Add php 8.4 compatibility

.ci/generate_package_lifecycle_test_matrix.sh

@@ -106,8 +106,13 @@ function generateAgentUpgradeRows () {
     local testingType=agent-upgrade
     local appHostKindShortName=all
     local testsGroup=smoke
+    for phpVersion in 7.4 ; do
+        for linuxPackageType in rpm ; do
+            echo "${phpVersion},${linuxPackageType},${testingType},${appHostKindShortName},${testsGroup}"
+        done
+    done
     for phpVersion in 7.4 "$(latestSupportedPhpVersion)" ; do
-        for linuxPackageType in deb rpm ; do
+        for linuxPackageType in deb ; do
             echo "${phpVersion},${linuxPackageType},${testingType},${appHostKindShortName},${testsGroup}"
         done
     done

.ci/packer_cache.sh

@@ -15,6 +15,7 @@ php:8.0-fpm
 php:8.1-fpm
 php:8.2-fpm
 php:8.3-fpm
+php:8.4-fpm
 ruby:2.7.1-alpine3.12
 ubuntu:20.04
 "
@@ -26,7 +27,7 @@ if [ -x "$(command -v docker)" ]; then
 
   # Make sure list of PHP versions supported by the Elastic APM PHP Agent is in sync.
   # See the comment in .ci/shared.sh
-  for version in 7.2 7.3 7.4 8.0 8.1 8.2 8.3
+  for version in 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
   do
     PHP_VERSION=${version} make -f .ci/Makefile prepare || true
     DOCKERFILE=Dockerfile.alpine PHP_VERSION=${version} make -f .ci/Makefile prepare || true

.ci/shared.sh

@@ -16,7 +16,7 @@ set -e
 # *) docker-compose.yml in packaging/test
 
 #
-export ELASTIC_APM_PHP_TESTS_SUPPORTED_PHP_VERSIONS=(7.2 7.3 7.4 8.0 8.1 8.2 8.3)
+export ELASTIC_APM_PHP_TESTS_SUPPORTED_PHP_VERSIONS=(7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4)
 
 export ELASTIC_APM_PHP_TESTS_SUPPORTED_LINUX_NATIVE_PACKAGE_TYPES=(apk deb rpm)
 export ELASTIC_APM_PHP_TESTS_SUPPORTED_LINUX_PACKAGE_TYPES=("${ELASTIC_APM_PHP_TESTS_SUPPORTED_LINUX_NATIVE_PACKAGE_TYPES[@]}" tar)

.github/workflows/loop.yml

@@ -23,6 +23,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
         dockerfile:
           - "Dockerfile"
           - "Dockerfile.alpine"

.github/workflows/phpt.yml

@@ -28,6 +28,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
     steps:
     # - uses: actions/checkout@v4
     # - name: Fetch and extract latest release of apm-agent-php

.github/workflows/test.yml

@@ -58,6 +58,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
         data: ${{ fromJson(needs.setup-build-matrix.outputs.matrix-combinations).include }}
     env:
       PHP_VERSION: ${{ matrix.php-version }}
@@ -90,6 +91,7 @@ jobs:
           - "8.1"
           - "8.2"
           - "8.3"
+          - "8.4"
         dockerfile:
           - "Dockerfile"
           - "Dockerfile.alpine"

agent/native/CMakeLists.txt

@@ -43,7 +43,7 @@ include(elastic_conan_debugsymbols)
 
