Mercurial > hg > graal-compiler
view src/share/vm/classfile/sharedPathsMiscInfo.hpp @ 21638:b6aadfd3dfbe
fixed compile error in FilterTypes.java
author | Doug Simon <doug.simon@oracle.com> |
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date | Mon, 01 Jun 2015 16:10:50 +0200 |
parents | bb239308be67 |
children |
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/* * 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. * */ #ifndef SHARE_VM_CLASSFILE_SHAREDPATHSMISCINFO_HPP #define SHARE_VM_CLASSFILE_SHAREDPATHSMISCINFO_HPP #include "runtime/os.hpp" // During dumping time, when processing class paths, we build up the dump-time // classpath. The JAR files that exist are stored in the list ClassLoader::_first_entry. // However, we need to store other "misc" information for run-time checking, such as // // + The values of Arguments::get_sysclasspath() used during dumping. // // + The meta-index file(s) used during dumping (incl modification time and size) // // + The class path elements specified during dumping but did not exist -- // these elements must also be specified at run time, and they also must not // exist at run time. // // These misc items are stored in a linear buffer in SharedPathsMiscInfo. // The storage format is stream oriented to minimize its size. // // When writing the information to the archive file, SharedPathsMiscInfo is stored in // the archive file header. At run-time, this information is used only during initialization // (accessed using read() instead of mmap()), and is deallocated afterwards to save space. // // The SharedPathsMiscInfo class is used for both creating the the information (during // dumping time) and validation (at run time). Different constructors are used in the // two situations. See below. class SharedPathsMiscInfo : public CHeapObj<mtClass> { protected: char* _buf_start; char* _cur_ptr; char* _end_ptr; int _buf_size; bool _allocated; // was _buf_start allocated by me? void ensure_size(size_t needed_bytes); void add_path(const char* path, int type); void write(const void* ptr, size_t size); bool read(void* ptr, size_t size); static void trace_class_path(const char* msg, const char* name = NULL) { ClassLoader::trace_class_path(msg, name); } protected: static bool fail(const char* msg, const char* name = NULL); virtual bool check(jint type, const char* path); public: enum { INITIAL_BUF_SIZE = 128 }; // This constructor is used when creating the misc information (during dump) SharedPathsMiscInfo() { _buf_size = INITIAL_BUF_SIZE; _cur_ptr = _buf_start = NEW_C_HEAP_ARRAY(char, _buf_size, mtClass); _allocated = true; } // This constructor is used when validating the misc info (during run time) SharedPathsMiscInfo(char *buff, int size) { _cur_ptr = _buf_start = buff; _end_ptr = _buf_start + size; _buf_size = size; _allocated = false; } ~SharedPathsMiscInfo() { if (_allocated) { FREE_C_HEAP_ARRAY(char, _buf_start, mtClass); } } int get_used_bytes() { return _cur_ptr - _buf_start; } void* buffer() { return _buf_start; } // writing -- // The path must not exist at run-time void add_nonexist_path(const char* path) { add_path(path, NON_EXIST); } // The path must exist and have required size and modification time void add_required_file(const char* path) { add_path(path, REQUIRED); struct stat st; if (os::stat(path, &st) != 0) { assert(0, "sanity"); ClassLoader::exit_with_path_failure("failed to os::stat(%s)", path); // should not happen } write_time(st.st_mtime); write_long(st.st_size); } // The path must exist, and must contain exactly <num_entries> files/dirs void add_boot_classpath(const char* path) { add_path(path, BOOT); } int write_jint(jint num) { write(&num, sizeof(num)); return 0; } void write_time(time_t t) { write(&t, sizeof(t)); } void write_long(long l) { write(&l, sizeof(l)); } bool dump_to_file(int fd) { int n = get_used_bytes(); return (os::write(fd, _buf_start, n) == (size_t)n); } // reading -- enum { BOOT = 1, NON_EXIST = 2, REQUIRED = 3 }; virtual const char* type_name(int type) { switch (type) { case BOOT: return "BOOT"; case NON_EXIST: return "NON_EXIST"; case REQUIRED: return "REQUIRED"; default: ShouldNotReachHere(); return "?"; } } virtual void print_path(outputStream* out, int type, const char* path) { switch (type) { case BOOT: out->print("Expecting -Dsun.boot.class.path=%s", path); break; case NON_EXIST: out->print("Expecting that %s does not exist", path); break; case REQUIRED: out->print("Expecting that file %s must exist and is not altered", path); break; default: ShouldNotReachHere(); } } bool check(); bool read_jint(jint *ptr) { return read(ptr, sizeof(jint)); } bool read_long(long *ptr) { return read(ptr, sizeof(long)); } bool read_time(time_t *ptr) { return read(ptr, sizeof(time_t)); } }; #endif // SHARE_VM_CLASSFILE_SHAREDPATHSMISCINFO_HPP