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/*
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* Copyright (c) 2014, 2017, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*
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*/
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#include "precompiled.hpp"
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#include "classfile/classLoader.hpp"
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#include "classfile/classLoaderExt.hpp"
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#include "classfile/dictionary.hpp"
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#include "classfile/javaClasses.hpp"
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#include "classfile/sharedClassUtil.hpp"
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#include "classfile/stringTable.hpp"
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#include "classfile/symbolTable.hpp"
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#include "classfile/systemDictionary.hpp"
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#include "classfile/systemDictionaryShared.hpp"
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#include "memory/filemap.hpp"
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#include "memory/metadataFactory.hpp"
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#include "memory/resourceArea.hpp"
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#include "oops/instanceKlass.hpp"
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#include "runtime/arguments.hpp"
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#include "runtime/java.hpp"
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#include "runtime/os.hpp"
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class ManifestStream: public ResourceObj {
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private:
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u1* _buffer_start; // Buffer bottom
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u1* _buffer_end; // Buffer top (one past last element)
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u1* _current; // Current buffer position
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public:
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// Constructor
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ManifestStream(u1* buffer, int length) : _buffer_start(buffer),
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_current(buffer) {
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_buffer_end = buffer + length;
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}
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static bool is_attr(u1* attr, const char* name) {
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return strncmp((const char*)attr, name, strlen(name)) == 0;
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}
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static char* copy_attr(u1* value, size_t len) {
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char* buf = NEW_RESOURCE_ARRAY(char, len + 1);
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strncpy(buf, (char*)value, len);
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buf[len] = 0;
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return buf;
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}
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// The return value indicates if the JAR is signed or not
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bool check_is_signed() {
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u1* attr = _current;
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bool isSigned = false;
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while (_current < _buffer_end) {
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if (*_current == '\n') {
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*_current = '\0';
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u1* value = (u1*)strchr((char*)attr, ':');
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if (value != NULL) {
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assert(*(value+1) == ' ', "Unrecognized format" );
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if (strstr((char*)attr, "-Digest") != NULL) {
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isSigned = true;
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break;
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}
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}
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*_current = '\n'; // restore
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attr = _current + 1;
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}
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_current ++;
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}
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return isSigned;
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}
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};
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void SharedPathsMiscInfoExt::print_path(outputStream* out, int type, const char* path) {
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switch(type) {
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case APP:
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ClassLoader::trace_class_path("Expecting -Djava.class.path=", path);
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break;
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default:
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SharedPathsMiscInfo::print_path(out, type, path);
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}
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}
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bool SharedPathsMiscInfoExt::check(jint type, const char* path) {
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switch (type) {
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case APP:
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{
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// Prefix is OK: E.g., dump with -cp foo.jar, but run with -cp foo.jar:bar.jar
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size_t len = strlen(path);
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const char *appcp = Arguments::get_appclasspath();
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assert(appcp != NULL, "NULL app classpath");
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size_t appcp_len = strlen(appcp);
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if (appcp_len < len) {
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return fail("Run time APP classpath is shorter than the one at dump time: ", appcp);
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}
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ResourceMark rm;
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char* tmp_path;
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if (len == appcp_len) {
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tmp_path = (char*)appcp;
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} else {
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tmp_path = NEW_RESOURCE_ARRAY(char, len + 1);
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strncpy(tmp_path, appcp, len);
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tmp_path[len] = 0;
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}
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if (os::file_name_strcmp(path, tmp_path) != 0) {
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return fail("[APP classpath mismatch, actual: -Djava.class.path=", appcp);
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}
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if (appcp[len] != '\0' && appcp[len] != os::path_separator()[0]) {
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return fail("Dump time APP classpath is not a proper prefix of run time APP classpath: ", appcp);
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}
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}
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break;
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default:
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return SharedPathsMiscInfo::check(type, path);
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}
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return true;
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}
