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NEWS
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NEWS
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;;;; -*- coding: utf-8; fill-column: 78 -*-
changes relative to sbcl-1.0.44:
* enhancement: ~/ and ~user/ are treated specially in pathnames.
Refer to documentation for details.
* enhancement: ASDF has been updated to version 2.010.
* optimization: mutated closed-over variables that are only accessed by
DYNAMIC-EXTENT closures (currently only FLET and LABELS functions
declared to be DYNAMIC-EXTENT) are stored directly in their containing
stack frame, rather than allocating a VALUE-CELL (lp#586103).
* optimization: UNWIND-PROTECT cleanup functions are now declared
DYNAMIC-EXTENT.
* bug fix: backtracing function with &REST arguments now shows the full
argument list. (lp#310173)
* bug fix: return types for functions with complex lambda-lists are now
derived properly (lp#384892)
* bug fix: when SPEED > SPACE compiling CONCATENATE 'STRING with constant
long string arguments slowed the compiler down to a crawl.
* bug fix: closure VALUE-CELLs are no longer stack-allocated (lp#308934).
* bug fix: non-standard MAKE-METHOD-LAMBDA methods could break RETURN-FROM
in the DEFMETHOD body.
* bug fix: #<SB-C::DEFINED-FUN ...> should no longer appear in compiler
messages, being instead replaced with the corresponding function name.
* bug fix: don't derive overly complex unions of numeric types for arithmetic
operators. (lp#309448)
changes in sbcl-1.0.44 relative to sbcl-1.0.43:
* enhancement: RUN-PROGRAM accepts :EXTERNAL-FORMAT argument to select the
external-format for its :INPUT, :OUTPUT, AND :ERROR :STREAMs.
* enhancement: ALLOCATION-INFORMATION also provides the page the object
resides on.
* enhancement: default dynamic-space size can be configured at build-time
without touching source, using the --dynamic-space-size argument to make.sh.
* enhancement: DESCRIBE recognizes symbols naming optimization policy
qualities, and mentions ALWAYS-BOUND declarations.
* enhancement: ATOMIC-INCF now supports AREF of (SIMPLE-ARRAY SB-EXT:WORD (*))
as a place.
* enhancement: ASDF has been updated to 2.009.
* enhancement: the system detects known type-erros in calls better,
signalling a full warning about violated proclaimed FTYPEs and violations
of derived FTYPEs within the same file, including self-calls.
* enhancement: new function: SB-EXT:DELETE-DIRECTORY is now provided.
* optimization: constant-folding exploits numeric and character types, in
addition member types.
* optimization: numeric, character and member types that are inhabited by
exactly one value are tested with EQL.
* optimization: more conditional branches are eliminated during IR1.
Branches are simplified before performing if/if-conversion, and simple
equivalent branches (that only read the same constant or variable) are
merged.
* improvements to the Windows port:
** change: canonical unparsing form for pathname namestrings now uses / as
directory separator. NATIVE-NAMESTRING still uses \ as the separator.
** bug fix: stackoverwriting due to incorrect usage of PeekConsoleInput
on Windows. (thanks to Kalyanov Dmitry)
** bug fix: build now works on cygwin with GCC 4.x installed. (thanks to
Kalyanov Dmitry)
** bug fix: run-sbcl.sh now works on Cygwin. (thanks to Kalyanov Dmitry)
* bug fix: compiler failed to derive the result-type of MAKE-ARRAY as
(AND VECTOR (NOT SIMPLE-ARRAY)) when appropriate. (lp#309130)
* bug fix: (THE (VALUES ...)) in LOAD-TIME-VALUE caused a compiler-error.
(lp#646796)
* bug fix: interrupts arriving during CL:OPEN caused an error.
* bug fix: overeager character buffering could cause input to block
spuriously when reading from a pipe (lp#643686)
* bug fix: more efficient timer expiry should avoid starvation on systems
where number of SIGALRMs per second is restricted. (lp#375515)
* bug fix: non-unicode builds no longer fail (broken since 1.0.36.15).
* bug fix: compile-times no longer scale linearly with the size of
quoted lists in source-code. (lp#654289)
* bug fix: better errors for unknown external-formats in OPEN. (lp#561974)
* bug fix: DEBUG>SPEED no longer degrades ALIEN-FUNCALL performance quite
so badly. (lp#654485)
* bug fix: SB-INTROSPECT:FIND-DEFINITION-SOURCES-BY-NAME no longer signals
an error for eg. STRUCTURE. (lp#458015)
* bug fix: LOOP WITH NIL = ... signalled an unused variable style-warning.
(lp#613871, thanks to Roman Marynchak)
* bug fix: more reliable &REST list type derivation. (lp#655203)
* bug fix: PPRINT-LOGICAL-BLOCK multiply-evaluated :PER-LINE-PREFIX,
and issued pointles code-deletion notes for it, :PREFIX, and :SUFFIX.
* bug fix: the compiler didn't utilize the proclaimed ftype for functions
also declared NOTINLINE. (lp#655581)
* bug fix: the compiler could attempt to emit constant left shifts of
greater value than n-word-bits. (lp#309063)
* bug fix: (SETF SYMBOL-FUNCTION) and (SETF FDEFINITION) clear derived
type information for the function being set. (lp#659220)
* bug fix: the system used to signal bogus STYLE-WARNINGs when functions
containing self-calls were recompiled with a new signature, and failed
to warn when a self-call using the old signature was left in. (lp#655126)
* bug fix: incorrect FILE-POSITION on streams opened using :EXTERNAL-FORMAT
:DEFAULT when the default external had character size other than 8 bits.
(lp#657183)
* bug fix: derived types of functions in the same file were implicitly
trusted, leading to potential heap corruption when those function were
defined incompatibly. (lp#657499)
* bug fix: existing ASDF source registries are ignored when building
contribs (lp#659105)
* bug fix: short-form DEFSETF checks that the second argument is a symbol
(lp#655824, thanks to Roman Marynchak)
* bug fix: (SETF MACRO-FUNCTION) clobbered macro-definitions before
package-lock violation was detected. (lp#660752)
* bug fix: the system can store different docstrings for a single function
under different names. (lp#661631, regression from 1.0.29.24)
* bug fix: source-locations of DEFGENERIC forms weren't getting recorded
properly. (lp#384801)
* bug fix: (COERCE X '(SIMPLE-VECTOR 5)) and similar coercions to vectors
of specified length could confuse the type derivation in unsafe code.
(lp#655872)
* bug fix: SB-POSIX:FORK now signals an error if an attempt to
fork with multiple Lisp threads running is made on every platform,
not just Darwin. (lp#451111)
* bug fix: SB-BSD-SOCKETS and SB-SIMPLE-STREAMS could leave stale finalizers
around when core was saved, which could cause undefined behaviour when the
core was reified.
* bug fix: Allow UNTRACE of functions that are no longer defined
(lp#667657, thanks to Attila Lendvai)
* bug fix: MAKE-ARRAY calls with invalid keyword argument lists now signal a
compile-time warning (lp#664373, thanks to Stas Boukarev)
changes in sbcl-1.0.43 relative to sbcl-1.0.42:
* incompatible change: FD-STREAMS no longer participate in the serve-event
event-loop by default. (lp#316072)
** In addition to streams created by explicit calls to MAKE-FD-STREAM this
affects streams from CL:OPEN.
