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Darwin 0.1 In-kernel Objective-C runtime
Changes from Ali to all the string class files. (12/23/92)
Changes from Derek to deal with name conflicts.
Cleaned up some warnings (7/23/91):
* Makefile (COMMONFLAGS): Changed -Wimplicit to -Wall.
Let's make this compile without warnings!
* List.m, Storage.m (read:, write:): Changed to return self.
* <various files>: Removed all unused local variables.
Added support for string objects (7/23/91):
* NXString.m, NXCharacterSet.m, unichar.h, StringTest.m: New files.
* Makefile (LOCAL_CLASSES): Added NXString.m and NXCharacterSet.m
* Makefile (LOCAL_INCFILES): Added unichar.h
* objc-runtime.m (_objc_fixup_string_object_class): New routine.
If NXConstantString is present in class hash table, copy it to
_NXConstantString_class and insert this address in class hashtable.
* objc-runtime.m (_objcInit): Call new routine after classes have
been fixed up (in _objc_map_selectors).
* objc-globaldata.m (_NXConstantString_class): New global variable.
Reduce pad by 36 bytes to compensate.
* spec_sys: Added slots for NXCompareCharacters(), NXEmptyString(),
and NXFindCharacters(). Added files NXString.o and NXCharacterSet.o
These changes will need to be integrated into libsys's copy.
Changed -[Object copy] (7/24/91):
* Object.m (copy): Chnaged to return [self copyFromZone: [self zone]]
rather than using _copy. The function object_copy() is no longer used
by the runtime system, and could probably be removed.
* List.[hm] (copy): Deleted redundant method.
* Storage.[hm] (copy): Deleted redundant method.
* HashTable.[hm] (copy): Deleted redundant method.
* NXString.[hm] (copy): Deleted redundant method.
* NXCharacterSet.[hm] (copy): Deleted redundant method.
Changed method names in Storage (7/24/91):
* Storage.[hm] (replaceElementAt:with:) Changed from replace:at:
and added 2.0 compatibility method in implementation only.
* Storage.[hm] (insertElement:at:) Changed from insert:at:
and added 2.0 compatibility method in implementation only.
* Storage.[hm] (removeElementAt:) Changed from removeAt:
and added 2.0 compatibility method in implementation only.
Cleaned up Makefile slightly (7/24/91):
* Makefile (BY_PRODUCTS): Added objcopt so that make clean removes
all files not installed by make installsrc.
Fixed bug #14923 in HashTable (7/24/91):
* HashTable.m (nextState:key:value:): Set key and value to NULL
when returning NO.
Fixed bug #14309 in Storage (7/24/91):
* Storage.m (setNumSlots:): Changed incorrect test
(numSlots > maxElements) to (maxElements > old).
* Storage.m (setNumSlots:): Changed to use a single realloc.
Fixed bug #5687 in hashtable (7/24/91):
* hashtable.h (NXHashInsertIfAbsent): Improved comment.
Added appendList: method (dmoore 7/24/91)
* List.m, List.h added method.
Added maptable functionality (dmoore 7/24/91)
* maptable.c maptable.m
Removed typedef for id when compiling Objective-C (7/26/91):
* objc.h (id): Do not define typedef for id when compiling
Objective-C (when __OBJC__ is predefined).
Made Objective C check for duplicate classes and use the one in the application
(dmoore 7/27/91)
* objc-runtime.m: Added following functions:
_objc_inform: Just prints message for now.
_resolveClassConflict: Makes sure that old class goes back in
if it's from the app.
_nameForHeader: Returns the name of an image.
_getExecHeader: Picks out the app header.
_headerForClass: Finds the mach_header containing a class.
Modified _objc_get_classes to check for duplicates.
Added maptable prototypes to objc-globaltext.m (dmoore 7/27/91)
Modified spec_sys to include NXString and maptable stuff.
snaroff (7/31/91):
Integrate blaines kernel mods in a rational way.
Renamed "_objc_internal_error" to "_objc_inform"...removed "_objc_inform",
they were nearly identical (snaroff 7/31/91)
Create file "objc-errors.m"...it includes _objc_fatal, _objc_inform,
__objc_error, and _objc_error. MUST ADD _objc_inform and NXLogError to list
of private externs!!!!!
Call _objc_fatal() instead of perror() in objc-sel.m...callings perror in these situations is bogus.
Have hashtable use NXLogError instead of fprintf().
Add field to objc_class for protocols...add protocol templates to objc-class.h
Installed new NXString files from ali (8/3/91):
* NXString.[hm]: Most methods are now statically typed.
* NXStringTest.m Changes to match.
Changes for clean compilation with new compiler (8/3/91):
* Makefile (objcopt): Use -ObjC flag with objc-edit.c
* objcedit.c (round): Made declaration global as well as definition.
* objcedit.c (map_input): Cast third arg to map_fd().
* objcopt.c (get_objc): Cast to (SEL *) two places.
* objc-sel.m (_sel_writeHashTable): Cast to (POHASH) two places.
* objc-class.m (cache_flush, _cache_expand, _cache_flush):
Made iteration variable unsigned.
* hashtable.m (CopyIntoReadOnly): Made iteration variable unsigned.
* typedstream.m (InternalWriteObject): Cleaned up printf format
specifiers to match args.
