diff --git a/README.md b/README.md
index 00435246..a5ba82b3 100644
--- a/README.md
+++ b/README.md
@@ -48,6 +48,11 @@ sudo php ./php-profiler inspector:trace -p <pid of the target process or thread>
 sudo php ./php-profiler inspector:eg -p <pid of the target process or thread>
 ``` 
 
+## Use daemon mode
+```
+sudo php ./php-profiler inspector:daemon -P <regex to find target processes>
+``` 
+
 ## Use in a docker container and target a process on host
 ```
 docker build -t php-profiler .
@@ -77,4 +82,4 @@ This product includes the Zend Engine, freely available at
 ```
 
 # Credits
-- php-profiler is heavily inspired by [adsr/phpspy](https://github.com/adsr/phpspy).
\ No newline at end of file
+- php-profiler is heavily inspired by [adsr/phpspy](https://github.com/adsr/phpspy).
diff --git a/composer.json b/composer.json
index fc052927..0d06981e 100644
--- a/composer.json
+++ b/composer.json
@@ -20,8 +20,11 @@
     "php": "^7.4",
     "ext-ffi": "*",
     "ext-pcntl": "*",
+    "ext-filter": "*",
     "symfony/console": "^5.0",
-    "php-di/php-di": "^6.1"
+    "php-di/php-di": "^6.1",
+    "amphp/parallel": "^1.4",
+    "amphp/amp": "^2.4"
   },
   "require-dev": {
     "ext-posix": "*",
diff --git a/composer.lock b/composer.lock
index 737a0222..4db5aeea 100644
--- a/composer.lock
+++ b/composer.lock
@@ -4,40 +4,124 @@
         "Read more about it at https://getcomposer.org/doc/01-basic-usage.md#installing-dependencies",
         "This file is @generated automatically"
     ],
-    "content-hash": "ae33faf31d016e2ee04b31555c5573c4",
+    "content-hash": "063825ed6edb78b5dc63a482bf0de643",
     "packages": [
         {
-            "name": "jeremeamia/superclosure",
-            "version": "2.4.0",
+            "name": "amphp/amp",
+            "version": "v2.4.4",
             "source": {
                 "type": "git",
-                "url": "https://github.com/jeremeamia/super_closure.git",
-                "reference": "5707d5821b30b9a07acfb4d76949784aaa0e9ce9"
+                "url": "https://github.com/amphp/amp.git",
+                "reference": "1e58d53e4af390efc7813e36cd215bd82cba4b06"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/jeremeamia/super_closure/zipball/5707d5821b30b9a07acfb4d76949784aaa0e9ce9",
-                "reference": "5707d5821b30b9a07acfb4d76949784aaa0e9ce9",
+                "url": "https://api.github.com/repos/amphp/amp/zipball/1e58d53e4af390efc7813e36cd215bd82cba4b06",
+                "reference": "1e58d53e4af390efc7813e36cd215bd82cba4b06",
                 "shasum": ""
             },
             "require": {
-                "nikic/php-parser": "^1.2|^2.0|^3.0|^4.0",
-                "php": ">=5.4",
-                "symfony/polyfill-php56": "^1.0"
+                "php": ">=7"
             },
             "require-dev": {
-                "phpunit/phpunit": "^4.0|^5.0"
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "ext-json": "*",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^6.0.9 | ^7",
+                "react/promise": "^2",
+                "vimeo/psalm": "^3.11@dev"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "2.4-dev"
+                    "dev-master": "2.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "SuperClosure\\": "src/"
+                    "Amp\\": "lib"
+                },
+                "files": [
+                    "lib/functions.php",
+                    "lib/Internal/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Daniel Lowrey",
+                    "email": "rdlowrey@php.net"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Bob Weinand",
+                    "email": "bobwei9@hotmail.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
                 }
+            ],
+            "description": "A non-blocking concurrency framework for PHP applications.",
+            "homepage": "http://amphp.org/amp",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "awaitable",
+                "concurrency",
+                "event",
+                "event-loop",
+                "future",
+                "non-blocking",
+                "promise"
+            ],
+            "time": "2020-04-30T04:54:50+00:00"
+        },
+        {
+            "name": "amphp/byte-stream",
+            "version": "v1.7.3",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/byte-stream.git",
+                "reference": "b867505edb79dda8f253ca3c3a2bbadae4b16592"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/byte-stream/zipball/b867505edb79dda8f253ca3c3a2bbadae4b16592",
+                "reference": "b867505edb79dda8f253ca3c3a2bbadae4b16592",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "jetbrains/phpstorm-stubs": "^2019.3",
+                "phpunit/phpunit": "^6 || ^7 || ^8",
+                "vimeo/psalm": "^3.9@dev"
+            },
+            "type": "library",
+            "extra": {
+                "branch-alias": {
+                    "dev-master": "1.x-dev"
+                }
+            },
+            "autoload": {
+                "psr-4": {
+                    "Amp\\ByteStream\\": "lib"
+                },
+                "files": [
+                    "lib/functions.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
@@ -45,77 +129,368 @@
             ],
             "authors": [
                 {
-                    "name": "Jeremy Lindblom",
-                    "email": "jeremeamia@gmail.com",
-                    "homepage": "https://github.com/jeremeamia",
-                    "role": "Developer"
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
                 }
             ],
-            "description": "Serialize Closure objects, including their context and binding",
-            "homepage": "https://github.com/jeremeamia/super_closure",
+            "description": "A stream abstraction to make working with non-blocking I/O simple.",
+            "homepage": "http://amphp.org/byte-stream",
             "keywords": [
-                "closure",
-                "function",
-                "lambda",
+                "amp",
+                "amphp",
+                "async",
+                "io",
+                "non-blocking",
+                "stream"
+            ],
+            "time": "2020-04-04T16:56:54+00:00"
+        },
+        {
+            "name": "amphp/parallel",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/parallel.git",
+                "reference": "2c1039bf7ca137eae4d954b14c09a7535d7d4e1c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/parallel/zipball/2c1039bf7ca137eae4d954b14c09a7535d7d4e1c",
+                "reference": "2c1039bf7ca137eae4d954b14c09a7535d7d4e1c",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2",
+                "amphp/byte-stream": "^1.6.1",
+                "amphp/parser": "^1",
+                "amphp/process": "^1",
+                "amphp/serialization": "^1",
+                "amphp/sync": "^1.0.1",
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1.1",
+                "phpunit/phpunit": "^8 || ^7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\Parallel\\": "lib"
+                },
+                "files": [
+                    "lib/Context/functions.php",
+                    "lib/Sync/functions.php",
+                    "lib/Worker/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Stephen Coakley",
+                    "email": "me@stephencoakley.com"
+                }
+            ],
+            "description": "Parallel processing component for Amp.",
+            "homepage": "https://github.com/amphp/parallel",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "concurrent",
+                "multi-processing",
+                "multi-threading"
+            ],
+            "time": "2020-04-27T15:12:37+00:00"
+        },
+        {
+            "name": "amphp/parser",
+            "version": "v1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/parser.git",
+                "reference": "f83e68f03d5b8e8e0365b8792985a7f341c57ae1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/parser/zipball/f83e68f03d5b8e8e0365b8792985a7f341c57ae1",
+                "reference": "f83e68f03d5b8e8e0365b8792985a7f341c57ae1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7"
+            },
+            "require-dev": {
+                "friendsofphp/php-cs-fixer": "^2.3",
+                "phpunit/phpunit": "^6"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\Parser\\": "lib"
+                }
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                }
+            ],
+            "description": "A generator parser to make streaming parsers simple.",
+            "homepage": "https://github.com/amphp/parser",
+            "keywords": [
+                "async",
+                "non-blocking",
                 "parser",
-                "serializable",
-                "serialize",
-                "tokenizer"
+                "stream"
             ],
-            "abandoned": "opis/closure",
-            "time": "2018-03-21T22:21:57+00:00"
+            "time": "2017-06-06T05:29:10+00:00"
         },
         {
-            "name": "nikic/php-parser",
-            "version": "v4.4.0",
+            "name": "amphp/process",
+            "version": "v1.1.0",
             "source": {
                 "type": "git",
-                "url": "https://github.com/nikic/PHP-Parser.git",
-                "reference": "bd43ec7152eaaab3bd8c6d0aa95ceeb1df8ee120"
+                "url": "https://github.com/amphp/process.git",
+                "reference": "355b1e561b01c16ab3d78fada1ad47ccc96df70e"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/nikic/PHP-Parser/zipball/bd43ec7152eaaab3bd8c6d0aa95ceeb1df8ee120",
-                "reference": "bd43ec7152eaaab3bd8c6d0aa95ceeb1df8ee120",
+                "url": "https://api.github.com/repos/amphp/process/zipball/355b1e561b01c16ab3d78fada1ad47ccc96df70e",
+                "reference": "355b1e561b01c16ab3d78fada1ad47ccc96df70e",
                 "shasum": ""
             },
             "require": {
-                "ext-tokenizer": "*",
-                "php": ">=7.0"
+                "amphp/amp": "^2",
+                "amphp/byte-stream": "^1.4",
+                "php": ">=7"
             },
             "require-dev": {
-                "ircmaxell/php-yacc": "0.0.5",
-                "phpunit/phpunit": "^6.5 || ^7.0 || ^8.0"
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1",
+                "phpunit/phpunit": "^6"
             },
-            "bin": [
-                "bin/php-parse"
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\Process\\": "lib"
+                },
+                "files": [
+                    "lib/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
             ],
+            "authors": [
+                {
+                    "name": "Bob Weinand",
+                    "email": "bobwei9@hotmail.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                },
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                }
+            ],
+            "description": "Asynchronous process manager.",
+            "homepage": "https://github.com/amphp/process",
+            "time": "2019-02-26T16:33:03+00:00"
+        },
+        {
+            "name": "amphp/serialization",
+            "version": "v1.0.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/serialization.git",
+                "reference": "693e77b2fb0b266c3c7d622317f881de44ae94a1"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/serialization/zipball/693e77b2fb0b266c3c7d622317f881de44ae94a1",
+                "reference": "693e77b2fb0b266c3c7d622317f881de44ae94a1",
+                "shasum": ""
+            },
+            "require": {
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "phpunit/phpunit": "^9 || ^8 || ^7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\Serialization\\": "src"
+                },
+                "files": [
+                    "src/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Niklas Keller",
+                    "email": "me@kelunik.com"
+                }
+            ],
+            "description": "Serialization tools for IPC and data storage in PHP.",
+            "homepage": "https://github.com/amphp/serialization",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "serialization",
+                "serialize"
+            ],
+            "time": "2020-03-25T21:39:07+00:00"
+        },
+        {
+            "name": "amphp/sync",
+            "version": "v1.4.0",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/amphp/sync.git",
+                "reference": "613047ac54c025aa800a9cde5b05c3add7327ed4"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/amphp/sync/zipball/613047ac54c025aa800a9cde5b05c3add7327ed4",
+                "reference": "613047ac54c025aa800a9cde5b05c3add7327ed4",
+                "shasum": ""
+            },
+            "require": {
+                "amphp/amp": "^2.2",
+                "php": ">=7.1"
+            },
+            "require-dev": {
+                "amphp/php-cs-fixer-config": "dev-master",
+                "amphp/phpunit-util": "^1.1",
+                "phpunit/phpunit": "^9 || ^8 || ^7"
+            },
+            "type": "library",
+            "autoload": {
+                "psr-4": {
+                    "Amp\\Sync\\": "src"
+                },
+                "files": [
+                    "src/functions.php",
+                    "src/ConcurrentIterator/functions.php"
+                ]
+            },
+            "notification-url": "https://packagist.org/downloads/",
+            "license": [
+                "MIT"
+            ],
+            "authors": [
+                {
+                    "name": "Aaron Piotrowski",
+                    "email": "aaron@trowski.com"
+                },
+                {
+                    "name": "Stephen Coakley",
+                    "email": "me@stephencoakley.com"
+                }
+            ],
+            "description": "Mutex, Semaphore, and other synchronization tools for Amp.",
+            "homepage": "https://github.com/amphp/sync",
+            "keywords": [
+                "async",
+                "asynchronous",
+                "mutex",
+                "semaphore",
+                "synchronization"
+            ],
+            "time": "2020-05-07T18:57:50+00:00"
+        },
+        {
+            "name": "opis/closure",
+            "version": "3.5.5",
+            "source": {
+                "type": "git",
+                "url": "https://github.com/opis/closure.git",
+                "reference": "dec9fc5ecfca93f45cd6121f8e6f14457dff372c"
+            },
+            "dist": {
+                "type": "zip",
+                "url": "https://api.github.com/repos/opis/closure/zipball/dec9fc5ecfca93f45cd6121f8e6f14457dff372c",
+                "reference": "dec9fc5ecfca93f45cd6121f8e6f14457dff372c",
+                "shasum": ""
+            },
+            "require": {
+                "php": "^5.4 || ^7.0"
+            },
+            "require-dev": {
+                "jeremeamia/superclosure": "^2.0",
+                "phpunit/phpunit": "^4.0 || ^5.0 || ^6.0 || ^7.0"
+            },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "4.3-dev"
+                    "dev-master": "3.5.x-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "PhpParser\\": "lib/PhpParser"
-                }
+                    "Opis\\Closure\\": "src/"
+                },
+                "files": [
+                    "functions.php"
+                ]
             },
             "notification-url": "https://packagist.org/downloads/",
             "license": [
-                "BSD-3-Clause"
+                "MIT"
             ],
             "authors": [
                 {
-                    "name": "Nikita Popov"
+                    "name": "Marius Sarca",
+                    "email": "marius.sarca@gmail.com"
+                },
+                {
+                    "name": "Sorin Sarca",
+                    "email": "sarca_sorin@hotmail.com"
                 }
             ],
-            "description": "A PHP parser written in PHP",
+            "description": "A library that can be used to serialize closures (anonymous functions) and arbitrary objects.",
+            "homepage": "https://opis.io/closure",
             "keywords": [
-                "parser",
-                "php"
+                "anonymous functions",
+                "closure",
+                "function",
+                "serializable",
+                "serialization",
+                "serialize"
             ],
-            "time": "2020-04-10T16:34:50+00:00"
+            "time": "2020-06-17T14:59:55+00:00"
         },
         {
             "name": "php-di/invoker",
@@ -162,21 +537,20 @@
         },
         {
             "name": "php-di/php-di",
-            "version": "6.1.0",
+            "version": "6.2.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/PHP-DI/PHP-DI.git",
-                "reference": "69238bd49acc0eb6a967029311eeadc3f7c5d538"
+                "reference": "6875fe557c244b3830862c072c7719ca4ac2efe4"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/PHP-DI/PHP-DI/zipball/69238bd49acc0eb6a967029311eeadc3f7c5d538",
-                "reference": "69238bd49acc0eb6a967029311eeadc3f7c5d538",
+                "url": "https://api.github.com/repos/PHP-DI/PHP-DI/zipball/6875fe557c244b3830862c072c7719ca4ac2efe4",
+                "reference": "6875fe557c244b3830862c072c7719ca4ac2efe4",
