291 lines
11 KiB
C++
291 lines
11 KiB
C++
/*
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* Copyright (c) 1997, 2018, 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 "gc/shared/genCollectedHeap.hpp"
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#include "memory/allocation.hpp"
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#include "memory/allocation.inline.hpp"
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#include "memory/arena.hpp"
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#include "memory/metaspaceShared.hpp"
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#include "memory/resourceArea.hpp"
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#include "memory/universe.hpp"
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#include "runtime/atomic.hpp"
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#include "runtime/os.hpp"
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#include "runtime/task.hpp"
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#include "runtime/threadCritical.hpp"
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#include "services/memTracker.hpp"
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#include "utilities/ostream.hpp"
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// allocate using malloc; will fail if no memory available
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char* AllocateHeap(size_t size,
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MEMFLAGS flags,
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const NativeCallStack& stack,
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AllocFailType alloc_failmode /* = AllocFailStrategy::EXIT_OOM*/) {
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char* p = (char*) os::malloc(size, flags, stack);
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if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
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vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "AllocateHeap");
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}
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return p;
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}
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char* AllocateHeap(size_t size,
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MEMFLAGS flags,
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AllocFailType alloc_failmode /* = AllocFailStrategy::EXIT_OOM*/) {
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return AllocateHeap(size, flags, CALLER_PC);
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}
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char* ReallocateHeap(char *old,
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size_t size,
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MEMFLAGS flag,
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AllocFailType alloc_failmode) {
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char* p = (char*) os::realloc(old, size, flag, CALLER_PC);
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if (p == NULL && alloc_failmode == AllocFailStrategy::EXIT_OOM) {
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vm_exit_out_of_memory(size, OOM_MALLOC_ERROR, "ReallocateHeap");
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}
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return p;
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}
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void FreeHeap(void* p) {
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os::free(p);
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}
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void* MetaspaceObj::_shared_metaspace_base = NULL;
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void* MetaspaceObj::_shared_metaspace_top = NULL;
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void* StackObj::operator new(size_t size) throw() { ShouldNotCallThis(); return 0; }
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void StackObj::operator delete(void* p) { ShouldNotCallThis(); }
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void* StackObj::operator new [](size_t size) throw() { ShouldNotCallThis(); return 0; }
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void StackObj::operator delete [](void* p) { ShouldNotCallThis(); }
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void* MetaspaceObj::operator new(size_t size, ClassLoaderData* loader_data,
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size_t word_size,
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MetaspaceObj::Type type, TRAPS) throw() {
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// Klass has it's own operator new
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return Metaspace::allocate(loader_data, word_size, type, THREAD);
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}
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bool MetaspaceObj::is_metaspace_object() const {
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return Metaspace::contains((void*)this);
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}
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void MetaspaceObj::print_address_on(outputStream* st) const {
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st->print(" {" INTPTR_FORMAT "}", p2i(this));
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}
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void* ResourceObj::operator new(size_t size, Arena *arena) throw() {
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address res = (address)arena->Amalloc(size);
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DEBUG_ONLY(set_allocation_type(res, ARENA);)
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return res;
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}
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void* ResourceObj::operator new [](size_t size, Arena *arena) throw() {
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address res = (address)arena->Amalloc(size);
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DEBUG_ONLY(set_allocation_type(res, ARENA);)
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return res;
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}
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void* ResourceObj::operator new(size_t size, allocation_type type, MEMFLAGS flags) throw() {
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address res = NULL;
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switch (type) {
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case C_HEAP:
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res = (address)AllocateHeap(size, flags, CALLER_PC);
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DEBUG_ONLY(set_allocation_type(res, C_HEAP);)
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break;
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case RESOURCE_AREA:
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// new(size) sets allocation type RESOURCE_AREA.
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res = (address)operator new(size);
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break;
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default:
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ShouldNotReachHere();
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}
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return res;
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}
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void* ResourceObj::operator new [](size_t size, allocation_type type, MEMFLAGS flags) throw() {
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return (address) operator new(size, type, flags);
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}
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void* ResourceObj::operator new(size_t size, const std::nothrow_t& nothrow_constant,
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allocation_type type, MEMFLAGS flags) throw() {
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// should only call this with std::nothrow, use other operator new() otherwise
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address res = NULL;
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switch (type) {
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case C_HEAP:
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res = (address)AllocateHeap(size, flags, CALLER_PC, AllocFailStrategy::RETURN_NULL);
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DEBUG_ONLY(if (res!= NULL) set_allocation_type(res, C_HEAP);)
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break;
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case RESOURCE_AREA:
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// new(size) sets allocation type RESOURCE_AREA.
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res = (address)operator new(size, std::nothrow);
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break;
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default:
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ShouldNotReachHere();
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}
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return res;
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}
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void* ResourceObj::operator new [](size_t size, const std::nothrow_t& nothrow_constant,
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allocation_type type, MEMFLAGS flags) throw() {
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return (address)operator new(size, nothrow_constant, type, flags);
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}
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void ResourceObj::operator delete(void* p) {
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assert(((ResourceObj *)p)->allocated_on_C_heap(),
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"delete only allowed for C_HEAP objects");
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DEBUG_ONLY(((ResourceObj *)p)->_allocation_t[0] = (uintptr_t)badHeapOopVal;)
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FreeHeap(p);
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}
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void ResourceObj::operator delete [](void* p) {
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operator delete(p);
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}
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#ifdef ASSERT
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void ResourceObj::set_allocation_type(address res, allocation_type type) {
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// Set allocation type in the resource object
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uintptr_t allocation = (uintptr_t)res;
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assert((allocation & allocation_mask) == 0, "address should be aligned to 4 bytes at least: " INTPTR_FORMAT, p2i(res));
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assert(type <= allocation_mask, "incorrect allocation type");
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ResourceObj* resobj = (ResourceObj *)res;
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resobj->_allocation_t[0] = ~(allocation + type);
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if (type != STACK_OR_EMBEDDED) {
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// Called from operator new() and CollectionSetChooser(),
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// set verification value.