* typedstreamprivate.h: Changed all function declarations to static.
* objc-utils.m: Cleaned up printf format specifiers to match args.
* NXString.m (getBytes:range:, getCharacters:range:, NXFindCharacters,
find:range:flags:usingTable:, _debugPrint):
Made iteration variable unsigned.
* NXCharacterSet.m (init, addCharacters:length:,
removeCharacters:length:): Made iteration variable unsigned.
Improvements to NXConstantString's (8/12/91):
* NXString.[hm] (new): Add version which raises exception.
* NXString.[hm] (copyFromZone:): Return an NXReadOnlyString copy
instead of self, since our code might be unloaded.
* NXString.[hm] (write:): Write an NXReadOnlyString copy.
* NXString.[hm] (finishUnarchiving): Removed.
* NXString.[hm] (free): This now raises an error, since copyFromZone:
no longer returns self. You never allocate NXConstantString's, so you
should never free them.
* NXString.m (LENGTHFROMSTRING): Removed, since it is no longer used.
Fix for crashers with NULL symtab in module descriptors (8/12/91):
* objc-runtime.m (_objc_add_categories, _objc_get_classes,
_objc_map_selectors, _objc_callLoads): Check symtab for NULL.
* objc-runtime.m: Changed more iteration variables to unsigned.
Split up NXString.m (8/12/91):
* NXStringPrivate.h: New private header file.
* NXMutableString.m: New file.
* NXSimpleReadOnlyString.m New file.
* NXReadOnlyString.m New file.
* NXReadOnlySubstring.m New file.
* NXUniquedString.m New file.
* NXConstantString.m New file.
* NXReadWriteString.m New file.
* Makefile (PRIVATE_INCFILES, LOCAL_CLASSES): Added new files.
* spec_sys: Added new files, and new function _NXStringZone().
Added runtime support for Protocols (snaroff 8/21/91):
* Protocol.h, Protocol.m: additions.
* objc-class.h: removed temporary structs that described protocols.
* Changed Makefile for libkobjc.a
== New version objc-39 ==
Renamed release notes file (9/3/91):
* ObjCNotes.rtf: Renamed from ReleaseNotes-3.0.rtf
* ObjC.rtf-2.0: Renamed from ReleaseNotes-2.0.rtf
* Makefile: Install ObjCNotes.rtf instead of ReleaseNotes-3.0.rtf.
Fixed bugs with NXString's (9/3/91):
* NXString.m (isEqual:): Check [anObject isKindOf: NXString]
before going too far. Also return quickly when self and string are
the same pointer.
Fixed problems with local include files (9/3/91):
* <all header files>: Use <objc/foo.h> rather than "foo.h" when
including objc header files.
* Makefile: Add "-I." flag to be sure that local copies of header
files are used. This relies on the fact that there is symlink from
objc to ".". I hope that SGS can handle this.
Added new NXString release notes from Ali (9/6/91):
* ObjCNotes.rtf
Picked up fixes to NXString from Ali (9/6/91):
* NXMutableString.m NXReadWriteString.m NXSimpleReadOnlyString.m
NXString.[hm] StringTest.m: Use new versions.
* spec_sys: Removed entry for NXEmptyString().
Fix for order dependency in objc_loadModules (9/6/91):
* objc-load.m (objc_loadModules): Place all classes in class
hashtable before trying to install relationships. (Bug #15804)
Installed improved messenger (9/26/91):
* objc-msg.s: New file. Increases speed 30% on '040 while decreasing
it 20% on '030.
* objc-class.m (_cache_create): Also install new cache into class.
* objc-class.m (class_respondsToMethod, class_lookupMethod,
_class_lookupMethodInCache): No longer install new cache, since
_cache_create now does this.
Fixed minor memory leak with Protocols (9/26/91):
* Protocol.m (load): Free space returned by getmachheaders().
Integrated latest NXString classes from Ali (9/26/91)
Made maptable API private (9/26/91):
* (Makefile): Install maptable.h into /LocalDeveloper/Headers/objc.
Removed obsolete third arg to _class_lookupMethodAndLoadCache (10/4/91):
* objc-class.m (_class_lookupMethodAndLoadCache): Use objc_getClass
to get class object from meta-class object, rather than relying on
old selfref arg.
* objc-msg.s, objc-dispatch.c, objc-class.m, objc-private.h:
Delete third arg to _class_lookupMethodAndLoadCache().
Restored broken detection of messages sent to freed objects (10/4/91):
* objc-class.m (freedObjectClass, emptyCache): New static
class object which has a permanently empty cache.
* objc-class.m (_class_lookupMethodAndLoadCache): Check for dummy
freed object class rather than Nil.
* objc-class.m, objc-private.h (_objc_getFreedObjectClass): Function
to return new dummy freed object class (private extern).
* Object.m (_object_dispose, _object_reallocFromZone): Set isa
pointer to freed object class rather than Nil.
* spec_sys: Make _objc_getFreedObjectClass() a private extern.
Removed call to _cache_create() in messenger (10/4/91):
* objc-class.m (_class_install_relationships): Initialize all
classes and meta-classes to point to emptyCache.
* objc-class.m (_cache_expand): Call _cache_create if old cache
is emptyCache.
