Mercurial > hg > truffle
annotate src/share/vm/code/vtableStubs.cpp @ 1748:3e8fbc61cee8
6978355: renaming for 6961697
Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Wed, 25 Aug 2010 05:27:54 -0700 |
| parents | 126ea7725993 |
| children | f95d63e2154a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_vtableStubs.cpp.incl" | |
| 27 | |
| 28 // ----------------------------------------------------------------------------------------- | |
| 29 // Implementation of VtableStub | |
| 30 | |
| 31 address VtableStub::_chunk = NULL; | |
| 32 address VtableStub::_chunk_end = NULL; | |
| 33 VMReg VtableStub::_receiver_location = VMRegImpl::Bad(); | |
| 34 | |
| 35 static int num_vtable_chunks = 0; | |
| 36 | |
| 37 | |
| 38 void* VtableStub::operator new(size_t size, int code_size) { | |
| 39 assert(size == sizeof(VtableStub), "mismatched size"); | |
| 40 num_vtable_chunks++; | |
| 41 // compute real VtableStub size (rounded to nearest word) | |
| 42 const int real_size = round_to(code_size + sizeof(VtableStub), wordSize); | |
| 43 // malloc them in chunks to minimize header overhead | |
| 44 const int chunk_factor = 32; | |
| 45 if (_chunk == NULL || _chunk + real_size > _chunk_end) { | |
| 46 const int bytes = chunk_factor * real_size + pd_code_alignment(); | |
| 47 BufferBlob* blob = BufferBlob::create("vtable chunks", bytes); | |
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48 if (blob == NULL) { |
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49 vm_exit_out_of_memory(bytes, "CodeCache: no room for vtable chunks"); |
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50 } |
| 1748 | 51 _chunk = blob->content_begin(); |
| 0 | 52 _chunk_end = _chunk + bytes; |
| 53 Forte::register_stub("vtable stub", _chunk, _chunk_end); | |
| 54 // Notify JVMTI about this stub. The event will be recorded by the enclosing | |
| 55 // JvmtiDynamicCodeEventCollector and posted when this thread has released | |
| 56 // all locks. | |
| 57 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
| 58 JvmtiExport::post_dynamic_code_generated_while_holding_locks("vtable stub", _chunk, _chunk_end); | |
| 59 } | |
| 60 align_chunk(); | |
| 61 } | |
| 62 assert(_chunk + real_size <= _chunk_end, "bad allocation"); | |
| 63 void* res = _chunk; | |
| 64 _chunk += real_size; | |
| 65 align_chunk(); | |
| 66 return res; | |
| 67 } | |
| 68 | |
| 69 | |
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70 void VtableStub::print_on(outputStream* st) const { |
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71 st->print("vtable stub (index = %d, receiver_location = %d, code = [" INTPTR_FORMAT ", " INTPTR_FORMAT "[)", |
| 0 | 72 index(), receiver_location(), code_begin(), code_end()); |
| 73 } | |
| 74 | |
| 75 | |
| 76 // ----------------------------------------------------------------------------------------- | |
| 77 // Implementation of VtableStubs | |
| 78 // | |
| 79 // For each hash value there's a linked list of vtable stubs (with that | |
| 80 // hash value). Each list is anchored in a little hash _table, indexed | |
| 81 // by that hash value. | |
| 82 | |
| 83 VtableStub* VtableStubs::_table[VtableStubs::N]; | |
| 84 int VtableStubs::_number_of_vtable_stubs = 0; | |
| 85 | |
| 86 | |
| 87 void VtableStubs::initialize() { | |
| 88 VtableStub::_receiver_location = SharedRuntime::name_for_receiver(); | |
| 89 { | |
| 90 MutexLocker ml(VtableStubs_lock); | |
| 91 assert(_number_of_vtable_stubs == 0, "potential performance bug: VtableStubs initialized more than once"); | |
| 92 assert(is_power_of_2(N), "N must be a power of 2"); | |
| 93 for (int i = 0; i < N; i++) { | |
| 94 _table[i] = NULL; | |
| 95 } | |
| 96 } | |
| 97 } | |
| 98 | |
| 99 | |
| 100 address VtableStubs::create_stub(bool is_vtable_stub, int vtable_index, methodOop method) { | |
| 101 assert(vtable_index >= 0, "must be positive"); | |
| 102 | |
| 103 VtableStub* s = ShareVtableStubs ? lookup(is_vtable_stub, vtable_index) : NULL; | |
