python: Implement btrace Python bindings for record history.

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

Signed-off-by: Tim Wiederhake <tim.wiederhake@intel.com>

gdb/ChangeLog:

	* Makefile.in (SUBDIR_PYTHON_OBS): Add py-record-btrace.o,
	py-record-full.o.
	(SUBDIR_PYTHON_SRCS): Add py-record-btrace.c, py-record-full.c.
	* python/py-record-btrace.c, python/py-record-btrace.h,
	python/py-record-full.c, python/py-record-full.h: New file.
	* python/py-record.c: Add include for py-record-btrace.h and
	py-record-full.h.
	(recpy_method, recpy_format, recpy_goto, recpy_replay_position,
	recpy_instruction_history, recpy_function_call_history, recpy_begin,
	recpy_end): Use functions from py-record-btrace.c and py-record-full.c.
	* python/python-internal.h (PyInt_FromSsize_t, PyInt_AsSsize_t):
	New definition.
	(gdbpy_initialize_btrace): New export.
	* python/python.c (_initialize_python): Add gdbpy_initialize_btrace.

Change-Id: I8bd893672ffc7e619cc1386767897249e125973a

gdb/python/py-record.c

@@ -21,6 +21,8 @@
 #include "inferior.h"
 #include "record.h"
 #include "python-internal.h"
+#include "py-record-btrace.h"
+#include "py-record-full.h"
 #include "target.h"
 
 /* Python Record object.  */
@@ -57,6 +59,14 @@ recpy_ptid (PyObject *self, void* closure)
 static PyObject *
 recpy_method (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_FULL)
+    return recpy_full_method (self, closure);
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_method (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -65,6 +75,14 @@ recpy_method (PyObject *self, void* closure)
 static PyObject *
 recpy_format (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_FULL)
+    return recpy_full_format (self, closure);
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_format (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -73,6 +91,11 @@ recpy_format (PyObject *self, void* closure)
 static PyObject *
 recpy_goto (PyObject *self, PyObject *value)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_goto (self, value);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -81,6 +104,11 @@ recpy_goto (PyObject *self, PyObject *value)
 static PyObject *
 recpy_replay_position (PyObject *self, void *closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_replay_position (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -89,6 +117,11 @@ recpy_replay_position (PyObject *self, void *closure)
 static PyObject *
 recpy_instruction_history (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_instruction_history (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -97,6 +130,11 @@ recpy_instruction_history (PyObject *self, void* closure)
 static PyObject *
 recpy_function_call_history (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_function_call_history (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -105,6 +143,11 @@ recpy_function_call_history (PyObject *self, void* closure)
 static PyObject *
 recpy_begin (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_begin (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }
 
@@ -113,6 +156,11 @@ recpy_begin (PyObject *self, void* closure)
 static PyObject *
 recpy_end (PyObject *self, void* closure)
 {
+  const recpy_record_object * const obj = (recpy_record_object *) self;
+
+  if (obj->method == RECORD_METHOD_BTRACE)
+    return recpy_bt_end (self, closure);
+
   return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 }