backend.native: use common/hash to compute hashes for RTTI

Interop/Runtime/src/main/kotlin/kotlin_native/interop/Utils.kt

@@ -2,15 +2,6 @@ package kotlin_native.interop
 
 fun <T : NativeRef> malloc(type: NativeRef.TypeWithSize<T>) = type.byPtr(bridge.malloc(type.size))
 
-inline fun <T : NativeRef, R> malloc(type: NativeRef.TypeWithSize<T>, action: (T) -> R): R {
-    val ref = malloc(type)
-    try {
-        return action(ref)
-    } finally {
-        free(ref)
-    }
-}
-
 fun free(ptr: NativePtr?) {
     if (ptr != null) {
         bridge.free(ptr)
@@ -29,6 +20,14 @@ fun <T : NativeRef> Placement.allocNativeArrayOf(elemType: NativeRef.Type<T>, va
 
 fun <T : NativeRef> mallocNativeArrayOf(elemType: NativeRef.Type<T>, vararg elements: T?) = heap.allocNativeArrayOf(elemType, *elements)
 
+fun Placement.allocNativeArrayOf(elements: ByteArray): NativeArray<Int8Box> {
+    val res = this.alloc(array[elements.size](Int8Box))
+    elements.forEachIndexed { i, element ->
+        res[i].value = element
+    }
+    return res
+}
+
 fun CString.Companion.fromString(str: String?): CString? {
     if (str == null) {
         return null

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

@@ -1,11 +1,14 @@
 package org.jetbrains.kotlin.backend.native.llvm
 
-import kotlin_native.interop.mallocNativeArrayOf
+import kotlin_native.interop.*
 import llvm.*
+import org.jetbrains.kotlin.backend.native.hash.GlobalHash
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
 import org.jetbrains.kotlin.descriptors.PropertyDescriptor
 import org.jetbrains.kotlin.ir.declarations.IrProperty
+import org.jetbrains.kotlin.name.FqName
+import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.descriptorUtil.classId
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
 import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
@@ -16,6 +19,12 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassNotAny
 internal interface ContextUtils {
     val context: Context
 
+    val runtime: Runtime
+        get() = context.runtime
+
+    val llvmTargetData: LLVMOpaqueTargetData?
+        get() = runtime.targetData
+
     /**
      * All fields of the class instance.
      * The order respects the class hierarchy, i.e. a class [fields] contains superclass [fields] as a prefix.
@@ -73,7 +82,7 @@ internal interface ContextUtils {
             val module = context.llvmModule
             val globalName = this.typeInfoSymbolName
             val globalPtr = LLVMGetNamedGlobal(module, globalName) ?:
-                            LLVMAddGlobal(module, context.runtime.typeInfoType, globalName)
+                            LLVMAddGlobal(module, runtime.typeInfoType, globalName)
 
             return compileTimeValue(globalPtr)
         }
@@ -114,4 +123,43 @@ internal interface ContextUtils {
             Zero(pointerType(elemType))
         }
     }
+
+    /**
+     * Converts this [GlobalHash] to compile-time value of [runtime]-defined `GlobalHash` type.
+     *
+     * These types must be defined identically.
+     */
+    private fun GlobalHash.asCompileTimeValue(): Struct {
+        val size = GlobalHash.size
+        assert(size.toLong() == LLVMStoreSizeOfType(llvmTargetData, runtime.globalhHashType))
+
+        return Struct(runtime.globalhHashType, bits.asCompileTimeValue(size))
+        // TODO: implement such transformation more generally using LLVM bitcast
+        // (seems to require some investigation)
+    }
+
+    /**
+     * Converts this string to the sequence of bytes to be used for hashing/storing to binary/etc.
+     *
+     * TODO: share this implementation
+     */
+    private fun stringAsBytes(str: String) = str.toByteArray(Charsets.UTF_8)
+
+    val String.localHash: LocalHash
+        get() = LocalHash(localHash(stringAsBytes(this)))
+
+    val String.globalHash: CompileTimeValue
+        get() = memScoped {
+            val hash = globalHash(stringAsBytes(this@globalHash), memScope)
+            hash.asCompileTimeValue()
+        }
+
+    val FqName.globalHash: CompileTimeValue
+        get() = this.toString().globalHash
+
+    val Name.localHash: LocalHash
+        get() = this.toString().localHash
+
+    val FqName.localHash: LocalHash
+        get() = this.toString().localHash
 }

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

@@ -0,0 +1,24 @@
+package org.jetbrains.kotlin.backend.native.llvm
+
+import kotlin_native.interop.*
+import org.jetbrains.kotlin.backend.native.hash.*
+
+internal fun localHash(data: ByteArray): Long {
+    memScoped {
+        val hashBox = alloc(Int64Box)
+        val bytes = allocNativeArrayOf(data)
+        MakeLocalHash(bytes.ptr, data.size, hashBox)
+        return hashBox.value
+    }
+}
+
+internal fun globalHash(data: ByteArray, retValPlacement: Placement): GlobalHash {
+    val res = retValPlacement.alloc(GlobalHash)
+    memScoped {
+        val bytes = allocNativeArrayOf(data)
+        MakeGlobalHash(bytes.ptr, data.size, res)
+    }
+    return res
+}
+
+internal class LocalHash(val value: Long) : CompileTimeValue by Int64(value)