| 104 if (s == NULL) { | |
| 105 if (is_vtable_stub) { | |
| 106 s = create_vtable_stub(vtable_index); | |
| 107 } else { | |
| 108 s = create_itable_stub(vtable_index); | |
| 109 } | |
| 110 enter(is_vtable_stub, vtable_index, s); | |
| 111 if (PrintAdapterHandlers) { | |
| 112 tty->print_cr("Decoding VtableStub %s[%d]@%d", | |
| 113 is_vtable_stub? "vtbl": "itbl", vtable_index, VtableStub::receiver_location()); | |
| 114 Disassembler::decode(s->code_begin(), s->code_end()); | |
| 115 } | |
| 116 } | |
| 117 return s->entry_point(); | |
| 118 } | |
| 119 | |
| 120 | |
| 121 inline uint VtableStubs::hash(bool is_vtable_stub, int vtable_index){ | |
| 122 // Assumption: receiver_location < 4 in most cases. | |
| 123 int hash = ((vtable_index << 2) ^ VtableStub::receiver_location()->value()) + vtable_index; | |
| 124 return (is_vtable_stub ? ~hash : hash) & mask; | |
| 125 } | |
| 126 | |
| 127 | |
| 128 VtableStub* VtableStubs::lookup(bool is_vtable_stub, int vtable_index) { | |
| 129 MutexLocker ml(VtableStubs_lock); | |
| 130 unsigned hash = VtableStubs::hash(is_vtable_stub, vtable_index); | |
| 131 VtableStub* s = _table[hash]; | |
| 132 while( s && !s->matches(is_vtable_stub, vtable_index)) s = s->next(); | |
| 133 return s; | |
| 134 } | |
| 135 | |
| 136 | |
| 137 void VtableStubs::enter(bool is_vtable_stub, int vtable_index, VtableStub* s) { | |
| 138 MutexLocker ml(VtableStubs_lock); | |
| 139 assert(s->matches(is_vtable_stub, vtable_index), "bad vtable stub"); | |
| 140 unsigned int h = VtableStubs::hash(is_vtable_stub, vtable_index); | |
| 141 // enter s at the beginning of the corresponding list | |
| 142 s->set_next(_table[h]); | |
| 143 _table[h] = s; | |
| 144 _number_of_vtable_stubs++; | |
| 145 } | |
| 146 | |
| 147 | |
| 148 bool VtableStubs::is_entry_point(address pc) { | |
| 149 MutexLocker ml(VtableStubs_lock); | |
| 150 VtableStub* stub = (VtableStub*)(pc - VtableStub::entry_offset()); | |
| 151 uint hash = VtableStubs::hash(stub->is_vtable_stub(), stub->index()); | |
| 152 VtableStub* s; | |
| 153 for (s = _table[hash]; s != NULL && s != stub; s = s->next()) {} | |
| 154 return s == stub; | |
| 155 } | |
| 156 | |
| 157 | |
| 158 bool VtableStubs::contains(address pc) { | |
| 159 // simple solution for now - we may want to use | |
| 160 // a faster way if this function is called often | |
| 161 return stub_containing(pc) != NULL; | |
| 162 } | |
| 163 | |
| 164 | |
| 165 VtableStub* VtableStubs::stub_containing(address pc) { | |
| 166 // Note: No locking needed since any change to the data structure | |
| 167 // happens with an atomic store into it (we don't care about | |
| 168 // consistency with the _number_of_vtable_stubs counter). | |
| 169 for (int i = 0; i < N; i++) { | |
| 170 for (VtableStub* s = _table[i]; s != NULL; s = s->next()) { | |
| 171 if (s->contains(pc)) return s; | |
| 172 } | |
| 173 } | |
| 174 return NULL; | |
| 175 } | |
| 176 | |
| 177 void vtableStubs_init() { | |
| 178 VtableStubs::initialize(); | |
| 179 } | |
| 180 | |
| 181 | |
| 182 //----------------------------------------------------------------------------------------------------- | |
| 183 // Non-product code | |
| 184 #ifndef PRODUCT | |
| 185 | |
| 186 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oop receiver, int index) { | |
| 187 ResourceMark rm; | |
| 188 HandleMark hm; | |
| 189 klassOop klass = receiver->klass(); | |
| 190 instanceKlass* ik = instanceKlass::cast(klass); | |
| 191 klassVtable* vt = ik->vtable(); | |
| 192 klass->print(); | |
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193 fatal(err_msg("bad compiled vtable dispatch: receiver " INTPTR_FORMAT ", " |
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194 "index %d (vtable length %d)", |
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195 (address)receiver, index, vt->length())); |
| 0 | 196 } |
| 197 | |
| 198 #endif // Product |