* objc-class.m (_cache_fill): Check to see if cache must be expanded
before inserting method into existing cache.
* objc-msg.s (objc_msgSend, objc_msgSendSuper): No longer check
class->cache for NULL and call _cache_create().
Modify cache flushing to handle emptyCache (10/7/91):
* objc-class.m (_cache_flush): Check for emptyCache.
* objc-class.m (cache_flush): Removed duplicate function.
(This version didn't reset the occupied count correctly.)
* objc-class.m (flush_caches): Use _cache_flush() rather than
cache_flush().
Make sure dynamically added classes have caches (10/7/91):
* objc-runtime.m (objc_addClass): Call _cache_create() if needed
for both the class and its metaclass.
Change strategy for archiving NXConstantString's (10/8/91):
* NXConstantString.m: Allow NXConstantString's to be alloc'ed,
but raise in the designated initializer. Simply inherit read and
write methods from NXSimpleReadOnlyString, but create a
finishUnarchiving method which returns an NXReadOnlyString.
* NXString.h: Update comments regarding NXConstantString's.
Fixes for shlib problems (10/8/91):
* NXString.m, NXStringPrivate.h: Renamed errorRaise() to
_NXStringErrorRaise().
* spec_sys: Make _NXStringErrorRaise() a private extern.
* spec_sys: Create branch slots for NXHashCharacters() and
NXLoadLocalStringFromTableInBundle().
Added wrapping #ifndef's to all header files (10/9/91)
Added support for initializing string objects (10/11/91):
* objc-runtime.m (_objc_fixup_string_objects): Initialize isa
pointers of all NXConstantString objects in __string_object section.
* objc-runtime.m (_objcInit): Call _objc_fixup_string_objects().
Simplify code for objc_getMetaClass() (10/14/91):
* objc-runtime.m (objc_getMetaClass): Call objc_getClass()
rather than duplicating logic. This avoids a potential bug
where objc_getMetaClass() wasn't checking for class aliases.
== New version objc-45 ==
Removed support for old string object strategy (10/28/91):
* objc-globaldata.m (_NXConstantString_class): Removed.
* objc-private.h (_NXConstantString_class): Removed.
* objc-runtime.m (objc_fixup_string_object_class): Removed.
* objc-runtime.m (_objcInit): Removed call to
objc_fixup_string_object_class().
* objc-runtime.m (_objcInit): Removed bogus arg to _objcInit(),
since crto0 calls _objcInit with no args.
Fix to account for changes with common makefiles (10/28/91)
* Makefile: Default SHLIBIDIR to /usr/local/src/libsys. Also added
-DSHLIB and defined VERSFLAGS.
Support for thread safety (11/13/91):
* objc-private.h (_objc_multithread_mask): Declare.
* objc-runtime.m h (_objc_multithread_mask): Initialize to -1.
* objc-private.h (OBJC_LOCK, OBJC_UNLOCK): New macros. Test
_objc_multithread_mask before using locks. For now, log a message
whenever an attempt to gain a lock fails.
* objc-runtime.m (_objc_multithreaded): Set _objc_multithread_mask
to 0 or -1.
* spec_sys: Make _objc_multithread_mask a private extern.
Also add branch table slot for _objc_multithreaded.
Changes to lock access to selector hashtable (11/13/91):
* objc-sel.m (selectorLock): Initialize.
* objc-sel.m (sel_isMapped, _sel_getMaxUid, sel_getName,
_sel_registerName, _sel_registerNameUseString,
_sel_unloadSelectors, sel_getUid): Protect operations with lock.
Changes to lock access to class hashtable (11/13/91):
* objc-sel.m (classLock): Initialize.
* objc-runtime.m (objc_getClass, objc_getClassWithoutWarning,
objc_addClass): Protect operations with lock.
* objc-class.m (flush_caches, class_poseAs): Protect operations with
lock.
* objc-load.m (objc_loadModules, objc_unloadModules): Lock class
hashtable while inserting new classes.
* Protocol.m (fixup_classes): Protect operations with lock.
* spec_sys: Make selectorLock a private extern.
Changes to lock dynamic loading/unloading (11/13/91):
* objc-sel.m (loadLock): Initialize.
* objc-load.m (objc_loadModules, objc_unloadModules):
Protect operations with lock.
Changes to lock messaging (11/13/91):
* objc-class.m (messageLock): Initialize.
* objc-class.m (class_initialize, class_respondsToMethod,
class_lookupMethod): Protect operations with lock.
* objc-msg-m68k.s: Protect operations with lock.
* spec_sys: Make messageLock a private extern.
Removed obsolete kruft (11/11/91):
* objc-load.m (objc_loadModule, objc_unloadLastModule): Removed.
* spec_sys (objc_loadModule, objc_unloadLastModule): Removed
branch table slots.
* objc-class.m (_freedName, _nilName): Removed.
* objc-class.m (_class_lookupMethodInCache): Removed (unused).
Reduced read/write data size (11/12/91):
* objc-class.m: Made error messages const.
* objc-error.m (_objc_error, __objc_error, _objc_fatal, _objc_inform):
Take const char *'s rather than char *'s.
* objc-runtime.h (_error): Take const char * rather than char *.
* Object.m: Made error messages const.
* Object.[hm] (error:): Take const char * rather than STR.
