swiftwasm · kateinoigakukun · Mar 15, 2020 · Mar 15, 2020
diff --git a/Package.swift b/Package.swift
@@ -16,7 +16,9 @@ let package = Package(
                "-Xlinker",
                "--export=swjs_call_host_function",
                "-Xlinker",
-                "--export=swjs_prepare_host_function_call"
+                "--export=swjs_prepare_host_function_call",
+                "-Xlinker",
+                "--export=swjs_cleanup_host_function_call"
              ])
            ]),
        .target(

diff --git a/Runtime/src/index.ts b/Runtime/src/index.ts
@@ -11,6 +11,7 @@ declare const global: GlobalVariable;

 interface SwiftRuntimeExportedFunctions {
    swjs_prepare_host_function_call(size: number): pointer;
+    swjs_cleanup_host_function_call(argv: pointer): void;
    swjs_call_host_function(
        host_func_id: number,
        argv: pointer, argc: number,
@@ -112,6 +113,7 @@ export class SwiftRuntime {
                output = result
            })
            exports.swjs_call_host_function(host_func_id, argv, argc, callback_func_ref)
+            exports.swjs_cleanup_host_function_call(argv)
            return output
        }


diff --git a/Sources/JavaScriptKit/JSFunction.swift b/Sources/JavaScriptKit/JSFunction.swift
@@ -76,6 +76,11 @@ public func _prepare_host_function_call(_ argc: Int32) -> UnsafeMutableRawPointe
    return malloc(Int(argumentSize))!
 }

+@_cdecl("swjs_cleanup_host_function_call")
+public func _cleanup_host_function_call(_ pointer: UnsafeMutableRawPointer) {
+    free(pointer)
+}
+
 @_cdecl("swjs_call_host_function")
 public func _call_host_function(
    _ hostFuncRef: JavaScriptHostFuncRef,