** Streams from SOCKET-MAKE-STREAM still participate in serve-event by
default, but this is liable to change: applications needing serve-event
for socket streams should explicitly request it using :SERVE-EVENTS T
in the call.
* enhancement: SB-EXT:WORD type is provided for use with SB-EXT:ATOMIC-INCF
&co.
* enhancement: CLOS effective method functions and defclass slot typechecking
function now have debug names for use in backtraces and profiles.
* enhancement: ASDF has been updated to version 2.004. (lp#605260, thanks to
Faré Rideau)
* enhancement: symbols are printed using fully qualified names in several
error and warning messages which are often associated with package
conflicts or mixups (lp#622789, thanks to Attila Lendvai)
* bug fix: SB-BSD-SOCKETS:SOCKET-CONNECT was not thread safe. (lp#505497,
thanks to Andrew Golding)
* bug fix: reading /proc files on Linux works. (lp#425199)
* bug fix: DOTIMES accepted literal non-integer reals. (lp#619393, thanks to
Roman Marynchak)
* bug fix: WRITE-TO-STRING compiler macro binding special variable names,
breaking code that tried to write the value of a printer control variable.
(lp#581564, thanks to Stas Boukarev)
* bug fix: WRITE compiler macro did not handle output stream designators
correctly. (lp#598374, thanks to Stas Boukarev)
* bug fix: better availability of names of foreign functions in backtraces
on Linux. (lp#626962, thanks to Stas Boukarev)
* bug fix: scripting and build for Solaris and FreeBSD. (lp#615497,
lp#627581, thanks to Josh Elsasser and Jim Wise)
* bug fix: build fixes for OpenBSD -current and 4.8 (lp#615489, lp#615492,
thanks to Josh Elsasser)
* bug fix: using aliases for builtin classes as defmethod specializers
without adding DEFTYPEs for them works. (lp#618387)
* bug fix: timetravel by getrusage() no longer causes type-errors during GC.
(lp#544421)
* bug fix: legally dynamic-extent lists and vectors used as
initialization arguments to MAKE-ARRAY can be stack allocated. (lp#586105)
* bug fix: inline-expansion creating references to dead lambda-variables
(lp#454681, thanks to Alexey Dejneka)
* bug fix: better error message for bogus numerical arguments to RANDOM.
(lp#598986, thanks to Stas Boukarev)
* bug fix: the compiler occasionally inlined references from incompatible
environments occurs. (lp#308951)
* bug fix: the compiler threw an error when trying to compile a local
function (labels or flet) known to take a specialized complex argument.
(not in launchpad, reported by sykopomp in #lispgames)
* bug fix: package-locks failed to protect against compile-time effects of
DEFUN when the symbol previously had a macro definition. (lp#576637)
* bug fix: spurious ignore warnings even given (DECLARE IGNORE) in methods
when parameter bindings mutated. (reported by Faré Rideau; lp #611361)
* bug fix: workaround for compiler hang in ORDER-UVL-SETS (lp#308914)
* bug fix: evaluation in debugger REPL works using the global context when
in frames that do not have sufficient debug information.
* bug fix: exceeding FD_SETSIZE limit now results in an sensible error
(lp#316068)
* bug fix: (SETF DOCUMENTATION) of a macro works properly. (lp#643958, thanks
to Stas Boukarev)
* bug fix: interrupt taking longer than the requested period caused SLEEP
to hang on Darwin. (lp#640516, thanks to Joe Lebroco for the analysis)
changes in sbcl-1.0.42 relative to sbcl-1.0.41
* build changes
** Cross-compilation host is now specified to make.sh using
command-line argument --xc-host=<command> instead of a positional
argument. (thanks to Daniel Herring)
** Install location can be specified to make.sh using command-line
argument --prefix=<path>. (lp#550889s, thanks to Daniel Herring)
* optimization: The default implementation of
COMPUTE-DISCRIMINATING-FUNCTION does much less wasted work.
* enhancement: Explicit memory barrier operations are now available for use
by multithreaded code. See documentation for details.
* enhancement: Experimental support for threading on Linux/PPC.
* bug fix: RENAME-PACKAGE returns the package. (Thanks to Eric Marsden)
* bug fix: EXPT signals an error if first argument is a zero and second
argument is a floating point zero. (lp#571581, thanks to Roman Marynchak)
* bug fix: DEFTYPE signals an error for non-list lambda-lists.
(lp#576594, thanks to Roman Marynchak)
* bug fix: make ASDF-INSTALL compatible with the now-included ASDF2.
(lp#612998, reported by Phil Hargett; patch from Jim Wise)
changes in sbcl-1.0.41 relative to sbcl-1.0.40:
* optimization: validity of observed keyword initargs to MAKE-INSTANCE is
cached, leading to many fewer expensive calls to
COMPUTE-APPLICABLE-METHODS.
* optimization: in the (unoptimized) general method for MAKE-INSTANCE on a
CLASS argument, search for and call an appropriate optimized ctor function
if it exists.
* bug fix: WRITE always returns the correct value.
changes in sbcl-1.0.40 relative to sbcl-1.0.39:
* bug fix: readdir now works on :inode64 darwin builds (lp#592897)
* bug fix: Name conflicts between symbols passed as arguments to a single
call to IMPORT no longer add multiple symbols with the same name to the
package (detectable via DO-SYMBOLS).
* bug fix: support building without the dlshim on darwin x86 and x86-64
(lp#533470).
* bug fix: TRACE :ENCAPSULATE NIL now works on ppc/linux.
changes in sbcl-1.0.39 relative to sbcl-1.0.38:
* bug fix: Backtrace from undefined function on x86 and x86-64 now show
the calling frame.
* bug fix: linkage-table entries on PPC now no longer overflow their
space allocation (potentially causing crashes if they are written out
of order).
* bug fix: Scrub control stack after scavenging in gencgc on non-x86oid
platforms, preventing the GC from seeing stale pointers on the control
stack in subsequent GCs (which would, and does, break invariants).
* bug fix: 32-bit unicode external formats now work on big-endian systems.
* bug fix: Literal characters with code points greater than about 32767
now work on PPC UNICODE builds.
* bug fix: Any noise left by SSE operations (sqrt and conversions) in the
high order bits are explicitly cleared out. In some contrived situations,
this could lead to wrong results in mixed real/complex float arithmetic.
* bug fix: Fix function/macro redefinition warnings when building with
clisp. (lp#576787, thanks to Josh Elsasser)
* new platform: experimental support for ppc/openbsd (thanks to Josh
Elsasser).
* bug fix: Floating-point traps now work on ppc/linux.
changes in sbcl-1.0.38 relative to sbcl-1.0.37:
* incompatible change: Thread names are now restricted to SIMPLE-STRINGs
like for any other thread-related datastructure, MUTEX, etc. (lp#547095)
* deprecation: the SB-QUEUE contrib was merged into the SB-CONCURRENCY
contrib module. New code should depend on SB-CONCURRENCY, not SB-QUEUE.
* deprecation: SB-THEAD:GET-MUTEX was deprecated in favor of
SB-THREAD:GRAB-MUTEX.
