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Re: [PATCH v3 5/8] python: Create Python bindings for record history.


Tim Wiederhake writes:
 > This patch adds three new functions to the gdb module in Python:
 > 	- start_recording
 > 	- stop_recording
 > 	- current_recording
 > start_recording and current_recording return an object of the new type
 > gdb.Record, which can be used to access the recorded data.
 >
 > 2016-11-21  Tim Wiederhake  <tim.wiederhake@intel.com>
 >
 > gdb/ChangeLog
 >
 > 	* Makefile.in (SUBDIR_PYTHON_OBS): Add python/py-record.o.
 > 	(SUBDIR_PYTHON_SRCS): Add python/py-record.c.
 > 	* python/py-record.c: New file.
 > 	* python/py-record.h: New file.
 > 	* python/python-internal.h (gdbpy_start_recording,
 > 	gdbpy_current_recording, gdpy_stop_recording,
 > 	gdbpy_initialize_record): New export.
 > 	* python/python.c (_initialize_python): Add gdbpy_initialize_record.
 > 	(python_GdbMethods): Add gdbpy_start_recording,
 > 	gdbpy_current_recording and gdbpy_stop_recording.
 > 	* target-debug.h (target_debug_print_struct_record_python_interface):
 > 	New define.
 > 	* target-delegates.c: Regenerate.
 > 	* target.c (target_record_python_interface): New function.
 > 	* target.h: Added struct record_python_interface forward declaration.
 > 	Export target_record_python_interface.
 > 	(struct target_ops): Add to_record_python_interface function.
 >
 >
 > ---
 >  gdb/Makefile.in              |   2 +
> gdb/python/py-record.c | 257 +++++++++++++++++++++++++++++++++++++++++++
 >  gdb/python/py-record.h       |  57 ++++++++++
 >  gdb/python/python-internal.h |   5 +
 >  gdb/python/python.c          |  13 +++
 >  gdb/target-debug.h           |   2 +
 >  gdb/target-delegates.c       |  33 ++++++
 >  gdb/target.c                 |   7 ++
 >  gdb/target.h                 |  10 ++
 >  9 files changed, 386 insertions(+)
 >  create mode 100644 gdb/python/py-record.c
 >  create mode 100644 gdb/python/py-record.h
 >
 > diff --git a/gdb/Makefile.in b/gdb/Makefile.in
 > index b68cf58..3340b5e 100644
 > --- a/gdb/Makefile.in
 > +++ b/gdb/Makefile.in
 > @@ -403,6 +403,7 @@ SUBDIR_PYTHON_OBS = \
 >  	py-param.o \
 >  	py-prettyprint.o \
 >  	py-progspace.o \
 > +	py-record.o \
 >  	py-signalevent.o \
 >  	py-stopevent.o \
 >  	py-symbol.o \
 > @@ -443,6 +444,7 @@ SUBDIR_PYTHON_SRCS = \
 >  	python/py-param.c \
 >  	python/py-prettyprint.c \
 >  	python/py-progspace.c \
 > +	python/py-record.c \
 >  	python/py-signalevent.c \
 >  	python/py-stopevent.c \
 >  	python/py-symbol.c \
 > diff --git a/gdb/python/py-record.c b/gdb/python/py-record.c
 > new file mode 100644
 > index 0000000..e25f6ca
 > --- /dev/null
 > +++ b/gdb/python/py-record.c
 > @@ -0,0 +1,257 @@
 > +/* Python interface to 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/>. */
 > +
 > +#include "defs.h"
 > +#include "gdbcmd.h"
 > +#include "record.h"
 > +#include "record-btrace.h"
 > +#include "record-full.h"
 > +#include "py-record.h"
 > +#include "target.h"
 > +
 > +/* Python Record object.  */
 > +
 > +typedef struct
 > +{
 > +  PyObject_HEAD
 > +
 > +  struct record_python_interface interface;
 > +} recpy_record_object;
 > +
 > +/* Python Record type.  */
 > +
 > +static PyTypeObject recpy_record_type = {
 > +  PyVarObject_HEAD_INIT (NULL, 0)
 > +};
 > +
 > +/* Implementation of record.method.  */
 > +
 > +static PyObject *
 > +recpy_method (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.method == NULL)
 > +    return PyString_FromString (_("unknown"));
 > +
 > +  return PyString_FromString (obj->interface.method);
 > +}
 > +
 > +/* Implementation of record.format.  */
 > +
 > +static PyObject *
 > +recpy_format (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.format == NULL)
 > +    return PyString_FromString (_("unknown"));
 > +
 > +  return PyString_FromString (obj->interface.format);
 > +}
 > +
 > +/* Implementation of record.goto (instruction) -> None.  */
