Attachment 338865 Details for Bug 183442 – Patch

[patch] Patch

bug-183442-20180426115314.patch (text/plain), 103.61 KB, created by GSkachkov on 2018-04-26 01:53:17 PDT

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Creator: GSkachkov

Created: 2018-04-26 01:53:17 PDT

Size: 103.61 KB

patch

obsolete

>Subversion Revision: 231042
>diff --git a/Source/JavaScriptCore/ChangeLog b/Source/JavaScriptCore/ChangeLog
>index 65a52c14faa9d34e530c7530fe8b09f3f093239e..862a80b7a4f73b10938be8ac272d611f01022ac9 100644
>--- a/Source/JavaScriptCore/ChangeLog
>+++ b/Source/JavaScriptCore/ChangeLog
>@@ -1,3 +1,77 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WebAssembly stream API. Current patch only add functions
>+        WebAssembly.compileStreaming and WebAssembly.instantiateStreaming but,
>+        does not add streaming way of the implementation. So in current version it
>+        only wait for load whole module, than start to parse. 
>+ 
>+        * JavaScriptCore.xcodeproj/project.pbxproj:
>+        * jsc.cpp:
>+        * runtime/JSGlobalObject.cpp:
>+        * runtime/JSGlobalObject.h:
>+        * wasm/js/WebAssemblyPrototype.cpp:
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleValidateAsyncInternal):
>+        (JSC::webAssemblyCompileFunc):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleValidateAsync):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleInstantinateAsync):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleInstantinateAsyncInternal):
>+        (JSC::webAssemblyCompileStreamingFunc):
>+        (JSC::webAssemblyInstantiateStreamingFunc):
>+        * wasm/js/WebAssemblyPrototype.h:
>+
>+        * DerivedSources.make:
>+        * JavaScriptCore.xcodeproj/project.pbxproj:
>+        * builtins/BuiltinNames.h:
>+        * builtins/WebAssemblyPrototype.js: Copied from Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h.
>+        (compileStreaming):
>+        (instantiateStreaming):
>+        * jsc.cpp:
>+        * runtime/JSGlobalObject.cpp:
>+        (JSC::JSGlobalObject::init):
>+        * runtime/JSGlobalObject.h:
>+        * runtime/Options.h:
>+        * wasm/js/WebAssemblyPrototype.cpp:
>+        (JSC::webAssemblyModuleValidateAsyncInternal):
>+        (JSC::webAssemblyCompileFunc):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleValidateAsync):
>+        (JSC::webAssemblyModuleInstantinateAsyncInternal):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleInstantinateAsync):
>+        (JSC::webAssemblyCompileStreamingInternal):
>+        (JSC::webAssemblyInstantiateStreamingInternal):
>+        (JSC::WebAssemblyPrototype::create):
>+        (JSC::WebAssemblyPrototype::finishCreation):
>+        * wasm/js/WebAssemblyPrototype.h:
>+
>+        * CMakeLists.txt:
>+        * Configurations/FeatureDefines.xcconfig:
>+        * DerivedSources.make:
>+        * JavaScriptCore.xcodeproj/project.pbxproj:
>+        * builtins/BuiltinNames.h:
>+        * builtins/WebAssemblyPrototype.js: Copied from Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h.
>+        (compileStreaming):
>+        (instantiateStreaming):
>+        * jsc.cpp:
>+        * runtime/JSGlobalObject.cpp:
>+        (JSC::JSGlobalObject::init):
>+        * runtime/JSGlobalObject.h:
>+        * runtime/Options.h:
>+        * wasm/js/WebAssemblyPrototype.cpp:
>+        (JSC::webAssemblyModuleValidateAsyncInternal):
>+        (JSC::webAssemblyCompileFunc):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleValidateAsync):
>+        (JSC::webAssemblyModuleInstantinateAsyncInternal):
>+        (JSC::WebAssemblyPrototype::webAssemblyModuleInstantinateAsync):
>+        (JSC::webAssemblyCompileStreamingInternal):
>+        (JSC::webAssemblyInstantiateStreamingInternal):
>+        (JSC::WebAssemblyPrototype::create):
>+        (JSC::WebAssemblyPrototype::finishCreation):
>+        * wasm/js/WebAssemblyPrototype.h:
>+
> 2018-04-25  Robin Morisset  <rmorisset@apple.com>
> 
>         In FTLLowerDFGToB3.cpp::compileCreateRest, always use a contiguous array as the indexing type when under isWatchingHavingABadTimeWatchpoint
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index b60aae27e92f030c34b1f0fd312ab72ac15172b1..7d8e44672be806e8eeba556172281859b029f0e6 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,24 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WebAssembly streaming API to WebCore.
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+        * bindings/js/JSDOMWindowBase.cpp:
>+        (WebCore::tryAllocate):
>+        (WebCore::isResponseCorrect):
>+        (WebCore::JSDOMWindowBase::compileStreaming):
>+        (WebCore::JSDOMWindowBase::instantiateStreaming):
>+        (WebCore::JSDOMWindowBase::handleStreamingAction):
>+        (WebCore::JSDOMWindowBase::handleResponseOnStreamingAction):
>+        * bindings/js/JSDOMWindowBase.h:
>+        * bindings/js/JSRemoteDOMWindowBase.cpp:
>+        * bindings/js/JSWorkerGlobalScopeBase.cpp:
>+
> 2018-04-25  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         [WPE] Build and link against latest WPEBackend and WPEBackend-fdo
>diff --git a/Source/WebCore/PAL/ChangeLog b/Source/WebCore/PAL/ChangeLog
>index aa61cb53eab1d9393b45c79e8830a51102cc48d3..89eda3a1c636f3d73023ce78e17220cfea19e715 100644
>--- a/Source/WebCore/PAL/ChangeLog
>+++ b/Source/WebCore/PAL/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WEBASSEMBLY_STREAMING_API feature flag
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+
> 2018-04-24  Jer Noble  <jer.noble@apple.com>
> 
>         Don't add system framework paths to FRAMEWORK_SEARCH_PATHS
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 7d22fdb5216ed102a37b6f0223e44074af6d8b9e..de3f1fcdb3fb9acf66cef59f086e7dc3973bc0a0 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WEBASSEMBLY_STREAMING_API feature flag
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+
> 2018-04-25  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         [WPE] Build and link against latest WPEBackend and WPEBackend-fdo
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index 07d48cd31952d9d65ee10aad21649c57b66d5bf3..e8ec946c1bbf7b825c0fdfe8005d8d4a9ab024ee 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WEBASSEMBLY_STREAMINNG_API feature flag
>+
>+        * Configurations/FeatureDefines.xcconfig:
>+
> 2018-04-25  Jiewen Tan  <jiewen_tan@apple.com>
> 
>         Remove access to keychain from the WebContent process
>diff --git a/Source/JavaScriptCore/CMakeLists.txt b/Source/JavaScriptCore/CMakeLists.txt
>index ead6ddcfd64041885b91def61fe009cfe3615017..ed2e4e0ef65bcd732c45c997b40b7100f228cde8 100644
>--- a/Source/JavaScriptCore/CMakeLists.txt
>+++ b/Source/JavaScriptCore/CMakeLists.txt
>@@ -927,6 +927,8 @@ set(JavaScriptCore_PRIVATE_FRAMEWORK_HEADERS
>     wasm/WasmTierUpCount.h
> 
>     wasm/js/JSWebAssemblyModule.h
>+    wasm/js/WebAssemblyPrototype.h
>+
> 
>     yarr/RegularExpression.h
>     yarr/Yarr.h
>@@ -1119,6 +1121,7 @@ set(JavaScriptCore_BUILTINS_SOURCES
>     ${JAVASCRIPTCORE_DIR}/builtins/StringPrototype.js
>     ${JAVASCRIPTCORE_DIR}/builtins/TypedArrayConstructor.js
>     ${JAVASCRIPTCORE_DIR}/builtins/TypedArrayPrototype.js
>+    ${JAVASCRIPTCORE_DIR}/builtins/WebAssemblyPrototype.js
> )
> 
> add_custom_command(
>diff --git a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/JavaScriptCore/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/JavaScriptCore/DerivedSources.make b/Source/JavaScriptCore/DerivedSources.make
>index 8295690c7c5b7429da6f15cf1e76b32b359b5221..358f18f15a7595081fb7a7ed9f13f37564ec7bf0 100644
>--- a/Source/JavaScriptCore/DerivedSources.make
>+++ b/Source/JavaScriptCore/DerivedSources.make
