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[deliverable/binutils-gdb.git] / gdb / python / python-internal.h

/* Gdb/Python header for private use by Python module.

   Copyright (C) 2008-2014 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/>.  */

#ifndef GDB_PYTHON_INTERNAL_H
#define GDB_PYTHON_INTERNAL_H

#include "extension.h"

/* These WITH_* macros are defined by the CPython API checker that
   comes with the Python plugin for GCC.  See:
   https://gcc-python-plugin.readthedocs.org/en/latest/cpychecker.html
   The checker defines a WITH_ macro for each attribute it
   exposes.  */

#ifdef WITH_CPYCHECKER_RETURNS_BORROWED_REF_ATTRIBUTE
#define CPYCHECKER_RETURNS_BORROWED_REF			\
  __attribute__ ((cpychecker_returns_borrowed_ref))
#else
#define CPYCHECKER_RETURNS_BORROWED_REF
#endif

#ifdef WITH_CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF_ATTRIBUTE
#define CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF(ARG)		\
  __attribute__ ((cpychecker_type_object_for_typedef (ARG)))
#else
#define CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF(ARG)
#endif

#ifdef WITH_CPYCHECKER_STEALS_REFERENCE_TO_ARG_ATTRIBUTE
#define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n) \
   __attribute__ ((cpychecker_steals_reference_to_arg (n)))
#else
#define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n)
#endif

#ifdef WITH_CPYCHECKER_SETS_EXCEPTION_ATTRIBUTE
#define CPYCHECKER_SETS_EXCEPTION __attribute__ ((cpychecker_sets_exception))
#else
#define CPYCHECKER_SETS_EXCEPTION
#endif

#ifdef WITH_CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION_ATTRIBUTE
#define CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION		\
  __attribute__ ((cpychecker_negative_result_sets_exception))
#else
#define CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION
#endif

#include <stdio.h>

/* Python 2.4 doesn't include stdint.h soon enough to get {u,}intptr_t
   needed by pyport.h.  */
#include <stdint.h>

/* /usr/include/features.h on linux systems will define _POSIX_C_SOURCE
   if it sees _GNU_SOURCE (which config.h will define).
   pyconfig.h defines _POSIX_C_SOURCE to a different value than
   /usr/include/features.h does causing compilation to fail.
   To work around this, undef _POSIX_C_SOURCE before we include Python.h.

   Same problem with _XOPEN_SOURCE.  */
#undef _POSIX_C_SOURCE
#undef _XOPEN_SOURCE

/* On sparc-solaris, /usr/include/sys/feature_tests.h defines
   _FILE_OFFSET_BITS, which pyconfig.h also defines.  Same work
   around technique as above.  */
#undef _FILE_OFFSET_BITS

/* A kludge to avoid redefinition of snprintf on Windows by pyerrors.h.  */
#if defined(_WIN32) && defined(HAVE_DECL_SNPRINTF)
#define HAVE_SNPRINTF 1
#endif

/* Request clean size types from Python.  */
#define PY_SSIZE_T_CLEAN

/* Include the Python header files using angle brackets rather than
   double quotes.  On case-insensitive filesystems, this prevents us
   from including our python/python.h header file.  */
#include <Python.h>
#include <frameobject.h>

#if PY_MAJOR_VERSION >= 3
#define IS_PY3K 1
#endif

#ifdef IS_PY3K
#define Py_TPFLAGS_HAVE_ITER 0
#define Py_TPFLAGS_CHECKTYPES 0

#define PyInt_Check PyLong_Check
#define PyInt_FromLong PyLong_FromLong
#define PyInt_AsLong PyLong_AsLong

#define PyString_FromString PyUnicode_FromString
#define PyString_Decode PyUnicode_Decode
#define PyString_FromFormat PyUnicode_FromFormat
#define PyString_Check PyUnicode_Check
#endif

#if HAVE_LIBPYTHON2_4
/* Py_ssize_t is not defined until 2.5.
   Logical type for Py_ssize_t is Py_intptr_t, but that fails in 64-bit
   compilation due to several apparent mistakes in python2.4 API, so we
   use 'int' instead.  */
typedef int Py_ssize_t;
#endif

#ifndef PyVarObject_HEAD_INIT
/* Python 2.4 does not define PyVarObject_HEAD_INIT.  */
#define PyVarObject_HEAD_INIT(type, size)       \
    PyObject_HEAD_INIT(type) size,

#endif

#ifndef Py_TYPE
/* Python 2.4 does not define Py_TYPE.  */
#define Py_TYPE(ob)             (((PyObject*)(ob))->ob_type)
#endif

