[PATCH v3 6/8] python: Implement btrace Python bindings for record history.

Tim Wiederhake
2016-11-21T15:49:20Z

This patch implements the gdb.Record Python object methods and fields for
record target btrace. Additionally, add a stub for record target full.

2016-11-21 Tim Wiederhake <tim.wiederhake@intel.com>

gdb/ChangeLog:

* Makefile.in (SUBDIR_PYTHON_OBS): Add py-btrace.o.
(SUBDIR_PYTHON_SRCS): Add py-btrace.c.
* python/py-btrace.c: New file.
* python/py-btrace.h: New file.
* python/python-internal.h (gdbpy_initialize_btrace): New export.
* python/python.c (_initialize_python): Add gdbpy_initialize_btrace.
* record-btrace.c: Add conditional includes for python/py-record.h
and python/py-btrace.h
(record_btrace_python_interface): New function.
(init_record_btrace_ops): Add record_btrace_python_interface.
* record-full.c: Add conditional include for python/py-record.h.
(record_full_python_interface): New function.
(init_record_full_ops): Add record_full_python_interface.

---
gdb/Makefile.in | 2 +
gdb/python/py-btrace.c | 994 +++++++++++++++++++++++++++++++++++++++++++
gdb/python/py-btrace.h | 32 ++
gdb/python/python-internal.h | 2 +
gdb/python/python.c | 1 +
gdb/record-btrace.c | 38 ++
gdb/record-full.c | 20 +
7 files changed, 1089 insertions(+)
create mode 100644 gdb/python/py-btrace.c
create mode 100644 gdb/python/py-btrace.h

diff --git a/gdb/Makefile.in b/gdb/Makefile.in
index 3340b5e..8bc0bf8 100644
--- a/gdb/Makefile.in
+++ b/gdb/Makefile.in
@@ -381,6 +381,7 @@ SUBDIR_PYTHON_OBS = \
py-block.o \
py-bpevent.o \
py-breakpoint.o \
+ py-btrace.o \
py-cmd.o \
py-continueevent.o \
py-xmethods.o \
@@ -422,6 +423,7 @@ SUBDIR_PYTHON_SRCS = \
python/py-block.c \
python/py-bpevent.c \
python/py-breakpoint.c \
+ python/py-btrace.c \
python/py-cmd.c \
python/py-continueevent.c \
python/py-xmethods.c \
diff --git a/gdb/python/py-btrace.c b/gdb/python/py-btrace.c
new file mode 100644
index 0000000..0420ff6
--- /dev/null
+++ b/gdb/python/py-btrace.c
@@ -0,0 +1,994 @@
+/* Python interface to btrace instruction history.
+
+ Copyright 2016 Free Software Foundation, Inc.
+
+ Contributed by Intel Corp. <tim.wiederhake@intel.com>
+
+ 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-btrace.h"
+#include "py-record.h"
+#include "gdbcore.h"
+#include "gdbcmd.h"
+#include "gdbthread.h"
+#include "btrace.h"
+#include "disasm.h"
+
+#if defined (IS_PY3K)
+
+#define BTPY_PYSLICE(x) (x)
+#define PyInt_FromSsize_t PyLong_FromSsize_t
+#define PyInt_FromSize_t PyLong_FromSize_t
+#define PyInt_AsSsize_t PyLong_AsSsize_t
+
+#else
+
+#define BTPY_PYSLICE(x) ((PySliceObject *) x)
+
+#endif
+
+#define BTPY_REQUIRE_VALID_INSN(obj, iter) \
+ do { \
+ struct thread_info *tinfo = find_thread_ptid (obj->ptid); \
+ if (tinfo == NULL || btrace_is_empty (tinfo)) \
+ return PyErr_Format (gdbpy_gdb_error, _("Empty branch trace."));\
+ if (0 == btrace_find_insn_by_number (&iter, &tinfo->btrace, \
+ obj->number)) \
+ return PyErr_Format (gdbpy_gdb_error, _("No such instruction."));\
+ } while (0)
+
+#define BTPY_REQUIRE_VALID_CALL(obj, iter) \
+ do { \
+ struct thread_info *tinfo = find_thread_ptid (obj->ptid); \
+ if (tinfo == NULL || btrace_is_empty (tinfo)) \
+ return PyErr_Format (gdbpy_gdb_error, _("Empty branch trace."));\
+ if (0 == btrace_find_call_by_number (&iter, &tinfo->btrace, \
+ obj->number)) \
