Mercurial > hg > xemacs-beta
annotate src/vdb-mach.c @ 5127:a9c41067dd88 ben-lisp-object
more cleanups, terminology clarification, lots of doc work
-------------------- ChangeLog entries follow: --------------------
man/ChangeLog addition:
2010-03-05 Ben Wing <ben@xemacs.org>
* internals/internals.texi (Introduction to Allocation):
* internals/internals.texi (Integers and Characters):
* internals/internals.texi (Allocation from Frob Blocks):
* internals/internals.texi (lrecords):
* internals/internals.texi (Low-level allocation):
Rewrite section on allocation of Lisp objects to reflect the new
reality. Remove references to nonexistent XSETINT and XSETCHAR.
modules/ChangeLog addition:
2010-03-05 Ben Wing <ben@xemacs.org>
* postgresql/postgresql.c (allocate_pgconn):
* postgresql/postgresql.c (allocate_pgresult):
* postgresql/postgresql.h (struct Lisp_PGconn):
* postgresql/postgresql.h (struct Lisp_PGresult):
* ldap/eldap.c (allocate_ldap):
* ldap/eldap.h (struct Lisp_LDAP):
Same changes as in src/ dir. See large log there in ChangeLog,
but basically:
ALLOC_LISP_OBJECT -> ALLOC_NORMAL_LISP_OBJECT
LISP_OBJECT_HEADER -> NORMAL_LISP_OBJECT_HEADER
../hlo/src/ChangeLog addition:
2010-03-05 Ben Wing <ben@xemacs.org>
* alloc.c:
* alloc.c (old_alloc_sized_lcrecord):
* alloc.c (very_old_free_lcrecord):
* alloc.c (copy_lisp_object):
* alloc.c (zero_sized_lisp_object):
* alloc.c (zero_nonsized_lisp_object):
* alloc.c (lisp_object_storage_size):
* alloc.c (free_normal_lisp_object):
* alloc.c (FREE_FIXED_TYPE_WHEN_NOT_IN_GC):
* alloc.c (ALLOC_FROB_BLOCK_LISP_OBJECT):
* alloc.c (Fcons):
* alloc.c (noseeum_cons):
* alloc.c (make_float):
* alloc.c (make_bignum):
* alloc.c (make_bignum_bg):
* alloc.c (make_ratio):
* alloc.c (make_ratio_bg):
* alloc.c (make_ratio_rt):
* alloc.c (make_bigfloat):
* alloc.c (make_bigfloat_bf):
* alloc.c (size_vector):
* alloc.c (make_compiled_function):
* alloc.c (Fmake_symbol):
* alloc.c (allocate_extent):
* alloc.c (allocate_event):
* alloc.c (make_key_data):
* alloc.c (make_button_data):
* alloc.c (make_motion_data):
* alloc.c (make_process_data):
* alloc.c (make_timeout_data):
* alloc.c (make_magic_data):
* alloc.c (make_magic_eval_data):
* alloc.c (make_eval_data):
* alloc.c (make_misc_user_data):
* alloc.c (Fmake_marker):
* alloc.c (noseeum_make_marker):
* alloc.c (size_string_direct_data):
* alloc.c (make_uninit_string):
* alloc.c (make_string_nocopy):
* alloc.c (mark_lcrecord_list):
* alloc.c (alloc_managed_lcrecord):
* alloc.c (free_managed_lcrecord):
* alloc.c (sweep_lcrecords_1):
* alloc.c (malloced_storage_size):
* buffer.c (allocate_buffer):
* buffer.c (compute_buffer_usage):
* buffer.c (DEFVAR_BUFFER_LOCAL_1):
* buffer.c (nuke_all_buffer_slots):
* buffer.c (common_init_complex_vars_of_buffer):
* buffer.h (struct buffer_text):
* buffer.h (struct buffer):
* bytecode.c:
* bytecode.c (make_compiled_function_args):
* bytecode.c (size_compiled_function_args):
* bytecode.h (struct compiled_function_args):
* casetab.c (allocate_case_table):
* casetab.h (struct Lisp_Case_Table):
* charset.h (struct Lisp_Charset):
* chartab.c (fill_char_table):
