Mercurial > hg > truffle
annotate src/share/vm/runtime/handles.cpp @ 12144:d8e99408faad
8009062: poor performance of JNI AttachCurrentThread after fix for 7017193
Summary: don't re-evaluate stack bounds for main thread before install guard page
Reviewed-by: coleenp, dholmes, dlong
| author | dsamersoff |
|---|---|
| date | Thu, 29 Aug 2013 21:48:23 +0400 |
| parents | f9be75d21404 |
| children | 9758d9f36299 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2012, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "memory/allocation.inline.hpp" | |
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27 #include "oops/constantPool.hpp" |
| 1972 | 28 #include "oops/oop.inline.hpp" |
| 29 #include "runtime/handles.inline.hpp" | |
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30 #include "runtime/thread.inline.hpp" |
| 1972 | 31 #ifdef TARGET_OS_FAMILY_linux |
| 32 # include "os_linux.inline.hpp" | |
| 33 #endif | |
| 34 #ifdef TARGET_OS_FAMILY_solaris | |
| 35 # include "os_solaris.inline.hpp" | |
| 36 #endif | |
| 37 #ifdef TARGET_OS_FAMILY_windows | |
| 38 # include "os_windows.inline.hpp" | |
| 39 #endif | |
| 3960 | 40 #ifdef TARGET_OS_FAMILY_bsd |
| 41 # include "os_bsd.inline.hpp" | |
| 42 #endif | |
| 0 | 43 |
| 44 #ifdef ASSERT | |
| 45 oop* HandleArea::allocate_handle(oop obj) { | |
| 46 assert(_handle_mark_nesting > 1, "memory leak: allocating handle outside HandleMark"); | |
| 47 assert(_no_handle_mark_nesting == 0, "allocating handle inside NoHandleMark"); | |
| 6867 | 48 assert(obj->is_oop(), "sanity check"); |
| 0 | 49 return real_allocate_handle(obj); |
| 50 } | |
| 51 | |
| 52 Handle::Handle(Thread* thread, oop obj) { | |
| 53 assert(thread == Thread::current(), "sanity check"); | |
| 54 if (obj == NULL) { | |
| 55 _handle = NULL; | |
| 56 } else { | |
| 57 _handle = thread->handle_area()->allocate_handle(obj); | |
| 58 } | |
| 59 } | |
| 60 | |
| 61 #endif | |
| 62 | |
| 63 static uintx chunk_oops_do(OopClosure* f, Chunk* chunk, char* chunk_top) { | |
| 64 oop* bottom = (oop*) chunk->bottom(); | |
| 65 oop* top = (oop*) chunk_top; | |
| 66 uintx handles_visited = top - bottom; | |
| 67 assert(top >= bottom && top <= (oop*) chunk->top(), "just checking"); | |
| 68 // during GC phase 3, a handle may be a forward pointer that | |
| 69 // is not yet valid, so loosen the assertion | |
| 70 while (bottom < top) { | |
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71 // This test can be moved up but for now check every oop. |
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72 |
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73 assert((*bottom)->is_oop(), "handle should point to oop"); |
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74 |
| 0 | 75 f->do_oop(bottom++); |
| 76 } | |
| 77 return handles_visited; | |
| 78 } | |
| 79 | |
| 80 // Used for debugging handle allocation. | |
| 81 NOT_PRODUCT(jint _nof_handlemarks = 0;) | |
| 82 | |
| 83 void HandleArea::oops_do(OopClosure* f) { | |
| 84 uintx handles_visited = 0; | |
| 85 // First handle the current chunk. It is filled to the high water mark. | |
| 86 handles_visited += chunk_oops_do(f, _chunk, _hwm); | |
| 87 // Then handle all previous chunks. They are completely filled. | |
| 88 Chunk* k = _first; | |
| 89 while(k != _chunk) { | |
| 90 handles_visited += chunk_oops_do(f, k, k->top()); | |
| 91 k = k->next(); | |
| 92 } | |
| 93 | |
| 94 // The thread local handle areas should not get very large | |
| 95 if (TraceHandleAllocation && handles_visited > TotalHandleAllocationLimit) { | |
| 96 #ifdef ASSERT | |
| 97 warning("%d: Visited in HandleMark : %d", | |
| 98 _nof_handlemarks, handles_visited); | |
| 99 #else | |
| 100 warning("Visited in HandleMark : %d", handles_visited); | |
| 101 #endif | |
| 102 } | |
| 103 if (_prev != NULL) _prev->oops_do(f); | |
| 104 } | |
| 105 | |
| 106 void HandleMark::initialize(Thread* thread) { | |
| 107 _thread = thread; | |
| 108 // Save area | |
| 109 _area = thread->handle_area(); | |
| 110 // Save current top | |
| 111 _chunk = _area->_chunk; | |
| 112 _hwm = _area->_hwm; | |
| 113 _max = _area->_max; | |
| 6197 | 114 _size_in_bytes = _area->_size_in_bytes; |
| 0 | 115 debug_only(_area->_handle_mark_nesting++); |
| 116 assert(_area->_handle_mark_nesting > 0, "must stack allocate HandleMarks"); | |
| 117 debug_only(Atomic::inc(&_nof_handlemarks);) | |