 > +
 > +static PyObject *
 > +recpy_goto (PyObject *self, PyObject *value)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.goto_position == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.goto_position (self, value);
 > +}
 > +
 > +/* Implementation of record.replay_position [instruction]  */
 > +
 > +static PyObject *
 > +recpy_replay_position (PyObject *self, void *closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.replay_position == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.replay_position (self, closure);
 > +}
 > +
 > +/* Implementation of record.instruction_history [list].  */
 > +
 > +static PyObject *
 > +recpy_instruction_history (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.instruction_history == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.instruction_history (self, closure);
 > +}
 > +
 > +/* Implementation of record.function_call_history [list].  */
 > +
 > +static PyObject *
 > +recpy_function_call_history (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.function_call_history == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.function_call_history (self, closure);
 > +}
 > +
 > +/* Implementation of record.begin [instruction].  */
 > +
 > +static PyObject *
 > +recpy_begin (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.begin == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.begin (self, closure);
 > +}
 > +
 > +/* Implementation of record.end [instruction].  */
 > +
 > +static PyObject *
 > +recpy_end (PyObject *self, void* closure)
 > +{
 > +  recpy_record_object *obj = (recpy_record_object *) self;
 > +
 > +  if (obj->interface.end == NULL)
> + return PyErr_Format (PyExc_NotImplementedError, _("Not implemented."));
 > +
 > +  return obj->interface.end (self, closure);
 > +}
 > +
 > +/* Record method list.  */
 > +
 > +static PyMethodDef recpy_record_methods[] = {
 > +  { "goto", recpy_goto, METH_VARARGS,
 > +    "goto (instruction|function_call) -> None.\n\
 > +Rewind to given location."},
 > +  { NULL }
 > +};
 > +
 > +/* Record member list.  */
 > +
 > +static PyGetSetDef recpy_record_getset[] = {
 > +  { "method", recpy_method, NULL, "Current recording method.", NULL },
 > +  { "format", recpy_format, NULL, "Current recording format.", NULL },
> + { "replay_position", recpy_replay_position, NULL, "Current replay position.",
 > +    NULL },
 > +  { "instruction_history", recpy_instruction_history, NULL,
 > +    "List of instructions in current recording.", NULL },
 > +  { "function_call_history", recpy_function_call_history, NULL,
 > +    "List of function calls in current recording.", NULL },
 > +  { "begin", recpy_begin, NULL,
 > +    "First instruction in current recording.", NULL },
 > +  { "end", recpy_end, NULL,
> + "One past the last instruction in current recording. This is typically \ > +the current instruction and is used for e.g. record.goto (record.end).", NULL },
 > +  { NULL }
 > +};
 > +
 > +/* Sets up the record API in the gdb module.  */
 > +
 > +int
 > +gdbpy_initialize_record (void)
 > +{
 > +  recpy_record_type.tp_new = PyType_GenericNew;
 > +  recpy_record_type.tp_flags = Py_TPFLAGS_DEFAULT;
 > +  recpy_record_type.tp_basicsize = sizeof (recpy_record_object);
 > +  recpy_record_type.tp_name = "gdb.Record";
 > +  recpy_record_type.tp_doc = "GDB record object";
 > +  recpy_record_type.tp_methods = recpy_record_methods;
 > +  recpy_record_type.tp_getset = recpy_record_getset;
 > +
 > +  return PyType_Ready (&recpy_record_type);
 > +}
 > +
 > +/* Implementation of gdb.start_recording (method) -> gdb.Record.  */
 > +
 > +PyObject *
 > +gdbpy_start_recording (PyObject *self, PyObject *args)
 > +{
 > +  const char *method = NULL;
 > +  const char *format = NULL;
 > +
 > +  if (!PyArg_ParseTuple (args, "|ss", &method, &format))
 > +    return NULL;
 > +
 > +  TRY
 > +    {
 > +      record_start (method, format, 0);