* new contributed module: SB-CONCURRENCY is a new contrib; it's supposed to
contain additional data structures and tools for concurrent programming;
at the moment it contains a lock-free queue, and a lock-free mailbox
implementation.
* new feature: added SB-THREAD:GRAB-MUTEX; it's like the now deprecated
GET-MUTEX but takes &key rather than &optional parameters. Also added
:TIMEOUT argument to GRAB-MUTEX on non-sb-lutex platforms like Linux and
BSD.
* new feature: added SB-THREAD:TRY-SEMAPHORE, a non-blocking variant of
SB-THREAD:WAIT-ON-SEMAPHORE.
* new feature: SB-EXT:ATOMIC-DECF has been added as a companion to
SB-EXT:ATOMIC-INCF.
* new feature: a CANCEL-DEADLINE is associated with DEADLINE-TIMEOUT
conditions to defer the deadline for forever.
* enhancement: *STANDARD-OUTPUT*, *STANDARD-INPUT*, and *ERROR-OUTPUT* are
now bivalent.
* enhancement: errors from NO-APPLICABLE-METHOD and
NO-PRIMARY-METHOD now have a RETRY restart available to retry the
generic function call.
* enhancement: SB-BSD-SOCKET improvements
** sockets and socket streams now have a more informative printed
representation based on the corresponding SOCKET-NAME and
SOCKET-PEERNAME.
** SOCKET-MAKE-STREAM once more supports the :AUTO-CLOSE option.
(lp#540413)
** SOCKET-CLOSE now accepts :ABORT argument, which is passed on to
CL:CLOSE when appropriate, and no longer disassociates the stream
from the socket if close failed. (lp#543951)
* improvements to the instrumenting profiler
** new feature: report per-function GC overhead. (thanks to John Fremlin)
** optimization: counters no longer use locks for the overflow mode.
** bug fix: whenever a profiling counter wrapped into overflow mode, it
incurred an off-by-one miscount.
* enhancement: improved MAKE-HASH-TABLE documentation (lp#543473)
* enhancement: improved DEFMETHOD pretty-printing.
* enhancement: perform range reduction when arguments are too large for
x87's transcendentals (instead of returning 0). (lp#327192)
* enhancement: eliminate some spurious TYPE-WARNINGs. Should help with
some of CL-PPCRE's macros. (lp#570079)
* enhancement: our machine code is slightly less hostile to valgrind on
x86-64.
* enhancement: up-to-date versions of NetBSD-current are supported. (Thanks
to Robert Swindells and Aleksej Saushev)
* bug fix: correct restart text for the continuable error in MAKE-PACKAGE.
* bug fix: a rare case of startup-time page table corruption.
* bug fix: a semaphore with multiple waiters and some of them unwinding due
to timeouts could be left in an inconsistent state.
* bug fix: fix typo in "Reporting Bugs" section of the manual (lp#520366)
* bug fix: misoptimization of multiplication by one in
(SB-C::FLOAT-ACCURACY 0) policies.
* bug fix: miscounts in SB-PROFILE.
* bug fix: Fix lost wakeup bug between SB-THREAD:CONDITION-WAIT and
CONDITION-NOTIFY on Linux. See threads "lost wakeup in condition-wait /
condition-notify" (Feb 2010) and "Condition-Wait, Deadline handler, waking
up itself" (March 2010) for further details.
* bug fix: allow forward FIND and POSITION on lists to elide checking :END
against length of the list if the element is found before the specified
END is reached. (thanks to Alec Berryman, lp#554385)
* bug fix: errors signalled during package graph modification no longer
block FIND-SYMBOL and FIND-PACKAGE in other threads. (lp#511072)
* bug fix: SB-POSIX build was broken when SBCL was compiled without the
:SB-DOC feature. (lp#552564)
* bug fix: SB-INTROSPECT build issues on GENGC/PPC. (lp#490490)
* bug fix: more robust runtime executable path detection. (lp#375549)
* bug fix: GCD always returns positive values. (lp#413680)
* bug fix: Converting division to multiplication by reciprocal handles
denormals.
* bug fix: We were too eager in eliding range reduction tests on x87.
The maximal magnitude is 2^63, not 2^64.
* bug fix: Transforms for TRUNCATE don't die when the result is completely
ignored anymore.
* bug fix: Maybe restore buildability on Alpha.
* bug fix: READ-BYTE isn't inline anymore, fixing weird streams failures.
(lp#569404)
* bug fix: RANDOM-STATE can be printed readably again.
* bug fix: Unreadable objects were sometimes printed like #<\nFoo>.
* bug fix: Using EQL with non-constant values of constant type (e.g. EQL
types) could result in type mismatches during compilation.
changes in sbcl-1.0.37 relative to sbcl-1.0.36:
* enhancement: Backtrace from THROW to uncaught tag on x86oids now shows
stack frame thrown from.
* enhancement: WITH-COMPILATION-UNIT :POLICY allows restricting changes to
compiler optimization qualities inside dynamic extent of its body.
* enhancement: LOAD-LOGICAL-PATHNAME-TRANSLATIONS can be used to load
translations from SYS:SITE;<HOST>.TRANSLATIONS.NEWEST (thanks to Michael
Weber)
* optimization: SLOT-VALUE and (SETF SLOT-VALUE) take advantage of
constraint propgation, allowing better compilation eg. when used to
access structures with WITH-SLOTS. (lp#520366)
* optimization: the compiler is now more aware of the type of the underlying
storage vector for multidimensional simple arrays resulting in better code
for accessing such arrays.
* optimization: passing NIL as the environment argument to TYPEP no longer
inhibits optimizing it. (lp#309788)
* optimization: more efficient register usage when handling single-float
arguments on x86-64. (thanks to Lutz Euler)
* optimization: ADJUST-ARRAY and STABLE-SORT on vectors no longer use
pre-allocated temporary vectors. (lp#496249)
* bug fix: Fix compiler error involving MAKE-ARRAY and IF forms
in :INITIAL-CONTENTS. (lp#523612)
* bug fix: FUNCTION-LAMBDA-EXPRESSION lost declarations from interpreted
functions. (lp#524707)
* bug fix: bogus style warnings from certain (SETF SLOT-VALUE) and
WITH-SLOTS usages during compilation.
* bug fix: SB-C::CLASS-INFO now prints correctly. (lp#514762)
* enhancement: Can now build with ud2 instead of int3 as trap instruction on
all x86oid platforms with :UD2-BREAKPOINTS target feature.
* bug fix: Breakpoints now work when using ud2 instead of int3 as trap
instruction (tested on x86oid linux with ud2-breakpoints).
* bug fix: slam.sh now works on win32.
* bug fix: better differences of numeric types. (lp#309124)
* bug fix: arrays declared intersection and union types can have their
upgraded element type derived. (lp#316078)
* bug fix: SB-SPROF allocation profiling for all threads failed to profile
threads started during profiling. (lp#472499)
* bug fix: SB-INTROSPECT test failure when building without SB-EVAL feature.
(lp#535658)
* bug fix: SB-CLTL2:DECLARATION-INFORMATION did not take
SB-EXT:RESTRICT-COMPILER-POLICY into account. (lp#313337)
* bug fix: Comma inside a backquoted array or structure resulted in nonsense
values instead of signaling an error. (lp#309093)
* bug fix: Spurious unused variable warning in a DEFSTRUCT edge case.