Removed all precompiled header warnings in debug version (11/12/91)
Eliminated warnings about functions not returning values (11/18/91):
* objc-errors.m (__objc_error, _objc_error, _objc_fatal):
Declare volatile.
* objc-errors.m (__objc_error): Call _objc_error() if (*_error)()
returns.
* Object.m (error:,...):Call _objc_error() if (*_error)() returns.
* except.c (NXDefaultExceptionRaiser): Declared volatile.
* except.c (_NXRaiseError): Call abort() if (*ExceptionRaiser)()
returns.
* typedstream.m (classError, typeDescriptorError, writeRefError):
Declared volatile.
Don't assume that ints may be addressed on short boundaries (11/18/91):
* objc-runtime.m (classIsEqual): Only check first char before
calling strcmp().
Fix cache flushing when removing category class methods (11/18/91):
* objc-runtime.m (flush_caches): Flush instance methods for classes
and class methods for metaclasses. Delete obsolete meta argument.
* objc-runtime.m (class_addInstanceMethods, class_removeMethods):
Delete obsolete meta arg in calls to flush_caches().
* objc-runtime.m (class_addClassMethods): Simply call
class_addInstanceMethods() with the metaclass.
Fix for cache size bug (11/18/91):
* objc-class.m (_cache_fill): Fix bug whereby the cache occupied count
wasn't reset when caches were grown. This bug was introduced when
the emptyCache code was added.
API changes for Don (11/19/91):
Fixes to dynamic loading (11/20/91):
* objc-load.m (objc_loadModules): Insert all classes into class
hashtable before calling _class_install_relationships() to avoid
order probelms. Also improved error handling greatly. All code
is unloaded on errors, and the class hashtable is left unmodified.
Changes to lock protocols (11/21/91):
* Protocol.m (protocolLock): Initialize.
* Protocol.m (fixup_classes, _register:numElements:,
_fixup:numElements:, getProtocolNamed:): Protect operations with lock.
Fix for NX_VALRETURN problem (11/21/91):
* error.h (NX_VALRETURN): Evaluate argument inside current exception
context.
* error.h (NX_VALRETURN, NX_VOIDRETURN): Use do {...} while (0) to
swallow the semicolon.
Added "extern" to all function prototypes in header files (11/21/91)
Fix for deadlock problem (12/2/91):
* objc-load.m (objc_loadModules): Avoid deadlock problem with
string objects. Do not lock class hashtable at all. Removed direct
access to class hashtable.
== New version objc-49 ==
Fix for NXBundle load-error messages (12/19/91):
* NXBundle.m (ensureLoaded): Error message was backwards.
== New version objc-50 ==
Fix for NXBundle load-error messages (1/2/92):
* NXString.h (NXSTRING_ERROR_BASE): Renamed to NX_STRING_ERROR_BASE
per FCC change (Bug #17201).
Added support for C++ runtime startup (1/14/92):
* cplus_init.c: New file. Contains one entry point, _cplus_init()
which calls all the constructors in the image and registers all of
the destructors with atexit(). It also contains the definition of
the symbols .constructors_used and .destructors_used, so that this
function can be pulled in as needed by the compiler.
* Makefile: Added new file cplus_init.c to Makefile.
* spec_sys: Added new file cplus_init.o and new entry point
_cplus_init().
* spec_sys: Also mark .constructors_used and .destructors_used as
nobranch_text symbols, since they don't need branch table entries
(they are just flag symbols).
Added new string optimizations from Ali (1/24/92):
* NXString.[hm], NXSimpleReadOnlyString.m, NXReadWriteString.m
* StringTest.m: New tests from Ali also.
Fixed minor leak in +[NXString initialize] (1/27/92):
* NXString.m (initialize): Test static variable to avoid initializing
twice. Testing for [self class] == [NXString class] isn't good
enough since users may explicitly call [NXString initialize] more
than once (Workspace was doing this).
Added Makefile target for StringTest (1/27/92):
* Makefile: Just say make stringtest after using make debug.
Added support for protocols in categories (1/30/92):
* objc-class.h (struct objc_category): Added new protocols field to
record protocols adopted by a category.
* objc-class.h (struct objc_protocol_list): Added new next field to
allow Protocols in categories to be chained on to the class just
like methods are.
Added runtime support for protocols in categories (1/31/92):
* Protocol.m (fixup_classes), objc-load.m (objc_loadModules):
Adjust protocols pointer to compensate for new "next" field in
struct objc_protocol_list.
* Object.m (conformsTo:, conformsToProtocolNamed:,
descriptionForMethod:, descriptionForInstanceMethod:):
Look for protocols adopted by categories by walking new "next" field.
Be sure not to reference "next" field in old versions.
* Protocol.m (_fixup:numElements:): Adjust protocol_list pointer to
compensate for new "next" field in struct objc_protocol_list. Note
that this field is always ignored in the protocol_list's attached to
protocols, since there is no way to make a protocol adopt additional
protocols using some sort of category on a protocol. We could even
have used a separate struct here to save space, but this is easier
and more consistent.
* objc-runtime.m (_objc_add_category): Append category protocols to
class protocol list. Added new version argument to deal with version
madness.
* objc-runtime.m (_objc_add_categories): Call __objc_add_category()
with new version argument.
