B-C
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5.8, 5.6 and earlier had a good core perl compiler, but we are much better.
Still missing in general are:
- attribute handlers (i.e. run-time attributes)
- smartmatch subrefs
- compile-time stash-magic delete renames to ANON
- p5p Carp >= 1.42 die recursion
B::C is stable and used in production for -O0 and -O3 until 5.24.x
5.26.0 broke Carp, you should use cperl then.
For bigger programs not all methods in certain packages or eval strings
might be detected, you'd need to add them manually via
-u<packagename>.
B::CC is very unstable, work is in progress. Certain alioth benchmarks
are 6x faster. Recursive function calls and certain dynamic ops are
not yet supported.
The Bytecode compiler is only stable for >=5.8.
The CPAN Bytecode compiler is disabled for 5.6, we keep the old.
The old core compiler fails for 50% of the testcases.
Windows and other OS with strict linking <5.16 will fail to install due to some
not exported libperl symbols. Looks at the patches in ramblings or use cperl,
which includes the compilers.
Security:
The latest released compiler version is only recommended up to 5.14.4 or cperl.
Newer perl versions do work, but 5.16-5.30 upstream are too insecure
to be recommended for production.
5.20 finally properly handles unicode names, but identifiers and package
names are still handled as binary blobs, which could lead to TR39 issues.
Check your code automatically (not manually, because new identifiers
are not identifiable anymore) for syntax spoofs, confusables, strip
\\0 from package names and enable use warnings 'syscalls'.
See http://websec.github.io/unicode-security-guide/
cperl since 5.26 fixed all the known issues.
C and CC: Same ok and less failures as with 5.6, 5.8 and 5.9.4.
In 5.8.8 and 5.8.9 we have much less errors in the testsuite for the
new CPAN compiler and the CORE compiler. See below.
Most B::C and B::CC bugs fixed.
Compatibility added for all major releases since 5.6.2
Open Problems for B::C:
See github issues.
See below at the detailed status of the major releases.
TEST STATUS
-----------
Regularily tested with every cperl update, since it is in core there.
Regularily tested on cygwin1.7, darwin 64bit intel, centos5, centos6, centos7,
debian5, debian6, freebsd7, freebsd8, solaris10/intel sunpro, openbsd49, netbsd.
With the respective default gcc and clang compilers, with the latest address-sanitizer
versions.
Not so regurarily on darwin 10.4/ppc, strawberry-5.10.1, strawberry-5.12.2,
strawberry-5.14, strawberry-5.16 and activeperl-5.10.1/msvc8
List of failed tests:
CORE (old)
----
5.6.2:
t/bytecode 3,6,8..10,12,15,16,18,28,31,35,38,39
t/c 8,15,16,22,27,28,31 | 27 worked in 5.6.2!
t/c_o1 8,15,16,22,27,28,31
t/c_o2 8,15,16,22,27,28,31
t/cc 15,18,21,25,27,28,30..32
t/cc_o1 15,18,21,25,27,28,30..32
t/cc_o2 10,15,16,18,21,25,26,27,28,30..32
5.8: | non-threaded
t/bytecode 27,44,33,39
t/c 11,14,15,20,23,27..29,31,101,102 | 5,7-12,14-20,22-23,25,27,28,30,31
t/c_o1 1,3-8,10..12,14,15,17..25,27..29,31,101,102| 7-12,14-20,22-23,25,27,28,30,31
t/c_o2 1,3-12,14,15,17..25,27..29,31,101,102 | 7-12,14-20,22-23,25,27,28,30,31
t/cc 7,11,14,15,18..21,23..25,28..32,101..103
t/cc_o1 7,11,14,15,18..21,23..32,101..103
t/cc_o2 7,10,11,14..16,18-21,23..32,101..103
Recipe:
p=perl5.6.2
t/testc.sh -q -c
for t in $(seq -f"%02.0f" 32); do rm ccode 2>/dev/null; $p -MO=C,-occode.c ccode$t.pl 2>/dev/null && $p script/cc_harness ccode.c -o ccode >/dev/null; echo -n "$t: "; $p ccode$t.pl; echo -n " => "; ./ccode; echo; done
p=perl5.8.9
for t in $(seq -f"%02.0f" 35); do rm ccode 2>/dev/null; $p -MO=C,-occode.c ccode$t.pl 2>/dev/null && $p script/cc_harness -Bstatic ccode.c -o ccode >/dev/null; echo -n "$t: "; $p ccode$t.pl; echo -n " => "; ./ccode; echo; done
p=perl5.8.9d-nt
for t in $(seq -f"%02.0f" 35); do rm ccode 2>/dev/null; $p -MO=C,-occode.c ccode$t.pl 2>/dev/null && $p script/cc_harness -Bdynamic ccode.c -o ccode >/dev/null; echo -n "$t: "; $p ccode$t.pl; echo -n " => "; ./ccode; echo; done
B::C (new)
Fix CC
several other issues detected (and mostly fixed) by Heinz Knutzen
minimize pad copies from local to pad
label not defined (utf8::SWASHNEW)
-faelem is fast but still a bit unstable
DONE
----
fixed with 1.48:
bytecode compiler for >=5.18
C/CC walker, dumping all external, non compiler added packages properly
and detecting required compiler added packages also.
