Add excimer profiler support

[andrei-stsiapanau]

Add the excimer profiler support please. It used by Sentry to create request profiles for futher analysis and may be verify helpful.

[henderkes]

Static compilation works, shared extension segfaults on all compilers.

[henderkes]

(gdb) run
Starting program: /home/m/static-php-cli/buildroot/bin/php -n -d extension_dir=/home/m/static-php-cli/buildroot/modules -d extension=excimer --ri excimer
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib64/libthread_db.so.1".

Program received signal SIGSEGV, Segmentation fault.
0x00007ffff7251ca9 in zend_register_ini_entries_ex (ini_entry=0x7ffff77ed120 <ini_entries>, module_number=9, module_type=1) at /home/m/static-php-cli/source/php-src/Zend/zend_ini.c:219
219             if (directives != EG(ini_directives)) {
(gdb) bt full
#0  0x00007ffff7251ca9 in zend_register_ini_entries_ex (ini_entry=0x7ffff77ed120 <ini_entries>, module_number=9, module_type=1) at /home/m/static-php-cli/source/php-src/Zend/zend_ini.c:219
        p = 0x1
        default_value = 0x9f55e11600000004
        directives = 0x0
#1  0x00007ffff6e085e8 in zm_startup_excimer (type=1, module_number=9) at /home/m/static-php-cli/source/php-src/ext/excimer/excimer.c:498
        ce = {type = 0 '\000', name = 0x0, {parent = 0x0, parent_name = 0x0}, refcount = 0, ce_flags = 0, default_properties_count = 0, default_static_members_count = 0, default_properties_table = 0x0, default_static_members_table = 0x0, 
          static_members_table__ptr = 0x0, function_table = {gc = {refcount = 0, u = {type_info = 0}}, u = {v = {flags = 0 '\000', _unused = 0 '\000', nIteratorsCount = 0 '\000', _unused2 = 0 '\000'}, flags = 0}, nTableMask = 0, {arHash = 0x0, 
              arData = 0x0, arPacked = 0x0}, nNumUsed = 0, nNumOfElements = 0, nTableSize = 0, nInternalPointer = 0, nNextFreeElement = 0, pDestructor = 0x0}, properties_info = {gc = {refcount = 0, u = {type_info = 0}}, u = {v = {
                flags = 0 '\000', _unused = 0 '\000', nIteratorsCount = 0 '\000', _unused2 = 0 '\000'}, flags = 0}, nTableMask = 0, {arHash = 0x0, arData = 0x0, arPacked = 0x0}, nNumUsed = 0, nNumOfElements = 0, nTableSize = 0, 
            nInternalPointer = 0, nNextFreeElement = 0, pDestructor = 0x0}, constants_table = {gc = {refcount = 0, u = {type_info = 0}}, u = {v = {flags = 0 '\000', _unused = 0 '\000', nIteratorsCount = 0 '\000', _unused2 = 0 '\000'}, 
              flags = 0}, nTableMask = 0, {arHash = 0x0, arData = 0x0, arPacked = 0x0}, nNumUsed = 0, nNumOfElements = 0, nTableSize = 0, nInternalPointer = 0, nNextFreeElement = 0, pDestructor = 0x0}, mutable_data__ptr = 0x0, 
          inheritance_cache = 0x0, properties_info_table = 0x0, constructor = 0x0, destructor = 0x555555ff5680 <std_object_handlers>, clone = 0x0, __get = 0x0, __set = 0x0, __unset = 0x0, __isset = 0x0, __call = 0x0, __callstatic = 0x0, 
          __tostring = 0x0, __debugInfo = 0x0, __serialize = 0x0, __unserialize = 0x0, default_object_handlers = 0x0, iterator_funcs_ptr = 0x0, arrayaccess_funcs_ptr = 0x0, {create_object = 0x0, interface_gets_implemented = 0x0}, 
          get_iterator = 0x0, get_static_method = 0x0, serialize = 0x555555f7ef20 <class_MultipleIterator_methods>, unserialize = 0x0, num_interfaces = 2460292608, num_traits = 2673205526, num_hooked_props = 8, 
          num_hooked_prop_variance_checks = 0, {interfaces = 0x0, interface_names = 0x0}, trait_names = 0x7ffff7ffd000 <_rtld_local>, trait_aliases = 0x555555f639b8, trait_precedences = 0x7fffffffc170, 
          attributes = 0x55555578099c <zm_startup_spl_observer+520>, enum_backing_type = 4154490880, backed_enum_table = 0x100000008, doc_comment = 0x7fffffffc190, info = {user = {filename = 0x55555573f16e <zm_startup_spl+151>, 
              line_start = 4154490880, line_end = 32767}, internal = {builtin_functions = 0x55555573f16e <zm_startup_spl+151>, module = 0x7ffff7a08000}}}
--Type <RET> for more, q to quit, c to continue without paging--
