iklam@7089: /*
ccheung@8184:  * Copyright (c) 2014, 2015, Oracle and/or its affiliates. All rights reserved.
iklam@7089:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
iklam@7089:  *
iklam@7089:  * This code is free software; you can redistribute it and/or modify it
iklam@7089:  * under the terms of the GNU General Public License version 2 only, as
iklam@7089:  * published by the Free Software Foundation.
iklam@7089:  *
iklam@7089:  * This code is distributed in the hope that it will be useful, but WITHOUT
iklam@7089:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
iklam@7089:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
iklam@7089:  * version 2 for more details (a copy is included in the LICENSE file that
iklam@7089:  * accompanied this code).
iklam@7089:  *
iklam@7089:  * You should have received a copy of the GNU General Public License version
iklam@7089:  * 2 along with this work; if not, write to the Free Software Foundation,
iklam@7089:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
iklam@7089:  *
iklam@7089:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
iklam@7089:  * or visit www.oracle.com if you need additional information or have any
iklam@7089:  * questions.
iklam@7089:  *
iklam@7089:  */
iklam@7089: 
iklam@7089: #include "precompiled.hpp"
iklam@7089: #include "classfile/classLoader.hpp"
iklam@7089: #include "classfile/classLoaderData.inline.hpp"
iklam@7089: #include "classfile/sharedPathsMiscInfo.hpp"
iklam@7089: #include "memory/allocation.inline.hpp"
iklam@7089: #include "memory/metaspaceShared.hpp"
iklam@7089: #include "runtime/arguments.hpp"
iklam@7089: 
iklam@7089: void SharedPathsMiscInfo::add_path(const char* path, int type) {
iklam@7089:   if (TraceClassPaths) {
iklam@7089:     tty->print("[type=%s] ", type_name(type));
iklam@7089:     trace_class_path("[Add misc shared path ", path);
iklam@7089:   }
iklam@7089:   write(path, strlen(path) + 1);
iklam@7089:   write_jint(jint(type));
iklam@7089: }
iklam@7089: 
iklam@7089: void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {
iklam@7089:   assert(_allocated, "cannot modify buffer during validation.");
iklam@7089:   int used = get_used_bytes();
iklam@7089:   int target = used + int(needed_bytes);
iklam@7089:   if (target > _buf_size) {
iklam@7089:     _buf_size = _buf_size * 2 + (int)needed_bytes;
iklam@7089:     _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);
iklam@7089:     _cur_ptr = _buf_start + used;
iklam@7089:     _end_ptr = _buf_start + _buf_size;
iklam@7089:   }
iklam@7089: }
iklam@7089: 
iklam@7089: void SharedPathsMiscInfo::write(const void* ptr, size_t size) {
iklam@7089:   ensure_size(size);
iklam@7089:   memcpy(_cur_ptr, ptr, size);
iklam@7089:   _cur_ptr += size;
iklam@7089: }
iklam@7089: 
iklam@7089: bool SharedPathsMiscInfo::read(void* ptr, size_t size) {
iklam@7089:   if (_cur_ptr + size <= _end_ptr) {
iklam@7089:     memcpy(ptr, _cur_ptr, size);
iklam@7089:     _cur_ptr += size;
iklam@7089:     return true;
iklam@7089:   }
iklam@7089:   return false;
iklam@7089: }
iklam@7089: 
iklam@7089: bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {
ccheung@8184:   ClassLoader::trace_class_path(tty, msg, name);
iklam@7089:   MetaspaceShared::set_archive_loading_failed();
iklam@7089:   return false;
iklam@7089: }
iklam@7089: 
iklam@7089: bool SharedPathsMiscInfo::check() {
iklam@7089:   // The whole buffer must be 0 terminated so that we can use strlen and strcmp
iklam@7089:   // without fear.
iklam@7089:   _end_ptr -= sizeof(jint);
iklam@7089:   if (_cur_ptr >= _end_ptr) {
iklam@7089:     return fail("Truncated archive file header");
iklam@7089:   }
iklam@7089:   if (*_end_ptr != 0) {
iklam@7089:     return fail("Corrupted archive file header");
iklam@7089:   }
iklam@7089: 
iklam@7089:   while (_cur_ptr < _end_ptr) {
iklam@7089:     jint type;
iklam@7089:     const char* path = _cur_ptr;
iklam@7089:     _cur_ptr += strlen(path) + 1;
iklam@7089:     if (!read_jint(&type)) {
iklam@7089:       return fail("Corrupted archive file header");
iklam@7089:     }
iklam@7089:     if (TraceClassPaths) {
iklam@7089:       tty->print("[type=%s ", type_name(type));
iklam@7089:       print_path(tty, type, path);
iklam@7089:       tty->print_cr("]");
iklam@7089:     }
iklam@7089:     if (!check(type, path)) {
iklam@7089:       if (!PrintSharedArchiveAndExit) {
iklam@7089:         return false;
iklam@7089:       }
iklam@7089:     } else {
iklam@7089:       trace_class_path("[ok");
iklam@7089:     }
iklam@7089:   }
iklam@7089: 
iklam@7089:   return true;
iklam@7089: }
iklam@7089: 
iklam@7089: bool SharedPathsMiscInfo::check(jint type, const char* path) {
iklam@7089:   switch (type) {
iklam@7089:   case BOOT:
iklam@7089:     if (strcmp(path, Arguments::get_sysclasspath()) != 0) {
iklam@7089:       return fail("[BOOT classpath mismatch, actual: -Dsun.boot.class.path=", Arguments::get_sysclasspath());
iklam@7089:     }
iklam@7089:     break;
iklam@7089:   case NON_EXIST: // fall-through
iklam@7089:   case REQUIRED:
iklam@7089:     {
iklam@7089:       struct stat st;
iklam@7089:       if (os::stat(path, &st) != 0) {
iklam@7089:         // The file does not actually exist
iklam@7089:         if (type == REQUIRED) {
iklam@7089:           // but we require it to exist -> fail
iklam@7089:           return fail("Required file doesn't exist");
iklam@7089:         }
iklam@7089:       } else {
iklam@7089:         // The file actually exists
iklam@7089:         if (type == NON_EXIST) {
iklam@7089:           // But we want it to not exist -> fail
iklam@7089:           return fail("File must not exist");
iklam@7089:         }
iklam@7089:         time_t    timestamp;
iklam@7089:         long      filesize;
iklam@7089: 
iklam@7089:         if (!read_time(&timestamp) || !read_long(&filesize)) {
iklam@7089:           return fail("Corrupted archive file header");
iklam@7089:         }
iklam@7089:         if (timestamp != st.st_mtime) {
iklam@7089:           return fail("Timestamp mismatch");
iklam@7089:         }
iklam@7090:         if (filesize != st.st_size) {
iklam@7089:           return fail("File size mismatch");
iklam@7089:         }
iklam@7089:       }
iklam@7089:     }
iklam@7089:     break;
iklam@7089: 
iklam@7089:   default:
iklam@7089:     return fail("Corrupted archive file header");
iklam@7089:   }
iklam@7089: 
iklam@7089:   return true;
iklam@7089: }