+ return PyErr_Format (gdbpy_gdb_error, _("No such call segment."));\
+ } while (0)
+
+/* Python object for btrace records. This can either be an instruction or a
+ function call segment, depending on the chosen type. */
+
+typedef struct {
+ PyObject_HEAD
+
+ /* The thread this object belongs to. */
+ ptid_t ptid;
+
+ /* Instruction number or function call segment number, depending on the type
+ of this object. */
+ Py_ssize_t number;
+} btpy_object;
+
+/* Python object for btrace record lists. */
+
+typedef struct {
+ PyObject_HEAD
+
+ /* The thread this list belongs to. */
+ ptid_t ptid;
+
+ /* The first index being part of this list. */
+ Py_ssize_t first;
+
+ /* The last index begin part of this list. */
+ Py_ssize_t last;
+
+ /* Stride size. */
+ Py_ssize_t step;
+
+ /* Either &BTPY_CALL_TYPE or &BTPY_INSN_TYPE. */
+ PyTypeObject* element_type;
+} btpy_list_object;
+
+/* Python type for btrace instructions. */
+
+static PyTypeObject btpy_insn_type = {
+ PyVarObject_HEAD_INIT (NULL, 0)
+};
+
+/* Python type for btrace function-calls. */
+
+static PyTypeObject btpy_call_type = {
+ PyVarObject_HEAD_INIT (NULL, 0)
+};
+
+/* Python type for btrace lists. */
+
+static PyTypeObject btpy_list_type = {
+ PyVarObject_HEAD_INIT (NULL, 0)
+};
+
+/* Create a new gdb.BtraceInstruction or gdb.BtraceFunctionCall object,
+ depending on TYPE. */
+
+static PyObject *
+btpy_new (ptid_t ptid, Py_ssize_t number, PyTypeObject* type)
+{
+ btpy_object * const obj = PyObject_New (btpy_object, type);
+
+ if (obj == NULL)
+ return NULL;
+
+ obj->ptid = ptid;
+ obj->number = number;
+
+ return (PyObject *) obj;
+}
+
+/* Create a new gdb.BtraceInstruction object. */
+
+static PyObject *
+btpy_insn_new (ptid_t ptid, Py_ssize_t number)
+{
+ return btpy_new (ptid, number, &btpy_insn_type);
+}
+
+/* Create a new gdb.BtraceFunctionCall object. */
+
+static PyObject *
+btpy_call_new (ptid_t ptid, Py_ssize_t number)
+{
+ return btpy_new (ptid, number, &btpy_call_type);
+}
+
+/* Create a new gdb.BtraceList object. */
+
+static PyObject *
+btpy_list_new (ptid_t ptid, Py_ssize_t first, Py_ssize_t last, Py_ssize_t step,
+ PyTypeObject *element_type)
+{
+ btpy_list_object * const obj = PyObject_New (btpy_list_object,
+ &btpy_list_type);
+
+ if (obj == NULL)
+ return NULL;
+
+ obj->ptid = ptid;
+ obj->first = first;
+ obj->last = last;
+ obj->step = step;
+ obj->element_type = element_type;
+
+ return (PyObject *) obj;
+}
+
+/* Implementation of BtraceInstruction.number [int] and
+ BtraceFunctionCall.number [int]. */
+
+static PyObject *
+btpy_number (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+
+ return PyInt_FromSsize_t (obj->number);
+}
+
+/* Implementation of BtraceInstruction.__hash__ () -> int and
+ BtraceFunctionCall.__hash__ () -> int. */
+
+static Py_hash_t
+btpy_hash (PyObject *self)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+
+ return obj->number;
+}
+
+/* Implementation of BtraceInstruction.error [int]. Returns the
+ error code for gaps. */
+
+static PyObject *
+btpy_insn_error (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ struct btrace_insn_iterator iter;
+ int error;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ error = btrace_insn_get_error (&iter);
+
+ if (error == 0)
+ Py_RETURN_NONE;
+
+ return PyInt_FromLong (error);
+}
+
+/* Implementation of BtraceInstruction.symbol [gdb.Symtab_and_line].