 # Install project dependencies
 
-set(_supported_php_versions 72 73 74 80 81 82 83)
+set(_supported_php_versions 72 73 74 80 81 82 83 84)
 
 function(get_php_api_from_release php_version ret_val)
     block(SCOPE_FOR VARIABLES)
@@ -54,6 +54,7 @@ function(get_php_api_from_release php_version ret_val)
         set(_php_release_81 20210902)
         set(_php_release_82 20220829)
         set(_php_release_83 20230831)
+        set(_php_release_84 20240924)
 
         set(${ret_val} ${_php_release_${php_version}})
         return(PROPAGATE ${ret_val})

agent/native/building/dependencies/php84/conandata.yml

@@ -0,0 +1,37 @@
+name: "php-headers-84"
+version: "1.0"
+php_source_version: 8.4.1
+
+sources:
+  7.2.34:
+    linux:
+      - url: "https://www.php.net/distributions/php-7.2.34.tar.gz"
+        contentsRoot: "php-7.2.34"
+  7.3.33:
+    linux:
+      - url: "https://www.php.net/distributions/php-7.3.33.tar.gz"
+        contentsRoot: "php-7.3.33"
+  7.4.33:
+    linux:
+      - url: "https://www.php.net/distributions/php-7.4.33.tar.gz"
+        contentsRoot: "php-7.4.33"
+  8.0.28:
+    linux:
+      - url: "https://www.php.net/distributions/php-8.0.28.tar.gz"
+        contentsRoot: "php-8.0.28"
+  8.1.18:
+    linux:
+      - url: "https://www.php.net/distributions/php-8.1.18.tar.gz"
+        contentsRoot: "php-8.1.18"
+  8.2.5:
+    linux:
+      - url: "https://www.php.net/distributions/php-8.2.5.tar.gz"
+        contentsRoot: "php-8.2.5"
+  8.3.2:
+    linux:
+      - url: "https://www.php.net/distributions/php-8.3.2.tar.gz"
+        contentsRoot: "php-8.3.2"
+  8.4.1:
+    linux:
+      - url: "https://www.php.net/distributions/php-8.4.1.tar.gz"
+        contentsRoot: "php-8.4.1"

agent/native/building/dependencies/php84/conanfile.py

@@ -0,0 +1,56 @@
+import os
+import shutil
+
+from conans import tools, ConanFile, AutoToolsBuildEnvironment
+
+class PhpHeadersForPHP81Conan(ConanFile):
+    description = "PHP headers package required to build Elastic APM agent without additional PHP dependencies"
+    license = "The PHP License, version 3.01"
+    homepage = "https://php.net/"
+    url = "https://php.net/"
+    author = "pawel.filipczak@elastic.co"
+
+    settings = "os", "compiler", "build_type", "arch"
+    platform = "linux"
+
+    def init(self):
+        self.name = self.conan_data["name"]
+        self.version = self.conan_data["version"] # version of the package
+        self.php_version = self.conan_data["php_source_version"] # version of the PHP to build
+        self.source_temp_dir = "php-src"
+
+    def requirements(self):
+        self.requires("libxml2/2.9.9")
+        self.requires("sqlite3/3.29.0")
+
+    def source(self):
+        for source in self.conan_data["sources"][self.php_version][self.platform]:
+
+            if "contentsRoot" in source:
+                # small hack - it can't contain custom fields, so we're removing it from source (got an unexpected keyword argument)
+                contentRoot = source["contentsRoot"]
+                del source["contentsRoot"]
+                tools.get(**source)
+                os.rename(contentRoot, self.source_temp_dir)
+            else:
+                self.output.error("Could not find 'contentsRoot' in conandata.yml")
+                raise Exception("Could not find 'contentsRoot' in conandata.yml")
+
+    def build(self):
+        with tools.chdir(os.path.join(self.source_folder, self.source_temp_dir)):
+            buildEnv = AutoToolsBuildEnvironment(self)
+            envVariables = buildEnv.vars
+            envVariables['ac_cv_php_xml2_config_path'] = os.path.join(self.deps_cpp_info["libxml2"].rootpath, "bin/xml2-config")
+            envVariables['LIBXML_LIBS'] = os.path.join(self.deps_cpp_info["libxml2"].rootpath, self.deps_cpp_info["libxml2"].libdirs[0])
+            envVariables['LIBXML_CFLAGS'] = "-I{}".format(os.path.join(self.deps_cpp_info["libxml2"].rootpath, self.deps_cpp_info["libxml2"].includedirs[0]))
+            envVariables['SQLITE_LIBS'] = os.path.join(self.deps_cpp_info["sqlite3"].rootpath, self.deps_cpp_info["sqlite3"].libdirs[0])
+            envVariables['SQLITE_CFLAGS'] = "-I{}".format(os.path.join(self.deps_cpp_info["sqlite3"].rootpath, self.deps_cpp_info["sqlite3"].includedirs[0]))
+            self.run("./buildconf --force")
+            buildEnv.configure(args=[""], vars=envVariables, build=False, host=False)
+
+    def package(self):
+        source = os.path.join(self.source_folder, self.source_temp_dir)
+        self.copy("*.h", src=source, dst='include', keep_path=True)
+
+    def package_id(self):
+        del self.info.settings.compiler.version

