gdb/python/python-internal.h

   1 /* Gdb/Python header for private use by Python module.
   2
   3    Copyright (C) 2008-2013 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef GDB_PYTHON_INTERNAL_H
  21 #define GDB_PYTHON_INTERNAL_H
  22
  23 /* These WITH_* macros are defined by the CPython API checker that
  24    comes with the Python plugin for GCC.  See:
  25    https://gcc-python-plugin.readthedocs.org/en/latest/cpychecker.html
  26    The checker defines a WITH_ macro for each attribute it
  27    exposes.  */
  28
  29 #ifdef WITH_CPYCHECKER_RETURNS_BORROWED_REF_ATTRIBUTE
  30 #define CPYCHECKER_RETURNS_BORROWED_REF                 \
  31   __attribute__ ((cpychecker_returns_borrowed_ref))
  32 #else
  33 #define CPYCHECKER_RETURNS_BORROWED_REF
  34 #endif
  35
  36 #ifdef WITH_CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF_ATTRIBUTE
  37 #define CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF(ARG)         \
  38   __attribute__ ((cpychecker_type_object_for_typedef (ARG)))
  39 #else
  40 #define CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF(ARG)
  41 #endif
  42
  43 #ifdef WITH_CPYCHECKER_STEALS_REFERENCE_TO_ARG_ATTRIBUTE
  44 #define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n) \
  45    __attribute__ ((cpychecker_steals_reference_to_arg (n)))
  46 #else
  47 #define CPYCHECKER_STEALS_REFERENCE_TO_ARG(n)
  48 #endif
  49
  50 #ifdef WITH_CPYCHECKER_SETS_EXCEPTION_ATTRIBUTE
  51 #define CPYCHECKER_SETS_EXCEPTION __attribute__ ((cpychecker_sets_exception))
  52 #else
  53 #define CPYCHECKER_SETS_EXCEPTION
  54 #endif
  55
  56 #ifdef WITH_CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION_ATTRIBUTE
  57 #define CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION               \
  58   __attribute__ ((cpychecker_negative_result_sets_exception))
  59 #else
  60 #define CPYCHECKER_NEGATIVE_RESULT_SETS_EXCEPTION
  61 #endif
  62
  63 #include <stdio.h>
  64
  65 /* Python 2.4 doesn't include stdint.h soon enough to get {u,}intptr_t
  66    needed by pyport.h.  */
  67 #include <stdint.h>
  68
  69 /* /usr/include/features.h on linux systems will define _POSIX_C_SOURCE
  70    if it sees _GNU_SOURCE (which config.h will define).
  71    pyconfig.h defines _POSIX_C_SOURCE to a different value than
  72    /usr/include/features.h does causing compilation to fail.
  73    To work around this, undef _POSIX_C_SOURCE before we include Python.h.
  74
  75    Same problem with _XOPEN_SOURCE.  */
  76 #undef _POSIX_C_SOURCE
  77 #undef _XOPEN_SOURCE
  78
  79 /* On sparc-solaris, /usr/include/sys/feature_tests.h defines
  80    _FILE_OFFSET_BITS, which pyconfig.h also defines.  Same work
  81    around technique as above.  */
  82 #undef _FILE_OFFSET_BITS
  83
  84 /* A kludge to avoid redefinition of snprintf on Windows by pyerrors.h.  */
  85 #if defined(_WIN32) && defined(HAVE_DECL_SNPRINTF)
  86 #define HAVE_SNPRINTF 1
  87 #endif
  88
  89 /* Request clean size types from Python.  */
  90 #define PY_SSIZE_T_CLEAN
  91
  92 /* Include the Python header files using angle brackets rather than
  93    double quotes.  On case-insensitive filesystems, this prevents us
  94    from including our python/python.h header file.  */
  95 #include <Python.h>
  96 #include <frameobject.h>
  97
  98 #if PY_MAJOR_VERSION >= 3
  99 #define IS_PY3K 1
 100 #endif
 101
 102 #ifdef IS_PY3K
 103 #define Py_TPFLAGS_HAVE_ITER 0
 104 #define Py_TPFLAGS_CHECKTYPES 0
 105
 106 #define PyInt_Check PyLong_Check
 107 #define PyInt_FromLong PyLong_FromLong
 108 #define PyInt_AsLong PyLong_AsLong
 109
 110 #define PyString_FromString PyUnicode_FromString
 111 #define PyString_Decode PyUnicode_Decode
 112 #define PyString_FromFormat PyUnicode_FromFormat
 113 #define PyString_Check PyUnicode_Check
 114 #endif
 115
 116 #if HAVE_LIBPYTHON2_4
 117 /* Py_ssize_t is not defined until 2.5.