+ Return the symbol associated with this instruction. */
+
+static PyObject *
+btpy_insn_symbol (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+ PyObject *result = NULL;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ Py_RETURN_NONE;
+
+ TRY
+ {
+ result = symtab_and_line_to_sal_object (find_pc_line (insn->pc, 0));
+ }
+ CATCH (except, RETURN_MASK_ALL)
+ {
+ GDB_PY_HANDLE_EXCEPTION (except);
+ }
+ END_CATCH
+
+ return result;
+}
+
+/* Implementation of BtraceInstruction.pc [int]. Returns
+ the instruction address. */
+
+static PyObject *
+btpy_insn_pc (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ Py_RETURN_NONE;
+
+ return PyInt_FromSize_t (insn->pc);
+}
+
+/* Implementation of BtraceInstruction.size [int]. Returns
+ the instruction size. */
+
+static PyObject *
+btpy_insn_size (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ Py_RETURN_NONE;
+
+ return PyInt_FromLong (insn->size);
+}
+
+/* Implementation of BtraceInstruction.is_speculative [bool].
+ Returns if this instruction was executed speculatively. */
+
+static PyObject *
+btpy_insn_is_speculative (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ Py_RETURN_NONE;
+
+ if (insn->flags & BTRACE_INSN_FLAG_SPECULATIVE)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+}
+
+/* Implementation of BtraceInstruction.data [buffer].
+ Returns raw instruction data. */
+
+static PyObject *
+btpy_insn_data (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+ gdb_byte *buffer = NULL;
+ PyObject *object;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ Py_RETURN_NONE;
+
+ TRY
+ {
+ buffer = (gdb_byte *) xmalloc (insn->size);
+ read_memory (insn->pc, buffer, insn->size);
+ }
+ CATCH (except, RETURN_MASK_ALL)
+ {
+ xfree (buffer);
+ GDB_PY_HANDLE_EXCEPTION (except);
+ }
+ END_CATCH
+
+ object = PyBytes_FromStringAndSize ((const char*) buffer, insn->size);
+ xfree (buffer);
+
+ if (object == NULL)
+ return NULL;
+
+ return PyMemoryView_FromObject (object);
+}
+
+/* Implementation of BtraceInstruction.decode [str]. Returns
+ the instruction as human readable string. */
+
+static PyObject *
+btpy_insn_decode (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_insn *insn;
+ struct btrace_insn_iterator iter;
+ struct cleanup *cleanup;
+ struct ui_file *strfile;
+ char* buffer;
+ PyObject *object;
+
+ BTPY_REQUIRE_VALID_INSN (obj, iter);
+
+ insn = btrace_insn_get (&iter);
+ if (insn == NULL)
+ {
+ int error_code = btrace_insn_get_error (&iter);
+ const struct btrace_config *config;
+
+ config = btrace_conf (&find_thread_ptid (obj->ptid)->btrace);
+ return PyBytes_FromString (btrace_decode_error (config->format,
+ error_code));
+ }
+
+ strfile = mem_fileopen ();
+ cleanup = make_cleanup_ui_file_delete (strfile);
+
+ gdb_print_insn (target_gdbarch (), insn->pc, strfile, NULL);
+
+ buffer = ui_file_xstrdup (strfile, NULL);
+ make_cleanup (xfree, buffer);
+
+ object = PyBytes_FromString (buffer);
+
+ do_cleanups (cleanup);
+ return object;
+}
+
+/* Implementation of BtraceFunctionCall.level [int]. Returns the
+ call level. */
+
+static PyObject *
+btpy_call_level (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ return PyInt_FromLong (iter.btinfo->level + func->level);
+}
+
+/* Implementation of BtraceFunctionCall.symbol [gdb.Symbol]. Returns
+ the symbol associated with this function call. */
+
+static PyObject *
+btpy_call_symbol (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ if (func->sym == NULL)
+ Py_RETURN_NONE;
+
+ return symbol_to_symbol_object (func->sym);
+}
+
+/* Implementation of BtraceFunctionCall.instructions [list].
+ Return the list of instructions that belong to this function call. */
+
+static PyObject *
+btpy_call_instructions (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+ unsigned int len;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ len = VEC_length (btrace_insn_s, func->insn);
+
+ /* Gaps count as one instruction. */
+ if (len == 0)
+ len = 1;
+
+ return btpy_list_new (obj->ptid, func->insn_offset, func->insn_offset + len,
+ 1, &btpy_insn_type);
+}
+
+/* Implementation of BtraceFunctionCall.up [gdb.BtraceRecordCall].
+ Return the caller / returnee of this function. */
+
+static PyObject *
+btpy_call_up (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ if (func->up == NULL)
+ Py_RETURN_NONE;
+
+ return btpy_call_new (obj->ptid, func->up->number);
+}
+
+/* Implementation of BtraceFunctionCall.prev_sibling [BtraceFunctionCall].
