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