/* If Python.h does not define WITH_THREAD, then the various
   GIL-related functions will not be defined.  However,
   PyGILState_STATE will be.  */
#ifndef WITH_THREAD
#define PyGILState_Ensure() ((PyGILState_STATE) 0)
#define PyGILState_Release(ARG) ((void)(ARG))
#define PyEval_InitThreads()
#define PyThreadState_Swap(ARG) ((void)(ARG))
#define PyEval_ReleaseLock()
#endif

/* Python supplies HAVE_LONG_LONG and some `long long' support when it
   is available.  These defines let us handle the differences more
   cleanly.  */
#ifdef HAVE_LONG_LONG

#define GDB_PY_LL_ARG "L"
#define GDB_PY_LLU_ARG "K"
typedef PY_LONG_LONG gdb_py_longest;
typedef unsigned PY_LONG_LONG gdb_py_ulongest;
#define gdb_py_long_from_longest PyLong_FromLongLong
#define gdb_py_long_from_ulongest PyLong_FromUnsignedLongLong
#define gdb_py_long_as_ulongest PyLong_AsUnsignedLongLong

#else /* HAVE_LONG_LONG */

#define GDB_PY_LL_ARG "L"
#define GDB_PY_LLU_ARG "K"
typedef long gdb_py_longest;
typedef unsigned long gdb_py_ulongest;
#define gdb_py_long_from_longest PyLong_FromLong
#define gdb_py_long_from_ulongest PyLong_FromUnsignedLong
#define gdb_py_long_as_ulongest PyLong_AsUnsignedLong

#endif /* HAVE_LONG_LONG */

/* Python 2.6 did not wrap Py_DECREF in 'do {...} while (0)', leading
   to 'suggest explicit braces to avoid ambiguous ‘else’' gcc errors.
   Wrap it ourselves, so that callers don't need to care.  */

static inline void
gdb_Py_DECREF (void *op) /* ARI: editCase function */
{
  /* ... and Python 2.4 didn't cast OP to PyObject pointer on the
     '(op)->ob_refcnt' references within the macro.  Cast it ourselves
     too.  */
  Py_DECREF ((PyObject *) op);
}

#undef Py_DECREF
#define Py_DECREF(op) gdb_Py_DECREF (op)

/* In order to be able to parse symtab_and_line_to_sal_object function
   a real symtab_and_line structure is needed.  */
#include "symtab.h"

/* Also needed to parse enum var_types. */
#include "command.h"
#include "breakpoint.h"

#include "exceptions.h"

enum gdbpy_iter_kind { iter_keys, iter_values, iter_items };

struct block;
struct value;
struct language_defn;
struct program_space;
struct bpstats;
struct inferior;

extern int gdb_python_initialized;

extern PyObject *gdb_module;
extern PyObject *gdb_python_module;
extern PyTypeObject value_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("value_object");
extern PyTypeObject block_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF("block_object");
extern PyTypeObject symbol_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("symbol_object");
extern PyTypeObject event_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
extern PyTypeObject stop_event_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
extern PyTypeObject breakpoint_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("breakpoint_object");
extern PyTypeObject frame_object_type
    CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("frame_object");

typedef struct gdbpy_breakpoint_object
{
  PyObject_HEAD

  /* The breakpoint number according to gdb.  */
  int number;

  /* The gdb breakpoint object, or NULL if the breakpoint has been
     deleted.  */
  struct breakpoint *bp;

  /* 1 is this is a FinishBreakpoint object, 0 otherwise.  */
  int is_finish_bp;
} gdbpy_breakpoint_object;

/* Require that BREAKPOINT be a valid breakpoint ID; throw a Python
   exception if it is invalid.  */
#define BPPY_REQUIRE_VALID(Breakpoint)                                  \
    do {                                                                \
      if ((Breakpoint)->bp == NULL)                                     \
        return PyErr_Format (PyExc_RuntimeError,                        \
                             _("Breakpoint %d is invalid."),            \
                             (Breakpoint)->number);                     \
    } while (0)

/* Require that BREAKPOINT be a valid breakpoint ID; throw a Python
   exception if it is invalid.  This macro is for use in setter functions.  */
#define BPPY_SET_REQUIRE_VALID(Breakpoint)                              \
    do {                                                                \
      if ((Breakpoint)->bp == NULL)                                     \
        {                                                               \
          PyErr_Format (PyExc_RuntimeError, _("Breakpoint %d is invalid."), \
                        (Breakpoint)->number);                          \
          return -1;                                                    \
        }                                                               \
    } while (0)