* objc-load.m (objc_loadModules): Call _objc_add_category()
with new version argument.
* objc-class.m (_class_removeProtocols): New function.
* objc-runtime.m (_objc_remove_category): Call new function.
Added new version argument to deal with version madness.
* objc-load.m (objc_unloadModules): Call _objc_remove_category() with
new version argument.
* objc-private.h (_objc_add_category, _objc_remove_category):
Add new version argument to prototypes.
* objc-private.h (_class_removeProtocols): Add new prototype.
* spec_sys: Make _class_removeProtocols() a private extern.
Improved format of objc syslog messages (1/31/92):
* objc-error.m (NXVLogError): Deleted.
* objc-error.m (_objc_error, _objc_inform): Rewrote to only call
_NXLogError() once.
Removed compatibility alias stuff (2/6/92):
* objc-runtime.m (alias_map, _objc_addClassAlias,
_objcAddAppkitAliases): Removed.
Plugged memory leak in caches (2/6/92):
* objc-class.m (emptyCache): Made global.
* objc-private.h (emptyCache): Declare.
* spec_sys: Made emptyCache a private extern.
* objc-runitime.m (objc_addClass): Use emptyCache rather than
calling _cache_create().
* objc-class.m (_class_install_relationships): Only set caches if
NULL. They may have already been set by objc_addClass().
Removed internal compatibility code (2/6/92):
* Object.m (conformsToProtocolNamed, conformsToGivenName):
Removed.
* Protocol.m (getProtocolNamed:, conformsToProtocolNamed:): Removed.
Integrated NXBundle changes from Dave (2/6/92):
* NXBundle.m
* NXBundlePrivate.h: New file.
* Makefile: Added NXBundlePrivate.h to PRIVATE_INCFILES.
Removed diagnostic from Objective-C locking (2/8/92):
* objc-private.h (OBJC_LOCK): No longer call _objc_inform().
Update release notes (2/6/92):
* ObjCNotes.rtf.
Fixed bogus comment which leads to leaks (2/8/92):
* hashtable.h: Changed the comment to say that when the free argument
is NULL, objects are not freed.
== New version objc-51 ==
Fixed problems with objcopt (2/15/92):
* objc-sel.m (_sel_writeHashTable): Be sure to zero empty hashtable
entries and next pointers!
* objcopt.c (get_objc, print_method_list2): Enter protocol strings
into hashtable also!
Added new debug tool for objcopt (2/15/92):
* objcopt_print.c: New testing program.
* objc-sel.m (_sel_writeSelectors): New function (#ifdef FREEZE).
* Makefile: Added objcopt_print.c
Fixed versioning bug in changes for protocols in categories (2/15/92):
* Object.m (descriptionForMethod:, descriptionForInstanceMethod):
Check cls->isa->version rather than cls->version. This bug caused
protocols not to be searched.
Changes for new string sections (2/21/92):
* objc-runtime.m (_objc_map_selectors): Use strings from either
or both new-style and old-style string sections.
* objcopt.c (main): Use strings form either (but not both) string
sections.
Performance enhancements to execption handlers (2/21/92):
* except.c (Base, findme): Allocate first thread's exception stack
statically so that we don't keep an extra page of the heap hot.
These changes require an extra 20 bytes of static data.
* except.c (BaseAltHandlers, _NXAddAltHandler): Also statically
allocate a small number of altHandlers so that we never malloc them
in normal usage. This number is based on the maximum typical depth
of lockFocus'es. The current value is 12, which requires an extra
144 bytes of static data.
Fixed small leak in _cplus_init() (2/22/92):
* cplus_init.c (call_constructors, call_destructors): Free
header list after processing it.
Added warnings in preparation for removing protocol hash table (2/22/92):
* Protocol.m (fixup_classes, _fixup:numElements:): Warn about any
reference to protocols by name.
Removed protocol hash table (2/6/92):
* Protocol.m (protocolHash, protocolLock): Removed all references.
* Protocol.m (_register:numElements:): Removed.
* objc-load.m (objc_loadModules): No longer need to call
[Protocol _register:numElements:].
* Protocol.m (load): Only make one pass over protocols (to look for
old versions, and to adjust protocol_list pointers for "next" field.
Don't attempt to install protocols by name.
* objc-load.m (objc_loadModules): Don't attempt to install protocols
by name. Just zero the protocol list field in this case.
Moved class and selector hashtables into ObjC zone (2/22/92):
* objc-class.m (_objc_create_zone): Now return ObjC zone.
* objc-runtime.m (_objcInit): Record ObjC zone in new static.
* objc-runtime.m (_objc_get_classes): Place class hashtable in
ObjC zone.
== New version objc-52 ==
More performance enhancements to execption handlers (2/21/92):
* except.c (findme): Added new handler argument which is used when
removing handlers. This allows us to eliminate half of the calls to
cthread_self(). Changed all callers.
* except.c (Lock, mylock): Allocate both locks statically.
Fix for deadlock bug in recent exception handler changes (2/24/92):
* except.c (findme): Fix deadlock bug in recent changes.
== New version objc-53 ==
Fix for compatibility bug in recent string changes (2/25/92):
* objc-runtime.m (_objc_map_selectors): Don't use the largest header
optimization if it contains both new and old style string sections,
since the selectors will not have been uniqued properly.
