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Removed last bits of legacy code from libobjc2. Added new exception handling implementation.

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theraven 16 years ago
parent 0e374db1db
commit 07758fe521
22 changed files with 566 additions and 3244 deletions
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This document governs the GNUstep Objective-C runtime. This is based on the Copyright (c) 2009 David Chisnall
GCC Objective-C runtime, which is governed by version 3 of the GNU General
Public License and on the Étoilé Objective-C 2 framework and Objective-C
runtime, which are MIT licensed.
As a result of this dual inheritance, some portions of this library are more Permission is hereby granted, free of charge, to any person obtaining a copy
permissively licensed than the whole. When viewed in aggregate, this library of this software and associated documentation files (the "Software"), to deal
is licensed under the GNU General Public Licence, version 3 or later (at your in the Software without restriction, including without limitation the rights
option). You may find the relevant license texts in full in the following to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
files in this distribution: copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
COPYING3 contains the GNU general public license version 3. The above copyright notice and this permission notice shall be included in
COPYING.RUNTIME contains the GCC runtime exemption to the GNU GPL. all copies or substantial portions of the Software.
Some individual files retain their original MIT license. These are: THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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THE SOFTWARE.
blocks_runtime.m
class_table.c
hash_table.h
ivar.c
lock.h
mutation.m
pool.h
runtime.c
string_hash.c
sync.m
objc/blocks_runtime.h
objc/runtime.h
NSBlocks.m
All of the private headers (those not in the objc/ directory) are also covered
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These files may be used for any purpose, including binary-only redistribution,
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COPYING.MIT

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Copyright (c) 2009 David Chisnall
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
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THE SOFTWARE.

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otherwise be available to you under applicable patent law.
12. No Surrender of Others' Freedom.
If conditions are imposed on you (whether by court order, agreement or
otherwise) that contradict the conditions of this License, they do not
excuse you from the conditions of this License. If you cannot convey a
covered work so as to satisfy simultaneously your obligations under this
License and any other pertinent obligations, then as a consequence you may
not convey it at all. For example, if you agree to terms that obligate you
to collect a royalty for further conveying from those to whom you convey
the Program, the only way you could satisfy both those terms and this
License would be to refrain entirely from conveying the Program.
13. Use with the GNU Affero General Public License.
Notwithstanding any other provision of this License, you have
permission to link or combine any covered work with a work licensed
under version 3 of the GNU Affero General Public License into a single
combined work, and to convey the resulting work. The terms of this
License will continue to apply to the part which is the covered work,
but the special requirements of the GNU Affero General Public License,
section 13, concerning interaction through a network will apply to the
combination as such.
14. Revised Versions of this License.
The Free Software Foundation may publish revised and/or new versions of
the GNU General Public License from time to time. Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.
Each version is given a distinguishing version number. If the
Program specifies that a certain numbered version of the GNU General
Public License "or any later version" applies to it, you have the
option of following the terms and conditions either of that numbered
version or of any later version published by the Free Software
Foundation. If the Program does not specify a version number of the
GNU General Public License, you may choose any version ever published
by the Free Software Foundation.
If the Program specifies that a proxy can decide which future
versions of the GNU General Public License can be used, that proxy's
public statement of acceptance of a version permanently authorizes you
to choose that version for the Program.
Later license versions may give you additional or different
permissions. However, no additional obligations are imposed on any
author or copyright holder as a result of your choosing to follow a
later version.
15. Disclaimer of Warranty.
THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
16. Limitation of Liability.
IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
SUCH DAMAGES.
17. Interpretation of Sections 15 and 16.
If the disclaimer of warranty and limitation of liability provided
above cannot be given local legal effect according to their terms,
reviewing courts shall apply local law that most closely approximates
an absolute waiver of all civil liability in connection with the
Program, unless a warranty or assumption of liability accompanies a
copy of the Program in return for a fee.
END OF TERMS AND CONDITIONS
How to Apply These Terms to Your New Programs
If you develop a new program, and you want it to be of the greatest
possible use to the public, the best way to achieve this is to make it
free software which everyone can redistribute and change under these terms.
To do so, attach the following notices to the program. It is safest
to attach them to the start of each source file to most effectively
state the exclusion of warranty; and each file should have at least
the "copyright" line and a pointer to where the full notice is found.
<one line to give the program's name and a brief idea of what it does.>
Copyright (C) <year> <name of author>
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/>.
Also add information on how to contact you by electronic and paper mail.
If the program does terminal interaction, make it output a short
notice like this when it starts in an interactive mode:
<program> Copyright (C) <year> <name of author>
This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
This is free software, and you are welcome to redistribute it
under certain conditions; type `show c' for details.
The hypothetical commands `show w' and `show c' should show the appropriate
parts of the General Public License. Of course, your program's commands
might be different; for a GUI interface, you would use an "about box".
You should also get your employer (if you work as a programmer) or school,
if any, to sign a "copyright disclaimer" for the program, if necessary.
For more information on this, and how to apply and follow the GNU GPL, see
<http://www.gnu.org/licenses/>.
The GNU General Public License does not permit incorporating your program
into proprietary programs. If your program is a subroutine library, you
may consider it more useful to permit linking proprietary applications with
the library. If this is what you want to do, use the GNU Lesser General
Public License instead of this License. But first, please read
<http://www.gnu.org/philosophy/why-not-lgpl.html>.

18
GNUmakefile
Unescape Escape View File

@ -22,7 +22,7 @@ libobjc_C_FILES = \
dtable.c\ dtable.c\
encoding2.c\ encoding2.c\
hash_table.c\ hash_table.c\
exception.c\ eh_personality.c\
hooks.c\ hooks.c\
ivar.c\ ivar.c\
loader.c\ loader.c\
@ -38,6 +38,7 @@ libobjc_C_FILES += \
legacy_malloc.c\ legacy_malloc.c\
objects.c\ objects.c\
thr.c thr.c
endif endif
libobjc_HEADER_FILES_DIR = objc libobjc_HEADER_FILES_DIR = objc
@ -45,22 +46,9 @@ libobjc_HEADER_FILES_INSTALL_DIR = objc
ifneq ($(install_headers), no) ifneq ($(install_headers), no)
libobjc_HEADER_FILES = \ libobjc_HEADER_FILES = \
Availability.h\ Availability.h\
NXConstStr.h\
Object.h\
Protocol.h\
blocks_runtime.h\ blocks_runtime.h\
encoding.h\
hash.h\
objc-api.h\
objc-decls.h\
objc-list.h\
objc.h\
runtime-legacy.h\
runtime.h\ runtime.h\
sarray.h\ slot.h
slot.h\
thr.h\
typedstream.h
endif endif
libobjc_LIBRARIES_DEPEND_UPON += -lpthread libobjc_LIBRARIES_DEPEND_UPON += -lpthread