                 "shasum": ""
             },
             "require": {
-                "jeremeamia/superclosure": "^2.0",
-                "nikic/php-parser": "^2.0|^3.0|^4.0",
+                "opis/closure": "^3.5.5",
                 "php": ">=7.2.0",
                 "php-di/invoker": "^2.0",
                 "php-di/phpdoc-reader": "^2.0.1",
@@ -211,7 +585,7 @@
                 "MIT"
             ],
             "description": "The dependency injection container for humans",
-            "homepage": "http://php-di.org/",
+            "homepage": "https://php-di.org/",
             "keywords": [
                 "PSR-11",
                 "container",
@@ -221,7 +595,7 @@
                 "ioc",
                 "psr11"
             ],
-            "time": "2020-04-06T09:54:49+00:00"
+            "time": "2020-06-18T09:54:32+00:00"
         },
         {
             "name": "php-di/phpdoc-reader",
@@ -311,26 +685,29 @@
         },
         {
             "name": "symfony/console",
-            "version": "v5.0.7",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/console.git",
-                "reference": "5fa1caadc8cdaa17bcfb25219f3b53fe294a9935"
+                "reference": "34ac555a3627e324b660e318daa07572e1140123"
             },
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                 "branch-alias": {
-                    "dev-master": "5.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -3316,38 +3863,34 @@
             ],
             "description": "Symfony Config Component",
             "homepage": "https://symfony.com",
-            "time": "2020-04-15T15:59:10+00:00"
+            "time": "2020-05-23T13:08:13+00:00"
         },
         {
-            "name": "symfony/filesystem",
-            "version": "v5.0.8",
+            "name": "symfony/deprecation-contracts",
+            "version": "v2.1.2",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/filesystem.git",
-                "reference": "7cd0dafc4353a0f62e307df90b48466379c8cc91"
+                "url": "https://github.com/symfony/deprecation-contracts.git",
+                "reference": "dd99cb3a0aff6cadd2a8d7d7ed72c2161e218337"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/filesystem/zipball/7cd0dafc4353a0f62e307df90b48466379c8cc91",
-                "reference": "7cd0dafc4353a0f62e307df90b48466379c8cc91",
+                "url": "https://api.github.com/repos/symfony/deprecation-contracts/zipball/dd99cb3a0aff6cadd2a8d7d7ed72c2161e218337",
+                "reference": "dd99cb3a0aff6cadd2a8d7d7ed72c2161e218337",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2.5",
-                "symfony/polyfill-ctype": "~1.8"
+                "php": ">=7.1"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "5.0-dev"
+                    "dev-master": "2.1-dev"
                 }
             },
             "autoload": {
-                "psr-4": {
-                    "Symfony\\Component\\Filesystem\\": ""
-                },
-                "exclude-from-classmap": [
-                    "/Tests/"
+                "files": [
+                    "function.php"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -3356,50 +3899,48 @@
             ],
             "authors": [
                 {
-                    "name": "Fabien Potencier",
-                    "email": "fabien@symfony.com"
+                    "name": "Nicolas Grekas",
+                    "email": "p@tchwork.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony Filesystem Component",
+            "description": "A generic function and convention to trigger deprecation notices",
             "homepage": "https://symfony.com",
-            "time": "2020-04-12T14:40:17+00:00"
+            "time": "2020-05-27T08:34:37+00:00"
         },
         {
-            "name": "symfony/polyfill-ctype",
-            "version": "v1.14.0",
+            "name": "symfony/filesystem",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
-                "url": "https://github.com/symfony/polyfill-ctype.git",
-                "reference": "fbdeaec0df06cf3d51c93de80c7eb76e271f5a38"
+                "url": "https://github.com/symfony/filesystem.git",
+                "reference": "6e4320f06d5f2cce0d96530162491f4465179157"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-ctype/zipball/fbdeaec0df06cf3d51c93de80c7eb76e271f5a38",
-                "reference": "fbdeaec0df06cf3d51c93de80c7eb76e271f5a38",
+                "url": "https://api.github.com/repos/symfony/filesystem/zipball/6e4320f06d5f2cce0d96530162491f4465179157",
+                "reference": "6e4320f06d5f2cce0d96530162491f4465179157",
                 "shasum": ""
             },
             "require": {
-                "php": ">=5.3.3"
-            },
-            "suggest": {
-                "ext-ctype": "For best performance"
+                "php": ">=7.2.5",
+                "symfony/polyfill-ctype": "~1.8"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.14-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
                 "psr-4": {
-                    "Symfony\\Polyfill\\Ctype\\": ""
+                    "Symfony\\Component\\Filesystem\\": ""
                 },
-                "files": [
-                    "bootstrap.php"
+                "exclude-from-classmap": [
+                    "/Tests/"
                 ]
             },
             "notification-url": "https://packagist.org/downloads/",
@@ -3408,36 +3949,30 @@
             ],
             "authors": [
                 {
-                    "name": "Gert de Pagter",
-                    "email": "BackEndTea@gmail.com"
+                    "name": "Fabien Potencier",
+                    "email": "fabien@symfony.com"
                 },
                 {
                     "name": "Symfony Community",
                     "homepage": "https://symfony.com/contributors"
                 }
             ],
-            "description": "Symfony polyfill for ctype functions",
+            "description": "Symfony Filesystem Component",
             "homepage": "https://symfony.com",
-            "keywords": [
-                "compatibility",
-                "ctype",
-                "polyfill",
-                "portable"
-            ],
-            "time": "2020-01-13T11:15:53+00:00"
+            "time": "2020-05-30T20:35:19+00:00"
         },
         {
             "name": "symfony/polyfill-intl-idn",
-            "version": "v1.15.0",
+            "version": "v1.17.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-intl-idn.git",
-                "reference": "47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf"
+                "reference": "3bff59ea7047e925be6b7f2059d60af31bb46d6a"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf",
-                "reference": "47bd6aa45beb1cd7c6a16b7d1810133b728bdfcf",
+                "url": "https://api.github.com/repos/symfony/polyfill-intl-idn/zipball/3bff59ea7047e925be6b7f2059d60af31bb46d6a",
+                "reference": "3bff59ea7047e925be6b7f2059d60af31bb46d6a",
                 "shasum": ""
             },
             "require": {
@@ -3451,7 +3986,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.15-dev"
+                    "dev-master": "1.17-dev"
                 }
             },
             "autoload": {
@@ -3486,20 +4021,20 @@
                 "portable",
                 "shim"
             ],
-            "time": "2020-03-09T19:04:49+00:00"
+            "time": "2020-05-12T16:47:27+00:00"
         },
         {
             "name": "symfony/polyfill-php72",
-            "version": "v1.15.0",
+            "version": "v1.17.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/polyfill-php72.git",
-                "reference": "37b0976c78b94856543260ce09b460a7bc852747"
+                "reference": "f048e612a3905f34931127360bdd2def19a5e582"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/37b0976c78b94856543260ce09b460a7bc852747",
-                "reference": "37b0976c78b94856543260ce09b460a7bc852747",
+                "url": "https://api.github.com/repos/symfony/polyfill-php72/zipball/f048e612a3905f34931127360bdd2def19a5e582",
+                "reference": "f048e612a3905f34931127360bdd2def19a5e582",
                 "shasum": ""
             },
             "require": {
@@ -3508,7 +4043,7 @@
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "1.15-dev"
+                    "dev-master": "1.17-dev"
                 }
             },
             "autoload": {
@@ -3541,30 +4076,30 @@
                 "portable",
                 "shim"
             ],
-            "time": "2020-02-27T09:26:54+00:00"
+            "time": "2020-05-12T16:47:27+00:00"
         },
         {
             "name": "symfony/stopwatch",
-            "version": "v5.0.8",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/stopwatch.git",
-                "reference": "a1d86d30d4522423afc998f32404efa34fcf5a73"
+                "reference": "0f7c58cf81dbb5dd67d423a89d577524a2ec0323"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/a1d86d30d4522423afc998f32404efa34fcf5a73",
-                "reference": "a1d86d30d4522423afc998f32404efa34fcf5a73",
+                "url": "https://api.github.com/repos/symfony/stopwatch/zipball/0f7c58cf81dbb5dd67d423a89d577524a2ec0323",
+                "reference": "0f7c58cf81dbb5dd67d423a89d577524a2ec0323",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2.5",
+                "php": ">=7.2.5",
                 "symfony/service-contracts": "^1.0|^2"
             },
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "5.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -3591,24 +4126,25 @@
             ],
             "description": "Symfony Stopwatch Component",
             "homepage": "https://symfony.com",
-            "time": "2020-03-27T16:56:45+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
         },
         {
             "name": "symfony/yaml",
-            "version": "v5.0.8",
+            "version": "v5.1.2",
             "source": {
                 "type": "git",
                 "url": "https://github.com/symfony/yaml.git",
-                "reference": "482fb4e710e5af3e0e78015f19aa716ad953392f"
+                "reference": "ea342353a3ef4f453809acc4ebc55382231d4d23"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/symfony/yaml/zipball/482fb4e710e5af3e0e78015f19aa716ad953392f",
-                "reference": "482fb4e710e5af3e0e78015f19aa716ad953392f",
+                "url": "https://api.github.com/repos/symfony/yaml/zipball/ea342353a3ef4f453809acc4ebc55382231d4d23",
+                "reference": "ea342353a3ef4f453809acc4ebc55382231d4d23",
                 "shasum": ""
             },
             "require": {
-                "php": "^7.2.5",
+                "php": ">=7.2.5",
+                "symfony/deprecation-contracts": "^2.1",
                 "symfony/polyfill-ctype": "~1.8"
             },
             "conflict": {
@@ -3620,10 +4156,13 @@
             "suggest": {
                 "symfony/console": "For validating YAML files using the lint command"
             },
+            "bin": [
+                "Resources/bin/yaml-lint"
+            ],
             "type": "library",
             "extra": {
                 "branch-alias": {
-                    "dev-master": "5.0-dev"
+                    "dev-master": "5.1-dev"
                 }
             },
             "autoload": {
@@ -3650,7 +4189,7 @@
             ],
             "description": "Symfony Yaml Component",
             "homepage": "https://symfony.com",
-            "time": "2020-04-28T17:58:55+00:00"
+            "time": "2020-05-20T17:43:50+00:00"
         },
         {
             "name": "theseer/tokenizer",
@@ -3694,22 +4233,22 @@
         },
         {
             "name": "vimeo/psalm",
-            "version": "3.11.5",
+            "version": "3.11.6",
             "source": {
                 "type": "git",
                 "url": "https://github.com/vimeo/psalm.git",
-                "reference": "3c60609c218d4d4b3b257728b8089094e5c6c6c2"
+                "reference": "7fc1f50f54bd6b174b1c43a37c1b0b151915d55c"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/vimeo/psalm/zipball/3c60609c218d4d4b3b257728b8089094e5c6c6c2",
-                "reference": "3c60609c218d4d4b3b257728b8089094e5c6c6c2",
+                "url": "https://api.github.com/repos/vimeo/psalm/zipball/7fc1f50f54bd6b174b1c43a37c1b0b151915d55c",
+                "reference": "7fc1f50f54bd6b174b1c43a37c1b0b151915d55c",
                 "shasum": ""
             },
             "require": {
                 "amphp/amp": "^2.1",
                 "amphp/byte-stream": "^1.5",
-                "composer/semver": "^1.4",
+                "composer/semver": "^1.4 || ^2.0 || ^3.0",
                 "composer/xdebug-handler": "^1.1",
                 "ext-dom": "*",
                 "ext-json": "*",
@@ -3787,20 +4326,20 @@
                 "inspection",
                 "php"
             ],
-            "time": "2020-05-27T15:12:09+00:00"
+            "time": "2020-06-17T20:40:35+00:00"
         },
         {
             "name": "webmozart/assert",
-            "version": "1.7.0",
+            "version": "1.9.0",
             "source": {
                 "type": "git",
                 "url": "https://github.com/webmozart/assert.git",
-                "reference": "aed98a490f9a8f78468232db345ab9cf606cf598"
+                "reference": "9dc4f203e36f2b486149058bade43c851dd97451"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/webmozart/assert/zipball/aed98a490f9a8f78468232db345ab9cf606cf598",
-                "reference": "aed98a490f9a8f78468232db345ab9cf606cf598",
+                "url": "https://api.github.com/repos/webmozart/assert/zipball/9dc4f203e36f2b486149058bade43c851dd97451",
+                "reference": "9dc4f203e36f2b486149058bade43c851dd97451",
                 "shasum": ""
             },
             "require": {
@@ -3808,7 +4347,8 @@
                 "symfony/polyfill-ctype": "^1.8"
             },
             "conflict": {
-                "vimeo/psalm": "<3.6.0"
+                "phpstan/phpstan": "<0.12.20",
+                "vimeo/psalm": "<3.9.1"
             },
             "require-dev": {
                 "phpunit/phpunit": "^4.8.36 || ^7.5.13"
@@ -3835,7 +4375,7 @@
                 "check",
                 "validate"
             ],
-            "time": "2020-02-14T12:15:55+00:00"
+            "time": "2020-06-16T10:16:42+00:00"
         },
         {
             "name": "webmozart/glob",
@@ -3941,7 +4481,8 @@
     "platform": {
         "php": "^7.4",
         "ext-ffi": "*",
-        "ext-pcntl": "*"
+        "ext-pcntl": "*",
+        "ext-filter": "*"
     },
     "platform-dev": {
         "ext-posix": "*"
diff --git a/src/Command/Inspector/DaemonCommand.php b/src/Command/Inspector/DaemonCommand.php
new file mode 100644
index 00000000..f3e7d6f4
--- /dev/null
+++ b/src/Command/Inspector/DaemonCommand.php
@@ -0,0 +1,185 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Command\Inspector;
+
+use Amp\Loop;
+use Amp\Promise;
+use PhpProfiler\Inspector\Daemon\Dispatcher\DispatchTable;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\TraceMessage;
+use PhpProfiler\Inspector\Daemon\Dispatcher\WorkerPool;
+use PhpProfiler\Inspector\Daemon\Reader\Context\PhpReaderContextCreator;
+use PhpProfiler\Inspector\Daemon\Searcher\Context\PhpSearcherContextCreator;
+use PhpProfiler\Inspector\Settings\DaemonSettings;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+
+final class DaemonCommand extends Command
+{
+    private PhpSearcherContextCreator $php_searcher_context_creator;
+    private PhpReaderContextCreator $php_reader_context_creator;
+
+    public function __construct(
+        PhpSearcherContextCreator $php_searcher_context_creator,
+        PhpReaderContextCreator $php_reader_context_creator
+    ) {
+        parent::__construct();
+        $this->php_reader_context_creator = $php_reader_context_creator;
+        $this->php_searcher_context_creator = $php_searcher_context_creator;
+    }
+
+    public function configure(): void
+    {
+        $this->setName('inspector:daemon')
+            ->setDescription('periodically get running function name from an outer process or thread')
+            ->addOption(
+                'target-regex',
+                'P',
+                InputOption::VALUE_OPTIONAL,
+                'regex to find the php binary loaded in the target process'
+            )
+            ->addOption('depth', 'd', InputOption::VALUE_OPTIONAL, 'max depth')
+            ->addOption(
+                'sleep-ns',
+                's',
+                InputOption::VALUE_OPTIONAL,
+                'nanoseconds between traces (default: 1000 * 1000 * 10)'
+            )
+            ->addOption(
+                'max-retries',
+                'r',
+                InputOption::VALUE_OPTIONAL,
+                'max retries on contiguous errors of read (default: 10)'
+            )
+            ->addOption(
+                'threads',
+                'T',
+                InputOption::VALUE_OPTIONAL,
+                'number of workers (default: 8)'
+            )
+            ->addOption(
+                'php-regex',
+                null,
+                InputOption::VALUE_OPTIONAL,
+                'regex to find the php binary loaded in the target process'
+            )
+            ->addOption(
+                'libpthread-regex',
+                null,