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

@@ -1,5 +1,7 @@
 package org.jetbrains.kotlin.backend.native.llvm
 
+import kotlin_native.interop.Int8Box
+import kotlin_native.interop.NativeArray
 import kotlin_native.interop.mallocNativeArrayOf
 import llvm.*
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
@@ -75,3 +77,12 @@ internal fun getLlvmFunctionType(function: FunctionDescriptor): LLVMOpaqueType?
     val paramTypesPtr = mallocNativeArrayOf(LLVMOpaqueType, *paramTypes)[0] // TODO: dispose
     return LLVMFunctionType(returnType, paramTypesPtr, paramTypes.size, 0)
 }
+
+/**
+ * Represents [size] bytes contained in this array as [ConstArray].
+ */
+internal fun NativeArray<Int8Box>.asCompileTimeValue(size: Int): ConstArray {
+    return ConstArray(int8Type, (0 .. size-1).map {
+        Int8(this[it].value)
+    })
+}

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

@@ -2,25 +2,7 @@ package org.jetbrains.kotlin.backend.native.llvm
 
 import org.jetbrains.kotlin.descriptors.ClassDescriptor
 import org.jetbrains.kotlin.descriptors.FunctionDescriptor
-import org.jetbrains.kotlin.name.FqName
-import org.jetbrains.kotlin.name.Name
 import org.jetbrains.kotlin.resolve.descriptorUtil.fqNameSafe
-import java.util.zip.CRC32
-
-private fun crc32(str: String): Long {
-    val c = CRC32()
-    c.update(str.toByteArray())
-    return c.value
-}
-
-internal val String.nameHash: Long
-    get() = crc32(this)
-
-internal val Name.nameHash: Long
-    get() = this.toString().nameHash
-
-internal val FqName.nameHash: Long
-    get() = this.toString().nameHash
 
 internal val FunctionDescriptor.symbolName: String
     get() = "kfun:" + this.fqNameSafe.toString() // FIXME: add signature

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

@@ -15,17 +15,13 @@ import org.jetbrains.kotlin.resolve.descriptorUtil.getSuperClassOrAny
 
 internal class RTTIGenerator(override val context: Context) : ContextUtils {
 
-    val runtime: Runtime
-        get() = context.runtime
+    private inner class FieldTableRecord(val nameSignature: LocalHash, val fieldOffset: Int) :
+            Struct(runtime.fieldTableRecordType, nameSignature, Int32(fieldOffset))
 
+    private inner class MethodTableRecord(val nameSignature: LocalHash, val methodEntryPoint: CompileTimeValue) :
+            Struct(runtime.methodTableRecordType, nameSignature, methodEntryPoint)
 
-    private inner class FieldTableRecord(val nameSignature: Long, val fieldOffset: Int) :
-            Struct(runtime.fieldTableRecordType, Int64(nameSignature), Int32(fieldOffset))
-
-    private inner class MethodTableRecord(val nameSignature: Long, val methodEntryPoint: CompileTimeValue) :
-            Struct(runtime.methodTableRecordType, Int64(nameSignature), methodEntryPoint)
-
-    private inner class TypeInfo(val name: Long, val size: Int,
+    private inner class TypeInfo(val name: CompileTimeValue, val size: Int,
                                  val superType: CompileTimeValue,
                                  val objOffsets: CompileTimeValue,
                                  val objOffsetsCount: Int,
@@ -39,7 +35,7 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
             Struct(
                     runtime.typeInfoType,
 
-                    Struct(runtime.globalhHashType, ConstArray(LLVMInt8Type(), Array(20, {i -> Int8(1)}).toList())),
+                    name,
                     Int32(size),
 
                     superType,
@@ -122,7 +118,7 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
 
         val classType = createStructFor(className, classDesc.fields)
 
-        val name = className.nameHash
+        val name = className.globalHash
 
         val size = LLVMStoreSizeOfType(runtime.targetData, classType).toInt()
 
@@ -145,10 +141,10 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
 
         val fields = classDesc.fields.mapIndexed { index, field ->
             // Note: using FQ name because a class may have multiple fields with the same name due to property overriding
-            val nameSignature = field.fqNameSafe.nameHash // FIXME: add signature
+            val nameSignature = field.fqNameSafe.localHash // FIXME: add signature
             val fieldOffset = LLVMOffsetOfElement(runtime.targetData, classType, index)
             FieldTableRecord(nameSignature, fieldOffset.toInt())
-        }.sortedBy { it.nameSignature }
+        }.sortedBy { it.nameSignature.value }
 
         val fieldsPtr = addGlobalConstArray("kfields:$className", runtime.fieldTableRecordType, fields)
 
@@ -157,11 +153,11 @@ internal class RTTIGenerator(override val context: Context) : ContextUtils {
         val vtablePtr = addGlobalConstArray("kvtable:$className", pointerType(int8Type), vtable)
 
         val methods = getMethodTableEntries(classDesc).map {
-            val nameSignature = it.name.nameHash // FIXME: add signature
+            val nameSignature = it.name.localHash // FIXME: add signature
             // TODO: compile-time resolution limits binary compatibility
             val methodEntryPoint = it.implementation.entryPointAddress
             MethodTableRecord(nameSignature, methodEntryPoint)
-        }.sortedBy { it.nameSignature }
+        }.sortedBy { it.nameSignature.value }
 
         val methodsPtr = addGlobalConstArray("kmethods:$className", runtime.methodTableRecordType, methods)