>@@ -124,6 +124,7 @@ JavaScriptCore_BUILTINS_SOURCES = \
>     $(JavaScriptCore)/builtins/StringPrototype.js \
>     $(JavaScriptCore)/builtins/TypedArrayConstructor.js \
>     $(JavaScriptCore)/builtins/TypedArrayPrototype.js \
>+    $(JavaScriptCore)/builtins/WebAssemblyPrototype.js \
> #
> 
> # The combined output file depends on the contents of builtins and generator scripts, so
>diff --git a/Source/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj b/Source/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj
>index 383a06b7af5de5f8831d247ba64d1e8d85859aa0..235a37467f267f471109f9fd459ecb6f159284eb 100644
>--- a/Source/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj
>+++ b/Source/JavaScriptCore/JavaScriptCore.xcodeproj/project.pbxproj
>@@ -1500,7 +1500,7 @@
> 		AD2FCC1F1DB59CB200B3E736 /* WebAssemblyRuntimeErrorPrototype.lut.h in Headers */ = {isa = PBXBuildFile; fileRef = AD2FCC131DB59C5900B3E736 /* WebAssemblyRuntimeErrorPrototype.lut.h */; };
> 		AD2FCC201DB59CB200B3E736 /* WebAssemblyTableConstructor.lut.h in Headers */ = {isa = PBXBuildFile; fileRef = AD2FCC141DB59C5900B3E736 /* WebAssemblyTableConstructor.lut.h */; };
> 		AD2FCC211DB59CB200B3E736 /* WebAssemblyTablePrototype.lut.h in Headers */ = {isa = PBXBuildFile; fileRef = AD2FCC151DB59C5900B3E736 /* WebAssemblyTablePrototype.lut.h */; };
>-		AD2FCC2D1DB838FD00B3E736 /* WebAssemblyPrototype.h in Headers */ = {isa = PBXBuildFile; fileRef = AD2FCC271DB838C400B3E736 /* WebAssemblyPrototype.h */; };
>+		AD2FCC2D1DB838FD00B3E736 /* WebAssemblyPrototype.h in Headers */ = {isa = PBXBuildFile; fileRef = AD2FCC271DB838C400B3E736 /* WebAssemblyPrototype.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		AD412B341E7B2E9E008AF157 /* WasmContext.h in Headers */ = {isa = PBXBuildFile; fileRef = AD412B321E7B2E8A008AF157 /* WasmContext.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		AD4252511E5D0E14009D2A97 /* FullCodeOrigin.h in Headers */ = {isa = PBXBuildFile; fileRef = AD4252501E5D0DEB009D2A97 /* FullCodeOrigin.h */; };
> 		AD4937C41DDBE6140077C807 /* AbstractModuleRecord.h in Headers */ = {isa = PBXBuildFile; fileRef = AD4937C21DDBE60A0077C807 /* AbstractModuleRecord.h */; settings = {ATTRIBUTES = (Private, ); }; };
>@@ -3793,6 +3793,7 @@
> 		8B3BF5E31E3D365A0076A87A /* AsyncGeneratorPrototype.lut.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AsyncGeneratorPrototype.lut.h; sourceTree = "<group>"; };
> 		8B6016F31F3E3CC000F9DE6A /* AsyncFromSyncIteratorPrototype.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AsyncFromSyncIteratorPrototype.cpp; sourceTree = "<group>"; };
> 		8B6016F41F3E3CC000F9DE6A /* AsyncFromSyncIteratorPrototype.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AsyncFromSyncIteratorPrototype.h; sourceTree = "<group>"; };
>+		8B89612C20868584005DD39B /* WebAssemblyPrototype.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = WebAssemblyPrototype.js; sourceTree = "<group>"; };
> 		8B9F6D551D5912FA001C739F /* IterationKind.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = IterationKind.h; sourceTree = "<group>"; };
> 		8BC064821E180B4A00B2B8CA /* AsyncGeneratorPrototype.js */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.javascript; path = AsyncGeneratorPrototype.js; sourceTree = "<group>"; };
> 		8BC064831E1A4FD000B2B8CA /* AsyncGeneratorFunctionConstructor.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = AsyncGeneratorFunctionConstructor.cpp; sourceTree = "<group>"; };
>@@ -6658,6 +6659,7 @@
> 				865A30F0135007E100CDB49E /* JSCJSValueInlines.h */,
> 				FE2B0B681FD0D2970075DA5F /* JSCPoison.cpp */,
> 				FE2B0B701FD8C4630075DA5F /* JSCPoison.h */,
>+				FE7497E5209001B00003565B /* JSCPtrTag.h */,
> 				72AAF7CB1D0D318B005E60BE /* JSCustomGetterSetterFunction.cpp */,
> 				72AAF7CC1D0D318B005E60BE /* JSCustomGetterSetterFunction.h */,
> 				0F2B66BD17B6B5AB00A7AE3F /* JSDataView.cpp */,
>@@ -6743,7 +6745,6 @@
> 				2A05ABD41961DF2400341750 /* JSPropertyNameEnumerator.h */,
> 				862553CE16136AA5009F17D0 /* JSProxy.cpp */,
> 				862553CF16136AA5009F17D0 /* JSProxy.h */,
>-				FE7497E5209001B00003565B /* JSCPtrTag.h */,
> 				534638721E70D01500F12AC1 /* JSRunLoopTimer.cpp */,
> 				534638701E70CF3D00F12AC1 /* JSRunLoopTimer.h */,
> 				14874AE115EBDE4A002E3587 /* JSScope.cpp */,
>@@ -7942,6 +7943,7 @@
> 				A1E0451B1C25B4B100BB663C /* StringPrototype.js */,
> 				534C457A1BC703DC007476A7 /* TypedArrayConstructor.js */,
> 				53917E831B791CB8000EBD33 /* TypedArrayPrototype.js */,
>+				8B89612C20868584005DD39B /* WebAssemblyPrototype.js */,
> 			);
> 			path = builtins;
> 			sourceTree = "<group>";
>@@ -8914,6 +8916,7 @@
> 				0FB467801FDDA6F1003FCB09 /* IsoCellSet.h in Headers */,
> 				0FB467811FDDA6F7003FCB09 /* IsoCellSetInlines.h in Headers */,
> 				0FDCE12D1FAFB4E5006F3901 /* IsoSubspace.h in Headers */,
>+				0F5E0FE72086AD480097F0DE /* IsoSubspacePerVM.h in Headers */,
> 				8B9F6D561D5912FA001C739F /* IterationKind.h in Headers */,
> 				FE4D55B81AE716CA0052E459 /* IterationStatus.h in Headers */,
> 				70113D4C1A8DB093003848C4 /* IteratorOperations.h in Headers */,
>@@ -8987,6 +8990,7 @@
> 				A5D2E665195E174000A518E7 /* JSContextRefInternal.h in Headers */,
> 				148CD1D8108CF902008163C6 /* JSContextRefPrivate.h in Headers */,
> 				FE2B0B731FD9EF700075DA5F /* JSCPoison.h in Headers */,
>+				FE7497E6209001B10003565B /* JSCPtrTag.h in Headers */,
> 				A72028B81797601E0098028C /* JSCTestRunnerUtils.h in Headers */,
> 				72AAF7CE1D0D31B3005E60BE /* JSCustomGetterSetterFunction.h in Headers */,
> 				0F2B66EC17B6B5AB00A7AE3F /* JSDataView.h in Headers */,
>@@ -9061,7 +9065,6 @@
> 				7C008CDB187124BB00955C24 /* JSPromiseDeferred.h in Headers */,
> 				7C184E1F17BEE22E007CB63A /* JSPromisePrototype.h in Headers */,
> 				996B731F1BDA08EF00331B84 /* JSPromisePrototype.lut.h in Headers */,
>-				FE7497E6209001B10003565B /* JSCPtrTag.h in Headers */,
> 				2A05ABD61961DF2400341750 /* JSPropertyNameEnumerator.h in Headers */,
> 				862553D216136E1A009F17D0 /* JSProxy.h in Headers */,
> 				A552C3801ADDB8FE00139726 /* JSRemoteInspector.h in Headers */,
>@@ -9490,7 +9493,6 @@
> 				53F8D2001E8387D400D21116 /* WasmBBQPlanInlines.h in Headers */,
> 				AD4B1DFA1DF244E20071AE32 /* WasmBinding.h in Headers */,
> 				525C0DDA1E935847002184CD /* WasmCallee.h in Headers */,
>-				0F5E0FE72086AD480097F0DE /* IsoSubspacePerVM.h in Headers */,
> 				53FD04D41D7AB291003287D3 /* WasmCallingConvention.h in Headers */,
> 				526AC4B71E977C5D003500E1 /* WasmCodeBlock.h in Headers */,
> 				AD412B341E7B2E9E008AF157 /* WasmContext.h in Headers */,
>diff --git a/Source/JavaScriptCore/builtins/BuiltinNames.h b/Source/JavaScriptCore/builtins/BuiltinNames.h
>index 198fd1c85c383dd32eb609c125922c2c2e70829c..e522a1e1b8f29c532a9c608202c5c139b452d3ca 100644
>--- a/Source/JavaScriptCore/builtins/BuiltinNames.h
>+++ b/Source/JavaScriptCore/builtins/BuiltinNames.h
>@@ -189,6 +189,8 @@ namespace JSC {
>     macro(LinkError) \
>     macro(RuntimeError) \
>     macro(meta) \
>+    macro(webAssemblyCompileStreamingInternal) \
>+    macro(webAssemblyInstantiateStreamingInternal) \
> 
> namespace Symbols {
> #define DECLARE_BUILTIN_STATIC_SYMBOLS(name) extern SymbolImpl::StaticSymbolImpl name##Symbol;
>diff --git a/Source/JavaScriptCore/builtins/WebAssemblyPrototype.js b/Source/JavaScriptCore/builtins/WebAssemblyPrototype.js
>new file mode 100644
>index 0000000000000000000000000000000000000000..9cc5411a00404fd217d3228d0c8a920eb870887f
>--- /dev/null
>+++ b/Source/JavaScriptCore/builtins/WebAssemblyPrototype.js
>@@ -0,0 +1,33 @@
>+/*
>+ * Copyright (C) 2018 Oleksandr Skachkov <gskachkov@gmail.com>.
