Mercurial > hg > truffle
annotate src/cpu/x86/vm/c1_FpuStackSim_x86.hpp @ 17716:cdb71841f4bc
6498581: ThreadInterruptTest3 produces wrong output on Windows
Summary: There is race condition between os::interrupt and os::is_interrupted on Windows. In JVM_Sleep(Thread.sleep), check if thread gets interrupted, it may see interrupted but not really interrupted so cause spurious waking up (early return from sleep). Fix by checking if interrupt event really gets set thus prevent false return. For intrinsic of _isInterrupted, on Windows, go fastpath only on bit not set.
Reviewed-by: acorn, kvn
Contributed-by: david.holmes@oracle.com, yumin.qi@oracle.com
| author | minqi |
|---|---|
| date | Wed, 26 Feb 2014 15:20:41 -0800 |
| parents | f95d63e2154a |
| children |
| rev | line source |
|---|---|
| 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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6941466: Oracle rebranding changes for Hotspot repositories
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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 |