#2  0x0000555555a47019 in zend_startup_module_ex (module=0x7ffff787e6e0 <excimer_module_entry>) at /home/m/static-php-cli/source/php-src/Zend/zend_API.c:2446
        name_len = 4
        lcname = 0x7ffff7a08000
#3  0x0000555555a47092 in zend_startup_module_zval (zv=0x555556026240) at /home/m/static-php-cli/source/php-src/Zend/zend_API.c:2461
        module = 0x7ffff787e6e0 <excimer_module_entry>
#4  0x0000555555c61b00 in zend_hash_apply (ht=0x55555600e3c0 <module_registry>, apply_func=0x555555a4706f <zend_startup_module_zval>) at /home/m/static-php-cli/source/php-src/Zend/zend_hash.c:2092
        p = 0x555556026240
        idx = 9
        result = 0
#5  0x0000555555a47834 in zend_startup_modules () at /home/m/static-php-cli/source/php-src/Zend/zend_API.c:2584
No locals.
#6  0x0000555555930ef1 in php_module_startup (sf=0x555555ff9d80 <cli_sapi_module>, additional_module=0x0) at /home/m/static-php-cli/source/php-src/main/main.c:2290
        zuf = {error_function = 0x55555592e06e <php_error_cb>, printf_function = 0x55555592cc57 <php_printf>, write_function = 0x5555559355a4 <php_output_write>, fopen_function = 0x55555592f463 <php_fopen_wrapper_for_zend>, 
          message_handler = 0x55555592f7c5 <php_message_handler_for_zend>, get_configuration_directive = 0x55555592f6eb <php_get_configuration_directive_for_zend>, ticks_function = 0x55555593e73c <php_run_ticks>, 
          on_timeout = 0x55555592fbb0 <php_on_timeout>, stream_open_function = 0x55555592f544 <php_stream_open_for_zend>, printf_to_smart_string_function = 0x555555952c32 <php_printf_to_smart_string>, 
          printf_to_smart_str_function = 0x555555952c62 <php_printf_to_smart_str>, getenv_function = 0x55555594c742 <sapi_getenv>, resolve_path_function = 0x55555592f6a6 <php_resolve_path_for_zend>, 
          random_bytes_function = 0x5555556e54df <php_random_bytes_ex>, random_bytes_insecure_function = 0x5555556f3433 <php_random_bytes_insecure_for_zend>}
--Type <RET> for more, q to quit, c to continue without paging--
        zuv = {html_errors = true}
        retval = SUCCESS
        module_number = 0
        module = 0x555556012cd0
#7  0x0000555555d3e3ba in php_cli_startup (sapi_module=0x555555ff9d80 <cli_sapi_module>) at /home/m/static-php-cli/source/php-src/sapi/cli/php_cli.c:397
No locals.
#8  0x0000555555d40dbe in main (argc=8, argv=0x555556013df0) at /home/m/static-php-cli/source/php-src/sapi/cli/php_cli.c:1277
        c = -1
        exit_status = 0
        module_started = 0
        sapi_started = 1
        php_optarg = 0x555556013f60 "excimer"
        php_optind = 8
        use_extended_info = 0
        ini_path_override = 0x0
        ini_builder = {value = 0x5555560174f0 "html_errors=0\nregister_argc_argv=1\nimplicit_flush=1\noutput_buffering=0\nmax_execution_time=0\nmax_input_time=-1\nextension_dir=\"/home/m/static-php-cli/buildroot/modules\"\nextension=excimer\n", 
          length = 185}
--Type <RET> for more, q to quit, c to continue without paging--
        ini_ignore = 1
        sapi_module = 0x555555ff9d80 <cli_sapi_module>
(gdb) info locals
p = 0x1
default_value = 0x9f55e11600000004
directives = 0x0
(gdb) frame 0
#0  0x00007ffff7251ca9 in zend_register_ini_entries_ex (ini_entry=0x7ffff77ed120 <ini_entries>, module_number=9, module_type=1) at /home/m/static-php-cli/source/php-src/Zend/zend_ini.c:219
219             if (directives != EG(ini_directives)) {
(gdb) info args
ini_entry = 0x7ffff77ed120 <ini_entries>
module_number = 9
module_type = 1
(gdb) list
214              * This solves two problems: one is that ini entries for dl()'d
215              * extensions will now work, and the second is that updating the
216              * global hash here from dl() is not mutex protected and can
217              * lead to death.
218              */
219             if (directives != EG(ini_directives)) {
220                     directives = EG(ini_directives);
221             } else {
222                     ZEND_ASSERT(module_type == MODULE_PERSISTENT);
223             }