KT-3267 Put binary format version into the generated class files

#KT-3267 Fixed

compiler/backend/src/org/jetbrains/jet/codegen/ImplementationBodyCodegen.java

@@ -43,10 +43,7 @@ import org.jetbrains.jet.lang.resolve.DescriptorUtils;
 import org.jetbrains.jet.lang.resolve.OverridingUtil;
 import org.jetbrains.jet.lang.resolve.calls.model.ResolvedCall;
 import org.jetbrains.jet.lang.resolve.constants.CompileTimeConstant;
-import org.jetbrains.jet.lang.resolve.java.AsmTypeConstants;
+import org.jetbrains.jet.lang.resolve.java.*;
-import org.jetbrains.jet.lang.resolve.java.JvmAbi;
-import org.jetbrains.jet.lang.resolve.java.JvmClassName;
-import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
 import org.jetbrains.jet.lang.resolve.java.kt.DescriptorKindUtils;
 import org.jetbrains.jet.lang.resolve.name.Name;
 import org.jetbrains.jet.lang.types.JetType;
@@ -242,6 +239,7 @@ public class ImplementationBodyCodegen extends ClassBodyCodegen {
             if (JvmStdlibNames.FLAGS_DEFAULT_VALUE != flags) {
                 annotationVisitor.visit(JvmStdlibNames.JET_FLAGS_FIELD, flags);
             }
+            annotationVisitor.visit(JvmStdlibNames.ABI_VERSION_NAME, JvmAbi.VERSION);
             annotationVisitor.visitEnd();
         }
     }

compiler/backend/src/org/jetbrains/jet/codegen/NamespaceCodegen.java

@@ -22,6 +22,7 @@ import com.intellij.openapi.util.io.FileUtil;
 import com.intellij.openapi.vfs.VirtualFile;
 import com.intellij.psi.PsiFile;
 import org.jetbrains.annotations.NotNull;
+import org.jetbrains.asm4.AnnotationVisitor;
 import org.jetbrains.asm4.MethodVisitor;
 import org.jetbrains.asm4.Type;
 import org.jetbrains.asm4.commons.InstructionAdapter;
@@ -33,9 +34,7 @@ import org.jetbrains.jet.lang.descriptors.PropertyDescriptor;
 import org.jetbrains.jet.lang.diagnostics.DiagnosticUtils;
 import org.jetbrains.jet.lang.psi.*;
 import org.jetbrains.jet.lang.resolve.BindingContext;
-import org.jetbrains.jet.lang.resolve.java.JvmClassName;
+import org.jetbrains.jet.lang.resolve.java.*;
-import org.jetbrains.jet.lang.resolve.java.JvmStdlibNames;
-import org.jetbrains.jet.lang.resolve.java.PackageClassUtils;
 import org.jetbrains.jet.lang.resolve.name.FqName;
 import org.jetbrains.jet.lang.resolve.name.Name;
 
@@ -86,7 +85,9 @@ public class NamespaceCodegen extends MemberCodegen {
         boolean multiFile = CodegenBinding.isMultiFileNamespace(state.getBindingContext(), name);
 
         if (shouldGenerateNSClass(files)) {
-            v.getClassBuilder().newAnnotation(JvmStdlibNames.JET_PACKAGE_CLASS.getDescriptor(), true);
+            AnnotationVisitor packageClassAnnotation = v.getClassBuilder().newAnnotation(JvmStdlibNames.JET_PACKAGE_CLASS.getDescriptor(), true);
+            packageClassAnnotation.visit(JvmStdlibNames.ABI_VERSION_NAME, JvmAbi.VERSION);
+            packageClassAnnotation.visitEnd();
         }
 
         for (JetFile file : files) {

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JvmAbi.java

@@ -17,6 +17,12 @@
 package org.jetbrains.jet.lang.resolve.java;
 
 public class JvmAbi {
+    /**
+     * This constant is used to identify binary format (class file) versions
+     * If you change class file metadata format and/or naming conventions, please increase this number
+     */
+    public static final int VERSION = 0;
+
     public static final String TRAIT_IMPL_CLASS_NAME = "$TImpl";
     public static final String TRAIT_IMPL_SUFFIX = "$" + TRAIT_IMPL_CLASS_NAME;
 

compiler/frontend.java/src/org/jetbrains/jet/lang/resolve/java/JvmStdlibNames.java

@@ -71,6 +71,8 @@ public class JvmStdlibNames {
 
     public static final JvmClassName JET_PACKAGE_CLASS = JvmClassName.byFqNameWithoutInnerClasses("jet.runtime.typeinfo.JetPackageClass");
 
+    public static final String ABI_VERSION_NAME = "abiVersion";
+
     public static final String JET_CLASS_SIGNATURE = "signature";
 
 

runtime/src/jet/runtime/typeinfo/JetClass.java

@@ -31,4 +31,6 @@ public @interface JetClass {
      * @return flags for class
      */
     int flags() default 0;
+
+    int abiVersion();
 }

runtime/src/jet/runtime/typeinfo/JetPackageClass.java

@@ -24,4 +24,5 @@ import java.lang.annotation.RetentionPolicy;
  */
 @Retention(RetentionPolicy.RUNTIME)
 public @interface JetPackageClass {
+    int abiVersion();
 }