(lp#528807)
* bug fix: More consistent warnings and notes for ignored DYNAMIC-EXTENT
declarations (lp#497321)
* bug fix: FIND and POSITION on lists did not check sequence bounds properly
and failed to detect circular lists (lp#452008)
* bug fix: leakage from ~/.asdf-install into the ASDf-INSTALL contrib build
(lp#538974)
* bug fix: LOOP OF-TYPE VECTOR compile-time error. (lp#540186)
* bug fix: SIGNAL SB-SYS:INTERACTIVE-INTERRUPT before entering the debugger
due to it, so that handlers can run.
* bug fix: reparsing undefined types if they have become defined since
parsing. (lp#309128)
* bug fix: missing &REST type in a proclamation for a function with both
&REST and &KEY in lambda-list caused miscompilation (lp#458354)
* bug fix: WHO-CALLS information for source-transformed and compiler-macro
expanded calls (lp#542174)
* bug fix: more accurate WHO-MACROEXPANDS information; point into rather
than just at toplevel form.
changes in sbcl-1.0.36 relative to sbcl-1.0.35:
* new feature: SB-EXT:TYPEXPAND-1, SB-EXT:TYPEXPAND, and
SB-EXT:TYPEXPAND-ALL behave exactly like their MACROEXPAND counterparts
but work on type specifiers.
* new feature: SB-EXT:DEFINED-TYPE-NAME-P returns whether a symbol is known
to name a type specifier.
* new feature: SB-EXT:VALID-TYPE-SPECIFIER-P returns whether a given type
specifier is valid where "valid" basically means "would be accepted as
second argument of TYPEP".
* new feature: SB-INTROSPECT:FUNCTION-TYPE takes a function-designator and
returns the function's declared, or derived FTYPE.
* new feature: SB-POSIX now supports accessing the d_ino member of
dirent structures. (Thanks to Philipp Marek and Pierre THEIRRY)
* new feature: The function SB-EXT:SEED-RANDOM-STATE has been added to
provide for seeding a RANDOM-STATE object with user-provided data or
from the operating system's PRNG. Also, (MAKE-RANDOM-STATE T) will
attempt to initialize the returned state from the operating system's
PRNG where possible. (Thanks to Fare Rideau; launchpad bug lp#310116)
* bug fix: Fix SB-SIMPLE-STREAMS:READ-VECTOR to correctly set the
FILE-POSITION of the stream being read from. (launchpad bug lp#491087)
* bug fix: Fix grammar and style issues for the docstrings of
printer-related variables and functions. (Thanks to mon_key; launchpad
bug lp#518696)
* bug fix: Fix compilation on chenygc platforms. Thanks to Larry Valkama and
Bruce O'Neel.
* bug fix: SB-THREAD:CONDITION-WAIT sometimes signaled a deadline twice
in a row even though a handler defered the deadline long into the
future. (lp#512914)
* bug fix: A deadline handler was run without interrupts enabled for a
deadline signaled within SB-THREAD:CONDITION-WAIT. That could result
in infinitely spinning, non-killable threads.
* bug fix: Backtrace from internal-errors on x86-64 os x was truncated
before reaching the erring stack frame.
* bug fix: Fix type derivation for EXPT when raising a fixnum to a
real power. (launchpad bug lp#525949)
* bug fix: Fix SB-EXT:GENERATION-* accessors for generations > 0 on
GENCGC platforms. (launchpad bug lp#529014)
* bug fix: More robust checks for invalid DEFMETHOD argument specializers.
(launchpad bug lp#525916)
* bug fix: Fix building on Darwin when sysctl is not in the user's PATH.
(Thanks to Robert Goldman)
changes in sbcl-1.0.35 relative to sbcl-1.0.34:
* optimization: ROUND with a single single-float or double-float argument
is properly inlined when possible.
* optimization: Slightly better code is generated for integer<->float
conversions and for single-float<->double-float conversions on x86-64.
* optimization: SB-ROTATE-BYTE:ROTATE-BYTE now generates more efficient
code for 32-bit and 64-bit rotations on x86-64.
* bug fix: The install script changes the ownership of directories as well
as files for contrib modules using asdf. (thanks to Eugene Ossintsev;
launchpad bug lp#508485)
* bug fix: TRUNCATE with a single single-float or double-float argument is
properly inlined when possible. (launchpad bug lp#489388)
* bug fix: Passing a rotation count of zero to SB-ROTATE-BYTE:ROTATE-BYTE
no longer causes a compiler error on x86 and ppc.
* bug fix: GET-MACRO-CHARACTER bogusly computed its second return value
always relative to *READTABLE* rather than the passed argument.
changes in sbcl-1.0.34 relative to sbcl-1.0.33:
* minor incompatible change: threading support is now enabled by default
on x86[-64] Linux.
* enhancement: SB-INTROSPECT:DEFTYPE-LAMBDA-LIST now also works on most
builtin types.
* enhancement: Errors during compile-time-too processing (i.e. EVAL-WHEN)
are now caught and reported just like errors during macroexpansion.
* enhancement: SB-POSIX now provides access to tcdrain(), tcflow(),
tcflush(), tcgetsid(), and tcsendbreak(). (thanks to Jerry James)
* enhancement: ASDF systems can now depends on SB-QUEUE.
* fixes and improvements related to Unicode and external formats:
** bug fix: error handling and restart usage in the ucs-2 external format
has been improved.
** there is now an implementation of the ucs-4 external format.
** the utf-16 and utf-32 external formats are supported.
* bug fix: SB-POSIX wrapper for putenv no longer tries to put lisp strings
in the environment. setenv() and unsetenv() are also provided. (reported by
Fare Rideau; launchpad bug lp#460455)
* bug fix: LOAD of both .fasl and .FASL type files now forces fasl-style
loading. This ensures sensible errors for .FASL files from other
implementations on case-insensitive filesystems. (reported by Willem
Broekema; launchpad bug lp#489417)
* bug fix: #p"\\\\" can now be read without error on Win32. (reported by
Willem Broekema; launchpad bug lp#489698).
* bug fix: some minor code rearrangements to reenable warning-free building
from CMUCL (reported by xme@gmx.net; launchpad bug lp#491104)
* bug fix: PRINT-OBJECT for clos instances respects the right margin when
pretty printing
* bug fix: FIND-PACKAGE & DEFPACKAGE were not thread safe. (reported by
Attila Lendvai)
changes in sbcl-1.0.33 relative to sbcl-1.0.32:
* new port: support added for x86-64 NetBSD. (thanks to Aymeric Vincent)
* improvement: support O_LARGEFILE access to files larger than 2GB on
x86-64/linux. (thanks to Daniel Janus; launchpad bug lp#453080)
* new feature: SB-INTROSPECT:WHO-SPECIALIZES-DIRECTLY to get a list of
definitions for methods specializing on the passed class itself.
* new feature: SB-INTROSPECT:WHO-SPECIALIZES-GENERALLY to get a list of
definitions for methods specializing on the passed class itself, or on
subclasses of it.