 118    Logical type for Py_ssize_t is Py_intptr_t, but that fails in 64-bit
 119    compilation due to several apparent mistakes in python2.4 API, so we
 120    use 'int' instead.  */
 121 typedef int Py_ssize_t;
 122 #endif
 123
 124 #ifndef PyVarObject_HEAD_INIT
 125 /* Python 2.4 does not define PyVarObject_HEAD_INIT.  */
 126 #define PyVarObject_HEAD_INIT(type, size)       \
 127     PyObject_HEAD_INIT(type) size,
 128
 129 #endif
 130
 131 #ifndef Py_TYPE
 132 /* Python 2.4 does not define Py_TYPE.  */
 133 #define Py_TYPE(ob)             (((PyObject*)(ob))->ob_type)
 134 #endif
 135
 136 /* If Python.h does not define WITH_THREAD, then the various
 137    GIL-related functions will not be defined.  However,
 138    PyGILState_STATE will be.  */
 139 #ifndef WITH_THREAD
 140 #define PyGILState_Ensure() ((PyGILState_STATE) 0)
 141 #define PyGILState_Release(ARG) ((void)(ARG))
 142 #define PyEval_InitThreads()
 143 #define PyThreadState_Swap(ARG) ((void)(ARG))
 144 #define PyEval_ReleaseLock()
 145 #endif
 146
 147 /* Python supplies HAVE_LONG_LONG and some `long long' support when it
 148    is available.  These defines let us handle the differences more
 149    cleanly.  */
 150 #ifdef HAVE_LONG_LONG
 151
 152 #define GDB_PY_LL_ARG "L"
 153 #define GDB_PY_LLU_ARG "K"
 154 typedef PY_LONG_LONG gdb_py_longest;
 155 typedef unsigned PY_LONG_LONG gdb_py_ulongest;
 156 #define gdb_py_long_from_longest PyLong_FromLongLong
 157 #define gdb_py_long_from_ulongest PyLong_FromUnsignedLongLong
 158 #define gdb_py_long_as_ulongest PyLong_AsUnsignedLongLong
 159
 160 #else /* HAVE_LONG_LONG */
 161
 162 #define GDB_PY_LL_ARG "L"
 163 #define GDB_PY_LLU_ARG "K"
 164 typedef long gdb_py_longest;
 165 typedef unsigned long gdb_py_ulongest;
 166 #define gdb_py_long_from_longest PyLong_FromLong
 167 #define gdb_py_long_from_ulongest PyLong_FromUnsignedLong
 168 #define gdb_py_long_as_ulongest PyLong_AsUnsignedLong
 169
 170 #endif /* HAVE_LONG_LONG */
 171
 172
 173 /* In order to be able to parse symtab_and_line_to_sal_object function
 174    a real symtab_and_line structure is needed.  */
 175 #include "symtab.h"
 176
 177 /* Also needed to parse enum var_types. */
 178 #include "command.h"
 179 #include "breakpoint.h"
 180
 181 #include "exceptions.h"
 182
 183 enum gdbpy_iter_kind { iter_keys, iter_values, iter_items };
 184
 185 struct block;
 186 struct value;
 187 struct language_defn;
 188 struct program_space;
 189 struct bpstats;
 190 struct inferior;
 191
 192 extern PyObject *gdb_module;
 193 extern PyObject *gdb_python_module;
 194 extern PyTypeObject value_object_type
 195     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("value_object");
 196 extern PyTypeObject block_object_type
 197     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF("block_object");
 198 extern PyTypeObject symbol_object_type
 199     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("symbol_object");
 200 extern PyTypeObject event_object_type
 201     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
 202 extern PyTypeObject stop_event_object_type
 203     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("event_object");
 204 extern PyTypeObject breakpoint_object_type
 205     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("breakpoint_object");
 206 extern PyTypeObject frame_object_type
 207     CPYCHECKER_TYPE_OBJECT_FOR_TYPEDEF ("frame_object");
 208
 209 typedef struct breakpoint_object
 210 {
 211   PyObject_HEAD
 212
 213   /* The breakpoint number according to gdb.  */
 214   int number;
 215
 216   /* The gdb breakpoint object, or NULL if the breakpoint has been
 217      deleted.  */
 218   struct breakpoint *bp;