+                InputOption::VALUE_OPTIONAL,
+                'regex to find the libpthread.so loaded in the target process'
+            )
+            ->addOption(
+                'php-version',
+                null,
+                InputOption::VALUE_OPTIONAL,
+                'php version of the target'
+            )
+            ->addOption(
+                'php-path',
+                null,
+                InputOption::VALUE_OPTIONAL,
+                'path to the php binary (only needed in tracing chrooted ZTS target)'
+            )
+            ->addOption(
+                'libpthread-path',
+                null,
+                InputOption::VALUE_OPTIONAL,
+                'path to the libpthread.so (only needed in tracing chrooted ZTS target)'
+            )
+        ;
+    }
+
+    /**
+     * @param InputInterface $input
+     * @param OutputInterface $output
+     * @return int
+     */
+    public function execute(InputInterface $input, OutputInterface $output): int
+    {
+        $target_php_settings = TargetPhpSettings::fromConsoleInput($input);
+        $loop_settings = TraceLoopSettings::fromConsoleInput($input);
+        $get_trace_settings = GetTraceSettings::fromConsoleInput($input);
+        $daemon_settings = DaemonSettings::fromConsoleInput($input);
+
+        $searcher_context = $this->php_searcher_context_creator->create();
+        Promise\wait($searcher_context->start());
+        Promise\wait($searcher_context->sendTargetRegex($daemon_settings->target_regex));
+
+        $worker_pool = WorkerPool::create(
+            $this->php_reader_context_creator,
+            $daemon_settings->threads,
+            $target_php_settings,
+            $loop_settings,
+            $get_trace_settings
+        );
+
+        $dispatch_table = new DispatchTable(
+            $worker_pool,
+            $target_php_settings,
+            $loop_settings,
+            $get_trace_settings
+        );
+
+        exec('stty -icanon -echo');
+
+        Loop::run(function () use ($dispatch_table, $searcher_context, $worker_pool, $output) {
+            Loop::onReadable(
+                STDIN,
+                /** @param resource $stream */
+                function (string $watcher_id, $stream) {
+                    $key = fread($stream, 1);
+                    if ($key === 'q') {
+                        Loop::cancel($watcher_id);
+                        Loop::stop();
+                    }
+                }
+            );
+            Loop::repeat(10, function () use ($dispatch_table, $searcher_context, $worker_pool, $output) {
+                $promises = [];
+                static $searcher_on_read = false;
+                if (!$searcher_on_read) {
+                    $promises[] = \Amp\call(function () use ($searcher_context, $dispatch_table, &$searcher_on_read) {
+                        $searcher_on_read = true;
+                        $update_target_message = yield $searcher_context->receivePidList();
+                        $dispatch_table->updateTargets($update_target_message->target_process_list);
+                        $searcher_on_read = false;
+                    });
+                }
+                $readers = $worker_pool->getReadableWorkers();
+                foreach ($readers as $pid => $reader) {
+                    $promises[] = \Amp\call(
+                        function () use ($reader, $pid, $worker_pool, $dispatch_table, $output) {
+                            $worker_pool->setOnRead($pid);
+                            $result = yield $reader->receiveTrace();
+                            $worker_pool->releaseOnRead($pid);
+                            if ($result instanceof TraceMessage) {
+                                $output->write($result->trace);
+                            } else {
+                                $dispatch_table->releaseOne($result->pid);
+                            }
+                        }
+                    );
+                }
+                yield $promises;
+            });
+        });
+
+        return 0;
+    }
+}
diff --git a/src/Command/Inspector/GetCurrentFunctionNameCommand.php b/src/Command/Inspector/GetCurrentFunctionNameCommand.php
index 6e743200..bae335b6 100644
--- a/src/Command/Inspector/GetCurrentFunctionNameCommand.php
+++ b/src/Command/Inspector/GetCurrentFunctionNameCommand.php
@@ -13,9 +13,11 @@
 
 namespace PhpProfiler\Command\Inspector;
 
-use PhpProfiler\Command\CommandSettingsException;
-use PhpProfiler\Command\Inspector\Settings\LoopSettings;
-use PhpProfiler\Command\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\TraceLoopProvider;
 use PhpProfiler\Lib\Elf\Parser\ElfParserException;
 use PhpProfiler\Lib\Elf\Process\ProcessSymbolReaderException;
 use PhpProfiler\Lib\Elf\Tls\TlsFinderException;
@@ -109,22 +111,22 @@ public function configure(): void
      * @throws ProcessSymbolReaderException
      * @throws ElfParserException
      * @throws TlsFinderException
-     * @throws CommandSettingsException
+     * @throws InspectorSettingsException
      */
     public function execute(InputInterface $input, OutputInterface $output): int
     {
         $target_process_settings = TargetProcessSettings::fromConsoleInput($input);
-        $loop_settings = LoopSettings::fromConsoleInput($input);
+        $target_php_settings = TargetPhpSettings::fromConsoleInput($input);
+        $loop_settings = TraceLoopSettings::fromConsoleInput($input);
 
-        $pid = $target_process_settings->pid;
-        $eg_address = $this->php_globals_finder->findExecutorGlobals($target_process_settings);
+        $eg_address = $this->php_globals_finder->findExecutorGlobals($target_process_settings, $target_php_settings);
 
         $this->loop_provider->getMainLoop(
-            function () use ($target_process_settings, $eg_address, $output): bool {
+            function () use ($target_process_settings, $target_php_settings, $eg_address, $output): bool {
                 $output->writeln(
                     $this->executor_globals_reader->readCurrentFunctionName(
                         $target_process_settings->pid,
-                        $target_process_settings->php_version,
+                        $target_php_settings->php_version,
                         $eg_address
                     )
                 );
diff --git a/src/Command/Inspector/GetEgAddressCommand.php b/src/Command/Inspector/GetEgAddressCommand.php
index c66d1323..7b52e944 100644
--- a/src/Command/Inspector/GetEgAddressCommand.php
+++ b/src/Command/Inspector/GetEgAddressCommand.php
@@ -13,8 +13,9 @@
 
 namespace PhpProfiler\Command\Inspector;
 
-use PhpProfiler\Command\CommandSettingsException;
-use PhpProfiler\Command\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
 use PhpProfiler\Lib\Elf\Parser\ElfParserException;
 use PhpProfiler\Lib\Elf\Tls\TlsFinderException;
 use PhpProfiler\Lib\PhpProcessReader\PhpGlobalsFinder;
@@ -91,14 +92,18 @@ public function configure(): void
      * @throws ProcessSymbolReaderException
      * @throws ElfParserException
      * @throws TlsFinderException
-     * @throws CommandSettingsException
+     * @throws InspectorSettingsException
      */
     public function execute(InputInterface $input, OutputInterface $output): int
     {
         $target_process_settings = TargetProcessSettings::fromConsoleInput($input);
+        $target_php_settings = TargetPhpSettings::fromConsoleInput($input);
 
         $output->writeln(
-            '0x' . dechex($this->php_globals_finder->findExecutorGlobals($target_process_settings))
+            sprintf(
+                '0x%s',
+                dechex($this->php_globals_finder->findExecutorGlobals($target_process_settings, $target_php_settings))
+            )
         );
 
         return 0;
diff --git a/src/Command/Inspector/GetTraceCommand.php b/src/Command/Inspector/GetTraceCommand.php
index 29dd56f7..300d0ee3 100644
--- a/src/Command/Inspector/GetTraceCommand.php
+++ b/src/Command/Inspector/GetTraceCommand.php
@@ -13,10 +13,12 @@
 
 namespace PhpProfiler\Command\Inspector;
 
-use PhpProfiler\Command\CommandSettingsException;
-use PhpProfiler\Command\Inspector\Settings\GetTraceSettings;
-use PhpProfiler\Command\Inspector\Settings\LoopSettings;
-use PhpProfiler\Command\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\TraceLoopProvider;
 use PhpProfiler\Lib\Elf\Parser\ElfParserException;
 use PhpProfiler\Lib\Elf\Process\ProcessSymbolReaderException;
 use PhpProfiler\Lib\Elf\Tls\TlsFinderException;
@@ -111,21 +113,28 @@ public function configure(): void
      * @throws ProcessSymbolReaderException
      * @throws ElfParserException
      * @throws TlsFinderException
-     * @throws CommandSettingsException
+     * @throws InspectorSettingsException
      */
     public function execute(InputInterface $input, OutputInterface $output): int
     {
         $target_process_settings = TargetProcessSettings::fromConsoleInput($input);
-        $loop_settings = LoopSettings::fromConsoleInput($input);
+        $target_php_settings = TargetPhpSettings::fromConsoleInput($input);
+        $loop_settings = TraceLoopSettings::fromConsoleInput($input);
         $get_trace_settings = GetTraceSettings::fromConsoleInput($input);
 
-        $eg_address = $this->php_globals_finder->findExecutorGlobals($target_process_settings);
+        $eg_address = $this->php_globals_finder->findExecutorGlobals($target_process_settings, $target_php_settings);
 
         $this->loop_provider->getMainLoop(
-            function () use ($get_trace_settings, $target_process_settings, $eg_address, $output): bool {
+            function () use (
+                $get_trace_settings,
+                $target_process_settings,
+                $target_php_settings,
+                $eg_address,
+                $output
+            ): bool {
                 $call_trace = $this->executor_globals_reader->readCallTrace(
                     $target_process_settings->pid,
-                    $target_process_settings->php_version,
+                    $target_php_settings->php_version,
                     $eg_address,
                     $get_trace_settings->depth
                 );
diff --git a/src/Command/Inspector/TraceLoopProvider.php b/src/Command/Inspector/TraceLoopProvider.php
deleted file mode 100644
index c6476b69..00000000
--- a/src/Command/Inspector/TraceLoopProvider.php
+++ /dev/null
@@ -1,42 +0,0 @@
-<?php
-
-/**
- * This file is part of the sj-i/php-profiler package.
- *
- * (c) sji <sji@sj-i.dev>
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace PhpProfiler\Command\Inspector;
-
-use PhpProfiler\Command\Inspector\Settings\LoopSettings;
-use PhpProfiler\Lib\Loop\Loop;
-use PhpProfiler\Lib\Loop\LoopBuilder;
-use PhpProfiler\Lib\Loop\LoopProcess\CallableLoop;
-use PhpProfiler\Lib\Loop\LoopProcess\KeyboardCancelLoop;
-use PhpProfiler\Lib\Loop\LoopProcess\NanoSleepLoop;
-use PhpProfiler\Lib\Loop\LoopProcess\RetryOnExceptionLoop;
-use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderException;
-
-final class TraceLoopProvider
-{
-    private LoopBuilder $loop_builder;
-
-    public function __construct(LoopBuilder $loop_builder)
-    {
-        $this->loop_builder = $loop_builder;
-    }
-
-    public function getMainLoop(callable $main, LoopSettings $settings): Loop
-    {
-        return $this->loop_builder->addProcess(NanoSleepLoop::class, [$settings->sleep_nano_seconds])
-            ->addProcess(RetryOnExceptionLoop::class, [$settings->max_retries, [MemoryReaderException::class]])
-            ->addProcess(KeyboardCancelLoop::class, [$settings->cancel_key])
-            ->addProcess(CallableLoop::class, [$main])
-            ->build();
-    }
-}
diff --git a/src/Inspector/Daemon/Dispatcher/DispatchTable.php b/src/Inspector/Daemon/Dispatcher/DispatchTable.php
new file mode 100644
index 00000000..17ec422a
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/DispatchTable.php
@@ -0,0 +1,75 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher;
+
+use PhpProfiler\Inspector\Daemon\Reader\Context\PhpReaderContext;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+
+final class DispatchTable
+{
+    private WorkerPool $worker_pool;
+    private TargetProcessList $assigned;
+    private TargetPhpSettings $target_php_settings;
+    private TraceLoopSettings $trace_loop_settings;
+    private GetTraceSettings $get_trace_settings;
+    /** @var array<int, PhpReaderContext> */
+    private array $dispatch_table = [];
+
+    public function __construct(
+        WorkerPool $worker_pool,
+        TargetPhpSettings $target_php_settings,
+        TraceLoopSettings $trace_loop_settings,
+        GetTraceSettings $get_trace_settings
+    ) {
+        $this->worker_pool = $worker_pool;
+        $this->target_php_settings = $target_php_settings;
+        $this->trace_loop_settings = $trace_loop_settings;
+        $this->get_trace_settings = $get_trace_settings;
+        $this->assigned = new TargetProcessList();
+    }
+
+    public function updateTargets(TargetProcessList $update): void
+    {
+        $diff = $this->assigned->getDiff($update);
+        $this->release($diff);
+        $this->assigned = $this->assigned->getDiff($diff);
+        $unassigned_new = $update->getDiff($this->assigned);
+        for ($worker = $this->worker_pool->getFreeWorker(); $worker; $worker = $this->worker_pool->getFreeWorker()) {
+            $picked = $unassigned_new->pickOne();
+            if (is_null($picked)) {
+                break;
+            }
+            $this->assigned->putOne($picked);
+            $this->dispatch_table[$picked] = $worker;
+            $worker->sendAttach($picked);
+        }
+    }
+
+    public function release(TargetProcessList $targets): void
+    {
+        foreach ($targets->getArray() as $pid) {
+            $this->releaseOne($pid);
+        }
+    }
+
+    public function releaseOne(int $pid): void
+    {
+        $worker = $this->dispatch_table[$pid];
+        $this->worker_pool->returnWorkerToPool($worker);
+        unset($this->dispatch_table[$pid]);
+        $this->assigned = $this->assigned->getDiff(new TargetProcessList($pid));
+    }
+}
diff --git a/src/Inspector/Daemon/Dispatcher/Message/DetachWorkerMessage.php b/src/Inspector/Daemon/Dispatcher/Message/DetachWorkerMessage.php
new file mode 100644
index 00000000..41005594
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/Message/DetachWorkerMessage.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher\Message;
+
+final class DetachWorkerMessage
+{
+    public int $pid;
+
+    public function __construct(int $pid)
+    {
+        $this->pid = $pid;
+    }
+}
diff --git a/src/Inspector/Daemon/Dispatcher/Message/TraceMessage.php b/src/Inspector/Daemon/Dispatcher/Message/TraceMessage.php
new file mode 100644
index 00000000..5663771b
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/Message/TraceMessage.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher\Message;
+
+final class TraceMessage
+{
+    public string $trace;
+
+    public function __construct(string $trace)
+    {
+        $this->trace = $trace;
+    }
+}
diff --git a/src/Inspector/Daemon/Dispatcher/Message/UpdateTargetProcessMessage.php b/src/Inspector/Daemon/Dispatcher/Message/UpdateTargetProcessMessage.php
new file mode 100644
index 00000000..9ac9d53b
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/Message/UpdateTargetProcessMessage.php
@@ -0,0 +1,26 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher\Message;
+
+use PhpProfiler\Inspector\Daemon\Dispatcher\TargetProcessList;
+
+final class UpdateTargetProcessMessage
+{
+    public TargetProcessList $target_process_list;
+
+    public function __construct(TargetProcessList $target_process_list)
+    {
+        $this->target_process_list = $target_process_list;
+    }
+}
diff --git a/src/Inspector/Daemon/Dispatcher/TargetProcessList.php b/src/Inspector/Daemon/Dispatcher/TargetProcessList.php
new file mode 100644
index 00000000..8e3f4ae4
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/TargetProcessList.php
@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher;
+
+final class TargetProcessList
+{
+    /** @var int[] */
+    private array $pid_list;
+
+    public function __construct(int ...$pid_list)
+    {
+        $this->pid_list = $pid_list;
+    }
+
+    public function pickOne(): ?int
+    {
+        return array_pop($this->pid_list);
+    }
+
+    public function putOne(int $pid): void
+    {
+        $this->pid_list[] = $pid;
+    }
+
+    public function getDiff(TargetProcessList $compare_list): self
+    {
+        return new self(...array_diff($this->pid_list, $compare_list->pid_list));
+    }
+
+    /**
+     * @return int[]
+     */
+    public function getArray(): array
+    {
+        return $this->pid_list;
+    }
+}
diff --git a/src/Inspector/Daemon/Dispatcher/WorkerPool.php b/src/Inspector/Daemon/Dispatcher/WorkerPool.php
new file mode 100644
index 00000000..765c2cc8
--- /dev/null
+++ b/src/Inspector/Daemon/Dispatcher/WorkerPool.php
@@ -0,0 +1,110 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Dispatcher;
+
+use PhpProfiler\Inspector\Daemon\Reader\Context\PhpReaderContext;
+use PhpProfiler\Inspector\Daemon\Reader\Context\PhpReaderContextCreator;
+use Amp\Promise;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+
+final class WorkerPool
+{
+    /** @var array<int, PhpReaderContext> */
+    private array $contexts;
+
+    /** @var array<int, bool> */
+    private array $is_free_list;
+
+    /** @var array<int, bool> */
+    private array $on_read_list;
