--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/hotspot/share/classfile/sharedPathsMiscInfo.cpp	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2014, 2017, 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 "precompiled.hpp"
+#include "classfile/classLoader.hpp"
+#include "classfile/classLoaderData.inline.hpp"
+#include "classfile/sharedPathsMiscInfo.hpp"
+#include "logging/log.hpp"
+#include "logging/logStream.hpp"
+#include "memory/allocation.inline.hpp"
+#include "memory/metaspaceShared.hpp"
+#include "memory/resourceArea.hpp"
+#include "runtime/arguments.hpp"
+#include "utilities/ostream.hpp"
+
+void SharedPathsMiscInfo::add_path(const char* path, int type) {
+  log_info(class, path)("type=%s ", type_name(type));
+  ClassLoader::trace_class_path("add misc shared path ", path);
+  write(path, strlen(path) + 1);
+  write_jint(jint(type));
+}
+
+void SharedPathsMiscInfo::ensure_size(size_t needed_bytes) {
+  assert(_allocated, "cannot modify buffer during validation.");
+  int used = get_used_bytes();
+  int target = used + int(needed_bytes);
+  if (target > _buf_size) {
+    _buf_size = _buf_size * 2 + (int)needed_bytes;
+    _buf_start = REALLOC_C_HEAP_ARRAY(char, _buf_start, _buf_size, mtClass);
+    _cur_ptr = _buf_start + used;
+    _end_ptr = _buf_start + _buf_size;
+  }
+}
+
+void SharedPathsMiscInfo::write(const void* ptr, size_t size) {
+  ensure_size(size);
+  memcpy(_cur_ptr, ptr, size);
+  _cur_ptr += size;
+}
+
+bool SharedPathsMiscInfo::read(void* ptr, size_t size) {
+  if (_cur_ptr + size <= _end_ptr) {
+    memcpy(ptr, _cur_ptr, size);
+    _cur_ptr += size;
+    return true;
+  }
+  return false;
+}
+
+bool SharedPathsMiscInfo::fail(const char* msg, const char* name) {
+  ClassLoader::trace_class_path(msg, name);
+  MetaspaceShared::set_archive_loading_failed();
+  return false;
+}
+
+void SharedPathsMiscInfo::print_path(outputStream* out, int type, const char* path) {
+  switch (type) {
+  case BOOT:
+    out->print("Expecting BOOT path=%s", path);
+    break;
+  case NON_EXIST:
+    out->print("Expecting that %s does not exist", path);
+    break;
+  default:
+    ShouldNotReachHere();
+  }
+}
+
+bool SharedPathsMiscInfo::check() {
+  // The whole buffer must be 0 terminated so that we can use strlen and strcmp
+  // without fear.
+  _end_ptr -= sizeof(jint);
+  if (_cur_ptr >= _end_ptr) {
+    return fail("Truncated archive file header");
+  }
+  if (*_end_ptr != 0) {
+    return fail("Corrupted archive file header");
+  }
+
+  while (_cur_ptr < _end_ptr) {
+    jint type;
+    const char* path = _cur_ptr;
+    _cur_ptr += strlen(path) + 1;
+    if (!read_jint(&type)) {
+      return fail("Corrupted archive file header");
+    }
+    LogTarget(Info, class, path) lt;
+    if (lt.is_enabled()) {
+      lt.print("type=%s ", type_name(type));
+      LogStream ls(lt);
+      print_path(&ls, type, path);
+      ls.cr();
+    }
+    if (!check(type, path)) {
+      if (!PrintSharedArchiveAndExit) {
+        return false;
+      }
+    } else {
+      ClassLoader::trace_class_path("ok");
+    }
+  }
+
+  return true;
+}
+
+bool SharedPathsMiscInfo::check(jint type, const char* path) {
+  switch (type) {
+  case BOOT:
+    if (os::file_name_strcmp(path, Arguments::get_sysclasspath()) != 0) {
+      return fail("[BOOT classpath mismatch, actual =", Arguments::get_sysclasspath());
+    }
+    break;
+  case NON_EXIST:
+    {
+      struct stat st;
+      if (os::stat(path, &st) == 0) {
+        // The file actually exists
+        // But we want it to not exist -> fail
+        return fail("File must not exist");
+      }
+    }
+    break;
+  default:
+    return fail("Corrupted archive file header");
+  }
+
+  return true;
+}