* chartab.c (Fmake_char_table):
* chartab.c (make_char_table_entry):
* chartab.c (copy_char_table_entry):
* chartab.c (Fcopy_char_table):
* chartab.c (put_char_table):
* chartab.h (struct Lisp_Char_Table_Entry):
* chartab.h (struct Lisp_Char_Table):
* console-gtk-impl.h (struct gtk_device):
* console-gtk-impl.h (struct gtk_frame):
* console-impl.h (struct console):
* console-msw-impl.h (struct Lisp_Devmode):
* console-msw-impl.h (struct mswindows_device):
* console-msw-impl.h (struct msprinter_device):
* console-msw-impl.h (struct mswindows_frame):
* console-msw-impl.h (struct mswindows_dialog_id):
* console-stream-impl.h (struct stream_console):
* console-stream.c (stream_init_console):
* console-tty-impl.h (struct tty_console):
* console-tty-impl.h (struct tty_device):
* console-tty.c (allocate_tty_console_struct):
* console-x-impl.h (struct x_device):
* console-x-impl.h (struct x_frame):
* console.c (allocate_console):
* console.c (nuke_all_console_slots):
* console.c (DEFVAR_CONSOLE_LOCAL_1):
* console.c (common_init_complex_vars_of_console):
* data.c (make_weak_list):
* data.c (make_weak_box):
* data.c (make_ephemeron):
* database.c:
* database.c (struct Lisp_Database):
* database.c (allocate_database):
* database.c (finalize_database):
* device-gtk.c (allocate_gtk_device_struct):
* device-impl.h (struct device):
* device-msw.c:
* device-msw.c (mswindows_init_device):
* device-msw.c (msprinter_init_device):
* device-msw.c (finalize_devmode):
* device-msw.c (allocate_devmode):
* device-tty.c (allocate_tty_device_struct):
* device-x.c (allocate_x_device_struct):
* device.c:
* device.c (nuke_all_device_slots):
* device.c (allocate_device):
* dialog-msw.c (handle_question_dialog_box):
* elhash.c:
* elhash.c (struct Lisp_Hash_Table):
* elhash.c (finalize_hash_table):
* elhash.c (make_general_lisp_hash_table):
* elhash.c (Fcopy_hash_table):
* elhash.h (htentry):
* emacs.c (main_1):
* eval.c:
* eval.c (size_multiple_value):
* event-stream.c (finalize_command_builder):
* event-stream.c (allocate_command_builder):
* event-stream.c (free_command_builder):
* event-stream.c (event_stream_generate_wakeup):
* event-stream.c (event_stream_resignal_wakeup):
* event-stream.c (event_stream_disable_wakeup):
* event-stream.c (event_stream_wakeup_pending_p):
* events.h (struct Lisp_Timeout):
* events.h (struct command_builder):
* extents-impl.h:
* extents-impl.h (struct extent_auxiliary):
* extents-impl.h (struct extent_info):
* extents-impl.h (set_extent_no_chase_aux_field):
* extents-impl.h (set_extent_no_chase_normal_field):
* extents.c:
* extents.c (gap_array_marker):
* extents.c (gap_array):
* extents.c (extent_list_marker):
* extents.c (extent_list):
* extents.c (stack_of_extents):
* extents.c (gap_array_make_marker):
* extents.c (extent_list_make_marker):
* extents.c (allocate_extent_list):
* extents.c (SLOT):
* extents.c (mark_extent_auxiliary):
* extents.c (allocate_extent_auxiliary):
* extents.c (attach_extent_auxiliary):
* extents.c (size_gap_array):
* extents.c (finalize_extent_info):
* extents.c (allocate_extent_info):
* extents.c (uninit_buffer_extents):