/* Variables used to pass information between the Breakpoint
   constructor and the breakpoint-created hook function.  */
extern gdbpy_breakpoint_object *bppy_pending_object;


typedef struct
{
  PyObject_HEAD

  /* The thread we represent.  */
  struct thread_info *thread;

  /* The Inferior object to which this thread belongs.  */
  PyObject *inf_obj;
} thread_object;

extern struct cmd_list_element *set_python_list;
extern struct cmd_list_element *show_python_list;
\f
/* extension_language_script_ops "methods".  */

extern int gdbpy_auto_load_enabled (const struct extension_language_defn *);

/* extension_language_ops "methods".  */

extern enum ext_lang_rc gdbpy_apply_val_pretty_printer
  (const struct extension_language_defn *,
   struct type *type, const gdb_byte *valaddr,
   int embedded_offset, CORE_ADDR address,
   struct ui_file *stream, int recurse,
   const struct value *val,
   const struct value_print_options *options,
   const struct language_defn *language);
extern enum ext_lang_bt_status gdbpy_apply_frame_filter
  (const struct extension_language_defn *,
   struct frame_info *frame, int flags, enum ext_lang_frame_args args_type,
   struct ui_out *out, int frame_low, int frame_high);
extern void gdbpy_preserve_values (const struct extension_language_defn *,
				   struct objfile *objfile,
				   htab_t copied_types);
extern enum ext_lang_bp_stop gdbpy_breakpoint_cond_says_stop
  (const struct extension_language_defn *, struct breakpoint *);
extern int gdbpy_breakpoint_has_cond (const struct extension_language_defn *,
				      struct breakpoint *b);
\f
PyObject *gdbpy_history (PyObject *self, PyObject *args);
PyObject *gdbpy_breakpoints (PyObject *, PyObject *);
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_newest_frame (PyObject *self, PyObject *args);
PyObject *gdbpy_selected_frame (PyObject *self, PyObject *args);
PyObject *gdbpy_block_for_pc (PyObject *self, PyObject *args);
PyObject *gdbpy_lookup_type (PyObject *self, PyObject *args, PyObject *kw);
int gdbpy_is_field (PyObject *obj);
PyObject *gdbpy_create_lazy_string_object (CORE_ADDR address, long length,
					   const char *encoding,
					   struct type *type);
PyObject *gdbpy_inferiors (PyObject *unused, PyObject *unused2);
PyObject *gdbpy_selected_thread (PyObject *self, PyObject *args);
PyObject *gdbpy_selected_inferior (PyObject *self, PyObject *args);
PyObject *gdbpy_string_to_argv (PyObject *self, PyObject *args);
PyObject *gdbpy_parameter (PyObject *self, PyObject *args);
PyObject *gdbpy_parameter_value (enum var_types type, void *var);
char *gdbpy_parse_command_name (const char *name,
				struct cmd_list_element ***base_list,
				struct cmd_list_element **start_list);

PyObject *symtab_and_line_to_sal_object (struct symtab_and_line sal);
PyObject *symtab_to_symtab_object (struct symtab *symtab);
PyObject *symbol_to_symbol_object (struct symbol *sym);
PyObject *block_to_block_object (const struct block *block,
				 struct objfile *objfile);
PyObject *value_to_value_object (struct value *v);
PyObject *type_to_type_object (struct type *);
PyObject *frame_info_to_frame_object (struct frame_info *frame);
PyObject *symtab_to_linetable_object (PyObject *symtab);
PyObject *pspace_to_pspace_object (struct program_space *)
    CPYCHECKER_RETURNS_BORROWED_REF;
PyObject *pspy_get_printers (PyObject *, void *);
PyObject *pspy_get_frame_filters (PyObject *, void *);

PyObject *objfile_to_objfile_object (struct objfile *)
    CPYCHECKER_RETURNS_BORROWED_REF;
PyObject *objfpy_get_printers (PyObject *, void *);
PyObject *objfpy_get_frame_filters (PyObject *, void *);

