Modify debugger to understand special undocumented "Name Thread"

debugger/debugger.h

@@ -150,6 +150,23 @@ enum dbg_mode
     MODE_INVALID, MODE_16, MODE_32, MODE_VM86
 };
 
+
+
+/* Wine extension; Windows doesn't have a name for this code.  This is an
+   undocumented exception understood by MS VC debugger, allowing the program
+   to name a particular thread.  Search google.com or deja.com for "0x406d1388"
+   for more info. */
+#define EXCEPTION_NAME_THREAD               0x406D1388
+
+/* Helper structure */
+typedef struct tagTHREADNAME_INFO
+{
+   DWORD   dwType;     /* Must be 0x1000 */
+   LPCTSTR szName;     /* Pointer to name - limited to 9 bytes (8 characters + terminator) */
+   DWORD   dwThreadID; /* Thread ID (-1 = caller thread) */
+   DWORD   dwFlags;    /* Reserved for future use.  Must be zero. */
+} THREADNAME_INFO;
+
 typedef struct tagDBG_THREAD {
     struct tagDBG_PROCESS*	process;
     HANDLE			handle;
@@ -161,6 +178,7 @@ typedef struct tagDBG_THREAD {
     enum exec_mode 		dbg_exec_mode;
     int 			dbg_exec_count;
     DBG_BREAKPOINT		stepOverBP;
+    char                        name[9];
     struct tagDBG_THREAD* 	next;
     struct tagDBG_THREAD* 	prev;
 } DBG_THREAD;

debugger/winedbg.c

@@ -379,6 +379,9 @@ static	BOOL	DEBUG_HandleException(EXCEPTION_RECORD *rec, BOOL first_chance, BOOL
 {
     BOOL             is_debug = FALSE;
     BOOL             ret = TRUE;
+    THREADNAME_INFO *pThreadName;
+    DBG_THREAD      *pThread;
+
 
     *cont = DBG_CONTINUE;
 
@@ -388,6 +391,19 @@ static	BOOL	DEBUG_HandleException(EXCEPTION_RECORD *rec, BOOL first_chance, BOOL
     case EXCEPTION_SINGLE_STEP:
         is_debug = TRUE;
         break;
+    case EXCEPTION_NAME_THREAD:
+        pThreadName = (THREADNAME_INFO*)(rec->ExceptionInformation);
+        if (pThreadName->dwThreadID == -1)
+            pThread = DEBUG_CurrThread;
+        else
+            pThread = DEBUG_GetThread(DEBUG_CurrProcess, pThreadName->dwThreadID);
+
+        if (ReadProcessMemory(DEBUG_CurrThread->process->handle, pThreadName->szName,
+                              pThread->name, 9, NULL))
+            DEBUG_Printf (DBG_CHN_MESG,
+                          "Thread ID=0x%lx renamed using MS VC6 extension (name==\"%s\")\n",
+                          pThread->tid, pThread->name);
+        return TRUE;
     }
 
     if (first_chance && !force && !DBG_IVAR(BreakOnFirstChance))