Mercurial > hg > graal-compiler
view src/share/vm/memory/restore.cpp @ 2267:02f78cfa4656
7020992: jmm_DumpThreads should not allocate system object arrays outside the perm gen
Summary: Allocate ordinary object arrays
Reviewed-by: ysr, never, mchung
author | stefank |
---|---|
date | Mon, 21 Feb 2011 11:26:45 +0100 |
parents | 3582bf76420e |
children | 1d1603768966 |
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/* * Copyright (c) 2003, 2010, 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/symbolTable.hpp" #include "classfile/systemDictionary.hpp" #include "memory/filemap.hpp" #include "oops/oop.inline.hpp" #include "utilities/hashtable.inline.hpp" // Closure for serializing initialization data in from a data area // (oop_array) read from the shared file. class ReadClosure : public SerializeOopClosure { private: oop** _oop_array; inline oop nextOop() { return *(*_oop_array)++; } public: ReadClosure(oop** oop_array) { _oop_array = oop_array; } void do_oop(oop* p) { assert(SharedSkipVerify || *p == NULL || *p == Universe::klassKlassObj(), "initializing previously initialized oop."); oop obj = nextOop(); assert(SharedSkipVerify || (intptr_t)obj >= 0 || (intptr_t)obj < -100, "hit tag while initializing oops."); assert(SharedSkipVerify || obj->is_oop_or_null(), "invalid oop"); *p = obj; } void do_oop(narrowOop* p) { ShouldNotReachHere(); } void do_ptr(void** p) { assert(*p == NULL, "initializing previous initialized pointer."); void* obj = nextOop(); assert((intptr_t)obj >= 0 || (intptr_t)obj < -100, "hit tag while initializing ptrs."); *p = obj; } void do_ptr(HeapWord** p) { do_ptr((void **) p); } void do_int(int* p) { *p = (int)(intptr_t)nextOop(); } void do_size_t(size_t* p) { // Assumes that size_t and pointers are the same size. *p = (size_t)nextOop(); } void do_tag(int tag) { int old_tag; do_int(&old_tag); FileMapInfo::assert_mark(tag == old_tag); } void do_region(u_char* start, size_t size) { assert((intptr_t)start % sizeof(oop) == 0, "bad alignment"); assert(size % sizeof(oop) == 0, "bad size"); do_tag((int)size); while (size > 0) { *(oop*)start = nextOop(); start += sizeof(oop); size -= sizeof(oop); } } bool reading() const { return true; } }; // Read the oop and miscellaneous data from the shared file, and // serialize it out to its various destinations. void CompactingPermGenGen::initialize_oops() { FileMapInfo *mapinfo = FileMapInfo::current_info(); char* buffer = mapinfo->region_base(md); // Skip over (reserve space for) a list of addresses of C++ vtables // for Klass objects. They get filled in later. void** vtbl_list = (void**)buffer; buffer += vtbl_list_size * sizeof(void*); Universe::init_self_patching_vtbl_list(vtbl_list, vtbl_list_size); // Skip over (reserve space for) dummy C++ vtables Klass objects. // They are used as is. intptr_t vtable_size = *(intptr_t*)buffer; buffer += sizeof(intptr_t); buffer += vtable_size; // Skip the recorded symbols. intptr_t total_symbol_size = *(intptr_t*)buffer; buffer += sizeof(intptr_t) * 2; buffer += total_symbol_size; // Create the symbol table using the bucket array at this spot in the // misc data space. Since the symbol table is often modified, this // region (of mapped pages) will be copy-on-write. int symbolTableLen = *(intptr_t*)buffer; buffer += sizeof(intptr_t); int number_of_entries = *(intptr_t*)buffer; buffer += sizeof(intptr_t); SymbolTable::create_table((HashtableBucket*)buffer, symbolTableLen, number_of_entries); buffer += symbolTableLen; // Create the string table using the bucket array at this spot in the // misc data space. Since the string table is often modified, this // region (of mapped pages) will be copy-on-write. int stringTableLen = *(intptr_t*)buffer; buffer += sizeof(intptr_t); number_of_entries = *(intptr_t*)buffer; buffer += sizeof(intptr_t); StringTable::create_table((HashtableBucket*)buffer, stringTableLen, number_of_entries); buffer += stringTableLen; // Create the shared dictionary using the bucket array at this spot in // the misc data space. Since the shared dictionary table is never // modified, this region (of mapped pages) will be (effectively, if // not explicitly) read-only. int sharedDictionaryLen = *(intptr_t*)buffer; buffer += sizeof(intptr_t); number_of_entries = *(intptr_t*)buffer; buffer += sizeof(intptr_t); SystemDictionary::set_shared_dictionary((HashtableBucket*)buffer, sharedDictionaryLen, number_of_entries); buffer += sharedDictionaryLen; // Create the package info table using the bucket array at this spot in // the misc data space. Since the package info table is never // modified, this region (of mapped pages) will be (effectively, if // not explicitly) read-only. int pkgInfoLen = *(intptr_t*)buffer; buffer += sizeof(intptr_t); number_of_entries = *(intptr_t*)buffer; buffer += sizeof(intptr_t); ClassLoader::create_package_info_table((HashtableBucket*)buffer, pkgInfoLen, number_of_entries); buffer += pkgInfoLen; ClassLoader::verify(); // The following data in the shared misc data region are the linked // list elements (HashtableEntry objects) for the symbol table, string // table, and shared dictionary. The heap objects refered to by the // symbol table, string table, and shared dictionary are permanent and // unmovable. Since new entries added to the string and symbol tables // are always added at the beginning of the linked lists, THESE LINKED // LIST ELEMENTS ARE READ-ONLY. int len = *(intptr_t*)buffer; // skip over symbol table entries buffer += sizeof(intptr_t); buffer += len; len = *(intptr_t*)buffer; // skip over string table entries buffer += sizeof(intptr_t); buffer += len; len = *(intptr_t*)buffer; // skip over shared dictionary entries buffer += sizeof(intptr_t); buffer += len; len = *(intptr_t*)buffer; // skip over package info table entries buffer += sizeof(intptr_t); buffer += len; len = *(intptr_t*)buffer; // skip over package info table char[] arrays. buffer += sizeof(intptr_t); buffer += len; oop* oop_array = (oop*)buffer; ReadClosure rc(&oop_array); serialize_oops(&rc); }