* extents.c (allocate_soe):
* extents.c (copy_extent):
* extents.c (vars_of_extents):
* extents.h:
* faces.c (allocate_face):
* faces.h (struct Lisp_Face):
* faces.h (struct face_cachel):
* file-coding.c:
* file-coding.c (finalize_coding_system):
* file-coding.c (sizeof_coding_system):
* file-coding.c (Fcopy_coding_system):
* file-coding.h (struct Lisp_Coding_System):
* file-coding.h (MARKED_SLOT):
* fns.c (size_bit_vector):
* font-mgr.c:
* font-mgr.c (finalize_fc_pattern):
* font-mgr.c (print_fc_pattern):
* font-mgr.c (Ffc_pattern_p):
* font-mgr.c (Ffc_pattern_create):
* font-mgr.c (Ffc_name_parse):
* font-mgr.c (Ffc_name_unparse):
* font-mgr.c (Ffc_pattern_duplicate):
* font-mgr.c (Ffc_pattern_add):
* font-mgr.c (Ffc_pattern_del):
* font-mgr.c (Ffc_pattern_get):
* font-mgr.c (fc_config_create_using):
* font-mgr.c (fc_strlist_to_lisp_using):
* font-mgr.c (fontset_to_list):
* font-mgr.c (Ffc_config_p):
* font-mgr.c (Ffc_config_up_to_date):
* font-mgr.c (Ffc_config_build_fonts):
* font-mgr.c (Ffc_config_get_cache):
* font-mgr.c (Ffc_config_get_fonts):
* font-mgr.c (Ffc_config_set_current):
* font-mgr.c (Ffc_config_get_blanks):
* font-mgr.c (Ffc_config_get_rescan_interval):
* font-mgr.c (Ffc_config_set_rescan_interval):
* font-mgr.c (Ffc_config_app_font_add_file):
* font-mgr.c (Ffc_config_app_font_add_dir):
* font-mgr.c (Ffc_config_app_font_clear):
* font-mgr.c (size):
* font-mgr.c (Ffc_config_substitute):
* font-mgr.c (Ffc_font_render_prepare):
* font-mgr.c (Ffc_font_match):
* font-mgr.c (Ffc_font_sort):
* font-mgr.c (finalize_fc_config):
* font-mgr.c (print_fc_config):
* font-mgr.h:
* font-mgr.h (struct fc_pattern):
* font-mgr.h (XFC_PATTERN):
* font-mgr.h (struct fc_config):
* font-mgr.h (XFC_CONFIG):
* frame-gtk.c (allocate_gtk_frame_struct):
* frame-impl.h (struct frame):
* frame-msw.c (mswindows_init_frame_1):
* frame-x.c (allocate_x_frame_struct):
* frame.c (nuke_all_frame_slots):
* frame.c (allocate_frame_core):
* gc.c:
* gc.c (GC_CHECK_NOT_FREE):
* glyphs.c (finalize_image_instance):
* glyphs.c (allocate_image_instance):
* glyphs.c (Fcolorize_image_instance):
* glyphs.c (allocate_glyph):
* glyphs.c (unmap_subwindow_instance_cache_mapper):
* glyphs.c (register_ignored_expose):
* glyphs.h (struct Lisp_Image_Instance):
* glyphs.h (struct Lisp_Glyph):
* glyphs.h (struct glyph_cachel):
* glyphs.h (struct expose_ignore):
* gui.c (allocate_gui_item):
* gui.h (struct Lisp_Gui_Item):
* keymap.c (struct Lisp_Keymap):
* keymap.c (make_keymap):
* lisp.h:
* lisp.h (struct Lisp_String_Direct_Data):
* lisp.h (struct Lisp_String_Indirect_Data):
* lisp.h (struct Lisp_Vector):
* lisp.h (struct Lisp_Bit_Vector):
* lisp.h (DECLARE_INLINE_LISP_BIT_VECTOR):
* lisp.h (struct weak_box):
* lisp.h (struct ephemeron):
* lisp.h (struct weak_list):
* lrecord.h:
* lrecord.h (struct lrecord_implementation):
* lrecord.h (MC_ALLOC_CALL_FINALIZER):
* lrecord.h (struct lcrecord_list):
* lstream.c (finalize_lstream):
* lstream.c (sizeof_lstream):
* lstream.c (Lstream_new):
* lstream.c (Lstream_delete):
* lstream.h (struct lstream):
* marker.c:
* marker.c (finalize_marker):
