Mercurial > hg > truffle
annotate src/cpu/x86/vm/metaspaceShared_x86_32.cpp @ 7212:291ffc492eb6
Merge with http://hg.openjdk.java.net/hsx/hsx25/hotspot/
| author | Doug Simon <doug.simon@oracle.com> |
|---|---|
| date | Fri, 14 Dec 2012 14:35:13 +0100 |
| parents | cd3d6a6b95d9 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
diff
changeset
|
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 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
337
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
337
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
337
diff
changeset
|
21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #include "precompiled.hpp" |
|
7199
cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
twisti
parents:
6725
diff
changeset
|
26 #include "asm/macroAssembler.hpp" |
|
cd3d6a6b95d9
8003240: x86: move MacroAssembler into separate file
twisti
parents:
6725
diff
changeset
|
27 #include "asm/codeBuffer.hpp" |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
diff
changeset
|
28 #include "memory/metaspaceShared.hpp" |
| 0 | 29 |
| 30 // Generate the self-patching vtable method: | |
| 31 // | |
| 32 // This method will be called (as any other Klass virtual method) with | |
| 33 // the Klass itself as the first argument. Example: | |
| 34 // | |
| 35 // oop obj; | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
diff
changeset
|
36 // int size = obj->klass()->oop_size(this); |
| 0 | 37 // |
| 38 // for which the virtual method call is Klass::oop_size(); | |
| 39 // | |
| 40 // The dummy method is called with the Klass object as the first | |
| 41 // operand, and an object as the second argument. | |
| 42 // | |
| 43 | |
| 44 //===================================================================== | |
| 45 | |
| 46 // All of the dummy methods in the vtable are essentially identical, | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
diff
changeset
|
47 // differing only by an ordinal constant, and they bear no relationship |
| 0 | 48 // to the original method which the caller intended. Also, there needs |
| 49 // to be 'vtbl_list_size' instances of the vtable in order to | |
| 50 // differentiate between the 'vtable_list_size' original Klass objects. | |
| 51 | |
| 52 #define __ masm-> | |
| 53 | |
|
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
1972
diff
changeset
|
54 void MetaspaceShared::generate_vtable_methods(void** vtbl_list, |
| 0 | 55 void** vtable, |
| 56 char** md_top, | |
| 57 char* md_end, | |
| 58 char** mc_top, | |
| 59 char* mc_end) { | |
| 60 | |
| 61 intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); | |
| 62 *(intptr_t *)(*md_top) = vtable_bytes; | |
| 63 *md_top += sizeof(intptr_t); | |
| 64 void** dummy_vtable = (void**)*md_top; | |
| 65 *vtable = dummy_vtable; | |
| 66 *md_top += vtable_bytes; | |
| 67 | |
| 68 // Get ready to generate dummy methods. | |
| 69 | |
| 70 CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); | |
| 71 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 72 | |
| 73 Label common_code; | |
| 74 for (int i = 0; i < vtbl_list_size; ++i) { | |
| 75 for (int j = 0; j < num_virtuals; ++j) { | |
| 76 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); | |
| 77 | |
| 78 // Load rax, with a value indicating vtable/offset pair. | |
| 79 // -- bits[ 7..0] (8 bits) which virtual method in table? | |
| 80 // -- bits[12..8] (5 bits) which virtual method table? | |
| 81 // -- must fit in 13-bit instruction immediate field. | |
| 82 __ movl(rax, (i << 8) + j); | |
| 83 __ jmp(common_code); | |
| 84 } | |
| 85 } | |
| 86 | |
| 87 __ bind(common_code); | |
| 88 | |
| 89 #ifdef WIN32 | |
| 90 // Expecting to be called with "thiscall" conventions -- the arguments | |
| 91 // are on the stack, except that the "this" pointer is in rcx. | |
| 92 #else | |
| 93 // Expecting to be called with Unix conventions -- the arguments | |
| 94 // are on the stack, including the "this" pointer. | |
| 95 #endif | |
| 96 | |
| 97 // In addition, rax was set (above) to the offset of the method in the | |
| 98 // table. | |
| 99 | |
| 100 #ifdef WIN32 | |
| 304 | 101 __ push(rcx); // save "this" |
| 0 | 102 #endif |
| 304 | 103 __ mov(rcx, rax); |
| 104 __ shrptr(rcx, 8); // isolate vtable identifier. | |
| 105 __ shlptr(rcx, LogBytesPerWord); | |
| 0 | 106 Address index(noreg, rcx, Address::times_1); |
| 107 ExternalAddress vtbl((address)vtbl_list); | |
| 108 __ movptr(rdx, ArrayAddress(vtbl, index)); // get correct vtable address. | |
| 109 #ifdef WIN32 | |
| 304 | 110 __ pop(rcx); // restore "this" |
| 0 | 111 #else |
| 304 | 112 __ movptr(rcx, Address(rsp, BytesPerWord)); // fetch "this" |
| 0 | 113 #endif |
| 304 | 114 __ movptr(Address(rcx, 0), rdx); // update vtable pointer. |
| 0 | 115 |
| 304 | 116 __ andptr(rax, 0x00ff); // isolate vtable method index |
| 117 __ shlptr(rax, LogBytesPerWord); | |
| 118 __ addptr(rax, rdx); // address of real method pointer. | |
| 0 | 119 __ jmp(Address(rax, 0)); // get real method pointer. |
| 120 | |
| 121 __ flush(); | |
| 122 | |
| 123 *mc_top = (char*)__ pc(); | |
| 124 } |