== New version objc-54 ==
Changes to improve cache utilization (2/24/92):
* objc-class.m (CACHE_SIZE, META_CACHE_SIZE): Try using 8 and 4
rather than 16 and 8, to see if we can save some space.
* objc-class.m (_cache_fill): Allow caches to be exactly 3/4 full
without growing. This allows 3 entries in a 4 slot cache, 6 entries
in an 8 slot cache, and 12 entries in a 16 slot cache. For larger
caches the change is insignificant. This should result in more
efficient usage of small caches, where chain lengths are small anyway.
Fix for second bug in recent exception handler changes (2/24/92):
* except.c (_NXAddAltHandler): When switching from static to heap
allocated alt-handlers, make sure to copy over static data.
* except.c (BaseAltHandlers): After testing bug fix, increased
number of statically allocated handlers to 16. (The color panel
uses 13.)
== New version objc-55 ==
Changes to cache flushing/growing strategy (2/24/92):
* objc-class.h (CLS_FLUSH_CACHE): New bit in class data structure
indicates whether the cache should be flushed rather than grown.
* objc-class.m (_cache_fill): If the CLS_FLUSH_CACHE bit is set,
flush the cache, otherwise expand it as usual.
* objc-class.m (_cache_create): Clear the CLS_FLUSH_CACHE bit.
* objc-class.m (_cache_flush): Clear the CLS_FLUSH_CACHE bit.
Changed the argument from a cache pointer to a class pointer.
* objc-class.m (_cache_expand): Don't implicitly flush the cache
when expanding it. Insert the old entries into the new cache.
This is so we don't flush any more than we used to. Set the
CLS_FLUSH_CACHE bit.
Fixed a latent memory leak in cache flushing (2/24/92):
* objc-class.m (_cache_flush): Free any negative cache entries.
Fixed a latent cache bug (2/24/92):
* objc-class.m (_cache_fill): Update the mask when expanding the cache
so that we don't insert the entry using the wrong hash.
Changes to reduce maximum chain lengths (2/25/92):
* objc-class.m (_cache_fill): Insert new entries at the head of the
chain rather than the tail. This causes us to add 1 to n chains rather
than adding n to 1 chain.
Removed obsolete functions (2/25/92):
* objc-sel.m (_sel_registerName): Removed. This was present only
for internal shlib compatibility while it was renamed to
sel_registerName(). This obsolete dependency has been removed.
* objc-sel.m (_sel_getMaxUid): Removed. This was only used by debug
routines in objc-utils.m. It doesn't make sense any more.
Changes to allow freeze-drying of all selector hashtables (2/25/92):
* objc-sel.m: A complete rewrite.
* objc-runtime.m (struct header_info): Added size and freeze fields.
* objc-runtime.m (_objc_get_modules): Sort headers by size, but place
all headers which have a freeze-dried hashtable before all others.
* objc-runtime.m (_objc_map_selectors): A complete rewrite.
Changes to reduce the size of the class hashtable (2/28/92):
* objc-runtime.m (_objc_get_classes): Create hashtable with an initial
size of class_count rather than 2 * class_count. This is the criterion
which the hashtable uses internally to decide when to grow. The
hashtable code also rounds this size up to a power of two.
More changes to reduce the selector hashtable (2/29/92):
* objc-sel.m (HASH_ALLOC_LIST_SIZE): Reduced to 40 from 170.
For Draw, this reduces wastage from 688 bytes to 256 bytes.
With this change we call malloc 10 times instead of 3, which
shouldn't be significant.
More changes to reduce method cache size (2/29/92):
* objc-class.m (CACHE_SIZE): Reduced from 8 to 4. After using Draw
heavily, 23% of all instance-method caches are still the minimum size.
They have an average of 3.63 entries, and have a lower efficiency than
other caches.
== New version objc-56 ==
Changes to eliminate separate string zone (3/3/92):
* NXString.m (initialize): Just use the default zone for now,
since creating a separate zone seems to hurt more than it helps.
We should probably put this back for 4.0 when it will be used
much more heavily.
Changes to reduce hashing overhead (3/3/92):
* objc-private.h (_objc_strhash): New static inline version of old
_sel_hash().
* objc-sel.m (_sel_hash): Removed. Use _objc_strhash() instead.
* objc-runtime.m (classHash): Use _objc_strhash() directly rather
than using _strhash(). This avoids one function call per hash.
* HashTable.m (HASHSTR): Use _objc_strhash() directly rather
than using _strhash(). This avoids one function call per hash.
* objc-private.h (_strhash): Removed. This function is no longer
used within objc_proj. It is left only in case it is being used
elsewhere (since it is not a private extern).
Changes to fully implement class references (3/4/92):
* objc-load.m (objc_loadModules): Fixup class references.
* objc-class.m (class_poseAs): Run through class references
substituting the imposter for the original.
* objc-runtime.m (_objc_headerVector, _objc_headerCount,
_objc_addHeader, _objc_removeHeader): New private externs.
* objc-load.m (objc_loadModules, objc_unloadModules): Call
new functions _objc_addHeader() and _objc_removeHeader().
