset = data.create_process.dbg_offset;
event->u.CreateProcessInfo.nDebugInfoSize = data.create_process.dbg_size;
event->u.CreateProcessInfo.lpThreadLocalBase = wine_server_get_ptr( data.create_process.teb );
event->u.CreateProcessInfo.lpStartAddress = wine_server_get_ptr( data.create_process.start );
event->u.CreateProcessInfo.lpImageName = wine_server_get_ptr( data.create_process.name );
event->u.CreateProcessInfo.fUnicode = data.create_process.unicode;
break;
case EXIT_THREAD_DEBUG_EVENT:
event->u.ExitThread.dwExitCode = data.exit.exit_code;
break;
case EXIT_PROCESS_DEBUG_EVENT:
event->u.ExitProcess.dwExitCode = data.exit.exit_code;
break;
case LOAD_DLL_DEBUG_EVENT:
event->u.LoadDll.hFile = wine_server_ptr_handle( data.load_dll.handle );
event->u.LoadDll.lpBaseOfDll = wine_server_get_ptr( data.load_dll.base );
event->u.LoadDll.dwDebugInfoFileOffset = data.load_dll.dbg_offset;
event->u.LoadDll.nDebugInfoSize = data.load_dll.dbg_size;
event->u.LoadDll.lpImageName = wine_server_get_ptr( data.load_dll.name );
event->u.LoadDll.fUnicode = data.load_dll.unicode;
break;
case UNLOAD_DLL_DEBUG_EVENT:
event->u.UnloadDll.lpBaseOfDll = wine_server_get_ptr( data.unload_dll.base );
break;
}
done:
/* nothing */ ;
}
SERVER_END_REQ;
if (ret) return TRUE;
if (!wait) break;
res = WaitForSingleObject( wait, timeout );
CloseHandle( wait );
if (res != STATUS_WAIT_0) break;
}
SetLastError( ERROR_SEM_TIMEOUT );
return FALSE;
}
/**********************************************************************
* ContinueDebugEvent (KERNEL32.@)
*
* Enables a thread that previously produced a debug event to continue.
*
* PARAMS
* pid [I] The id of the process to continue.
* tid [I] The id of the thread to continue.
* status [I] The rule to apply to unhandled exeptions.
*
* RETURNS
*
* True if the debugger is listed as the processes owner and the process
* and thread are valid.
*/
BOOL WINAPI ContinueDebugEvent(
DWORD pid,
DWORD tid,
DWORD status)
{
BOOL ret;
SERVER_START_REQ( continue_debug_event )
{
req->pid = pid;
req->tid = tid;
req->status = status;
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/**********************************************************************
* DebugActiveProcess (KERNEL32.@)
*
* Attempts to attach the debugger to a process.
*
* PARAMS
* pid [I] The process to be debugged.
*
* RETURNS
*
* True if the debugger was attached to process.
*/
BOOL WINAPI DebugActiveProcess( DWORD pid )
{
BOOL ret;
SERVER_START_REQ( debug_process )
{
req->pid = pid;
req->attach = 1;
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
/**********************************************************************
* DebugActiveProcessStop (KERNEL32.@)
*
* Attempts to detach the debugger from a process.
*
* PARAMS
* pid [I] The process to be detached.
*
* RETURNS
*
* True if the debugger was detached from the process.
*/
BOOL WINAPI DebugActiveProcessStop( DWORD pid )
{
BOOL ret;
SERVER_START_REQ( debug_process )
{
req->pid = pid;
req->attach = 0;
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
static LONG WINAPI debug_exception_handler( EXCEPTION_POINTERS *eptr )
{
EXCEPTION_RECORD *rec = eptr->ExceptionRecord;
return (rec->ExceptionCode == DBG_PRINTEXCEPTION_C) ? EXCEPTION_EXECUTE_HANDLER : EXCEPTION_CONTINUE_SEARCH;
}
/***********************************************************************
* OutputDebugStringA (KERNEL32.@)
*
* Output by an application of an ascii string to a debugger (if attached)
* and program log.
*
* PARAMS
* str [I] The message to be logged and given to the debugger.
*
* RETURNS
*
* Nothing.