I suppose we're leaving it to gdb to deal with issues like
"what happens if I start a recording on one inferior,
switch inferiors, and start another recording?"
Library APIs based on global state suck, but that's not your fault.

Still, I wonder if the user can get into any kind of
trouble doing such things.

 > +      return gdbpy_current_recording (self, args);
 > +    }
 > +  CATCH (except, RETURN_MASK_ALL)
 > +    {
 > +      gdbpy_convert_exception (except);
 > +    }
 > +  END_CATCH
 > +
 > +  return NULL;
 > +}
 > +
 > +/* Implementation of gdb.current_recording (self) -> gdb.Record.  */
 > +
 > +PyObject *
 > +gdbpy_current_recording (PyObject *self, PyObject *args)
 > +{
 > +  recpy_record_object* obj;
 > +
 > +  obj = PyObject_New (recpy_record_object, &recpy_record_type);
 > +  if (obj == NULL)
 > +    return NULL;
 > +
 > +  memset (&obj->interface, 0, sizeof (struct record_python_interface));
 > +
 > +  if (!target_record_python_interface (&obj->interface))
 > +    {
 > +      Py_DecRef ((PyObject *) obj);
 > +      Py_RETURN_NONE;
 > +    }
 > +
 > +  return (PyObject *) obj;
 > +}
 > +
 > +/* Implementation of gdb.stop_recording (self) -> None.  */
 > +
 > +PyObject *
 > +gdbpy_stop_recording (PyObject *self, PyObject *args)
 > +{
 > +  TRY
 > +    {
 > +      execute_command_to_string ("record stop", 0);
 > +      Py_RETURN_NONE;
 > +    }
 > +  CATCH (except, RETURN_MASK_ALL)
 > +    {
 > +      gdbpy_convert_exception (except);
 > +    }
 > +  END_CATCH
 > +
 > +  return NULL;
 > +}
 > diff --git a/gdb/python/py-record.h b/gdb/python/py-record.h
 > new file mode 100644
 > index 0000000..fb56182
 > --- /dev/null
 > +++ b/gdb/python/py-record.h
 > @@ -0,0 +1,57 @@
 > +/* Python interface to 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_RECORD_H
 > +#define GDB_PY_RECORD_H
 > +
 > +#include "python-internal.h"
 > +
> +/* Record interface for Python bindings. Any field may be NULL if unknown
 > +   or not supported.  */
 > +
 > +struct record_python_interface
 > +{
 > +  /* Recording method, e.g. "full" or "btrace".  */
 > +  const char *method;
 > +
 > +  /* Recording format, e.g. "bts" or "pt".  */
 > +  const char *format;
 > +
 > +  /* Implementation of gdb.Record.goto (instruction) -> None.  */
 > +  binaryfunc goto_position;
 > +
 > +  /* Implementation of gdb.Record.replay_position [instruction]  */
 > +  getter replay_position;
 > +
 > +  /* Implementation of gdb.Record.instruction_history [list].  */
 > +  getter instruction_history;
 > +
 > +  /* Implementation of gdb.Record.function_call_history [list].  */
 > +  getter function_call_history;
 > +
 > +  /* Implementation of gdb.Record.begin [instruction].  */
 > +  getter begin;
 > +
 > +  /* Implementation of gdb.Record.end [instruction].  */
 > +  getter end;
 > +};
 > +
 > +#endif /* GDB_PY_RECORD_H */
 > diff --git a/gdb/python/python-internal.h b/gdb/python/python-internal.h
 > index 5f0abf8..e2bb9a8 100644
 > --- a/gdb/python/python-internal.h
 > +++ b/gdb/python/python-internal.h
> @@ -362,6 +362,9 @@ PyObject *gdbpy_frame_stop_reason_string (PyObject *, PyObject *); > PyObject *gdbpy_lookup_symbol (PyObject *self, PyObject *args, PyObject *kw);
 >  PyObject *gdbpy_lookup_global_symbol (PyObject *self, PyObject *args,
