Debugger: Don't check for existence of gdb.inferior.threads()

All supported versions have it in that context.

Change-Id: Iafff4760ba521ffc9abc4e05dbbc9263ed6fe21a
Reviewed-by: Orgad Shaneh <orgads@gmail.com>

share/qtcreator/dumper/gbridge.py

@@ -400,7 +400,6 @@ def bbsetup(args = ''):
             result += '{type="%s",formats="%s"},' % (key, value)
     result += ']'
     #result += ',namespace="%s"' % qqNs
-    result += ',hasInferiorThreadList="%s"' % int(hasInferiorThreadList())
     return result
 
 registerCommand("bbsetup", bbsetup)
@@ -572,17 +571,6 @@ def hasPlot():
     return os.path.isfile(fileName) and os.access(fileName, os.X_OK)
 
 
-#
-# Threads
-#
-def hasInferiorThreadList():
-    #return False
-    try:
-        a = gdb.inferiors()[0].threads()
-        return True
-    except:
-        return False
-
 #
 # VTable
 #

src/plugins/debugger/gdb/gdbengine.cpp

@@ -230,7 +230,6 @@ GdbEngine::GdbEngine(const DebuggerStartParameters &startParameters)
     m_hasBreakpointNotifications = false;
     m_hasPython = false;
     m_registerNamesListed = false;
-    m_hasInferiorThreadList = false;
     m_sourcesListUpdating = false;
     m_oldestAcceptableToken = -1;
     m_nonDiscardableCount = 0;
@@ -1875,8 +1874,6 @@ void GdbEngine::handlePythonSetup(const GdbResponse &response)
             }
             watchHandler()->addTypeFormats(type, formats);
         }
-        const GdbMi hasInferiorThreadList = data["hasInferiorThreadList"];
-        m_hasInferiorThreadList = (hasInferiorThreadList.toInt() != 0);
     }
 }
 
@@ -3759,7 +3756,7 @@ void GdbEngine::handleThreadInfo(const GdbResponse &response)
                 selectThread(other);
         }
         updateViews(); // Adjust Threads combobox.
-        if (m_hasInferiorThreadList && debuggerCore()->boolSetting(ShowThreadNames)) {
+        if (m_hasPython && debuggerCore()->boolSetting(ShowThreadNames)) {
             postCommand("threadnames " +
                 debuggerCore()->action(MaximalStackDepth)->value().toByteArray(),
                 Discardable, CB(handleThreadNames));

src/plugins/debugger/gdb/gdbengine.h

@@ -387,7 +387,6 @@ protected:
     bool m_isQnxGdb;
     bool m_hasBreakpointNotifications;
     bool m_hasPython;
-    bool m_hasInferiorThreadList;
 
 private: ////////// Inferior Management //////////