 219
 220   /* 1 is this is a FinishBreakpoint object, 0 otherwise.  */
 221   int is_finish_bp;
 222 } breakpoint_object;
 223
 224 /* Require that BREAKPOINT be a valid breakpoint ID; throw a Python
 225    exception if it is invalid.  */
 226 #define BPPY_REQUIRE_VALID(Breakpoint)                                  \
 227     do {                                                                \
 228       if ((Breakpoint)->bp == NULL)                                     \
 229         return PyErr_Format (PyExc_RuntimeError,                        \
 230                              _("Breakpoint %d is invalid."),            \
 231                              (Breakpoint)->number);                     \
 232     } while (0)
 233
 234 /* Require that BREAKPOINT be a valid breakpoint ID; throw a Python
 235    exception if it is invalid.  This macro is for use in setter functions.  */
 236 #define BPPY_SET_REQUIRE_VALID(Breakpoint)                              \
 237     do {                                                                \
 238       if ((Breakpoint)->bp == NULL)                                     \
 239         {                                                               \
 240           PyErr_Format (PyExc_RuntimeError, _("Breakpoint %d is invalid."), \
 241                         (Breakpoint)->number);                          \
 242           return -1;                                                    \
 243         }                                                               \
 244     } while (0)
 245
 246
 247 /* Variables used to pass information between the Breakpoint
 248    constructor and the breakpoint-created hook function.  */
 249 extern breakpoint_object *bppy_pending_object;
 250
 251
 252 typedef struct
 253 {
 254   PyObject_HEAD
 255
 256   /* The thread we represent.  */
 257   struct thread_info *thread;
 258
 259   /* The Inferior object to which this thread belongs.  */
 260   PyObject *inf_obj;
 261 } thread_object;
 262
 263 extern struct cmd_list_element *set_python_list;
 264 extern struct cmd_list_element *show_python_list;
 265
 266 PyObject *gdbpy_history (PyObject *self, PyObject *args);
 267 PyObject *gdbpy_breakpoints (PyObject *, PyObject *);
 268 PyObject *gdbpy_frame_stop_reason_string (PyObject *, PyObject *);
 269 PyObject *gdbpy_lookup_symbol (PyObject *self, PyObject *args, PyObject *kw);
 270 PyObject *gdbpy_lookup_global_symbol (PyObject *self, PyObject *args,
 271                                       PyObject *kw);
 272 PyObject *gdbpy_newest_frame (PyObject *self, PyObject *args);
 273 PyObject *gdbpy_selected_frame (PyObject *self, PyObject *args);
 274 PyObject *gdbpy_block_for_pc (PyObject *self, PyObject *args);
 275 PyObject *gdbpy_lookup_type (PyObject *self, PyObject *args, PyObject *kw);
 276 PyObject *gdbpy_create_lazy_string_object (CORE_ADDR address, long length,
 277                                            const char *encoding,
 278                                            struct type *type);
 279 PyObject *gdbpy_inferiors (PyObject *unused, PyObject *unused2);
 280 PyObject *gdbpy_selected_thread (PyObject *self, PyObject *args);
 281 PyObject *gdbpy_selected_inferior (PyObject *self, PyObject *args);
 282 PyObject *gdbpy_string_to_argv (PyObject *self, PyObject *args);
 283 PyObject *gdbpy_parameter (PyObject *self, PyObject *args);
 284 PyObject *gdbpy_parameter_value (enum var_types type, void *var);
 285 char *gdbpy_parse_command_name (const char *name,
 286                                 struct cmd_list_element ***base_list,
 287                                 struct cmd_list_element **start_list);
 288
