Mercurial > jdk8-mips64-public > hotspot / annotate
src/cpu/sparc/vm/runtime_sparc.cpp@ac637b7220d1 (annotated)
src/cpu/sparc/vm/runtime_sparc.cpp
Tue, 30 Nov 2010 23:23:40 -0800
- author
- iveresov
- date
- Tue, 30 Nov 2010 23:23:40 -0800
- changeset 2344
- ac637b7220d1
- parent 2314
- f95d63e2154a
- child 2950
- cba7b5c2d53f
- permissions
- -rw-r--r--
6985015: C1 needs to support compressed oops
Summary: This change implements compressed oops for C1 for x64 and sparc. The changes are mostly on the codegen level, with a few exceptions when we do access things outside of the heap that are uncompressed from the IR. Compressed oops are now also enabled with tiered.
Reviewed-by: twisti, kvn, never, phh
| duke@435 | 1 | /* |
| jrose@1934 | 2 | * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #include "precompiled.hpp" |
| stefank@2314 | 26 | #ifdef COMPILER2 |
| stefank@2314 | 27 | #include "asm/assembler.hpp" |
| stefank@2314 | 28 | #include "assembler_sparc.inline.hpp" |
| stefank@2314 | 29 | #include "classfile/systemDictionary.hpp" |
| stefank@2314 | 30 | #include "code/vmreg.hpp" |
| stefank@2314 | 31 | #include "interpreter/interpreter.hpp" |
| stefank@2314 | 32 | #include "nativeInst_sparc.hpp" |
| stefank@2314 | 33 | #include "opto/runtime.hpp" |
| stefank@2314 | 34 | #include "runtime/interfaceSupport.hpp" |
| stefank@2314 | 35 | #include "runtime/sharedRuntime.hpp" |
| stefank@2314 | 36 | #include "runtime/stubRoutines.hpp" |
| stefank@2314 | 37 | #include "runtime/vframeArray.hpp" |
| stefank@2314 | 38 | #include "utilities/globalDefinitions.hpp" |
| stefank@2314 | 39 | #include "vmreg_sparc.inline.hpp" |
| stefank@2314 | 40 | #endif |
| duke@435 | 41 | |
| duke@435 | 42 | |
| duke@435 | 43 | #define __ masm-> |
| duke@435 | 44 | |
| duke@435 | 45 | ExceptionBlob *OptoRuntime::_exception_blob; |
| duke@435 | 46 | |
| duke@435 | 47 | //------------------------------ generate_exception_blob --------------------------- |
| duke@435 | 48 | // creates exception blob at the end |
| duke@435 | 49 | // Using exception blob, this code is jumped from a compiled method. |
| duke@435 | 50 | // (see emit_exception_handler in sparc.ad file) |
| duke@435 | 51 | // |
| duke@435 | 52 | // Given an exception pc at a call we call into the runtime for the |
| duke@435 | 53 | // handler in this method. This handler might merely restore state |
| duke@435 | 54 | // (i.e. callee save registers) unwind the frame and jump to the |
| duke@435 | 55 | // exception handler for the nmethod if there is no Java level handler |
| duke@435 | 56 | // for the nmethod. |
| duke@435 | 57 | // |
| duke@435 | 58 | // This code is entered with a jmp. |
| duke@435 | 59 | // |
| duke@435 | 60 | // Arguments: |
| duke@435 | 61 | // O0: exception oop |
| duke@435 | 62 | // O1: exception pc |
| duke@435 | 63 | // |
| duke@435 | 64 | // Results: |
| duke@435 | 65 | // O0: exception oop |
| duke@435 | 66 | // O1: exception pc in caller or ??? |
| duke@435 | 67 | // destination: exception handler of caller |
| duke@435 | 68 | // |
| duke@435 | 69 | // Note: the exception pc MUST be at a call (precise debug information) |
| duke@435 | 70 | // |
| duke@435 | 71 | void OptoRuntime::generate_exception_blob() { |
| duke@435 | 72 | // allocate space for code |
| duke@435 | 73 | ResourceMark rm; |
| duke@435 | 74 | int pad = VerifyThread ? 256 : 0;// Extra slop space for more verify code |
| duke@435 | 75 | |
| duke@435 | 76 | // setup code generation tools |
| duke@435 | 77 | // Measured 8/7/03 at 256 in 32bit debug build (no VerifyThread) |
| duke@435 | 78 | // Measured 8/7/03 at 528 in 32bit debug build (VerifyThread) |
| duke@435 | 79 | CodeBuffer buffer("exception_blob", 600+pad, 512); |
| duke@435 | 80 | MacroAssembler* masm = new MacroAssembler(&buffer); |
| duke@435 | 81 | |
| duke@435 | 82 | int framesize_in_bytes = __ total_frame_size_in_bytes(0); |
| duke@435 | 83 | int framesize_in_words = framesize_in_bytes / wordSize; |
| duke@435 | 84 | int framesize_in_slots = framesize_in_bytes / sizeof(jint); |
| duke@435 | 85 | |
| duke@435 | 86 | Label L; |
| duke@435 | 87 | |
| duke@435 | 88 | int start = __ offset(); |
| duke@435 | 89 | |
| duke@435 | 90 | __ verify_thread(); |
| twisti@1162 | 91 | __ st_ptr(Oexception, G2_thread, JavaThread::exception_oop_offset()); |