>+ *
>+ * Redistribution and use in source and binary forms, with or without
>+ * modification, are permitted provided that the following conditions
>+ * are met:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. Redistributions in binary form must reproduce the above copyright
>+ *    notice, this list of conditions and the following disclaimer in the
>+ *    documentation and/or other materials provided with the distribution.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
>+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
>+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
>+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
>+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
>+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
>+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
>+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
>+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
>+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
>+ */
>+
>+function compileStreaming(argument) {
>+    return @Promise.@resolve(argument).@then(@webAssemblyCompileStreamingInternal);
>+}
>+
>+function instantiateStreaming(argument) {
>+    return @Promise.@resolve(argument).@then(@webAssemblyInstantiateStreamingInternal);
>+}
>+
>diff --git a/Source/JavaScriptCore/jsc.cpp b/Source/JavaScriptCore/jsc.cpp
>index 4a73e87e96e0bffd8ce1a971928f385f67f2067e..3b1724848352f4248c94cc078667197d2f8523ad 100644
>--- a/Source/JavaScriptCore/jsc.cpp
>+++ b/Source/JavaScriptCore/jsc.cpp
>@@ -642,6 +642,8 @@ const GlobalObjectMethodTable GlobalObject::s_globalObjectMethodTable = {
>     nullptr, // moduleLoaderEvaluate
>     nullptr, // promiseRejectionTracker
>     nullptr, // defaultLanguage
>+    nullptr, // compileStreaming
>+    nullptr, // instantinateStreaming
> };
> 
> GlobalObject::GlobalObject(VM& vm, Structure* structure)
>diff --git a/Source/JavaScriptCore/runtime/JSGlobalObject.cpp b/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
>index d4674c019d864804f4c66685da9df965fd1ed9c7..1f826e303a3e8d2b124a5895516bf317633e08e1 100644
>--- a/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
>+++ b/Source/JavaScriptCore/runtime/JSGlobalObject.cpp
>@@ -169,6 +169,7 @@
> #include "WeakMapPrototype.h"
> #include "WeakSetConstructor.h"
> #include "WeakSetPrototype.h"
>+#include "WebAssemblyPrototype.h"
> #include "WebAssemblyToJSCallee.h"
> #include <wtf/RandomNumber.h>
> 
>@@ -286,6 +287,8 @@ const GlobalObjectMethodTable JSGlobalObject::s_globalObjectMethodTable = {
>     nullptr, // moduleLoaderEvaluate
>     nullptr, // promiseRejectionTracker
>     nullptr, // defaultLanguage
>+    nullptr, // compileStreaming
>+    nullptr, // instantiateStreaming
> };
> 
> /* Source for JSGlobalObject.lut.h
>@@ -938,6 +941,10 @@ putDirectWithoutTransition(vm, vm.propertyNames-> jsName, lowerName ## Construct
>         GlobalPropertyInfo(vm.propertyNames->builtinNames().setBucketHeadPrivateName(), privateFuncSetBucketHead, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
>         GlobalPropertyInfo(vm.propertyNames->builtinNames().setBucketNextPrivateName(), privateFuncSetBucketNext, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
>         GlobalPropertyInfo(vm.propertyNames->builtinNames().setBucketKeyPrivateName(), privateFuncSetBucketKey, PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
>+
>+        // WebAssembly Streaming API
>+        GlobalPropertyInfo(vm.propertyNames->builtinNames().webAssemblyCompileStreamingInternalPrivateName(), JSFunction::create(vm, this, 1, String(), webAssemblyCompileStreamingInternal), PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
>+        GlobalPropertyInfo(vm.propertyNames->builtinNames().webAssemblyInstantiateStreamingInternalPrivateName(), JSFunction::create(vm, this, 1, String(), webAssemblyInstantiateStreamingInternal), PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
> #if !ASSERT_DISABLED
>         GlobalPropertyInfo(vm.propertyNames->builtinNames().assertPrivateName(), JSFunction::create(vm, this, 1, String(), assertCall), PropertyAttribute::DontEnum | PropertyAttribute::DontDelete | PropertyAttribute::ReadOnly),
> #endif
>diff --git a/Source/JavaScriptCore/runtime/JSGlobalObject.h b/Source/JavaScriptCore/runtime/JSGlobalObject.h
>index 7ad0f74ba26d3689d294a8afdff48ade0540b4dd..36cf09cf33d388c7820bbd31775f4ee98c6d68ca 100644
>--- a/Source/JavaScriptCore/runtime/JSGlobalObject.h
>+++ b/Source/JavaScriptCore/runtime/JSGlobalObject.h
>@@ -32,6 +32,7 @@
> #include "JSCPoison.h"
> #include "JSClassRef.h"
> #include "JSGlobalLexicalEnvironment.h"
>+#include "JSPromiseDeferred.h"
> #include "JSSegmentedVariableObject.h"
> #include "JSWeakObjectMapRefInternal.h"
> #include "LazyProperty.h"
>@@ -217,6 +218,12 @@ struct GlobalObjectMethodTable {
> 
>     typedef String (*DefaultLanguageFunctionPtr)();
>     DefaultLanguageFunctionPtr defaultLanguage;
>+
>+    typedef void (*CompileStreamingPtr)(JSGlobalObject*, ExecState*, JSPromiseDeferred*, JSValue);
>+    CompileStreamingPtr compileStreaming;
>+
>+    typedef void (*InstantiateStreamingPtr)(JSGlobalObject*, ExecState*, JSPromiseDeferred*, JSValue, JSObject*);
>+    InstantiateStreamingPtr instantiateStreaming;
> };
> 
> class JSGlobalObject : public JSSegmentedVariableObject {
>diff --git a/Source/JavaScriptCore/runtime/Options.h b/Source/JavaScriptCore/runtime/Options.h
>index b3f4f2e0184d39420889183e4b31ae47a5cf7191..cbd3b2929d817f2424c1a8d4039ffc2e8fe66b50 100644
>--- a/Source/JavaScriptCore/runtime/Options.h
>+++ b/Source/JavaScriptCore/runtime/Options.h
>@@ -112,6 +112,12 @@ constexpr bool enableAsyncIteration = true;
> constexpr bool enableAsyncIteration = false;
> #endif
> 
>+#if ENABLE(WEBASSEMBLY_STREAMING_API)
>+constexpr bool enableWebAssemblyStreamingApi = true;
>+#else
>+constexpr bool enableWebAssemblyStreamingApi = false;
>+#endif
>+
> #define JSC_OPTIONS(v) \
>     v(bool, validateOptions, false, Normal, "crashes if mis-typed JSC options were passed to the VM") \
>     v(unsigned, dumpOptions, 0, Normal, "dumps JSC options (0 = None, 1 = Overridden only, 2 = All, 3 = Verbose)") \
>@@ -484,6 +490,7 @@ constexpr bool enableAsyncIteration = false;
>     v(bool, crashIfWebAssemblyCantFastMemory, false, Normal, "If true, we will crash if we can't obtain fast memory for wasm.") \
>     v(unsigned, maxNumWebAssemblyFastMemories, 4, Normal, nullptr) \
>     v(bool, useFastTLSForWasmContext, true, Normal, "If true, we will store context in fast TLS. If false, we will pin it to a register.") \
>+    v(bool, useWebAssemblyStreamingApi, true, Normal, "Allow to run WebAssembly's Streaming API") \
>     v(bool, useCallICsForWebAssemblyToJSCalls, true, Normal, "If true, we will use CallLinkInfo to inline cache Wasm to JS calls.") \
>     v(bool, useEagerWebAssemblyModuleHashing, false, Normal, "Unnamed WebAssembly modules are identified in backtraces through their hash, if available.") \
>     v(bool, useObjectRestSpread, true, Normal, "If true, we will enable Object Rest/Spread feature.") \
>@@ -530,6 +537,7 @@ enum OptionEquivalence {
>     v(enableDollarVM, useDollarVM, SameOption) \
>     v(enableWebAssembly, useWebAssembly, SameOption) \
>     v(enableAsyncIterator, useAsyncIterator, SameOption) \
>+    v(enableWebAssemblyStreamingApi, useWebAssemblyStreamingApi, SameOption) \
>     v(verboseDFGByteCodeParsing, verboseDFGBytecodeParsing, SameOption) \
> 
> 
>diff --git a/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.cpp b/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.cpp
>index c7ad0e3ddca8d64449af159171afcb86a380ea69..fde2506be921af90a2117a940292350b215ffa21 100644
>--- a/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.cpp
>+++ b/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.cpp
>@@ -31,6 +31,7 @@
> #include "CatchScope.h"
> #include "Exception.h"
> #include "FunctionPrototype.h"
>+#include "JSCBuiltins.h"
> #include "JSCInlines.h"
> #include "JSModuleNamespaceObject.h"
> #include "JSPromiseDeferred.h"
>@@ -39,6 +40,7 @@
> #include "JSWebAssemblyInstance.h"
> #include "JSWebAssemblyModule.h"
> #include "ObjectConstructor.h"
>+#include "Options.h"
> #include "PromiseDeferredTimer.h"
> #include "StrongInlines.h"
> #include "ThrowScope.h"
>@@ -80,6 +82,32 @@ static void reject(ExecState* exec, CatchScope& catchScope, JSPromiseDeferred* p
>     CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, void());
> }
> 
>+static void webAssemblyModuleValidateAsyncInternal(ExecState* exec, JSPromiseDeferred* promise, Vector<uint8_t>&& source)
>+{
>+    VM& vm = exec->vm();
>+    auto* globalObject = exec->lexicalGlobalObject();
>+
>+    Vector<Strong<JSCell>> dependencies;
>+    dependencies.append(Strong<JSCell>(vm, globalObject));
>+
