Reverting: Several changes to fix debug_stub:... (issue6489005)...

src/trusted/debug_stub/win/thread_impl.cc

 /*
  * Copyright 2010 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can
  * be found in the LICENSE file.
  */
 
 #include <assert.h>
 #include <windows.h>
 #include <exception>
 #include <stdexcept>
@@ skipping 291 matching lines @@
 
     return true;
   }
 
   virtual void* GetContext() { return &context_; }
 
   static LONG NTAPI ExceptionCatch(PEXCEPTION_POINTERS ep) {
     uint32_t id = static_cast<uint32_t>(GetCurrentThreadId());
     Thread* thread = static_cast<Thread*>(Acquire(id));
 
-    // This 2 lineas are a fix for the bug:
-    // 366: Linux GDB doesn't work for Chrome
-    // http://code.google.com/p/nativeclient/issues/detail?id=366
-    // When debug stub thread opens socket to listen (for RSP debugger),
-    // it triggers some component to send DBG_PRINTEXCEPTION(with string
-    // "swi_lsp: non-browser app; disable"), then VEH handler goes into wait
-    // for debugger to resolve exception.
-    // But debugger is not connected, and debug thread is not listening on
-    // connection! It get stuck.
-    // Ignoring this exception - for now - helps debug stub start on chrome.
-    // Now it can listen on RSP connection and can get debugger connected etc.
-    if (DBG_PRINTEXCEPTION_C == ep->ExceptionRecord->ExceptionCode) {
-      return EXCEPTION_CONTINUE_EXECUTION;
-    }
-
     // If we are not tracking this thread, then ignore it
     if (NULL == thread) return EXCEPTION_CONTINUE_SEARCH;
 
     State old_state = thread->state_;
     thread->state_ = SIGNALED;
     int8_t sig = ExceptionToSignal(ep->ExceptionRecord->ExceptionCode);
 
     void *ctx = thread->GetContext();
 
     memcpy(ctx, ep->ContextRecord, sizeof(CONTEXT));
@@ skipping 63 matching lines @@
 
   // Add the new one, at the front of the list
   s_OldCatch = AddVectoredExceptionHandler(1, Thread::ExceptionCatch);
   s_CatchFunc = func;
   s_CatchCookie = cookie;
 }
 
 
 }  // End of port namespace