* marker.c (compute_buffer_marker_usage):
* mule-charset.c:
* mule-charset.c (make_charset):
* mule-charset.c (compute_charset_usage):
* objects-impl.h (struct Lisp_Color_Instance):
* objects-impl.h (struct Lisp_Font_Instance):
* objects-tty-impl.h (struct tty_color_instance_data):
* objects-tty-impl.h (struct tty_font_instance_data):
* objects-tty.c (tty_initialize_color_instance):
* objects-tty.c (tty_initialize_font_instance):
* objects.c (finalize_color_instance):
* objects.c (Fmake_color_instance):
* objects.c (finalize_font_instance):
* objects.c (Fmake_font_instance):
* objects.c (reinit_vars_of_objects):
* opaque.c:
* opaque.c (sizeof_opaque):
* opaque.c (make_opaque_ptr):
* opaque.c (free_opaque_ptr):
* opaque.h:
* opaque.h (Lisp_Opaque):
* opaque.h (Lisp_Opaque_Ptr):
* print.c (printing_unreadable_lcrecord):
* print.c (external_object_printer):
* print.c (debug_p4):
* process.c (finalize_process):
* process.c (make_process_internal):
* procimpl.h (struct Lisp_Process):
* rangetab.c (Fmake_range_table):
* rangetab.c (Fcopy_range_table):
* rangetab.h (struct Lisp_Range_Table):
* scrollbar.c:
* scrollbar.c (create_scrollbar_instance):
* scrollbar.c (compute_scrollbar_instance_usage):
* scrollbar.h (struct scrollbar_instance):
* specifier.c (finalize_specifier):
* specifier.c (sizeof_specifier):
* specifier.c (set_specifier_caching):
* specifier.h (struct Lisp_Specifier):
* specifier.h (struct specifier_caching):
* symeval.h:
* symeval.h (SYMBOL_VALUE_MAGIC_P):
* symeval.h (DEFVAR_SYMVAL_FWD):
* symsinit.h:
* syntax.c (init_buffer_syntax_cache):
* syntax.h (struct syntax_cache):
* toolbar.c:
* toolbar.c (allocate_toolbar_button):
* toolbar.c (update_toolbar_button):
* toolbar.h (struct toolbar_button):
* tooltalk.c (struct Lisp_Tooltalk_Message):
* tooltalk.c (make_tooltalk_message):
* tooltalk.c (struct Lisp_Tooltalk_Pattern):
* tooltalk.c (make_tooltalk_pattern):
* ui-gtk.c:
* ui-gtk.c (allocate_ffi_data):
* ui-gtk.c (emacs_gtk_object_finalizer):
* ui-gtk.c (allocate_emacs_gtk_object_data):
* ui-gtk.c (allocate_emacs_gtk_boxed_data):
* ui-gtk.h:
* window-impl.h (struct window):
* window-impl.h (struct window_mirror):
* window.c (finalize_window):
* window.c (allocate_window):
* window.c (new_window_mirror):
* window.c (mark_window_as_deleted):
* window.c (make_dummy_parent):
* window.c (compute_window_mirror_usage):
* window.c (compute_window_usage):
Overall point of this change and previous ones in this repository:
(1) Introduce new, clearer terminology: everything other than int
or char is a "record" object, which comes in two types: "normal
objects" and "frob-block objects". Fix up all places that
referred to frob-block objects as "simple", "basic", etc.
(2) Provide an advertised interface for doing operations on Lisp
objects, including creating new types, that is clean and
consistent in its naming, uses the above-referenced terms and
avoids referencing "lrecords", "old lcrecords", etc., which should
hide under the surface.
(3) Make the size_in_bytes and finalizer methods take a
Lisp_Object rather than a void * for consistency with other methods.
