--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/jdk/src/java.base/share/native/libjimage/jimage.cpp Fri Sep 04 10:11:43 2015 -0300
@@ -0,0 +1,194 @@
+/*
+ * Copyright (c) 2014, 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.
+ *
+ * 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 <string.h>
+
+#include "jimage.hpp"
+
+#include "imageFile.hpp"
+
+#define BOOT_VERSION "9.0"
+
+/*
+ * JImageOpen - Given the supplied full path file name, open an image file. This
+ * function will also initialize tables and retrieve meta-data necessary to
+ * satisfy other functions in the API. If the image file has been previously
+ * open, a new open request will share memory and resources used by the previous
+ * open. A call to JImageOpen should be balanced by a call to JImageClose, to
+ * release memory and resources used. If the image file is not found or cannot
+ * be open, then NULL is returned and error will contain a reason for the
+ * failure; a positive value for a system error number, negative for a jimage
+ * specific error (see JImage Error Codes.)
+ *
+ * Ex.
+ * jint error;
+ * JImageFile* jimage = (*JImageOpen)(JAVA_HOME "lib/modules/bootmodules.jimage", &error);
+ * if (image == NULL) {
+ * tty->print_cr("JImage failed to open: %d", error);
+ * ...
+ * }
+ * ...
+ */
+extern "C" JImageFile* JIMAGE_Open(const char *name, jint* error) {
+ // TODO - return a meaningful error code
+ *error = 0;
+ ImageFileReader* jfile = ImageFileReader::open(name);
+ return (JImageFile*) jfile;
+}
+
+/*
+ * JImageClose - Given the supplied open image file (see JImageOpen), release
+ * memory and resources used by the open file and close the file. If the image
+ * file is shared by other uses, release and close is deferred until the last use
+ * is also closed.
+ *
+ * Ex.
+ * (*JImageClose)(image);
+ */
+extern "C" void JIMAGE_Close(JImageFile* image) {
+ ImageFileReader::close((ImageFileReader*) image);
+}
+
+/*
+ * JImagePackageToModule - Given an open image file (see JImageOpen) and the name
+ * of a package, return the name of module where the package resides. If the
+ * package does not exist in the image file, the function returns NULL.
+ * The resulting string does/should not have to be released. All strings are
+ * utf-8, zero byte terminated.
+ *
+ * Ex.
+ * const char* package = (*JImagePackageToModule)(image, "java/lang");
+ * tty->print_cr(package);
+ * —> java.base
+ */
+extern "C" const char* JIMAGE_PackageToModule(JImageFile* image, const char* package_name) {
+ return ((ImageFileReader*) image)->get_image_module_data()->package_to_module(package_name);
+}
+
+/*
+ * JImageFindResource - Given an open image file (see JImageOpen), a module
+ * name, a version string and the name of a class/resource, return location
+ * information describing the resource and its size. If no resource is found, the
+ * function returns JIMAGE_NOT_FOUND and the value of size is undefined.
+ * The version number should be "9.0" and is not used in locating the resource.
+ * The resulting location does/should not have to be released.
+ * All strings are utf-8, zero byte terminated.
+ *
+ * Ex.
+ * jlong size;
+ * JImageLocationRef location = (*JImageFindResource)(image, "java.base", "9.0", "java/lang/String.class", &size);
+ */
+extern "C" JImageLocationRef JIMAGE_FindResource(JImageFile* image,
+ const char* module_name, const char* version, const char* name,
+ jlong* size) {
+ if (strcmp(version, BOOT_VERSION) != 0) {
+ return (JImageLocationRef) 0;
+ }
+
+ ImageLocation location;
+ char fullpath[IMAGE_MAX_PATH];
+
+ // Concatenate to get full path
+ strncpy(fullpath, "/", IMAGE_MAX_PATH - 1);
+ strncat(fullpath, module_name, IMAGE_MAX_PATH - 1);
+ strncat(fullpath, "/", IMAGE_MAX_PATH - 1);
+ strncat(fullpath, name, IMAGE_MAX_PATH - 1);
+ JImageLocationRef loc =
+ (JImageLocationRef) ((ImageFileReader*) image)->find_location_index(fullpath, (u8*) size);
+ return loc;
+}
+
+/*
+ * JImageGetResource - Given an open image file (see JImageOpen), a resource’s
+ * location information (see JImageFindResource), a buffer of appropriate
+ * size and the size, retrieve the bytes associated with the
+ * resource. If the size is less than the resource size then the read is truncated.
