Debugger: Remove the RebuildBreakpointModel command flags

This was useful to trigger collective attemptBreakpointSync() in the gdb
engine when gdb did not yet track pending breakpoints by itself.

That's not needed anymore.

Change-Id: I8afd2955070504c6bd6ae6c028b3f006b6eb4d7c
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/debugger/debuggerengine.h

@@ -256,7 +256,6 @@ public:
         ExitRequest = DebuggerCommand::ExitRequest,
         RunRequest = DebuggerCommand::RunRequest,
         LosesChild = DebuggerCommand::LosesChild,
-        RebuildBreakpointModel = DebuggerCommand::RebuildBreakpointModel,
         InUpdateLocals = DebuggerCommand::InUpdateLocals,
         NativeCommand = DebuggerCommand::NativeCommand,
         Silent = DebuggerCommand::Silent

src/plugins/debugger/debuggerprotocol.h

@@ -84,8 +84,6 @@ public:
         ExitRequest = 32,
         // Auto-set inferior shutdown related states.
         LosesChild = 64,
-        // Trigger breakpoint model rebuild when no such commands are pending anymore.
-        RebuildBreakpointModel = 128,
         // This is a native (non-Python) command that's handled directly by the backend.
         NativeCommand = 256,
         // This is a command that needs to be wrapped into -interpreter-exec console

src/plugins/debugger/gdb/gdbengine.cpp

@@ -739,15 +739,6 @@ void GdbEngine::runCommand(const DebuggerCommand &command)
         return;
     }
 
-    if (cmd.flags & RebuildBreakpointModel) {
-        ++m_pendingBreakpointRequests;
-        PENDING_DEBUG("   BREAKPOINT MODEL:" << cmd.function
-                      << "INCREMENTS PENDING TO" << m_pendingBreakpointRequests);
-    } else {
-        PENDING_DEBUG("   OTHER (IN):" << cmd.function
-                      << "LEAVES PENDING BREAKPOINT AT" << m_pendingBreakpointRequests);
-    }
-
     if (cmd.flags & (NeedsTemporaryStop|NeedsFullStop)) {
         showMessage("RUNNING NEEDS-STOP COMMAND " + cmd.function);
         const bool wantContinue = bool(cmd.flags & NeedsTemporaryStop);
@@ -769,7 +760,8 @@ void GdbEngine::runCommand(const DebuggerCommand &command)
             requestInterruptInferior();
             return;
         }
-        showMessage("UNSAFE STATE FOR QUEUED COMMAND. EXECUTING IMMEDIATELY");
+        if (state() != InferiorStopOk)
+            showMessage("UNSAFE STATE FOR QUEUED COMMAND. EXECUTING IMMEDIATELY");
     }
 
     if (!(cmd.flags & Discardable))
@@ -1008,18 +1000,6 @@ void GdbEngine::handleResultRecord(DebuggerResponse *response)
     if (cmd.callback)
         cmd.callback(*response);
 