* new build flag: :sb-xref-for-internals; SBCL will collect xref information
about itself during the build (e.g. for M-? in Slime), if this flag is
enabled in customize-target-features.lisp. This will increase the core
size by about 5-6mb, though, so it's mostly interesting to SBCL
developers.
* new feature: various GENCGC tuning parameters have been experimentally
documented and exported from SB-EXT. See documentation for details.
* fixes and improvements related to Unicode and external formats:
** the Unicode character database has been upgraded to the
Unicode 5.2 standard, giving names and properties to a number of new
characters, and providing a few extra characters with case
transformations.
** improvement: restarts for providing replacement input/output on coding
errors for fd-stream external formats.
** improvement: where :<encoding> is a keyword corresponding to an
external format the system supports, it is now possible to specify
(:<encoding> :replacement <character>) as an external format which will
automatically substitute <character> on encoding or decoding errors for
streams and for STRING-TO-OCTETS and its inverse. (launchpad bug
lp#317072)
** improvement: the file streams underlying the standard streams (such as
*STANDARD-INPUT*, *TERMINAL-IO*) are opened with an external format
which uses the replacement mechanism to handle encoding errors,
preventing various infinite error chains and unrecoverable I/O
confusion.
** minor incompatible change: the utf-8 external format now correctly
refuses to encode Lisp characters in the surrogate range (char-codes
between #xd800 and #xdfff).
** fix a typo preventing conversion of strings into octet vectors
in the latin-2 encoding. (reported by Attila Lendvai; launchpad bug
lp#471689)
** fix a bug in the octet multibyte handling of decoding errors and the
USE-VALUE restart. (launchpad bug lp#314939)
** fix the bug underlying the expected failure in the FORCE-END-OF-FILE
restart on fd-stream decoding errors.
** fix a bug in the ATTEMPT-RESYNC fd-stream decoding restart when the
error is near the end of file.
** fix a double-error case in unibyte octet conversions, when the first
use of USE-VALUE is ignored.
** fix bugs in handling of undefined code points in unibyte encodings.
** fix LISTEN (and consequent hangs in READ-CHAR-NO-HANG) on bivalent
streams after an UNREAD-CHAR.
* enhancement: SB-INTROSPECT:ALLOCATION-INFORMATION also reports if the
object is allocated in a boxed region of dynamic space.
* enhancement: SB-POSIX:FORK now signals an error if an attempt to
fork with multiple Lisp threads running is made, instead of going
ahead with unpredictable consequences. (reported by Leslie Polzer)
* bug fix: uses of slot accessors on specialized method parameters within
the bodies of SLOT-VALUE-USING-CLASS methods no longer triggers a type
error while finalizing the class. This fix may cause classes with slot
accessors to be finalized later than previously. (reported by Lars Rune
Nøstdal; launchpad bug lp#473699)
* bug fix: restore buildability on the MIPS platform. (regression from
1.0.30.38, reported by Samium Gromoff)
* bug fix: inspecting closures is less likely to fail with a type error.
* bug fix: no timer starvation when setting the system clock back.
(launchpad bug lp#460283)
* bug fix: WITH-STANDARD-IO-SYNTAX now binds *PRINT-PPRINT-DISPATCH* to the
standard pprint dispatch table as specified by CLHS.
* bug fix: give CLISP a hint about a type declaration to enable it to build
the cross-compiler without warnings. (thanks to Josh Elasser; launchpad
bug lp#396597)
* bug fix: correctly dump literal objects in defaulting forms of arglists.
(reported by Attila Lendvai; launchpad bug lp#310132)
* bug fix: distinguish in type specifiers between arrays that might be
complex and arrays that are definitely complex. (launchpad bug lp#309129)
* bug fix: SUBTYPEP knows that the SYMBOL type is not SUBTYPEP the KEYWORD
type. (reported by Levente Mészáros; launchpad bug lp#485972)
* bug fix: setting the value of a symbol-macro within a method in the
presence of type declarations works properly again. (reported by Iban
Hatchondo; launchpad bug lp#485019)
changes in sbcl-1.0.32 relative to sbcl-1.0.31:
* optimization: faster FIND and POSITION on strings of unknown element type
in high SPEED policies. (thanks to Karol Swietlicki)
* optimization: faster CONCATENATE 'STRING in low SPEED policies (reported
by David Vázquez)
* improvement: better error signalling for bogus parameter specializer names
in DEFMETHOD forms (reported by Pluijzer)
* bug fix: DELETE-FILE once again works on logical pathnames (regression
since 1.0.30.49)
* bug fix: LOGICAL-PATHNAME signals a TYPE-ERROR if pathspec is specified
incorrectly.
* bug fix: redefinition of a class via DEFCLASS without :DEFAULT-INITARGS
removes previous default initargs (reported by Lars Rune Nøstdal and
Samium Gromoff)
* bug fix: correct WHO-CALLS information for inlined lambdas with complex
lambda-lists. (reported by Peter Seibel)
* bug fix: SAVE-LISP-AND-DIE option :SAVE-RUNTIME-OPTIONS did not work
correctly when starting from an executable core without saved runtime
options (reported by Faré Rideau, thanks to Zach Beane)
* bug fix: (SETF SLOT-VALUE) signalled a warning which should have been
an optimization note instead. (reported by Martin Cracauer)
* bug fix: WITH-SLOTS did not work with THE forms. (thanks to David Tolpin)
* bug fix: Have RUN-PROGRAM with :INPUT T only run the subprocess in a
new process group if it doesn't need to share stdin with the sbcl
process. (thanks to Leslie Polzer)
* bug fix: SATISFIES could be misoptimized to refer to a local function.
(reported by Stanislaw Halik)
changes in sbcl-1.0.31 relative to sbcl-1.0.30:
* improvement: stack allocation is should now be possible in all nested
inlining cases: failure to stack allocate when equivalent code is manually
open coded is now considered a bug.
* improvements related to Unicode:
** the Unicode character database has been upgraded to the
Unicode 5.1 standard, giving names and properties to a number of new
characters, and providing a few extra characters with case
transformations.
** the system now recognizes and produces names for Unicode Hangul
syllable characters.
** the EBCDIC-US external-format is now supported for octet operations
(as well as for stream operations).
* new feature: experimental :EMIT-CFASL parameter to COMPILE-FILE can
be used to output toplevel compile-time effects into a separate .CFASL
file.
* optimization: COERCE to VECTOR, STRING, SIMPLE-STRING and recognizable
one-dimenstional subtypes of ARRAY is upto 70% faster when the coercion is
actually needed.
* optimization: TRUNCATE on known single- and double-floats is upto 25%
faster.
* optimization: division of floating point numbers by constants uses
multiplication by reciprocal when an exact reciprocal exists.
* optimization: multiplication of single- and double-floats floats by
constant two has been optimized.
* optimization: ARRAY-IN-BOUNDS-P is resolved at compile-time when
sufficient type information is available. (thanks to Leslie Polzer)
* optimization: SLOT-VALUE and (SETF SLOT-VALUE) with constant slot names on
known structure objects are as efficient as defstruct generated accessors.
* optimization: unused vector creation can now be optimized away.
* improvement: ASDF systems can now depends on SB-INTROSPECT.
* improvement: a STYLE-WARNING is signalled when a generic function
clobbers an earlier FTYPE proclamation.
