Debugger: Fix LLDB-DAP attach to process

Change-Id: I464db537d85de7bce943334379b6ce499b32dc2b
Reviewed-by: Artem Sokolovskii <artem.sokolovskii@qt.io>

src/plugins/debugger/dap/dapclient.cpp

@@ -237,6 +237,8 @@ void DapClient::emitSignals(const QJsonDocument &doc)
             type = DapResponseType::SetBreakpoints;
         } else if (command == "setFunctionBreakpoints") {
             type = DapResponseType::SetFunctionBreakpoints;
+        } else if (command == "attach") {
+            type = DapResponseType::Attach;
         }
         emit responseReady(type, ob);
         return;

src/plugins/debugger/dap/dapclient.h

@@ -54,6 +54,7 @@ enum class DapResponseType
     Evaluate,
     SetBreakpoints,
     SetFunctionBreakpoints,
+    Attach,
     Unknown
 };
 

src/plugins/debugger/dap/dapengine.cpp

@@ -692,6 +692,9 @@ void DapEngine::handleResponse(DapResponseType type, const QJsonObject &response
     case DapResponseType::SetBreakpoints:
         handleBreakpointResponse(response);
         break;
+    case DapResponseType::Attach:
+        notifyInferiorRunOk();
+        break;
     default:
         showMessage("UNKNOWN RESPONSE:" + command);
     };

src/plugins/debugger/dap/lldbdapengine.cpp

@@ -120,7 +120,15 @@ void LldbDapEngine::handleDapInitialize()
     }
 
     QTC_ASSERT(state() == EngineRunRequested, qCDebug(logCategory()) << state());
-    m_dapClient->postRequest("attach", QJsonObject{{"__restart", ""}});
+
+    const DebuggerRunParameters &rp = runParameters();
+    m_dapClient->postRequest(
+        "attach",
+        QJsonObject{
+            {"program", rp.inferior.command.executable().path()},
+            {"pid", QString::number(rp.attachPID.pid())},
+            {"__restart", ""}});
+
     qCDebug(logCategory()) << "handleDapAttach";
 }
 
@@ -146,9 +154,6 @@ void LldbDapEngine::setupEngine()
     const DebuggerRunParameters &rp = runParameters();
     CommandLine cmd{rp.debugger.command.executable()};
 
-    if (isLocalAttachEngine())
-        cmd.addArgs({"--debugger-pid", QString::number(rp.attachPID.pid())});
-
     IDataProvider *dataProvider =  new ProcessDataProvider(rp, cmd, this);
     m_dapClient = new LldbDapClient(dataProvider, this);