317
dwarf_eh.h
Unescape Escape View File

@ -0,0 +1,317 @@
/**
* This file is Copyright PathScale 2010. Permission granted to distribute
* according to the terms of the MIT license (see COPYING.MIT)
*/
#include <assert.h>
#include <stdint.h>
// _GNU_SOURCE must be defiend for unwind.h to expose some of the functions
// that we want. If it isn't, then we define it and undefine it to make sure
// that it doesn't impact the rest of the program.
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
# include <unwind.h>
# undef _GNU_SOURCE
#else
# include <unwind.h>
#endif
typedef unsigned char *dw_eh_ptr_t;
// Flag indicating a signed quantity
#define DW_EH_PE_signed 0x08
/// DWARF data encoding types
enum dwarf_data_encoding
{
// Unsigned, little-endian, base 128-encoded (variable length)
DW_EH_PE_uleb128 = 0x01,
// uint16
DW_EH_PE_udata2 = 0x02,
// uint32
DW_EH_PE_udata4 = 0x03,
// uint64
DW_EH_PE_udata8 = 0x04,
// Signed versions of the above:
DW_EH_PE_sleb128 = DW_EH_PE_uleb128 | DW_EH_PE_signed,
DW_EH_PE_sdata2 = DW_EH_PE_udata2 | DW_EH_PE_signed,
DW_EH_PE_sdata4 = DW_EH_PE_udata4 | DW_EH_PE_signed,
DW_EH_PE_sdata8 = DW_EH_PE_udata8 | DW_EH_PE_signed
};
static inline enum dwarf_data_encoding get_encoding(unsigned char x)
{
return (enum dwarf_data_encoding)(x & 0xf);
}
enum dwarf_data_relative
{
// Value is omitted
DW_EH_PE_omit = 0xff,
// Absolute pointer value
DW_EH_PE_absptr = 0x00,
// Value relative to program counter
DW_EH_PE_pcrel = 0x10,
// Value relative to the text segment
DW_EH_PE_textrel = 0x20,
// Value relative to the data segment
DW_EH_PE_datarel = 0x30,
// Value relative to the start of the function
DW_EH_PE_funcrel = 0x40,
// Aligned pointer (Not supported yet - are they actually used?)
DW_EH_PE_aligned = 0x50,
// Pointer points to address of real value
DW_EH_PE_indirect = 0x80
};
static inline enum dwarf_data_relative get_base(unsigned char x)
{
return (enum dwarf_data_relative)(x & 0x70);
}
static int is_indirect(unsigned char x)
{
return (x & DW_EH_PE_indirect);
}
static inline int dwarf_size_of_fixed_size_field(unsigned char type)
{
// Low three bits indicate size...
switch (type & 7)
{
case DW_EH_PE_udata2: return 2;
case DW_EH_PE_udata4: return 4;
case DW_EH_PE_udata8: return 8;
case DW_EH_PE_absptr: return sizeof(void*);
}
abort();
}
/**
* Read an unsigned, little-endian, base-128, DWARF value. Updates *data to
* point to the end of the value.
*/
static uint64_t read_leb128(unsigned char** data, int *b)
{
uint64_t uleb = 0;
unsigned int bit = 0;
unsigned char digit = 0;
// We have to read at least one octet, and keep reading until we get to one
// with the high bit unset
do
{
// This check is a bit too strict - we should also check the highest
// bit of the digit.
assert(bit < sizeof(uint64_t) * 8);
// Get the base 128 digit
digit = (**data) & 0x7f;
// Add it to the current value
uleb += digit << bit;
// Increase the shift value
bit += 7;
// Proceed to the next octet
(*data)++;
// Terminate when we reach a value that does not have the high bit set
// (i.e. which was not modified when we mask it with 0x7f)
} while ((*(*data - 1)) != digit);
*b = bit;
return uleb;
}
static int64_t read_uleb128(unsigned char** data)
{
int b;
return read_leb128(data, &b);
}
static int64_t read_sleb128(unsigned char** data)
{
int bits;
// Read as if it's signed
uint64_t uleb = read_leb128(data, &bits);
// If the most significant bit read is 1, then we need to sign extend it
if (uleb >> (bits-1) == 1)
{
// Sign extend by setting all bits in front of it to 1
uleb |= ((int64_t)-1) << bits;
}
return (int64_t)uleb;
}
static uint64_t read_value(char encoding, unsigned char **data)
{
enum dwarf_data_encoding type = get_encoding(encoding);
uint64_t v;
switch (type)
{
// Read fixed-length types
#define READ(dwarf, type) \
case dwarf:\
v = (uint64_t)(*(type*)(*data));\
*data += sizeof(type);\
break;
READ(DW_EH_PE_udata2, uint16_t)
READ(DW_EH_PE_udata4, uint32_t)
READ(DW_EH_PE_udata8, uint64_t)
READ(DW_EH_PE_sdata2, int16_t)
READ(DW_EH_PE_sdata4, int32_t)
READ(DW_EH_PE_sdata8, int64_t)
case DW_EH_PE_absptr:
v = (uint64_t)(*(intptr_t*)(*data));
*data += sizeof(intptr_t);
break;
//READ(DW_EH_PE_absptr, intptr_t)
#undef READ
case DW_EH_PE_sleb128:
v = read_sleb128(data);
break;
case DW_EH_PE_uleb128:
v = read_uleb128(data);
break;
default: abort();
}
return v;
}
static uint64_t resolve_indirect_value(struct _Unwind_Context *c, unsigned char encoding, int64_t v, dw_eh_ptr_t start)
{
switch (get_base(encoding))
{
case DW_EH_PE_pcrel:
v += (uint64_t)(uintptr_t)start;
break;
case DW_EH_PE_textrel:
v += (uint64_t)(uintptr_t)_Unwind_GetTextRelBase(c);
break;
case DW_EH_PE_datarel:
v += (uint64_t)(uintptr_t)_Unwind_GetDataRelBase(c);
break;
case DW_EH_PE_funcrel:
v += (uint64_t)(uintptr_t)_Unwind_GetRegionStart(c);
default:
break;
}
// If this is an indirect value, then it is really the address of the real
// value
// TODO: Check whether this should really always be a pointer - it seems to
// be a GCC extensions, so not properly documented...
if (is_indirect(encoding))
{
v = (uint64_t)(uintptr_t)*(void**)(uintptr_t)v;
}
return v;
}
static inline void read_value_with_encoding(struct _Unwind_Context *context,
dw_eh_ptr_t *data,
uint64_t *out)
{
dw_eh_ptr_t start = *data;
unsigned char encoding = *((*data)++);
// If this value is omitted, skip it and don't touch the output value
if (encoding == DW_EH_PE_omit) { return; }
*out = read_value(encoding, data);
*out = resolve_indirect_value(context, encoding, *out, start);
}
struct dwarf_eh_lsda
{
dw_eh_ptr_t region_start;
dw_eh_ptr_t landing_pads;
dw_eh_ptr_t type_table;
unsigned char type_table_encoding;
dw_eh_ptr_t call_site_table;
dw_eh_ptr_t action_table;
unsigned char callsite_encoding;
};
static inline struct dwarf_eh_lsda parse_lsda(struct _Unwind_Context *context, unsigned char *data)
{
struct dwarf_eh_lsda lsda;
lsda.region_start = (dw_eh_ptr_t)(uintptr_t)_Unwind_GetRegionStart(context);
// If the landing pads are relative to anything other than the start of
// this region, find out where. This is @LPStart in the spec, although the
// encoding that GCC uses does not quite match the spec.
uint64_t v = (uint64_t)(uintptr_t)lsda.region_start;
read_value_with_encoding(context, &data, &v);
lsda.landing_pads = (dw_eh_ptr_t)(uintptr_t)v;
// If there is a type table, find out where it is. This is @TTBase in the
// spec. Note: we find whether there is a type table pointer by checking
// whether the leading byte is DW_EH_PE_omit (0xff), which is not what the
// spec says, but does seem to be how G++ indicates this.
lsda.type_table = 0;
lsda.type_table_encoding = *data++;
if (lsda.type_table_encoding != DW_EH_PE_omit)
{
v = read_uleb128(&data);
dw_eh_ptr_t type_table = data;
type_table += v;
lsda.type_table = type_table;
//lsda.type_table = (uintptr_t*)(data + v);
}
lsda.callsite_encoding = (enum dwarf_data_encoding)(*(data++));
// Action table is immediately after the call site table
lsda.action_table = data;
uintptr_t callsite_size = (uintptr_t)read_uleb128(&data);
lsda.action_table = data + callsite_size;
// Call site table is immediately after the header
lsda.call_site_table = (dw_eh_ptr_t)data;
return lsda;
}
struct dwarf_eh_action
{
dw_eh_ptr_t landing_pad;
dw_eh_ptr_t action_record;
};
/**
* Look up the landing pad that corresponds to the current invoke.
*/
static struct dwarf_eh_action
dwarf_eh_find_callsite(struct _Unwind_Context *context, struct dwarf_eh_lsda *lsda)
{
struct dwarf_eh_action result = { 0, 0};
uint64_t ip = _Unwind_GetIP(context) - _Unwind_GetRegionStart(context);
unsigned char *callsite_table = (unsigned char*)lsda->call_site_table;
while (callsite_table <= lsda->action_table)
{
// Once again, the layout deviates from the spec.
uint64_t call_site_start, call_site_size, landing_pad, action;
call_site_start = read_value(lsda->callsite_encoding, &callsite_table);
call_site_size = read_value(lsda->callsite_encoding, &callsite_table);
// Call site entries are started
if (call_site_start > ip) { break; }
landing_pad = read_value(lsda->callsite_encoding, &callsite_table);
action = read_uleb128(&callsite_table);
if (call_site_start <= ip && ip <= call_site_start + call_site_size)
{
if (action)
{
// Action records are 1-biased so both no-record and zeroth
// record can be stored.
result.action_record = lsda->action_table + action - 1;
}
// No landing pad means keep unwinding.
if (landing_pad)
{
// Landing pad is the offset from the value in the header
result.landing_pad = lsda->landing_pads + landing_pad;
}
break;
}
}
return result;
}

224
eh_personality.c
Unescape Escape View File

@ -0,0 +1,224 @@
#include <stdlib.h>
#include <dlfcn.h>
#include <stdio.h>
#include <string.h>
#include "dwarf_eh.h"
#include "objc/runtime.h"
#include "objc/hooks.h"
#include "class.h"
/**
* Class of exceptions to distinguish between this and other exception types.
*/
#define objc_exception_class (*(int64_t*)"GNUCC++\0")
/**
* Class used for C++ exceptions. Used to box them.
*/
#define cxx_exception_class (*(int64_t*)"GNUCC++\0")
/**
* Structure used as a header on thrown exceptions.
*/
struct objc_exception
{
/** The selector value to be returned when installing the catch handler.
* Used at the call site to determine which catch() block should execute.
* This is found in phase 1 of unwinding then installed in phase 2.*/
int handlerSwitchValue;
/** The cached landing pad for the catch handler.*/
void *landingPad;
/** The language-agnostic part of the exception header. */
struct _Unwind_Exception unwindHeader;
/** Thrown object. This is after the unwind header so that the C++
* exception handler can catch this as a foreign exception. */
id object;
};
/**
*
*/
void objc_exception_throw(id object)
{
struct objc_exception *ex = calloc(1, sizeof(struct objc_exception));
ex->unwindHeader.exception_class = objc_exception_class;
ex->object = object;
_Unwind_Reason_Code err = _Unwind_RaiseException(&ex->unwindHeader);
free(ex);
if (_URC_END_OF_STACK == err && 0 != _objc_unexpected_exception)
{
_objc_unexpected_exception(object);
}
abort();
}
Class get_type_table_entry(struct _Unwind_Context *context,
struct dwarf_eh_lsda *lsda,
int filter)
{
dw_eh_ptr_t record = lsda->type_table -
dwarf_size_of_fixed_size_field(lsda->type_table_encoding)*filter;
dw_eh_ptr_t start = record;
int64_t offset = read_value(lsda->type_table_encoding, &record);
if (0 == offset) { return Nil; }
// ...so we need to resolve it
char *class_name = (char*)(intptr_t)resolve_indirect_value(context,
lsda->type_table_encoding, offset, start);
if (0 == class_name) { return Nil; }
return (Class)objc_getClass(class_name);
}
static BOOL isKindOfClass(struct _Unwind_Exception *ex, Class type)
{
// Nil is a catchall, but we only want to catch things that are not foreign
// exceptions in it.
if (Nil == type)
{
return ex->exception_class == objc_exception_class;
}
if (ex->exception_class != objc_exception_class)
{
// FIXME: Box and stuff.
return NO;
}
id object = *(id*)(ex + 1);
do
{
if (object->isa == type)
{
return YES;
}
type = class_getSuperclass(type);
} while (Nil != type);
return NO;
}
static BOOL check_action_record(struct _Unwind_Context *context,
int64_t exceptionClass,
struct dwarf_eh_lsda *lsda,
dw_eh_ptr_t action_record,
struct _Unwind_Exception *ex,
unsigned long *selector)
{
while (action_record)
{
int filter = read_sleb128(&action_record);
dw_eh_ptr_t action_record_offset_base = action_record;
int displacement = read_sleb128(&action_record);
*selector = filter;
if (filter > 0)
{
Class type = get_type_table_entry(context, lsda, filter);
if (ex && isKindOfClass(ex, type))
{
return YES;
}
}
else if (filter == 0)
{
// Catchall
return YES;
}
*selector = 0;
action_record = displacement ?
action_record_offset_base + displacement : 0;
}
return NO;
}
/**
* The exception personality function.
*/
_Unwind_Reason_Code __gnu_objc_personality_v0(int version,
_Unwind_Action actions,
uint64_t exceptionClass,
struct _Unwind_Exception *exceptionObject,
struct _Unwind_Context *context)
{
// This personality function is for version 1 of the ABI. If you use it
// with a future version of the ABI, it won't know what to do, so it
// reports a fatal error and give up before it breaks anything.
if (1 != version)
{
return _URC_FATAL_PHASE1_ERROR;
}
struct objc_exception *ex = 0;
// Check if this is a foreign exception. If it is a C++ exception, then we
// have to box it. If it's something else, like a LanguageKit exception
// then we ignore it (for now)
BOOL foreignException = exceptionClass != objc_exception_class;
// If it's not a foreign exception, then we know the layout of the
// language-specific exception stuff.
if (!foreignException)
{
ex = (struct objc_exception*) ((char*)exceptionObject -
offsetof(struct objc_exception, unwindHeader));
}
unsigned char *lsda_addr = (void*)_Unwind_GetLanguageSpecificData(context);
// No LSDA implies no landing pads - try the next frame
if (0 == lsda_addr) { return _URC_CONTINUE_UNWIND; }
// These two variables define how the exception will be handled.
struct dwarf_eh_action action = {0};
unsigned long selector = 0;
if (actions & _UA_SEARCH_PHASE)
{
struct dwarf_eh_lsda lsda = parse_lsda(context, lsda_addr);
action = dwarf_eh_find_callsite(context, &lsda);
BOOL found_handler = check_action_record(context, exceptionClass, &lsda,
action.action_record, exceptionObject, &selector);
// If there's no action record, we've only found a cleanup, so keep
// searching for something real
if (found_handler)
{
// Cache the results for the phase 2 unwind, if we found a handler
// and this is not a foreign exception.
if (ex)
{
ex->handlerSwitchValue = selector;
ex->landingPad = action.landing_pad;
}
return _URC_HANDLER_FOUND;
}
return _URC_CONTINUE_UNWIND;
}
if (!(actions & _UA_HANDLER_FRAME) || foreignException)
{
struct dwarf_eh_lsda lsda = parse_lsda(context, lsda_addr);
action = dwarf_eh_find_callsite(context, &lsda);
if (0 == action.landing_pad) { return _URC_CONTINUE_UNWIND; }
selector = 0;
}
else
{
// Restore the saved info if we saved some last time.
action.landing_pad = ex->landingPad;
selector = ex->handlerSwitchValue;
}
_Unwind_SetIP(context, (unsigned long)action.landing_pad);
_Unwind_SetGR(context, __builtin_eh_return_data_regno(0),
(unsigned long)exceptionObject);
_Unwind_SetGR(context, __builtin_eh_return_data_regno(1), selector);
return _URC_INSTALL_CONTEXT;
}

