From 4f37764ece84a705710ba9039a3db9a4710ce86a Mon Sep 17 00:00:00 2001 From: "Philip.Hazel" Date: Sat, 17 Jun 2017 15:36:22 +0000 Subject: [PATCH] Document configuration for SELinux execmem allocator and fix CMake usage. --- CMakeLists.txt | 1 + ChangeLog | 3 +++ README | 7 +++++-- config-cmake.h.in | 1 + doc/pcre2build.3 | 23 ++++++++++++++--------- 5 files changed, 24 insertions(+), 11 deletions(-) diff --git a/CMakeLists.txt b/CMakeLists.txt index 956aa18..5ebe695 100644 --- a/CMakeLists.txt +++ b/CMakeLists.txt @@ -79,6 +79,7 @@ # 2016-10-07 PH added PCREGREP_MAX_BUFSIZE # 2017-03-11 PH turned HEAP_MATCH_RECURSE into a NO-OP for 10.30 # 2017-04-08 PH added HEAP_LIMIT +# 2017-06-15 ZH added SUPPORT_JIT_SEALLOC support PROJECT(PCRE2 C) diff --git a/ChangeLog b/ChangeLog index 67f393c..2bb4e08 100644 --- a/ChangeLog +++ b/ChangeLog @@ -197,6 +197,9 @@ PCRE2_EXTRA_MATCH_WORD, and PCRE2_EXTRA_MATCH_LINE. This fixes two bugs: (a) The -F option did not work for fixed strings containing \E. (b) The -w option did not work for patterns with multiple branches. + +44. Added configuration options for the SELinux compatible execmem allocator in +JIT. Version 10.23 14-February-2017 diff --git a/README b/README index 336f5d9..6bf5b46 100644 --- a/README +++ b/README @@ -171,7 +171,10 @@ library. They are also documented in the pcre2build man page. give large performance improvements on certain platforms, add --enable-jit to the "configure" command. This support is available only for certain hardware architectures. If you try to enable it on an unsupported architecture, there - will be a compile time error. + will be a compile time error. If you are running under SELinux you may also + want to add --enable-jit-sealloc, which enables the use of an execmem + allocator in JIT that is compatible with SELinux. This has no effect if JIT + is not enabled. . If you do not want to make use of the default support for UTF-8 Unicode character strings in the 8-bit library, UTF-16 Unicode character strings in @@ -874,4 +877,4 @@ The distribution should contain the files listed below. Philip Hazel Email local part: ph10 Email domain: cam.ac.uk -Last updated: 11 April 2017 +Last updated: 17 June 2017 diff --git a/config-cmake.h.in b/config-cmake.h.in index d34cc33..9b4f15d 100644 --- a/config-cmake.h.in +++ b/config-cmake.h.in @@ -25,6 +25,7 @@ #cmakedefine SUPPORT_LIBZ 1 #cmakedefine SUPPORT_JIT 1 +#cmakedefine SLJIT_PROT_EXECUTABLE_ALLOCATOR 1 #cmakedefine SUPPORT_PCRE2GREP_JIT 1 #cmakedefine SUPPORT_UNICODE 1 #cmakedefine SUPPORT_VALGRIND 1 diff --git a/doc/pcre2build.3 b/doc/pcre2build.3 index bbf5466..8b081d9 100644 --- a/doc/pcre2build.3 +++ b/doc/pcre2build.3 @@ -1,4 +1,4 @@ -.TH PCRE2BUILD 3 "30 May 2017" "PCRE2 10.30" +.TH PCRE2BUILD 3 "17 June 2017" "PCRE2 10.30" .SH NAME PCRE2 - Perl-compatible regular expressions (revised API) . @@ -156,8 +156,13 @@ Just-in-time (JIT) compiler support is included in the build by specifying --enable-jit .sp This support is available only for certain hardware architectures. If this -option is set for an unsupported architecture, a building error occurs. -See the +option is set for an unsupported architecture, a building error occurs. If you +are running under SELinux you may also want to add +.sp + --enable-jit-sealloc +.sp +which enables the use of an execmem allocator in JIT that is compatible with +SELinux. This has no effect if JIT is not enabled. See the .\" HREF \fBpcre2jit\fP .\" @@ -273,7 +278,7 @@ documentation. The default limit (in effect unlimited) is 20 million. You can change this by a setting such as .sp --with-heap-limit=500 -.sp +.sp which limits the amount of heap to 500 kilobytes. This limit applies only to interpretive matching in pcre2_match(). It does not apply when JIT (which has its own memory arrangements) is used, nor does it apply to @@ -528,7 +533,7 @@ contains a single function called LLVMFuzzerTestOneInput() whose arguments are a pointer to a string and the length of the string. When called, this function tries to compile the string as a pattern, and if that succeeds, to match it. This is done both with no options and with some random options bits that are -generated from the string. +generated from the string. .P Setting --enable-fuzz-support also causes a binary called \fBpcre2fuzzcheck\fP to be created. This is normally run under valgrind or used when PCRE2 is @@ -542,13 +547,13 @@ file are the test string. .SH "OBSOLETE OPTION" .rs .sp -In versions of PCRE2 prior to 10.30, there were two ways of handling -backtracking in the \fBpcre2_match()\fP function. The default was to use the +In versions of PCRE2 prior to 10.30, there were two ways of handling +backtracking in the \fBpcre2_match()\fP function. The default was to use the system stack, but if .sp --disable-stack-for-recursion .sp -was set, memory on the heap was used. From release 10.30 onwards this has +was set, memory on the heap was used. From release 10.30 onwards this has changed (the stack is no longer used) and this option now does nothing except give a warning. . @@ -572,6 +577,6 @@ Cambridge, England. .rs .sp .nf -Last updated: 30 May 2017 +Last updated: 17 June 2017 Copyright (c) 1997-2017 University of Cambridge. .fi