+ * If the size is greater than the resource size then the remainder of the buffer
+ * is zero filled. The function will return the actual size of the resource.
+ *
+ * Ex.
+ * jlong size;
+ * JImageLocationRef* location = (*JImageFindResource)(image, "java.base", "9.0", "java/lang/String.class", &size);
+ * char* buffer = new char[size];
+ * (*JImageGetResource)(image, location, buffer, size);
+ */
+extern "C" jlong JIMAGE_GetResource(JImageFile* image, JImageLocationRef location,
+ char* buffer, jlong size) {
+ ((ImageFileReader*) image)->get_resource((u4) location, (u1*) buffer);
+ return size;
+}
+
+/*
+ * JImageResourceIterator - Given an open image file (see JImageOpen), a visitor
+ * function and a visitor argument, iterator through each of the image's resources.
+ * The visitor function is called with the image file, the module name, the
+ * package name, the base name, the extension and the visitor argument. The return
+ * value of the visitor function should be true, unless an early iteration exit is
+ * required. All strings are utf-8, zero byte terminated.file.
+ *
+ * Ex.
+ * bool ctw_visitor(JImageFile* jimage, const char* module_name, const char* version, const char* package, const char* name, const char* extension, void* arg) {
+ * if (strcmp(extension, “class”) == 0) {
+ * char path[JIMAGE_MAX_PATH];
+ * Thread* THREAD = Thread::current();
+ * jio_snprintf(path, JIMAGE_MAX_PATH - 1, "/%s/%s", package, name);
+ * ClassLoader::compile_the_world_in(path, (Handle)arg, THREAD);
+ * return !HAS_PENDING_EXCEPTION;
+ * }
+ * return true;
+ * }
+ * (*JImageResourceIterator)(image, ctw_visitor, loader);
+ */
+extern "C" void JIMAGE_ResourceIterator(JImageFile* image,
+ JImageResourceVisitor_t visitor, void* arg) {
+ ImageFileReader* imageFile = (ImageFileReader*) image;
+ u4 nEntries = imageFile->table_length();
+ const ImageStrings strings = imageFile->get_strings();
+ for (u4 i = 0; i < nEntries; i++) {
+ ImageLocation location(imageFile->get_location_data(i));
+
+ u4 moduleOffset = (u4) location.get_attribute(ImageLocation::ATTRIBUTE_MODULE);
+ if (moduleOffset == 0) {
+ continue; // skip non-modules
+ }
+ const char *module = strings.get(moduleOffset);
+ if (strcmp(module, "modules") == 0
+ || strcmp(module, "packages") == 0) {
+ continue; // always skip
+ }
+
+ u4 parentOffset = (u4) location.get_attribute(ImageLocation::ATTRIBUTE_PARENT);
+ const char *parent = strings.get(parentOffset);
+ u4 baseOffset = (u4) location.get_attribute(ImageLocation::ATTRIBUTE_BASE);
+ const char *base = strings.get(baseOffset);
+ u4 extOffset = (u4) location.get_attribute(ImageLocation::ATTRIBUTE_EXTENSION);
+ const char *extension = strings.get(extOffset);
+
+ if (!(*visitor)(image, module, "9", parent, base, extension, arg)) {
+ break;
+ }
+
+ }
+}
+