498
exception.c
Unescape Escape View File

@ -1,498 +0,0 @@
/* The implementation of exception handling primitives for Objective-C.
Copyright (C) 2004, 2005, 2007, 2008, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#include <stdlib.h>
#include "objc/objc-api.h"
//#include <unwind.h>
#include "unwind-pe.h"
#ifdef __ARM_EABI_UNWINDER__
const _Unwind_Exception_Class __objc_exception_class
= {'G', 'N', 'U', 'C', 'O', 'B', 'J', 'C'};
#else
/* This is the exception class we report -- "GNUCOBJC". */
static const _Unwind_Exception_Class __objc_exception_class
= ((((((((_Unwind_Exception_Class) 'G'
<< 8 | (_Unwind_Exception_Class) 'N')
<< 8 | (_Unwind_Exception_Class) 'U')
<< 8 | (_Unwind_Exception_Class) 'C')
<< 8 | (_Unwind_Exception_Class) 'O')
<< 8 | (_Unwind_Exception_Class) 'B')
<< 8 | (_Unwind_Exception_Class) 'J')
<< 8 | (_Unwind_Exception_Class) 'C');
#endif
/* This is the object that is passed around by the Objective C runtime
to represent the exception in flight. */
struct ObjcException
{
/* This bit is needed in order to interact with the unwind runtime. */
struct _Unwind_Exception base;
/* The actual object we want to throw. Note: must come immediately after
unwind header. */
id value;
#ifdef __ARM_EABI_UNWINDER__
/* Note: we use the barrier cache defined in the unwind control block for
ARM EABI. */
#else
/* Cache some internal unwind data between phase 1 and phase 2. */
_Unwind_Ptr landingPad;
int handlerSwitchValue;
#endif
};
struct lsda_header_info
{
_Unwind_Ptr Start;
_Unwind_Ptr LPStart;
_Unwind_Ptr ttype_base;
const unsigned char *TType;
const unsigned char *action_table;
unsigned char ttype_encoding;
unsigned char call_site_encoding;
};
/* This hook allows libraries to sepecify special actions when an
exception is thrown without a handler in place.
*/
void (*_objc_unexpected_exception) (id exception); /* !T:SAFE */
static const unsigned char *
parse_lsda_header (struct _Unwind_Context *context, const unsigned char *p,
struct lsda_header_info *info)
{
_uleb128_t tmp;
unsigned char lpstart_encoding;
info->Start = (context ? _Unwind_GetRegionStart (context) : 0);
/* Find @LPStart, the base to which landing pad offsets are relative. */
lpstart_encoding = *p++;
if (lpstart_encoding != DW_EH_PE_omit)
p = read_encoded_value (context, lpstart_encoding, p, &info->LPStart);
else
info->LPStart = info->Start;
/* Find @TType, the base of the handler and exception spec type data. */
info->ttype_encoding = *p++;
if (info->ttype_encoding != DW_EH_PE_omit)
{
p = read_uleb128 (p, &tmp);
info->TType = p + tmp;
}
else
info->TType = 0;
/* The encoding and length of the call-site table; the action table
immediately follows. */
info->call_site_encoding = *p++;
p = read_uleb128 (p, &tmp);
info->action_table = p + tmp;
return p;
}
#ifdef __ARM_EABI_UNWINDER__
static Class
get_ttype_entry (struct lsda_header_info *info, _uleb128_t i)
{
_Unwind_Ptr ptr;
ptr = (_Unwind_Ptr) (info->TType - (i * 4));
ptr = _Unwind_decode_target2 (ptr);
if (ptr)
return objc_get_class ((const char *) ptr);
else
return 0;
}
#else
static Class
get_ttype_entry (struct lsda_header_info *info, _Unwind_Word i)
{
_Unwind_Ptr ptr;
i *= size_of_encoded_value (info->ttype_encoding);
read_encoded_value_with_base (info->ttype_encoding, info->ttype_base,
info->TType - i, &ptr);
/* NULL ptr means catch-all. */
if (ptr)
{
return objc_get_class ((const char *) ptr);
}
else
return 0;
}
#endif
/* Like unto the method of the same name on Object, but takes an id. */
/* ??? Does this bork the meta-type system? Can/should we look up an
isKindOf method on the id? */
static int
isKindOf (id value, Class target)
{
Class c;
/* NULL target is catch-all. */
if (target == 0)
return 1;
for (c = value->class_pointer; c; c = class_get_super_class (c))
if (c == target)
return 1;
return 0;
}
/* Using a different personality function name causes link failures
when trying to mix code using different exception handling models. */
#ifdef SJLJ_EXCEPTIONS
#define PERSONALITY_FUNCTION __gnu_objc_personality_sj0
#define __builtin_eh_return_data_regno(x) x
#else
#define PERSONALITY_FUNCTION __gnu_objc_personality_v0
#endif
#ifdef __ARM_EABI_UNWINDER__
#define CONTINUE_UNWINDING \
do \
{ \
if (__gnu_unwind_frame(ue_header, context) != _URC_OK) \
return _URC_FAILURE; \
return _URC_CONTINUE_UNWIND; \
} \
while (0)
_Unwind_Reason_Code
PERSONALITY_FUNCTION (_Unwind_State state,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
#else
#define CONTINUE_UNWINDING return _URC_CONTINUE_UNWIND
_Unwind_Reason_Code
PERSONALITY_FUNCTION (int version,
_Unwind_Action actions,
_Unwind_Exception_Class exception_class,
struct _Unwind_Exception *ue_header,
struct _Unwind_Context *context)
#endif
{
struct ObjcException *xh = (struct ObjcException *) ue_header;
struct lsda_header_info info;
const unsigned char *language_specific_data;
const unsigned char *action_record;
const unsigned char *p;
_Unwind_Ptr landing_pad, ip;
int handler_switch_value;
int saw_cleanup = 0, saw_handler, foreign_exception;
void *return_object;
int ip_before_insn = 0;
#ifdef __ARM_EABI_UNWINDER__
_Unwind_Action actions;
switch (state & _US_ACTION_MASK)
{
case _US_VIRTUAL_UNWIND_FRAME:
actions = _UA_SEARCH_PHASE;
break;
case _US_UNWIND_FRAME_STARTING:
actions = _UA_CLEANUP_PHASE;
if (!(state & _US_FORCE_UNWIND)
&& ue_header->barrier_cache.sp == _Unwind_GetGR (context, 13))
actions |= _UA_HANDLER_FRAME;
break;
case _US_UNWIND_FRAME_RESUME:
CONTINUE_UNWINDING;
break;
default:
abort();
}
actions |= state & _US_FORCE_UNWIND;
/* TODO: Foreign exceptions need some attention (e.g. rethrowing doesn't
work). */
foreign_exception = 0;
/* The dwarf unwinder assumes the context structure holds things like the
function and LSDA pointers. The ARM implementation caches these in
the exception header (UCB). To avoid rewriting everything we make the
virtual IP register point at the UCB. */
ip = (_Unwind_Ptr) ue_header;
_Unwind_SetGR (context, 12, ip);
#else /* !__ARM_EABI_UNWINDER. */
/* Interface version check. */
if (version != 1)
return _URC_FATAL_PHASE1_ERROR;
foreign_exception = (exception_class != __objc_exception_class);
#endif
/* Shortcut for phase 2 found handler for domestic exception. */
if (actions == (_UA_CLEANUP_PHASE | _UA_HANDLER_FRAME)
&& !foreign_exception)
{
#ifdef __ARM_EABI_UNWINDER__
handler_switch_value = (int) ue_header->barrier_cache.bitpattern[1];
landing_pad = (_Unwind_Ptr) ue_header->barrier_cache.bitpattern[3];
#else
handler_switch_value = xh->handlerSwitchValue;
landing_pad = xh->landingPad;
#endif
goto install_context;
}
language_specific_data = (const unsigned char *)
_Unwind_GetLanguageSpecificData (context);
/* If no LSDA, then there are no handlers or cleanups. */
if (! language_specific_data)
CONTINUE_UNWINDING;
/* Parse the LSDA header. */
p = parse_lsda_header (context, language_specific_data, &info);
info.ttype_base = base_of_encoded_value (info.ttype_encoding, context);
#ifdef HAVE_GETIPINFO
ip = _Unwind_GetIPInfo (context, &ip_before_insn);
#else
ip = _Unwind_GetIP (context);
#endif
if (!ip_before_insn)
--ip;
landing_pad = 0;
action_record = 0;
handler_switch_value = 0;
#ifdef SJLJ_EXCEPTIONS
/* The given "IP" is an index into the call-site table, with two
exceptions -- -1 means no-action, and 0 means terminate. But
since we're using uleb128 values, we've not got random access
to the array. */
if ((int) ip < 0)
return _URC_CONTINUE_UNWIND;
else
{
_uleb128_t cs_lp, cs_action;
do
{
p = read_uleb128 (p, &cs_lp);
p = read_uleb128 (p, &cs_action);
}
while (--ip);
/* Can never have null landing pad for sjlj -- that would have
been indicated by a -1 call site index. */
landing_pad = cs_lp + 1;
if (cs_action)
action_record = info.action_table + cs_action - 1;
goto found_something;
}
#else
/* Search the call-site table for the action associated with this IP. */
while (p < info.action_table)
{
_Unwind_Ptr cs_start, cs_len, cs_lp;
_uleb128_t cs_action;
/* Note that all call-site encodings are "absolute" displacements. */
p = read_encoded_value (0, info.call_site_encoding, p, &cs_start);
p = read_encoded_value (0, info.call_site_encoding, p, &cs_len);
p = read_encoded_value (0, info.call_site_encoding, p, &cs_lp);
p = read_uleb128 (p, &cs_action);
/* The table is sorted, so if we've passed the ip, stop. */
if (ip < info.Start + cs_start)
p = info.action_table;
else if (ip < info.Start + cs_start + cs_len)
{
if (cs_lp)
landing_pad = info.LPStart + cs_lp;
if (cs_action)
action_record = info.action_table + cs_action - 1;
goto found_something;
}
}
#endif /* SJLJ_EXCEPTIONS */
/* If ip is not present in the table, C++ would call terminate. */
/* ??? As with Java, it's perhaps better to tweek the LSDA to
that no-action is mapped to no-entry. */
CONTINUE_UNWINDING;
found_something:
saw_cleanup = 0;
saw_handler = 0;
if (landing_pad == 0)
{
/* If ip is present, and has a null landing pad, there are
no cleanups or handlers to be run. */
}
else if (action_record == 0)
{
/* If ip is present, has a non-null landing pad, and a null
action table offset, then there are only cleanups present.
Cleanups use a zero switch value, as set above. */
saw_cleanup = 1;
}
else
{
/* Otherwise we have a catch handler. */
_sleb128_t ar_filter, ar_disp;
while (1)
{
p = action_record;
p = read_sleb128 (p, &ar_filter);
read_sleb128 (p, &ar_disp);
if (ar_filter == 0)
{
/* Zero filter values are cleanups. */
saw_cleanup = 1;
}
/* During forced unwinding, we only run cleanups. With a
foreign exception class, we have no class info to match. */
else if ((actions & _UA_FORCE_UNWIND) || foreign_exception)
;
else if (ar_filter > 0)
{
/* Positive filter values are handlers. */
Class catch_type = get_ttype_entry (&info, ar_filter);
if (isKindOf (xh->value, catch_type))
{
handler_switch_value = ar_filter;
saw_handler = 1;
break;
}
}
else
{
/* Negative filter values are exception specifications,
which Objective-C does not use. */
abort ();
}
if (ar_disp == 0)
break;
action_record = p + ar_disp;
}
}
if (! saw_handler && ! saw_cleanup)
CONTINUE_UNWINDING;
if (actions & _UA_SEARCH_PHASE)
{
if (!saw_handler)
CONTINUE_UNWINDING;
/* For domestic exceptions, we cache data from phase 1 for phase 2. */
if (!foreign_exception)
{
#ifdef __ARM_EABI_UNWINDER__
ue_header->barrier_cache.sp = _Unwind_GetGR (context, 13);
ue_header->barrier_cache.bitpattern[1] = (_uw) handler_switch_value;
ue_header->barrier_cache.bitpattern[3] = (_uw) landing_pad;
#else
xh->handlerSwitchValue = handler_switch_value;
xh->landingPad = landing_pad;
#endif
}
return _URC_HANDLER_FOUND;
}
install_context:
if (saw_cleanup == 0)
{
return_object = xh->value;
if (!(actions & _UA_SEARCH_PHASE))
_Unwind_DeleteException(&xh->base);
}
_Unwind_SetGR (context, __builtin_eh_return_data_regno (0),
(intptr_t)(saw_cleanup ? xh : return_object));
_Unwind_SetGR (context, __builtin_eh_return_data_regno (1),
handler_switch_value);
_Unwind_SetIP (context, landing_pad);
return _URC_INSTALL_CONTEXT;
}
static void
__objc_exception_cleanup (_Unwind_Reason_Code code __attribute__((unused)),
struct _Unwind_Exception *exc)
{
free (exc);
}
void
objc_exception_throw (id value)
{
struct ObjcException *header = calloc (1, sizeof (*header));
memcpy (&header->base.exception_class, &__objc_exception_class,
sizeof (__objc_exception_class));
header->base.exception_cleanup =
(_Unwind_Exception_Cleanup_Fn)__objc_exception_cleanup;
header->value = value;
#ifdef SJLJ_EXCEPTIONS
_Unwind_SjLj_RaiseException (&header->base);
#else
_Unwind_RaiseException (&header->base);
#endif
/* Some sort of unwinding error. */
if (_objc_unexpected_exception != 0)
{
(*_objc_unexpected_exception) (value);
}
abort ();
}