 >  				      PyObject *kw);
 > +PyObject *gdbpy_start_recording (PyObject *self, PyObject *args);
 > +PyObject *gdbpy_current_recording (PyObject *self, PyObject *args);
 > +PyObject *gdbpy_stop_recording (PyObject *self, PyObject *args);
 >  PyObject *gdbpy_newest_frame (PyObject *self, PyObject *args);
 >  PyObject *gdbpy_selected_frame (PyObject *self, PyObject *args);
 >  PyObject *gdbpy_block_for_pc (PyObject *self, PyObject *args);
 > @@ -429,6 +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_record (void)
 > +  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
 >  int gdbpy_initialize_symtabs (void)
 >    CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
 >  int gdbpy_initialize_commands (void)
 > diff --git a/gdb/python/python.c b/gdb/python/python.c
 > index 321479b..7f031ae 100644
 > --- a/gdb/python/python.c
 > +++ b/gdb/python/python.c
> @@ -1786,6 +1786,7 @@ message == an error message without a stack will be printed."),
 >        || gdbpy_initialize_values () < 0
 >        || gdbpy_initialize_frames () < 0
 >        || gdbpy_initialize_commands () < 0
 > +      || gdbpy_initialize_record () < 0
 >        || gdbpy_initialize_symbols () < 0
 >        || gdbpy_initialize_symtabs () < 0
 >        || gdbpy_initialize_blocks () < 0
 > @@ -1998,6 +1999,18 @@ Return the selected frame object." },
 >      "stop_reason_string (Integer) -> String.\n\
 >  Return a string explaining unwind stop reason." },
 >
 > +  { "start_recording", gdbpy_start_recording, METH_VARARGS,
 > +    "start_recording ([method] [, format]) -> gdb.Record.\n\
> +Start recording with the given method. If no method is given, will fall back\n\ > +to the system default method. If no format is given, will fall back to the\n\
 > +default format for the given method."},
 > +  { "current_recording", gdbpy_current_recording, METH_NOARGS,
 > +    "current_recording () -> gdb.Record.\n\
 > +Return current recording object." },
 > +  { "stop_recording", gdbpy_stop_recording, METH_NOARGS,
 > +    "stop_recording () -> None.\n\
 > +Stop current recording." },
 > +
 >    { "lookup_type", (PyCFunction) gdbpy_lookup_type,
 >      METH_VARARGS | METH_KEYWORDS,
 >      "lookup_type (name [, block]) -> type\n\
 > diff --git a/gdb/target-debug.h b/gdb/target-debug.h
 > index ef7e14d..8790016 100644
 > --- a/gdb/target-debug.h
 > +++ b/gdb/target-debug.h
 > @@ -160,6 +160,8 @@
 >    target_debug_do_print (host_address_to_string (X))
 >  #define target_debug_print_enum_remove_bp_reason(X) \
 >    target_debug_do_print (plongest (X))
 > +#define target_debug_print_struct_record_python_interface_p(X) \
 > +  target_debug_do_print (host_address_to_string (X))
 >
 >  static void
> target_debug_print_struct_target_waitstatus_p (struct target_waitstatus *status)
 > diff --git a/gdb/target-delegates.c b/gdb/target-delegates.c
 > index 73e45dd..66e137b 100644
 > --- a/gdb/target-delegates.c
 > +++ b/gdb/target-delegates.c
> @@ -3995,6 +3995,35 @@ debug_call_history_range (struct target_ops *self, ULONGEST arg1, ULONGEST arg2,
 >  }
 >
 >  static int
> +delegate_record_python_interface (struct target_ops *self, struct record_python_interface *arg1)
 > +{
 > +  self = self->beneath;
 > +  return self->to_record_python_interface (self, arg1);
 > +}