RTLD_NOLOAD on BSD for run-time remapping of .so syms
Moose XS init
fixed with 1.47:
run-time remapping of .so syms with special support by Encode-2.58
fix %INC cleanup
non-const %warnings::Bits with -O3
lexical subs threaded
Coro
some readonly related problems: re-eval, hashes
byteloader binmode for 5.18
mro and maybe::next
fixed with 1.46:
global destruction of our and global objects
utf8 qr and utf8 /i initialization with -fppaddr
@-
lexical warnings on 5.8
-O4 CvSTART cops
mro: c3 and maybe|next:: method calls
Encode dlsym patching of compile-time XS handles (Net::DNS, IO::Socket::SSL)
$/, $@ and $\, esp. when localized
dump all used @ISA's
GvFORM pseudo CVs (B::FM) on 5.10
__DATA__ blocks in packages without printing wrong warnings
Replace each %hash with foreach sort keys (no random misses of functions)
fixed with 1.44:
SvLEN and PV ptr for empty shared hash keys
cop_hints to support lexical numeric hints pragmas (use bytes, use open, ...)
-O3 with ~ and ~~ formatstrings
skip saving a cv on defined(&cv)
format STDOUT/STDERR
Save empty bodyless subs if they exist, for signal handlers, prototypes declarations
and cvrefs
PVMG PV overwriting the RV, overload sub
fixed with 1.43:
static strings and heks with LEN=0
restore of many more dynamic magic variables: @+,@-,$$,${^UNICODE} ${^UTF8LOCALE}
$; $\ $, $/ $" $| $^A $^L $: $% $- $= $^H $^R
and allow other GP entries for ENV, ARGV, ...
do not set newGP for symbols, thus do not disturb pre-initialization, esp. XS CVs
do not boot internal core XS packages twice
better load-order for dynaloaded modules, which helps esp. on windows
improved deeper walker, detect more missing empty packages
HvAUX init without magic (iterators)
new PADLIST type
unicode and binary strings and heks
COW support
proper len of QR refs
stash symtab magic for PMf_ONCE m?? and reset
lexwarns
(See Changes for all fixes)
fixed with 1.42:
my_share_hek (global destruction)
Turn off CvDYNFILE
save @ISA of empty child classes
fixed with 1.40:
static PerlIO Layers
synced %INC
defer eval section after dl_init
fixed with 1.39:
improved eval AUTOLOAD
fixed with 1.37:
fixed wrong test 46, test for Exporter STASH in *main:: STASH
copy-on-grow with LEN=0 and FAKE clash with share_hek
share_hek re-implemented
init of READONLY hash keys
re-hash everything at startup (oCERT-2011-003)
find UNIVERSAL methods, load SelectSaver with IO
hv_clear_placeholders
%+, %-, %!
%SIG
magic->PTR when SV (>5.6)
attributes::reftype
inc_cleanup (partially)
CV prototypes (>5.10)
ignore aelemfast SPECIAL pads (5.8.[45])
strip version object overload from XS packages (i91)
restore stdio handles from BEGIN blocks (Test::NoWarnings)
B::COP::stashflags (>5.15.4)
lost PL_regex_pad, (5.15 threaded)
fixed with 1.36:
5.15 XSLoader and hash init
support lexical warnings
better __DATA__ detection and support,
still IO::File not IO::Scalar handle though
fixed test 29 mostly (use IO)
fixed with 1.35:
improve package_pv detection for methods,
detect previously missing packages within the main source file
run-time %ENV
fixed with 1.32:
improved scanner, try_isa, mark_package force, ...
do not gp_free shared GPs
Internals::V
dl_init of cached deleted packages
fixed with 1.30:
cc_queue sort 18 ccpp
dl_init regression
( run in 1.104 second using v1.01-cache-2.11-cpan-39bf76dae61 )