New python events: inferior call, register/memory changed.
gdb/ChangeLog: * NEWS: Mention new Python events. * Makefile.in (SUBDIR_PYTHON_OBS): Add py-infevents.o. (SUBDIR_PYTHON_SRCS): Add py-infevents.c. (py-infevents.o): New rule. * doc/observer.texi (inferior_call_pre, inferior_call_post) (memory_changed, register_changed): New observers. * infcall.c (call_function_by_hand): Notify observer before and after inferior call. * python/py-event.h (inferior_call_kind): New enum. (emit_inferior_call_event): New prototype. (emit_register_changed_event): New prototype. (emit_memory_changed_event): New prototype. * python/py-events.h (events_object): New registries inferior_call, memory_changed and register_changed. * python/py-evts.c (gdbpy_initialize_py_events): Add the inferior_call, memory_changed and register_changed registries. * python/py-infevents.c: New. * python/py-inferior.c (python_on_inferior_call_pre) (python_on_inferior_call_post, python_on_register_change) (python_on_memory_change): New functions. (gdbpy_initialize_inferior): Attach python handler to new observers. * python/py-infthread.c(gdbpy_create_ptid_object): New. (thpy_get_ptid) Use gdbpy_create_ptid_object. * python/python-internal.h: (gdbpy_create_ptid_object) (gdbpy_initialize_inferior_call_pre_event) (gdbpy_initialize_inferior_call_post_event) (gdbpy_initialize_register_changed_event) (gdbpy_initialize_memory_changed_event): New prototypes. * python/python.c (_initialize_python): Initialize new events. * valops.c (value_assign): Notify register_changed observer. gdb/doc/ChangeLog: * python.texi (Events In Python): Document new events InferiorCallPreEvent, InferiorCallPostEvent, MemoryChangedEvent and RegisterChangedEvent. gdb/testsuite/ChangeLog: * gdb.python/py-events.py (inferior_call_handler): New. (register_changed_handler, memory_changed_handler): New. (test_events.invoke): Register new handlers. * gdb.python/py-events.exp: Add tests for inferior call, memory_changed and register_changed events.
This commit is contained in:
Nick Bull
Doug Evans
parent
71dd4b30a7
commit
162078c893
19 changed files with 682 additions and 14 deletions
263
gdb/python/py-infevents.c
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263
gdb/python/py-infevents.c
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/* Python interface to inferior function events.
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Copyright (C) 2013, 2014 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "py-event.h"
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static PyTypeObject inferior_call_pre_event_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
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static PyTypeObject inferior_call_post_event_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
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static PyTypeObject register_changed_event_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
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static PyTypeObject memory_changed_event_object_type
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CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
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/* Construct either a gdb.InferiorCallPreEvent or a
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gdb.InferiorCallPostEvent. */
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static PyObject *
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create_inferior_call_event_object (inferior_call_kind flag, ptid_t ptid,
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CORE_ADDR addr)
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{
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int pid;
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long tid, lwp;
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PyObject *event;
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PyObject *ptid_obj = NULL;
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PyObject *addr_obj = NULL;
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int failed;
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struct cleanup *cleanups;
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struct cleanup *member_cleanups;
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switch (flag)
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{
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case INFERIOR_CALL_PRE:
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event = create_event_object (&inferior_call_pre_event_object_type);
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break;
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case INFERIOR_CALL_POST:
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event = create_event_object (&inferior_call_post_event_object_type);
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break;
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default:
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return NULL;
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}
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cleanups = make_cleanup_py_decref (event);
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ptid_obj = gdbpy_create_ptid_object (ptid);
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if (ptid_obj == NULL)
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goto fail;
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member_cleanups = make_cleanup_py_decref (ptid_obj);
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failed = evpy_add_attribute (event, "ptid", ptid_obj) < 0;
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if (failed)
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goto fail;
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addr_obj = PyLong_FromLongLong (addr);
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if (addr_obj == NULL)
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goto fail;
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make_cleanup_py_decref (addr_obj);
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failed = evpy_add_attribute (event, "address", addr_obj) < 0;
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if (failed)
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goto fail;
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do_cleanups (member_cleanups);
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discard_cleanups (cleanups);
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return event;
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fail:
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do_cleanups (cleanups);
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return NULL;
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}
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/* Construct a gdb.RegisterChangedEvent containing the affected
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register number. */
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static PyObject *
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create_register_changed_event_object (struct frame_info *frame,
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int regnum)
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{
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PyObject *event;
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PyObject *frame_obj = NULL;
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PyObject *regnum_obj = NULL;
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int failed;
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struct cleanup *cleanups;
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struct cleanup *member_cleanups;
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event = create_event_object (®ister_changed_event_object_type);
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if (event == NULL)
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return NULL;
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cleanups = make_cleanup_py_decref (event);
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frame_obj = frame_info_to_frame_object (frame);
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if (frame_obj == NULL)
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goto fail;
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member_cleanups = make_cleanup_py_decref (frame_obj);
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failed = evpy_add_attribute (event, "frame", frame_obj) < 0;
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if (failed)
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goto fail;
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regnum_obj = PyLong_FromLongLong (regnum);
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if (regnum_obj == NULL)
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goto fail;
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make_cleanup_py_decref (regnum_obj);
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failed = evpy_add_attribute (event, "regnum", regnum_obj) < 0;