51
objc/NXConstStr.h
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@ -1,51 +0,0 @@
/* Interface for the NXConstantString class for Objective-C.
Copyright (C) 1995, 2004, 2009 Free Software Foundation, Inc.
Contributed by Pieter J. Schoenmakers <tiggr@es.ele.tue.nl>
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __nxconstantstring_INCLUDE_GNU
#define __nxconstantstring_INCLUDE_GNU
#include "Object.h"
#ifdef __cplusplus
extern "C" {
#endif
@interface NXConstantString: Object
{
char *c_string;
unsigned int len;
}
-(const char *) cString;
-(unsigned int) length;
@end
#ifdef __cplusplus
}
#endif
#endif

125
objc/Object.h
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/* Interface for the Object class for Objective-C.
Copyright (C) 1993, 1994, 1995, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __object_INCLUDE_GNU
#define __object_INCLUDE_GNU
#include "objc.h"
#include "typedstream.h"
#ifdef __cplusplus
extern "C" {
#endif
/*
* All classes are derived from Object. As such,
* this is the overhead tacked onto those objects.
*/
@interface Object
{
Class isa; /* A pointer to the instance's class structure */
}
/* Initializing classes and instances */
+ initialize;
- init;
/* Creating, freeing, and copying instances */
+ new;
+ alloc;
- free;
- copy;
- shallowCopy;
- deepen;
- deepCopy;
/* Identifying classes */
- (Class)class;
- (Class)superClass;
- (MetaClass)metaClass;
- (const char *)name;
/* Identifying and comparing objects */
- self;
- (unsigned int)hash;
- (BOOL)isEqual:anObject;
- (int)compare:(id)anotherObject;
/* Testing object type */
- (BOOL)isMetaClass;
- (BOOL)isClass;
- (BOOL)isInstance;
/* Testing inheritance relationships */
- (BOOL)isKindOf:(Class)aClassObject;
- (BOOL)isMemberOf:(Class)aClassObject;
- (BOOL)isKindOfClassNamed:(const char *)aClassName;
- (BOOL)isMemberOfClassNamed:(const char *)aClassName;
/* Testing class functionality */
+ (BOOL)instancesRespondTo:(SEL)aSel;
- (BOOL)respondsTo:(SEL)aSel;
/* Testing protocol conformance */
- (BOOL)conformsTo:(Protocol*)aProtocol;
/* Introspection */
+ (IMP)instanceMethodFor:(SEL)aSel;
- (IMP)methodFor:(SEL)aSel;
+ (struct objc_method_description *)descriptionForInstanceMethod:(SEL)aSel;
- (struct objc_method_description *)descriptionForMethod:(SEL)aSel;
/* Sending messages determined at run time */
- perform:(SEL)aSel;
- perform:(SEL)aSel with:anObject;
- perform:(SEL)aSel with:anObject1 with:anObject2;
/* Forwarding */
- (retval_t)forward:(SEL)aSel :(arglist_t)argFrame;
- (retval_t)performv:(SEL)aSel :(arglist_t)argFrame;
/* Posing */
+ poseAs:(Class)aClassObject;
- (Class)transmuteClassTo:(Class)aClassObject;
/* Enforcing intentions */
- subclassResponsibility:(SEL)aSel;
- notImplemented:(SEL)aSel;
- shouldNotImplement:(SEL)aSel;
/* Error handling */
- doesNotRecognize:(SEL)aSel;
- error:(const char *)aString, ...;
/* Archiving */
+ (int)version;
+ setVersion:(int)aVersion;
@end
#ifdef __cplusplus
}
#endif
#endif

62
objc/Protocol.h
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@ -1,62 +0,0 @@
/* Declare the class Protocol for Objective C programs.
Copyright (C) 1993, 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __Protocol_INCLUDE_GNU
#define __Protocol_INCLUDE_GNU
#include "Object.h"
#ifdef __cplusplus
extern "C" {
#endif
@interface Protocol : Object
{
@protected
char *protocol_name;
struct objc_protocol_list *protocol_list;
struct objc_method_description_list *instance_methods, *class_methods;
}
/* Obtaining attributes intrinsic to the protocol */
- (const char *)name;
/* Testing protocol conformance */
- (BOOL) conformsTo: (Protocol *)aProtocolObject;
/* Looking up information specific to a protocol */
- (struct objc_method_description *) descriptionForInstanceMethod:(SEL)aSel;
- (struct objc_method_description *) descriptionForClassMethod:(SEL)aSel;
@end
#ifdef __cplusplus
}
#endif
#endif /* not __Protocol_INCLUDE_GNU */

107
objc/encoding.h
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@ -1,107 +0,0 @@
/* Encoding of types for Objective C.
Copyright (C) 1993, 1997, 2002, 2004, 2009 Free Software Foundation, Inc.
Author: Kresten Krab Thorup
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __encoding_INCLUDE_GNU
#define __encoding_INCLUDE_GNU
#include "objc-api.h"
#include "Availability.h"
#include <ctype.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define _C_CONST 'r'
#define _C_IN 'n'
#define _C_INOUT 'N'
#define _C_OUT 'o'
#define _C_BYCOPY 'O'
#define _C_BYREF 'R'
#define _C_ONEWAY 'V'
#define _C_GCINVISIBLE '!'
#define _F_CONST 0x01
#define _F_IN 0x01
#define _F_OUT 0x02
#define _F_INOUT 0x03
#define _F_BYCOPY 0x04
#define _F_BYREF 0x08
#define _F_ONEWAY 0x10
#define _F_GCINVISIBLE 0x20
int objc_aligned_size (const char *type) OBJC_DEPRECATED;
int objc_sizeof_type (const char *type) OBJC_DEPRECATED;
int objc_alignof_type (const char *type) OBJC_DEPRECATED;
int objc_aligned_size (const char *type) OBJC_DEPRECATED;
int objc_promoted_size (const char *type) OBJC_DEPRECATED;
const char *objc_skip_type_qualifiers (const char *type) OBJC_DEPRECATED;
const char *objc_skip_typespec (const char *type) OBJC_DEPRECATED;
const char *objc_skip_offset (const char *type) OBJC_DEPRECATED;
const char *objc_skip_argspec (const char *type) OBJC_DEPRECATED;
int method_get_number_of_arguments (struct objc_method *) OBJC_DEPRECATED;
int method_get_sizeof_arguments (struct objc_method *) OBJC_DEPRECATED;
char *method_get_first_argument (struct objc_method *,
arglist_t argframe,
const char **type) OBJC_DEPRECATED;
char *method_get_next_argument (arglist_t argframe,
const char **type) OBJC_DEPRECATED;
char *method_get_nth_argument (struct objc_method *m,
arglist_t argframe,
int arg,
const char **type) OBJC_DEPRECATED;
unsigned objc_get_type_qualifiers (const char *type) OBJC_DEPRECATED;
struct objc_struct_layout
{
const char *original_type;
const char *type;
const char *prev_type;
unsigned int record_size;
unsigned int record_align;
};
void objc_layout_structure (const char *type,
struct objc_struct_layout *layout) OBJC_DEPRECATED;
BOOL objc_layout_structure_next_member (struct objc_struct_layout *layout) OBJC_DEPRECATED;
void objc_layout_finish_structure (struct objc_struct_layout *layout,
unsigned int *size,
unsigned int *align) OBJC_DEPRECATED;
void objc_layout_structure_get_info (struct objc_struct_layout *layout,
unsigned int *offset,
unsigned int *align,
const char **type) OBJC_DEPRECATED;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __encoding_INCLUDE_GNU */

