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annotate src/cpu/x86/vm/c1_FpuStackSim_x86.hpp @ 17947:1772223a25a2
8037112: gc/g1/TestHumongousAllocInitialMark.java caused SIGSEGV
Reviewed-by: brutisso, mgerdin
author | pliden |
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date | Fri, 11 Apr 2014 11:00:12 +0200 |
parents | f95d63e2154a |
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0 | 1 /* |
1972 | 2 * Copyright (c) 2005, 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 #ifndef CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |
26 #define CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP | |
27 | |
0 | 28 // Simulates the FPU stack and maintains mapping [fpu-register -> stack offset] |
29 // FPU registers are described as numbers from 0..nof_fpu_regs-1 | |
30 | |
31 class Compilation; | |
32 | |
33 class FpuStackSim VALUE_OBJ_CLASS_SPEC { | |
34 private: | |
35 Compilation* _compilation; | |
36 int _stack_size; | |
37 int _regs[FrameMap::nof_fpu_regs]; | |
38 | |
39 int tos_index() const { return _stack_size - 1; } | |
40 | |
41 int regs_at(int i) const; | |
42 void set_regs_at(int i, int val); | |
43 void dec_stack_size(); | |
44 void inc_stack_size(); | |
45 | |
46 // unified bailout support | |
47 Compilation* compilation() const { return _compilation; } | |
48 void bailout(const char* msg) const { compilation()->bailout(msg); } | |
49 bool bailed_out() const { return compilation()->bailed_out(); } | |
50 | |
51 public: | |
52 FpuStackSim(Compilation* compilation); | |
53 void pop (); | |
54 void pop (int rnr); // rnr must be on tos | |
55 void push(int rnr); | |
56 void swap(int offset); // exchange tos with tos + offset | |
57 int offset_from_tos(int rnr) const; // return the offset of the topmost instance of rnr from TOS | |
58 int get_slot(int tos_offset) const; // return the entry at the given offset from TOS | |
59 void set_slot(int tos_offset, int rnr); // set the entry at the given offset from TOS | |
60 void rename(int old_rnr, int new_rnr); // rename all instances of old_rnr to new_rnr | |
61 bool contains(int rnr); // debugging support only | |
62 bool is_empty(); | |
63 bool slot_is_empty(int tos_offset); | |
64 int stack_size() const { return _stack_size; } | |
65 void clear(); | |
66 intArray* write_state(); | |
67 void read_state(intArray* fpu_stack_state); | |
68 | |
69 void print() PRODUCT_RETURN; | |
70 }; | |
1972 | 71 |
72 #endif // CPU_X86_VM_C1_FPUSTACKSIM_X86_HPP |