feat: Update to Dart 3.8.1

Author: fuzzybinary

.dart_version

@@ -1,2 +1,2 @@
 # This file contains the current Dart version we build against
-3.6.2
+3.8.1

dart_sdk.patch

@@ -1,23 +1,23 @@
 diff --git a/BUILD.gn b/BUILD.gn
-index 3dd681d9d41..a8e43bc5953 100644
+index fb3ca5fc537..9760a092244 100644
 --- a/BUILD.gn
 +++ b/BUILD.gn
-@@ -100,6 +100,10 @@ group("create_sdk") {
-   public_deps = [ "sdk:create_sdk" ]
+@@ -127,6 +127,10 @@ group("create_platform_sdk") {
+   public_deps = [ "sdk:create_platform_sdk" ]
  }
 
 +group("libdart") {
 +  deps = [ "runtime/bin:libdart" ]
 +}
 +
- group("create_platform_sdk") {
-   public_deps = [ "sdk:create_platform_sdk" ]
- }
+ group("dart2js") {
+   import("runtime/runtime_args.gni")
+   if (dart_target_arch != "ia32" && dart_target_arch != "x86") {
 diff --git a/build/config/compiler/BUILD.gn b/build/config/compiler/BUILD.gn
-index 29ada988abb..2e4cf4ea9c8 100644
+index b77bab8676c..b9739fab43a 100644
 --- a/build/config/compiler/BUILD.gn
 +++ b/build/config/compiler/BUILD.gn
-@@ -260,8 +260,9 @@ config("compiler") {
+@@ -254,8 +254,9 @@ config("compiler") {
        cflags += [ "-fPIC" ]
        ldflags += [ "-fPIC" ]
      } else {
@@ -30,12 +30,12 @@ index 29ada988abb..2e4cf4ea9c8 100644
    }
 
 diff --git a/runtime/bin/BUILD.gn b/runtime/bin/BUILD.gn
-index be0893506f2..7c5bb919ad4 100644
+index 57d7006036d..fd677355210 100644
 --- a/runtime/bin/BUILD.gn
 +++ b/runtime/bin/BUILD.gn
-@@ -1170,3 +1170,47 @@ if (defined(is_linux) && is_linux && defined(is_asan) && is_asan &&
-     }
-   }
+@@ -1224,3 +1224,47 @@ static_library("dart_embedder_runtime_jit") {
+   output_name = "dart_embedder_runtime_jit"
+   deps = [ ":dart_embedder_runtime_jit_set" ]
  }
 +
 +static_library("libdart") {

examples/realtime_example/CMakeLists.txt

@@ -30,7 +30,7 @@ target_include_directories(realtime_example PRIVATE
 if(LINUX)
 	# -export-dynamic is required on Linux if your symbols are in your executable,
 	# otherwise dlsym (and therefore Dart FFI) can't find them.
-	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -export-dynamic")
+	set(CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -Wl,-export-dynamic")
 endif()
 
 if (WIN32)

examples/realtime_example/dart/main.dart

@@ -26,6 +26,7 @@ double dotX = 0;
 double dotY = 0;
 bool movingLeft = true;
 
+@pragma("vm:entry-point")
 void main() {
   print('main');
   walls.add(
@@ -48,6 +49,7 @@ void main() {
   drawable.ref.color.b = 0.0;
 }
 
+@pragma("vm:entry-point")
 void frame(double dt) {
   if (movingLeft) {
     dotX -= (speed * dt);

src/isolate_setup.cpp

@@ -183,7 +183,6 @@ Dart_Isolate CreateIsolate(bool is_main_isolate,
   uint8_t* kernel_buffer = nullptr;
   intptr_t kernel_buffer_size;
   AppSnapshot* app_snapshot = nullptr;
-  std::shared_ptr<uint8_t> kernel_buffer_ptr;
 
   bool isolate_run_app_snapshot = false;
   const uint8_t* isolate_snapshot_data = kDartCoreIsolateSnapshotData;
@@ -212,8 +211,7 @@ Dart_Isolate CreateIsolate(bool is_main_isolate,
 
   if (kernel_buffer == nullptr && !isolate_run_app_snapshot) {
     dfe.ReadScript(script_uri, app_snapshot, &kernel_buffer,
-                   &kernel_buffer_size, /*decode_uri=*/true,
-                   &kernel_buffer_ptr);
+                   &kernel_buffer_size, /*decode_uri=*/true);
   }
 
   flags->null_safety = true;