+ Return a previous segment of this function. */
+
+static PyObject *
+btpy_call_prev_sibling (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ if (func->segment.prev == NULL)
+ Py_RETURN_NONE;
+
+ return btpy_call_new (obj->ptid, func->segment.prev->number);
+}
+
+/* Implementation of BtraceFunctionCall.next_sibling [BtraceFunctionCall].
+ Return a following segment of this function. */
+
+static PyObject *
+btpy_call_next_sibling (PyObject *self, void *closure)
+{
+ const btpy_object * const obj = (btpy_object *) self;
+ const struct btrace_function *func;
+ struct btrace_call_iterator iter;
+
+ BTPY_REQUIRE_VALID_CALL (obj, iter);
+
+ func = btrace_call_get (&iter);
+ if (func == NULL)
+ Py_RETURN_NONE;
+
+ if (func->segment.next == NULL)
+ Py_RETURN_NONE;
+
+ return btpy_call_new (obj->ptid, func->segment.next->number);
+}
+
+/* Python rich compare function to allow for equality and inequality checks
+ in Python. */
+
+static PyObject *
+btpy_richcompare (PyObject *self, PyObject *other, int op)
+{
+ const btpy_object * const obj1 = (btpy_object *) self;
+ const btpy_object * const obj2 = (btpy_object *) other;
+
+ if (Py_TYPE (self) != Py_TYPE (other))
+ {
+ Py_INCREF (Py_NotImplemented);
+ return Py_NotImplemented;
+ }
+
+ switch (op)
+ {
+ case Py_EQ:
+ if (ptid_equal (obj1->ptid, obj2->ptid) && obj1->number == obj2->number)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+
+ case Py_NE:
+ if (!ptid_equal (obj1->ptid, obj2->ptid) || obj1->number != obj2->number)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+
+ default:
+ break;
+ }
+
+ Py_INCREF (Py_NotImplemented);
+ return Py_NotImplemented;
+}
+
+/* Implementation of BtraceList.__len__ (self) -> int. */
+
+static Py_ssize_t
+btpy_list_length (PyObject *self)
+{
+ const btpy_list_object * const obj = (btpy_list_object *) self;
+ const Py_ssize_t distance = obj->last - obj->first;
+ const Py_ssize_t result = distance / obj->step;
+
+ if ((distance % obj->step) == 0)
+ return result;
+
+ return result + 1;
+}
+
+/* Implementation of
+ BtraceList.__getitem__ (self, key) -> BtraceInstruction and
+ BtraceList.__getitem__ (self, key) -> BtraceFunctionCall. */
+
+static PyObject *
+btpy_list_item (PyObject *self, Py_ssize_t index)
+{
+ const btpy_list_object * const obj = (btpy_list_object *) self;
+ struct thread_info * const tinfo = find_thread_ptid (obj->ptid);
+
+ if (index < 0 || index >= btpy_list_length (self))
+ return PyErr_Format (PyExc_IndexError, _("Index out of range: %zd."),
+ index);
+
+ return btpy_new (obj->ptid, obj->first + (obj->step * index),
+ obj->element_type);
+}
+
+/* Implementation of BtraceList.__getitem__ (self, slice) -> BtraceList. */
+
+static PyObject *
+btpy_list_slice (PyObject *self, PyObject *value)
+{
+ const btpy_list_object * const obj = (btpy_list_object *) self;
+ const Py_ssize_t length = btpy_list_length (self);
+ Py_ssize_t start, stop, step, slicelength;
+
+ if (PyInt_Check (value))
+ {
+ Py_ssize_t index = PyInt_AsSsize_t (value);
+
+ /* Emulate Python behavior for negative indices. */
+ if (index < 0)
+ index += length;
+
+ return btpy_list_item (self, index);
+ }
+
+ if (!PySlice_Check (value))
+ return PyErr_Format (PyExc_TypeError, _("Index must be int or slice."));
+
+ if (0 != PySlice_GetIndicesEx (BTPY_PYSLICE (value), length, &start, &stop,
+ &step, &slicelength))
+ return NULL;
+
+ return btpy_list_new (obj->ptid, obj->first + obj->step * start,
+ obj->first + obj->step * stop, obj->step * step,
+ obj->element_type);
+}
+
+/* Helper function that returns the position of an element in a BtraceList
