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-rw-r--r--gdb/python/py-infevents.c263
1 files changed, 263 insertions, 0 deletions
diff --git a/gdb/python/py-infevents.c b/gdb/python/py-infevents.c
new file mode 100644
index 0000000..beb0598
--- /dev/null
+++ b/gdb/python/py-infevents.c
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+/* Python interface to inferior function events.
+
+ Copyright (C) 2013, 2014 Free Software Foundation, Inc.
+
+ This file is part of GDB.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include "defs.h"
+#include "py-event.h"
+
+static PyTypeObject inferior_call_pre_event_object_type
+ CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
+static PyTypeObject inferior_call_post_event_object_type
+ CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
+static PyTypeObject register_changed_event_object_type
+ CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
+static PyTypeObject memory_changed_event_object_type
+ CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
+
+/* Construct either a gdb.InferiorCallPreEvent or a
+ gdb.InferiorCallPostEvent. */
+
+static PyObject *
+create_inferior_call_event_object (inferior_call_kind flag, ptid_t ptid,
+ CORE_ADDR addr)
+{
+ int pid;
+ long tid, lwp;
+ PyObject *event;
+ PyObject *ptid_obj = NULL;
+ PyObject *addr_obj = NULL;
+ int failed;
+ struct cleanup *cleanups;
+ struct cleanup *member_cleanups;
+
+ switch (flag)
+ {
+ case INFERIOR_CALL_PRE:
+ event = create_event_object (&inferior_call_pre_event_object_type);
+ break;
+ case INFERIOR_CALL_POST:
+ event = create_event_object (&inferior_call_post_event_object_type);
+ break;
+ default:
+ return NULL;
+ }
+
+ cleanups = make_cleanup_py_decref (event);
+
+ ptid_obj = gdbpy_create_ptid_object (ptid);
+ if (ptid_obj == NULL)
+ goto fail;
+ member_cleanups = make_cleanup_py_decref (ptid_obj);
+
+ failed = evpy_add_attribute (event, "ptid", ptid_obj) < 0;
+ if (failed)
+ goto fail;
+
+ addr_obj = PyLong_FromLongLong (addr);
+ if (addr_obj == NULL)
+ goto fail;
+ make_cleanup_py_decref (addr_obj);
+
+ failed = evpy_add_attribute (event, "address", addr_obj) < 0;
+ if (failed)
+ goto fail;
+
+ do_cleanups (member_cleanups);
+ discard_cleanups (cleanups);
+ return event;
+
+ fail:
+ do_cleanups (cleanups);
+ return NULL;
+}
+
+/* Construct a gdb.RegisterChangedEvent containing the affected
+ register number. */
+
+static PyObject *
+create_register_changed_event_object (struct frame_info *frame,
+ int regnum)
+{
+ PyObject *event;
+ PyObject *frame_obj = NULL;
+ PyObject *regnum_obj = NULL;
+ int failed;
+ struct cleanup *cleanups;
+ struct cleanup *member_cleanups;
+
+ event = create_event_object (&register_changed_event_object_type);
+ if (event == NULL)
+ return NULL;
+
+ cleanups = make_cleanup_py_decref (event);
+
+ frame_obj = frame_info_to_frame_object (frame);
+ if (frame_obj == NULL)
+ goto fail;
+ member_cleanups = make_cleanup_py_decref (frame_obj);
+
+ failed = evpy_add_attribute (event, "frame", frame_obj) < 0;
+ if (failed)
+ goto fail;
+
+ regnum_obj = PyLong_FromLongLong (regnum);
+ if (regnum_obj == NULL)
+ goto fail;
+ make_cleanup_py_decref (regnum_obj);
+
+ failed = evpy_add_attribute (event, "regnum", regnum_obj) < 0;
+ if (failed)
+ goto fail;
+
+ do_cleanups (member_cleanups);
+ discard_cleanups (cleanups);