*/
void WINAPI OutputDebugStringA( LPCSTR str )
{
static HANDLE DBWinMutex = NULL;
static BOOL mutex_inited = FALSE;
BOOL caught_by_dbg = TRUE;
if (!str) str = "";
WARN("%s\n", debugstr_a(str));
/* raise exception, WaitForDebugEvent() will generate a corresponding debug event */
__TRY
{
ULONG_PTR args[2];
args[0] = strlen(str) + 1;
args[1] = (ULONG_PTR)str;
RaiseException( DBG_PRINTEXCEPTION_C, 0, 2, args );
}
__EXCEPT(debug_exception_handler)
{
caught_by_dbg = FALSE;
}
__ENDTRY
if (caught_by_dbg) return;
/* send string to a system-wide monitor */
if (!mutex_inited)
{
/* first call to OutputDebugString, initialize mutex handle */
static const WCHAR mutexname[] = {'D','B','W','i','n','M','u','t','e','x',0};
HANDLE mutex = CreateMutexExW( NULL, mutexname, 0, SYNCHRONIZE );
if (mutex)
{
if (InterlockedCompareExchangePointer( &DBWinMutex, mutex, 0 ) != 0)
{
/* someone beat us here... */
CloseHandle( mutex );
}
}
mutex_inited = TRUE;
}
if (DBWinMutex)
{
static const WCHAR shmname[] = {'D','B','W','I','N','_','B','U','F','F','E','R',0};
static const WCHAR eventbuffername[] = {'D','B','W','I','N','_','B','U','F','F','E','R','_','R','E','A','D','Y',0};
static const WCHAR eventdataname[] = {'D','B','W','I','N','_','D','A','T','A','_','R','E','A','D','Y',0};
HANDLE mapping;
mapping = OpenFileMappingW( FILE_MAP_WRITE, FALSE, shmname );
if (mapping)
{
LPVOID buffer;
HANDLE eventbuffer, eventdata;
buffer = MapViewOfFile( mapping, FILE_MAP_WRITE, 0, 0, 0 );
eventbuffer = OpenEventW( SYNCHRONIZE, FALSE, eventbuffername );
eventdata = OpenEventW( EVENT_MODIFY_STATE, FALSE, eventdataname );
if (buffer && eventbuffer && eventdata)
{
/* monitor is present, synchronize with other OutputDebugString invocations */
WaitForSingleObject( DBWinMutex, INFINITE );
/* acquire control over the buffer */
if (WaitForSingleObject( eventbuffer, 10000 ) == WAIT_OBJECT_0)
{
int str_len;
struct _mon_buffer_t {
DWORD pid;
char buffer[1];
} *mon_buffer = (struct _mon_buffer_t*) buffer;
str_len = strlen( str );
if (str_len > (4096 - sizeof(DWORD) - 1))
str_len = 4096 - sizeof(DWORD) - 1;
mon_buffer->pid = GetCurrentProcessId();
memcpy( mon_buffer->buffer, str, str_len );
mon_buffer->buffer[str_len] = 0;
/* signal data ready */
SetEvent( eventdata );
}
ReleaseMutex( DBWinMutex );
}
if (buffer)
UnmapViewOfFile( buffer );
if (eventbuffer)
CloseHandle( eventbuffer );
if (eventdata)
CloseHandle( eventdata );
CloseHandle( mapping );
}
}
}
/***********************************************************************
* OutputDebugStringW (KERNEL32.@)
*
* Output by an application of a unicode string to a debugger (if attached)
* and program log.
*
* PARAMS
* str [I] The message to be logged and given to the debugger.
*
* RETURNS
*
* Nothing.
*/
void WINAPI OutputDebugStringW( LPCWSTR str )
{
UNICODE_STRING strW;
STRING strA;
RtlInitUnicodeString( &strW, str );
if (!RtlUnicodeStringToAnsiString( &strA, &strW, TRUE ))
{
OutputDebugStringA( strA.Buffer );
RtlFreeAnsiString( &strA );
}
}
/***********************************************************************
* DebugBreak (KERNEL32.@)
*
* Raises an exception so that a debugger (if attached)
* can take some action.
*/
#if defined(__i386__) || defined(__x86_64__)
__ASM_STDCALL_FUNC( DebugBreak, 0, "jmp " __ASM_NAME("DbgBreakPoint") )
#else
void WINAPI DebugBreak(void)
{
DbgBreakPoint();
}
#endif
/***********************************************************************
* DebugBreakProcess (KERNEL32.@)
*
* Raises an exception so that a debugger (if attached)
* can take some action. Same as DebugBreak, but applies to any process.
*
* PARAMS
* hProc [I] Process to break into.
*
* RETURNS
*
* True if successful.
*/
BOOL WINAPI DebugBreakProcess(HANDLE hProc)
{
BOOL ret, self;
TRACE("(%p)\n", hProc);
SERVER_START_REQ( debug_break )
{
req->handle = wine_server_obj_handle( hProc );
ret = !wine_server_call_err( req );
self = ret && reply->self;
}
SERVER_END_REQ;
if (self) DbgBreakPoint();
return ret;
}
/***********************************************************************
* IsDebuggerPresent (KERNEL32.@)
*
* Allows a process to determine if there is a debugger attached.
*
* PARAMS
*
* RETURNS
*
* True if there is a debugger attached.
*/
BOOL WINAPI IsDebuggerPresent(void)
{
return NtCurrentTeb()->Peb->BeingDebugged;
}
/***********************************************************************
* CheckRemoteDebuggerPresent (KERNEL32.@)
*
* Allows a process to determine if there is a remote debugger
* attached.
*
* PARAMS
*
* RETURNS
*
* TRUE because it is a stub.
*/
BOOL WINAPI CheckRemoteDebuggerPresent(HANDLE process, PBOOL DebuggerPresent)
{
NTSTATUS status;
DWORD_PTR port;
if(!process || !DebuggerPresent)
{
SetLastError(ERROR_INVALID_PARAMETER);
return FALSE;
}
status = NtQueryInformationProcess(process, ProcessDebugPort, &port, sizeof(port), NULL);
if (status != STATUS_SUCCESS)
{
SetLastError(RtlNtStatusToDosError(status));
return FALSE;
}
*DebuggerPresent = !!port;
return TRUE;
}
/***********************************************************************
* DebugSetProcessKillOnExit (KERNEL32.@)
*
* Let a debugger decide whether a debuggee will be killed upon debugger
* termination.
*
* PARAMS
* kill [I] If set to true then kill the process on exit.
*
* RETURNS
* True if successful, false otherwise.
*/
BOOL WINAPI DebugSetProcessKillOnExit(BOOL kill)
{
BOOL ret = FALSE;
SERVER_START_REQ( set_debugger_kill_on_exit )
{
req->kill_on_exit = kill;
ret = !wine_server_call_err( req );
}
SERVER_END_REQ;
return ret;
}
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