>+    vm.promiseDeferredTimer->addPendingPromise(promise, WTFMove(dependencies));
>+
>+    Wasm::Module::validateAsync(&vm.wasmContext, WTFMove(source), createSharedTask<Wasm::Module::CallbackType>([promise, globalObject, &vm] (Wasm::Module::ValidationResult&& result) mutable {
>+        vm.promiseDeferredTimer->scheduleWorkSoon(promise, [promise, globalObject, result = WTFMove(result), &vm] () mutable {
>+            auto scope = DECLARE_CATCH_SCOPE(vm);
>+            ExecState* exec = globalObject->globalExec();
>+            JSValue module = JSWebAssemblyModule::createStub(vm, exec, globalObject->WebAssemblyModuleStructure(), WTFMove(result));
>+            if (UNLIKELY(scope.exception())) {
>+                reject(exec, scope, promise);
>+                return;
>+            }
>+
>+            promise->resolve(exec, module);
>+            CLEAR_AND_RETURN_IF_EXCEPTION(scope, void());
>+        });
>+    }));
>+}
>+
> static EncodedJSValue JSC_HOST_CALL webAssemblyCompileFunc(ExecState* exec)
> {
>     VM& vm = exec->vm();
>@@ -91,31 +119,12 @@ static EncodedJSValue JSC_HOST_CALL webAssemblyCompileFunc(ExecState* exec)
> 
>     {
>         auto catchScope = DECLARE_CATCH_SCOPE(vm);
>-
>-        Vector<Strong<JSCell>> dependencies;
>-        dependencies.append(Strong<JSCell>(vm, globalObject));
>-        vm.promiseDeferredTimer->addPendingPromise(promise, WTFMove(dependencies));
>-
>         Vector<uint8_t> source = createSourceBufferFromValue(vm, exec, exec->argument(0));
> 
>         if (UNLIKELY(catchScope.exception()))
>             reject(exec, catchScope, promise);
>-        else {
>-            Wasm::Module::validateAsync(&vm.wasmContext, WTFMove(source), createSharedTask<Wasm::Module::CallbackType>([promise, globalObject, &vm] (Wasm::Module::ValidationResult&& result) mutable {
>-                vm.promiseDeferredTimer->scheduleWorkSoon(promise, [promise, globalObject, result = WTFMove(result), &vm] () mutable {
>-                    auto scope = DECLARE_CATCH_SCOPE(vm);
>-                    ExecState* exec = globalObject->globalExec();
>-                    JSValue module = JSWebAssemblyModule::createStub(vm, exec, globalObject->WebAssemblyModuleStructure(), WTFMove(result));
>-                    if (UNLIKELY(scope.exception())) {
>-                        reject(exec, scope, promise);
>-                        return;
>-                    }
>-
>-                    promise->resolve(exec, module);
>-                    CLEAR_AND_RETURN_IF_EXCEPTION(scope, void());
>-                });
>-            }));
>-        }
>+        else
>+            webAssemblyModuleValidateAsyncInternal(exec, promise, WTFMove(source));
> 
>         return JSValue::encode(promise->promise());
>     }
>@@ -144,6 +153,14 @@ static void resolve(VM& vm, ExecState* exec, JSPromiseDeferred* promise, JSWebAs
>     CLEAR_AND_RETURN_IF_EXCEPTION(scope, void());
> }
> 
>+void WebAssemblyPrototype::webAssemblyModuleValidateAsync(ExecState* exec, JSPromiseDeferred* promise, Vector<uint8_t>&& source)
>+{
>+    VM& vm = exec->vm();
>+    auto catchScope = DECLARE_CATCH_SCOPE(vm);
>+    webAssemblyModuleValidateAsyncInternal(exec, promise, WTFMove(source));
>+    CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, void());
>+}
>+
> static void instantiate(VM& vm, ExecState* exec, JSPromiseDeferred* promise, JSWebAssemblyModule* module, JSObject* importObject, const Identifier& moduleKey, Resolve resolveKind, Wasm::CreationMode creationMode)
> {
>     auto scope = DECLARE_CATCH_SCOPE(vm);
>@@ -205,6 +222,37 @@ JSValue WebAssemblyPrototype::instantiate(ExecState* exec, JSPromiseDeferred* pr
>     return promise->promise();
> }
> 
>+static void webAssemblyModuleInstantinateAsyncInternal(ExecState* exec, JSPromiseDeferred* promise, Vector<uint8_t>&& source, JSObject* importObject)
>+{
>+    auto* globalObject = exec->lexicalGlobalObject();
>+    VM& vm = exec->vm();
>+
>+    Vector<Strong<JSCell>> dependencies;
>+    dependencies.append(Strong<JSCell>(vm, importObject));
>+    vm.promiseDeferredTimer->addPendingPromise(promise, WTFMove(dependencies));
>+
>+    Wasm::Module::validateAsync(&vm.wasmContext, WTFMove(source), createSharedTask<Wasm::Module::CallbackType>([promise, importObject, globalObject, &vm] (Wasm::Module::ValidationResult&& result) mutable {
>+        vm.promiseDeferredTimer->scheduleWorkSoon(promise, [promise, importObject, globalObject, result = WTFMove(result), &vm] () mutable {
>+            auto scope = DECLARE_CATCH_SCOPE(vm);
>+            ExecState* exec = globalObject->globalExec();
>+            JSWebAssemblyModule* module = JSWebAssemblyModule::createStub(vm, exec, globalObject->WebAssemblyModuleStructure(), WTFMove(result));
>+            if (UNLIKELY(scope.exception()))
>+                return reject(exec, scope, promise);
>+
>+            instantiate(vm, exec, promise, module, importObject, JSWebAssemblyInstance::createPrivateModuleKey(),  Resolve::WithModuleAndInstance, Wasm::CreationMode::FromJS);
>+            CLEAR_AND_RETURN_IF_EXCEPTION(scope, reject(exec, scope, promise));
>+        });
>+    }));
>+}
>+
>+void WebAssemblyPrototype::webAssemblyModuleInstantinateAsync(ExecState* exec, JSPromiseDeferred* promise, Vector<uint8_t>&& source, JSObject* importedObject)
>+{
>+    VM& vm = exec->vm();
>+    auto catchScope = DECLARE_CATCH_SCOPE(vm);
>+    webAssemblyModuleInstantinateAsyncInternal(exec, promise, WTFMove(source), importedObject);
>+    CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, void());
>+}
>+
> static EncodedJSValue JSC_HOST_CALL webAssemblyInstantiateFunc(ExecState* exec)
> {
>     VM& vm = exec->vm();
>@@ -250,10 +298,72 @@ static EncodedJSValue JSC_HOST_CALL webAssemblyValidateFunc(ExecState* exec)
>     return JSValue::encode(jsBoolean(plan.parseAndValidateModule()));
> }
> 
>-WebAssemblyPrototype* WebAssemblyPrototype::create(VM& vm, JSGlobalObject*, Structure* structure)
>+EncodedJSValue JSC_HOST_CALL webAssemblyCompileStreamingInternal(ExecState* exec)
>+{
>+    VM& vm = exec->vm();
>+    auto* globalObject = exec->lexicalGlobalObject();
>+    auto catchScope = DECLARE_CATCH_SCOPE(vm);
>+
>+    JSPromiseDeferred* promise = JSPromiseDeferred::create(exec, globalObject);
>+
>+    Vector<Strong<JSCell>> dependencies;
>+    dependencies.append(Strong<JSCell>(vm, globalObject));
>+    vm.promiseDeferredTimer->addPendingPromise(promise, WTFMove(dependencies));
>+
>+    if (globalObject->globalObjectMethodTable()->compileStreaming)
>+        globalObject->globalObjectMethodTable()->compileStreaming(globalObject, exec, promise, exec->argument(0));
>+    else {
>+        // CompileStreaming is not supported in jsc, only in browser environment
>+        ASSERT_NOT_REACHED();
>+    }
>+
>+    CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, JSValue::encode(promise->promise()));
>+
>+    return JSValue::encode(promise->promise());
>+}
>+
>+EncodedJSValue JSC_HOST_CALL webAssemblyInstantiateStreamingInternal(ExecState* exec)
>+{
>+    VM& vm = exec->vm();
>+    auto throwScope = DECLARE_THROW_SCOPE(vm);
>+    auto* globalObject = exec->lexicalGlobalObject();
>+
>+    JSPromiseDeferred* promise = JSPromiseDeferred::create(exec, globalObject);
>+
>+    RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
>+    {
>+        auto catchScope = DECLARE_CATCH_SCOPE(vm);
>+
>+        JSValue importArgument = exec->argument(1);
>+        JSObject* importObject = importArgument.getObject();
>+        if (UNLIKELY(!importArgument.isUndefined() && !importObject)) {
>+            promise->reject(exec, createTypeError(exec,
>+                ASCIILiteral("second argument to WebAssembly.instantiateStreaming must be undefined or an Object"), defaultSourceAppender, runtimeTypeForValue(importArgument)));
>+            CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, JSValue::encode(promise->promise()));
>+        } else {
>+            if (globalObject->globalObjectMethodTable()->instantiateStreaming) {
>+                Vector<Strong<JSCell>> dependencies;
>+                dependencies.append(Strong<JSCell>(vm, globalObject));
>+                dependencies.append(Strong<JSCell>(vm, importObject));
>+                vm.promiseDeferredTimer->addPendingPromise(promise, WTFMove(dependencies));
>+
>+                // FIXME: <http://webkit.org/b/184888> if there's an importObject and it contains a Memory, then we can compile the module with the right memory type (fast or not) by looking at the memory's type.
>+                globalObject->globalObjectMethodTable()->instantiateStreaming(globalObject, exec, promise, exec->argument(0), importObject);
>+            } else {
>+                // InstantiateStreaming is not supported in jsc, only in browser environment.