+
+    public function __construct(PhpReaderContext ...$contexts)
+    {
+        $this->contexts = $contexts;
+        $this->is_free_list = array_fill(0, count($contexts), true);
+        $this->on_read_list = array_fill(0, count($contexts), false);
+    }
+
+    public static function create(
+        PhpReaderContextCreator $creator,
+        int $number,
+        TargetPhpSettings $target_php_settings,
+        TraceLoopSettings $loop_settings,
+        GetTraceSettings $get_trace_settings
+    ): self {
+        $contexts = [];
+        $started = [];
+        for ($i = 0; $i < $number; $i++) {
+            $context = $creator->create();
+            $started[] = $context->start();
+            $contexts[] = $context;
+        }
+        Promise\wait(Promise\all($started));
+        $send_settings = [];
+        for ($i = 0; $i < $number; $i++) {
+            $send_settings[] = $contexts[$i]->sendSettings(
+                $target_php_settings,
+                $loop_settings,
+                $get_trace_settings
+            );
+        }
+        Promise\wait(Promise\all($send_settings));
+
+        return new self(...$contexts);
+    }
+
+    public function getFreeWorker(): ?PhpReaderContext
+    {
+        foreach ($this->contexts as $key => $context) {
+            if ($this->is_free_list[$key]) {
+                $this->is_free_list[$key] = false;
+                return $context;
+            }
+        }
+        return null;
+    }
+
+    /**
+     * @return iterable<int, PhpReaderContext>
+     */
+    public function getReadableWorkers(): iterable
+    {
+        foreach ($this->contexts as $key => $context) {
+            if (!$this->is_free_list[$key] and !$this->on_read_list[$key]) {
+                yield $key => $context;
+            }
+        }
+    }
+
+    public function returnWorkerToPool(PhpReaderContext $context_to_return): void
+    {
+        foreach ($this->contexts as $key => $context) {
+            if ($context === $context_to_return) {
+                $this->is_free_list[$key] = true;
+            }
+        }
+    }
+
+    public function setOnRead(int $pid): void
+    {
+        $this->on_read_list[$pid] = true;
+    }
+
+    public function releaseOnRead(int $pid): void
+    {
+        $this->on_read_list[$pid] = false;
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/Context/PhpReaderContext.php b/src/Inspector/Daemon/Reader/Context/PhpReaderContext.php
new file mode 100644
index 00000000..688536c6
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/Context/PhpReaderContext.php
@@ -0,0 +1,87 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader\Context;
+
+use Amp\Parallel\Context;
+use Amp\Promise;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\DetachWorkerMessage;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\TraceMessage;
+use PhpProfiler\Inspector\Daemon\Reader\Message\AttachMessage;
+use PhpProfiler\Inspector\Daemon\Reader\Message\SetSettingsMessage;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+
+final class PhpReaderContext
+{
+    private Context\Context $context;
+
+    public function __construct(Context\Context $context)
+    {
+        $this->context = $context;
+    }
+
+    public function start(): Promise
+    {
+        return $this->context->start();
+    }
+
+    /**
+     * @param TargetPhpSettings $target_php_settings
+     * @param TraceLoopSettings $loop_settings
+     * @param GetTraceSettings $get_trace_settings
+     * @return Promise<int>
+     */
+    public function sendSettings(
+        TargetPhpSettings $target_php_settings,
+        TraceLoopSettings $loop_settings,
+        GetTraceSettings $get_trace_settings
+    ): Promise {
+        /** @var Promise<int> */
+        return $this->context->send(
+            new SetSettingsMessage(
+                $target_php_settings,
+                $loop_settings,
+                $get_trace_settings
+            )
+        );
+    }
+
+    /**
+     * @param int $pid
+     * @return Promise<int>
+     */
+    public function sendAttach(int $pid): Promise
+    {
+        /** @var Promise<int> */
+        return $this->context->send(
+            new AttachMessage($pid)
+        );
+    }
+
+    public function isRunning(): bool
+    {
+        return $this->context->isRunning();
+    }
+
+    /**
+     * @return Promise<TraceMessage|DetachWorkerMessage>
+     * @psalm-yield Promise<TraceMessage|DetachWorkerMessage>
+     */
+    public function receiveTrace(): Promise
+    {
+        /** @var Promise<TraceMessage|DetachWorkerMessage> */
+        return $this->context->receive();
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/Context/PhpReaderContextCreator.php b/src/Inspector/Daemon/Reader/Context/PhpReaderContextCreator.php
new file mode 100644
index 00000000..eb27dca8
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/Context/PhpReaderContextCreator.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader\Context;
+
+use Amp\Parallel\Context;
+
+final class PhpReaderContextCreator
+{
+    public function create(): PhpReaderContext
+    {
+        return new PhpReaderContext(Context\create(__DIR__ . '/php-reader.php'));
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/Context/php-reader.php b/src/Inspector/Daemon/Reader/Context/php-reader.php
new file mode 100644
index 00000000..c87a0180
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/Context/php-reader.php
@@ -0,0 +1,51 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+use Amp\Parallel\Sync\Channel;
+use DI\ContainerBuilder;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\DetachWorkerMessage;
+use PhpProfiler\Inspector\Daemon\Reader\Message\AttachMessage;
+use PhpProfiler\Inspector\Daemon\Reader\Message\SetSettingsMessage;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Daemon\Reader\PhpReaderTask;
+
+return function (Channel $channel): \Generator {
+
+    $container = (new ContainerBuilder())->addDefinitions(__DIR__ . '/../../../../../config/di.php')->build();
+
+    /** @var PhpReaderTask $reader */
+    $reader = $container->make(PhpReaderTask::class, ['channel' => $channel]);
+
+    /** @var SetSettingsMessage $set_settings_message */
+    $set_settings_message = yield $channel->receive();
+
+    while (1) {
+        /** @var AttachMessage $attach_message */
+        $attach_message = yield $channel->receive();
+
+        $target_process_settings = new TargetProcessSettings(
+            $attach_message->pid
+        );
+
+        yield from $reader->run(
+            $target_process_settings,
+            $set_settings_message->trace_loop_settings,
+            $set_settings_message->target_php_settings,
+            $set_settings_message->get_trace_settings
+        );
+
+        yield $channel->send(
+            new DetachWorkerMessage($attach_message->pid)
+        );
+    }
+};
diff --git a/src/Inspector/Daemon/Reader/Message/AttachMessage.php b/src/Inspector/Daemon/Reader/Message/AttachMessage.php
new file mode 100644
index 00000000..9fc37501
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/Message/AttachMessage.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader\Message;
+
+final class AttachMessage
+{
+    public int $pid;
+
+    public function __construct(int $pid)
+    {
+        $this->pid = $pid;
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/Message/SetSettingsMessage.php b/src/Inspector/Daemon/Reader/Message/SetSettingsMessage.php
new file mode 100644
index 00000000..92916b75
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/Message/SetSettingsMessage.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader\Message;
+
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+
+final class SetSettingsMessage
+{
+    public TargetPhpSettings $target_php_settings;
+    public TraceLoopSettings $trace_loop_settings;
+    public GetTraceSettings $get_trace_settings;
+
+    public function __construct(
+        TargetPhpSettings $target_php_settings,
+        TraceLoopSettings $trace_loop_settings,
+        GetTraceSettings $get_trace_settings
+    ) {
+        $this->target_php_settings = $target_php_settings;
+        $this->trace_loop_settings = $trace_loop_settings;
+        $this->get_trace_settings = $get_trace_settings;
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/PhpReaderTask.php b/src/Inspector/Daemon/Reader/PhpReaderTask.php
new file mode 100644
index 00000000..b86c5169
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/PhpReaderTask.php
@@ -0,0 +1,74 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader;
+
+use Amp\Parallel\Sync\Channel;
+use Generator;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\TraceMessage;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PhpProfiler\Lib\PhpProcessReader\PhpGlobalsFinder;
+use PhpProfiler\Lib\PhpProcessReader\PhpMemoryReader\ExecutorGlobalsReader;
+
+final class PhpReaderTask
+{
+    private Channel $channel;
+    private PhpGlobalsFinder $php_globals_finder;
+    private ExecutorGlobalsReader $executor_globals_reader;
+    private ReaderLoopProvider $reader_loop_provider;
+
+    public function __construct(
+        Channel $channel,
+        PhpGlobalsFinder $php_globals_finder,
+        ExecutorGlobalsReader $executor_globals_reader,
+        ReaderLoopProvider $reader_loop_provider
+    ) {
+        $this->channel = $channel;
+        $this->php_globals_finder = $php_globals_finder;
+        $this->executor_globals_reader = $executor_globals_reader;
+        $this->reader_loop_provider = $reader_loop_provider;
+    }
+
+    public function run(
+        TargetProcessSettings $target_process_settings,
+        TraceLoopSettings $loop_settings,
+        TargetPhpSettings $target_php_settings,
+        GetTraceSettings $get_trace_settings
+    ): Generator {
+        $eg_address = $this->php_globals_finder->findExecutorGlobals($target_process_settings, $target_php_settings);
+
+        $loop = $this->reader_loop_provider->getMainLoop(
+            function () use (
+                $get_trace_settings,
+                $target_process_settings,
+                $target_php_settings,
+                $eg_address
+            ): \Generator {
+                $call_trace = $this->executor_globals_reader->readCallTrace(
+                    $target_process_settings->pid,
+                    $target_php_settings->php_version,
+                    $eg_address,
+                    $get_trace_settings->depth
+                );
+                yield $this->channel->send(
+                    new TraceMessage(join(PHP_EOL, $call_trace) . PHP_EOL)
+                );
+            },
+            $loop_settings
+        );
+        yield from $loop->invoke();
+    }
+}
diff --git a/src/Inspector/Daemon/Reader/ReaderLoopProvider.php b/src/Inspector/Daemon/Reader/ReaderLoopProvider.php
new file mode 100644
index 00000000..e0e641b1
--- /dev/null
+++ b/src/Inspector/Daemon/Reader/ReaderLoopProvider.php
@@ -0,0 +1,47 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader;
+
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PhpProfiler\Lib\Loop\AsyncLoop;
+use PhpProfiler\Lib\Loop\AsyncLoopBuilder;
+use PhpProfiler\Lib\Loop\AsyncLoopMiddleware\CallableMiddlewareAsync;
+use PhpProfiler\Lib\Loop\AsyncLoopMiddleware\NanoSleepMiddlewareAsync;
+use PhpProfiler\Lib\Loop\AsyncLoopMiddleware\RetryOnExceptionMiddlewareAsync;
+use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderException;
+
+final class ReaderLoopProvider
+{
+    private AsyncLoopBuilder $loop_builder;
+
+    public function __construct(AsyncLoopBuilder $loop_builder)
+    {
+        $this->loop_builder = $loop_builder;
+    }
+
+    public function getMainLoop(callable $main, TraceLoopSettings $settings): AsyncLoop
+    {
+        return $this->loop_builder
+            ->addProcess(
+                RetryOnExceptionMiddlewareAsync::class,
+                [
+                    $settings->max_retries,
+                    [MemoryReaderException::class]
+                ]
+            )
+            ->addProcess(NanoSleepMiddlewareAsync::class, [$settings->sleep_nano_seconds])
+            ->addProcess(CallableMiddlewareAsync::class, [$main])
+            ->build();
+    }
+}
diff --git a/src/Inspector/Daemon/Searcher/Context/PhpSearcherContext.php b/src/Inspector/Daemon/Searcher/Context/PhpSearcherContext.php
new file mode 100644
index 00000000..8b14c085
--- /dev/null
+++ b/src/Inspector/Daemon/Searcher/Context/PhpSearcherContext.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Searcher\Context;
+
+use Amp\Parallel\Context;
+use Amp\Promise;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\UpdateTargetProcessMessage;
+
+final class PhpSearcherContext
+{
+    private Context\Context $context;
+
+    public function __construct(Context\Context $context)
+    {
+        $this->context = $context;
+    }
+
+    /**
+     * @return Promise<null>
+     */
+    public function start(): Promise
+    {
+        return $this->context->start();
+    }
+
+    /**
+     * @param string $regex
+     * @return Promise<int>
+     */
+    public function sendTargetRegex(string $regex): Promise
+    {
+        /** @var Promise<int> */
+        return $this->context->send($regex);
+    }
+
+    /**
+     * @return Promise<UpdateTargetProcessMessage>
+     * @psalm-yield Promise<UpdateTargetProcessMessage>
+     */
+    public function receivePidList(): Promise
+    {
+        /** @var Promise<UpdateTargetProcessMessage> */
+        return $this->context->receive();
+    }
+}
diff --git a/src/Inspector/Daemon/Searcher/Context/PhpSearcherContextCreator.php b/src/Inspector/Daemon/Searcher/Context/PhpSearcherContextCreator.php
new file mode 100644
index 00000000..d59642d8
--- /dev/null
+++ b/src/Inspector/Daemon/Searcher/Context/PhpSearcherContextCreator.php
@@ -0,0 +1,24 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Searcher\Context;
+
+use Amp\Parallel\Context;
+
+final class PhpSearcherContextCreator
+{
+    public function create(): PhpSearcherContext
+    {
+        return new PhpSearcherContext(Context\create(__DIR__ . '/php-searcher.php'));
+    }
+}
diff --git a/src/Inspector/Daemon/Searcher/Context/php-searcher.php b/src/Inspector/Daemon/Searcher/Context/php-searcher.php
new file mode 100644
index 00000000..97b9ea3a
--- /dev/null
+++ b/src/Inspector/Daemon/Searcher/Context/php-searcher.php
@@ -0,0 +1,30 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+use Amp\Parallel\Sync\Channel;
+use DI\ContainerBuilder;
+use PhpProfiler\Inspector\Daemon\Searcher\PhpSearcherTask;
+
+return function (Channel $channel): \Generator {
+    $container = (new ContainerBuilder())->addDefinitions(__DIR__ . '/../../../../../config/di.php')->build();
+
+    /** @var PhpSearcherTask $searcher */
+    $searcher = $container->make(PhpSearcherTask::class, ['channel' => $channel]);
+
+    /** @var string $target_regex */
+    $target_regex = yield $channel->receive();
+
+    while (1) {
+        yield from $searcher->run($target_regex);
+    }
+};
diff --git a/src/Inspector/Daemon/Searcher/PhpSearcherTask.php b/src/Inspector/Daemon/Searcher/PhpSearcherTask.php
new file mode 100644
index 00000000..d6dac039
--- /dev/null
+++ b/src/Inspector/Daemon/Searcher/PhpSearcherTask.php
@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Searcher;
+
+use Amp\Parallel\Sync\Channel;
+use Generator;
+use PhpProfiler\Inspector\Daemon\Dispatcher\Message\UpdateTargetProcessMessage;
+use PhpProfiler\Inspector\Daemon\Dispatcher\TargetProcessList;
+use PhpProfiler\Lib\Process\Search\ProcessSearcher;
+
+final class PhpSearcherTask
+{
+    private Channel $channel;
+    private ProcessSearcher $process_searcher;
+
+    public function __construct(Channel $channel, ProcessSearcher $process_searcher)
+    {
+        $this->channel = $channel;
+        $this->process_searcher = $process_searcher;
+    }
+
+    public function run(string $target_regex): Generator
+    {
+        while (1) {
+            yield $this->channel->send(
+                new UpdateTargetProcessMessage(
+                    new TargetProcessList(
+                        ...$this->process_searcher->searchByRegex($target_regex)
+                    )
+                )
+            );
+            sleep(1);
+        }
+    }
+}
diff --git a/src/Inspector/Settings/DaemonInspectorSettingsException.php b/src/Inspector/Settings/DaemonInspectorSettingsException.php
new file mode 100644
index 00000000..91026674
--- /dev/null
+++ b/src/Inspector/Settings/DaemonInspectorSettingsException.php
@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Settings;
+
+final class DaemonInspectorSettingsException extends InspectorSettingsException
+{
+    public const THREADS_IS_NOT_INTEGER = 1;
+    public const TARGET_REGEX_IS_NOT_STRING = 2;
+
+    protected const ERRORS = [
+        self::THREADS_IS_NOT_INTEGER => 'threads is not integer',
+        self::TARGET_REGEX_IS_NOT_STRING => 'target-regex is not string',
+    ];
+}
diff --git a/src/Inspector/Settings/DaemonSettings.php b/src/Inspector/Settings/DaemonSettings.php
new file mode 100644
index 00000000..c3ca1217
--- /dev/null
+++ b/src/Inspector/Settings/DaemonSettings.php
@@ -0,0 +1,62 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Settings;
+
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
+use Symfony\Component\Console\Input\InputInterface;
+
+final class DaemonSettings
+{
+    private const TARGET_REGEX_DEFAULT = '^php-fpm';
+
+    public string $target_regex;
+    public int $threads;
+
+    /**
+     * DaemonSettings constructor.