PyObject *gdbarch_to_arch_object (struct gdbarch *gdbarch);

thread_object *create_thread_object (struct thread_info *tp);
thread_object *find_thread_object (ptid_t ptid)
    CPYCHECKER_RETURNS_BORROWED_REF;
PyObject *find_inferior_object (int pid);
PyObject *inferior_to_inferior_object (struct inferior *inferior);

const struct block *block_object_to_block (PyObject *obj);
struct symbol *symbol_object_to_symbol (PyObject *obj);
struct value *value_object_to_value (PyObject *self);
struct value *convert_value_from_python (PyObject *obj);
struct type *type_object_to_type (PyObject *obj);
struct symtab *symtab_object_to_symtab (PyObject *obj);
struct symtab_and_line *sal_object_to_symtab_and_line (PyObject *obj);
struct frame_info *frame_object_to_frame_info (PyObject *frame_obj);
struct gdbarch *arch_object_to_gdbarch (PyObject *obj);

void gdbpy_initialize_gdb_readline (void);
int gdbpy_initialize_auto_load (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_values (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_frames (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_symtabs (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_commands (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_symbols (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_symtabs (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_blocks (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_types (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_functions (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_pspace (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_objfile (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_breakpoints (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_finishbreakpoints (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_lazy_string (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_linetable (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_parameters (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_thread (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_inferior (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_eventregistry (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_py_events (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_stop_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_signal_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_breakpoint_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_continue_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_exited_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_thread_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_new_objfile_event (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;
int gdbpy_initialize_arch (void)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;

struct cleanup *make_cleanup_py_decref (PyObject *py);
struct cleanup *make_cleanup_py_xdecref (PyObject *py);

struct cleanup *ensure_python_env (struct gdbarch *gdbarch,
				   const struct language_defn *language);

extern struct gdbarch *python_gdbarch;
extern const struct language_defn *python_language;

/* Use this after a TRY_EXCEPT to throw the appropriate Python
   exception.  */
#define GDB_PY_HANDLE_EXCEPTION(Exception)	\
  do {						\
    if (Exception.reason < 0)			\
      {						\
	gdbpy_convert_exception (Exception);	\
        return NULL;				\
      }						\
  } while (0)

/* Use this after a TRY_EXCEPT to throw the appropriate Python
   exception.  This macro is for use inside setter functions.  */
#define GDB_PY_SET_HANDLE_EXCEPTION(Exception)				\
    do {								\
      if (Exception.reason < 0)						\
        {								\
	  gdbpy_convert_exception (Exception);				\
	  return -1;							\
	}								\
    } while (0)

void gdbpy_print_stack (void);

PyObject *python_string_to_unicode (PyObject *obj);
char *unicode_to_target_string (PyObject *unicode_str);
char *python_string_to_target_string (PyObject *obj);
PyObject *python_string_to_target_python_string (PyObject *obj);
char *python_string_to_host_string (PyObject *obj);
int gdbpy_is_string (PyObject *obj);
char *gdbpy_obj_to_string (PyObject *obj);
char *gdbpy_exception_to_string (PyObject *ptype, PyObject *pvalue);

int gdbpy_is_lazy_string (PyObject *result);
void gdbpy_extract_lazy_string (PyObject *string, CORE_ADDR *addr,
				struct type **str_type,
				long *length, char **encoding);

int gdbpy_is_value_object (PyObject *obj);

/* Note that these are declared here, and not in python.h with the
   other pretty-printer functions, because they refer to PyObject.  */
PyObject *apply_varobj_pretty_printer (PyObject *print_obj,
				       struct value **replacement,
				       struct ui_file *stream);
PyObject *gdbpy_get_varobj_pretty_printer (struct value *value);
char *gdbpy_get_display_hint (PyObject *printer);
PyObject *gdbpy_default_visualizer (PyObject *self, PyObject *args);

void bpfinishpy_pre_stop_hook (struct gdbpy_breakpoint_object *bp_obj);
void bpfinishpy_post_stop_hook (struct gdbpy_breakpoint_object *bp_obj);

extern PyObject *gdbpy_doc_cst;
extern PyObject *gdbpy_children_cst;
extern PyObject *gdbpy_to_string_cst;
extern PyObject *gdbpy_display_hint_cst;
extern PyObject *gdbpy_enabled_cst;
extern PyObject *gdbpy_value_cst;

/* Exception types.  */
extern PyObject *gdbpy_gdb_error;
extern PyObject *gdbpy_gdb_memory_error;
extern PyObject *gdbpy_gdberror_exc;

extern void gdbpy_convert_exception (struct gdb_exception)
    CPYCHECKER_SETS_EXCEPTION;

int get_addr_from_python (PyObject *obj, CORE_ADDR *addr)
    CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;

PyObject *gdb_py_object_from_longest (LONGEST l);
PyObject *gdb_py_object_from_ulongest (ULONGEST l);
int gdb_py_int_as_long (PyObject *, long *);

PyObject *gdb_py_generic_dict (PyObject *self, void *closure);

int gdb_pymodule_addobject (PyObject *module, const char *name,
			    PyObject *object)
  CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION;

#endif /* GDB_PYTHON_INTERNAL_H */