>+                ASSERT_NOT_REACHED();
>+            }
>+        }
>+        CLEAR_AND_RETURN_IF_EXCEPTION(catchScope, JSValue::encode(promise->promise()));
>+
>+        return JSValue::encode(promise->promise());
>+    }
>+}
>+
>+WebAssemblyPrototype* WebAssemblyPrototype::create(VM& vm, JSGlobalObject* globalObject, Structure* structure)
> {
>     auto* object = new (NotNull, allocateCell<WebAssemblyPrototype>(vm.heap)) WebAssemblyPrototype(vm, structure);
>-    object->finishCreation(vm);
>+    object->finishCreation(vm, globalObject);
>     return object;
> }
> 
>@@ -262,9 +372,14 @@ Structure* WebAssemblyPrototype::createStructure(VM& vm, JSGlobalObject* globalO
>     return Structure::create(vm, globalObject, prototype, TypeInfo(ObjectType, StructureFlags), info());
> }
> 
>-void WebAssemblyPrototype::finishCreation(VM& vm)
>+void WebAssemblyPrototype::finishCreation(VM& vm, JSGlobalObject* globalObject)
> {
>     Base::finishCreation(vm);
>+
>+    if (Options::useWebAssemblyStreamingApi()) {
>+        JSC_BUILTIN_FUNCTION_WITHOUT_TRANSITION("compileStreaming", webAssemblyPrototypeCompileStreamingCodeGenerator, static_cast<unsigned>(PropertyAttribute::DontEnum));
>+        JSC_BUILTIN_FUNCTION_WITHOUT_TRANSITION("instantiateStreaming", webAssemblyPrototypeInstantiateStreamingCodeGenerator, static_cast<unsigned>(PropertyAttribute::DontEnum));
>+    }
> }
> 
> WebAssemblyPrototype::WebAssemblyPrototype(VM& vm, Structure* structure)
>diff --git a/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h b/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h
>index bbb226dbcc699e3f0f0b8af1c95470559c6954a1..78c879fa3be09acce37483b3650d02d83e39ec22 100644
>--- a/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h
>+++ b/Source/JavaScriptCore/wasm/js/WebAssemblyPrototype.h
>@@ -39,18 +39,23 @@ public:
> 
>     static WebAssemblyPrototype* create(VM&, JSGlobalObject*, Structure*);
>     static Structure* createStructure(VM&, JSGlobalObject*, JSValue);
>+    JS_EXPORT_PRIVATE static void webAssemblyModuleValidateAsync(ExecState*, JSPromiseDeferred*, Vector<uint8_t>&&);
>+    JS_EXPORT_PRIVATE static void webAssemblyModuleInstantinateAsync(ExecState*, JSPromiseDeferred*, Vector<uint8_t>&&, JSObject*);
> 
>     DECLARE_INFO;
> 
>     static JSValue instantiate(ExecState*, JSPromiseDeferred*, const Identifier&, JSValue);
> 
> protected:
>-    void finishCreation(VM&);
>+    void finishCreation(VM&, JSGlobalObject*);
> 
> private:
>     WebAssemblyPrototype(VM&, Structure*);
> };
> 
>+EncodedJSValue JSC_HOST_CALL webAssemblyCompileStreamingInternal(ExecState*);
>+EncodedJSValue JSC_HOST_CALL webAssemblyInstantiateStreamingInternal(ExecState*);
>+
> } // namespace JSC
> 
> #endif // ENABLE(WEBASSEMBLY)
>diff --git a/Source/WebCore/Configurations/FeatureDefines.xcconfig b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Source/WebCore/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebCore/PAL/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebCore/bindings/js/JSDOMWindowBase.cpp b/Source/WebCore/bindings/js/JSDOMWindowBase.cpp
>index da35c16813b79259c2ebd4193a4dfe724e588d15..893c386e077b13948d5e23b3cde94a3b900dc9f1 100644
>--- a/Source/WebCore/bindings/js/JSDOMWindowBase.cpp
>+++ b/Source/WebCore/bindings/js/JSDOMWindowBase.cpp
>@@ -29,11 +29,13 @@
> #include "CommonVM.h"
> #include "DOMWindow.h"
> #include "Document.h"
>+#include "FetchResponse.h"
> #include "Frame.h"
> #include "InspectorController.h"
> #include "JSDOMBindingSecurity.h"
> #include "JSDOMGlobalObjectTask.h"
> #include "JSDOMWindowCustom.h"
>+#include "JSFetchResponse.h"
> #include "JSMainThreadExecState.h"
> #include "JSNode.h"
> #include "Logging.h"
>@@ -50,6 +52,7 @@
> #include <JavaScriptCore/JSInternalPromiseDeferred.h>
> #include <JavaScriptCore/Microtask.h>
> #include <JavaScriptCore/StrongInlines.h>
>+#include <JavaScriptCore/WebAssemblyPrototype.h>
> #include <wtf/Language.h>
> #include <wtf/MainThread.h>
> 
>@@ -75,7 +78,9 @@ const GlobalObjectMethodTable JSDOMWindowBase::s_globalObjectMethodTable = {
>     &moduleLoaderCreateImportMetaProperties,
>     &moduleLoaderEvaluate,
>     &promiseRejectionTracker,
>-    &defaultLanguage
>+    &defaultLanguage,
>+    &compileStreaming,
>+    &instantiateStreaming
> };
> 
> JSDOMWindowBase::JSDOMWindowBase(VM& vm, Structure* structure, RefPtr<DOMWindow>&& window, JSWindowProxy* proxy)
>@@ -364,6 +369,117 @@ JSC::JSObject* JSDOMWindowBase::moduleLoaderCreateImportMetaProperties(JSC::JSGl
>     return constructEmptyObject(exec, globalObject->nullPrototypeObjectStructure());
> }
> 
>+static std::optional<Vector<uint8_t>> tryAllocate(JSC::ExecState* exec, JSC::JSPromiseDeferred* promise, const char* data, size_t byteSize)
>+{
>+    Vector<uint8_t> arrayBuffer;
>+    if (!arrayBuffer.tryReserveCapacity(byteSize)) {
>+        promise->reject(exec, createOutOfMemoryError(exec));
>+        return std::nullopt;
>+    }
>+
>+    arrayBuffer.grow(byteSize);
>+    memcpy(arrayBuffer.data(), data, byteSize);
>+
>+    return arrayBuffer;
>+}
>+
>+static bool isResponseCorrect(JSC::ExecState* exec, FetchResponse* inputResponse, JSC::JSPromiseDeferred* promise)
>+{
>+    bool isResponseCorsSameOrigin = inputResponse->type() == ResourceResponse::Type::Basic || inputResponse->type() == ResourceResponse::Type::Cors || inputResponse->type() == ResourceResponse::Type::Default;
>+
>+    if (!isResponseCorsSameOrigin) {
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("Response is not CORS-same-origin")));
>+        return false;
>+    }
>+
>+    if (!inputResponse->ok()) {
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("Response has not returned OK status")));
>+        return false;
>+    }
>+
>+    auto contentType = inputResponse->headers().fastGet(HTTPHeaderName::ContentType);
>+    if (!equalLettersIgnoringASCIICase(contentType, "application/wasm")) {
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("Unexpected response MIME type. Expected 'application/wasm'")));
>+        return false;
>+    }
>+
>+    return true;
>+}
>+
>+void JSDOMWindowBase::compileStreaming(JSC::JSGlobalObject* globalObject, JSC::ExecState* exec, JSC::JSPromiseDeferred* promise, JSC::JSValue source)
>+{
>+    handleStreamingAction(globalObject, exec, promise, source, [promise] (JSC::ExecState* exec, const char* data, size_t byteSize) mutable {
>+        if (auto arrayBuffer = tryAllocate(exec, promise, data, byteSize))
>+            JSC::WebAssemblyPrototype::webAssemblyModuleValidateAsync(exec, promise, WTFMove(*arrayBuffer));
>+    });
>+}
>+
>+void JSDOMWindowBase::instantiateStreaming(JSC::JSGlobalObject* globalObject, JSC::ExecState* exec, JSC::JSPromiseDeferred* promise, JSC::JSValue source, JSC::JSObject* importedObject)
>+{
>+    handleStreamingAction(globalObject, exec, promise, source, [promise, importedObject] (JSC::ExecState* exec, const char* data, size_t byteSize) mutable {
>+        if (auto arrayBuffer = tryAllocate(exec, promise, data, byteSize))
>+            JSC::WebAssemblyPrototype::webAssemblyModuleInstantinateAsync(exec, promise, WTFMove(*arrayBuffer), importedObject);
>+    });
>+}
>+
>+void JSDOMWindowBase::handleStreamingAction(JSC::JSGlobalObject* globalObject, JSC::ExecState* exec, JSC::JSPromiseDeferred* promise, JSC::JSValue source, std::function<void(JSC::ExecState* exec, const char* data, size_t byteSize)>&& callback)
>+{
>+    ASSERT(source);
>+    VM& vm = exec->vm();
>+    if (auto inputResponse = JSFetchResponse::toWrapped(vm, source))
>+        handleResponseOnStreamingAction(globalObject, exec, inputResponse, promise, WTFMove(callback));
>+    else
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("first argument must be an Response or Promise for Response")));
>+}
>+
>+void JSDOMWindowBase::handleResponseOnStreamingAction(JSC::JSGlobalObject* globalObject, JSC::ExecState* exec, FetchResponse* inputResponse, JSC::JSPromiseDeferred* promise, std::function<void(JSC::ExecState* exec, const char* data, size_t byteSize)>&& actionCallback)
>+{
>+    if (!isResponseCorrect(exec, inputResponse, promise))
>+        return;
>+
>+    if (inputResponse->isBodyReceivedByChunk()) {
>+        inputResponse->consumeBodyReceivedByChunk([promise, callback = WTFMove(actionCallback), globalObject, data = SharedBuffer::create()] (auto&& result) mutable {
>+            ExecState* exec = globalObject->globalExec();
>+            if (result.hasException()) {
>+                promise->reject(exec, createTypeError(exec, result.exception().message()));
>+                return;
>+            }
>+
>+            if (auto chunk = result.returnValue())
