Edit report at https://bugs.php.net/bug.php?id=66499&edit=1
ID: 66499
Updated by: rasmus@php.net
Reported by: spam2 at rhsoft dot net
Summary: strace segfault with opcache > php 5.5.7
Status: Analyzed
Type: Bug
Package: opcache
Operating System: Linux
PHP Version: 5.5.8
Block user comment: N
Private report: N
New Comment:
Nope, we are only interested in the symbols from opcache and possibly php, so it is sufficient to
not strip opcache.so and get us the gdb backtrace from that to start with.
As for one-commit per tarball. Who does that? That's what git bisect is for.
Previous Comments:
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[2014-01-17 09:31:45] spam2 at rhsoft dot net
if you *really* would be interested in solve that problem someone would provide tarballs of
opcache-source from 5.5.6 to 5.5.7 containing only one commit or simply would review the code
changes as otehr upstream projects do
> An strace is not useful
why is it for other upstream projects and not for PHP?
> We need a reproducing code snippet
there is no "code snippet", there are whole applications
there is a 3000 LOC large library and there is a script using it, MySQL and a Asterisk phonebox via
passthru() and the other application are 250000 LOC
> or a gdb backtrace
you are aware that this means compile apache, apache-modules, php-core again without strip debug
symbols and install hundrets of megabytes debug-packages and that we are talking about a production
machine?
you could provide opcache-tarballs from 5.5.6 to 5.5.7 each containing only one change - the
extension-build takes a few seconds and it should be easy that way to identify
by knowing now it is the optimizer someone could also review the changes from 5.5.6 to 5.5.7
critical or even try to solve the intention of the changes in a different way - sadly there are too
few upstream-developers like dbmail where you find a problem and most of the time need not more to
say then between which commits in case of only a few change lines of code
------------------------------------------------------------------------
[2014-01-17 00:30:00] rasmus@php.net
An strace is not useful. We need a reproducing code snippet or a gdb backtrace.
------------------------------------------------------------------------
[2014-01-16 19:10:36] spam2 at rhsoft dot net
Description:
------------
strace below, for more informations:
https://bugs.php.net/bug.php?id=66460
and yes this is opcache-head and not 5.5.8 source
thank you for closing the bugreport as first action after some
days because *others* reported all is fine... what about wait
after the reporter confirms this and what about consider that
any opcache commit after 55.6 has it's own bugs?
[root@asterisk:~]$ strace -vf -p 17235
Process 17235 attached
accept4(3, {sa_family=AF_INET, sin_port=htons(38214), sin_addr=inet_addr("91.118.73.6")},
[16], SOCK_CLOEXEC) = 8
getsockname(8, {sa_family=AF_INET, sin_port=htons(80),
sin_addr=inet_addr("85.124.176.242")}, [16]) = 0
fcntl(8, F_GETFL) = 0x2 (flags O_RDWR)
fcntl(8, F_SETFL, O_RDWR|O_NONBLOCK) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f095dcbe000
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f095dcbc000
read(8, "GET /channels.php?html=1 HTTP/1."..., 8000) = 35
read(8, 0x7f095dcbc048, 8000) = -1 EAGAIN (Resource temporarily unavailable)
poll([{fd=8, events=POLLIN}], 1, 5069) = 1 ([{fd=8, revents=POLLIN}])
read(8, "Host: voip.thelounge.net\r\nUser-A"..., 8000) = 110
stat("/var/www/htdocs/channels.php", {st_dev=makedev(8, 17), st_ino=147731,
st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4065,