216
objc/hash.h
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@ -1,216 +0,0 @@
/* Hash tables for Objective C method dispatch.
Copyright (C) 1993, 1995, 1996, 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __hash_INCLUDE_GNU
#define __hash_INCLUDE_GNU
#include <stddef.h>
#include <string.h>
#include "objc.h"
#include "Availability.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/*
* This data structure is used to hold items
* stored in a hash table. Each node holds
* a key/value pair.
*
* Items in the cache are really of type void *.
*/
typedef struct cache_node
{
struct cache_node *next; /* Pointer to next entry on the list.
NULL indicates end of list. */
const void *key; /* Key used to locate the value. Used
to locate value when more than one
key computes the same hash
value. */
void *value; /* Value stored for the key. */
} *node_ptr;
/*
* This data type is the function that computes a hash code given a key.
* Therefore, the key can be a pointer to anything and the function specific
* to the key type.
*
* Unfortunately there is a mutual data structure reference problem with this
* typedef. Therefore, to remove compiler warnings the functions passed to
* objc_hash_new will have to be casted to this type.
*/
typedef unsigned int (*hash_func_type) (void *, const void *);
/*
* This data type is the function that compares two hash keys and returns an
* integer greater than, equal to, or less than 0, according as the first
* parameter is lexicographically greater than, equal to, or less than the
* second.
*/
typedef int (*compare_func_type) (const void *, const void *);
/*
* This data structure is the cache.
*
* It must be passed to all of the hashing routines
* (except for new).
*/
typedef struct cache
{
/* Variables used to implement the hash itself. */
node_ptr *node_table; /* Pointer to an array of hash nodes. */
/* Variables used to track the size of the hash table so to determine
when to resize it. */
unsigned int size; /* Number of buckets allocated for the hash table
(number of array entries allocated for
"node_table"). Must be a power of two. */
unsigned int used; /* Current number of entries in the hash table. */
unsigned int mask; /* Precomputed mask. */
/* Variables used to implement indexing through the hash table. */
unsigned int last_bucket; /* Tracks which entry in the array where
the last value was returned. */
/* Function used to compute a hash code given a key.
This function is specified when the hash table is created. */
hash_func_type hash_func;
/* Function used to compare two hash keys to see if they are equal. */
compare_func_type compare_func;
} *cache_ptr;
/* Two important hash tables. */
extern cache_ptr module_hash_table, class_hash_table;
/* Allocate and initialize a hash table. */
cache_ptr objc_hash_new (unsigned int size,
hash_func_type hash_func,
compare_func_type compare_func) OBJC_DEPRECATED;
/* Deallocate all of the hash nodes and the cache itself. */
void objc_hash_delete (cache_ptr cache) OBJC_DEPRECATED;
/* Add the key/value pair to the hash table. If the
hash table reaches a level of fullness then it will be resized.
assert if the key is already in the hash. */
void objc_hash_add (cache_ptr *cachep, const void *key, void *value) OBJC_DEPRECATED;
/* Remove the key/value pair from the hash table.
assert if the key isn't in the table. */
void objc_hash_remove (cache_ptr cache, const void *key) OBJC_DEPRECATED;
/* Used to index through the hash table. Start with NULL
to get the first entry.
Successive calls pass the value returned previously.
** Don't modify the hash during this operation ***
Cache nodes are returned such that key or value can
be extracted. */
node_ptr objc_hash_next (cache_ptr cache, node_ptr node) OBJC_DEPRECATED;
/* Used to return a value from a hash table using a given key. */
void *objc_hash_value_for_key (cache_ptr cache, const void *key) OBJC_DEPRECATED;
/* Used to determine if the given key exists in the hash table */
BOOL objc_hash_is_key_in_hash (cache_ptr cache, const void *key) OBJC_DEPRECATED;
/************************************************
Useful hashing functions.
Declared inline for your pleasure.
************************************************/
/* Calculate a hash code by performing some
manipulation of the key pointer. (Use the lowest bits
except for those likely to be 0 due to alignment.) */
static inline unsigned int
objc_hash_ptr (cache_ptr cache, const void *key)
{
return ((size_t)key / sizeof (void *)) & cache->mask;
}
/* Calculate a hash code by iterating over a NULL
terminate string. */
static inline unsigned int
objc_hash_string (cache_ptr cache, const void *key)
{
unsigned int ret = 0;
unsigned int ctr = 0;
const char *ckey = (const char *) key;
while (*ckey) {
ret ^= *ckey++ << ctr;
ctr = (ctr + 1) % sizeof (void *);
}
return ret & cache->mask;
}
/* Compare two pointers for equality. */
static inline int
objc_compare_ptrs (const void *k1, const void *k2)
{
return (k1 == k2);
}
/* Compare two strings. */
static inline int
objc_compare_strings (const void *k1, const void *k2)
{
if (k1 == k2)
return 1;
else if (k1 == 0 || k2 == 0)
return 0;
else
return ! strcmp ((const char *) k1, (const char *) k2);
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __hash_INCLUDE_GNU */

6
objc/hooks.h
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@ -38,3 +38,9 @@ OBJC_HOOK struct objc_slot *(*__objc_msg_forward3)(id, SEL);
* handles the forwarding. * handles the forwarding.
*/ */
OBJC_HOOK IMP (*__objc_msg_forward2)(id, SEL); OBJC_HOOK IMP (*__objc_msg_forward2)(id, SEL);
/**
* Hook defined for handling unhandled exceptions. If the unwind library
* reaches the end of the stack without finding a handler then this hook is
* called.
*/
OBJC_HOOK void (*_objc_unexpected_exception)(id exception);

