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[perl #118305] dtrace sub-entry probe against lexical sub segfaults
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From:
Ricardo SIGNES
Date:
June 4, 2013 18:49
Subject:
[perl #118305] dtrace sub-entry probe against lexical sub segfaults
Message ID:
rt-3.6.HEAD-2552-1370371718-125.118305-75-0@perl.org
# New Ticket Created by Ricardo SIGNES
# Please include the string: [perl #118305]
# in the subject line of all future correspondence about this issue.
# <URL: https://rt.perl.org:443/rt3/Ticket/Display.html?id=118305 >
This is a bug report for perl from rjbs@cpan.org,
generated with the help of perlbug 1.39 running under perl 5.19.1.
-----------------------------------------------------------------
[Please describe your issue here]
I have compiled blead (929c6ecf) -Dusedtrace and run:
./perl -Ilib -E 'use feature "lexical_subs"; my sub x { say 1 }
while (1) { sleep 1; x; }'
This starts emitting a slow steady stream of ones. It is just fine.
After a while, I run:
sudo dtrace -Zn 'perl::sub-entry /execname == "perl"/ { }'
dtrace: description 'perl::sub-entry ' matched 4 probes
The original perl program segfaults within a second.
[Please do not change anything below this line]
-----------------------------------------------------------------
---
Flags:
category=core
severity=medium
---
Site configuration information for perl 5.19.1:
Configured by rjbs at Tue Jun 4 13:37:13 CDT 2013.
Summary of my perl5 (revision 5 version 19 subversion 1) configuration:
Commit id: 929c6ecf94db1e29600848f3d1acc64c825d9fc7
Platform:
osname=darwin, osvers=12.3.0, archname=darwin-2level
uname='darwin walrus.local 12.3.0 darwin kernel version 12.3.0: sun jan 6 22:37:10 pst 2013; root:xnu-2050.22.13~1release_x86_64 x86_64 '
config_args='-des -Dusedevel -Dusedtrace'
hint=previous, useposix=true, d_sigaction=define
useithreads=undef, usemultiplicity=undef
useperlio=define, d_sfio=undef, uselargefiles=define, usesocks=undef
use64bitint=define, use64bitall=define, uselongdouble=undef
usemymalloc=n, bincompat5005=undef
Compiler:
cc='cc', ccflags ='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -I/opt/local/include',
optimize='-O3',
cppflags='-fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -I/opt/local/include -fno-common -DPERL_DARWIN -fno-strict-aliasing -pipe -fstack-protector -I/usr/local/include -I/opt/local/include'
ccversion='', gccversion='4.2.1 Compatible Apple Clang 4.0 ((tags/Apple/clang-421.0.57))', gccosandvers=''
intsize=4, longsize=8, ptrsize=8, doublesize=8, byteorder=12345678
d_longlong=define, longlongsize=8, d_longdbl=define, longdblsize=16
ivtype='long', ivsize=8, nvtype='double', nvsize=8, Off_t='off_t', lseeksize=8
alignbytes=8, prototype=define
Linker and Libraries:
ld='env MACOSX_DEPLOYMENT_TARGET=10.3 cc', ldflags =' -fstack-protector -L/usr/local/lib -L/opt/local/lib'
libpth=/usr/local/lib /opt/local/lib /usr/lib
libs=-lgdbm -ldbm -ldl -lm -lutil -lc
perllibs=-ldl -lm -lutil -lc
libc=, so=dylib, useshrplib=false, libperl=libperl.a
gnulibc_version=''
Dynamic Linking:
dlsrc=dl_dlopen.xs, dlext=bundle, d_dlsymun=undef, ccdlflags=' '
cccdlflags=' ', lddlflags=' -bundle -undefined dynamic_lookup -L/usr/local/lib -L/opt/local/lib -fstack-protector'
Locally applied patches:
---
@INC for perl 5.19.1:
lib
/Users/rjbs/.perlbrew/libs/19.0@std/lib/perl5/darwin-2level
/Users/rjbs/.perlbrew/libs/19.0@std/lib/perl5
/usr/local/lib/perl5/site_perl/5.19.1/darwin-2level
/usr/local/lib/perl5/site_perl/5.19.1
/usr/local/lib/perl5/5.19.1/darwin-2level
/usr/local/lib/perl5/5.19.1
.
---
Environment for perl 5.19.1:
DYLD_LIBRARY_PATH (unset)
HOME=/Users/rjbs
LANG=en_US.UTF-8
LANGUAGE (unset)
LD_LIBRARY_PATH (unset)
LOGDIR (unset)
PATH=/Users/rjbs/.perlbrew/libs/19.0@std/bin:/Users/rjbs/perl5/perlbrew/bin:/Users/rjbs/perl5/perlbrew/perls/19.0/bin:/Users/rjbs/bin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/opt/X11/bin:/Users/rjbs/code/hla
PERL5LIB=/Users/rjbs/.perlbrew/libs/19.0@std/lib/perl5
PERLBREW_BASHRC_VERSION=0.63
PERLBREW_HOME=/Users/rjbs/.perlbrew
PERLBREW_LIB=std
PERLBREW_MANPATH=/Users/rjbs/.perlbrew/libs/19.0@std/man:/Users/rjbs/perl5/perlbrew/perls/19.0/man
PERLBREW_PATH=/Users/rjbs/.perlbrew/libs/19.0@std/bin:/Users/rjbs/perl5/perlbrew/bin:/Users/rjbs/perl5/perlbrew/perls/19.0/bin
PERLBREW_PERL=19.0
PERLBREW_ROOT=/Users/rjbs/perl5/perlbrew
PERLBREW_VERSION=0.63
PERLDOC=-n/opt/local/bin/groff
PERL_AUTOINSTALL=--skipdeps
PERL_BADLANG (unset)
PERL_LOCAL_LIB_ROOT=/Users/rjbs/.perlbrew/libs/19.0@std
PERL_MAILERS=sendmail:/Users/rjbs/bin/sendmail
PERL_MB_OPT=--install_base /Users/rjbs/.perlbrew/libs/19.0@std
PERL_MM_OPT=INSTALL_BASE=/Users/rjbs/.perlbrew/libs/19.0@std
SHELL=/opt/local/bin/zsh
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