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if (failed)
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goto fail;
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do_cleanups (member_cleanups);
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discard_cleanups (cleanups);
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return event;
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fail:
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do_cleanups (cleanups);
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return NULL;
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}
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/* Construct a gdb.MemoryChangedEvent describing the extent of the
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affected memory. */
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static PyObject *
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create_memory_changed_event_object (CORE_ADDR addr, ssize_t len)
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{
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PyObject *event;
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PyObject *addr_obj = NULL;
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PyObject *len_obj = NULL;
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int failed;
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struct cleanup *cleanups;
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struct cleanup *member_cleanups;
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event = create_event_object (&memory_changed_event_object_type);
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if (event == NULL)
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return NULL;
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cleanups = make_cleanup_py_decref (event);
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addr_obj = PyLong_FromLongLong (addr);
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if (addr_obj == NULL)
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goto fail;
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member_cleanups = make_cleanup_py_decref (addr_obj);
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failed = evpy_add_attribute (event, "address", addr_obj) < 0;
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if (failed)
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goto fail;
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len_obj = PyLong_FromLong (len);
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if (len_obj == NULL)
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goto fail;
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make_cleanup_py_decref (len_obj);
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failed = evpy_add_attribute (event, "length", len_obj) < 0;
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if (failed)
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goto fail;
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do_cleanups (member_cleanups);
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discard_cleanups (cleanups);
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return event;
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fail:
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do_cleanups (cleanups);
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return NULL;
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}
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/* Callback function which notifies observers when an event occurs which
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calls a function in the inferior.
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This function will create a new Python inferior-call event object.
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Return -1 if emit fails. */
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int
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emit_inferior_call_event (inferior_call_kind flag, ptid_t thread,
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CORE_ADDR addr)
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{
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PyObject *event;
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if (evregpy_no_listeners_p (gdb_py_events.inferior_call))
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return 0;
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event = create_inferior_call_event_object (flag, thread, addr);
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if (event != NULL)
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return evpy_emit_event (event, gdb_py_events.inferior_call);
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return -1;
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}
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/* Callback when memory is modified by the user. This function will
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create a new Python memory changed event object. */
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int
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emit_memory_changed_event (CORE_ADDR addr, ssize_t len)
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{
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PyObject *event;
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if (evregpy_no_listeners_p (gdb_py_events.memory_changed))
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return 0;
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event = create_memory_changed_event_object (addr, len);
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if (event != NULL)
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return evpy_emit_event (event, gdb_py_events.memory_changed);
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return -1;
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}
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/* Callback when a register is modified by the user. This function
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will create a new Python register changed event object. */
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int
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emit_register_changed_event (struct frame_info* frame, int regnum)
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{
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PyObject *event;
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if (evregpy_no_listeners_p (gdb_py_events.register_changed))
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return 0;
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event = create_register_changed_event_object (frame, regnum);
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if (event != NULL)
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return evpy_emit_event (event, gdb_py_events.register_changed);
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return -1;
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}
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GDBPY_NEW_EVENT_TYPE (inferior_call_pre,
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"gdb.InferiorCallPreEvent",
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"InferiorCallPreEvent",
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"GDB inferior function pre-call event object",
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event_object_type,
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static);
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GDBPY_NEW_EVENT_TYPE (inferior_call_post,
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"gdb.InferiorCallPostEvent",
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"InferiorCallPostEvent",
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"GDB inferior function post-call event object",
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event_object_type,
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static);
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GDBPY_NEW_EVENT_TYPE (register_changed,
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"gdb.RegisterChangedEvent",
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"RegisterChangedEvent",
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"GDB register change event object",
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event_object_type,
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static);
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GDBPY_NEW_EVENT_TYPE (memory_changed,
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"gdb.MemoryChangedEvent",
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"MemoryChangedEvent",
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"GDB memory change event object",
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event_object_type,
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static);
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