+     * @param string $target_regex
+     * @param int $threads
+     */
+    public function __construct(string $target_regex, int $threads)
+    {
+        $this->target_regex = $target_regex;
+        $this->threads = $threads;
+    }
+
+    /**
+     * @param InputInterface $input
+     * @return self
+     * @throws InspectorSettingsException
+     */
+    public static function fromConsoleInput(InputInterface $input): self
+    {
+        $threads = $input->getOption('threads');
+        if (is_null($threads)) {
+            $threads = 8;
+        }
+        $threads = filter_var($threads, FILTER_VALIDATE_INT);
+        if ($threads === false) {
+            throw DaemonInspectorSettingsException::create(DaemonInspectorSettingsException::THREADS_IS_NOT_INTEGER);
+        }
+
+        $target_regex = $input->getOption('target-regex') ?? self::TARGET_REGEX_DEFAULT;
+        if (!is_string($target_regex)) {
+            throw DaemonInspectorSettingsException::create(
+                DaemonInspectorSettingsException::TARGET_REGEX_IS_NOT_STRING
+            );
+        }
+
+        return new self('{' . $target_regex . '}', $threads);
+    }
+}
diff --git a/src/Command/Inspector/Settings/GetTraceSettingsException.php b/src/Inspector/Settings/GetTraceInspectorSettingsException.php
similarity index 70%
rename from src/Command/Inspector/Settings/GetTraceSettingsException.php
rename to src/Inspector/Settings/GetTraceInspectorSettingsException.php
index 40b6156d..677bcf9c 100644
--- a/src/Command/Inspector/Settings/GetTraceSettingsException.php
+++ b/src/Inspector/Settings/GetTraceInspectorSettingsException.php
@@ -11,11 +11,9 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
-
-class GetTraceSettingsException extends CommandSettingsException
+final class GetTraceInspectorSettingsException extends InspectorSettingsException
 {
     public const DEPTH_IS_NOT_INTEGER = 1;
 
diff --git a/src/Command/Inspector/Settings/GetTraceSettings.php b/src/Inspector/Settings/GetTraceSettings.php
similarity index 75%
rename from src/Command/Inspector/Settings/GetTraceSettings.php
rename to src/Inspector/Settings/GetTraceSettings.php
index 3af71c5f..77e86dc8 100644
--- a/src/Command/Inspector/Settings/GetTraceSettings.php
+++ b/src/Inspector/Settings/GetTraceSettings.php
@@ -11,12 +11,12 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
 use Symfony\Component\Console\Input\InputInterface;
 
-class GetTraceSettings
+final class GetTraceSettings
 {
     public int $depth;
 
@@ -32,7 +32,7 @@ public function __construct(int $depth)
     /**
      * @param InputInterface $input
      * @return self
-     * @throws CommandSettingsException
+     * @throws InspectorSettingsException
      */
     public static function fromConsoleInput(InputInterface $input): self
     {
@@ -42,7 +42,7 @@ public static function fromConsoleInput(InputInterface $input): self
         }
         $depth = filter_var($depth, FILTER_VALIDATE_INT);
         if ($depth === false) {
-            throw GetTraceSettingsException::create(GetTraceSettingsException::DEPTH_IS_NOT_INTEGER);
+            throw GetTraceInspectorSettingsException::create(GetTraceInspectorSettingsException::DEPTH_IS_NOT_INTEGER);
         }
         return new self($depth);
     }
diff --git a/src/Command/CommandSettingsException.php b/src/Inspector/Settings/InspectorSettingsException.php
similarity index 83%
rename from src/Command/CommandSettingsException.php
rename to src/Inspector/Settings/InspectorSettingsException.php
index 0e3864c1..eccd699e 100644
--- a/src/Command/CommandSettingsException.php
+++ b/src/Inspector/Settings/InspectorSettingsException.php
@@ -11,11 +11,11 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command;
+namespace PhpProfiler\Inspector\Settings;
 
 use LogicException;
 
-abstract class CommandSettingsException extends \Exception
+abstract class InspectorSettingsException extends \Exception
 {
     public const ERROR_NONE = 0;
 
@@ -37,7 +37,7 @@ public static function getErrors(): array
      * @param int $error_no
      * @return static
      */
-    public static function create(int $error_no): CommandSettingsException
+    public static function create(int $error_no): InspectorSettingsException
     {
         if (!isset(static::ERRORS[$error_no])) {
             throw new LogicException('wrong creation of CommandSettingException');
diff --git a/src/Command/Inspector/Settings/TargetProcessSettingsException.php b/src/Inspector/Settings/TargetPhpInspectorSettingsException.php
similarity index 72%
rename from src/Command/Inspector/Settings/TargetProcessSettingsException.php
rename to src/Inspector/Settings/TargetPhpInspectorSettingsException.php
index 5dceef24..8a3ed64e 100644
--- a/src/Command/Inspector/Settings/TargetProcessSettingsException.php
+++ b/src/Inspector/Settings/TargetPhpInspectorSettingsException.php
@@ -11,14 +11,10 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
-
-class TargetProcessSettingsException extends CommandSettingsException
+final class TargetPhpInspectorSettingsException extends InspectorSettingsException
 {
-    public const PID_NOT_SPECIFIED = 1;
-    public const PID_IS_NOT_INTEGER = 2;
     public const PHP_REGEX_IS_NOT_STRING = 3;
     public const LIBPTHREAD_REGEX_IS_NOT_STRING = 4;
     public const PHP_PATH_IS_NOT_STRING = 5;
@@ -26,8 +22,6 @@ class TargetProcessSettingsException extends CommandSettingsException
     public const TARGET_PHP_VERSION_INVALID = 7;
 
     protected const ERRORS = [
-        self::PID_NOT_SPECIFIED => 'pid is not specified',
-        self::PID_IS_NOT_INTEGER => 'pid is not integer',
         self::PHP_REGEX_IS_NOT_STRING => 'php-regex must be a string',
         self::LIBPTHREAD_REGEX_IS_NOT_STRING => 'libpthread-regex must be a string',
         self::PHP_PATH_IS_NOT_STRING => 'php-path must be a string',
diff --git a/src/Command/Inspector/Settings/TargetProcessSettings.php b/src/Inspector/Settings/TargetPhpSettings.php
similarity index 63%
rename from src/Command/Inspector/Settings/TargetProcessSettings.php
rename to src/Inspector/Settings/TargetPhpSettings.php
index 4b6f11db..45ee5c6e 100644
--- a/src/Command/Inspector/Settings/TargetProcessSettings.php
+++ b/src/Inspector/Settings/TargetPhpSettings.php
@@ -11,19 +11,17 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
 use PhpProfiler\Lib\PhpInternals\ZendTypeReader;
 use Symfony\Component\Console\Input\InputInterface;
 
-class TargetProcessSettings
+final class TargetPhpSettings
 {
     private const PHP_REGEX_DEFAULT = '.*/(php(74|7.4|80|8.0)?|php-fpm|libphp[78].*\.so)$';
     private const LIBPTHREAD_REGEX_DEFAULT = '.*/libpthread.*\.so$';
     private const TARGET_PHP_VERSION_DEFAULT = ZendTypeReader::V74;
 
-    public int $pid;
     public string $php_regex;
     public string $libpthread_regex;
     /** @psalm-var value-of<ZendTypeReader::ALL_SUPPORTED_VERSIONS> $php_version */
@@ -33,7 +31,6 @@ class TargetProcessSettings
 
     /**
      * GetTraceSettings constructor.
-     * @param int $pid
      * @param string $php_regex
      * @param string $libpthread_regex
      * @param string $php_version
@@ -42,14 +39,12 @@ class TargetProcessSettings
      * @psalm-param value-of<ZendTypeReader::ALL_SUPPORTED_VERSIONS> $php_version
      */
     public function __construct(
-        int $pid,
         string $php_regex = self::PHP_REGEX_DEFAULT,
         string $libpthread_regex = self::LIBPTHREAD_REGEX_DEFAULT,
         string $php_version = ZendTypeReader::V74,
         ?string $php_path = null,
         ?string $libpthread_path = null
     ) {
-        $this->pid = $pid;
         $this->php_regex = '{' . $php_regex . '}';
         $this->libpthread_regex = '{' . $libpthread_regex . '}';
         $this->php_version = $php_version;
@@ -57,62 +52,44 @@ public function __construct(
         $this->libpthread_path = $libpthread_path;
     }
 
-    /**
-     * @param InputInterface $input
-     * @return self
-     * @throws CommandSettingsException
-     */
     public static function fromConsoleInput(InputInterface $input): self
     {
-        $pid = $input->getOption('pid');
-        if (is_null($pid)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::PID_NOT_SPECIFIED
-            );
-        }
-        $pid = filter_var($pid, FILTER_VALIDATE_INT);
-        if ($pid === false) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::PID_NOT_SPECIFIED
-            );
-        }
-
         $php_regex = $input->getOption('php-regex') ?? self::PHP_REGEX_DEFAULT;
         if (!is_string($php_regex)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::PHP_REGEX_IS_NOT_STRING
+            throw TargetPhpInspectorSettingsException::create(
+                TargetPhpInspectorSettingsException::PHP_REGEX_IS_NOT_STRING
             );
         }
 
         $libpthread_regex = $input->getOption('libpthread-regex') ?? self::LIBPTHREAD_REGEX_DEFAULT;
         if (!is_string($libpthread_regex)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::LIBPTHREAD_REGEX_IS_NOT_STRING
+            throw TargetPhpInspectorSettingsException::create(
+                TargetPhpInspectorSettingsException::LIBPTHREAD_REGEX_IS_NOT_STRING
             );
         }
 
         $php_version = $input->getOption('php-version') ?? self::TARGET_PHP_VERSION_DEFAULT;
         if (!in_array($php_version, ZendTypeReader::ALL_SUPPORTED_VERSIONS, true)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::TARGET_PHP_VERSION_INVALID
+            throw TargetPhpInspectorSettingsException::create(
+                TargetPhpInspectorSettingsException::TARGET_PHP_VERSION_INVALID
             );
         }
         /** @psalm-var value-of<ZendTypeReader::ALL_SUPPORTED_VERSIONS> $php_version */
 
         $php_path = $input->getOption('php-path');
         if (!is_null($php_path) and !is_string($php_path)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::PHP_PATH_IS_NOT_STRING
+            throw TargetPhpInspectorSettingsException::create(
+                TargetPhpInspectorSettingsException::PHP_PATH_IS_NOT_STRING
             );
         }
 
         $libpthread_path = $input->getOption('libpthread-path');
         if (!is_null($libpthread_path) and !is_string($libpthread_path)) {
-            throw TargetProcessSettingsException::create(
-                TargetProcessSettingsException::LIBPTHREAD_PATH_IS_NOT_STRING
+            throw TargetPhpInspectorSettingsException::create(
+                TargetPhpInspectorSettingsException::LIBPTHREAD_PATH_IS_NOT_STRING
             );
         }
 
-        return new self($pid, $php_regex, $libpthread_regex, $php_version, $php_path, $libpthread_path);
+        return new self($php_regex, $libpthread_regex, $php_version, $php_path, $libpthread_path);
     }
 }
diff --git a/src/Inspector/Settings/TargetProcessInspectorSettingsException.php b/src/Inspector/Settings/TargetProcessInspectorSettingsException.php
new file mode 100644
index 00000000..20027b31
--- /dev/null
+++ b/src/Inspector/Settings/TargetProcessInspectorSettingsException.php
@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Settings;
+
+final class TargetProcessInspectorSettingsException extends InspectorSettingsException
+{
+    public const PID_NOT_SPECIFIED = 1;
+    public const PID_IS_NOT_INTEGER = 2;
+
+    protected const ERRORS = [
+        self::PID_NOT_SPECIFIED => 'pid is not specified',
+        self::PID_IS_NOT_INTEGER => 'pid is not integer',
+    ];
+}
diff --git a/src/Inspector/Settings/TargetProcessSettings.php b/src/Inspector/Settings/TargetProcessSettings.php
new file mode 100644
index 00000000..1c8012fa
--- /dev/null
+++ b/src/Inspector/Settings/TargetProcessSettings.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Settings;
+
+use PhpProfiler\Inspector\Settings\InspectorSettingsException;
+use PhpProfiler\Lib\PhpInternals\ZendTypeReader;
+use Symfony\Component\Console\Input\InputInterface;
+
+final class TargetProcessSettings
+{
+    public int $pid;
+
+    /**
+     * GetTraceSettings constructor.
