tdf#97087 GDB pretty print the Scheduler task list

In addition to the GDB pretty printer, this annotates a lot more
Timers and Idles.

Change-Id: I5b93fab02161b23bb753e65ef92643a04fb0789c

1 files changed, 90 insertions, 0 deletions

diff --git a/solenv/gdb/libreoffice/vcl.py b/solenv/gdb/libreoffice/vcl.py
new file mode 100644
index 000000000000..83f405758216
--- /dev/null
+++ b/solenv/gdb/libreoffice/vcl.py
@@ -0,0 +1,90 @@
+# -*- tab-width: 4; indent-tabs-mode: nil; py-indent-offset: 4 -*-
+#
+# This file is part of the LibreOffice project.
+#
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+#
+
+import six
+import gdb
+from libreoffice.util import printing
+
+class ImplSchedulerDataPrinter(object):
+    '''Prints the ImplSchedulerData linked list.
+
+       This can be used to dump the current state of the scheduler via:
+          p *ImplGetSVData()->mpFirstSchedulerData
+    '''
+
+    def __init__(self, typename, value):
+        self.typename = typename
+        self.value = value
+        self.timer_type_ptr = gdb.lookup_type("Timer").pointer()
+        self.idle_type_ptr = gdb.lookup_type("Idle").pointer()
+
+    def as_string(self, gdbobj):
+        if gdbobj['mpScheduler']:
+            sched = gdbobj['mpScheduler'].dereference()
+            if gdbobj['mpScheduler'].dynamic_cast( self.timer_type_ptr ):
+                sched_type = "Timer"
+            elif gdbobj['mpScheduler'].dynamic_cast( self.idle_type_ptr ):
+                sched_type = "Idle"
+            else:
+                assert sched_type, "Scheduler object neither Timer nor Idle"
+            res = "{:7s}{:10s} active: {:6s}".format( sched_type, str(sched['mePriority']), str(sched['mbActive']) )
+            name = sched['mpDebugName']
+            if not name:
+                res = res + "   (scheduler debug name not set)"
+            else:
+                res = "{} '{}' ({})".format(res, str(name.string()), str(sched.dynamic_type))
+            return res
+        else:
+            assert gdbobj['mbDelete'], "No scheduler set and not marked for deletion!"
+            return "(no scheduler)"
+
+    def to_string(self):
+        return self.typename
+
+    def children(self):
+        return self._iterator(self)
+
+    def display_hint(self):
+        return 'array'
+
+    class _iterator(six.Iterator):
+
+        def __init__(self, printer):
+            self.pos = 0
+            self.printer = printer
+            self.value = printer.value
+
+        def __iter__(self):
+            return self
+
+        def __next__(self):
+            if not self.value['mpNext']:
+                raise StopIteration()
+
+            pos = str(self.pos)
+            name = "\n  " + self.printer.as_string(self.value)
+            self.value = self.value['mpNext']
+            self.pos += 1
+
+            return (pos, name)
+
+printer = None
+
+def build_pretty_printers():
+    global printer
+
+    printer = printing.Printer("libreoffice/vcl")
+    printer.add('ImplSchedulerData', ImplSchedulerDataPrinter)
+
+def register_pretty_printers(obj):
+    printing.register_pretty_printer(printer, obj)
+
+build_pretty_printers()
+
+# vim:set shiftwidth=4 softtabstop=4 expandtab: