Thu, 24 May 2018 19:49:50 +0800
some C1 fix
Contributed-by: chenhaoxuan, zhaixiang, aoqi
aoqi@1 | 1 | /* |
aoqi@1 | 2 | * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved. |
aoqi@1 | 3 | * Copyright (c) 2015, 2016, Loongson Technology. All rights reserved. |
aoqi@1 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@1 | 5 | * |
aoqi@1 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@1 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@1 | 8 | * published by the Free Software Foundation. |
aoqi@1 | 9 | * |
aoqi@1 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@1 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@1 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@1 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@1 | 14 | * accompanied this code). |
aoqi@1 | 15 | * |
aoqi@1 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@1 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@1 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@1 | 19 | * |
aoqi@1 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@1 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@1 | 22 | * questions. |
aoqi@1 | 23 | * |
aoqi@1 | 24 | */ |
aoqi@1 | 25 | |
aoqi@1 | 26 | #include "precompiled.hpp" |
aoqi@1 | 27 | #ifdef COMPILER2 |
aoqi@1 | 28 | #include "asm/macroAssembler.hpp" |
aoqi@1 | 29 | #include "asm/macroAssembler.inline.hpp" |
aoqi@1 | 30 | #include "classfile/systemDictionary.hpp" |
aoqi@1 | 31 | #include "code/vmreg.hpp" |
aoqi@1 | 32 | #include "interpreter/interpreter.hpp" |
aoqi@1 | 33 | #include "opto/runtime.hpp" |
aoqi@1 | 34 | #include "runtime/interfaceSupport.hpp" |
aoqi@1 | 35 | #include "runtime/sharedRuntime.hpp" |
aoqi@1 | 36 | #include "runtime/stubRoutines.hpp" |
aoqi@1 | 37 | #include "runtime/vframeArray.hpp" |
aoqi@1 | 38 | #include "utilities/globalDefinitions.hpp" |
aoqi@1 | 39 | #include "vmreg_mips.inline.hpp" |
aoqi@1 | 40 | #endif |
aoqi@1 | 41 | |
aoqi@1 | 42 | #define __ masm-> |
aoqi@1 | 43 | |
aoqi@1 | 44 | //-------------- generate_exception_blob ----------- |
aoqi@1 | 45 | // creates _exception_blob. |
aoqi@1 | 46 | // The exception blob is jumped to from a compiled method. |
aoqi@1 | 47 | // (see emit_exception_handler in sparc.ad file) |
aoqi@6880 | 48 | // |
aoqi@1 | 49 | // Given an exception pc at a call we call into the runtime for the |
aoqi@1 | 50 | // handler in this method. This handler might merely restore state |
aoqi@1 | 51 | // (i.e. callee save registers) unwind the frame and jump to the |
aoqi@1 | 52 | // exception handler for the nmethod if there is no Java level handler |
aoqi@1 | 53 | // for the nmethod. |
aoqi@1 | 54 | // |
aoqi@1 | 55 | // This code is entered with a jump, and left with a jump. |
aoqi@6880 | 56 | // |
aoqi@1 | 57 | // Arguments: |
aoqi@1 | 58 | // V0: exception oop |
aoqi@1 | 59 | // V1: exception pc |
aoqi@1 | 60 | // |
aoqi@1 | 61 | // Results: |
aoqi@1 | 62 | // A0: exception oop |
aoqi@1 | 63 | // A1: exception pc in caller or ??? |
aoqi@1 | 64 | // jumps to: exception handler of caller |
aoqi@6880 | 65 | // |
aoqi@1 | 66 | // Note: the exception pc MUST be at a call (precise debug information) |
aoqi@1 | 67 | // |
aoqi@1 | 68 | // 2012/9/14 Jin: [stubGenerator_mips.cpp] generate_forward_exception() |
aoqi@1 | 69 | // |- V0, V1 are created |
aoqi@1 | 70 | // |- T9 <= SharedRuntime::exception_handler_for_return_address |
aoqi@1 | 71 | // `- jr T9 |
aoqi@1 | 72 | // `- the caller's exception_handler |
aoqi@1 | 73 | // `- jr OptoRuntime::exception_blob |
aoqi@1 | 74 | // `- here |
aoqi@1 | 75 | // |
aoqi@1 | 76 | void OptoRuntime::generate_exception_blob() { |
aoqi@1 | 77 | // Capture info about frame layout |
aoqi@1 | 78 | enum layout { |
aoqi@1 | 79 | fp_off, |
aoqi@1 | 80 | return_off, // slot for return address |
aoqi@1 | 81 | framesize |
aoqi@1 | 82 | }; |
aoqi@1 | 83 | |
aoqi@1 | 84 | // allocate space for the code |
aoqi@1 | 85 | ResourceMark rm; |
aoqi@1 | 86 | // setup code generation tools |
aoqi@1 | 87 | CodeBuffer buffer("exception_blob", 5120, 5120); |
aoqi@1 | 88 | MacroAssembler* masm = new MacroAssembler(&buffer); |
aoqi@1 | 89 | |
aoqi@1 | 90 | |
aoqi@1 | 91 | address start = __ pc(); |
aoqi@1 | 92 | |
aoqi@1 | 93 | __ daddiu(SP, SP, -1 * framesize * wordSize); // Prolog! |
aoqi@1 | 94 | |
aoqi@1 | 95 | /* 2012/9.27 Jin: this frame will be treated as the original caller method. |
aoqi@1 | 96 | * So, the return pc should be filled with the original exception pc. |
aoqi@1 | 97 | * ref: X86's implementation |
aoqi@1 | 98 | */ |
aoqi@6880 | 99 | __ sd(V1, SP, return_off *wordSize); // return address |
aoqi@6880 | 100 | __ sd(FP, SP, fp_off *wordSize); // EBP |
aoqi@1 | 101 | |
aoqi@6880 | 102 | // Save callee saved registers. None for UseSSE=0, |
aoqi@1 | 103 | // floats-only for UseSSE=1, and doubles for UseSSE=2. |
aoqi@1 | 104 | |
aoqi@1 | 105 | __ daddiu(FP, SP, fp_off * wordSize); |
aoqi@1 | 106 | |
aoqi@1 | 107 | // Store exception in Thread object. We cannot pass any arguments to the |
aoqi@1 | 108 | // handle_exception call, since we do not want to make any assumption |
aoqi@1 | 109 | // about the size of the frame where the exception happened in. |
aoqi@1 | 110 | Register thread = TREG; |
aoqi@1 | 111 | |
aoqi@1 | 112 | #ifndef OPT_THREAD |
aoqi@1 | 113 | __ get_thread(thread); |
aoqi@1 | 114 | #endif |
aoqi@1 | 115 | |
aoqi@1 | 116 | __ sd(V0, Address(thread, JavaThread::exception_oop_offset())); |
aoqi@1 | 117 | __ sd(V1, Address(thread, JavaThread::exception_pc_offset())); |
aoqi@1 | 118 | |
aoqi@1 | 119 | // This call does all the hard work. It checks if an exception handler |
aoqi@1 | 120 | // exists in the method. |
aoqi@1 | 121 | // If so, it returns the handler address. |
aoqi@1 | 122 | // If not, it prepares for stack-unwinding, restoring the callee-save |
aoqi@1 | 123 | // registers of the frame being removed. |
aoqi@1 | 124 | __ set_last_Java_frame(thread, NOREG, NOREG, NULL); |
aoqi@1 | 125 | |
