[Wasm] Introduce utilities to get package and name of class directly from metadata and use it in some places

compiler/testData/codegen/box/size/add.kt

@@ -1,6 +1,6 @@
 // TARGET_BACKEND: WASM
 
-// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 132_428 
+// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 114_138 
 // WASM_DCE_EXPECTED_OUTPUT_SIZE:  mjs  6_517 
 
 // FILE: test.kt

compiler/testData/codegen/box/size/helloWorld.kt

@@ -1,6 +1,6 @@
 // TARGET_BACKEND: WASM
 
-// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 132_749 
+// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 114_456 
 // WASM_DCE_EXPECTED_OUTPUT_SIZE:  mjs  6_458 
 
 fun box(): String {

compiler/testData/codegen/box/size/helloWorldDOM.kt

@@ -1,6 +1,6 @@
 // TARGET_BACKEND: WASM
 
-// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 135_298 
+// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 126_639 
 // WASM_DCE_EXPECTED_OUTPUT_SIZE:  mjs  6_956 
 
 // FILE: test.kt

compiler/testData/codegen/box/size/ok.kt

@@ -1,6 +1,6 @@
 // TARGET_BACKEND: WASM
 
-// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 132_479 
+// WASM_DCE_EXPECTED_OUTPUT_SIZE: wasm 114_189 
 // WASM_DCE_EXPECTED_OUTPUT_SIZE:  mjs  6_389 
 
 fun box() = "OK"

libraries/stdlib/wasm/builtins/kotlin/Any.kt

@@ -57,8 +57,10 @@ public open class Any @WasmPrimitiveConstructor constructor() {
      * Returns a string representation of the object.
      */
     public open fun toString(): String {
-        val typeData = getTypeInfoTypeDataByPtr(typeInfo)
-        val qualifiedName = if (typeData.packageName.isEmpty()) typeData.typeName else "${typeData.packageName}.${typeData.typeName}"
+        val typeInfoPtr = this.typeInfo
+        val packageName = getPackageName(typeInfoPtr)
+        val simpleName = getSimpleName(typeInfoPtr)
+        val qualifiedName = if (packageName.isEmpty()) simpleName else "$packageName.$simpleName"
         return "$qualifiedName@${identityHashCode()}"
     }
 }

libraries/stdlib/wasm/builtins/kotlin/Throwable.kt

@@ -6,6 +6,7 @@
 package kotlin
 
 import kotlin.wasm.internal.ExternalInterfaceType
+import kotlin.wasm.internal.getSimpleName
 import kotlin.wasm.internal.jsToKotlinStringAdapter
 
 /**
@@ -34,8 +35,7 @@ public open class Throwable(open val message: String?, open val cause: kotlin.Th
      * followed by the exception message if it is not null.
      */
     public override fun toString(): String {
-        val kClass = this::class
-        val s = kClass.simpleName ?: "Throwable"
+        val s = getSimpleName(this.typeInfo)
         return if (message != null) s + ": " + message.toString() else s
     }
 }

libraries/stdlib/wasm/internal/kotlin/wasm/internal/ExceptionHelpers.kt

@@ -17,7 +17,7 @@ private fun throwJsError(message: String?, wasmTypeName: String?, stack: String)
 }
 
 internal fun throwAsJsException(t: Throwable): Nothing {
-    throwJsError(t.message, t::class.simpleName, t.stackTraceToString())
+    throwJsError(t.message, getSimpleName(t.typeInfo), t.stackTraceToString())
 }
 
 internal var isNotFirstWasmExportCall: Boolean = false

libraries/stdlib/wasm/internal/kotlin/wasm/internal/TypeInfo.kt

@@ -25,17 +25,32 @@ internal val TypeInfoData.isInterfaceType
     get() = typeId < 0
 
 internal fun getTypeInfoTypeDataByPtr(typeInfoPtr: Int): TypeInfoData {
-    val fqNameLength = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_PACKAGE_NAME_LENGTH_OFFSET)
-    val fqNameId = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_PACKAGE_NAME_ID_OFFSET)
-    val fqNamePtr = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_PACKAGE_NAME_PRT_OFFSET)
-    val simpleNameLength = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_SIMPLE_NAME_LENGTH_OFFSET)
-    val simpleNameId = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_SIMPLE_NAME_ID_OFFSET)
-    val simpleNamePtr = wasm_i32_load(typeInfoPtr + TYPE_INFO_TYPE_SIMPLE_NAME_PRT_OFFSET)
-    val packageName = stringLiteral(fqNameId, fqNamePtr, fqNameLength)
-    val simpleName = stringLiteral(simpleNameId, simpleNamePtr, simpleNameLength)
+    val packageName = getPackageName(typeInfoPtr)
+    val simpleName = getSimpleName(typeInfoPtr)
     return TypeInfoData(typeInfoPtr, packageName, simpleName)
 }
 
+internal fun getSimpleName(typeInfoPtr: Int) = getString(
+    typeInfoPtr,
+    TYPE_INFO_TYPE_SIMPLE_NAME_LENGTH_OFFSET,
+    TYPE_INFO_TYPE_SIMPLE_NAME_ID_OFFSET,
+    TYPE_INFO_TYPE_SIMPLE_NAME_PRT_OFFSET
+)
+
+internal fun getPackageName(typeInfoPtr: Int) = getString(
+    typeInfoPtr,
+    TYPE_INFO_TYPE_PACKAGE_NAME_LENGTH_OFFSET,
+    TYPE_INFO_TYPE_PACKAGE_NAME_ID_OFFSET,
+    TYPE_INFO_TYPE_PACKAGE_NAME_PRT_OFFSET
+)
+
+private fun getString(typeInfoPtr: Int, lengthOffset: Int, idOffset: Int, ptrOffset: Int): String {
+    val length = wasm_i32_load(typeInfoPtr + lengthOffset)
+    val id = wasm_i32_load(typeInfoPtr + idOffset)
+    val ptr = wasm_i32_load(typeInfoPtr + ptrOffset)
+    return stringLiteral(id, ptr, length)
+}
+
 internal fun getSuperTypeId(typeInfoPtr: Int): Int =
     wasm_i32_load(typeInfoPtr + TYPE_INFO_SUPER_TYPE_OFFSET)