agent/native/ext/AST_debug.cpp

@@ -224,11 +224,16 @@ String zendAstKindToString( zend_ast_kind kind )
         ELASTIC_APM_GEN_ENUM_TO_STRING_SWITCH_CASE( ZEND_AST_TYPE_INTERSECTION );
         #endif
 
-
         #if PHP_VERSION_ID >= ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 3, 0 ) /* if PHP version from 8.3.0 */
         ELASTIC_APM_GEN_ENUM_TO_STRING_SWITCH_CASE( ZEND_AST_MODIFIER_LIST );
         #endif
 
+        #if PHP_VERSION_ID >= ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 4, 0 ) /* if PHP version from 8.4.0 */
+        ELASTIC_APM_GEN_ENUM_TO_STRING_SWITCH_CASE( ZEND_AST_PARENT_PROPERTY_HOOK_CALL );
+        ELASTIC_APM_GEN_ENUM_TO_STRING_SWITCH_CASE( ZEND_AST_PROPERTY_HOOK );
+        ELASTIC_APM_GEN_ENUM_TO_STRING_SWITCH_CASE( ZEND_AST_PROPERTY_HOOK_SHORT_BODY );
+        #endif
+
         default:
             return NULL;
     }

agent/native/ext/AST_instrumentation.cpp

@@ -181,25 +181,47 @@ bool isZendAstListKind( zend_ast_kind kind )
 }
 
 /**
- * zend_ast_create and zend_ast_create_ex allowed up to 4 child* parameters for version before PHP v8
- * and the limit was increased to 5 in PHP v8
+ * Max number of children for AST nodes is
+ *      4 for PHP before 8.0
+ *      5 for PHP from 8.0 but before 8.4
+ *      6 for PHP from 8.4
  *
  * @see ZEND_AST_SPEC_CALL_EX
+ *
+ * When adding support for a new PHP version:
+ *      - Make sure g_astNodeMaxChildCount is correct
+ *      - If g_astNodeMaxChildCount changed then update createAstEx()
+ *      - Make sure zendAstKindToString() in AST_debug.cpp includes all the enum cases from enum _zend_ast_kind in <php-src>/Zend/zend_ast.h
+ *      - Increment minor part of PHP version in static_assert below
  */
-static size_t g_maxCreateAstChildCount =
+static_assert(
+    PHP_VERSION_ID < ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 5, 0 ),
+    "Make sure g_astNodeMaxChildCount is correct. See max number of children in enum _zend_ast_kind in <php-src>/Zend/zend_ast.h"
+);
+static constexpr size_t g_astNodeMaxChildCount =
+    #if PHP_VERSION_ID < ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 0, 0 )
+    4 // PHP before 8.0
+    #elif PHP_VERSION_ID < ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 4, 0 )
+    5 // PHP from 8.0 but before 8.4
+    #else
+    6 // PHP from 8.4
+    #endif
+;
+static constexpr size_t g_zendKindWithLargestChildNodesCount =
     #if PHP_VERSION_ID < ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 0, 0 )
-    4
+    ZEND_AST_FOR // PHP before 8.0
     #else
-    5
+    ZEND_AST_PARAM // PHP from 8.0
     #endif
 ;
+static_assert(g_zendKindWithLargestChildNodesCount == (g_astNodeMaxChildCount << ZEND_AST_NUM_CHILDREN_SHIFT));
 
 zend_ast* createAstEx( zend_ast_kind kind, zend_ast_attr attr, ZendAstPtrArrayView children )
 {
     char txtOutStreamBuf[ELASTIC_APM_TEXT_OUTPUT_STREAM_ON_STACK_BUFFER_SIZE];
     TextOutputStream txtOutStream = ELASTIC_APM_TEXT_OUTPUT_STREAM_FROM_STATIC_BUFFER( txtOutStreamBuf );
 
