pcre, pcre2 jit libraries hang calling functions, resulting in segmentation faults

[essandess (Steve Smith)]

The pcre, pcre2 jit libraries hang when called in some situations, causing segmentation faults.

This is observed when they are used as dependencies for ​https://github.com/rspamd/rspamd.

Here's a core dump trace using pcre: ​https://github.com/rspamd/rspamd/issues/2884#issuecomment-489235483

The offending routines in this example are: sljit_free_code and _pcre_jit_compile.

See this PR for a Portfile example of the rspamd port that forces the use of the native /usr/lib/libpcre.dylib library (compiled without jit) to avoid this issue: ​https://github.com/macports/macports-ports/commit/3778fcef647b9d3cfa19f40fd4d59aa97ae1f25a

In the current rspamd build that uses native pcre, it reports in its logs:

2019-05-04 05:03:59 #69648(main) rspamd_regexp_library_init: pcre is compiled without JIT support, so many optimizations are impossible

Getting working jit in pcre and pcre2 would be great to have.

[essandess (Steve Smith)]

In 00cf8a72e451a59e5d71433c06f5a734f64422a8/macports-ports (master):

rspamd: Fixed build for macOS and improved Portfile

• Build fixes segmentaton fault and -DCMAKE_OSX_ARCHITECTURES issues
• Add port:libstemmer and port:libunwind dependencies
• Organize dependencies in the correct sections
• ​https://github.com/rspamd/rspamd/issues/2884
• ​https://github.com/rspamd/rspamd/issues/2883
• 857c47b3beba97eb7e9934c5bff6e8982bf44307/macports-ports
• #58437

[essandess (Steve Smith)]

In 3c71ad86d24354406a813ce34afeaf9d5c2f86e3/macports-ports (master):

rspamd: Add hyperscan regex processing

• Add hyperscan regex processing to the rspamd build
• ​https://github.com/macports/macports-ports/pull/4260
• Best regex option, also addresses current issues with ort:pcre, port:pcre2

see: #58437