Fix for NXBundle bug (3/6/92):
* NXBundle.m (loadCallback): Installed Bertrand's fix to correct
problems with categories.
== New version objc-57 ==
More performance enhancements for exceptions (3/16/92):
* except.c (addme): New routine to handle allocation portion of
findme().
* except.c (findme): Made inline. Now calls addme() to handle
uncommon cases.
* except.c (trickyRemoveHandler): Inlined most common case of
trickyRemoveHandler() into both callers. Now trickyRemoveHandler()
is only called when the handler to be removed isn't on the top of
the handler stack.
== New version objc-58 ==
Fix for spurious messages introduced with last change (3/19/92):
* except.c (_NXRemoveHandler, _NXRemoveAltHandler): Don't call
trickyRemoveHandler() for case which is handled inline.
== New version objc-59 ==
Fix for crasher in bundles (3/20/92):
* NXBundle.m (ensureLoaded): Limit error messages from rld() to
3000 characters, since _NXLogError() has a 4K fixed size buffer.
Error messages this long are not really appropriate for syslog.
(Bug #20035)
Fix for crasher when reloading modules after unloading them (3/20/92):
* objc-load.m (objc_unloadModules): Unload selectors from both
new-style and old-style string sections. (Bug #20414)
Fix for problem with type descriptors (3/23/92):
* objc-class.m (SkipFirstType): Treat 'oneway' as a type-qualifier
rather than as a type. The compiler now encodes 'oneway void' as
"Vv" rather than just "v". This is consistent with how it treats
'bycopy'.
Removed obsolete methods from NXBundle (3/24/92):
* NXBundle.h (Compatability): Removed Compatability category which
contained the initForPath: and path methods.
== New version objc-60 ==
Fix for problems reading strings files (4/20/92):
* NXStringTable.m (parseWord, writeWord): Handle all escape sequences
exactly the same way that the compiler's lexer does. Also print
backslashes such that they will be read back correctly. (Bug #21634)
Improved error handling of exceptions (4/20/92):
* except.c (trickyRemoveHandler): Check for exception frames which are
not in the valid portion of the stack. Log an error when popping
a mismatched non-alt handler. use NXLogError() rather than calling
syslog() directly. (Bug #22200)
Fix for malloc not being overrideable (5/7/92):
* cplus_init.c: Must #include shlib.h! (Bug #23152)
== New version objc-61 ==
Fix for string hashtable problems in typedstreams (6/3/92):
* typedstream.m (freeStrToInt): New function to free uniqued strings.
* typedstream.m (_NXOpenEncodingStream): When creating string
hashtable, use freeStrToInt as free method.
* typedstream.m (_NXEncodeSharedString): Copy strings before inserting
them into the string hashtable.
* typedstream.m (NXWriteArray): No longer need to unique type string
before calling _NXEncodeSharedString().
Improvements to release notes (6/3/92):
* ObjCNotes.rtf: Fixed numerous spelling mistakes. Described new
thread safe exceptions. Mentioned new incompatibilities between
@encode and typedstreams.
== New version objc-62 ==
Improvements to release notes (6/12/92):
* ObjCNotes.rtf: Removed incorrect comment about NXCtype.h moving
to /NextDeveloper/Headers/objc. (Bug #25517)
Fix for problems with cthread_exit() and exceptions (6/12/92):
* except.c (_NXClearExceptionStack): New function to clear exception
stack. This will be called from cthread_free(), since the cthread
package re-uses cthread_self id's. (Bug #25562)
* spec_sys (_NXClearExceptionStack): New private extern.
Fix for problems with cache flushing and dynamic loading (6/16/92):
* objc-runtime.m (_objc_add_category): Flush method caches of class
to which category is added. Otherwise incorrect negative cache entries
may persist. Note that _objc_remove_category() was already handling
this. (Bug #25801)
* objc-class.m (_objc_flush_caches): New function to flush both
instance and class method caches of a class and its subclasses.
* objc-private.h (_objc_flush_caches): Declare new function.
* spec_sys (_objc_flush_caches): New private extern.
== New version objc-63 ==
Fix for crasher in appkit server (6/24/92):
* typedstream.m (NXReadObjectFromBufferWithZone): Raise an exception
if NXOpenTypedStream() returns nil (rather than crashing). After 3.0
we should probably make NXOpenTypedStream() rasie the exception itself
rather than returning nil (it raises exceptions in other cases).
(Bug #26058)
== New version objc-64 ==
Fix for awkward library dependency introduced by recent change (6/26/92):
* except.c (addme): Pass address of _NXClearExceptionStack() to
cthreads using new private extern _set_cthread_free_callout().
This avoids a link time dependency of cthreads on exceptions.
* except.c (_NXClearExceptionStack): Now static.
* spec_sys (_NXClearExceptionStack): Removed private extern.
* Makfile (objcopt.cmd): Use -lc_static when linking objcopt
since we are overriding lots of shlib symbols.
== New version objc-65 ==
Changes to fix ISSELECTOR binary compatibility problem (7/10/92):
* objc-sel.m (sel_isMapped): Rewrote to provide correct functionality
for backward compatibility. This function is not used by 3.0 Apps,
and was essentially broken. (Bug #23479)
Fix for unloading bug (7/10/92):
* objc-sel.m (_sel_unloadSelectors): Algorithm to delete entries
from linked list was broken. Use new simpler loop.