-    ELASTIC_APM_ASSERT_LE_UINT64( children.count, g_maxCreateAstChildCount );
+    ELASTIC_APM_ASSERT_LE_UINT64( children.count, g_astNodeMaxChildCount );
     ELASTIC_APM_ASSERT( ! isZendAstListKind( kind ), "kind: %s", streamZendAstKind( kind, &txtOutStream ) );
 
     switch( children.count )
@@ -218,6 +240,10 @@ zend_ast* createAstEx( zend_ast_kind kind, zend_ast_attr attr, ZendAstPtrArrayVi
         case 5:
             return zend_ast_create_ex( kind, attr, children.values[ 0 ], children.values[ 1 ], children.values[ 2 ], children.values[ 3 ], children.values[ 4 ] );
         #endif
+        #if PHP_VERSION_ID >= ELASTIC_APM_BUILD_PHP_VERSION_ID( 8, 4, 0 )
+        case 6:
+            return zend_ast_create_ex( kind, attr, children.values[ 0 ], children.values[ 1 ], children.values[ 2 ], children.values[ 3 ], children.values[ 4 ], children.values[ 5 ] );
+        #endif
         default: // silence compiler warning
             return nullptr;
     }
@@ -227,9 +253,9 @@ ResultCode createAstExCheckChildrenCount( zend_ast_kind kind, zend_ast_attr attr
 {
     ResultCode resultCode;
 
-    if ( children.count > g_maxCreateAstChildCount )
+    if ( children.count > g_astNodeMaxChildCount )
     {
-        ELASTIC_APM_LOG_ERROR( "Number of children is larger than max; children.count: %u, g_maxCreateAstChildCount: %u", (unsigned)children.count, (unsigned)g_maxCreateAstChildCount );
+        ELASTIC_APM_LOG_ERROR( "Number of children is larger than max; children.count: %u, g_astNodeMaxChildCount: %u", (unsigned)children.count, (unsigned)g_astNodeMaxChildCount );
         ELASTIC_APM_SET_RESULT_CODE_AND_GOTO_FAILURE_EX( resultFailure );
     }
 

agent/native/ext/tests_util/tests_util.php

@@ -21,7 +21,7 @@
 
 declare(strict_types=1);
 
-error_reporting(E_ALL | E_STRICT);
+error_reporting(E_ALL);
 
 function elasticApmOnAssertFailure(string $condDesc, string $expr, $actual, $expected)
 {

agent/native/loader/code/phpdetection.cpp

@@ -56,9 +56,10 @@ bool isThreadSafe() {
 
 std::tuple<std::string_view, int, bool> getZendModuleApiVersion(std::string_view zendVersion) {
     using namespace std::string_view_literals;
-    constexpr size_t knownVersionsCount = 16;
+    constexpr size_t knownVersionsCount = 17;
 
     constexpr std::array<std::tuple<std::string_view, int, bool>, knownVersionsCount> knownPhpVersions {{
+        {"4.4"sv, 20240924, true},    // PHP 8.4
         {"4.3"sv, 20230831, true},    // PHP 8.3
         {"4.2"sv, 20220829, true},    // PHP 8.2
         {"4.1"sv, 20210902, true},    // PHP 8.1
@@ -91,4 +92,4 @@ std::tuple<std::string_view, int, bool> getZendModuleApiVersion(std::string_view
 
 
 