>+                data->append(reinterpret_cast<const char*>(chunk->data), chunk->size);
>+            else {
>+                VM& vm = exec->vm();
>+                JSLockHolder lock(vm);
>+
>+                callback(exec, data->data(), data->size());
>+            }
>+        });
>+        return;
>+    }
>+
>+    auto body = inputResponse->consumeBody();
>+    WTF::switchOn(body, [&] (Ref<FormData>& formData) {
>+        if (auto buffer = formData->asSharedBuffer()) {
>+            VM& vm = exec->vm();
>+            JSLockHolder lock(vm);
>+
>+            auto callback = WTFMove(actionCallback);
>+            callback(exec, buffer->data(), buffer->size());
>+            return;
>+        }
>+        // FIXME: http://webkit.org/b/184886> Implement loading for the Blob type
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("Unexpected Response's Content-type")));
>+    }, [&] (Ref<SharedBuffer>& buffer) {
>+        VM& vm = exec->vm();
>+        JSLockHolder lock(vm);
>+
>+        auto callback = WTFMove(actionCallback);
>+        callback(exec, buffer->data(), buffer->size());
>+    }, [&] (std::nullptr_t&) {
>+        promise->reject(exec, createTypeError(exec, ASCIILiteral("Unexpected Response's Content-type")));
>+    });
>+}
>+
> void JSDOMWindowBase::promiseRejectionTracker(JSGlobalObject* jsGlobalObject, ExecState* exec, JSPromise* promise, JSPromiseRejectionOperation operation)
> {
>     // https://html.spec.whatwg.org/multipage/webappapis.html#the-hostpromiserejectiontracker-implementation
>diff --git a/Source/WebCore/bindings/js/JSDOMWindowBase.h b/Source/WebCore/bindings/js/JSDOMWindowBase.h
>index f5709a9fca0951a04ad17f60fa53e5e3624bf6e0..2efcc93af913b3e3000a1b49943342fdfa95374c 100644
>--- a/Source/WebCore/bindings/js/JSDOMWindowBase.h
>+++ b/Source/WebCore/bindings/js/JSDOMWindowBase.h
>@@ -42,6 +42,7 @@ namespace WebCore {
> 
> class DOMWrapperWorld;
> class Frame;
>+class FetchResponse;
> class JSDOMWindow;
> class JSDOMWindowBasePrivate;
> class JSWindowProxy;
>@@ -88,12 +89,20 @@ protected:
>     JSC::WatchpointSet m_windowCloseWatchpoints;
> 
> private:
>+    using ResponseCallback = WTF::Function<void(const char*, size_t)>;
>+
>     static JSC::Identifier moduleLoaderResolve(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue, JSC::JSValue, JSC::JSValue);
>     static JSC::JSInternalPromise* moduleLoaderFetch(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue, JSC::JSValue, JSC::JSValue);
>     static JSC::JSValue moduleLoaderEvaluate(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue, JSC::JSValue, JSC::JSValue);
>     static JSC::JSInternalPromise* moduleLoaderImportModule(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSString*, JSC::JSValue, const JSC::SourceOrigin&);
>     static JSC::JSObject* moduleLoaderCreateImportMetaProperties(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSModuleLoader*, JSC::JSValue, JSC::JSModuleRecord*, JSC::JSValue);
> 
>+    static void compileStreaming(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSPromiseDeferred*, JSC::JSValue);
>+    static void instantiateStreaming(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSPromiseDeferred*, JSC::JSValue, JSC::JSObject*);
>+    
>+    static void handleStreamingAction(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSPromiseDeferred*, JSC::JSValue, std::function<void(JSC::ExecState*, const char*, size_t)>&& callback);
>+    static void handleResponseOnStreamingAction(JSC::JSGlobalObject*, JSC::ExecState*, FetchResponse*, JSC::JSPromiseDeferred*, std::function<void(JSC::ExecState*, const char*, size_t)>&& callback);
>+
>     static void promiseRejectionTracker(JSC::JSGlobalObject*, JSC::ExecState*, JSC::JSPromise*, JSC::JSPromiseRejectionOperation);
> 
>     RefPtr<DOMWindow> m_wrapped;
>diff --git a/Source/WebCore/bindings/js/JSRemoteDOMWindowBase.cpp b/Source/WebCore/bindings/js/JSRemoteDOMWindowBase.cpp
>index 47e340190f7b04472ddcca57f268e96a9942f9fa..66d2c8df9a87f7fad03cbc231ad13e28c205f595 100644
>--- a/Source/WebCore/bindings/js/JSRemoteDOMWindowBase.cpp
>+++ b/Source/WebCore/bindings/js/JSRemoteDOMWindowBase.cpp
>@@ -48,6 +48,8 @@ const GlobalObjectMethodTable JSRemoteDOMWindowBase::s_globalObjectMethodTable =
>     nullptr, // moduleLoaderEvaluate
>     nullptr, // promiseRejectionTracker
>     nullptr, // defaultLanguage
>+    nullptr, // compileStreaming
>+    nullptr, // instantiateStreaming
> };
> 
> JSRemoteDOMWindowBase::JSRemoteDOMWindowBase(VM& vm, Structure* structure, RefPtr<RemoteDOMWindow>&& window, JSWindowProxy* proxy)
>diff --git a/Source/WebCore/bindings/js/JSWorkerGlobalScopeBase.cpp b/Source/WebCore/bindings/js/JSWorkerGlobalScopeBase.cpp
>index 85bf75c51b2b2ffe7a74742fa0ddfb73c13b5b7a..fd60df88afd6e09166c41b0279d22318dad888e3 100644
>--- a/Source/WebCore/bindings/js/JSWorkerGlobalScopeBase.cpp
>+++ b/Source/WebCore/bindings/js/JSWorkerGlobalScopeBase.cpp
>@@ -61,7 +61,9 @@ const GlobalObjectMethodTable JSWorkerGlobalScopeBase::s_globalObjectMethodTable
>     nullptr, // moduleLoaderCreateImportMetaProperties
>     nullptr, // moduleLoaderEvaluate
>     nullptr, // promiseRejectionTracker
>-    &defaultLanguage
>+    &defaultLanguage,
>+    nullptr, // compileStreaming
>+    nullptr, // instantiateStreaming
> };
> 
> JSWorkerGlobalScopeBase::JSWorkerGlobalScopeBase(JSC::VM& vm, JSC::Structure* structure, RefPtr<WorkerGlobalScope>&& impl)
>diff --git a/Source/WebKit/Configurations/FeatureDefines.xcconfig b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Source/WebKit/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKit/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>+++ b/Source/WebKitLegacy/mac/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/Source/cmake/WebKitFeatures.cmake b/Source/cmake/WebKitFeatures.cmake
>index 6aa7eebbbf2de89295c5ff3fded928806a77dd04..80c019c3fad2e9933fe3ccb36c11ee27b4679b78 100644
>--- a/Source/cmake/WebKitFeatures.cmake
>+++ b/Source/cmake/WebKitFeatures.cmake
>@@ -174,6 +174,7 @@ macro(WEBKIT_OPTION_BEGIN)
>     WEBKIT_OPTION_DEFINE(ENABLE_VIDEO_TRACK "Toggle Track support for HTML5 video" PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN "Toggle video element fullscreen support" PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEBASSEMBLY "Toggle WebAssembly support" PRIVATE ${ENABLE_FTL_DEFAULT})
>+    WEBKIT_OPTION_DEFINE(ENABLE_WEBASSEMBLY_STREAMING_API "Toggle WebAssembly streaming api support." PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEBDRIVER "Whether to enable the WebDriver service process" PRIVATE OFF)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEBGL "Toggle WebGL support" PRIVATE ON)
>     WEBKIT_OPTION_DEFINE(ENABLE_WEBGL2 "Toggle WebGL 2.0 support" PRIVATE OFF)
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 92e52145c54ab0b7f2e8a2adb0c73edb70483a77..babe76cafbe3d29bd51f6c538e34ce3d1675560a 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,12 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * TestWebKitAPI/Configurations/FeatureDefines.xcconfig:
>+
> 2018-04-25  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         [WPE] Build and link against latest WPEBackend and WPEBackend-fdo
>diff --git a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>index 37a63748fc031816d4969fe2490edf6c8657493d..576b7e41b34fdc5fdaabcaeb9701f19c724cecdd 100644
>--- a/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>+++ b/Tools/TestWebKitAPI/Configurations/FeatureDefines.xcconfig
>@@ -354,6 +354,8 @@ ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN_macosx = ENABLE_VIDEO_USES_ELEMENT_FULLSCRE
> 
> ENABLE_WEBASSEMBLY = ;
> 
>+ENABLE_WEBASSEMBLY_STREAMING_API = ENABLE_WEBASSEMBLY_STREAMING_API;
>+
> ENABLE_WEBGL = ENABLE_WEBGL;
> 
> ENABLE_WEBGL2 = ENABLE_WEBGL2;
>@@ -380,4 +382,4 @@ ENABLE_WIRELESS_PLAYBACK_TARGET = ENABLE_WIRELESS_PLAYBACK_TARGET;
> 
> ENABLE_XSLT = ENABLE_XSLT;
> 