+ or -1 if the element is not in the list. */
+
+static LONGEST
+btpy_list_position (PyObject *self, PyObject *value)
+{
+ const btpy_list_object * const list_obj = (btpy_list_object *) self;
+ const btpy_object * const obj = (btpy_object *) value;
+ Py_ssize_t index = obj->number;
+
+ if (list_obj->element_type != Py_TYPE (value))
+ return -1;
+
+ if (!ptid_equal (list_obj->ptid, obj->ptid))
+ return -1;
+
+ if (index < list_obj->first || index > list_obj->last)
+ return -1;
+
+ index -= list_obj->first;
+
+ if (index % list_obj->step != 0)
+ return -1;
+
+ return index / list_obj->step;
+}
+
+/* Implementation of "in" operator for BtraceLists. */
+
+static int
+btpy_list_contains (PyObject *self, PyObject *value)
+{
+ if (btpy_list_position (self, value) < 0)
+ return 0;
+
+ return 1;
+}
+
+/* Implementation of BtraceLists.index (self, value) -> int. */
+
+static PyObject *
+btpy_list_index (PyObject *self, PyObject *value)
+{
+ const LONGEST index = btpy_list_position (self, value);
+
+ if (index < 0)
+ return PyErr_Format (PyExc_ValueError, _("Not in list."));
+
+ return PyInt_FromSize_t (index);
+}
+
+/* Implementation of BtraceList.count (self, value) -> int. */
+
+static PyObject *
+btpy_list_count (PyObject *self, PyObject *value)
+{
+ const LONGEST index = btpy_list_position (self, value);
+
+ if (index < 0)
+ return PyInt_FromLong (0);
+ else
+ return PyInt_FromLong (1);
+}
+
+/* Python rich compare function to allow for equality and inequality checks
+ in Python. */
+
+static PyObject *
+btpy_list_richcompare (PyObject *self, PyObject *other, int op)
+{
+ const btpy_list_object * const obj1 = (btpy_list_object *) self;
+ const btpy_list_object * const obj2 = (btpy_list_object *) other;
+
+ if (Py_TYPE (self) != Py_TYPE (other))
+ {
+ Py_INCREF (Py_NotImplemented);
+ return Py_NotImplemented;
+ }
+
+ switch (op)
+ {
+ case Py_EQ:
+ if (ptid_equal (obj1->ptid, obj2->ptid)
+ && obj1->element_type == obj2->element_type
+ && obj1->first == obj2->first
+ && obj1->last == obj2->last
+ && obj1->step == obj2->step)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+
+ case Py_NE:
+ if (!ptid_equal (obj1->ptid, obj2->ptid)
+ || obj1->element_type != obj2->element_type
+ || obj1->first != obj2->first
+ || obj1->last != obj2->last
+ || obj1->step != obj2->step)
+ Py_RETURN_TRUE;
+ else
+ Py_RETURN_FALSE;
+
+ default:
+ break;
+ }
+
+ Py_INCREF (Py_NotImplemented);
+ return Py_NotImplemented;
+}
+
+/* Implementation of
+ BtraceRecord.replay_position [BtraceInstruction]. */
+
+static PyObject *
+recpy_bt_replay_position (PyObject* self, void* closure)
+{
+ const struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+
+ if (tinfo == NULL)
+ Py_RETURN_NONE;
+
+ if (tinfo->btrace.replay == NULL)
+ Py_RETURN_NONE;
+
+ return btpy_insn_new (inferior_ptid,
+ btrace_insn_number (tinfo->btrace.replay));
+}
+
+/* Implementation of
+ BtraceRecord.begin [BtraceInstruction]. */
+
+static PyObject *
+recpy_bt_begin (PyObject* self, void* closure)
+{
+ struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+ struct btrace_insn_iterator iterator;
+
+ if (tinfo == NULL)
+ Py_RETURN_NONE;
+
+ btrace_fetch (tinfo);
+
+ if (btrace_is_empty (tinfo))
+ Py_RETURN_NONE;
+
+ btrace_insn_begin (&iterator, &tinfo->btrace);
+ return btpy_insn_new (inferior_ptid, btrace_insn_number (&iterator));
+}
+
+/* Implementation of
+ BtraceRecord.end [BtraceInstruction]. */
+
+static PyObject *
+recpy_bt_end (PyObject* self, void* closure)
+{
+ struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+ struct btrace_insn_iterator iterator;