| 118 | |
| 119 // Link this in the thread | |
| 120 set_previous_handle_mark(thread->last_handle_mark()); | |
| 121 thread->set_last_handle_mark(this); | |
| 122 } | |
| 123 | |
| 124 | |
| 125 HandleMark::~HandleMark() { | |
| 126 HandleArea* area = _area; // help compilers with poor alias analysis | |
| 127 assert(area == _thread->handle_area(), "sanity check"); | |
| 128 assert(area->_handle_mark_nesting > 0, "must stack allocate HandleMarks" ); | |
| 129 debug_only(area->_handle_mark_nesting--); | |
| 130 | |
| 131 // Debug code to trace the number of handles allocated per mark/ | |
| 132 #ifdef ASSERT | |
| 133 if (TraceHandleAllocation) { | |
| 134 size_t handles = 0; | |
| 135 Chunk *c = _chunk->next(); | |
| 136 if (c == NULL) { | |
| 137 handles = area->_hwm - _hwm; // no new chunk allocated | |
| 138 } else { | |
| 139 handles = _max - _hwm; // add rest in first chunk | |
| 140 while(c != NULL) { | |
| 141 handles += c->length(); | |
| 142 c = c->next(); | |
| 143 } | |
| 144 handles -= area->_max - area->_hwm; // adjust for last trunk not full | |
| 145 } | |
| 146 handles /= sizeof(void *); // Adjust for size of a handle | |
| 147 if (handles > HandleAllocationLimit) { | |
| 148 // Note: _nof_handlemarks is only set in debug mode | |
| 149 warning("%d: Allocated in HandleMark : %d", _nof_handlemarks, handles); | |
| 150 } | |
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151 |
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152 tty->print_cr("Handles %d", handles); |
| 0 | 153 } |
| 154 #endif | |
| 155 | |
| 156 // Delete later chunks | |
| 157 if( _chunk->next() ) { | |
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158 // reset arena size before delete chunks. Otherwise, the total |
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159 // arena size could exceed total chunk size |
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160 assert(area->size_in_bytes() > size_in_bytes(), "Sanity check"); |
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161 area->set_size_in_bytes(size_in_bytes()); |
| 0 | 162 _chunk->next_chop(); |
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163 } else { |
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164 assert(area->size_in_bytes() == size_in_bytes(), "Sanity check"); |
| 0 | 165 } |
| 166 // Roll back arena to saved top markers | |
| 167 area->_chunk = _chunk; | |
| 168 area->_hwm = _hwm; | |
| 169 area->_max = _max; | |
| 170 #ifdef ASSERT | |
| 171 // clear out first chunk (to detect allocation bugs) | |
| 172 if (ZapVMHandleArea) { | |
| 173 memset(_hwm, badHandleValue, _max - _hwm); | |
| 174 } | |
| 175 Atomic::dec(&_nof_handlemarks); | |
| 176 #endif | |
| 177 | |
| 178 // Unlink this from the thread | |
| 179 _thread->set_last_handle_mark(previous_handle_mark()); | |
| 180 } | |
| 181 | |
| 10271 | 182 void* HandleMark::operator new(size_t size) { |
| 183 return AllocateHeap(size, mtThread); | |
| 184 } | |
| 185 | |
| 186 void* HandleMark::operator new [] (size_t size) { | |
| 187 return AllocateHeap(size, mtThread); | |
| 188 } | |
| 189 | |
| 190 void HandleMark::operator delete(void* p) { | |
| 191 FreeHeap(p, mtThread); | |
| 192 } | |
| 193 | |
| 194 void HandleMark::operator delete[](void* p) { | |
| 195 FreeHeap(p, mtThread); | |
| 196 } | |
| 197 | |
| 0 | 198 #ifdef ASSERT |
| 199 | |
| 200 NoHandleMark::NoHandleMark() { | |
| 201 HandleArea* area = Thread::current()->handle_area(); | |
| 202 area->_no_handle_mark_nesting++; | |
| 203 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
| 204 } | |
| 205 | |
| 206 | |
| 207 NoHandleMark::~NoHandleMark() { | |
| 208 HandleArea* area = Thread::current()->handle_area(); | |
| 209 assert(area->_no_handle_mark_nesting > 0, "must stack allocate NoHandleMark" ); | |
| 210 area->_no_handle_mark_nesting--; | |
| 211 } | |
| 212 | |
| 213 | |
| 214 ResetNoHandleMark::ResetNoHandleMark() { | |
| 215 HandleArea* area = Thread::current()->handle_area(); | |
| 216 _no_handle_mark_nesting = area->_no_handle_mark_nesting; | |
| 217 area->_no_handle_mark_nesting = 0; | |
| 218 } | |
| 219 | |
| 220 | |
| 221 ResetNoHandleMark::~ResetNoHandleMark() { | |
| 222 HandleArea* area = Thread::current()->handle_area(); | |
| 223 area->_no_handle_mark_nesting = _no_handle_mark_nesting; | |
| 224 } | |
| 225 | |
| 226 #endif |