(4) Separate finalizer method into finalizer and disksaver, so
that normal finalize methods don't have to worry about disksaving.
Other specifics:
(1) Renaming:
LISP_OBJECT_HEADER -> NORMAL_LISP_OBJECT_HEADER
ALLOC_LISP_OBJECT -> ALLOC_NORMAL_LISP_OBJECT
implementation->basic_p -> implementation->frob_block_p
ALLOCATE_FIXED_TYPE_AND_SET_IMPL -> ALLOC_FROB_BLOCK_LISP_OBJECT
*FCCONFIG*, wrap_fcconfig -> *FC_CONFIG*, wrap_fc_config
*FCPATTERN*, wrap_fcpattern -> *FC_PATTERN*, wrap_fc_pattern
(the last two changes make the naming of these macros consistent
with the naming of all other macros, since the objects are named
fc-config and fc-pattern with a hyphen)
(2) Lots of documentation fixes in lrecord.h.
(3) Eliminate macros for copying, freeing, zeroing objects, getting
their storage size. Instead, new functions:
zero_sized_lisp_object()
zero_nonsized_lisp_object()
lisp_object_storage_size()
free_normal_lisp_object()
(copy_lisp_object() already exists)
LISP_OBJECT_FROB_BLOCK_P() (actually a macro)
Eliminated:
free_lrecord()
zero_lrecord()
copy_lrecord()
copy_sized_lrecord()
old_copy_lcrecord()
old_copy_sized_lcrecord()
old_zero_lcrecord()
old_zero_sized_lcrecord()
LISP_OBJECT_STORAGE_SIZE()
COPY_SIZED_LISP_OBJECT()
COPY_SIZED_LCRECORD()
COPY_LISP_OBJECT()
ZERO_LISP_OBJECT()
FREE_LISP_OBJECT()
(4) Catch the remaining places where lrecord stuff was used directly
and use the advertised interface, e.g. alloc_sized_lrecord() ->
ALLOC_SIZED_LISP_OBJECT().
(5) Make certain statically-declared pseudo-objects
(buffer_local_flags, console_local_flags) have their lheader
initialized correctly, so things like copy_lisp_object() can work
on them. Make extent_auxiliary_defaults a proper heap object
Vextent_auxiliary_defaults, and make extent auxiliaries dumpable
so that this object can be dumped. allocate_extent_auxiliary()
now just creates the object, and attach_extent_auxiliary()
creates an extent auxiliary and attaches to an extent, like the
old allocate_extent_auxiliary().
(6) Create EXTENT_AUXILIARY_SLOTS macro, similar to the foo-slots.h
files but in a macro instead of a file. The purpose is to avoid
duplication when iterating over all the slots in an extent auxiliary.
Use it.
(7) In lstream.c, don't zero out object after allocation because
allocation routines take care of this.
(8) In marker.c, fix a mistake in computing marker overhead.
(9) In print.c, clean up printing_unreadable_lcrecord(),
external_object_printer() to avoid lots of ifdef NEW_GC's.
(10) Separate toolbar-button allocation into a separate
allocate_toolbar_button() function for use in the example code
in lrecord.h.