Access to gdb's extension languages must go through
the extension language interface.
[Any time you see the word "python" (or "scheme") in a core gdb
object think "bug!"]

See extension.[ch], extension-priv.h.

 > +
 > +static int
> +tdefault_record_python_interface (struct target_ops *self, struct record_python_interface *arg1)
 > +{
 > +  return 0;
 > +}
 > +
 > +static int
> +debug_record_python_interface (struct target_ops *self, struct record_python_interface *arg1)
 > +{
 > +  int result;
> + fprintf_unfiltered (gdb_stdlog, "-> %s->to_record_python_interface (...)\n", debug_target.to_shortname); > + result = debug_target.to_record_python_interface (&debug_target, arg1); > + fprintf_unfiltered (gdb_stdlog, "<- %s->to_record_python_interface (", debug_target.to_shortname);
 > +  target_debug_print_struct_target_ops_p (&debug_target);
 > +  fputs_unfiltered (", ", gdb_stdlog);
 > +  target_debug_print_struct_record_python_interface_p (arg1);
 > +  fputs_unfiltered (") = ", gdb_stdlog);
 > +  target_debug_print_int (result);
 > +  fputs_unfiltered ("\n", gdb_stdlog);
 > +  return result;
 > +}
 > +
 > +static int
 >  delegate_augmented_libraries_svr4_read (struct target_ops *self)
 >  {
 >    self = self->beneath;
 > @@ -4418,6 +4447,8 @@ install_delegators (struct target_ops *ops)
 >      ops->to_call_history_from = delegate_call_history_from;
 >    if (ops->to_call_history_range == NULL)
 >      ops->to_call_history_range = delegate_call_history_range;
 > +  if (ops->to_record_python_interface == NULL)
 > +    ops->to_record_python_interface = delegate_record_python_interface;
 >    if (ops->to_augmented_libraries_svr4_read == NULL)
> ops->to_augmented_libraries_svr4_read = delegate_augmented_libraries_svr4_read;
 >    if (ops->to_get_unwinder == NULL)
 > @@ -4581,6 +4612,7 @@ install_dummy_methods (struct target_ops *ops)
 >    ops->to_call_history = tdefault_call_history;
 >    ops->to_call_history_from = tdefault_call_history_from;
 >    ops->to_call_history_range = tdefault_call_history_range;
 > +  ops->to_record_python_interface = tdefault_record_python_interface;
> ops->to_augmented_libraries_svr4_read = tdefault_augmented_libraries_svr4_read;
 >    ops->to_get_unwinder = tdefault_get_unwinder;
 >    ops->to_get_tailcall_unwinder = tdefault_get_tailcall_unwinder;
 > @@ -4739,6 +4771,7 @@ init_debug_target (struct target_ops *ops)
 >    ops->to_call_history = debug_call_history;
 >    ops->to_call_history_from = debug_call_history_from;
 >    ops->to_call_history_range = debug_call_history_range;
 > +  ops->to_record_python_interface = debug_record_python_interface;
> ops->to_augmented_libraries_svr4_read = debug_augmented_libraries_svr4_read;
 >    ops->to_get_unwinder = debug_get_unwinder;
 >    ops->to_get_tailcall_unwinder = debug_get_tailcall_unwinder;
 > diff --git a/gdb/target.c b/gdb/target.c
 > index 246d292..416a6ab 100644
 > --- a/gdb/target.c
 > +++ b/gdb/target.c
 > @@ -3812,6 +3812,13 @@ target_record_stop_replaying (void)
 >  }
 >
 >  /* See target.h.  */
 > +int
 > +target_record_python_interface (struct record_python_interface *iface)
 > +{
> + return current_target.to_record_python_interface (&current_target, iface);
 > +}
 > +
 > +/* See target.h.  */
 >
 >  void
 >  target_goto_record_begin (void)
 > diff --git a/gdb/target.h b/gdb/target.h
 > index a54b3db..70f10fb 100644
 > --- a/gdb/target.h
 > +++ b/gdb/target.h
 > @@ -39,6 +39,7 @@ struct traceframe_info;
 >  struct expression;
 >  struct dcache_struct;
 >  struct inferior;
 > +struct record_python_interface;
 >
 >  #include "infrun.h" /* For enum exec_direction_kind.  */
 >  #include "breakpoint.h" /* For enum bptype.  */
 > @@ -1232,6 +1233,12 @@ struct target_ops
 >  				   ULONGEST begin, ULONGEST end, int flags)
 >        TARGET_DEFAULT_NORETURN (tcomplain ());
 >
 > +    /* Fill in the record python interface object and return non-zero.
 > +       Return zero on failure or if no recording is active.  */
 > +    int (*to_record_python_interface) (struct target_ops *,
 > +				       struct record_python_interface *)
 > +       TARGET_DEFAULT_RETURN (0);
 > +
 >      /* Nonzero if TARGET_OBJECT_LIBRARIES_SVR4 may be read with a
 >         non-empty annex.  */
 >      int (*to_augmented_libraries_svr4_read) (struct target_ops *)
> @@ -2528,6 +2535,9 @@ extern void target_call_history_from (ULONGEST begin, int size, int flags);
 >  /* See to_call_history_range.  */
> extern void target_call_history_range (ULONGEST begin, ULONGEST end, int flags);
 >
 > +/* See to_record_python_interface.  */
> +extern int target_record_python_interface (struct record_python_interface *);
 > +
 >  /* See to_prepare_to_generate_core.  */
 >  extern void target_prepare_to_generate_core (void);
 >
 > --
 > 2.7.4
 >

--
/dje


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