662
objc/objc-api.h
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@ -1,662 +0,0 @@
/* GNU Objective-C Runtime API.
Copyright (C) 1993, 1995, 1996, 1997, 2001, 2002, 2003, 2004, 2005,
2007, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __objc_api_INCLUDE_GNU
#define __objc_api_INCLUDE_GNU
#include "objc.h"
#include "hash.h"
#include "thr.h"
#include "objc-decls.h"
#include "Availability.h"
#include <stdio.h>
#include <stdarg.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/* For functions which return Method_t */
#define METHOD_NULL (Method_t)0
/* Boolean typedefs */
/* Method descriptor returned by introspective Object methods.
This is really just the first part of the more complete objc_method
structure defined below and used internally by the runtime. */
struct objc_method_description
{
SEL name; /* this is a selector, not a string */
char *types; /* type encoding */
};
/* Filer types used to describe Ivars and Methods. */
#define _C_ID '@'
#define _C_CLASS '#'
#define _C_SEL ':'
#define _C_CHR 'c'
#define _C_UCHR 'C'
#define _C_SHT 's'
#define _C_USHT 'S'
#define _C_INT 'i'
#define _C_UINT 'I'
#define _C_LNG 'l'
#define _C_ULNG 'L'
#define _C_LNG_LNG 'q'
#define _C_ULNG_LNG 'Q'
#define _C_FLT 'f'
#define _C_DBL 'd'
#define _C_BFLD 'b'
#define _C_BOOL 'B'
#define _C_VOID 'v'
#define _C_UNDEF '?'
#define _C_PTR '^'
#define _C_CHARPTR '*'
#define _C_ATOM '%'
#define _C_ARY_B '['
#define _C_ARY_E ']'
#define _C_UNION_B '('
#define _C_UNION_E ')'
#define _C_STRUCT_B '{'
#define _C_STRUCT_E '}'
#define _C_VECTOR '!'
#define _C_COMPLEX 'j'
/* Error handling
Call objc_error() or objc_verror() to record an error; this error
routine will generally exit the program but not necessarily if the
user has installed his own error handler.
Call objc_set_error_handler to assign your own function for
handling errors. The function should return YES if it is ok
to continue execution, or return NO or just abort if the
program should be stopped. The default error handler is just to
print a message on stderr.
The error handler function should be of type objc_error_handler
The first parameter is an object instance of relevance.
The second parameter is an error code.
The third parameter is a format string in the printf style.
The fourth parameter is a variable list of arguments. */
extern void objc_error(id object, int code, const char* fmt, ...) OBJC_DEPRECATED;
extern void objc_verror(id object, int code, const char* fmt, va_list ap) OBJC_DEPRECATED;
typedef BOOL (*objc_error_handler)(id, int code, const char *fmt, va_list ap) OBJC_DEPRECATED;
extern objc_error_handler objc_set_error_handler(objc_error_handler func) OBJC_DEPRECATED;
/* Error codes
These are used by the runtime library, and your
error handling may use them to determine if the error is
hard or soft thus whether execution can continue or abort. */
#define OBJC_ERR_UNKNOWN 0 /* Generic error */
#define OBJC_ERR_OBJC_VERSION 1 /* Incorrect runtime version */
#define OBJC_ERR_GCC_VERSION 2 /* Incorrect compiler version */
#define OBJC_ERR_MODULE_SIZE 3 /* Bad module size */
#define OBJC_ERR_PROTOCOL_VERSION 4 /* Incorrect protocol version */
#define OBJC_ERR_MEMORY 10 /* Out of memory */
#define OBJC_ERR_RECURSE_ROOT 20 /* Attempt to archive the root
object more than once. */
#define OBJC_ERR_BAD_DATA 21 /* Didn't read expected data */
#define OBJC_ERR_BAD_KEY 22 /* Bad key for object */
#define OBJC_ERR_BAD_CLASS 23 /* Unknown class */
#define OBJC_ERR_BAD_TYPE 24 /* Bad type specification */
#define OBJC_ERR_NO_READ 25 /* Cannot read stream */
#define OBJC_ERR_NO_WRITE 26 /* Cannot write stream */
#define OBJC_ERR_STREAM_VERSION 27 /* Incorrect stream version */
#define OBJC_ERR_BAD_OPCODE 28 /* Bad opcode */
#define OBJC_ERR_UNIMPLEMENTED 30 /* Method is not implemented */
#define OBJC_ERR_BAD_STATE 40 /* Bad thread state */
/* Set this variable nonzero to print a line describing each
message that is sent. (this is currently disabled) */
extern BOOL objc_trace;
/* For every class which happens to have statically allocated instances in
this module, one OBJC_STATIC_INSTANCES is allocated by the compiler.
INSTANCES is NULL terminated and points to all statically allocated
instances of this class. */
struct objc_static_instances
{
char *class_name;
#ifdef __cplusplus
id instances[1];
#else
id instances[0];
#endif
};
/* Whereas a Module (defined further down) is the root (typically) of a file,
a Symtab is the root of the class and category definitions within the
module.
A Symtab contains a variable length array of pointers to classes and
categories defined in the module. */
typedef struct objc_symtab {
unsigned long sel_ref_cnt; /* Unknown. */
SEL refs; /* Unknown. */
unsigned short cls_def_cnt; /* Number of classes compiled
(defined) in the module. */
unsigned short cat_def_cnt; /* Number of categories
compiled (defined) in the
module. */
void *defs[1]; /* Variable array of pointers.
cls_def_cnt of type Class
followed by cat_def_cnt of
type Category_t, followed
by a NULL terminated array
of objc_static_instances. */
} Symtab, *Symtab_t;
/*
** The compiler generates one of these structures for each module that
** composes the executable (eg main.m).
**
** This data structure is the root of the definition tree for the module.
**
** A collect program runs between ld stages and creates a ObjC ctor array.
** That array holds a pointer to each module structure of the executable.
*/
typedef struct objc_module {
unsigned long version; /* Compiler revision. */
unsigned long size; /* sizeof(Module). */
const char* name; /* Name of the file where the
module was generated. The
name includes the path. */
Symtab_t symtab; /* Pointer to the Symtab of
the module. The Symtab
holds an array of
pointers to
the classes and categories
defined in the module. */
} Module, *Module_t;
/*
** The compiler generates one of these structures for a class that has
** instance variables defined in its specification.
*/
typedef struct objc_ivar {
const char* ivar_name; /* Name of the instance
variable as entered in the
class definition. */
const char* ivar_type; /* Description of the Ivar's
type. Useful for
debuggers. */
int ivar_offset; /* Byte offset from the base
address of the instance
structure to the variable. */
} *Ivar_t;
typedef struct objc_ivar_list {
int ivar_count; /* Number of structures (Ivar)
contained in the list. One
structure per instance
variable defined in the
class. */
struct objc_ivar ivar_list[1]; /* Variable length
structure. */
} IvarList, *IvarList_t;
/*
** The compiler generates one (or more) of these structures for a class that
** has methods defined in its specification.
**
** The implementation of a class can be broken into separate pieces in a file
** and categories can break them across modules. To handle this problem is a
** singly linked list of methods.
*/
typedef struct objc_method {
SEL method_name; /* The selector used to identify
the method. The types for this
selector should match the next
field. */
const char* method_types; /* Description of the method's
parameter list. Useful for
debuggers. */
IMP method_imp; /* Address of the method in the
executable. */
} Method, *Method_t;
typedef struct objc_method_list {
struct objc_method_list* method_next; /* This variable is used to link
a method list to another. It
is a singly linked list. */
int method_count; /* Number of methods defined in
this structure. */
Method method_list[1]; /* Variable length
structure. */
} MethodList, *MethodList_t;
struct objc_protocol_list {
struct objc_protocol_list *next;
size_t count;
Protocol *list[1];
};
/*
** This is used to assure consistent access to the info field of
** classes
*/
#ifndef HOST_BITS_PER_LONG
#define HOST_BITS_PER_LONG (sizeof(long)*8)
#endif
#define __CLS_INFO(cls) ((cls)->info)
#define __CLS_ISINFO(cls, mask) ((__CLS_INFO(cls)&mask)==mask)
#define __CLS_SETINFO(cls, mask) (__CLS_INFO(cls) |= mask)
/* The structure is of type MetaClass */
#define _CLS_META 0x2L
#define CLS_ISMETA(cls) ((cls)&&__CLS_ISINFO(cls, _CLS_META))
/* The structure is of type Class */
#define _CLS_CLASS 0x1L
#define CLS_ISCLASS(cls) ((cls)&&__CLS_ISINFO(cls, _CLS_CLASS))
/*
** The class is initialized within the runtime. This means that
** it has had correct super and sublinks assigned
*/
#define _CLS_RESOLV 0x8L
#define CLS_ISRESOLV(cls) __CLS_ISINFO(cls, _CLS_RESOLV)
#define CLS_SETRESOLV(cls) __CLS_SETINFO(cls, _CLS_RESOLV)
/*
** The class has been send a +initialize message or a such is not
** defined for this class
*/
#define _CLS_INITIALIZED 0x04L
#define CLS_ISINITIALIZED(cls) __CLS_ISINFO(cls, _CLS_INITIALIZED)
#define CLS_SETINITIALIZED(cls) __CLS_SETINFO(cls, _CLS_INITIALIZED)
/*
** The class uses the new, Objective-C 2, runtime ABI. This ABI defines an ABI
** version field inside the class, and so will be used for all subsequent
** versions that retain some degree of compatibility.
*/
#define _CLS_NEW_ABI 0x10L
#define CLS_ISNEW_ABI(cls) __CLS_ISINFO(cls, _CLS_NEW_ABI)
#define CLS_SETNEW_ABI(cls) __CLS_SETINFO(cls, _CLS_NEW_ABI)
/*
** The class was created at runtime and exists in heap-backed memory.
*/
#define _CLS_RUNTIME 0x20L
#define CLS_ISRUNTIME(cls) __CLS_ISINFO(cls, _CLS_RUNTIME)
#define CLS_SETRUNTIME(cls) __CLS_SETINFO(cls, _CLS_RUNTIME)
/*
** Instances of this class have a reference count and plane ID prepended to
** them. The default for this is set for classes, unset for metaclasses. It
** should be cleared by protocols, constant strings, and objects not allocated
** by NSAllocateObject().
*/
#define _CLS_PLANE_AWARE 0x40L
#define CLS_ISPLANE_AWARE(cls) __CLS_ISINFO(cls, _CLS_PLANE_AWARE)
#define CLS_SETPLANE_AWARE(cls) __CLS_SETINFO(cls, _CLS_PLANE_AWARE)
/*
** The class number of this class. This must be the same for both the
** class and its meta class object
*/
#define CLS_GETNUMBER(cls) (__CLS_INFO(cls) >> (HOST_BITS_PER_LONG/2))
#define CLS_SETNUMBER(cls, num) \
({ (cls)->info <<= (HOST_BITS_PER_LONG/2); \
(cls)->info >>= (HOST_BITS_PER_LONG/2); \
__CLS_SETINFO(cls, (((unsigned long)num) << (HOST_BITS_PER_LONG/2))); })
/*
** The compiler generates one of these structures for each category. A class
** may have many categories and contain both instance and factory methods.
*/
typedef struct objc_category {
const char* category_name; /* Name of the category. Name
contained in the () of the
category definition. */
const char* class_name; /* Name of the class to which
the category belongs. */
MethodList_t instance_methods; /* Linked list of instance
methods defined in the
category. NULL indicates no
instance methods defined. */
MethodList_t class_methods; /* Linked list of factory
methods defined in the
category. NULL indicates no
class methods defined. */
struct objc_protocol_list *protocols; /* List of Protocols
conformed to */
} Category, *Category_t;
/*
** Structure used when a message is send to a class's super class. The
** compiler generates one of these structures and passes it to
** objc_msg_super.
*/
typedef struct objc_super {
id self; /* Id of the object sending
the message. */
#ifdef __cplusplus
Class super_class;
#else
Class class; /* Object's super class. */
#endif
} Super, *Super_t;
IMP objc_msg_lookup_super(Super_t super, SEL sel);
retval_t objc_msg_sendv(id, SEL, arglist_t);
/*
** This is a hook which is called by objc_lookup_class and
** objc_get_class if the runtime is not able to find the class.
** This may e.g. try to load in the class using dynamic loading.
** The function is guaranteed to be passed a non-NULL name string.
*/
objc_EXPORT Class (*_objc_lookup_class)(const char *name);
/*
** This is a hook which is called by __objc_exec_class every time a class
** or a category is loaded into the runtime. This may e.g. help a
** dynamic loader determine the classes that have been loaded when
** an object file is dynamically linked in.
*/
objc_EXPORT void (*_objc_load_callback)(Class _class, Category* category);
/*
** Hook functions for allocating, copying and disposing of instances
*/
objc_EXPORT id (*_objc_object_alloc)(Class _class);
objc_EXPORT id (*_objc_object_copy)(id object);
objc_EXPORT id (*_objc_object_dispose)(id object);
/*
** Standard functions for memory allocation and disposal.
** Users should use these functions in their ObjC programs so
** that they work properly with garbage collectors as well as
** can take advantage of the exception/error handling available.
*/
void *
objc_malloc(size_t size);
void *
objc_atomic_malloc(size_t size);
void *
objc_valloc(size_t size);
void *
objc_realloc(void *mem, size_t size);
void *
objc_calloc(size_t nelem, size_t size);
void
objc_free(void *mem);
/*
** Hook functions for memory allocation and disposal.
** This makes it easy to substitute garbage collection systems
** such as Boehm's GC by assigning these function pointers
** to the GC's allocation routines. By default these point
** to the ANSI standard malloc, realloc, free, etc.
**
** Users should call the normal objc routines above for
** memory allocation and disposal within their programs.
*/
objc_EXPORT void *(*_objc_malloc)(size_t);
objc_EXPORT void *(*_objc_atomic_malloc)(size_t);
objc_EXPORT void *(*_objc_valloc)(size_t);
objc_EXPORT void *(*_objc_realloc)(void *, size_t);
objc_EXPORT void *(*_objc_calloc)(size_t, size_t);
objc_EXPORT void (*_objc_free)(void *);
/*
** Hooks for method forwarding. This makes it easy to substitute a
** library, such as ffcall, that implements closures, thereby avoiding
** gcc's __builtin_apply problems. __objc_msg_forward2's result will
** be preferred over that of __objc_msg_forward if both are set and
** return non-NULL.
*/
objc_EXPORT IMP (*__objc_msg_forward)(SEL);
objc_EXPORT IMP (*__objc_msg_forward2)(id, SEL);
/*
** Hook for uncaught exceptions. This hook is called when an exception
** is thrown and no valid exception handler is in place. The function
** is expected never to return. If the function returns the result is
** currently undefined.
*/
objc_EXPORT void (*_objc_unexpected_exception)(id);
Method_t class_get_class_method(MetaClass _class, SEL aSel) OBJC_DEPRECATED;
Method_t class_get_instance_method(Class _class, SEL aSel) OBJC_DEPRECATED;
Class class_pose_as(Class impostor, Class superclass) OBJC_DEPRECATED;
Class objc_get_class(const char *name) OBJC_DEPRECATED;
Class objc_lookup_class(const char *name) OBJC_DEPRECATED;
Class objc_next_class(void **enum_state) OBJC_DEPRECATED;
const char *sel_get_name(SEL selector) OBJC_DEPRECATED;
const char *sel_get_type(SEL selector) OBJC_DEPRECATED;
SEL sel_get_uid(const char *name) OBJC_DEPRECATED;
SEL sel_get_any_uid(const char *name) OBJC_DEPRECATED;
SEL sel_get_any_typed_uid(const char *name) OBJC_DEPRECATED;
SEL sel_get_typed_uid(const char *name, const char*) OBJC_DEPRECATED;
SEL sel_register_name(const char *name) OBJC_DEPRECATED;
SEL sel_register_typed_name(const char *name, const char*type) OBJC_DEPRECATED;
BOOL sel_is_mapped (SEL aSel) OBJC_DEPRECATED;
extern id class_create_instance(Class _class) OBJC_DEPRECATED;
static inline const char *
class_get_class_name(Class _class)
{
return CLS_ISCLASS(_class)?_class->name:((_class==Nil)?"Nil":0);
}
static inline long
class_get_instance_size(Class _class)
{
return CLS_ISCLASS(_class)?_class->instance_size:0;
}
static inline MetaClass
class_get_meta_class(Class _class)
{
return CLS_ISCLASS(_class)?_class->class_pointer:Nil;
}
static inline Class
class_get_super_class(Class _class)
{
if (!CLS_ISRESOLV(_class))
{
/* This class is not yet resolved ... so lookup superclass by name.
* We need to allow for this case because we might doing a lookup in
* a class which has not yet been registered with the runtime and
* which might have ivars or methods added after this call (so we
* mustn't resolve this class now).
*/
if (NULL == _class->super_class) { return NULL; }
return (Class)objc_get_class((const char*)_class->super_class);
}
return _class->super_class;
}
static inline int
class_get_version(Class _class)
{
return CLS_ISCLASS(_class)?_class->version:-1;
}
static inline BOOL
class_is_class(Class _class)
{
return CLS_ISCLASS(_class);
}
static inline BOOL
class_is_meta_class(Class _class)
{
return CLS_ISMETA(_class);
}
static inline void
class_set_version(Class _class, long version)
{
if (CLS_ISCLASS(_class))
_class->version = version;
}
static inline void *
class_get_gc_object_type (Class _class)
{
return CLS_ISCLASS(_class) ? _class->gc_object_type : NULL;
}
/* Mark the instance variable as innaccessible to the garbage collector */
extern void class_ivar_set_gcinvisible (Class _class,
const char* ivarname,
BOOL gcInvisible);
static inline IMP
method_get_imp(Method_t method)
{
return (method!=METHOD_NULL)?method->method_imp:(IMP)0;
}
IMP get_imp (Class _class, SEL sel);
/* Redefine on NeXTSTEP so as not to conflict with system function */
#ifdef __NeXT__
#define object_copy gnu_object_copy
#define object_dispose gnu_object_dispose
#endif
id object_copy(id object);
id object_dispose(id object);
static inline Class
object_get_class(id object)
{
return ((object!=nil)
? (CLS_ISCLASS(object->class_pointer)
? object->class_pointer
: (CLS_ISMETA(object->class_pointer)
? (Class)object
: Nil))
: Nil);
}
static inline const char *
object_get_class_name(id object)
{
return ((object!=nil)?(CLS_ISCLASS(object->class_pointer)
?object->class_pointer->name
:((Class)object)->name)
:"Nil");
}
static inline MetaClass
object_get_meta_class(id object)
{
return ((object!=nil)?(CLS_ISCLASS(object->class_pointer)
?object->class_pointer->class_pointer
:(CLS_ISMETA(object->class_pointer)
?object->class_pointer
:Nil))
:Nil);
}
static inline Class
object_get_super_class
(id object)
{
return ((object!=nil)?(CLS_ISCLASS(object->class_pointer)
?object->class_pointer->super_class
:(CLS_ISMETA(object->class_pointer)
?((Class)object)->super_class
:Nil))
:Nil);
}
static inline BOOL
object_is_class (id object)
{
return ((object != nil) && CLS_ISMETA (object->class_pointer));
}
static inline BOOL
object_is_instance (id object)
{
return ((object != nil) && CLS_ISCLASS (object->class_pointer));
}
static inline BOOL
object_is_meta_class (id object)
{
return ((object != nil)
&& !object_is_instance (object)
&& !object_is_class (object));
}
struct sarray*
objc_get_uninstalled_dtable(void);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __objc_api_INCLUDE_GNU */