+     * @param int $pid
+     */
+    public function __construct(int $pid)
+    {
+        $this->pid = $pid;
+    }
+
+    /**
+     * @param InputInterface $input
+     * @return self
+     * @throws InspectorSettingsException
+     */
+    public static function fromConsoleInput(InputInterface $input): self
+    {
+        $pid = $input->getOption('pid');
+        if (is_null($pid)) {
+            throw TargetProcessInspectorSettingsException::create(
+                TargetProcessInspectorSettingsException::PID_NOT_SPECIFIED
+            );
+        }
+        $pid = filter_var($pid, FILTER_VALIDATE_INT);
+        if ($pid === false) {
+            throw TargetProcessInspectorSettingsException::create(
+                TargetProcessInspectorSettingsException::PID_NOT_SPECIFIED
+            );
+        }
+
+        return new self($pid);
+    }
+}
diff --git a/src/Command/Inspector/Settings/LoopSettingsException.php b/src/Inspector/Settings/TraceLoopInspectorSettingsException.php
similarity index 76%
rename from src/Command/Inspector/Settings/LoopSettingsException.php
rename to src/Inspector/Settings/TraceLoopInspectorSettingsException.php
index b9f01da2..99891ade 100644
--- a/src/Command/Inspector/Settings/LoopSettingsException.php
+++ b/src/Inspector/Settings/TraceLoopInspectorSettingsException.php
@@ -11,11 +11,9 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
-
-class LoopSettingsException extends CommandSettingsException
+final class TraceLoopInspectorSettingsException extends InspectorSettingsException
 {
     public const SLEEP_NS_IS_NOT_INTEGER = 1;
     public const MAX_RETRY_IS_NOT_INTEGER = 2;
diff --git a/src/Command/Inspector/Settings/LoopSettings.php b/src/Inspector/Settings/TraceLoopSettings.php
similarity index 79%
rename from src/Command/Inspector/Settings/LoopSettings.php
rename to src/Inspector/Settings/TraceLoopSettings.php
index 9b763c0c..8f47a176 100644
--- a/src/Command/Inspector/Settings/LoopSettings.php
+++ b/src/Inspector/Settings/TraceLoopSettings.php
@@ -11,16 +11,15 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Command\Inspector\Settings;
+namespace PhpProfiler\Inspector\Settings;
 
-use PhpProfiler\Command\CommandSettingsException;
 use Symfony\Component\Console\Input\InputInterface;
 
-class LoopSettings
+final class TraceLoopSettings
 {
     private const SLEEP_NANO_SECONDS_DEFAULT = 1000 * 1000 * 10;
     private const CANCEL_KEY_DEFAULT = 'q';
-    private const MAX_RETRY_DEFAULT = -1;
+    private const MAX_RETRY_DEFAULT = 10;
 
     public int $sleep_nano_seconds;
     public string $cancel_key;
@@ -42,7 +41,7 @@ public function __construct(int $sleep_nano_seconds, string $cancel_key, int $ma
     /**
      * @param InputInterface $input
      * @return self
-     * @throws CommandSettingsException
+     * @throws InspectorSettingsException
      */
     public static function fromConsoleInput(InputInterface $input): self
     {
@@ -52,7 +51,9 @@ public static function fromConsoleInput(InputInterface $input): self
         }
         $sleep_nano_seconds = filter_var($sleep_nano_seconds, FILTER_VALIDATE_INT);
         if ($sleep_nano_seconds === false) {
-            throw LoopSettingsException::create(LoopSettingsException::SLEEP_NS_IS_NOT_INTEGER);
+            throw TraceLoopInspectorSettingsException::create(
+                TraceLoopInspectorSettingsException::SLEEP_NS_IS_NOT_INTEGER
+            );
         }
 
         $max_retries = $input->getOption('max-retries');
@@ -61,7 +62,9 @@ public static function fromConsoleInput(InputInterface $input): self
         }
         $max_retries = filter_var($max_retries, FILTER_VALIDATE_INT);
         if ($max_retries === false) {
-            throw LoopSettingsException::create(LoopSettingsException::MAX_RETRY_IS_NOT_INTEGER);
+            throw TraceLoopInspectorSettingsException::create(
+                TraceLoopInspectorSettingsException::MAX_RETRY_IS_NOT_INTEGER
+            );
         }
 
         return new self($sleep_nano_seconds, self::CANCEL_KEY_DEFAULT, $max_retries);
diff --git a/src/Inspector/TraceLoopProvider.php b/src/Inspector/TraceLoopProvider.php
new file mode 100644
index 00000000..b575080e
--- /dev/null
+++ b/src/Inspector/TraceLoopProvider.php
@@ -0,0 +1,43 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector;
+
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PhpProfiler\Lib\Loop\Loop;
+use PhpProfiler\Lib\Loop\LoopBuilder;
+use PhpProfiler\Lib\Loop\LoopMiddleware\CallableMiddleware;
+use PhpProfiler\Lib\Loop\LoopMiddleware\KeyboardCancelMiddleware;
+use PhpProfiler\Lib\Loop\LoopMiddleware\NanoSleepMiddleware;
+use PhpProfiler\Lib\Loop\LoopMiddleware\RetryOnExceptionMiddleware;
+use PhpProfiler\Lib\Process\MemoryReader\MemoryReaderException;
+
+final class TraceLoopProvider
+{
+    private LoopBuilder $loop_builder;
+
+    public function __construct(LoopBuilder $loop_builder)
+    {
+        $this->loop_builder = $loop_builder;
+    }
+
+    public function getMainLoop(callable $main, TraceLoopSettings $settings): Loop
+    {
+        return $this->loop_builder
+            ->addProcess(RetryOnExceptionMiddleware::class, [$settings->max_retries, [MemoryReaderException::class]])
+            ->addProcess(KeyboardCancelMiddleware::class, [$settings->cancel_key])
+            ->addProcess(NanoSleepMiddleware::class, [$settings->sleep_nano_seconds])
+            ->addProcess(CallableMiddleware::class, [$main])
+            ->build();
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoop.php b/src/Lib/Loop/AsyncLoop.php
new file mode 100644
index 00000000..c477f0ce
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoop.php
@@ -0,0 +1,35 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Loop;
+
+final class AsyncLoop
+{
+    private AsyncLoopMiddlewareInterface $process;
+
+    public function __construct(AsyncLoopMiddlewareInterface $process)
+    {
+        $this->process = $process;
+    }
+
+    public function invoke(): \Generator
+    {
+        while (1) {
+            $result = $this->process->invoke();
+            if (!$result->valid()) {
+                break;
+            }
+            yield from $result;
+        }
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoopBuilder.php b/src/Lib/Loop/AsyncLoopBuilder.php
new file mode 100644
index 00000000..3cf4ea8a
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoopBuilder.php
@@ -0,0 +1,56 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace PhpProfiler\Lib\Loop;
+
+use LogicException;
+
+final class AsyncLoopBuilder
+{
+    /** @var array<int, class-string<AsyncLoopMiddlewareInterface>> */
+    private array $process_stack = [];
+    /** @var array<int, array> */
+    private array $parameter_stack = [];
+
+    /**
+     * @param class-string<AsyncLoopMiddlewareInterface> $process
+     * @param array $parameters
+     * @return self
+     */
+    public function addProcess(string $process, array $parameters): self
+    {
+        if (!is_a($process, AsyncLoopMiddlewareInterface::class, true)) {
+            throw new LogicException('1st argument must be a name of a class implements LoopMiddlewareInterface');
+        }
+        $self = clone $this;
+        $self->process_stack[] = $process;
+        $self->parameter_stack[] = $parameters;
+        return $self;
+    }
+
+    public function build(): AsyncLoop
+    {
+        $process = null;
+        $stack_num = count($this->process_stack);
+        for ($i = $stack_num - 1; $i >= 0; $i--) {
+            $parameters = $this->parameter_stack[$i];
+            if (!is_null($process)) {
+                $parameters[] = $process;
+            }
+            $loop_class_name = $this->process_stack[$i];
+            $process = new $loop_class_name(...$parameters);
+        }
+        if (is_null($process)) {
+            throw new LogicException('no LoopProcess specified');
+        }
+        return new AsyncLoop($process);
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoopMiddleware/CallableMiddlewareAsync.php b/src/Lib/Loop/AsyncLoopMiddleware/CallableMiddlewareAsync.php
new file mode 100644
index 00000000..55854fc8
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoopMiddleware/CallableMiddlewareAsync.php
@@ -0,0 +1,32 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Loop\AsyncLoopMiddleware;
+
+use PhpProfiler\Lib\Loop\AsyncLoopMiddlewareInterface;
+
+final class CallableMiddlewareAsync implements AsyncLoopMiddlewareInterface
+{
+    private $callable;
+
+    public function __construct(callable $callable)
+    {
+        $this->callable = $callable;
+    }
+
+    public function invoke(): \Generator
+    {
+        /** @var bool */
+        yield from ($this->callable)();
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoopMiddleware/NanoSleepMiddlewareAsync.php b/src/Lib/Loop/AsyncLoopMiddleware/NanoSleepMiddlewareAsync.php
new file mode 100644
index 00000000..990c75c3
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoopMiddleware/NanoSleepMiddlewareAsync.php
@@ -0,0 +1,34 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Loop\AsyncLoopMiddleware;
+
+use PhpProfiler\Lib\Loop\AsyncLoopMiddlewareInterface;
+
+final class NanoSleepMiddlewareAsync implements AsyncLoopMiddlewareInterface
+{
+    private int $sleep_nano_seconds;
+    private AsyncLoopMiddlewareInterface $chain;
+
+    public function __construct(int $sleep_nano_seconds, AsyncLoopMiddlewareInterface $chain)
+    {
+        $this->sleep_nano_seconds = $sleep_nano_seconds;
+        $this->chain = $chain;
+    }
+
+    public function invoke(): \Generator
+    {
+        time_nanosleep(0, $this->sleep_nano_seconds);
+        yield from $this->chain->invoke();
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoopMiddleware/RetryOnExceptionMiddlewareAsync.php b/src/Lib/Loop/AsyncLoopMiddleware/RetryOnExceptionMiddlewareAsync.php
new file mode 100644
index 00000000..ac2da8f2
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoopMiddleware/RetryOnExceptionMiddlewareAsync.php
@@ -0,0 +1,55 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Loop\AsyncLoopMiddleware;
+
+use Exception;
+use PhpProfiler\Lib\Loop\AsyncLoopMiddlewareInterface;
+
+final class RetryOnExceptionMiddlewareAsync implements AsyncLoopMiddlewareInterface
+{
+    private AsyncLoopMiddlewareInterface $chain;
+    /** @var array<int, class-string<Exception>> */
+    private array $exception_names;
+    private int $max_retry;
+    private int $current_retry_count = 0;
+
+    /**
+     * RetryOnExceptionLoop constructor.
+     * @param int $max_retry
+     * @param array<int, class-string<Exception>> $exception_names
+     * @param AsyncLoopMiddlewareInterface $chain
+     */
+    public function __construct(int $max_retry, array $exception_names, AsyncLoopMiddlewareInterface $chain)
+    {
+        $this->max_retry = $max_retry;
+        $this->exception_names = $exception_names;
+        $this->chain = $chain;
+    }
+
+    public function invoke(): \Generator
+    {
+        while ($this->current_retry_count <= $this->max_retry or $this->max_retry === -1) {
+            try {
+                yield from $this->chain->invoke();
+            } catch (Exception $e) {
+                if (in_array(get_class($e), $this->exception_names, true)) {
+                    $this->current_retry_count++;
+                    continue;
+                }
+                throw $e;
+            }
+            $this->current_retry_count = 0;
+        }
+    }
+}
diff --git a/src/Lib/Loop/AsyncLoopMiddlewareInterface.php b/src/Lib/Loop/AsyncLoopMiddlewareInterface.php
new file mode 100644
index 00000000..56bf3dc3
--- /dev/null
+++ b/src/Lib/Loop/AsyncLoopMiddlewareInterface.php
@@ -0,0 +1,19 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Loop;
+
+interface AsyncLoopMiddlewareInterface
+{
+    public function invoke(): \Generator;
+}
diff --git a/src/Lib/Loop/Loop.php b/src/Lib/Loop/Loop.php
index 8c342e11..0450f849 100644
--- a/src/Lib/Loop/Loop.php
+++ b/src/Lib/Loop/Loop.php
@@ -15,9 +15,9 @@
 
 final class Loop
 {
-    private LoopProcessInterface $process;
+    private LoopMiddlewareInterface $process;
 
-    public function __construct(LoopProcessInterface $process)
+    public function __construct(LoopMiddlewareInterface $process)
     {
         $this->process = $process;
     }
diff --git a/src/Lib/Loop/LoopBuilder.php b/src/Lib/Loop/LoopBuilder.php
index 98905837..1bc5e17c 100644
--- a/src/Lib/Loop/LoopBuilder.php
+++ b/src/Lib/Loop/LoopBuilder.php
@@ -17,20 +17,20 @@
 
 final class LoopBuilder
 {
-    /** @var array<int, class-string<LoopProcessInterface>> */
+    /** @var array<int, class-string<LoopMiddlewareInterface>> */
     private array $process_stack = [];
     /** @var array<int, array> */
     private array $parameter_stack = [];
 
     /**
-     * @param class-string<LoopProcessInterface> $process
+     * @param class-string<LoopMiddlewareInterface> $process
      * @param array $parameters
      * @return self
      */
     public function addProcess(string $process, array $parameters): self
     {
-        if (!is_a($process, LoopProcessInterface::class, true)) {
-            throw new LogicException('1st argument must be a name of a class implements LoopProcessInterface');
+        if (!is_a($process, LoopMiddlewareInterface::class, true)) {
+            throw new LogicException('1st argument must be a name of a class implements LoopMiddlewareInterface');
         }
         $self = clone $this;
         $self->process_stack[] = $process;
diff --git a/src/Lib/Loop/LoopProcess/CallableLoop.php b/src/Lib/Loop/LoopMiddleware/CallableMiddleware.php
similarity index 75%
rename from src/Lib/Loop/LoopProcess/CallableLoop.php
rename to src/Lib/Loop/LoopMiddleware/CallableMiddleware.php
index 406aa438..939a5241 100644
--- a/src/Lib/Loop/LoopProcess/CallableLoop.php
+++ b/src/Lib/Loop/LoopMiddleware/CallableMiddleware.php
@@ -11,11 +11,11 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
-use PhpProfiler\Lib\Loop\LoopProcessInterface;
+use PhpProfiler\Lib\Loop\LoopMiddlewareInterface;
 
-final class CallableLoop implements LoopProcessInterface
+final class CallableMiddleware implements LoopMiddlewareInterface
 {
     private $callable;
 
diff --git a/src/Lib/Loop/LoopProcess/KeyboardCancelLoop.php b/src/Lib/Loop/LoopMiddleware/KeyboardCancelMiddleware.php
similarity index 72%
rename from src/Lib/Loop/LoopProcess/KeyboardCancelLoop.php
rename to src/Lib/Loop/LoopMiddleware/KeyboardCancelMiddleware.php
index 98386abd..6fce8108 100644
--- a/src/Lib/Loop/LoopProcess/KeyboardCancelLoop.php
+++ b/src/Lib/Loop/LoopMiddleware/KeyboardCancelMiddleware.php
@@ -11,18 +11,18 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
-use PhpProfiler\Lib\Loop\LoopProcessInterface;
+use PhpProfiler\Lib\Loop\LoopMiddlewareInterface;
 
-final class KeyboardCancelLoop implements LoopProcessInterface
+final class KeyboardCancelMiddleware implements LoopMiddlewareInterface
 {
-    private LoopProcessInterface $chain;
+    private LoopMiddlewareInterface $chain;
     private string $cancel_key;
     /** @var resource */
     private $keyboard_input;
 
-    public function __construct(string $cancel_key, LoopProcessInterface $chain)
+    public function __construct(string $cancel_key, LoopMiddlewareInterface $chain)
     {
         $this->chain = $chain;
         exec('stty -icanon -echo');
diff --git a/src/Lib/Loop/LoopProcess/NanoSleepLoop.php b/src/Lib/Loop/LoopMiddleware/NanoSleepMiddleware.php
similarity index 66%
rename from src/Lib/Loop/LoopProcess/NanoSleepLoop.php
rename to src/Lib/Loop/LoopMiddleware/NanoSleepMiddleware.php
index 7cd95442..8b711433 100644
--- a/src/Lib/Loop/LoopProcess/NanoSleepLoop.php
+++ b/src/Lib/Loop/LoopMiddleware/NanoSleepMiddleware.php
@@ -11,16 +11,16 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
-use PhpProfiler\Lib\Loop\LoopProcessInterface;
+use PhpProfiler\Lib\Loop\LoopMiddlewareInterface;
 
-final class NanoSleepLoop implements LoopProcessInterface
+final class NanoSleepMiddleware implements LoopMiddlewareInterface
 {
     private int $sleep_nano_seconds;
-    private LoopProcessInterface $chain;
+    private LoopMiddlewareInterface $chain;
 
-    public function __construct(int $sleep_nano_seconds, LoopProcessInterface $chain)
+    public function __construct(int $sleep_nano_seconds, LoopMiddlewareInterface $chain)
     {
         $this->sleep_nano_seconds = $sleep_nano_seconds;
         $this->chain = $chain;
@@ -28,10 +28,10 @@ public function __construct(int $sleep_nano_seconds, LoopProcessInterface $chain
 
     public function invoke(): bool
     {
+        time_nanosleep(0, $this->sleep_nano_seconds);
         if (!$this->chain->invoke()) {
             return false;
         }
-        time_nanosleep(0, $this->sleep_nano_seconds);
         return true;
     }
 }
diff --git a/src/Lib/Loop/LoopProcess/RetryOnExceptionLoop.php b/src/Lib/Loop/LoopMiddleware/RetryOnExceptionMiddleware.php
similarity index 81%
rename from src/Lib/Loop/LoopProcess/RetryOnExceptionLoop.php
rename to src/Lib/Loop/LoopMiddleware/RetryOnExceptionMiddleware.php
index a03040e4..2e7316d6 100644
--- a/src/Lib/Loop/LoopProcess/RetryOnExceptionLoop.php
+++ b/src/Lib/Loop/LoopMiddleware/RetryOnExceptionMiddleware.php
@@ -11,14 +11,14 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
 use Exception;
-use PhpProfiler\Lib\Loop\LoopProcessInterface;
+use PhpProfiler\Lib\Loop\LoopMiddlewareInterface;
 
-final class RetryOnExceptionLoop implements LoopProcessInterface
+final class RetryOnExceptionMiddleware implements LoopMiddlewareInterface
 {
-    private LoopProcessInterface $chain;
+    private LoopMiddlewareInterface $chain;
     /** @var array<int, class-string<Exception>> */
     private array $exception_names;
     private int $max_retry;
@@ -28,9 +28,9 @@ final class RetryOnExceptionLoop implements LoopProcessInterface
      * RetryOnExceptionLoop constructor.