+
+ if (tinfo == NULL)
+ Py_RETURN_NONE;
+
+ btrace_fetch (tinfo);
+
+ if (btrace_is_empty (tinfo))
+ Py_RETURN_NONE;
+
+ btrace_insn_end (&iterator, &tinfo->btrace);
+ return btpy_insn_new (inferior_ptid, btrace_insn_number (&iterator));
+}
+
+/* Implementation of
+ BtraceRecord.instruction_history [list]. */
+
+static PyObject *
+recpy_bt_instruction_history (PyObject* self, void* closure)
+{
+ struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+ struct btrace_insn_iterator iterator;
+ unsigned long first = 0;
+ unsigned long last = 0;
+
+ if (tinfo == NULL)
+ Py_RETURN_NONE;
+
+ btrace_fetch (tinfo);
+
+ if (btrace_is_empty (tinfo))
+ Py_RETURN_NONE;
+
+ btrace_insn_begin (&iterator, &tinfo->btrace);
+ first = btrace_insn_number (&iterator);
+
+ btrace_insn_end (&iterator, &tinfo->btrace);
+ last = btrace_insn_number (&iterator);
+
+ return btpy_list_new (inferior_ptid, first, last, 1, &btpy_insn_type);
+}
+
+/* Implementation of
+ BtraceRecord.function_call_history [list]. */
+
+static PyObject *
+recpy_bt_function_call_history (PyObject* self, void* closure)
+{
+ struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+ struct btrace_call_iterator iterator;
+ unsigned long first = 0;
+ unsigned long last = 0;
+
+ if (tinfo == NULL)
+ Py_RETURN_NONE;
+
+ btrace_fetch (tinfo);
+
+ if (btrace_is_empty (tinfo))
+ Py_RETURN_NONE;
+
+ btrace_call_begin (&iterator, &tinfo->btrace);
+ first = btrace_call_number (&iterator);
+
+ btrace_call_end (&iterator, &tinfo->btrace);
+ last = btrace_call_number (&iterator);
+
+ return btpy_list_new (inferior_ptid, first, last, 1, &btpy_call_type);
+}
+
+/* Implementation of BtraceRecord.goto (self, BtraceInstruction) -> None. */
+
+static PyObject *
+recpy_bt_goto_position (PyObject* self, PyObject* args)
+{
+ struct thread_info * const tinfo = find_thread_ptid (inferior_ptid);
+ const btpy_object *obj;
+
+ if (tinfo == NULL || btrace_is_empty (tinfo))
+ return PyErr_Format (gdbpy_gdb_error, _("Empty branch trace."));
+
+ if (!PyArg_ParseTuple (args, "O", &obj))
+ return NULL;
+
+ if (Py_TYPE (obj) != &btpy_insn_type)
+ return PyErr_Format (PyExc_TypeError, _("Argument must be instruction."));
+
+ TRY
+ {
+ struct btrace_insn_iterator iter;
+ char buffer[256] = { '\0' };
+
+ btrace_insn_end (&iter, &tinfo->btrace);
+
+ if (btrace_insn_number (&iter) == obj->number)
+ execute_command_to_string ("record goto end", 0);
+ else
+ {
+ snprintf (buffer, sizeof (buffer), "record goto %zi", obj->number);
+ execute_command_to_string (buffer, 0);
+ }
+ }
+ CATCH (except, RETURN_MASK_ALL)
+ {
+ GDB_PY_HANDLE_EXCEPTION (except);
+ }
+ END_CATCH
+
+ Py_RETURN_NONE;
+}
+
+/* See py-btrace.h. */
+
+void
+recpy_btrace_python_interface (struct record_python_interface *iface)
+{
+ iface->begin = recpy_bt_begin;
+ iface->end = recpy_bt_end;
+ iface->function_call_history = recpy_bt_function_call_history;
+ iface->instruction_history = recpy_bt_instruction_history;
+ iface->goto_position = recpy_bt_goto_position;
+ iface->replay_position = recpy_bt_replay_position;
+}
+
+/* BtraceInstruction members. */
+
+struct PyGetSetDef btpy_insn_getset[] = {
+ { "number", btpy_number, NULL, "instruction number", NULL},
+ { "error", btpy_insn_error, NULL, "error number for gaps", NULL},
+ { "symbol", btpy_insn_symbol, NULL, "associated symbol", NULL},
+ { "pc", btpy_insn_pc, NULL, "instruction address", NULL},
+ { "data", btpy_insn_data, NULL, "raw instruction data", NULL},
+ { "decoded", btpy_insn_decode, NULL, "decoded instruction", NULL},
+ { "size", btpy_insn_size, NULL, "instruction size in byte", NULL},