 289 PyObject *symtab_and_line_to_sal_object (struct symtab_and_line sal);
 290 PyObject *symtab_to_symtab_object (struct symtab *symtab);
 291 PyObject *symbol_to_symbol_object (struct symbol *sym);
 292 PyObject *block_to_block_object (const struct block *block,
 293                                  struct objfile *objfile);
 294 PyObject *value_to_value_object (struct value *v);
 295 PyObject *type_to_type_object (struct type *);
 296 PyObject *frame_info_to_frame_object (struct frame_info *frame);
 297
 298 PyObject *pspace_to_pspace_object (struct program_space *)
 299     CPYCHECKER_RETURNS_BORROWED_REF;
 300 PyObject *pspy_get_printers (PyObject *, void *);
 301 PyObject *pspy_get_frame_filters (PyObject *, void *);
 302
 303 PyObject *objfile_to_objfile_object (struct objfile *)
 304     CPYCHECKER_RETURNS_BORROWED_REF;
 305 PyObject *objfpy_get_printers (PyObject *, void *);
 306 PyObject *objfpy_get_frame_filters (PyObject *, void *);
 307
 308 PyObject *gdbarch_to_arch_object (struct gdbarch *gdbarch);
 309
 310 thread_object *create_thread_object (struct thread_info *tp);
 311 thread_object *find_thread_object (ptid_t ptid)
 312     CPYCHECKER_RETURNS_BORROWED_REF;
 313 PyObject *find_inferior_object (int pid);
 314 PyObject *inferior_to_inferior_object (struct inferior *inferior);
 315
 316 const struct block *block_object_to_block (PyObject *obj);
 317 struct symbol *symbol_object_to_symbol (PyObject *obj);
 318 struct value *value_object_to_value (PyObject *self);
 319 struct value *convert_value_from_python (PyObject *obj);
 320 struct type *type_object_to_type (PyObject *obj);
 321 struct symtab *symtab_object_to_symtab (PyObject *obj);
 322 struct symtab_and_line *sal_object_to_symtab_and_line (PyObject *obj);
 323 struct frame_info *frame_object_to_frame_info (PyObject *frame_obj);
 324 struct gdbarch *arch_object_to_gdbarch (PyObject *obj);
 325
 326 void gdbpy_initialize_gdb_readline (void);
 327 void gdbpy_initialize_auto_load (void);
 328 void gdbpy_initialize_values (void);
 329 void gdbpy_initialize_frames (void);
 330 void gdbpy_initialize_symtabs (void);
 331 void gdbpy_initialize_commands (void);
 332 void gdbpy_initialize_symbols (void);
 333 void gdbpy_initialize_symtabs (void);
 334 void gdbpy_initialize_blocks (void);
 335 void gdbpy_initialize_types (void);
 336 void gdbpy_initialize_functions (void);
 337 void gdbpy_initialize_pspace (void);
 338 void gdbpy_initialize_objfile (void);
 339 void gdbpy_initialize_breakpoints (void);
 340 void gdbpy_initialize_finishbreakpoints (void);
 341 void gdbpy_initialize_lazy_string (void);
 342 void gdbpy_initialize_parameters (void);
 343 void gdbpy_initialize_thread (void);
 344 void gdbpy_initialize_inferior (void);
 345 void gdbpy_initialize_eventregistry (void);
 346 void gdbpy_initialize_event (void);
 347 void gdbpy_initialize_py_events (void);
 348 void gdbpy_initialize_stop_event (void);
 349 void gdbpy_initialize_signal_event (void);
 350 void gdbpy_initialize_breakpoint_event (void);
 351 void gdbpy_initialize_continue_event (void);
 352 void gdbpy_initialize_exited_event (void);
 353 void gdbpy_initialize_thread_event (void);
 354 void gdbpy_initialize_new_objfile_event (void);
 355 void gdbpy_initialize_arch (void);
 356
 357 struct cleanup *make_cleanup_py_decref (PyObject *py);
 358 struct cleanup *make_cleanup_py_xdecref (PyObject *py);
 359
 360 struct cleanup *ensure_python_env (struct gdbarch *gdbarch,
 361                                    const struct language_defn *language);
 362
 363 extern struct gdbarch *python_gdbarch;
 364 extern const struct language_defn *python_language;
 365
 366 /* Use this after a TRY_EXCEPT to throw the appropriate Python