aoqi@1 | 126 | __ move(AT, -(StackAlignmentInBytes)); |
aoqi@1 | 127 | __ andr(SP, SP, AT); // Fix stack alignment as required by ABI |
aoqi@1 | 128 | |
aoqi@1 | 129 | __ relocate(relocInfo::internal_pc_type); |
aoqi@1 | 130 | |
aoqi@1 | 131 | { |
fujie@373 | 132 | long save_pc = (long)__ pc() + 48; |
fujie@368 | 133 | __ patchable_set48(AT, save_pc); |
aoqi@1 | 134 | } |
aoqi@1 | 135 | __ sd(AT, thread, in_bytes(JavaThread::last_Java_pc_offset())); |
aoqi@1 | 136 | |
aoqi@1 | 137 | __ move(A0, thread); |
fujie@373 | 138 | __ patchable_set48(T9, (long)OptoRuntime::handle_exception_C); |
aoqi@1 | 139 | __ jalr(T9); |
aoqi@1 | 140 | __ delayed()->nop(); |
aoqi@1 | 141 | |
aoqi@1 | 142 | // Set an oopmap for the call site |
aoqi@1 | 143 | OopMapSet *oop_maps = new OopMapSet(); |
aoqi@1 | 144 | OopMap* map = new OopMap( framesize, 0 ); |
aoqi@1 | 145 | |
aoqi@1 | 146 | oop_maps->add_gc_map( __ offset(), map); |
aoqi@1 | 147 | |
aoqi@1 | 148 | #ifndef OPT_THREAD |
aoqi@1 | 149 | __ get_thread(thread); |
aoqi@1 | 150 | #endif |
aoqi@1 | 151 | __ reset_last_Java_frame(thread, true, true); |
aoqi@1 | 152 | |
aoqi@1 | 153 | // Pop self-frame. |
aoqi@1 | 154 | __ leave(); // Epilog! |
aoqi@1 | 155 | |
aoqi@8865 | 156 | // V0: exception handler |
aoqi@1 | 157 | |
aoqi@8865 | 158 | // We have a handler in V0, (could be deopt blob) |
aoqi@1 | 159 | __ move(T9, V0); |
aoqi@1 | 160 | |
aoqi@1 | 161 | #ifndef OPT_THREAD |
aoqi@1 | 162 | __ get_thread(thread); |
aoqi@1 | 163 | #endif |
aoqi@1 | 164 | // Get the exception |
aoqi@1 | 165 | __ ld(A0, Address(thread, JavaThread::exception_oop_offset())); |
aoqi@1 | 166 | // Get the exception pc in case we are deoptimized |
aoqi@1 | 167 | __ ld(A1, Address(thread, JavaThread::exception_pc_offset())); |
aoqi@1 | 168 | #ifdef ASSERT |
aoqi@1 | 169 | __ sd(R0, Address(thread, JavaThread::exception_handler_pc_offset())); |
aoqi@1 | 170 | __ sd(R0, Address(thread, JavaThread::exception_pc_offset())); |
aoqi@1 | 171 | #endif |
aoqi@1 | 172 | // Clear the exception oop so GC no longer processes it as a root. |
aoqi@1 | 173 | __ sd(R0, Address(thread, JavaThread::exception_oop_offset())); |
aoqi@1 | 174 | |
aoqi@1 | 175 | /* 2014/5/12 Jin: Fix seg fault when running: |
aoqi@1 | 176 | * Eclipse + Plugin + Debug As |
aoqi@1 | 177 | * This is the only condition where C2 calls SharedRuntime::generate_deopt_blob() |
aoqi@1 | 178 | * |
aoqi@1 | 179 | * Ref: http://10.2.5.21:8000/projects/java/wiki/Jgj-log-2014-5-12_ |
aoqi@1 | 180 | */ |
aoqi@1 | 181 | __ move(V0, A0); |
aoqi@1 | 182 | __ move(V1, A1); |
aoqi@1 | 183 | |
aoqi@1 | 184 | // rax,: exception oop |
aoqi@1 | 185 | // rcx: exception handler |
aoqi@1 | 186 | // rdx: exception pc |
aoqi@1 | 187 | __ jr(T9); |
aoqi@1 | 188 | __ delayed()->nop(); |
aoqi@1 | 189 | |
aoqi@1 | 190 | // make sure all code is generated |
aoqi@1 | 191 | masm->flush(); |
aoqi@1 | 192 | |
aoqi@1 | 193 | _exception_blob = ExceptionBlob::create(&buffer, oop_maps, framesize); |
aoqi@1 | 194 | } |