      * @param int $max_retry
      * @param array<int, class-string<Exception>> $exception_names
-     * @param LoopProcessInterface $chain
+     * @param LoopMiddlewareInterface $chain
      */
-    public function __construct(int $max_retry, array $exception_names, LoopProcessInterface $chain)
+    public function __construct(int $max_retry, array $exception_names, LoopMiddlewareInterface $chain)
     {
         $this->max_retry = $max_retry;
         $this->exception_names = $exception_names;
diff --git a/src/Lib/Loop/LoopProcessInterface.php b/src/Lib/Loop/LoopMiddlewareInterface.php
similarity index 90%
rename from src/Lib/Loop/LoopProcessInterface.php
rename to src/Lib/Loop/LoopMiddlewareInterface.php
index f28b2c27..9620d82c 100644
--- a/src/Lib/Loop/LoopProcessInterface.php
+++ b/src/Lib/Loop/LoopMiddlewareInterface.php
@@ -13,7 +13,7 @@
 
 namespace PhpProfiler\Lib\Loop;
 
-interface LoopProcessInterface
+interface LoopMiddlewareInterface
 {
     public function invoke(): bool;
 }
diff --git a/src/Lib/PhpProcessReader/PhpGlobalsFinder.php b/src/Lib/PhpProcessReader/PhpGlobalsFinder.php
index e5b681ef..f4743573 100644
--- a/src/Lib/PhpProcessReader/PhpGlobalsFinder.php
+++ b/src/Lib/PhpProcessReader/PhpGlobalsFinder.php
@@ -13,7 +13,8 @@
 
 namespace PhpProfiler\Lib\PhpProcessReader;
 
-use PhpProfiler\Command\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
 use PhpProfiler\Lib\ByteStream\IntegerByteSequence\IntegerByteSequenceReader;
 use PhpProfiler\Lib\ByteStream\CDataByteReader;
 use PhpProfiler\Lib\Elf\Parser\ElfParserException;
@@ -57,16 +58,21 @@ public function __construct(
 
     /**
      * @param TargetProcessSettings $target_process_settings
+     * @param TargetPhpSettings $target_php_settings
      * @return int
-     * @throws ElfParserException
      * @throws MemoryReaderException
      * @throws ProcessSymbolReaderException
      * @throws TlsFinderException
      */
-    public function findTsrmLsCache(TargetProcessSettings $target_process_settings): ?int
-    {
+    public function findTsrmLsCache(
+        TargetProcessSettings $target_process_settings,
+        TargetPhpSettings $target_php_settings
+    ): ?int {
         if (!isset($this->tsrm_ls_cache) and !$this->tsrm_ls_cache_not_found) {
-            $tsrm_lm_cache_cdata = $this->getSymbolReader($target_process_settings)->read('_tsrm_ls_cache');
+            $tsrm_lm_cache_cdata = $this->getSymbolReader(
+                $target_process_settings,
+                $target_php_settings
+            )->read('_tsrm_ls_cache');
             if (isset($tsrm_lm_cache_cdata)) {
                 $this->tsrm_ls_cache = $this->integer_reader->read64(
                     new CDataByteReader($tsrm_lm_cache_cdata),
@@ -81,21 +87,23 @@ public function findTsrmLsCache(TargetProcessSettings $target_process_settings):
 
     /**
      * @param TargetProcessSettings $target_process_settings
+     * @param TargetPhpSettings $target_php_settings
      * @return ProcessSymbolReaderInterface
-     * @throws ElfParserException
      * @throws MemoryReaderException
      * @throws ProcessSymbolReaderException
      * @throws TlsFinderException
      */
-    public function getSymbolReader(TargetProcessSettings $target_process_settings): ProcessSymbolReaderInterface
-    {
+    public function getSymbolReader(
+        TargetProcessSettings $target_process_settings,
+        TargetPhpSettings $target_php_settings
+    ): ProcessSymbolReaderInterface {
         if (!isset($this->php_symbol_reader_cache[$target_process_settings->pid])) {
             $symbol_reader = $this->php_symbol_reader_creator->create(
                 $target_process_settings->pid,
-                $target_process_settings->php_regex,
-                $target_process_settings->libpthread_regex,
-                $target_process_settings->php_path,
-                $target_process_settings->libpthread_path
+                $target_php_settings->php_regex,
+                $target_php_settings->libpthread_regex,
+                $target_php_settings->php_path,
+                $target_php_settings->libpthread_path
             );
             $this->php_symbol_reader_cache[$target_process_settings->pid] = $symbol_reader;
         }
@@ -104,22 +112,25 @@ public function getSymbolReader(TargetProcessSettings $target_process_settings):
 
     /**
      * @param TargetProcessSettings $target_process_settings
+     * @param TargetPhpSettings $target_php_settings
      * @return int
      * @throws ElfParserException
      * @throws MemoryReaderException
      * @throws ProcessSymbolReaderException
      * @throws TlsFinderException
      */
-    public function findExecutorGlobals(TargetProcessSettings $target_process_settings): int
-    {
-        $tsrm_ls_cache = $this->findTsrmLsCache($target_process_settings);
+    public function findExecutorGlobals(
+        TargetProcessSettings $target_process_settings,
+        TargetPhpSettings $target_php_settings
+    ): int {
+        $tsrm_ls_cache = $this->findTsrmLsCache($target_process_settings, $target_php_settings);
         if (isset($tsrm_ls_cache)) {
-            switch ($target_process_settings->php_version) {
+            switch ($target_php_settings->php_version) {
                 case ZendTypeReader::V70:
                 case ZendTypeReader::V71:
                 case ZendTypeReader::V72:
                 case ZendTypeReader::V73:
-                    $executor_globals_id_cdata = $this->getSymbolReader($target_process_settings)
+                    $executor_globals_id_cdata = $this->getSymbolReader($target_process_settings, $target_php_settings)
                         ->read('executor_globals_id');
                     if (is_null($executor_globals_id_cdata)) {
                         throw new RuntimeException('executor_globals_id not found');
@@ -150,8 +161,10 @@ public function findExecutorGlobals(TargetProcessSettings $target_process_settin
                     )->toInt();
 
                 case ZendTypeReader::V74:
-                    $executor_globals_offset_cdata = $this->getSymbolReader($target_process_settings)
-                        ->read('executor_globals_offset');
+                    $executor_globals_offset_cdata = $this->getSymbolReader(
+                        $target_process_settings,
+                        $target_php_settings
+                    )->read('executor_globals_offset');
                     if (is_null($executor_globals_offset_cdata)) {
                         throw new RuntimeException('executor_globals_offset not found');
                     }
@@ -164,7 +177,7 @@ public function findExecutorGlobals(TargetProcessSettings $target_process_settin
                     throw new \LogicException('this should never happen');
             }
         }
-        $executor_globals_address = $this->getSymbolReader($target_process_settings)
+        $executor_globals_address = $this->getSymbolReader($target_process_settings, $target_php_settings)
             ->resolveAddress('executor_globals');
         if (is_null($executor_globals_address)) {
             throw new RuntimeException('executor globals not found');
diff --git a/src/Lib/Process/ProcFileSystem/CommandLineEnumerator.php b/src/Lib/Process/ProcFileSystem/CommandLineEnumerator.php
new file mode 100644
index 00000000..adb89294
--- /dev/null
+++ b/src/Lib/Process/ProcFileSystem/CommandLineEnumerator.php
@@ -0,0 +1,46 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Process\ProcFileSystem;
+
+use IteratorAggregate;
+use PhpProfiler\Lib\File\FileReaderInterface;
+
+final class CommandLineEnumerator implements IteratorAggregate
+{
+    private FileReaderInterface $reader;
+
+    public function __construct(FileReaderInterface $reader)
+    {
+        $this->reader = $reader;
+    }
+
+    /**
+     * @return \Generator<int, string>
+     */
+    public function getIterator()
+    {
+        /**
+         * @var string $full_path
+         * @var \SplFileInfo $item
+         */
+        foreach (new \GlobIterator('/proc/*/cmdline') as $full_path => $item) {
+            $command_line = $this->reader->readAll($full_path);
+            if ($command_line === '') {
+                continue;
+            }
+
+            yield (int)basename($item->getPath()) => $command_line;
+        }
+    }
+}
diff --git a/src/Lib/Process/Search/ProcessSearcher.php b/src/Lib/Process/Search/ProcessSearcher.php
new file mode 100644
index 00000000..0af3ff48
--- /dev/null
+++ b/src/Lib/Process/Search/ProcessSearcher.php
@@ -0,0 +1,48 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Process\Search;
+
+use PhpProfiler\Lib\File\CatFileReader;
+use PhpProfiler\Lib\File\FileReaderInterface;
+use PhpProfiler\Lib\Process\ProcFileSystem\CommandLineEnumerator;
+
+final class ProcessSearcher
+{
+    /**
+     * @var FileReaderInterface
+     */
+    private FileReaderInterface $file_reader;
+
+    public function __construct(FileReaderInterface $file_reader)
+    {
+        $this->file_reader = $file_reader;
+    }
+
+    /**
+     * @param string $regex
+     * @return int[]
+     */
+    public function searchByRegex(string $regex): array
+    {
+        $result = [];
+
+        foreach (new CommandLineEnumerator($this->file_reader) as $pid => $command_line) {
+            if (preg_match($regex, $command_line)) {
+                $result[] = $pid;
+            }
+        }
+
+        return $result;
+    }
+}
diff --git a/tests/Inspector/Daemon/Reader/Context/PhpReaderContextTest.php b/tests/Inspector/Daemon/Reader/Context/PhpReaderContextTest.php
new file mode 100644
index 00000000..1d55c78a
--- /dev/null
+++ b/tests/Inspector/Daemon/Reader/Context/PhpReaderContextTest.php
@@ -0,0 +1,85 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Inspector\Daemon\Reader\Context;
+
+use Amp\Parallel\Context\Context;
+use Amp\Promise;
+use Mockery;
+use PhpProfiler\Inspector\Daemon\Reader\Message\SetSettingsMessage;
+use PhpProfiler\Inspector\Settings\GetTraceSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TraceLoopSettings;
+use PHPUnit\Framework\TestCase;
+
+final class PhpReaderContextTest extends TestCase
+{
+    public function testStart(): void
+    {
+        $context = Mockery::mock(Context::class);
+        $context->expects()->start()->andReturn(Mockery::mock(Promise::class));
+        $php_reader_context = new PhpReaderContext($context);
+        $this->assertInstanceOf(Promise::class, $php_reader_context->start());
+    }
+
+    public function testIsRunning(): void
+    {
+        $context = Mockery::mock(Context::class);
+        $context->expects()->isRunning()->andReturn(true);
+        $context->expects()->isRunning()->andReturn(false);
+        $php_reader_context = new PhpReaderContext($context);
+        $this->assertSame(true, $php_reader_context->isRunning());
+        $this->assertSame(false, $php_reader_context->isRunning());
+    }
+
+    public function testSendSettings(): void
+    {
+        $target_php_settings = new TargetPhpSettings();
+        $trace_loop_settings = new TraceLoopSettings(1, 'q', 1);
+        $get_trace_settings = new GetTraceSettings(1);
+
+        $expected = new SetSettingsMessage(
+            $target_php_settings,
+            $trace_loop_settings,
+            $get_trace_settings
+        );
+
+        $context = Mockery::mock(Context::class);
+        $context->shouldReceive('send')
+            ->once()
+            ->with(
+                Mockery::on(function (SetSettingsMessage $actual) use ($expected) {
+                    $this->assertEquals($actual, $expected);
+                    return true;
+                })
+            )
+            ->andReturn(Mockery::mock(Promise::class));
+        $php_reader_context = new PhpReaderContext($context);
+        $this->assertInstanceOf(
+            Promise::class,
+            $php_reader_context->sendSettings(
+                $target_php_settings,
+                $trace_loop_settings,
+                $get_trace_settings
+            )
+        );
+    }
+
+    public function testReceiveTrace(): void
+    {
+        $context = Mockery::mock(Context::class);
+        $context->expects()->receive()->andReturn(Mockery::mock(Promise::class));
+        $php_reader_context = new PhpReaderContext($context);
+        $this->assertInstanceOf(Promise::class, $php_reader_context->receiveTrace());
+    }
+}
diff --git a/tests/Lib/Loop/LoopBuilderTest.php b/tests/Lib/Loop/LoopBuilderTest.php
index ca8b26a1..254cdc4a 100644
--- a/tests/Lib/Loop/LoopBuilderTest.php
+++ b/tests/Lib/Loop/LoopBuilderTest.php
@@ -15,8 +15,8 @@
 
 use Exception;
 use LogicException;
-use PhpProfiler\Lib\Loop\LoopProcess\CallableLoop;
-use PhpProfiler\Lib\Loop\LoopProcess\RetryOnExceptionLoop;
+use PhpProfiler\Lib\Loop\LoopMiddleware\CallableMiddleware;
+use PhpProfiler\Lib\Loop\LoopMiddleware\RetryOnExceptionMiddleware;
 use PHPUnit\Framework\TestCase;
 
 class LoopBuilderTest extends TestCase
@@ -26,9 +26,9 @@ public function testBuild(): void
         $call_counter = 0;
         $execute_counter = 0;
         $builder = new LoopBuilder();
-        $loop = $builder->addProcess(RetryOnExceptionLoop::class, [1, [Exception::class]])
+        $loop = $builder->addProcess(RetryOnExceptionMiddleware::class, [1, [Exception::class]])
             ->addProcess(
-                CallableLoop::class,
+                CallableMiddleware::class,
