Mercurial > hg > graal-compiler
annotate src/cpu/sparc/vm/metaspaceShared_sparc.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
| author | coleenp |
|---|---|
| date | Sat, 01 Sep 2012 13:25:18 -0400 |
| parents | src/cpu/sparc/vm/dump_sparc.cpp@1d1603768966 |
| children | f0c2369fda5a |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 2004, 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 "assembler_sparc.inline.hpp" | |
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27 #include "memory/metaspaceShared.hpp" |
| 0 | 28 |
| 29 // Generate the self-patching vtable method: | |
| 30 // | |
| 31 // This method will be called (as any other Klass virtual method) with | |
| 32 // the Klass itself as the first argument. Example: | |
| 33 // | |
| 34 // oop obj; | |
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35 // int size = obj->klass()->oop_size(this); |
| 0 | 36 // |
| 37 // for which the virtual method call is Klass::oop_size(); | |
| 38 // | |
| 39 // The dummy method is called with the Klass object as the first | |
| 40 // operand, and an object as the second argument. | |
| 41 // | |
| 42 | |
| 43 //===================================================================== | |
| 44 | |
| 45 // All of the dummy methods in the vtable are essentially identical, | |
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46 // differing only by an ordinal constant, and they bear no relationship |
| 0 | 47 // to the original method which the caller intended. Also, there needs |
| 48 // to be 'vtbl_list_size' instances of the vtable in order to | |
| 49 // differentiate between the 'vtable_list_size' original Klass objects. | |
| 50 | |
| 51 #define __ masm-> | |
| 52 | |
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53 void MetaspaceShared::generate_vtable_methods(void** vtbl_list, |
| 0 | 54 void** vtable, |
| 55 char** md_top, | |
| 56 char* md_end, | |
| 57 char** mc_top, | |
| 58 char* mc_end) { | |
| 59 | |
| 60 intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); | |
| 61 *(intptr_t *)(*md_top) = vtable_bytes; | |
| 62 *md_top += sizeof(intptr_t); | |
| 63 void** dummy_vtable = (void**)*md_top; | |
| 64 *vtable = dummy_vtable; | |
| 65 *md_top += vtable_bytes; | |
| 66 | |
| 67 guarantee(*md_top <= md_end, "Insufficient space for vtables."); | |
| 68 | |
| 69 // Get ready to generate dummy methods. | |
| 70 | |
| 71 CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); | |
| 72 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 73 | |
| 74 Label common_code; | |
| 75 for (int i = 0; i < vtbl_list_size; ++i) { | |
| 76 for (int j = 0; j < num_virtuals; ++j) { | |
| 77 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); | |
| 78 __ save(SP, -256, SP); | |
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79 int offset = (i << 8) + j; |
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80 Register src = G0; |
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81 if (!Assembler::is_simm13(offset)) { |
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82 __ sethi(offset, L0); |
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83 src = L0; |
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84 offset = offset & ((1 << 10) - 1); |
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85 } |
| 0 | 86 __ brx(Assembler::always, false, Assembler::pt, common_code); |
| 87 | |
| 88 // Load L0 with a value indicating vtable/offset pair. | |
| 89 // -- bits[ 7..0] (8 bits) which virtual method in table? | |
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90 // -- bits[13..8] (6 bits) which virtual method table? |
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91 __ delayed()->or3(src, offset, L0); |
| 0 | 92 } |
| 93 } | |
| 94 | |
| 95 __ bind(common_code); | |
| 96 | |
| 97 // Expecting to be called with the "this" pointer in O0/I0 (where | |
| 98 // "this" is a Klass object). In addition, L0 was set (above) to | |
| 99 // identify the method and table. | |
| 100 | |
| 101 // Look up the correct vtable pointer. | |
| 102 | |
| 103 __ set((intptr_t)vtbl_list, L2); // L2 = address of new vtable list. | |
| 104 __ srl(L0, 8, L3); // Isolate L3 = vtable identifier. | |
| 105 __ sll(L3, LogBytesPerWord, L3); | |
| 106 __ ld_ptr(L2, L3, L3); // L3 = new (correct) vtable pointer. | |
| 107 __ st_ptr(L3, Address(I0, 0)); // Save correct vtable ptr in entry. | |
| 108 | |
| 109 // Restore registers and jump to the correct method; | |
| 110 | |
| 111 __ and3(L0, 255, L4); // Isolate L3 = method offset;. | |
| 112 __ sll(L4, LogBytesPerWord, L4); | |
| 113 __ ld_ptr(L3, L4, L4); // Get address of correct virtual method | |
| 727 | 114 __ jmpl(L4, 0, G0); // Jump to correct method. |
| 0 | 115 __ delayed()->restore(); // Restore registers. |
| 116 | |
| 117 __ flush(); | |
| 118 *mc_top = (char*)__ pc(); | |
| 119 | |
| 120 guarantee(*mc_top <= mc_end, "Insufficient space for method wrappers."); | |
| 121 } |