| author | Ben Wing <ben@xemacs.org> |
|---|---|
| date | Fri, 05 Mar 2010 04:08:17 -0600 |
| parents | 141c2920ea48 |
| children | 308d34e9f07d |
| rev | line source |
|---|---|
| 3092 | 1 /* Virtual diry bit implementation for XEmacs. |
| 2 Copyright (C) 2005 Marcus Crestani. | |
| 3 | |
| 4 This file is part of XEmacs. | |
| 5 | |
| 6 XEmacs is free software; you can redistribute it and/or modify it | |
| 7 under the terms of the GNU General Public License as published by the | |
| 8 Free Software Foundation; either version 2, or (at your option) any | |
| 9 later version. | |
| 10 | |
| 11 XEmacs is distributed in the hope that it will be useful, but WITHOUT | |
| 12 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 14 for more details. | |
| 15 | |
| 16 You should have received a copy of the GNU General Public License | |
| 17 along with XEmacs; see the file COPYING. If not, write to | |
| 18 the Free Software Foundation, Inc., 59 Temple Place - Suite 330, | |
| 19 Boston, MA 02111-1307, USA. */ | |
| 20 | |
| 21 /* Synched up with: Not in FSF. */ | |
| 22 | |
| 23 #include <config.h> | |
| 24 #include "lisp.h" | |
| 25 #include "gc.h" | |
| 26 #include "mc-alloc.h" | |
| 27 #include "vdb.h" | |
| 28 | |
| 29 #include <errno.h> | |
| 30 #include <signal.h> | |
| 31 #include <sys/mman.h> | |
| 32 #include <sys/time.h> | |
| 33 #include <sys/resource.h> | |
| 34 #include <unistd.h> | |
| 35 #include <mach/mach.h> | |
| 36 #include <mach/mach_error.h> | |
| 37 #include <architecture/ppc/cframe.h> | |
| 38 | |
| 39 | |
| 40 /* the structure of an exception msg and its reply */ | |
| 41 typedef struct rep_msg { | |
| 42 mach_msg_header_t head; | |
| 43 NDR_record_t NDR; | |
| 44 kern_return_t ret_code; | |
| 45 } mach_reply_msg_t; | |
| 46 | |
| 47 typedef struct exc_msg { | |
| 48 mach_msg_header_t head; | |
| 49 /* start of the kernel processed data */ | |
| 50 mach_msg_body_t msgh_body; | |
| 51 mach_msg_port_descriptor_t thread; | |
| 52 mach_msg_port_descriptor_t task; | |
| 53 /* end of the kernel processed data */ | |
| 54 NDR_record_t NDR; | |
| 55 exception_type_t exception; | |
| 56 mach_msg_type_number_t code_cnt; | |
| 57 exception_data_t code; | |
| 58 /* some padding */ | |
| 59 char pad[512]; | |
| 60 } mach_exc_msg_t; | |
| 61 | |
| 62 /* this is a neat little mach callback */ | |
| 63 extern boolean_t exc_server(mach_msg_header_t *in, mach_msg_header_t *out); | |
| 64 | |
| 65 /* these are the globals everyone needs */ | |
| 66 static size_t page_size = 16384; | |
| 67 static mach_port_t task_self = NULL; | |
| 68 static mach_port_t exc_port = NULL; | |
| 69 | |
| 70 /* these are some less neat mach callbacks */ | |
| 71 kern_return_t | |
| 72 catch_exception_raise_state | |
| 73 (mach_port_t UNUSED (port), | |
| 74 exception_type_t UNUSED (exception_type), | |
| 75 exception_data_t UNUSED (exception_data), | |
| 76 mach_msg_type_number_t UNUSED (data_cnt), | |
| 77 thread_state_flavor_t *UNUSED (flavor), | |
| 78 thread_state_t UNUSED (in_state), | |
| 79 mach_msg_type_number_t UNUSED (is_cnt), | |
| 80 thread_state_t UNUSED (out_state), | |
| 81 mach_msg_type_number_t UNUSED (os_cnt)) | |
| 82 { | |
| 83 return KERN_FAILURE; | |
| 84 } | |
| 85 | |
| 86 kern_return_t | |