+ { "is_speculative", btpy_insn_is_speculative, NULL, "if the instruction was \
+executed speculatively", NULL},
+ {NULL}
+};
+
+/* BtraceFunctionCall members. */
+
+static PyGetSetDef btpy_call_getset[] = {
+ { "number", btpy_number, NULL, "function call number", NULL},
+ { "level", btpy_call_level, NULL, "call stack level", NULL},
+ { "symbol", btpy_call_symbol, NULL, "associated line and symbol", NULL},
+ { "instructions", btpy_call_instructions, NULL, "list of instructions in \
+this function call", NULL},
+ { "up", btpy_call_up, NULL, "caller or returned-to function segment", NULL},
+ { "prev_sibling", btpy_call_prev_sibling, NULL, "previous segment of this \
+function", NULL},
+ { "next_sibling", btpy_call_next_sibling, NULL, "next segment of this \
+function", NULL},
+ {NULL}
+};
+
+/* BtraceList methods. */
+
+struct PyMethodDef btpy_list_methods[] = {
+ { "count", btpy_list_count, METH_O, "count number of occurences"},
+ { "index", btpy_list_index, METH_O, "index of entry"},
+ {NULL}
+};
+
+/* BtraceList sequence methods. */
+
+static PySequenceMethods btpy_list_sequence_methods = {
+ NULL
+};
+
+/* BtraceList mapping methods. Necessary for slicing. */
+
+static PyMappingMethods btpy_list_mapping_methods = {
+ NULL
+};
+
+/* Sets up the btrace record API. */
+
+int
+gdbpy_initialize_btrace (void)
+{
+ btpy_insn_type.tp_new = PyType_GenericNew;
+ btpy_insn_type.tp_flags = Py_TPFLAGS_DEFAULT;
+ btpy_insn_type.tp_basicsize = sizeof (btpy_object);
+ btpy_insn_type.tp_name = "gdb.BtraceInstruction";
+ btpy_insn_type.tp_doc = "GDB btrace instruction object";
+ btpy_insn_type.tp_getset = btpy_insn_getset;
+ btpy_insn_type.tp_richcompare = btpy_richcompare;
+ btpy_insn_type.tp_hash = btpy_hash;
+
+ btpy_call_type.tp_new = PyType_GenericNew;
+ btpy_call_type.tp_flags = Py_TPFLAGS_DEFAULT;
+ btpy_call_type.tp_basicsize = sizeof (btpy_object);
+ btpy_call_type.tp_name = "gdb.BtraceFunctionCall";
+ btpy_call_type.tp_doc = "GDB btrace call object";
+ btpy_call_type.tp_getset = btpy_call_getset;
+ btpy_call_type.tp_richcompare = btpy_richcompare;
+ btpy_call_type.tp_hash = btpy_hash;
+
+ btpy_list_type.tp_new = PyType_GenericNew;
+ btpy_list_type.tp_flags = Py_TPFLAGS_DEFAULT;
+ btpy_list_type.tp_basicsize = sizeof (btpy_list_object);
+ btpy_list_type.tp_name = "gdb.BtraceInstructionList";
+ btpy_list_type.tp_doc = "GDB instruction list object";
+ btpy_list_type.tp_methods = btpy_list_methods;
+ btpy_list_type.tp_as_sequence = &btpy_list_sequence_methods;
+ btpy_list_type.tp_as_mapping = &btpy_list_mapping_methods;
+ btpy_list_type.tp_richcompare = btpy_list_richcompare;
+
+ btpy_list_sequence_methods.sq_item = btpy_list_item;
+ btpy_list_sequence_methods.sq_length = btpy_list_length;
+ btpy_list_sequence_methods.sq_contains = btpy_list_contains;
+
+ btpy_list_mapping_methods.mp_subscript = btpy_list_slice;
+
+ if (PyType_Ready (&btpy_insn_type) < 0
+ || PyType_Ready (&btpy_call_type) < 0
+ || PyType_Ready (&btpy_list_type) < 0)
+ return -1;
+ else
+ return 0;
+}
diff --git a/gdb/python/py-btrace.h b/gdb/python/py-btrace.h
new file mode 100644
index 0000000..70e30a2
--- /dev/null
+++ b/gdb/python/py-btrace.h
@@ -0,0 +1,32 @@
+/* Python interface to btrace record targets.
+
+ Copyright 2016 Free Software Foundation, Inc.
+
+ Contributed by Intel Corp. <tim.wiederhake@intel.com>
+
+ 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/>. */
+
+#ifndef GDB_PY_BTRACE_H
+#define GDB_PY_BTRACE_H
+
+struct record_python_interface;
+
+/* Fill in the record btrace python interface object and return non-zero.
