pcre2: add run_tests.sh

[AdamKorcz]

Adds run_tests.sh to the pcre2 project.

The PR changes the max match limit. Otherwise the tests fail.

run_tests.sh is used as part of Chronos with cached builds: https://github.com/google/oss-fuzz/tree/master/infra/experimental/chronos#check-tests

infra/experimental/chronos/check_tests.sh pcre2 c

...
PASS: pcre2posix_test                                                        
PASS: pcre2_jit_test                                                                                                                                       
PASS: RunTest                                                                
PASS: RunGrepTest                                                            
============================================================================ 
Testsuite summary for PCRE2 10.46-DEV                                        
============================================================================ 
# TOTAL: 4                                                                                                                                                 
# PASS:  4                                                                                                                                                 
# SKIP:  0                                                                   
# XFAIL: 0                                                                   
# FAIL:  0                                                                                                                                                 
# XPASS: 0                                                                   
# ERROR: 0                                                                   
============================================================================
make[3]: Leaving directory '/src/pcre2'                                                                                                                    
make[2]: Leaving directory '/src/pcre2'                                      
make[1]: Leaving directory '/src/pcre2'

[AdamKorcz]

@addisoncrump @PhilipHazel do you see any reason that increasing the match limit depth will have a negative impact on the fuzzers?

[PhilipHazel]

I suspect it will increase the number of timeouts. Note: I am no longer working on PCRE2. Regards, Philip

…

On Tue, 15 Jul 2025 at 20:57, AdamKorcz ***@***.***> wrote: *AdamKorcz* left a comment (google/oss-fuzz#13636) <#13636 (comment)> @addisoncrump <https://github.com/addisoncrump> @PhilipHazel <https://github.com/PhilipHazel> do you see any reason that increasing the match limit depth will have a negative impact on the fuzzers? — Reply to this email directly, view it on GitHub <#13636 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/AG4QUAGSVYHKJXAK7JNF6XD3IVMJRAVCNFSM6AAAAACBS4MZ7CVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMZTANZVGMYTQMJXGU> . You are receiving this because you were mentioned.Message ID: ***@***.***>

[DavidKorczynski]

LGTM. The change to --with-match-limit is to enable the tests to pass, which is needed for Chronos. If the consequences is an unreasonable number of timeouts or similar in the harness then we'll have to address in follow ups.

[addisoncrump]

Bit late to the party, but yes, the match limit was reduced to reduce the number of timeouts.