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kernel32: Send debug strings to system-wide monitor.

This commit is contained in:
Andrey Turkin 2009-10-05 21:42:36 +04:00 committed by Alexandre Julliard
parent 3eaecf0476
commit 02ce96f425
1 changed files with 79 additions and 0 deletions
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79
dlls/kernel32/debugger.c
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@ -240,6 +240,10 @@ BOOL WINAPI DebugActiveProcessStop( DWORD pid )
*/
void WINAPI OutputDebugStringA( LPCSTR str )
{
static HANDLE DBWinMutex = NULL;
static BOOL mutex_inited = FALSE;
/* send string to attached debugger */
SERVER_START_REQ( output_debug_string )
{
req->string = wine_server_client_ptr( str );
@ -247,7 +251,82 @@ void WINAPI OutputDebugStringA( LPCSTR str )
wine_server_call( req );
}
SERVER_END_REQ;
WARN("%s\n", str);
/* send string to a system-wide monitor */
/* FIXME should only send to monitor if no debuggers are attached */
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 invokations */
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 );
}
}
}