 367    exception.  */
 368 #define GDB_PY_HANDLE_EXCEPTION(Exception)      \
 369   do {                                          \
 370     if (Exception.reason < 0)                   \
 371       {                                         \
 372         gdbpy_convert_exception (Exception);    \
 373         return NULL;                            \
 374       }                                         \
 375   } while (0)
 376
 377 /* Use this after a TRY_EXCEPT to throw the appropriate Python
 378    exception.  This macro is for use inside setter functions.  */
 379 #define GDB_PY_SET_HANDLE_EXCEPTION(Exception)                          \
 380     do {                                                                \
 381       if (Exception.reason < 0)                                         \
 382         {                                                               \
 383           gdbpy_convert_exception (Exception);                          \
 384           return -1;                                                    \
 385         }                                                               \
 386     } while (0)
 387
 388 void gdbpy_print_stack (void);
 389
 390 void source_python_script_for_objfile (struct objfile *objfile, FILE *file,
 391                                        const char *filename);
 392
 393 PyObject *python_string_to_unicode (PyObject *obj);
 394 char *unicode_to_target_string (PyObject *unicode_str);
 395 char *python_string_to_target_string (PyObject *obj);
 396 PyObject *python_string_to_target_python_string (PyObject *obj);
 397 char *python_string_to_host_string (PyObject *obj);
 398 int gdbpy_is_string (PyObject *obj);
 399 char *gdbpy_obj_to_string (PyObject *obj);
 400 char *gdbpy_exception_to_string (PyObject *ptype, PyObject *pvalue);
 401
 402 int gdbpy_is_lazy_string (PyObject *result);
 403 void gdbpy_extract_lazy_string (PyObject *string, CORE_ADDR *addr,
 404                                 struct type **str_type,
 405                                 long *length, char **encoding);
 406
 407 int gdbpy_is_value_object (PyObject *obj);
 408
 409 /* Note that these are declared here, and not in python.h with the
 410    other pretty-printer functions, because they refer to PyObject.  */
 411 PyObject *apply_varobj_pretty_printer (PyObject *print_obj,
 412                                        struct value **replacement,
 413                                        struct ui_file *stream);
 414 PyObject *gdbpy_get_varobj_pretty_printer (struct value *value);
 415 char *gdbpy_get_display_hint (PyObject *printer);
 416 PyObject *gdbpy_default_visualizer (PyObject *self, PyObject *args);
 417
 418 void bpfinishpy_pre_stop_hook (struct breakpoint_object *bp_obj);
 419 void bpfinishpy_post_stop_hook (struct breakpoint_object *bp_obj);
 420
 421 extern PyObject *gdbpy_doc_cst;
 422 extern PyObject *gdbpy_children_cst;
 423 extern PyObject *gdbpy_to_string_cst;
 424 extern PyObject *gdbpy_display_hint_cst;
 425 extern PyObject *gdbpy_enabled_cst;
 426 extern PyObject *gdbpy_value_cst;
 427
 428 /* Exception types.  */
 429 extern PyObject *gdbpy_gdb_error;
 430 extern PyObject *gdbpy_gdb_memory_error;
 431 extern PyObject *gdbpy_gdberror_exc;
 432
 433 extern void gdbpy_convert_exception (struct gdb_exception)
 434     CPYCHECKER_SETS_EXCEPTION;
 435
 436 int get_addr_from_python (PyObject *obj, CORE_ADDR *addr);
 437
 438 PyObject *gdb_py_object_from_longest (LONGEST l);
 439 PyObject *gdb_py_object_from_ulongest (ULONGEST l);
 440 int gdb_py_int_as_long (PyObject *, long *);
 441
 442 PyObject *gdb_py_generic_dict (PyObject *self, void *closure);
 443
 444 #endif /* GDB_PYTHON_INTERNAL_H */