| twisti@1162 | 92 | __ st_ptr(Oissuing_pc, G2_thread, JavaThread::exception_pc_offset()); |
| duke@435 | 93 | |
| duke@435 | 94 | // This call does all the hard work. It checks if an exception catch |
| duke@435 | 95 | // exists in the method. |
| duke@435 | 96 | // If so, it returns the handler address. |
| duke@435 | 97 | // If the nmethod has been deoptimized and it had a handler the handler |
| duke@435 | 98 | // address is the deopt blob unpack_with_exception entry. |
| duke@435 | 99 | // |
| duke@435 | 100 | // If no handler exists it prepares for stack-unwinding, restoring the callee-save |
| duke@435 | 101 | // registers of the frame being removed. |
| duke@435 | 102 | // |
| duke@435 | 103 | __ save_frame(0); |
| duke@435 | 104 | |
| duke@435 | 105 | __ mov(G2_thread, O0); |
| duke@435 | 106 | __ set_last_Java_frame(SP, noreg); |
| duke@435 | 107 | __ save_thread(L7_thread_cache); |
| duke@435 | 108 | |
| duke@435 | 109 | // This call can block at exit and nmethod can be deoptimized at that |
| duke@435 | 110 | // point. If the nmethod had a catch point we would jump to the |
| duke@435 | 111 | // now deoptimized catch point and fall thru the vanilla deopt |
| duke@435 | 112 | // path and lose the exception |
| duke@435 | 113 | // Sure would be simpler if this call didn't block! |
| duke@435 | 114 | __ call(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C), relocInfo::runtime_call_type); |
| duke@435 | 115 | __ delayed()->mov(L7_thread_cache, O0); |
| duke@435 | 116 | |
| duke@435 | 117 | // Set an oopmap for the call site. This oopmap will only be used if we |
| duke@435 | 118 | // are unwinding the stack. Hence, all locations will be dead. |
| duke@435 | 119 | // Callee-saved registers will be the same as the frame above (i.e., |
| duke@435 | 120 | // handle_exception_stub), since they were restored when we got the |
| duke@435 | 121 | // exception. |
| duke@435 | 122 | |
| duke@435 | 123 | OopMapSet *oop_maps = new OopMapSet(); |
| duke@435 | 124 | oop_maps->add_gc_map( __ offset()-start, new OopMap(framesize_in_slots, 0)); |
| duke@435 | 125 | |
| duke@435 | 126 | __ bind(L); |
| duke@435 | 127 | __ restore_thread(L7_thread_cache); |
| duke@435 | 128 | __ reset_last_Java_frame(); |
| duke@435 | 129 | |
| duke@435 | 130 | __ mov(O0, G3_scratch); // Move handler address to temp |
| duke@435 | 131 | __ restore(); |
| duke@435 | 132 | |
| twisti@1922 | 133 | // Restore SP from L7 if the exception PC is a MethodHandle call site. |
| twisti@1922 | 134 | __ lduw(Address(G2_thread, JavaThread::is_method_handle_return_offset()), O7); |
| twisti@1922 | 135 | __ tst(O7); |
| twisti@1922 | 136 | __ movcc(Assembler::notZero, false, Assembler::icc, L7_mh_SP_save, SP); |
| twisti@1922 | 137 | |
| duke@435 | 138 | // G3_scratch contains handler address |
| duke@435 | 139 | // Since this may be the deopt blob we must set O7 to look like we returned |
| duke@435 | 140 | // from the original pc that threw the exception |
| duke@435 | 141 | |
| twisti@1162 | 142 | __ ld_ptr(G2_thread, JavaThread::exception_pc_offset(), O7); |
| duke@435 | 143 | __ sub(O7, frame::pc_return_offset, O7); |
| duke@435 | 144 | |
| duke@435 | 145 | |
| duke@435 | 146 | assert(Assembler::is_simm13(in_bytes(JavaThread::exception_oop_offset())), "exception offset overflows simm13, following ld instruction cannot be in delay slot"); |
| twisti@1162 | 147 | __ ld_ptr(G2_thread, JavaThread::exception_oop_offset(), Oexception); // O0 |
| duke@435 | 148 | #ifdef ASSERT |
| twisti@1162 | 149 | __ st_ptr(G0, G2_thread, JavaThread::exception_handler_pc_offset()); |
| twisti@1162 | 150 | __ st_ptr(G0, G2_thread, JavaThread::exception_pc_offset()); |
| duke@435 | 151 | #endif |
| duke@435 | 152 | __ JMP(G3_scratch, 0); |
| duke@435 | 153 | // Clear the exception oop so GC no longer processes it as a root. |
| twisti@1162 | 154 | __ delayed()->st_ptr(G0, G2_thread, JavaThread::exception_oop_offset()); |
| duke@435 | 155 | |
| duke@435 | 156 | // ------------- |
| duke@435 | 157 | // make sure all code is generated |
| duke@435 | 158 | masm->flush(); |
| duke@435 | 159 | |
| duke@435 | 160 | _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize_in_words); |
| duke@435 | 161 | } |