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resobj->_allocation_t[1] = (uintptr_t)&(resobj->_allocation_t[1]) + type;
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}
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}
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ResourceObj::allocation_type ResourceObj::get_allocation_type() const {
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assert(~(_allocation_t[0] | allocation_mask) == (uintptr_t)this, "lost resource object");
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return (allocation_type)((~_allocation_t[0]) & allocation_mask);
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}
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bool ResourceObj::is_type_set() const {
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allocation_type type = (allocation_type)(_allocation_t[1] & allocation_mask);
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return get_allocation_type() == type &&
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(_allocation_t[1] - type) == (uintptr_t)(&_allocation_t[1]);
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}
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ResourceObj::ResourceObj() { // default constructor
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if (~(_allocation_t[0] | allocation_mask) != (uintptr_t)this) {
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// Operator new() is not called for allocations
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// on stack and for embedded objects.
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set_allocation_type((address)this, STACK_OR_EMBEDDED);
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} else if (allocated_on_stack()) { // STACK_OR_EMBEDDED
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// For some reason we got a value which resembles
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// an embedded or stack object (operator new() does not
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// set such type). Keep it since it is valid value
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// (even if it was garbage).
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// Ignore garbage in other fields.
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} else if (is_type_set()) {
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// Operator new() was called and type was set.
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assert(!allocated_on_stack(),
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"not embedded or stack, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
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p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
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} else {
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// Operator new() was not called.
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// Assume that it is embedded or stack object.
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set_allocation_type((address)this, STACK_OR_EMBEDDED);
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}
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_allocation_t[1] = 0; // Zap verification value
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}
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ResourceObj::ResourceObj(const ResourceObj& r) { // default copy constructor
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// Used in ClassFileParser::parse_constant_pool_entries() for ClassFileStream.
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// Note: garbage may resembles valid value.
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assert(~(_allocation_t[0] | allocation_mask) != (uintptr_t)this || !is_type_set(),
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"embedded or stack only, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
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p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
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set_allocation_type((address)this, STACK_OR_EMBEDDED);
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_allocation_t[1] = 0; // Zap verification value
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}
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ResourceObj& ResourceObj::operator=(const ResourceObj& r) { // default copy assignment
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// Used in InlineTree::ok_to_inline() for WarmCallInfo.
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assert(allocated_on_stack(),
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"copy only into local, this(" PTR_FORMAT ") type %d a[0]=(" PTR_FORMAT ") a[1]=(" PTR_FORMAT ")",
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p2i(this), get_allocation_type(), _allocation_t[0], _allocation_t[1]);
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// Keep current _allocation_t value;
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return *this;
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}
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ResourceObj::~ResourceObj() {
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// allocated_on_C_heap() also checks that encoded (in _allocation) address == this.
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if (!allocated_on_C_heap()) { // ResourceObj::delete() will zap _allocation for C_heap.
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_allocation_t[0] = (uintptr_t)badHeapOopVal; // zap type
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}
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}
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#endif // ASSERT
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//--------------------------------------------------------------------------------------
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// Non-product code
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#ifndef PRODUCT
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void AllocatedObj::print() const { print_on(tty); }
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void AllocatedObj::print_value() const { print_value_on(tty); }
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void AllocatedObj::print_on(outputStream* st) const {
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st->print_cr("AllocatedObj(" INTPTR_FORMAT ")", p2i(this));
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}
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void AllocatedObj::print_value_on(outputStream* st) const {
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st->print("AllocatedObj(" INTPTR_FORMAT ")", p2i(this));
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}
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AllocStats::AllocStats() {
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start_mallocs = os::num_mallocs;
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start_frees = os::num_frees;
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start_malloc_bytes = os::alloc_bytes;
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start_mfree_bytes = os::free_bytes;
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start_res_bytes = Arena::_bytes_allocated;
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}
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julong AllocStats::num_mallocs() { return os::num_mallocs - start_mallocs; }
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julong AllocStats::alloc_bytes() { return os::alloc_bytes - start_malloc_bytes; }
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julong AllocStats::num_frees() { return os::num_frees - start_frees; }
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julong AllocStats::free_bytes() { return os::free_bytes - start_mfree_bytes; }
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julong AllocStats::resource_bytes() { return Arena::_bytes_allocated - start_res_bytes; }
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void AllocStats::print() {
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tty->print_cr(UINT64_FORMAT " mallocs (" UINT64_FORMAT "MB), "
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UINT64_FORMAT " frees (" UINT64_FORMAT "MB), " UINT64_FORMAT "MB resrc",
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num_mallocs(), alloc_bytes()/M, num_frees(), free_bytes()/M, resource_bytes()/M);
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}
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ReallocMark::ReallocMark() {
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#ifdef ASSERT
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Thread *thread = Thread::current();
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_nesting = thread->resource_area()->nesting();
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#endif
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}
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void ReallocMark::check() {
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#ifdef ASSERT
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if (_nesting != Thread::current()->resource_area()->nesting()) {
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fatal("allocation bug: array could grow within nested ResourceMark");
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}
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#endif
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}
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#endif // Non-product
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