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/* GNU Objective-C Extern helpers for Win32.
Copyright (C) 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __objc_decls_INCLUDE_GNU
#define __objc_decls_INCLUDE_GNU
#if defined (_WIN32) || defined (__WIN32__) || defined (WIN32)
# ifdef DLL_EXPORT /* defined by libtool (if required) */
# define objc_EXPORT __declspec(dllexport)
# define objc_DECLARE __declspec(dllexport)
#else
# define objc_EXPORT extern __declspec(dllimport)
# define objc_DECLARE extern __declspec(dllimport)
#endif
#else
# define objc_EXPORT extern
# define objc_DECLARE
#endif
#endif /* __objc_decls_INCLUDE_GNU */

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objc/objc-list.h
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/* Generic single linked list to keep various information
Copyright (C) 1993, 1994, 1996, 2009 Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __GNU_OBJC_LIST_H
#define __GNU_OBJC_LIST_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
struct objc_list {
void *head;
struct objc_list *tail;
};
/* Return a cons cell produced from (head . tail) */
static inline struct objc_list*
list_cons(void* head, struct objc_list* tail)
{
struct objc_list* cell;
cell = (struct objc_list*)objc_malloc(sizeof(struct objc_list));
cell->head = head;
cell->tail = tail;
return cell;
}
/* Return the length of a list, list_length(NULL) returns zero */
static inline int
list_length(struct objc_list* list)
{
int i = 0;
while(list)
{
i += 1;
list = list->tail;
}
return i;
}
/* Return the Nth element of LIST, where N count from zero. If N
larger than the list length, NULL is returned */
static inline void*
list_nth(int indx, struct objc_list* list)
{
while(indx-- != 0)
{
if(list->tail)
list = list->tail;
else
return 0;
}
return list->head;
}
/* Remove the element at the head by replacing it by its successor */
static inline void
list_remove_head(struct objc_list** list)
{
if ((*list)->tail)
{
struct objc_list* tail = (*list)->tail; /* fetch next */
*(*list) = *tail; /* copy next to list head */
objc_free(tail); /* free next */
}
else /* only one element in list */
{
objc_free(*list);
(*list) = 0;
}
}
/* Remove the element with `car' set to ELEMENT */
static inline void
list_remove_elem(struct objc_list** list, void* elem)
{
while (*list) {
if ((*list)->head == elem)
list_remove_head(list);
list = &((*list)->tail);
}
}
/* Map FUNCTION over all elements in LIST */
static inline void
list_mapcar(struct objc_list* list, void(*function)(void*))
{
while(list)
{
(*function)(list->head);
list = list->tail;
}
}
/* Return element that has ELEM as car */
static inline struct objc_list**
list_find(struct objc_list** list, void* elem)
{
while(*list)
{
if ((*list)->head == elem)
return list;
list = &((*list)->tail);
}
return NULL;
}
/* Free list (backwards recursive) */
static inline void
list_free(struct objc_list* list)
{
if(list)
{
list_free(list->tail);
objc_free(list);
}
}
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __GNU_OBJC_LIST_H */

209
objc/objc.h
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/* Basic data types for Objective C.
Copyright (C) 1993, 1995, 1996, 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __objc_INCLUDE_GNU
#define __objc_INCLUDE_GNU
#ifdef __cplusplus
extern "C" {
#endif
#include <stddef.h>
/*
** Definition of the boolean type.
*/
#ifdef __vxworks
typedef int BOOL;
#else
typedef unsigned char BOOL;
#endif
#define YES (BOOL)1
#define NO (BOOL)0
/*
** Definition of a selector. Selectors themselves are not unique, but
** the sel_id is a unique identifier.
*/
typedef const struct objc_selector
{
void *sel_id;
const char *sel_types;
} *SEL;
inline static BOOL
sel_eq (SEL s1, SEL s2)
{
if (s1 == 0 || s2 == 0)
return s1 == s2;
else
return s1->sel_id == s2->sel_id;
}
/*
** ObjC uses this typedef for untyped instances.
*/
typedef struct objc_object {
struct objc_class* class_pointer;
} *id;
/*
** Definition of method type. When retrieving the implementation of a
** method, this is type of the pointer returned. The idea of the
** definition of IMP is to represent a 'pointer to a general function
** taking an id, a SEL, followed by other unspecified arguments'. You
** must always cast an IMP to a pointer to a function taking the
** appropriate, specific types for that function, before calling it -
** to make sure the appropriate arguments are passed to it. The code
** generated by the compiler to perform method calls automatically
** does this cast inside method calls.
*/
typedef id (*IMP)(id, SEL, ...);
/*
** More simple types...
*/
#define nil (id)0 /* id of Nil instance */
#define Nil (Class)0 /* id of Nil class */
typedef char *STR; /* String alias */
/*
** The compiler generates one of these structures for each class.
**
** This structure is the definition for classes.
**
** This structure is generated by the compiler in the executable and used by
** the run-time during normal messaging operations. Therefore some members
** change type. The compiler generates "char* const" and places a string in
** the following member variables: super_class.
*/
typedef struct objc_class *MetaClass;
typedef struct objc_class *Class;
struct objc_class {
MetaClass class_pointer; /* Pointer to the class's
meta class. */
struct objc_class* super_class; /* Pointer to the super
class. NULL for class
Object. */
const char* name; /* Name of the class. */
long version; /* Unknown. */
unsigned long info; /* Bit mask. See class masks
defined above. */
long instance_size; /* Size in bytes of the class.
The sum of the class
definition and all super
class definitions. */
struct objc_ivar_list* ivars; /* Pointer to a structure that
describes the instance
variables in the class
definition. NULL indicates
no instance variables. Does
not include super class
variables. */
struct objc_method_list* methods; /* Linked list of instance
methods defined for the
class. */
struct sarray * dtable; /* Pointer to instance
method dispatch table. */
struct objc_class* subclass_list; /* Subclasses */
struct objc_class* sibling_class;
struct objc_protocol_list *protocols; /* Protocols conformed to */
void* gc_object_type;
/**
* New ABI. The following fields are only available with classes compiled to
* support the new ABI. You may test whether any given class supports this
* ABI by using the CLS_ISNEW_ABI() macro.
*/
/**
* The version of the ABI used for this class. This is currently always zero.
*/
long abi_version;
/**
* Array of pointers to variables where the runtime will store the ivar
* offset. These may be used for faster access to non-fragile ivars if all
* of the code is compiled for the new ABI. Each of these pointers should
* have the mangled name __objc_ivar_offset_value_{class name}.{ivar name}
*
* When using the compatible non-fragile ABI, this faster form should only be
* used for classes declared in the same compilation unit.
*
* The compiler should also emit symbols of the form
* __objc_ivar_offset_{class name}.{ivar name} which are pointers to the
* offset values. These should be emitted as weak symbols in every module
* where they are used. The legacy-compatible ABI uses these with a double
* layer of indirection.
*/
int **ivar_offsets;
/**
* List of declared properties on this class (NULL if none). This contains
* the accessor methods for each property.
*/
struct objc_property_list *properties;
};
#ifndef __OBJC__
typedef struct objc_protocol {
struct objc_class* class_pointer;
char *protocol_name;
struct objc_protocol_list *protocol_list;
struct objc_method_description_list *instance_methods, *class_methods;
} Protocol;
struct objc_protocol2
{
struct objc_class* class_pointer;
char *protocol_name;
struct objc_protocol_list *protocol_list;
struct objc_method_description_list *instance_methods, *class_methods;
// New ABI
struct objc_method_description_list *optional_instance_methods, *optional_class_methods;
struct objc_property_list *properties, *optional_properties;
};
#else /* __OBJC__ */
@class Protocol;
#endif
typedef void* retval_t; /* return value */
typedef void(*apply_t)(void); /* function pointer */
typedef union arglist {
char *arg_ptr;
char arg_regs[sizeof (char*)];
} *arglist_t; /* argument frame */
IMP objc_msg_lookup(id receiver, SEL op);
#ifdef __cplusplus
}
#endif
#endif /* not __objc_INCLUDE_GNU */