+ return event;
+
+ fail:
+ do_cleanups (cleanups);
+ return NULL;
+}
+
+/* Construct a gdb.MemoryChangedEvent describing the extent of the
+ affected memory. */
+
+static PyObject *
+create_memory_changed_event_object (CORE_ADDR addr, ssize_t len)
+{
+ PyObject *event;
+ PyObject *addr_obj = NULL;
+ PyObject *len_obj = NULL;
+ int failed;
+ struct cleanup *cleanups;
+ struct cleanup *member_cleanups;
+
+ event = create_event_object (&memory_changed_event_object_type);
+
+ if (event == NULL)
+ return NULL;
+ cleanups = make_cleanup_py_decref (event);
+
+ addr_obj = PyLong_FromLongLong (addr);
+ if (addr_obj == NULL)
+ goto fail;
+ member_cleanups = make_cleanup_py_decref (addr_obj);
+
+ failed = evpy_add_attribute (event, "address", addr_obj) < 0;
+ if (failed)
+ goto fail;
+
+ len_obj = PyLong_FromLong (len);
+ if (len_obj == NULL)
+ goto fail;
+ make_cleanup_py_decref (len_obj);
+
+ failed = evpy_add_attribute (event, "length", len_obj) < 0;
+ if (failed)
+ goto fail;
+
+ do_cleanups (member_cleanups);
+ discard_cleanups (cleanups);
+ return event;
+
+ fail:
+ do_cleanups (cleanups);
+ return NULL;
+}
+
+/* Callback function which notifies observers when an event occurs which
+ calls a function in the inferior.
+ This function will create a new Python inferior-call event object.
+ Return -1 if emit fails. */
+
+int
+emit_inferior_call_event (inferior_call_kind flag, ptid_t thread,
+ CORE_ADDR addr)
+{
+ PyObject *event;
+
+ if (evregpy_no_listeners_p (gdb_py_events.inferior_call))
+ return 0;
+
+ event = create_inferior_call_event_object (flag, thread, addr);
+ if (event != NULL)
+ return evpy_emit_event (event, gdb_py_events.inferior_call);
+ return -1;
+}
+
+/* Callback when memory is modified by the user. This function will
+ create a new Python memory changed event object. */
+
+int
+emit_memory_changed_event (CORE_ADDR addr, ssize_t len)
+{
+ PyObject *event;
+
+ if (evregpy_no_listeners_p (gdb_py_events.memory_changed))
+ return 0;
+
+ event = create_memory_changed_event_object (addr, len);
+ if (event != NULL)
+ return evpy_emit_event (event, gdb_py_events.memory_changed);
+ return -1;
+}
+
+/* Callback when a register is modified by the user. This function
+ will create a new Python register changed event object. */
+
+int
+emit_register_changed_event (struct frame_info* frame, int regnum)
+{
+ PyObject *event;
+
+ if (evregpy_no_listeners_p (gdb_py_events.register_changed))
+ return 0;
+
+ event = create_register_changed_event_object (frame, regnum);
+ if (event != NULL)
+ return evpy_emit_event (event, gdb_py_events.register_changed);
+ return -1;
+}
+
+
+GDBPY_NEW_EVENT_TYPE (inferior_call_pre,
+ "gdb.InferiorCallPreEvent",
+ "InferiorCallPreEvent",
+ "GDB inferior function pre-call event object",
+ event_object_type,
+ static);
+
+GDBPY_NEW_EVENT_TYPE (inferior_call_post,
+ "gdb.InferiorCallPostEvent",
+ "InferiorCallPostEvent",
+ "GDB inferior function post-call event object",
+ event_object_type,
+ static);
+
+GDBPY_NEW_EVENT_TYPE (register_changed,
+ "gdb.RegisterChangedEvent",
+ "RegisterChangedEvent",
+ "GDB register change event object",
+ event_object_type,
+ static);
+
+GDBPY_NEW_EVENT_TYPE (memory_changed,
+ "gdb.MemoryChangedEvent",
+ "MemoryChangedEvent",
+ "GDB memory change event object",
+ event_object_type,
+ static);