-}
+}

agent/php/ElasticApm/Impl/AutoInstrument/CurlHandleWrappedTrait.php

@@ -100,6 +100,7 @@ public function setOpt(int $option, $value): bool
 
     public function asInt(): int
     {
+        /** @phpstan-ignore-next-line */
         return is_resource($this->curlHandle) ? intval($this->curlHandle) : spl_object_id($this->curlHandle);
     }
 

agent/php/ElasticApm/Impl/AutoInstrument/TransactionForExtensionRequest.php

@@ -572,6 +572,7 @@ private function discoverStartTime(float $requestInitStartTime): float
             return $requestInitStartTime;
         }
 
+        /** @phpstan-ignore-next-line */
         $serverRequestTimeInSeconds = floatval($serverRequestTimeAsString);
         $serverRequestTimeInMicroseconds = $serverRequestTimeInSeconds * TimeUtil::NUMBER_OF_MICROSECONDS_IN_SECOND;
         if ($requestInitStartTime < $serverRequestTimeInMicroseconds) {

agent/php/ElasticApm/Impl/Config/IniRawSnapshotSource.php

@@ -79,6 +79,7 @@ private static function iniValueToString($iniValue): string
             return $iniValue ? 'true' : 'false';
         }
 
+        /** @phpstan-ignore-next-line */
         return strval($iniValue);
     }
 }

agent/php/ElasticApm/Impl/InferredSpansManager.php

@@ -205,11 +205,14 @@ private function onNewCurrentTransactionHasBegun(Transaction $transaction): void
         ($assertProxy = Assert::ifEnabled())
         && $assertProxy->that($this->onCurrentSpanChangedCallback === null)
         && $assertProxy->withContext('$this->onCurrentSpanChangedCallback === null', ['this' => $this]);
-        $this->currentTransaction->onCurrentSpanChanged->add(
-            $this->onCurrentSpanChangedCallback = function (?Span $span): void {
-                $this->onCurrentSpanChanged($span);
-            }
-        );
+
+        if ($this->currentTransaction !== null) {
+            $this->currentTransaction->onCurrentSpanChanged->add(
+                $this->onCurrentSpanChangedCallback = function (?Span $span): void {
+                    $this->onCurrentSpanChanged($span);
+                }
+            );
+        }
 
         $this->builder = new InferredSpansBuilder($this->tracer);
         $this->state = self::STATE_RUNNING;

agent/php/ElasticApm/Impl/Log/LoggableToJsonEncodable.php

@@ -108,6 +108,7 @@ public static function convert($value, int $depth)
             return self::convertObject($value, $depth);
         }
 
+        /** @phpstan-ignore-next-line */
         return [LogConsts::TYPE_KEY => DbgUtil::getType($value), LogConsts::VALUE_AS_STRING_KEY => strval($value)];
     }
 

agent/php/ElasticApm/Impl/Util/ArrayUtil.php

@@ -33,17 +33,18 @@ final class ArrayUtil
     use StaticClassTrait;
 
     /**
-     * @param string        $key
-     * @param array<mixed>  $array
-     * @param mixed         $valueDst
+     * @template TKey of array-key
+     * @template TValue
      *
-     * @return bool
+     * @param TKey                 $key
+     * @param array<TKey, TValue>  $array
+     * @param TValue              &$valueDst
      *
-     * @template        T
-     * @phpstan-param   T[] $array
-     * @phpstan-param   T   $valueDst
+     * @param-out TValue           $valueDst
+     *
+     * @return bool
      */
-    public static function getValueIfKeyExists(string $key, array $array, &$valueDst): bool
+    public static function getValueIfKeyExists($key, array $array, /* out */ &$valueDst): bool
     {
         if (!array_key_exists($key, $array)) {
             return false;
@@ -54,7 +55,7 @@ public static function getValueIfKeyExists(string $key, array $array, &$valueDst
     }
 
     /**
-     * @template TKey of string|int
+     * @template TKey of array-key
      * @template TValue
      *
      * @param TKey                $key