                 [
                     function () use (&$call_counter, &$execute_counter): bool {
                         if (++$call_counter === 1) {
diff --git a/tests/Lib/Loop/LoopProcess/CallableLoopTest.php b/tests/Lib/Loop/LoopMiddleware/CallableLoopTest.php
similarity index 82%
rename from tests/Lib/Loop/LoopProcess/CallableLoopTest.php
rename to tests/Lib/Loop/LoopMiddleware/CallableLoopTest.php
index 2b747fa8..6fac89bc 100644
--- a/tests/Lib/Loop/LoopProcess/CallableLoopTest.php
+++ b/tests/Lib/Loop/LoopMiddleware/CallableLoopTest.php
@@ -11,7 +11,7 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
 use PHPUnit\Framework\TestCase;
 
@@ -20,7 +20,7 @@ class CallableLoopTest extends TestCase
     public function testInvoke(): void
     {
         $side_effect = false;
-        $loop = new CallableLoop(function () use (&$side_effect) {
+        $loop = new CallableMiddleware(function () use (&$side_effect) {
             $side_effect = true;
             return true;
         });
diff --git a/tests/Lib/Loop/LoopProcess/KeyboardCancelLoopTest.php b/tests/Lib/Loop/LoopMiddleware/KeyboardCancelLoopTest.php
similarity index 81%
rename from tests/Lib/Loop/LoopProcess/KeyboardCancelLoopTest.php
rename to tests/Lib/Loop/LoopMiddleware/KeyboardCancelLoopTest.php
index 19f68132..c715eaa7 100644
--- a/tests/Lib/Loop/LoopProcess/KeyboardCancelLoopTest.php
+++ b/tests/Lib/Loop/LoopMiddleware/KeyboardCancelLoopTest.php
@@ -11,7 +11,7 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
 use PHPUnit\Framework\TestCase;
 use ReflectionClass;
@@ -24,12 +24,12 @@ class KeyboardCancelLoopTest extends TestCase
      */
     public function testReturnFalseIfCancelKeyPressed(): void
     {
-        $reflection = new ReflectionClass(KeyboardCancelLoop::class);
+        $reflection = new ReflectionClass(KeyboardCancelMiddleware::class);
         $keyboard_cancel_loop = $reflection->newInstanceWithoutConstructor();
         $keyboard_input_stream = fopen('php://memory', 'rw');
         (function () use ($keyboard_input_stream) {
-            /** @var KeyboardCancelLoop $this */
-            $this->chain = new CallableLoop(fn () => true);
+            /** @var KeyboardCancelMiddleware $this */
+            $this->chain = new CallableMiddleware(fn () => true);
             $this->cancel_key = 'q';
             $this->keyboard_input = $keyboard_input_stream;
         })->bindTo($keyboard_cancel_loop, $keyboard_cancel_loop)();
diff --git a/tests/Lib/Loop/LoopProcess/NanoSleepLoopTest.php b/tests/Lib/Loop/LoopMiddleware/NanoSleepLoopTest.php
similarity index 58%
rename from tests/Lib/Loop/LoopProcess/NanoSleepLoopTest.php
rename to tests/Lib/Loop/LoopMiddleware/NanoSleepLoopTest.php
index 44e2acb9..7c2be7d8 100644
--- a/tests/Lib/Loop/LoopProcess/NanoSleepLoopTest.php
+++ b/tests/Lib/Loop/LoopMiddleware/NanoSleepLoopTest.php
@@ -11,27 +11,30 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
+use LogicException;
 use PHPUnit\Framework\TestCase;
 
 class NanoSleepLoopTest extends TestCase
 {
-    public function testReturnFalseWithoutSleepIfChainFailed(): void
+    public function testReturnFalseIfChainFailed(): void
     {
         $time = time();
-        $nano_sleep_loop = new NanoSleepLoop(
-            1000 * 1000 * 1000,
-            new CallableLoop(fn () => false)
+        $nano_sleep_loop = new NanoSleepMiddleware(
+            0,
+            new CallableMiddleware(fn () => false)
         );
         $this->assertSame(false, $nano_sleep_loop->invoke());
     }
 
-    public function testSleepIfChainSucceed(): void
+    public function testSleepBeforeChainInvoked(): void
     {
-        $nano_sleep_loop = new NanoSleepLoop(
+        $nano_sleep_loop = new NanoSleepMiddleware(
             1000 * 1000 * 1000,
-            new CallableLoop(fn () => true)
+            new CallableMiddleware(function () {
+                throw new LogicException('should not be thrown');
+            })
         );
         $this->expectWarning();
         $this->expectWarningMessageMatches('/nanoseconds was not in the range 0 to 999 999 999/');
@@ -40,9 +43,9 @@ public function testSleepIfChainSucceed(): void
 
     public function testReturnTrueIfChainSucceed(): void
     {
-        $nano_sleep_loop = new NanoSleepLoop(
+        $nano_sleep_loop = new NanoSleepMiddleware(
             0,
-            new CallableLoop(fn () => true)
+            new CallableMiddleware(fn () => true)
         );
         $this->assertSame(true, $nano_sleep_loop->invoke());
     }
diff --git a/tests/Lib/Loop/LoopProcess/RetryOnExceptionLoopTest.php b/tests/Lib/Loop/LoopMiddleware/RetryOnExceptionLoopTest.php
similarity index 77%
rename from tests/Lib/Loop/LoopProcess/RetryOnExceptionLoopTest.php
rename to tests/Lib/Loop/LoopMiddleware/RetryOnExceptionLoopTest.php
index b696c964..e3821f55 100644
--- a/tests/Lib/Loop/LoopProcess/RetryOnExceptionLoopTest.php
+++ b/tests/Lib/Loop/LoopMiddleware/RetryOnExceptionLoopTest.php
@@ -11,7 +11,7 @@
 
 declare(strict_types=1);
 
-namespace PhpProfiler\Lib\Loop\LoopProcess;
+namespace PhpProfiler\Lib\Loop\LoopMiddleware;
 
 use Exception;
 use LogicException;
@@ -22,19 +22,19 @@ class RetryOnExceptionLoopTest extends TestCase
 {
     public function testReturnIfChainReturn(): void
     {
-        $loop = new RetryOnExceptionLoop(0, [Exception::class], new CallableLoop(fn () => true));
+        $loop = new RetryOnExceptionMiddleware(0, [Exception::class], new CallableMiddleware(fn () => true));
         $this->assertSame(true, $loop->invoke());
-        $loop = new RetryOnExceptionLoop(0, [Exception::class], new CallableLoop(fn () => false));
+        $loop = new RetryOnExceptionMiddleware(0, [Exception::class], new CallableMiddleware(fn () => false));
         $this->assertSame(false, $loop->invoke());
     }
 
     public function testRetryIfChainThrows(): void
     {
         $counter = 0;
-        $loop = new RetryOnExceptionLoop(
+        $loop = new RetryOnExceptionMiddleware(
             1,
             [Exception::class],
-            new CallableLoop(
+            new CallableMiddleware(
                 function () use (&$counter) {
                     if ($counter++ === 0) {
                         throw new Exception();
@@ -50,10 +50,10 @@ function () use (&$counter) {
     public function testReturnFalseIfRetryCountExceedsMax(): void
     {
         $counter = 0;
-        $loop = new RetryOnExceptionLoop(
+        $loop = new RetryOnExceptionMiddleware(
             0,
             [Exception::class],
-            new CallableLoop(
+            new CallableMiddleware(
                 function () use (&$counter) {
                     if ($counter++ === 0) {
                         throw new Exception();
@@ -68,10 +68,10 @@ function () use (&$counter) {
 
     public function testRethrowUnspecifiedException(): void
     {
-        $loop = new RetryOnExceptionLoop(
+        $loop = new RetryOnExceptionMiddleware(
             0,
             [RuntimeException::class],
-            new CallableLoop(
+            new CallableMiddleware(
                 function () {
                     throw new LogicException();
                 }
diff --git a/tests/Lib/Loop/LoopTest.php b/tests/Lib/Loop/LoopTest.php
index aac08205..afff33a5 100644
--- a/tests/Lib/Loop/LoopTest.php
+++ b/tests/Lib/Loop/LoopTest.php
@@ -13,7 +13,7 @@
 
 namespace PhpProfiler\Lib\Loop;
 
-use PhpProfiler\Lib\Loop\LoopProcess\CallableLoop;
+use PhpProfiler\Lib\Loop\LoopMiddleware\CallableMiddleware;
 use PHPUnit\Framework\TestCase;
 
 class LoopTest extends TestCase
@@ -22,7 +22,7 @@ public function testInvoke()
     {
         $counter = 0;
         $loop = new Loop(
-            new CallableLoop(
+            new CallableMiddleware(
                 function () use (&$counter) {
                     $counter++;
                     if ($counter >= 3) {
diff --git a/tests/Lib/PhpProcessReader/PhpMemoryReader/ExecutorGlobalsReaderTest.php b/tests/Lib/PhpProcessReader/PhpMemoryReader/ExecutorGlobalsReaderTest.php
index 0724aa84..b26e4a29 100644
--- a/tests/Lib/PhpProcessReader/PhpMemoryReader/ExecutorGlobalsReaderTest.php
+++ b/tests/Lib/PhpProcessReader/PhpMemoryReader/ExecutorGlobalsReaderTest.php
@@ -13,7 +13,8 @@
 
 namespace PhpProfiler\Lib\PhpProcessReader\PhpMemoryReader;
 
-use PhpProfiler\Command\Inspector\Settings\TargetProcessSettings;
+use PhpProfiler\Inspector\Settings\TargetPhpSettings;
+use PhpProfiler\Inspector\Settings\TargetProcessSettings;
 use PhpProfiler\Lib\ByteStream\IntegerByteSequence\LittleEndianReader;
 use PhpProfiler\Lib\Elf\Parser\Elf64Parser;
 use PhpProfiler\Lib\Elf\Process\ProcessModuleSymbolReaderCreator;
@@ -89,7 +90,8 @@ public function testReadCurrentFunctionName()
 
         /** @var int $child_status['pid'] */
         $executor_globals_address = $php_globals_finder->findExecutorGlobals(
-            new TargetProcessSettings($child_status['pid'])
+            new TargetProcessSettings($child_status['pid']),
+            new TargetPhpSettings()
         );
         $name = $executor_globals_reader->readCurrentFunctionName(
             $child_status['pid'],
diff --git a/tests/Lib/Process/MemoryMap/ProcessMemoryMapReaderTest.php b/tests/Lib/Process/MemoryMap/ProcessMemoryMapReaderTest.php
index 7a1ac748..9d6ce8a4 100644
--- a/tests/Lib/Process/MemoryMap/ProcessMemoryMapReaderTest.php
+++ b/tests/Lib/Process/MemoryMap/ProcessMemoryMapReaderTest.php
@@ -25,7 +25,7 @@ public function testRead()
     {
         $result = (new ProcessMemoryMapReader())->read(getmypid());
         $first_line = strtok($result, "\n");
-        $this->assertRegExp(
+        $this->assertMatchesRegularExpression(
             '/[0-9a-f]{12,16}-[0-9a-f]{12,16} [r\-][w\-][x\-][p\-] [0-9a-f]{8} [0-9][0-9]:[0-9][0-9] [0-9]+ +[^ ]+/',
             $first_line
         );
diff --git a/tests/Lib/Process/ProcFileSystem/CommandLineEnumeratorTest.php b/tests/Lib/Process/ProcFileSystem/CommandLineEnumeratorTest.php
new file mode 100644
index 00000000..0c2332e6
--- /dev/null
+++ b/tests/Lib/Process/ProcFileSystem/CommandLineEnumeratorTest.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Process\ProcFileSystem;
+
+use PhpProfiler\Lib\File\CatFileReader;
+use PHPUnit\Framework\TestCase;
+
+class CommandLineEnumeratorTest extends TestCase
+{
+    /** @var resource|null */
+    private $child = null;
+
+    public function tearDown(): void
+    {
+        if (!is_null($this->child)) {
+            $child_status = proc_get_status($this->child);
+            if (is_array($child_status)) {
+                if ($child_status['running']) {
+                    posix_kill($child_status['pid'], SIGKILL);
+                }
+            }
+        }
+    }
+
+    public function testGetIterator()
+    {
+        $this->child = proc_open(
+            [
+                PHP_BINARY,
+                '-r',
+                'fputs(STDOUT, "a\n");fgets(STDIN);'
+            ],
+            [
+                ['pipe', 'r'],
+                ['pipe', 'w'],
+                ['pipe', 'w']
+            ],
+            $pipes
+        );
+        fgets($pipes[1]);
+        $child_status = proc_get_status($this->child);
+        $child_pid = $child_status['pid'];
+
+        $target = null;
+        foreach (new CommandLineEnumerator(new CatFileReader()) as $pid => $command_line) {
+            if ($pid === $child_pid) {
+                $target = $command_line;
+                break;
+            }
+        }
+        $this->assertNotNull($target);
+        $this->assertStringContainsString(PHP_BINARY, $target);
+        $this->assertStringContainsString('fputs(STDOUT, "a\n");fgets(STDIN);', $target);
+    }
+}
diff --git a/tests/Lib/Process/Search/ProcessSearcherTest.php b/tests/Lib/Process/Search/ProcessSearcherTest.php
new file mode 100644
index 00000000..bd89df6d
--- /dev/null
+++ b/tests/Lib/Process/Search/ProcessSearcherTest.php
@@ -0,0 +1,61 @@
+<?php
+
+/**
+ * This file is part of the sj-i/php-profiler package.
+ *
+ * (c) sji <sji@sj-i.dev>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace PhpProfiler\Lib\Process\Search;
+
+use PhpProfiler\Lib\File\CatFileReader;
+use PHPUnit\Framework\TestCase;
+
+class ProcessSearcherTest extends TestCase
+{
+    /** @var resource|null */
+    private $child = null;
+
+    public function tearDown(): void
+    {
+        if (!is_null($this->child)) {
+            $child_status = proc_get_status($this->child);
+            if (is_array($child_status)) {
+                if ($child_status['running']) {
+                    posix_kill($child_status['pid'], SIGKILL);
+                }
+            }
+        }
+    }
+
+    public function testSearch()
+    {
+        $this->child = proc_open(
+            [
+                PHP_BINARY,
+                '-r',
+                'fputs(STDOUT, "test_ProcessSearcherTest`\n");fgets(STDIN);'
+            ],
+            [
+                ['pipe', 'r'],
+                ['pipe', 'w'],
+                ['pipe', 'w']
+            ],
+            $pipes
+        );
+        fgets($pipes[1]);
+        $child_status = proc_get_status($this->child);
+        $child_pid = $child_status['pid'];
+
+        $searcher = new ProcessSearcher(new CatFileReader());
+        $this->assertSame(
+            [$child_pid],
+            $searcher->searchByRegex('/test_ProcessSearcherTest/')
+        );
+    }
+}