| 87 catch_exception_raise_state_identitity | |
| 88 (mach_port_t UNUSED (port), | |
| 89 mach_port_t UNUSED (thread_port), | |
| 90 mach_port_t UNUSED (task_port), | |
| 91 exception_type_t UNUSED (exception_type), | |
| 92 exception_data_t UNUSED (exception_data), | |
| 93 mach_msg_type_number_t UNUSED (data_count), | |
| 94 thread_state_flavor_t *UNUSED (state_flavor), | |
| 95 thread_state_t UNUSED (in_state), | |
| 96 mach_msg_type_number_t UNUSED (in_state_count), | |
| 97 thread_state_t UNUSED (out_state), | |
| 98 mach_msg_type_number_t UNUSED (out_state_count)) | |
| 99 { | |
| 100 return KERN_FAILURE; | |
| 101 } | |
| 102 | |
| 103 kern_return_t | |
| 104 catch_exception_raise | |
| 105 (mach_port_t UNUSED (port), | |
| 106 mach_port_t UNUSED (thread_port), | |
| 107 mach_port_t UNUSED (task_port), | |
| 108 exception_type_t UNUSED (exception_type), | |
| 109 exception_data_t exception_data, | |
| 110 mach_msg_type_number_t UNUSED (data_count)) | |
| 111 { | |
| 112 /* kernel return value is in exception_data[0], faulting address in | |
| 113 exception_data[1] */ | |
| 114 if (write_barrier_enabled | |
| 115 && (fault_on_protected_page ((void *) exception_data[1])) | |
| 116 && exception_data[0] == KERN_PROTECTION_FAILURE) | |
| 117 { | |
| 118 vdb_designate_modified ((void *) exception_data[1]); | |
| 119 unprotect_page_and_mark_dirty ((void *) exception_data[1]); | |
| 120 return KERN_SUCCESS; | |
| 121 } | |
| 122 else /* default sigsegv handler */ | |
| 123 { | |
| 124 fprintf (stderr, "\n\nFatal Error: Received %s (%d) for address 0x%x\n", | |
| 125 "EXC_BAD_ACCESS", exception_data[0], (int) exception_data[1]); | |
| 126 return KERN_FAILURE; | |
| 127 } | |
| 128 } | |
| 129 | |
| 130 /* this is the thread which forwards of exceptions read from the exception | |
| 131 server off to our exception catchers and then back out to the other | |
| 132 thread */ | |
| 133 void | |
| 134 exception_thread(void) | |
| 135 { | |
| 136 mach_msg_header_t *message; | |
| 137 mach_msg_header_t *reply; | |
| 138 kern_return_t retval; | |
| 139 | |
| 140 /* allocate the space for the message and reply */ | |
| 141 message = (mach_msg_header_t *) malloc (sizeof (mach_exc_msg_t)); | |
| 142 reply = (mach_msg_header_t *) malloc (sizeof (mach_reply_msg_t)); | |
| 143 /* do this loop forever */ | |
| 144 while (1) | |
| 145 { | |
| 146 /* block until we get an exception message */ | |
| 147 retval = mach_msg (message, MACH_RCV_MSG, 0, sizeof (mach_exc_msg_t), | |
| 148 exc_port, MACH_MSG_TIMEOUT_NONE, MACH_PORT_NULL); | |
| 149 /* forward off the handling of this message */ | |
| 150 if (!exc_server (message, reply)) | |
| 151 { | |
| 152 fprintf (stderr, "INTERNAL ERROR: exc_server() failed.\n"); | |
| 153 ABORT (); | |
| 154 } | |
| 155 /* send the message back out to the thread */ | |
| 156 retval = mach_msg (reply, MACH_SEND_MSG, sizeof (mach_reply_msg_t), 0, | |
| 157 MACH_PORT_NULL, MACH_MSG_TIMEOUT_NONE, | |
| 158 MACH_PORT_NULL); | |
| 159 } | |
| 160 } | |
| 161 | |
| 162 /* this initializes the subsystem (sets the exception port, starts the | |
| 163 exception handling thread, etc) */ | |
| 164 void | |
| 165 vdb_install_signal_handler (void) | |
| 166 { | |
| 167 mach_port_t thread_self, exc_port_s, exc_thread; | |