>-FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>+FEATURE_DEFINES = $(ENABLE_3D_TRANSFORMS) $(ENABLE_ACCELERATED_2D_CANVAS) $(ENABLE_ACCELERATED_OVERFLOW_SCROLLING) $(ENABLE_APPLE_PAY) $(ENABLE_APPLE_PAY_SESSION_V3) $(ENABLE_APPLICATION_MANIFEST) $(ENABLE_ATTACHMENT_ELEMENT) $(ENABLE_AVF_CAPTIONS) $(ENABLE_CACHE_PARTITIONING) $(ENABLE_CHANNEL_MESSAGING) $(ENABLE_CONTENT_FILTERING) $(ENABLE_CSS3_TEXT) $(ENABLE_CSS_ANIMATIONS_LEVEL_2) $(ENABLE_CSS_BOX_DECORATION_BREAK) $(ENABLE_CSS_COMPOSITING) $(ENABLE_CSS_DEVICE_ADAPTATION) $(ENABLE_CSS_IMAGE_ORIENTATION) $(ENABLE_CSS_IMAGE_RESOLUTION) $(ENABLE_CSS_SCROLL_SNAP) $(ENABLE_CSS_SELECTORS_LEVEL4) $(ENABLE_CSS_TRAILING_WORD) $(ENABLE_CURSOR_VISIBILITY) $(ENABLE_CUSTOM_SCHEME_HANDLER) $(ENABLE_DASHBOARD_SUPPORT) $(ENABLE_DATA_INTERACTION) $(ENABLE_DATACUE_VALUE) $(ENABLE_DATALIST_ELEMENT) $(ENABLE_DEVICE_ORIENTATION) $(ENABLE_DRAG_SUPPORT) $(ENABLE_ENCRYPTED_MEDIA) $(ENABLE_EXTRA_ZOOM_MODE) $(ENABLE_FAST_JIT_PERMISSIONS) $(ENABLE_FILTERS_LEVEL_2) $(ENABLE_FTL_JIT) $(ENABLE_FULLSCREEN_API) $(ENABLE_GAMEPAD) $(ENABLE_GEOLOCATION) $(ENABLE_ICONDATABASE) $(ENABLE_INDEXED_DATABASE) $(ENABLE_INDEXED_DATABASE_IN_WORKERS) $(ENABLE_INPUT_TYPE_COLOR) $(ENABLE_INPUT_TYPE_COLOR_POPOVER) $(ENABLE_INPUT_TYPE_DATE) $(ENABLE_INPUT_TYPE_DATETIME_INCOMPLETE) $(ENABLE_INPUT_TYPE_DATETIMELOCAL) $(ENABLE_INPUT_TYPE_MONTH) $(ENABLE_INPUT_TYPE_TIME) $(ENABLE_INPUT_TYPE_WEEK) $(ENABLE_INTERSECTION_OBSERVER) $(ENABLE_INTL) $(ENABLE_IOS_GESTURE_EVENTS) $(ENABLE_IOS_TOUCH_EVENTS) $(ENABLE_JIT) $(ENABLE_JS_ASYNC_ITERATION) $(ENABLE_KEYBOARD_CODE_ATTRIBUTE) $(ENABLE_KEYBOARD_KEY_ATTRIBUTE) $(ENABLE_LAYOUT_FORMATTING_CONTEXT) $(ENABLE_LEGACY_CSS_VENDOR_PREFIXES) $(ENABLE_LEGACY_CUSTOM_PROTOCOL_MANAGER) $(ENABLE_LEGACY_ENCRYPTED_MEDIA) $(ENABLE_LETTERPRESS) $(ENABLE_MAC_GESTURE_EVENTS) $(ENABLE_MAC_VIDEO_TOOLBOX) $(ENABLE_MATHML) $(ENABLE_MEDIA_CAPTURE) $(ENABLE_MEDIA_CONTROLS_SCRIPT) $(ENABLE_MEDIA_SESSION) $(ENABLE_MEDIA_SOURCE) $(ENABLE_MEDIA_STATISTICS) $(ENABLE_MEDIA_STREAM) $(ENABLE_METER_ELEMENT) $(ENABLE_MINIMAL_SIMULATOR) $(ENABLE_MHTML) $(ENABLE_MOUSE_CURSOR_SCALE) $(ENABLE_NAVIGATOR_CONTENT_UTILS) $(ENABLE_NAVIGATOR_STANDALONE) $(ENABLE_NOTIFICATIONS) $(ENABLE_PAYMENT_REQUEST) $(ENABLE_PDFKIT_PLUGIN) $(ENABLE_POINTER_LOCK) $(ENABLE_PUBLIC_SUFFIX_LIST) $(ENABLE_QUOTA) $(ENABLE_REMOTE_INSPECTOR) $(ENABLE_RESOLUTION_MEDIA_QUERY) $(ENABLE_RESOURCE_USAGE) $(ENABLE_RUBBER_BANDING) $(ENABLE_SERVICE_CONTROLS) $(ENABLE_SERVICE_WORKER) $(ENABLE_SPEECH_SYNTHESIS) $(ENABLE_STREAMS_API) $(ENABLE_SUBTLE_CRYPTO) $(ENABLE_SVG_FONTS) $(ENABLE_TELEPHONE_NUMBER_DETECTION) $(ENABLE_TEXT_AUTOSIZING) $(ENABLE_TOUCH_EVENTS) $(ENABLE_USER_MESSAGE_HANDLERS) $(ENABLE_USERSELECT_ALL) $(ENABLE_VARIATION_FONTS) $(ENABLE_VIDEO) $(ENABLE_VIDEO_PRESENTATION_MODE) $(ENABLE_VIDEO_TRACK) $(ENABLE_VIDEO_USES_ELEMENT_FULLSCREEN) $(ENABLE_WEB_AUDIO) $(ENABLE_WEB_AUTHN) $(ENABLE_WEB_RTC) $(ENABLE_WEBASSEMBLY) $(ENABLE_WEBASSEMBLY_STREAMING_API) $(ENABLE_WEBGL) $(ENABLE_WEBGL2) $(ENABLE_WEBGPU) $(ENABLE_WIRELESS_PLAYBACK_TARGET) $(ENABLE_XSLT);
>diff --git a/LayoutTests/imported/w3c/ChangeLog b/LayoutTests/imported/w3c/ChangeLog
>index a9f5633df9c1a6d2af8991a77a1341506c810562..59ffa32467a775e88bb9c422d18340d60c89b0ee 100644
>--- a/LayoutTests/imported/w3c/ChangeLog
>+++ b/LayoutTests/imported/w3c/ChangeLog
>@@ -1,3 +1,20 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * web-platform-tests/wasm/resources/incrementer.no_mime_type.wasm: Added.
>+        * web-platform-tests/wasm/resources/incrementer.wasm: Added.
>+        * web-platform-tests/wasm/resources/incrementer.wasm.headers: Added.
>+        * web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm: Added.
>+        * web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm.headers: Added.
>+        * web-platform-tests/wasm/wasm_stream_compile_test-expected.txt: Added.
>+        * web-platform-tests/wasm/wasm_stream_compile_test.html: Added.
>+        * web-platform-tests/wasm/wasm_stream_instantinate_test-expected.txt: Added.
>+        * web-platform-tests/wasm/wasm_stream_instantinate_test.html: Added.
>+
> 2018-04-25  Youenn Fablet  <youenn@apple.com>
> 
>         Use NetworkLoadChecker for all subresource loads except fetch/XHR
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.no_mime_type.wasm b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.no_mime_type.wasm
>new file mode 100644
>index 0000000000000000000000000000000000000000..47afcdef2a2812acccecd0f203d30d3023593f3d
>GIT binary patch
>literal 46
>zcmZQbEY4+QU|?WmV@zPIXRK#tVq{?FW#r7vOD;;yP0cG|VBq3pWM@!daAeHl1^}?K
>B2ZjIu
>
>literal 0
>HcmV?d00001
>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wasm b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wasm
>new file mode 100644
>index 0000000000000000000000000000000000000000..47afcdef2a2812acccecd0f203d30d3023593f3d
>GIT binary patch
>literal 46
>zcmZQbEY4+QU|?WmV@zPIXRK#tVq{?FW#r7vOD;;yP0cG|VBq3pWM@!daAeHl1^}?K
>B2ZjIu
>
>literal 0
>HcmV?d00001
>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wasm.headers b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wasm.headers
>new file mode 100644
>index 0000000000000000000000000000000000000000..76b9c163b6cd337d653dce90f82b3ab24dc1239a
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wasm.headers
>@@ -0,0 +1,2 @@
>+Content-Type: application/wasm
>+Cache-Control: max-age=3600
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm
>new file mode 100644
>index 0000000000000000000000000000000000000000..47afcdef2a2812acccecd0f203d30d3023593f3d
>GIT binary patch
>literal 46
>zcmZQbEY4+QU|?WmV@zPIXRK#tVq{?FW#r7vOD;;yP0cG|VBq3pWM@!daAeHl1^}?K
>B2ZjIu
>
>literal 0
>HcmV?d00001
>
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm.headers b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm.headers
>new file mode 100644
>index 0000000000000000000000000000000000000000..833ee71634def23f8dc089c8f89fbc09d8d69754
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/resources/incrementer.wrong_mime_type.wasm.headers
>@@ -0,0 +1,2 @@
>+Content-Type: text/css
>+Cache-Control: max-age=3600
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..7829e917807bd8c5ea7e074e800cad8f118a06cf
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test-expected.txt
>@@ -0,0 +1,12 @@
>+
>+PASS compileStreaming using resolved response 
>+PASS compileStreaming using resolved response and check instantiate 
>+PASS compileStreaming using promise response from fetch and check instantiate 
>+PASS compileStreaming raise error if wrong mime type 
>+PASS compileStreaming raise error if no mime type 
>+PASS compileStreaming raise error if 404 status 
>+PASS compileStreaming check CORS 
>+PASS compileStreaming raise error if no-cors 
>+PASS compileStreaming receive promise with response created from ArrayBuffer 
>+PASS compileStreaming receive response that deliver data by chunks as bufferArray 
>+
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test.html b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..9273ff195a7262f07633b62e3e8458cec0dcd0db
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_compile_test.html
>@@ -0,0 +1,109 @@
>+<!DOCTYPE html>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script src="/common/get-host-info.sub.js"></script>
>+<script>
>+
>+  promise_test(async function() {
>+      var response = await fetch('resources/incrementer.wasm');
>+      const module = await WebAssembly.compileStreaming(response);
>+      assert_true(module instanceof WebAssembly.Module);
>+  }, "compileStreaming using resolved response");
>+
>+  promise_test(async function() {
>+      var response = await fetch('resources/incrementer.wasm');
>+      const module = await WebAssembly.compileStreaming(response);
>+      const instance = new WebAssembly.Instance(module);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+  }, "compileStreaming using resolved response and check instantiate");
>+
>+  promise_test(async function() {
>+      var result = fetch('resources/incrementer.wasm');
>+      const module = await WebAssembly.compileStreaming(result);
>+      const instance = new WebAssembly.Instance(module);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+  }, "compileStreaming using promise response from fetch and check instantiate");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer.wrong_mime_type.wasm');
>+      const module = await WebAssembly.compileStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_true(e.message.includes('MIME type'));
>+      assert_true(e instanceof Error);
>+    }
>+  }, "compileStreaming raise error if wrong mime type");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer.no_mime_type.wasm');
>+      const module = await WebAssembly.compileStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_true(e.message.includes('MIME type'));
>+      assert_true(e instanceof Error);
>+    }
>+  }, "compileStreaming raise error if no mime type");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer1.wasm');
>+      const module = await WebAssembly.compileStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_equals(e.message, "Response has not returned OK status");
>+      assert_true(e instanceof Error);
>+    }
>+  }, "compileStreaming raise error if 404 status");
>+
>+  const getWasmUrl = fileName => { 
>+    var host_info = get_host_info();
>+    var url = host_info.HTTP_ORIGIN_WITH_DIFFERENT_PORT  +  '/wasm/';