* improvement: the compiler is able to track the effective type of
generic function across method addition and removal even in the
absence of an explicit DEFGENERIC.
* improvement: DESCRIBE now reports on symbols naming undefined
but assumed or declared function as well.
* improvement: recompilation of systems using SB-GROVEL now works
(thanks to Leslie Polzer)
* improvements to SB-CLTL2 (thanks to Larry D'Anna):
** functions DECLARATION-INFORMATION, PARSE-MACRO, and ENCLOSE have been
documented.
** AUGMENT-ENVIRONMENT and DEFINE-DECLARATION have been implemented.
** DECLARATION-INFORMATION now supports declaration name DECLARATION as
well as user defined declaration names.
** VARIABLE-INFORMATION is now aware of alien variables.
* improvement: improved address space layout on OpenBSD (thanks to Josh
Elsasser)
* improvement: pretty-printing of various Lisp forms has been improved
(thanks to Tobias Rittweiler)
* bug fix: calls to DECODE-FLOAT and INTEGER-DECODE-FLOAT whose value was
unused were deleted in safe code. (reported by John Fremlin)
* bug fix: a failing AVER compiling certain MAKE-ARRAY forms. (reported
by James Wright)
* bug fix: some out-of-line array predicates were missing (reported by
Stelian Ionescu)
* bug fix: a failing AVER in CONVERT-MV-CALL has been fixed. (thanks to
Larry D'Anna)
* bug fix: a failing AVER in %ALLOCATE-CLOSURES conversion has been fixed
(thanks to Larry D'Anna)
* bug fix: SLEEP supports times over 100 million seconds on long on OpenBSD
as well. (reported by Josh Elsasser)
* bug fix: DELETE-FILE on streams no longer closes the stream with :ABORT T,
leading to possible attempts to delete the same file twice. See docstring
on DELETE-FILE for details. (reported by John Fremlin)
* bug fix: DELETE-FILE once again deletes the file named by the pathname
designator argument, rather than its truename. (reported by Luis
Oliveira)
* bug fix: the low-level debugger had 32-bit assumptions and was missing
information about some array types. (thanks to Luis Oliveira)
* bug fix: moderately complex combinations of inline expansions could
be miscompiled if the result was declared to be dynamic extent.
* bug fix: on x86, SAP-REF of sizes greater than 8 bits with offsets of the
form (+ <variable> <integer>) were miscompiled under certain
circumstances.
* bug fix: in some cases no compiler note about failure to stack allocate
was emitted, even if the objects were in fact heap allocated.
* bug fix: minor violation of "otherwise inaccessible" rule for stack
allocation could cause objects users might reasonably expect to
be heap allocated to be stack allocated.
* bug fix: DESCRIBE signalled an error for generic functions under
certain circumstances. (thanks to Leslie Polzer)
* bug fix: Fixed spelling of an error message.
changes in sbcl-1.0.30 relative to sbcl-1.0.29:
* minor incompatible change: SB-THREAD:JOIN-THREAD-ERROR-THREAD and
SB-THREAD:INTERRUPT-THREAD-ERROR-THREAD have been deprecated in favor
of SB-THREAD:THREAD-ERROR-THREAD.
* new contrib module: SB-QUEUE provides thread-safe lockless FIFO queues.
* new feature: docstrings for local and anonymous functions are no longer
discarded. (thanks to Leslie Polzer)
* new feature: SB-THREAD:SYMBOL-VALUE-IN-THREAD provides access to symbol
values in other threads.
* new feature: SB-INTROSPECT:ALLOCATION-INFORMATION provides information
about object allocation.
* optimization: division of a real float by a complex float is implemented
with a specialised code sequence.
* optimization: MAKE-INSTANCE with non-constant class-argument but constant
keywords is an order of magnitude faster.
* optimization: MAKE-INSTANCE with constant keyword arguments is x2-4 faster
in the presence of :AROUND or non-standard primary INITIALIZE-INSTANCE
methods, and similarly for non-standard metaclass classes as long as there
are no methods additional on MAKE-INSTANCE.
* optimization: more efficient type-checks for FIXNUMs when the value
is known to be a signed word on x86 and x86-64.
* optimization: compiler now optimizes (EXPT -1 INTEGER), (EXPT -1.0 INTEGER),
and (EXPT -1.0d0 INTEGER) into an ODDP test. (thanks to Stas Boukarev and
Paul Khuong)
* optimization: compiler is smarter about delegating argument type checks to
callees.
* optimization: several character functions are now compiled somewhat more
efficiently. (reported by Lynn Quam)
* optimization: the compiler now derives simple types for LOAD-VALUE-FORMs.
* improvement: less unsafe constant folding in floating point arithmetic,
especially for mixed complex/real -float operations.
* optimization: constant double and single floats are stored in native
unboxed format on x86[-64].
* optimization: smarter code for arithmetic operations with constant floats,
complex floats, or integers on x86[-64].
* optimization: smarter code for conjugate/multiplication of float complexes
and abs/negate of floats on x86-64.
* optimization: more efficient complex float and real float operations on
x86-64.
* improvement: complex float division is slightly more stable.
* improvement: DESCRIBE output has been reworked to be easier to read and
contains more pertinent information.
* improvement: failure to provide requested stack allocation compiler notes
provided in all cases (requested stack allocation not happening without a
note being issued is now considered a bug.)
* bug fix: SB-POSIX exports the documented types and functions
FILE-DESCRIPTOR and FILENAME, and also the corresponding -DESCRIPTOR
types. (reported by "abhi")
* bug fix: on 64 bit platforms FILL worked incorrectly on arrays with
upgraded element type (COMPLEX SINGLE-FLOAT), regression from 1.0.28.55.
(thanks to Paul Khuong)
* bug fix: looping around HANDLER-CASE could silently consume stack space
on each iteration. (reported by "foobar")
* bug fix: better error signalling when calls to functions seeking elements
from lists (eg. ADJOIN) are compiled with both :TEST and :TEST-NOT.
(reported by Tobias Rittweiler)
* bug fix: regressions in DIRECTORY from 1.0.28.61: pattern matching of
directory components now works as it used to. (various prolems reported by
Michael Becker, Gabriel Dos Reis, Cyrus Harmon, and Harald Hanche-Olsen)
* bug fix: :PTY option in RUN-PROGRAM was broken with stream arguments.
(reported by Elliot Slaughter, thanks to Stas Boukarev)
* bug fix: bogus undefined variable warnings from fopcompiled references to
global variables. (thanks to Lars Rune Nøstdal)
* bug fix: foreign function names should now appear in backtraces on
FC6 as well. (reported by Tomasz Skutnik and Tobias Rautenkranz)
* bug fix: SETF compiler macro documentation strings are not discarded
anymore.
* bug fix: GENTEMP is now unaffected by pretty printer dispatch table.
(thanks to Alex Plotnick)
* bug fix: SLEEP accepts large integer arguments, truncating them to
SIGNED-WORD on the assumption that sleeping for 68 years is sufficient
for anyone. (reported by Leslie Polzer, thanks to Stas Boukarev)
* bug fix: compiler notes for expensive slot type checks could be emitted
at runtime MAKE-INSTANCE calls. (reported by Samium Gromoff)
changes in sbcl-1.0.29 relative to 1.0.28:
* IMPORTANT: bug database has moved from the BUGS file to Launchpad
https://bugs.launchpad.net/sbcl
Bugs can be reported directly there, or by sending email to
sbcl-bugs@lists.sourceforge.net
(no subscription required.)
