[WASM] Add text section to implement debug info

wasm/wasm.ir/src/org/jetbrains/kotlin/wasm/ir/convertors/WasmIrToBinary.kt

@@ -11,7 +11,7 @@ import org.jetbrains.kotlin.wasm.ir.*
 import java.io.ByteArrayOutputStream
 import java.io.OutputStream
 
-class WasmIrToBinary(outputStream: OutputStream, val module: WasmModule) {
+class WasmIrToBinary(outputStream: OutputStream, val module: WasmModule, val moduleName: String, val emitNameSection: Boolean) {
     var b: ByteWriter = ByteWriter.OutputStream(outputStream)
 
     fun appendWasmModule() {
@@ -109,6 +109,38 @@ class WasmIrToBinary(outputStream: OutputStream, val module: WasmModule) {
                 appendVectorSize(data.size)
                 data.forEach { appendData(it) }
             }
+
+            //text section (should be placed after data)
+            if (emitNameSection) {
+                appendTextSection(definedFunctions)
+            }
+        }
+    }
+
+    private fun appendTextSection(definedFunctions: List<WasmFunction.Defined>) {
+        appendSection(0u) {
+            b.writeString("name")
+            appendSection(0u) {
+                b.writeString(moduleName)
+            }
+            appendSection(1u) {
+                appendVectorSize(definedFunctions.size)
+                definedFunctions.forEach {
+                    appendModuleFieldReference(it)
+                    b.writeString(it.name)
+                }
+            }
+            appendSection(2u) {
+                appendVectorSize(definedFunctions.size)
+                definedFunctions.forEach {
+                    appendModuleFieldReference(it)
+                    appendVectorSize(it.locals.size)
+                    it.locals.forEach { local ->
+                        b.writeVarUInt32(local.id)
+                        b.writeString(local.name)
+                    }
+                }
+            }
         }
     }
 

wasm/wasm.ir/test/org/jetbrains/kotlin/wasm/ir/SpecTestRunner.kt

@@ -228,7 +228,7 @@ fun testWasmFile(wasmFile: File, dirName: String) {
 
 fun WasmModule.toBinaryFormat(): ByteArray {
     val os = ByteArrayOutputStream()
-    WasmIrToBinary(os, this).appendWasmModule()
+    WasmIrToBinary(os, this, "<WASM_TESTS>", emitNameSection = false).appendWasmModule()
     return os.toByteArray()
 }