Mercurial > hg > truffle
annotate src/cpu/x86/vm/dump_x86_32.cpp @ 1972:f95d63e2154a
6989984: Use standard include model for Hospot
Summary: Replaced MakeDeps and the includeDB files with more standardized solutions.
Reviewed-by: coleenp, kvn, kamg
| author | stefank |
|---|---|
| date | Tue, 23 Nov 2010 13:22:55 -0800 |
| parents | c18cbe5936b8 |
| children |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 1972 | 2 * Copyright (c) 2004, 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 | |
| 1972 | 25 #include "precompiled.hpp" |
| 26 #include "assembler_x86.inline.hpp" | |
| 27 #include "memory/compactingPermGenGen.hpp" | |
| 28 #include "memory/generation.inline.hpp" | |
| 29 #include "memory/space.inline.hpp" | |
| 0 | 30 |
| 31 | |
| 32 | |
| 33 // Generate the self-patching vtable method: | |
| 34 // | |
| 35 // This method will be called (as any other Klass virtual method) with | |
| 36 // the Klass itself as the first argument. Example: | |
| 37 // | |
| 38 // oop obj; | |
| 39 // int size = obj->klass()->klass_part()->oop_size(this); | |
| 40 // | |
| 41 // for which the virtual method call is Klass::oop_size(); | |
| 42 // | |
| 43 // The dummy method is called with the Klass object as the first | |
| 44 // operand, and an object as the second argument. | |
| 45 // | |
| 46 | |
| 47 //===================================================================== | |
| 48 | |
| 49 // All of the dummy methods in the vtable are essentially identical, | |
| 50 // differing only by an ordinal constant, and they bear no releationship | |
| 51 // to the original method which the caller intended. Also, there needs | |
| 52 // to be 'vtbl_list_size' instances of the vtable in order to | |
| 53 // differentiate between the 'vtable_list_size' original Klass objects. | |
| 54 | |
| 55 #define __ masm-> | |
| 56 | |
| 57 void CompactingPermGenGen::generate_vtable_methods(void** vtbl_list, | |
| 58 void** vtable, | |
| 59 char** md_top, | |
| 60 char* md_end, | |
| 61 char** mc_top, | |
| 62 char* mc_end) { | |
| 63 | |
| 64 intptr_t vtable_bytes = (num_virtuals * vtbl_list_size) * sizeof(void*); | |
| 65 *(intptr_t *)(*md_top) = vtable_bytes; | |
| 66 *md_top += sizeof(intptr_t); | |
| 67 void** dummy_vtable = (void**)*md_top; | |
| 68 *vtable = dummy_vtable; | |
| 69 *md_top += vtable_bytes; | |
| 70 | |
| 71 // Get ready to generate dummy methods. | |
| 72 | |
| 73 CodeBuffer cb((unsigned char*)*mc_top, mc_end - *mc_top); | |
| 74 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 75 | |
| 76 Label common_code; | |
| 77 for (int i = 0; i < vtbl_list_size; ++i) { | |
| 78 for (int j = 0; j < num_virtuals; ++j) { | |
| 79 dummy_vtable[num_virtuals * i + j] = (void*)masm->pc(); | |
| 80 | |
| 81 // Load rax, with a value indicating vtable/offset pair. | |
| 82 // -- bits[ 7..0] (8 bits) which virtual method in table? | |
| 83 // -- bits[12..8] (5 bits) which virtual method table? | |
| 84 // -- must fit in 13-bit instruction immediate field. | |
| 85 __ movl(rax, (i << 8) + j); | |
| 86 __ jmp(common_code); | |
| 87 } | |
| 88 } | |
| 89 | |
| 90 __ bind(common_code); | |
| 91 | |
| 92 #ifdef WIN32 | |
| 93 // Expecting to be called with "thiscall" conventions -- the arguments | |
| 94 // are on the stack, except that the "this" pointer is in rcx. | |
| 95 #else | |
| 96 // Expecting to be called with Unix conventions -- the arguments | |
| 97 // are on the stack, including the "this" pointer. | |
| 98 #endif | |
| 99 | |
| 100 // In addition, rax was set (above) to the offset of the method in the | |
| 101 // table. | |
| 102 | |
| 103 #ifdef WIN32 | |
| 304 | 104 __ push(rcx); // save "this" |
| 0 | 105 #endif |
| 304 | 106 __ mov(rcx, rax); |
| 107 __ shrptr(rcx, 8); // isolate vtable identifier. | |
| 108 __ shlptr(rcx, LogBytesPerWord); | |
| 0 | 109 Address index(noreg, rcx, Address::times_1); |
| 110 ExternalAddress vtbl((address)vtbl_list); | |
| 111 __ movptr(rdx, ArrayAddress(vtbl, index)); // get correct vtable address. | |
| 112 #ifdef WIN32 | |
| 304 | 113 __ pop(rcx); // restore "this" |
| 0 | 114 #else |
| 304 | 115 __ movptr(rcx, Address(rsp, BytesPerWord)); // fetch "this" |
| 0 | 116 #endif |
| 304 | 117 __ movptr(Address(rcx, 0), rdx); // update vtable pointer. |
| 0 | 118 |
| 304 | 119 __ andptr(rax, 0x00ff); // isolate vtable method index |
| 120 __ shlptr(rax, LogBytesPerWord); | |
| 121 __ addptr(rax, rdx); // address of real method pointer. | |
| 0 | 122 __ jmp(Address(rax, 0)); // get real method pointer. |
| 123 | |
| 124 __ flush(); | |
| 125 | |
| 126 *mc_top = (char*)__ pc(); | |
| 127 } |