disable Appsec when FrankenPHP SAPI is detected

[realFlowControl]

Description

When installing via php datadog-setup.php appsec will also be installed but crash FrankenPHP after few HTTP requests with the following stack trace:

Thread 21 "thpool-7" received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xffff68f9f020 (LWP 835)]
dd_entity_body_rinit () at /home/circleci/datadog/appsec/src/extension/entity_body.c:112
112	/home/circleci/datadog/appsec/src/extension/entity_body.c: No such file or directory.
(gdb) bt
#0  dd_entity_body_rinit () at /home/circleci/datadog/appsec/src/extension/entity_body.c:112
#1  0x0000ffff80ccbf68 in zm_activate_ddappsec (type=<optimized out>, module_number=<optimized out>) at /home/circleci/datadog/appsec/src/extension/ddappsec.c:266
#2  0x0000fffff72130e4 in zend_activate_modules () at /usr/local/src/php/Zend/zend_API.c:3218
#3  0x0000fffff70ef4dc in php_request_startup () at /usr/local/src/php/main/main.c:1811
#4  0x000000000169058c in frankenphp_request_startup () at frankenphp.c:818
#5  0x000000000169060c in frankenphp_execute_script (file_name=0xffff40078b20 "/go/src/app/testdata/session.php") at frankenphp.c:833
#6  0x000000000168dce4 in _cgo_b7d6fd74a0c8_Cfunc_frankenphp_execute_script (v=0x4000718da8) at /tmp/go-build/cgo-gcc-prolog:55
#7  0x000000000047e66c in runtime.asmcgocall () at /usr/local/go/src/runtime/asm_arm64.s:999
#8  0x00000040007308c0 in ?? ()
#9  0x0000ffff68f9e5a0 in ?? ()
#10 0xf94013f54b0003e0 in ?? ()

This PR will deactivate appsec when it detects the FrankenPHP SAPI.

Reviewer checklist

• Test coverage seems ok.
• Appropriate labels assigned.

[codecov-commenter]

Codecov Report

Merging #2617 (f4c4c82) into master (c067f72) will decrease coverage by 1.11%.
The diff coverage is 0.00%.

Additional details and impacted files

@@             Coverage Diff              @@
##             master    #2617      +/-   ##
============================================
- Coverage     76.53%   75.43%   -1.11%     
  Complexity     2609     2609              
============================================
  Files           217      243      +26     
  Lines         23319    27319    +4000     
  Branches          0      986     +986     
============================================
+ Hits          17847    20607    +2760     
- Misses         5472     6186     +714     
- Partials          0      526     +526     

Flag	Coverage Δ
appsec-extension	69.00% <0.00%> (?)
tracer-extension	78.70% <ø> (ø)
tracer-php	73.86% <ø> (ø)

Flags with carried forward coverage won't be shown. Click here to find out more.

Files	Coverage Δ
appsec/src/extension/ddappsec.c	76.74% <0.00%> (ø)

... and 25 files with indirect coverage changes

---

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[bwoebi]

Looks good to me, until appsec properly supports it.

[Anilm3]

lgtm, thanks for updating this.

[nklmilojevic]

Thanks for this!