backend.native: improve memory management using mem scopes

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/native/llvm/CodeGenerator.kt

@@ -66,9 +66,11 @@ internal class CodeGenerator(override val context:Context) : ContextUtils {
     fun load(value:LLVMOpaqueValue, varName: String):LLVMOpaqueValue = LLVMBuildLoad(context.llvmBuilder, value, varName)!!
     fun store(value:LLVMOpaqueValue, ptr:LLVMOpaqueValue):LLVMOpaqueValue = LLVMBuildStore(context.llvmBuilder, value, ptr)!!
     fun call(descriptor: FunctionDescriptor, args: MutableList<LLVMOpaqueValue?>, result: String): LLVMOpaqueValue? {
-        val rargs = malloc(array[args.size](Ref to LLVMOpaqueValue))
-        args.forEachIndexed { i, llvmOpaqueValue ->  rargs[i].value = args[i]}
-        return LLVMBuildCall(context.llvmBuilder, descriptor.llvmFunction.getLlvmValue(), rargs[0], args.size, result)
+        memScoped {
+            val rargs = alloc(array[args.size](Ref to LLVMOpaqueValue))
+            args.forEachIndexed { i, llvmOpaqueValue -> rargs[i].value = args[i] }
+            return LLVMBuildCall(context.llvmBuilder, descriptor.llvmFunction.getLlvmValue(), rargs[0], args.size, result)
+        }
     }
 }
 

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/native/llvm/ContextUtils.kt

@@ -107,9 +107,12 @@ internal interface ContextUtils {
      */
     private fun getPtrToFirstElem(arrayPtr: CompileTimeValue): CompileTimeValue {
         val indices = longArrayOf(0, 0).map { LLVMConstInt(LLVMInt32Type(), it, 0) }.toTypedArray()
-        val indicesNativeArrayPtr = mallocNativeArrayOf(LLVMOpaqueValue, *indices)[0] // TODO: dispose
 
-        return compileTimeValue(LLVMConstGEP(arrayPtr.getLlvmValue(), indicesNativeArrayPtr, indices.size))
+        memScoped {
+            val indicesNativeArrayPtr = allocNativeArrayOf(LLVMOpaqueValue, *indices)[0]
+
+            return compileTimeValue(LLVMConstGEP(arrayPtr.getLlvmValue(), indicesNativeArrayPtr, indices.size))
+        }
     }
 
     /**

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/native/llvm/LlvmUtils.kt

@@ -1,8 +1,6 @@
 package org.jetbrains.kotlin.backend.native.llvm
 
-import kotlin_native.interop.Int8Box
-import kotlin_native.interop.NativeArray
-import kotlin_native.interop.mallocNativeArrayOf
+import kotlin_native.interop.*
 import llvm.*
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.utils.singletonOrEmptyList
@@ -24,9 +22,12 @@ internal class ConstArray(val elemType: LLVMOpaqueType?, val elements: List<Comp
 
     override fun getLlvmValue(): LLVMOpaqueValue? {
         val values = elements.map { it.getLlvmValue() }.toTypedArray()
-        val valuesNativeArrayPtr = mallocNativeArrayOf(LLVMOpaqueValue, *values)[0] // FIXME: dispose
 
-        return LLVMConstArray(elemType, valuesNativeArrayPtr, values.size)
+        memScoped {
+            val valuesNativeArrayPtr = allocNativeArrayOf(LLVMOpaqueValue, *values)[0]
+
+            return LLVMConstArray(elemType, valuesNativeArrayPtr, values.size)
+        }
     }
 }
 
@@ -36,8 +37,10 @@ internal open class Struct(val type: LLVMOpaqueType?, val elements: List<Compile
 
     override fun getLlvmValue(): LLVMOpaqueValue? {
         val values = elements.map { it.getLlvmValue() }.toTypedArray()
-        val valuesNativeArrayPtr = mallocNativeArrayOf(LLVMOpaqueValue, *values)[0] // FIXME: dispose
-        return LLVMConstNamedStruct(type, valuesNativeArrayPtr, values.size)
+        memScoped {
+            val valuesNativeArrayPtr = allocNativeArrayOf(LLVMOpaqueValue, *values)[0]
+            return LLVMConstNamedStruct(type, valuesNativeArrayPtr, values.size)
+        }
     }
 }
 
@@ -74,8 +77,11 @@ internal fun getLlvmFunctionType(function: FunctionDescriptor): LLVMOpaqueType?
 
     val paramTypes = params.map { getLLVMType(it.type) }.toTypedArray()
     if (paramTypes.size == 0) return LLVMFunctionType(returnType, null, 0, 0)
-    val paramTypesPtr = mallocNativeArrayOf(LLVMOpaqueType, *paramTypes)[0] // TODO: dispose
-    return LLVMFunctionType(returnType, paramTypesPtr, paramTypes.size, 0)
+
+    memScoped {
+        val paramTypesPtr = allocNativeArrayOf(LLVMOpaqueType, *paramTypes)[0]
+        return LLVMFunctionType(returnType, paramTypesPtr, paramTypes.size, 0)
+    }
 }
 
 /**

backend.native/compiler/ir/backend.native/src/org/jetbrains/kotlin/backend/native/llvm/RTTIGenerator.kt

@@ -1,7 +1,8 @@
 package org.jetbrains.kotlin.backend.native.llvm
 
 
-import kotlin_native.interop.mallocNativeArrayOf
+import kotlin_native.interop.allocNativeArrayOf
+import kotlin_native.interop.memScoped
 import llvm.*
 import org.jetbrains.kotlin.backend.native.implementation
 import org.jetbrains.kotlin.backend.native.implementedInterfaces
@@ -59,13 +60,16 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
     private fun createStructFor(className: FqName, fields: List<PropertyDescriptor>): LLVMOpaqueType? {
         val classType = LLVMStructCreateNamed(LLVMGetModuleContext(context.llvmModule), "kclass:" + className)
         val fieldTypes = fields.map { getLLVMType(it.returnType!!) }.toTypedArray()
-        val fieldTypesNativeArrayPtr = if (fieldTypes.size > 0) {
-            mallocNativeArrayOf(LLVMOpaqueType, *fieldTypes)[0] // TODO: dispose
-        } else {
-            null
-        }
 
-        LLVMStructSetBody(classType, fieldTypesNativeArrayPtr, fieldTypes.size, 0)
+        memScoped {
+            val fieldTypesNativeArrayPtr = if (fieldTypes.size > 0) {
+                allocNativeArrayOf(LLVMOpaqueType, *fieldTypes)[0]
+            } else {
+                null
+            }
+
+            LLVMStructSetBody(classType, fieldTypesNativeArrayPtr, fieldTypes.size, 0)
+        }
         return classType
     }