* minor incompatible change: under weak type checking policy integer
types are weakened less aggressively.
* minor incompatible change: SAVE-LISP-AND-DIE :TOPLEVEL function is now
allowed to return, which causes SBCL to quit with exit status 0. Previously
if the function returned with a small integer return value, that value
was accidentally reused as the exit status.
* new feature: SB-EXT:DEFINE-HASH-TABLE-TEST allows defining new arguments
to MAKE-HASH-TABLE :TEST, and MAKE-HASH-TABLE has been extended with
:HASH-FUNCTION argument. Refer to user manual for details.
* new feature: SB-EXT:DEFGLOBAL macro allows defining global non-special
variables.
* new feature: SB-EXT:GET-TIME-OF-DAY provides access to seconds and
microseconds since the Unix epoch on all platforms.
* new feature: SB-EXT:ALWAYS-BOUND proclamation inhibits MAKUNBOUND, and
allows the compiler to safely elide boundedness checks for special
variables.
* new feature: SB-EXT:GLOBAL proclamation inhibits SPECIAL proclamations for
the symbol, prohibits both lexical and dynamic binding. This is mainly an
efficiency measure for threaded platforms, but also valueable in
expressing intent.
* new feature: UNC pathnames are now understood by the system on Windows.
* optimization: the compiler uses a specialized version of FILL when the
element type is know in more cases, making eg. (UNSIGNED-BYTE 8) case
almost 90% faster.
* optimization: accesses to potentially non-simple arrays where element type
is known are 50% faster.
* optimization: compiler now generates faster array typechecking code.
* optimization: ARRAY-DIMENSION is now faster for multidimensional and
non-simple arrays.
* optimization: multidimensional array accesses in the absence of type
information regarding array rank are approximately 10% faster due to
open coding of ARRAY-RANK.
* optimization: result of (FILL (MAKE-ARRAY ...) ...) and (REPLACE
(MAKE-ARRAY ...) ...) can be stack allocated if the result of MAKE-ARRAY
form can be.
* optimization: result of call to VECTOR can now be stack allocated.
* optimization: MAKE-ARRAY with :INITIAL-CONTENTS is now vastly faster
as long as the resulting array is one-dimensional and has a known
element type. In particular, :INITIAL-CONTENTS (LIST ...) where the
length of the list matches the known length of the vector does not
allocate the list as an intermediate step. Ditto for VECTOR and simple
backquoted forms.
* optimization: MAKE-ARRAY can now stack allocate in the presence of
:INITIAL-CONTENTS and :INITIAL-ELEMENT as long as the result has a
known element type, and is known to be simple and one dimensional.
* improvement: SBCL now emits a compiler note where stack allocation was
requested but could not be provided (not in all cases, unfortunately)
* improvement: better MACHINE-VERSION responses. (thanks to Josh Elsasser)
* improvement: pretty-printing loop has been implemented properly. (thanks
to Tobias Rittweiler)
* documentation: CLOS slot typechecing policy has been documented.
* bug fix: FILE-AUTHOR no longer signals an error on Windows.
* bug fix: SB-SPROF could be foiled by foreign code not have a frame
pointer, leading to memory faults. (thanks to Bart Botta)
* bug fix: better floating point exception handling on x86/OpenBSD.
(thanks to Josh Elsasser)
* bug fix: exit status from QUIT when called under --script was lost
(reported by Hubert Kauker)
* bug fix: MAKE-ARRAY for non-zero :INITIAL-ELEMENT always used the
same implementation of FILL to initialize the array, even if a more
efficient one was available (reported by Stas Boukarev, thanks to
Paul Khuong)
* bug fix: potential miscompilation of array stack allocation on x86 and
x86-64. (reported by Time Tossavainen)
* bug fix: some forms of AND, OR, and COND resulted in expansions that could
result in their subforms being treated as top level forms. (reported by
James Knight)
* bug fix: On x86/x86-64 alien functions declared to return integers shorter
than a machine register could leave garbage in the high bits of the
result register (bug 316325).
* bug fix: disable address space randomization Linux/x86-64 as well,
not just x86-64. (reported by Ken Olum)
* bug fix: Attempting to DEREF an (ALIEN (* T)) would produce a WARNING and
generate incorrect code.
* bug fix: #201; type inference for CONS and ARRAY types could derive
wrong results in the presence of eg. RPLACA or ADJUST-ARRAY.
* bug fix: special variables with a proclaimed specific subtype of FUNCTION
could not be assigned to or bound with PROGV. (reported by Lorenz
Mösenlechner)
* bug fix: the value of CL:- in the inspector was the previous expression
evaluated rather than the expression being evaluated.
* bug fix: constants can no longer be locally declared special.
* bug fix: signals delivered to threads started from foreign land (read:
directly by pthread_create, not by MAKE-THREAD) are redirected to a Lisp
thread by blocking all signals and resignalling.
* bug fix: SHARED-INITIALIZE initialized unbound :ALLOCATION :CLASS slots
from :INITFORM, if any.
changes in sbcl-1.0.28 relative to 1.0.27:
* a number of bugs in cross-compilation have been fixed, with the ultimate
result that building under (at least) clisp should be much more reliable.
* minor incompatible changes: echo-streams now propagate unread-char to the
underlying input stream, and no longer permit unreading more than one
character.
* improvement: on x86/x86-64 Lisp call frames now have the same layout as C
frames, allowing for instance more reliable backtraces.
* improvement: the debugger REPL can now reference lexical variables
by name directly for code compiled with (DEBUG 3).
* improvement: errors from malformed declarations now have better source
paths associated with them. (thanks to Tobias Rittweiler)
* optimization: faster local calls on x86/x86-64
* bug fix: some error messages for out-of-bound array indexes confused the
index and the bound. (thanks to Stas Boukarev)
* bug fix: pretty printing malformed DEFPACKAGE forms (thanks to Sidney
Markowitz)
* bug fix: running regressions tests in shells without OSTYPE set now works.
(reported by Harald Hanche-Olsen)
* bug fix: more robust static space exhaustion signalling from
MAKE-STATIC-VECTOR (thanks to Daniel Lowe)
* bug fix: (SETF DOCUMENTATION) for anonymous function now throws the
docstring away instead of storing it under names such as (LAMBDA (X)).
(reported by Leslie Polzer)
* bug fix: timers could go off in the wrong order, be delayed indefinitely
(thanks to Ole Arndt for the patch)
* bug fix: RESTART-FRAME and RETURN-FROM-FRAME stack corruption
* bug fix: the discriminating function for PRINT-OBJECT no longer preserves
potentially-invalid effective methods in its cache.
* bug fix: SB-INTROSPECT:FIND-DEFINITION-SOURCE now works with funcallable
instances as well (thanks to Paul Khuong)
* bug fix: using RUN-PROGRAM does not interfere with SB-POSIX:WAIT,
SB-POSIX:WAITPID and their C equivalents.