== New version objc-100 ==
Integrated Doug's changes for the nrw kernel (3/25/92):
* objc-runtime.m (objc_msgSendv): Rather than refusing to compile
this routine on the 88k, panic if it is ever called. This routine
must be rewritten in assembly!
* objc-class.m (_forward): Don't refuse to compile on the m88k.
It won't work as written, but hopefully it won't be needed for a while.
This routine must be rewritten in assembly!
* objc-private.h (OBJC_LOCK, OBJC_UNLOCK): Turn off kernel locks until
the m88k messenger uses locks.
* hashtable.m (CopyIntoReadOnly): Use valloc() rather than
vm_allocate() for kernel builds.
Minor bug fix (3/25/92):
* Object.m (error:): Call va_end after last use of ap.
Chnages to get typedstream.m to compile for m88k (3/30/92):
* typedstream.m (WriteValue, ReadValue): Rewritten versions of
WriteValues() and ReadValues(). Removed "align" argument. These
functions now only handle one object at a time, and do not handle
varargs at all. This has been moved up to NXWriteTypes() and
NXReadTypes().
* typedstream.m (NXWriteType, NXReadType): Modified to use
WriteValue() and ReadValue().
* typedstream.m (NXWriteTypes, NXReadTypes): Rewrote to use
WriteValue() and ReadValue(). Iteration over variable arguments is
now performed here rather than in WriteValues() and ReadValues().
All arguments are assumed to be void *'s.
* typedstream.m (NXWriteArray, NXReadArray): Rewrote to match
the array case of WriteValue() and ReadValue().
* typedstream.m (SizeOfType): New routine to compute sizes and
alignments of arbitrary C types. This uses "sizeof" and "__alignof"
for the basic types, and makes assumptions about how structs, unions
and arrays are layed out given these. This is slightly (but not
too horribly) machine-dependent.
* typedstream.m (roundUp, max): New support routines.
* typedstream.m (SubTypeUntil, SizeOfSimpleType, SizeOfUnion, buffer):
Deleted obsolete support routines.
* typedstream.m (next_field_addr, next_field, next_arg, next_addr):
Deleted old varargs support which was non-portable and buggy.
* typedstreamTest.m: New test program for typedstreams.
Simple Makefile changes (4/2/92):
* Makefile: Use make typedstreamtest after using make debug.
* Makefile: Added Protocol.o to libkobjc.
== New version objc-101 ==
Changes to implement forwarding for the m88k (4/2/92):
* objc-class.m (_forward, _errDoesntRecognize): #ifdef'ed out.
* objc-class.m: Changed all references to _forward() to
_objc_msgForward().
* objc-private.h (_objc_msgForward): Declare.
* spec_sys: New private extern _objc_msgForward().
* objc-msg-m68k.s (_objc_msgForward): New function.
* objc-msg-m88k.s (_objc_msgForward): New function.
* objc-class.m (objc_msgSendv): #ifdef'ed out.
* objc-msg-m68k.s (objc_msgSendv): New function.
* objc-msg-m88k.s (objc_msgSendv): New function.
Integrated i386 mods (4/14/92):
* objc-msg-i386.s: New file.
* objc-msg.s: Also support i386 architecture.
Minor cleanups (4/14/92):
* Created new Test directory, and moved all test files there.
* StreamTable.m (write:): Use "(void **) &pick" rather than
"&((void *) pick)" to avoid problems in GCC-2.0.
* Object.m (_object_reallocFromZone): Declare newObject to Object *
rather than id to avoid warning.
== New version objc-102 ==
Fixes for problems passing structs by value to methods (6/3/92):
* objc-msg-m88k.s (objc_msgSend, objc_msgSendSuper): Preserve both
argument registers and argument area on the stack since strcuts
passed by value are placed on the stack rather than in registers even
if their stack offset is less than 32.
Fix for initial problems with forwarding (6/3/92):
* objc-msg-m88k.s (_objc_msgForward): Fixed incorrect branch sense
in recursion detection.
* objc-msg-m88k.s (_objc_msgForward): Must save and restore pc
while sending forward:: to self!
== New version objc-103 ==
Fix for further problems with forwarding (6/3/92):
* objc-msg-m88k.s (_objc_msgForward): Store parameter stack area
in addition to parameter registers, since we don't know which
will be used.
* objc-msg-m88k.s (_objc_msgForward): Restore parameter stack area.
* objc-msg-m88k.s (_objc_msgForward): Use "and" rather than "mask"
to align stack pointer.
== New version objc-104 ==
Added support for Objective-C in loadable kernel servers (6/8/92):
* Makefile: Added objc-load.o to kernel library.
* objc-load.m (objc_registerModule): New routine to process a
previously loaded module.
* objc-load.m (objc_loadModules): Use new routine after calling
rld_load().
* objc-load.m (objc_unregisterModule, objc_unloadModules): Similar for
unloading.
New optimized i386 messager from Bruce (6/17/92):
* objc-msg-i386.s: New optimized version.
== New version objc-107 ==
Change typedstream byteswapping to use new architecture-project API
* typedstream.m: add swap routines, and modify consumers of these
routines.
* objc-msg-m88k.s: pick up Dave's changes
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