8166948: Exploded image too slow to be usable

Reviewed-by: alanb, mchung, ihse

jdk/make/CompileModuleTools.gmk

@@ -0,0 +1,42 @@
+#
+# Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
+# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+#
+# This code is free software; you can redistribute it and/or modify it
+# under the terms of the GNU General Public License version 2 only, as
+# published by the Free Software Foundation.  Oracle designates this
+# particular file as subject to the "Classpath" exception as provided
+# by Oracle in the LICENSE file that accompanied this code.
+#
+# This code is distributed in the hope that it will be useful, but WITHOUT
+# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+# version 2 for more details (a copy is included in the LICENSE file that
+# accompanied this code).
+#
+# You should have received a copy of the GNU General Public License version
+# 2 along with this work; if not, write to the Free Software Foundation,
+# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+# or visit www.oracle.com if you need additional information or have any
+# questions.
+#
+
+include $(SPEC)
+include MakeBase.gmk
+include JavaCompilation.gmk
+include SetupJavaCompilers.gmk
+
+TOOLS_CLASSES_DIR := $(BUILDTOOLS_OUTPUTDIR)/tools_jigsaw_classes
+
+$(eval $(call SetupJavaCompilation,BUILD_JIGSAW_TOOLS, \
+    SETUP := GENERATE_USINGJDKBYTECODE, \
+    SRC := $(JDK_TOPDIR)/make/src/classes, \
+    INCLUDES := build/tools/deps \
+                build/tools/jigsaw, \
+    BIN := $(TOOLS_CLASSES_DIR), \
+    ADD_JAVAC_FLAGS := \
+        --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED \
+        --add-exports java.base/jdk.internal.module=ALL-UNNAMED \
+))

jdk/make/ModuleTools.gmk

@@ -1,5 +1,5 @@
 #
-# Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
+# Copyright (c) 2013, 2016, Oracle and/or its affiliates. All rights reserved.
 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 #
 # This code is free software; you can redistribute it and/or modify it
@@ -26,18 +26,14 @@
 include $(SPEC)
 include MakeBase.gmk
 include JavaCompilation.gmk
-include SetupJavaCompilers.gmk
 
 TOOLS_CLASSES_DIR := $(BUILDTOOLS_OUTPUTDIR)/tools_jigsaw_classes
 
-$(eval $(call SetupJavaCompilation,BUILD_JIGSAW_TOOLS, \
+# To avoid reevaluating the compilation setup for the tools each time this file
-    SETUP := GENERATE_USINGJDKBYTECODE, \
+# is included, the actual compilation is handled by CompileModuleTools.gmk. The
-    SRC := $(JDK_TOPDIR)/make/src/classes, \
+# following trick is used to be able to declare a dependency on the built tools.
-    INCLUDES := build/tools/deps \
+BUILD_TOOLS_JDK := $(call SetupJavaCompilationCompileTarget, \
-                build/tools/jigsaw, \
+    BUILD_JIGSAW_TOOLS, $(TOOLS_CLASSES_DIR))
-    BIN := $(TOOLS_CLASSES_DIR), \
-    ADD_JAVAC_FLAGS := --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED ))
-
 
 TOOL_GENGRAPHS := $(BUILD_JAVA) -esa -ea -cp $(TOOLS_CLASSES_DIR) \
     build.tools.jigsaw.GenGraphs
@@ -45,3 +41,8 @@ TOOL_GENGRAPHS := $(BUILD_JAVA) -esa -ea -cp $(TOOLS_CLASSES_DIR) \
 TOOL_MODULESUMMARY := $(BUILD_JAVA) -esa -ea -cp $(TOOLS_CLASSES_DIR) \
     --add-exports jdk.jdeps/com.sun.tools.classfile=ALL-UNNAMED \
     build.tools.jigsaw.ModuleSummary
+
+TOOL_ADD_PACKAGES_ATTRIBUTE := $(BUILD_JAVA) $(JAVA_FLAGS_SMALL) \
+    -cp $(TOOLS_CLASSES_DIR) \
+    --add-exports java.base/jdk.internal.module=ALL-UNNAMED \
+    build.tools.jigsaw.AddPackagesAttribute

jdk/make/src/classes/build/tools/jigsaw/AddPackagesAttribute.java

@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+package build.tools.jigsaw;
+
+import java.io.ByteArrayOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.lang.module.ModuleFinder;
+import java.lang.module.ModuleReference;
+import java.nio.file.DirectoryStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Optional;
+import java.util.Set;
+
+import jdk.internal.module.ModuleInfoExtender;
+
+/**
+ * Adds the Packages class file attribute to each module-info.class in an
+ * exploded build.
+ */
+
+public class AddPackagesAttribute {
+
+    public static void main(String[] args) throws IOException {
+
+        if (args.length != 1) {
+            System.err.println("Usage AddPackagesAttribute exploded-java-home");
+            System.exit(-1);
+        }
+
+        String home = args[0];
+        Path dir = Paths.get(home, "modules");
+
+        ModuleFinder finder = ModuleFinder.of(dir);
+
+        try (DirectoryStream<Path> stream = Files.newDirectoryStream(dir)) {
+            for (Path entry : stream) {
+                Path mi = entry.resolve("module-info.class");
+                if (Files.isRegularFile(mi)) {
+                    String mn = entry.getFileName().toString();
+                    Optional<ModuleReference> omref = finder.find(mn);
+                    if (omref.isPresent()) {
+                        Set<String> packages = omref.get().descriptor().conceals();
+                        addPackagesAttribute(mi, packages);
+                    }
+                }
+            }
+        }
+    }
+
+    static void addPackagesAttribute(Path mi, Set<String> packages) throws IOException {
+        byte[] bytes;
+        try (InputStream in = Files.newInputStream(mi)) {
+            ModuleInfoExtender extender = ModuleInfoExtender.newExtender(in);
+            extender.conceals(packages);
+            ByteArrayOutputStream baos = new ByteArrayOutputStream();
+            extender.write(baos);
+            bytes = baos.toByteArray();
+        }
+
+        Files.write(mi, bytes);
+    }
+
+}