97
objc/runtime-legacy.h
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/* GNU Objective C Runtime internal declarations
Copyright (C) 1993, 1995, 1996, 1997, 2002, 2004, 2009 Free Software Foundation, Inc.
Contributed by Kresten Krab Thorup
This file is part of GCC.
GCC 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, or (at your option) any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __objc_runtime_INCLUDE_GNU
#define __objc_runtime_INCLUDE_GNU
#include <stdarg.h> /* for varargs and va_list's */
#include <stdio.h>
#include <ctype.h>
#include <stddef.h> /* so noone else will get system versions */
#include <assert.h>
#include "objc.h" /* core data types */
#include "objc-api.h" /* runtime api functions */
#include "thr.h" /* thread and mutex support */
#include "hash.h" /* hash structures */
#include "objc-list.h" /* linear lists */
#include "Availability.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
extern void __objc_add_class_to_hash(Class) OBJC_DEPRECATED; /* (objc-class.c) */
extern void __objc_init_selector_tables(void) OBJC_DEPRECATED; /* (objc-sel.c) */
extern void __objc_init_class_tables(void) OBJC_DEPRECATED; /* (objc-class.c) */
extern void __objc_init_dispatch_tables(void) OBJC_DEPRECATED; /* (objc-dispatch.c) */
extern void __objc_install_premature_dtable(Class) OBJC_DEPRECATED; /* (objc-dispatch.c) */
extern void __objc_resolve_class_links(void) OBJC_DEPRECATED; /* (objc-class.c) */
extern void __objc_register_selectors_from_class(Class) OBJC_DEPRECATED; /* (objc-sel.c) */
extern void __objc_register_selectors_from_list (MethodList_t) OBJC_DEPRECATED; /* (selector.c) */
extern void __objc_update_dispatch_table_for_class (Class) OBJC_DEPRECATED;/* (objc-msg.c) */
extern int __objc_init_thread_system(void) OBJC_DEPRECATED; /* thread.c */
extern int __objc_fini_thread_system(void) OBJC_DEPRECATED; /* thread.c */
extern void __objc_print_dtable_stats(void) OBJC_DEPRECATED; /* sendmsg.c */
extern void class_add_method_list(Class, MethodList_t) OBJC_DEPRECATED;
/* Registering instance methods as class methods for root classes */
extern void __objc_register_instance_methods_to_class(Class) OBJC_DEPRECATED;
extern Method_t search_for_method_in_list(MethodList_t list, SEL op) OBJC_DEPRECATED;
/* True when class links has been resolved */
extern BOOL __objc_class_links_resolved OBJC_DEPRECATED;
/* Number of selectors stored in each of the selector tables */
extern unsigned int __objc_selector_max_index OBJC_DEPRECATED;
/* Mutex locking __objc_selector_max_index and its arrays. */
extern objc_mutex_t __objc_runtime_mutex;
/* Number of threads which are alive. */
extern int __objc_runtime_threads_alive;
#ifdef DEBUG
#define DEBUG_PRINTF(format, args...) printf (format, ## args)
#else
#define DEBUG_PRINTF(format, args...)
#endif
BOOL __objc_responds_to (id object, SEL sel) OBJC_DEPRECATED; /* for internal use only! */
SEL __sel_register_typed_name (const char*, const char*,
struct objc_selector*, BOOL is_const) OBJC_DEPRECATED;
extern void __objc_generate_gc_type_description (Class) OBJC_DEPRECATED;
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __objc_runtime_INCLUDE_GNU */

0
objc/sarray.h
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61
objc/thr.h
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/* Thread and mutex controls for Objective C.
Copyright (C) 1996, 1997, 2002, 2004, 2009 Free Software Foundation, Inc.
Contributed by Galen C. Hunt (gchunt@cs.rochester.edu)
This file is part of GCC.
GCC 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, or (at your option)
any later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __thread_INCLUDE_GNU
#define __thread_INCLUDE_GNU
#include "objc.h"
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
/** Recursive mutex type used to protect the runtime. */
typedef void *objc_mutex_t;
/**
* Global runtime mutex. Acquire this before calling any unsafe runtime
* functions. Note that this is never needed if you restrict yourself to the
* public interfaces, which are strongly recommended.
*/
extern objc_mutex_t __objc_runtime_mutex;
/* Frontend mutex functions */
int objc_mutex_lock (objc_mutex_t mutex);
int objc_mutex_unlock (objc_mutex_t mutex);
/**
* Callback for when the runtime becomes multithreaded. As the runtime is now
* always in multithreaded mode, the callback is called as soon as it is
* registered and then discarded. This interface is maintained solely for
* legacy compatibility.
*/
typedef void (*objc_thread_callback) (void);
objc_thread_callback objc_set_thread_callback (objc_thread_callback func);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __thread_INCLUDE_GNU */

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objc/typedstream.h
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/* GNU Objective-C Typed Streams interface.
Copyright (C) 1993, 1995, 2004, 2009 Free Software Foundation, Inc.
This file is part of GCC.
GCC 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, or (at your option) any
later version.
GCC 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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
#ifndef __typedstream_INCLUDE_GNU
#define __typedstream_INCLUDE_GNU
#include "objc.h"
#include "hash.h"
#include <stdio.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
typedef int (*objc_typed_read_func)(void*, char*, int);
typedef int (*objc_typed_write_func)(void*, const char*, int);
typedef int (*objc_typed_flush_func)(void*);
typedef int (*objc_typed_eof_func)(void*);
#define OBJC_READONLY 0x01
#define OBJC_WRITEONLY 0x02
#define OBJC_MANAGED_STREAM 0x01
#define OBJC_FILE_STREAM 0x02
#define OBJC_MEMORY_STREAM 0x04
#define OBJC_TYPED_STREAM_VERSION 0x01
typedef struct objc_typed_stream {
void* physical;
cache_ptr object_table; /* read/written objects */
cache_ptr stream_table; /* other read/written but shared things.. */
cache_ptr class_table; /* class version mapping */
cache_ptr object_refs; /* forward references */
int mode; /* OBJC_READONLY or OBJC_WRITEONLY */
int type; /* MANAGED, FILE, MEMORY etc bit string */
int version; /* version used when writing */
int writing_root_p;
objc_typed_read_func read;
objc_typed_write_func write;
objc_typed_eof_func eof;
objc_typed_flush_func flush;
} TypedStream;
/* opcode masks */
#define _B_VALUE 0x1fU
#define _B_CODE 0xe0U
#define _B_SIGN 0x10U
#define _B_NUMBER 0x0fU
/* standard opcodes */
#define _B_INVALID 0x00U
#define _B_SINT 0x20U
#define _B_NINT 0x40U
#define _B_SSTR 0x60U
#define _B_NSTR 0x80U
#define _B_RCOMM 0xa0U
#define _B_UCOMM 0xc0U
#define _B_EXT 0xe0U
/* eXtension opcodes */
#define _BX_OBJECT 0x00U
#define _BX_CLASS 0x01U
#define _BX_SEL 0x02U
#define _BX_OBJREF 0x03U
#define _BX_OBJROOT 0x04U
#define _BX_EXT 0x1fU
/*
** Read and write objects as specified by TYPE. All the `last'
** arguments are pointers to the objects to read/write.
*/
int objc_write_type (TypedStream* stream, const char* type, const void* data);
int objc_read_type (TypedStream* stream, const char* type, void* data);
int objc_write_types (TypedStream* stream, const char* type, ...);
int objc_read_types (TypedStream* stream, const char* type, ...);
int objc_write_object_reference (TypedStream* stream, id object);
int objc_write_root_object (TypedStream* stream, id object);
long objc_get_stream_class_version (TypedStream* stream, Class class_type);
/*
** Convenience functions
*/
int objc_write_array (TypedStream* stream, const char* type,
int count, const void* data);
int objc_read_array (TypedStream* stream, const char* type,
int count, void* data);
int objc_write_object (TypedStream* stream, id object);
int objc_read_object (TypedStream* stream, id* object);
/*
** Open a typed stream for reading or writing. MODE may be either of
** OBJC_READONLY or OBJC_WRITEONLY.
*/
TypedStream* objc_open_typed_stream (FILE* physical, int mode);
TypedStream* objc_open_typed_stream_for_file (const char* file_name, int mode);
void objc_close_typed_stream (TypedStream* stream);
BOOL objc_end_of_typed_stream (TypedStream* stream);
void objc_flush_typed_stream (TypedStream* stream);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* not __typedstream_INCLUDE_GNU */
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