| 168 ppc_thread_state_t *exc_thread_state; | |
| 169 mach_msg_type_name_t type; | |
| 170 void *subthread_stack; | |
| 171 kern_return_t retval; | |
| 172 | |
| 173 /* get ids for ourself */ | |
| 174 if (!task_self) | |
| 175 task_self = mach_task_self (); | |
| 176 thread_self = mach_thread_self (); | |
| 177 | |
| 178 /* allocate the port we're going to get exceptions on */ | |
| 179 retval = mach_port_allocate (task_self, MACH_PORT_RIGHT_RECEIVE, &exc_port); | |
| 180 if (retval != KERN_SUCCESS) | |
| 181 { | |
| 182 fprintf (stderr, "Couldn't allocate exception port: %s\n", | |
| 183 mach_error_string (retval)); | |
| 184 ABORT (); | |
| 185 } | |
| 186 | |
| 187 /* extract out the send rights for that port, which the OS needs */ | |
| 188 retval = mach_port_extract_right (task_self, exc_port, | |
| 189 MACH_MSG_TYPE_MAKE_SEND, | |
| 190 &exc_port_s, &type); | |
| 191 if(retval != KERN_SUCCESS) | |
| 192 { | |
| 193 fprintf (stderr, "Couldn't extract send rights: %s\n", | |
| 194 mach_error_string (retval)); | |
| 195 ABORT (); | |
| 196 } | |
| 197 | |
| 198 /* set the exception ports for this thread to the above */ | |
| 199 retval = thread_set_exception_ports(thread_self, EXC_MASK_BAD_ACCESS, | |
| 200 exc_port_s, EXCEPTION_DEFAULT, | |
| 201 PPC_THREAD_STATE); | |
| 202 if(retval != KERN_SUCCESS) | |
| 203 { | |
| 204 fprintf (stderr, "Couldn't set exception ports: %s\n", | |
| 205 mach_error_string (retval)); | |
| 206 ABORT (); | |
| 207 } | |
| 208 | |
| 209 /* set up the subthread */ | |
| 210 retval = thread_create(task_self, &exc_thread); | |
| 211 if(retval != KERN_SUCCESS) | |
| 212 { | |
| 213 fprintf (stderr , "Couldn't create exception thread: %s\n", | |
| 214 mach_error_string (retval)); | |
| 215 ABORT (); | |
| 216 } | |
| 217 subthread_stack = (void *) malloc (page_size); | |
| 218 subthread_stack = | |
| 219 (char *) subthread_stack + (page_size - C_ARGSAVE_LEN - C_RED_ZONE); | |
| 220 exc_thread_state = | |
| 221 (ppc_thread_state_t *) malloc (sizeof (ppc_thread_state_t)); | |
| 222 exc_thread_state->srr0 = (unsigned int) exception_thread; | |
| 223 exc_thread_state->r1 = (unsigned int) subthread_stack; | |
| 224 retval = thread_set_state (exc_thread, PPC_THREAD_STATE, | |
| 225 (thread_state_t) exc_thread_state, | |
| 226 PPC_THREAD_STATE_COUNT); | |
| 227 if (retval != KERN_SUCCESS) | |
| 228 { | |
| 229 fprintf (stderr, "Couldn't set subthread state: %s\n", | |
| 230 mach_error_string (retval)); | |
| 231 ABORT (); | |
| 232 } | |
| 233 retval = thread_resume (exc_thread); | |
| 234 if (retval != KERN_SUCCESS) | |
| 235 { | |
| 236 fprintf (stderr, "Couldn't resume subthread: %s\n", | |
| 237 mach_error_string (retval)); | |
| 238 ABORT (); | |
| 239 } | |
| 240 allow_incremental_gc = 1; | |
| 241 } | |
| 242 | |
| 243 void | |
| 244 vdb_protect (void *ptr, EMACS_INT len) | |
| 245 { | |
| 246 if (mprotect (ptr, len, PROT_READ)) | |
| 247 { | |
| 248 perror ("Couldn't mprotect"); | |
| 249 ABORT (); | |
| 250 } | |
| 251 } | |
| 252 | |
| 253 void | |
| 254 vdb_unprotect (void *ptr, EMACS_INT len) | |
| 255 { | |
| 256 if (mprotect (ptr, len, PROT_READ | PROT_WRITE)) | |
| 257 { | |
| 258 perror ("Couldn't mprotect"); | |
| 259 ABORT (); | |
| 260 } | |
| 261 } |