+ Return zero on failure or if no recording is active. */
+
+extern void recpy_btrace_python_interface (struct record_python_interface *);
+
+#endif /* GDB_PY_BTRACE_H */
diff --git a/gdb/python/python-internal.h b/gdb/python/python-internal.h
index e2bb9a8..8dc8608 100644
--- a/gdb/python/python-internal.h
+++ b/gdb/python/python-internal.h
@@ -432,6 +432,8 @@ int gdbpy_initialize_values (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_frames (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
+int gdbpy_initialize_btrace (void)
+ CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_record (void)
CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_symtabs (void)
diff --git a/gdb/python/python.c b/gdb/python/python.c
index 7f031ae..53cebd0 100644
--- a/gdb/python/python.c
+++ b/gdb/python/python.c
@@ -1787,6 +1787,7 @@ message == an error message without a stack will be printed."),
|| gdbpy_initialize_frames () < 0
|| gdbpy_initialize_commands () < 0
|| gdbpy_initialize_record () < 0
+ || gdbpy_initialize_btrace () < 0
|| gdbpy_initialize_symbols () < 0
|| gdbpy_initialize_symtabs () < 0
|| gdbpy_initialize_blocks () < 0
diff --git a/gdb/record-btrace.c b/gdb/record-btrace.c
index 0576123..129a2ff 100644
--- a/gdb/record-btrace.c
+++ b/gdb/record-btrace.c
@@ -41,6 +41,11 @@
#include "vec.h"
#include <algorithm>

+#if HAVE_PYTHON
+#include "python/py-record.h"
+#include "python/py-btrace.h"
+#endif
+
/* The target_ops of record-btrace. */
static struct target_ops record_btrace_ops;

@@ -2783,6 +2788,38 @@ record_btrace_stop_replaying_all (struct target_ops *self)
record_btrace_stop_replaying (tp);
}

+/* The to_record_python_interface method of target record-btrace. */
+
+static int
+record_btrace_python_interface (struct target_ops *self,
+ struct record_python_interface *iface)
+{
+#if HAVE_PYTHON
+ struct thread_info *tp;
+ const struct btrace_config *conf;
+ int err;
+
+ gdb_assert (iface != NULL);
+
+ tp = find_thread_ptid (inferior_ptid);
+ if (tp == NULL)
+ return 0;
+
+ btrace_fetch (tp);
+
+ conf = btrace_conf (&tp->btrace);
+
+ recpy_btrace_python_interface (iface);
+
+ iface->format = btrace_format_short_string (conf->format);
+ iface->method = "btrace";
+
+ return 1;
+#else
+ return 0;
+#endif
+}
+
/* The to_execution_direction target method. */

static enum exec_direction_kind
@@ -2836,6 +2873,7 @@ init_record_btrace_ops (void)
ops->to_record_is_replaying = record_btrace_is_replaying;
ops->to_record_will_replay = record_btrace_will_replay;
ops->to_record_stop_replaying = record_btrace_stop_replaying_all;
+ ops->to_record_python_interface = record_btrace_python_interface;
ops->to_xfer_partial = record_btrace_xfer_partial;
ops->to_remove_breakpoint = record_btrace_remove_breakpoint;
ops->to_insert_breakpoint = record_btrace_insert_breakpoint;
diff --git a/gdb/record-full.c b/gdb/record-full.c
index 803c5d4..d627774 100644
--- a/gdb/record-full.c
+++ b/gdb/record-full.c
@@ -38,6 +38,10 @@

#include <signal.h>

+#if HAVE_PYTHON
+#include "python/py-record.h"
+#endif
+
/* This module implements "target record-full", also known as "process
record and replay". This target sits on top of a "normal" target
(a target that "has execution"), and provides a record and replay
@@ -1954,6 +1958,21 @@ record_full_stop_replaying (struct target_ops *self)
record_full_goto_end (self);
}

+/* The "to_record_python_interface" target method. */
+
+static int
+record_full_python_interface (struct target_ops *self,
+ struct record_python_interface *iface)
+{
+#if HAVE_PYTHON
+ iface->method = "full";
+ iface->format = "full";
+ return 1;
+#else
+ return 0;
+#endif
+}
+
static void
init_record_full_ops (void)
{
@@ -1997,6 +2016,7 @@ init_record_full_ops (void)
record_full_ops.to_record_is_replaying = record_full_is_replaying;
record_full_ops.to_record_will_replay = record_full_will_replay;
record_full_ops.to_record_stop_replaying = record_full_stop_replaying;
+ record_full_ops.to_record_python_interface = record_full_python_interface;
record_full_ops.to_goto_record_begin = record_full_goto_begin;
record_full_ops.to_goto_record_end = record_full_goto_end;
record_full_ops.to_goto_record = record_full_goto;
--
2.7.4