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void SharedClassUtil::update_shared_classpath(ClassPathEntry *cpe, SharedClassPathEntry* e, TRAPS) {
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ClassLoaderData* loader_data = ClassLoaderData::the_null_class_loader_data();
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SharedClassPathEntryExt* ent = (SharedClassPathEntryExt*)e;
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ResourceMark rm(THREAD);
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jint manifest_size;
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bool isSigned;
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char* manifest = ClassLoaderExt::read_manifest(cpe, &manifest_size, CHECK);
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if (manifest != NULL) {
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ManifestStream* stream = new ManifestStream((u1*)manifest,
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manifest_size);
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isSigned = stream->check_is_signed();
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if (isSigned) {
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ent->_is_signed = true;
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} else {
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// Copy the manifest into the shared archive
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manifest = ClassLoaderExt::read_raw_manifest(cpe, &manifest_size, CHECK);
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Array<u1>* buf = MetadataFactory::new_array<u1>(loader_data,
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manifest_size,
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THREAD);
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char* p = (char*)(buf->data());
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memcpy(p, manifest, manifest_size);
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ent->set_manifest(buf);
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ent->_is_signed = false;
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}
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}
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}
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void SharedClassUtil::initialize(TRAPS) {
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if (UseSharedSpaces) {
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int size = FileMapInfo::get_number_of_share_classpaths();
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if (size > 0) {
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SystemDictionaryShared::allocate_shared_data_arrays(size, THREAD);
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if (!DumpSharedSpaces) {
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FileMapHeaderExt* header = (FileMapHeaderExt*)FileMapInfo::current_info()->header();
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ClassLoaderExt::init_paths_start_index(header->_app_paths_start_index);
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}
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}
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}
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if (DumpSharedSpaces) {
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if (SharedArchiveConfigFile) {
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read_extra_data(SharedArchiveConfigFile, THREAD);
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}
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}
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}
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void SharedClassUtil::read_extra_data(const char* filename, TRAPS) {
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HashtableTextDump reader(filename);
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reader.check_version("VERSION: 1.0");
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while (reader.remain() > 0) {
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int utf8_length;
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int prefix_type = reader.scan_prefix(&utf8_length);
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ResourceMark rm(THREAD);
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char* utf8_buffer = NEW_RESOURCE_ARRAY(char, utf8_length);
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reader.get_utf8(utf8_buffer, utf8_length);
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if (prefix_type == HashtableTextDump::SymbolPrefix) {
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SymbolTable::new_symbol(utf8_buffer, utf8_length, THREAD);
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} else{
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assert(prefix_type == HashtableTextDump::StringPrefix, "Sanity");
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utf8_buffer[utf8_length] = '\0';
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oop s = StringTable::intern(utf8_buffer, THREAD);
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}
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}
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}
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bool SharedClassUtil::is_classpath_entry_signed(int classpath_index) {
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assert(classpath_index >= 0, "Sanity");
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SharedClassPathEntryExt* ent = (SharedClassPathEntryExt*)
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FileMapInfo::shared_classpath(classpath_index);
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return ent->_is_signed;
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}
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void FileMapHeaderExt::populate(FileMapInfo* mapinfo, size_t alignment) {
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FileMapInfo::FileMapHeader::populate(mapinfo, alignment);
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ClassLoaderExt::finalize_shared_paths_misc_info();
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_app_paths_start_index = ClassLoaderExt::app_paths_start_index();
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_verify_local = BytecodeVerificationLocal;
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_verify_remote = BytecodeVerificationRemote;
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_has_platform_or_app_classes = ClassLoaderExt::has_platform_or_app_classes();
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}
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bool FileMapHeaderExt::validate() {
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if (UseAppCDS) {
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const char* prop = Arguments::get_property("java.system.class.loader");
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if (prop != NULL) {
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warning("UseAppCDS is disabled because the java.system.class.loader property is specified (value = \"%s\"). "
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"To enable UseAppCDS, this property must be not be set", prop);
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UseAppCDS = false;
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}
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}
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if (!FileMapInfo::FileMapHeader::validate()) {
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return false;
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}
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// For backwards compatibility, we don't check the verification setting
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// if the archive only contains system classes.
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if (_has_platform_or_app_classes &&
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((!_verify_local && BytecodeVerificationLocal) ||
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(!_verify_remote && BytecodeVerificationRemote))) {
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FileMapInfo::fail_continue("The shared archive file was created with less restrictive "
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"verification setting than the current setting.");
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return false;
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}
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return true;
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}
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