-    if (flags & RebuildBreakpointModel) {
-        --m_pendingBreakpointRequests;
-        PENDING_DEBUG("   BREAKPOINT" << cmd.function);
-        if (m_pendingBreakpointRequests <= 0) {
-            PENDING_DEBUG("\n\n ... AND TRIGGERS BREAKPOINT MODEL UPDATE\n");
-            attemptBreakpointSynchronization();
-        }
-    } else {
-        PENDING_DEBUG("   OTHER (OUT):" << cmd.function
-                      << "LEAVES PENDING BREAKPOINT AT" << m_pendingBreakpointRequests);
-    }
-
     // Continue only if there are no commands wire anymore, so this will
     // be fully synchronous.
     // This is somewhat inefficient, as it makes the last command synchronous.
@@ -2366,7 +2346,7 @@ void GdbEngine::handleBreakInsert1(const DebuggerResponse &response, Breakpoint
             const GdbMi mainbkpt = response.data["bkpt"];
             bp.notifyBreakpointRemoveProceeding();
             DebuggerCommand cmd("-break-delete " + mainbkpt["number"].data());
-            cmd.flags = NeedsTemporaryStop | RebuildBreakpointModel;
+            cmd.flags = NeedsTemporaryStop;
             runCommand(cmd);
             bp.notifyBreakpointRemoveOk();
             return;
@@ -2393,14 +2373,14 @@ void GdbEngine::handleBreakInsert1(const DebuggerResponse &response, Breakpoint
         const int lineNumber = bp.lineNumber();
         DebuggerCommand cmd("trace \"" + GdbMi::escapeCString(fileName) + "\":"
                             + QString::number(lineNumber),
-                            NeedsTemporaryStop | RebuildBreakpointModel);
+                            NeedsTemporaryStop);
         runCommand(cmd);
     } else {
         // Some versions of gdb like "GNU gdb (GDB) SUSE (6.8.91.20090930-2.4)"
         // know how to do pending breakpoints using CLI but not MI. So try
         // again with MI.
         DebuggerCommand cmd("break " + breakpointLocation2(bp.parameters()),
-                            NeedsTemporaryStop | RebuildBreakpointModel);
+                            NeedsTemporaryStop);
         cmd.callback = [this, bp](const DebuggerResponse &r) { handleBreakInsert2(r, bp); };
         runCommand(cmd);
     }
@@ -2559,7 +2539,7 @@ void GdbEngine::insertBreakpoint(Breakpoint bp)
     } else if (type == BreakpointAtFork) {
         cmd.function = "catch fork";
         cmd.callback = handleCatch;
-        cmd.flags = NeedsTemporaryStop | RebuildBreakpointModel;
+        cmd.flags = NeedsTemporaryStop;
         runCommand(cmd);
         // Another one...
         cmd.function = "catch vfork";
@@ -2596,7 +2576,7 @@ void GdbEngine::insertBreakpoint(Breakpoint bp)
         cmd.function += breakpointLocation(bp.parameters());
         cmd.callback = [this, bp](const DebuggerResponse &r) { handleBreakInsert1(r, bp); };
     }
-    cmd.flags = NeedsTemporaryStop | RebuildBreakpointModel;
+    cmd.flags = NeedsTemporaryStop;
     runCommand(cmd);
 }
 
@@ -2645,7 +2625,7 @@ void GdbEngine::changeBreakpoint(Breakpoint bp)
         bp.notifyBreakpointChangeOk();
         return;
     }
-    cmd.flags = NeedsTemporaryStop | RebuildBreakpointModel;
+    cmd.flags = NeedsTemporaryStop;
     runCommand(cmd);
 }
 
@@ -2673,7 +2653,7 @@ void GdbEngine::removeBreakpoint(Breakpoint bp)
         // We already have a fully inserted breakpoint.
         bp.notifyBreakpointRemoveProceeding();
         showMessage(QString("DELETING BP %1 IN %2").arg(br.id.toString()).arg(bp.fileName()));
-        DebuggerCommand cmd("-break-delete " + br.id.toString(), NeedsTemporaryStop | RebuildBreakpointModel);
+        DebuggerCommand cmd("-break-delete " + br.id.toString(), NeedsTemporaryStop);
         runCommand(cmd);
 
         // Pretend it succeeds without waiting for response. Feels better.
@@ -4922,8 +4902,6 @@ void GdbEngine::handleCoreRoundTrip(const DebuggerResponse &response)
 
 void GdbEngine::doUpdateLocals(const UpdateParameters &params)
 {
-    m_pendingBreakpointRequests = 0;
-
     watchHandler()->notifyUpdateStarted(params);
 
     DebuggerCommand cmd("fetchVariables", Discardable|InUpdateLocals);

src/plugins/debugger/gdb/gdbengine.h

@@ -159,8 +159,6 @@ private: ////////// General Interface //////////
     int m_oldestAcceptableToken = -1;
     int m_nonDiscardableCount = 0;
 
-    int m_pendingBreakpointRequests = 0; // Watch updating commands in flight
-
     typedef void (GdbEngine::*CommandsDoneCallback)();
     // This function is called after all previous responses have been received.
     CommandsDoneCallback m_commandsDoneCallback = nullptr;