>+    return url + fileName + "?pipe=header(Access-Control-Allow-Origin,*)";
>+  };
>+
>+  promise_test(async function() {
>+      var result = fetch(getWasmUrl('resources/incrementer.wasm'), {"mode": "cors"} );
>+      const module = await WebAssembly.compileStreaming(result);
>+      assert_true(module instanceof WebAssembly.Module);
>+  }, "compileStreaming check CORS");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch(getWasmUrl('resources/incrementer.wasm'), {"mode": "no-cors"} );
>+      const module = await WebAssembly.compileStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_equals(e.message, "Response is not CORS-same-origin");
>+      assert_true(e instanceof Error);
>+    }
>+  }, "compileStreaming raise error if no-cors");
>+
>+  promise_test(async function() {
>+    const module = await fetch('resources/incrementer.wasm')
>+      .then(v => v.arrayBuffer())
>+      .then(v => WebAssembly.compileStreaming(new Response(v, { headers: { "Content-Type" : "application/wasm" }})));
>+    assert_true(module instanceof WebAssembly.Module);
>+  }, "compileStreaming receive promise with response created from ArrayBuffer");
>+
>+  promise_test(async function() {
>+    const module = await fetch('resources/incrementer.wasm')
>+      .then(v => v.arrayBuffer())
>+      .then(buffer => {
>+        const stream = new ReadableStream({ 
>+          start(controller) {
>+            (async () => {
>+              await Promise.resolve().then(() => controller.enqueue(buffer.slice(0, 20)));
>+              await Promise.resolve().then(() => controller.enqueue(buffer.slice(20, buffer.byteLength)));
>+              await Promise.resolve().then(() => controller.close());
>+            })();
>+          }
>+        });
>+        return stream; 
>+      }) 
>+      .then(stream => WebAssembly.compileStreaming(new Response(stream, { headers: { "Content-Type" : "application/wasm" }})));
>+    assert_true(module instanceof WebAssembly.Module);
>+  }, "compileStreaming receive response that deliver data by chunks as bufferArray");
>+</script>
>+
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test-expected.txt b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test-expected.txt
>new file mode 100644
>index 0000000000000000000000000000000000000000..0437fa4ddf2dbbb258e3fb9ea91bb35ced880417
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test-expected.txt
>@@ -0,0 +1,12 @@
>+
>+PASS instantiateStreaming using resolved response 
>+PASS instantiateStreaming using resolved response and check instantiate 
>+PASS instantiateStreaming using promise response from fetch and check instantiate 
>+PASS instantiateStreaming raise error if wrong mime type 
>+PASS instantiateStreaming raise error if no mime type 
>+PASS instantiateStreaming raise error if 404 status 
>+PASS instantiateStreaming check CORS 
>+PASS instantiateStreaming raise error if no-cors 
>+PASS instantiateStreaming receive promise with response created from ArrayBuffer 
>+PASS instantiateStreaming receive response that deliver data by chunks as bufferArray 
>+
>diff --git a/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test.html b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test.html
>new file mode 100644
>index 0000000000000000000000000000000000000000..2d0f35d6cfb668235de13273e611bc1d524f3b1b
>--- /dev/null
>+++ b/LayoutTests/imported/w3c/web-platform-tests/wasm/wasm_stream_instantinate_test.html
>@@ -0,0 +1,106 @@
>+<!DOCTYPE html>
>+<script src="/resources/testharness.js"></script>
>+<script src="/resources/testharnessreport.js"></script>
>+<script src="/common/get-host-info.sub.js"></script>
>+<script>
>+  promise_test(async function() {
>+      var response = await fetch('resources/incrementer.wasm');
>+      const { instance, module } = await WebAssembly.instantiateStreaming(response);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+      assert_true(module instanceof WebAssembly.Module);
>+  }, "instantiateStreaming using resolved response");
>+
>+  promise_test(async function() {
>+      var response = await fetch('resources/incrementer.wasm');
>+      const { instance } = await WebAssembly.instantiateStreaming(response);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+  }, "instantiateStreaming using resolved response and check instantiate");
>+
>+  promise_test(async function() {
>+      var result = fetch('resources/incrementer.wasm');
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+  }, "instantiateStreaming using promise response from fetch and check instantiate");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer.wrong_mime_type.wasm');
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_true(e.message.includes('MIME type'));
>+      assert_true(e instanceof Error);
>+    }
>+  }, "instantiateStreaming raise error if wrong mime type");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer.no_mime_type.wasm');
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_true(e.message.includes('MIME type'));
>+      assert_true(e instanceof Error);
>+    }
>+  }, "instantiateStreaming raise error if no mime type");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch('resources/incrementer1.wasm');
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_equals(e.message, "Response has not returned OK status");
>+      assert_true(e instanceof Error);
>+    }
>+  }, "instantiateStreaming raise error if 404 status");
>+
>+  const getWasmUrl = fileName => { 
>+    var host_info = get_host_info();
>+    var url = host_info.HTTP_ORIGIN_WITH_DIFFERENT_PORT  +  '/wasm/';
>+    return url + fileName + "?pipe=header(Access-Control-Allow-Origin,*)";
>+  };
>+
>+  promise_test(async function() {
>+      var result = fetch(getWasmUrl('resources/incrementer.wasm'), {"mode": "cors"} );
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(instance instanceof WebAssembly.Instance);
>+  }, "instantiateStreaming check CORS");
>+
>+  promise_test(async function() {
>+    try {
>+      var result = fetch(getWasmUrl('resources/incrementer.wasm'), {"mode": "no-cors"} );
>+      const { instance } = await WebAssembly.instantiateStreaming(result);
>+      assert_true(false);
>+    } catch (e) {
>+      assert_equals(e.message, "Response is not CORS-same-origin");
>+      assert_true(e instanceof Error);
>+    }
>+  }, "instantiateStreaming raise error if no-cors");
>+
>+  promise_test(async function() {
>+    const { instance } = await fetch('resources/incrementer.wasm')
>+      .then(v => v.arrayBuffer())
>+      .then(v => WebAssembly.instantiateStreaming(new Response(v, { headers: { "Content-Type" : "application/wasm" }})));
>+    assert_true(instance instanceof WebAssembly.Instance);
>+  }, "instantiateStreaming receive promise with response created from ArrayBuffer");
>+
>+  promise_test(async function() {
>+    const { instance } = a = await fetch('resources/incrementer.wasm')
>+      .then(v => v.arrayBuffer())
>+      .then(buffer => {
>+        const stream = new ReadableStream({ 
>+          start(controller) {
>+            (async () => {
>+              await Promise.resolve().then(() => controller.enqueue(buffer.slice(0, 20)));
>+              await Promise.resolve().then(() => controller.enqueue(buffer.slice(20, buffer.byteLength)));
>+              await Promise.resolve().then(() => controller.close());
>+            })();
>+          }
>+        });
>+        return stream; 
>+      }) 
>+      .then(stream => WebAssembly.instantiateStreaming(new Response(stream, { headers: { "Content-Type" : "application/wasm" }})));
>+    assert_true(instance instanceof WebAssembly.Instance);
>+  }, "instantiateStreaming receive response that deliver data by chunks as bufferArray");
>+</script>
>\ No newline at end of file
>diff --git a/ChangeLog b/ChangeLog
>index 4b6b5a8b7225d8e3236fd0d3cc393e2ac234a772..6a5c1cd4c2d5c2f465d9573eebf41112e58e1b64 100644
>--- a/ChangeLog
>+++ b/ChangeLog
>@@ -1,3 +1,14 @@
>+2018-04-24  Oleksandr Skachkov  <gskachkov@gmail.com>
>+
>+        WebAssembly: add support for stream APIs - JavaScript API
>+        https://bugs.webkit.org/show_bug.cgi?id=183442
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add WEBASSEMBLY_STREAMING_API feature flag
>+
>+        * Source/cmake/WebKitFeatures.cmake:
>+
> 2018-04-25  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         [WPE] Build and link against latest WPEBackend and WPEBackend-fdo

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Attachments on bug 183442: 337019 | 337296 | 338599 | 338662 | 338861 | 338864 | 338865 | 338869 | 338870 | 339089 | 339090 | 339093 | 339098 | 339100 | 339146