[Bug 1285097] [NEW] PCRE JIT doesn't work on trusty

[Brane F. Gračnar]

Public bug reported:

Hello!

I'm trying to utilize PCRE JIT on latest ubuntu trusty. Haproxy and
nginx compile fine with PCRE JIT support, however JIT support doesn't
work.

Haproxy 1.5-dev22:
--- snip ---
HA-Proxy version 1.5-dev22-snapshot-20140225 2014/02/03
Copyright 2000-2014 Willy Tarreau <w at 1wt.eu>

Build options :
  TARGET  = linux2628
  CPU     = generic
  CC      = gcc
  CFLAGS  = -O3 -pipe -fomit-frame-pointer -funroll-loops -g
  OPTIONS = USE_LINUX_SPLICE=1 USE_CTTPROXY=1 USE_LINUX_TPROXY=1 USE_LIBCRYPT=1 USE_GETADDRINFO=1 USE_ZLIB=1 USE_CPU_AFFINITY=1 USE_REGPARM=1 USE_OPENSSL=1 USE_STATIC_PCRE=1 USE_PCRE_JIT=1 USE_TFO=1

Default settings :
  maxconn = 2000, bufsize = 16384, maxrewrite = 8192, maxpollevents = 200

Encrypted password support via crypt(3): yes
Built with zlib version : 1.2.8
Compression algorithms supported : identity, deflate, gzip
Built with OpenSSL version : OpenSSL 1.0.1f 6 Jan 2014
Running on OpenSSL version : OpenSSL 1.0.1f 6 Jan 2014
OpenSSL library supports TLS extensions : yes
OpenSSL library supports SNI : yes
OpenSSL library supports prefer-server-ciphers : yes
Built with PCRE version : 8.31 2012-07-06
PCRE library supports JIT : no (libpcre build without JIT?)
Built with transparent proxy support using: CTTPROXY IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
--- snip ---

Nginx 1.5.10:
--- snip ---
nginx: [warn] PCRE library does not support JIT in /etc/nginx/extra/nginx-main.conf:23
nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
nginx: configuration file /etc/nginx/nginx.conf test is successful
--- snip ---

I think that PCRE jit can have serious performance advantage with
software that can utilize it (heavy loaded nginx/haproxy instances with
lots of pcre rules).

For performance comparisions see:
http://sljit.sourceforge.net/regex_perf.html

** Affects: pcre3 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1285097

Title:
  PCRE JIT doesn't work on trusty

Status in “pcre3” package in Ubuntu:
  New

Bug description:
  Hello!

  I'm trying to utilize PCRE JIT on latest ubuntu trusty. Haproxy and
  nginx compile fine with PCRE JIT support, however JIT support doesn't
  work.

  Haproxy 1.5-dev22:
  --- snip ---
  HA-Proxy version 1.5-dev22-snapshot-20140225 2014/02/03
  Copyright 2000-2014 Willy Tarreau <w at 1wt.eu>

  Build options :
    TARGET  = linux2628
    CPU     = generic
    CC      = gcc
    CFLAGS  = -O3 -pipe -fomit-frame-pointer -funroll-loops -g
    OPTIONS = USE_LINUX_SPLICE=1 USE_CTTPROXY=1 USE_LINUX_TPROXY=1 USE_LIBCRYPT=1 USE_GETADDRINFO=1 USE_ZLIB=1 USE_CPU_AFFINITY=1 USE_REGPARM=1 USE_OPENSSL=1 USE_STATIC_PCRE=1 USE_PCRE_JIT=1 USE_TFO=1

  Default settings :
    maxconn = 2000, bufsize = 16384, maxrewrite = 8192, maxpollevents = 200

  Encrypted password support via crypt(3): yes
  Built with zlib version : 1.2.8
  Compression algorithms supported : identity, deflate, gzip
  Built with OpenSSL version : OpenSSL 1.0.1f 6 Jan 2014
  Running on OpenSSL version : OpenSSL 1.0.1f 6 Jan 2014
  OpenSSL library supports TLS extensions : yes
  OpenSSL library supports SNI : yes
  OpenSSL library supports prefer-server-ciphers : yes
  Built with PCRE version : 8.31 2012-07-06
  PCRE library supports JIT : no (libpcre build without JIT?)
  Built with transparent proxy support using: CTTPROXY IP_TRANSPARENT IPV6_TRANSPARENT IP_FREEBIND
  --- snip ---

  Nginx 1.5.10:
  --- snip ---
  nginx: [warn] PCRE library does not support JIT in /etc/nginx/extra/nginx-main.conf:23
  nginx: the configuration file /etc/nginx/nginx.conf syntax is ok
  nginx: configuration file /etc/nginx/nginx.conf test is successful
  --- snip ---

  I think that PCRE jit can have serious performance advantage with
  software that can utilize it (heavy loaded nginx/haproxy instances
  with lots of pcre rules).

  For performance comparisions see:
  http://sljit.sourceforge.net/regex_perf.html

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