* bug fix: RUN-PROGRAM does not crash on Darwin when stressed.
changes in sbcl-1.0.27 relative to 1.0.26:
* new port: support added for x86-64 OpenBSD. (thanks to Josh Elsasser)
* new port: support added for x86-64 Solaris. (thanks to Alex Viskovatoff)
* improvement: the system either recovers from stack exhaustion or dies
properly as opposed to leaving the user uncertain of whether the handler
trampled on some random memory next to the stack or having to rely on
--lose-on-corruption (which is still a good idea to use in production
because stack exhaustion can happen in signal handlers which will likely
lead to hangs.)
* bug fix: fix gc related interrupt handling bug on ppc (regression from
1.0.25.37, reported by Harald Hanche-Olsen)
* bug fix: work around signal delivery bug in darwin (regression from
1.0.25.44, reported by Sidney Markowitz)
* bug fix: fix ERROR leaking memory (reported by David Thompson)
changes in sbcl-1.0.26 relative to 1.0.25:
* incompatible change: an interruption (be it a function passed to
INTERRUPT-THREAD or a timer function) runs in an environment where
interrupts can be enabled. The interruption can use
WITH-INTERRUPTS or WITHOUT-INTERRUPTS as it sees fit. Use
WITHOUT-INTERRUPTS to avoid nesting of interruptions and
potentially running out of stack. Keep in mind that in the absence
of WITHOUT-INTERRUPTS some potentially blocking operation such as
acquiring a lock can enable interrupts.
* incompatible change: GC-OFF and GC-ON are removed, as they were
always unsafe. Use WITHOUT-GCING instead.
* new feature: runtime option --disable-ldb
* new feature: runtime option --lose-on-corruption to die at the
slightest hint of possibly non-recoverable errors: running out of
memory, stack, alien stack, binding stack, encountering a memory
fault, etc. In the absence of --lose-on-corruption a warning is
printed to stderr.
* enhancement: detect binding stack exhaustion
* enhancement: detect alien stack exhaustion on x86/x86-64
* improvement: generally more stable and reliable interrupt handling
* improvement: there is a per thread interruption queue,
interruptions are executed in order of arrival
* improvement: a repeating timer reschedules itself when the it has
finished, but expiration times are spaced equally. If an
expiration time is in the past it will trigger after a short grace
period that may give a chance to other things to run.
* optimization: slightly faster gc on multithreaded builds
* optimization: faster WITHOUT-GCING
* bug fix: when JOIN-THREAD signals an error, do it when not holding
important locks so that the debugger/handler doesn't produce
recursive errors or deadlock.
* bug fix: real-time signals are not used anymore, so no more
hanging when the system wide real-time signal queue gets full.
* bug fix: INTERRUPT-THREAD on a dying thread could produce memory
fault.
* bug fix: finalizers, gc hooks never run in a WITHOUT-INTERRUPTS
* bug fix: fix random memory faults related to interrupts on alpha
* bug fix: fix random memory faults related to interrupts on sparc
* bug fix: fix deadlocks related to starting threads
* bug fix: fix deadlines on locks on futex platforms
* bug fix: restore errno in signal handlers
* bug fix: fix deadlocks related to hash tables
* bug fix: fix deadlocks in pcl
changes in sbcl-1.0.25 relative to 1.0.24:
* incompatible change: SB-INTROSPECT:FUNCTION-ARGLIST is deprecated, to be
removed later. Please use SB-INTROSPECT:FUNCTION-LAMBDA-LIST instead.
* new feature: SB-INTROSPECT:DEFTYPE-LAMBDA-LIST allows retrieval of
DEFTYPE lambda lists. (thanks to Tobias Rittweiler)
* enhancement: MUTEX-VALUE is to be superseded by MUTEX-OWNER that has a
better name and does not return values so stale on multiprocessor systems.
Also, HOLDING-MUTEX-P was added for about the only sane usage of
MUTEX-OWNER.
* improvement: unithread builds keep track of MUTEX-VALUE.
* improvement: reading from a TWO-WAY-STREAM does not touch the output
stream anymore making it thread safe to have a concurrent reader and
a writer, for instance, in a pipe.
* improvement: GET-SETF-EXPANDER avoids adding bindings for constant
arguments, making compiler-macros for SETF-functions able to inspect
their constant arguments.
* improvement: COMPILE-FILE reports times with millisecond accuracy
(thanks to Luis Oliveira)
* optimization: CHAR-CODE type derivation has been improved, making
TYPEP elimination on subtypes of CHARACTER work better. (reported
by Tobias Rittweiler, patch by Paul Khuong)
* bug fix: setting alien structure fields of type struct by value now
computes the right offset for the memory copy.
* bug fix: compilation problem involving inlined calls to aliens with
result type VOID. (reported by Ken Olum)
* bug fix: #235a; sequential inline expasion in different policies no
longer reuses the functional from the previous expansion site.
* bug fix: DEFTYPE no longer breaks on bodies consisting of a single
unquoted symbol. Regression from 1.0.22.8. (reported by Ariel Badichi)
* bug fix: named ENUMs in multiply-referenced alien record types no longer
cause an implied type redefinition. Regression from 1.0.21.29.
* bug fix: sign-extension of small signed return values now works with C
code compiled with gcc 4.3 or newer. (reported by Liam Healy)
* improvements to the Windows port:
** SB-BSD-SOCKETS now works from saved cores as well. (reported by Stephen
Westfold, thanks to Rudi Schlatte)
changes in sbcl-1.0.24 relative to 1.0.23:
* new feature: ARRAY-STORAGE-VECTOR provides access to the underlying data
vector of a multidimensional SIMPLE-ARRAY.
* new feature: the system now signals a continuable error if standard
readtable modification is attempted. (thanks to Tobias Rittweiler)
* new feature: DIRECTORY has been extended with a non-standard keyword
argument :RESOLVE-SYMLINKS. (thanks to TC-Rucho)
* enhancement: SB-BSD-SOCKETS:MAKE-SOCKET-STREAM keyword argument handling
has been robustified and documented better. (thanks to Robert Goldman)
* optimization: faster generic arithmetic dispatch on x86 and x86-64.
* optimization: FORMAT ~D and ~F are now approximately 5% faster.
* tradeoff: constant FORMAT control strings are now compiled unless
SPACE > SPEED (previously only when SPEED > SPACE.)
* bug fix: Red Hat Enterprise 3 mmap randomization workaround. (thanks
to Thomas Burdick)
* bug fix: DEFCLASS and ENSURE-CLASS-USING-CLASS are now expected to
be thread safe.
* bug fix: lexical type declarations are now correctly reported by
SB-CLTL2. (reported by Larry D'Anna)
* bug fix: STRING-TO-OCTETS did not handle :START properly when
using UTF-8 as external format. (thanks to Luis Oliveira)
* bug fix: errors from invalid fill-pointer values to (SETF FILL-POINTER)
are signalled correctly. (thanks to Stas Boukarev)
* bug fix: SET-MACRO-CHARACTER accepts NIL as the readtable
designator. (thanks to Tobias Rittweiler)
* bug fix: SET-DISPATCH-MACRO-CHARACTER accepts NIL as the readtable
designator, and returns T instead of the function. (thanks to