st_atime=2011/12/14-16:41:25, st_mtime=2012/11/27-16:39:26, st_ctime=2012/11/27-16:39:26}) = 0
lstat("/var/www/htdocs/channels.php", {st_dev=makedev(8, 17), st_ino=147731,
st_mode=S_IFREG|0644, st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4065,
st_atime=2011/12/14-16:41:25, st_mtime=2012/11/27-16:39:26, st_ctime=2012/11/27-16:39:26}) = 0
mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f095dcba000
setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={60, 0}}, NULL) = 0
rt_sigaction(SIGPROF, {0x7f095b8d6810, [PROF], SA_RESTORER|SA_RESTART, 0x7f095c1c4a60}, {SIG_DFL,
[], 0}, 8) = 0
rt_sigprocmask(SIG_UNBLOCK, [PROF], NULL, 8) = 0
getcwd("/", 4095) = 2
chdir("/var/www/htdocs") = 0
setitimer(ITIMER_PROF, {it_interval={0, 0}, it_value={120, 0}}, NULL) = 0
fcntl(6, F_SETLK, {type=F_RDLCK, whence=SEEK_SET, start=1, len=1}) = 0
getcwd("/var/www/htdocs", 4096) = 16
lstat("/var/www/htdocs", {st_dev=makedev(8, 17), st_ino=147474, st_mode=S_IFDIR|0755,
st_nlink=2, st_uid=0, st_gid=48, st_blksize=4096, st_blocks=8, st_size=4096,
st_atime=2011/12/14-16:41:25, st_mtime=2011/01/25-13:52:36, st_ctime=2011/12/14-16:41:25}) = 0
lstat("/var/www", {st_dev=makedev(8, 17), st_ino=148415, st_mode=S_IFDIR|0755, st_nlink=7,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/03/02-12:12:17,
st_mtime=2013/05/08-17:01:15, st_ctime=2013/05/08-17:01:15}) = 0
lstat("/var", {st_dev=makedev(8, 17), st_ino=24577, st_mode=S_IFDIR|0755, st_nlink=20,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/07/08-10:56:45,
st_mtime=2014/01/07-13:16:15, st_ctime=2014/01/07-13:16:15}) = 0
lstat("/var/www/htdocs", {st_dev=makedev(8, 17), st_ino=147474, st_mode=S_IFDIR|0755,
st_nlink=2, st_uid=0, st_gid=48, st_blksize=4096, st_blocks=8, st_size=4096,
st_atime=2011/12/14-16:41:25, st_mtime=2011/01/25-13:52:36, st_ctime=2011/12/14-16:41:25}) = 0
lstat("/var/www", {st_dev=makedev(8, 17), st_ino=148415, st_mode=S_IFDIR|0755, st_nlink=7,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/03/02-12:12:17,
st_mtime=2013/05/08-17:01:15, st_ctime=2013/05/08-17:01:15}) = 0
lstat("/var", {st_dev=makedev(8, 17), st_ino=24577, st_mode=S_IFDIR|0755, st_nlink=20,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/07/08-10:56:45,
st_mtime=2014/01/07-13:16:15, st_ctime=2014/01/07-13:16:15}) = 0
lstat("/var/www/htdocs", {st_dev=makedev(8, 17), st_ino=147474, st_mode=S_IFDIR|0755,
st_nlink=2, st_uid=0, st_gid=48, st_blksize=4096, st_blocks=8, st_size=4096,
st_atime=2011/12/14-16:41:25, st_mtime=2011/01/25-13:52:36, st_ctime=2011/12/14-16:41:25}) = 0
lstat("/var/www", {st_dev=makedev(8, 17), st_ino=148415, st_mode=S_IFDIR|0755, st_nlink=7,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/03/02-12:12:17,
st_mtime=2013/05/08-17:01:15, st_ctime=2013/05/08-17:01:15}) = 0
lstat("/var", {st_dev=makedev(8, 17), st_ino=24577, st_mode=S_IFDIR|0755, st_nlink=20,
st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, st_size=4096, st_atime=2013/07/08-10:56:45,
st_mtime=2014/01/07-13:16:15, st_ctime=2014/01/07-13:16:15}) = 0
chdir("/var/www/htdocs") = 0
getcwd("/var/www/htdocs", 4096) = 16
--- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0x41} ---
chdir("/etc/httpd") = 0
rt_sigaction(SIGSEGV, {SIG_DFL, [], SA_RESTORER|SA_INTERRUPT, 0x7f095c971f90}, {SIG_DFL, [],
SA_RESTORER|SA_RESETHAND, 0x7f095c971f90}, 8) = 0
kill(17235, SIGSEGV) = 0
rt_sigreturn() = 139678171845640
--- SIGSEGV {si_signo=SIGSEGV, si_code=SI_USER, si_pid=17235, si_uid=490} ---
+++ killed by SIGSEGV +++
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--
Edit this bug report at https://bugs.php.net/bug.php?id=66499&edit=1