Tue, 17 Oct 2017 12:58:25 +0800
merge
aoqi@0 | 1 | /* |
aoqi@0 | 2 | * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. |
aoqi@0 | 3 | * Copyright 2012, 2013 SAP AG. All rights reserved. |
aoqi@0 | 4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
aoqi@0 | 5 | * |
aoqi@0 | 6 | * This code is free software; you can redistribute it and/or modify it |
aoqi@0 | 7 | * under the terms of the GNU General Public License version 2 only, as |
aoqi@0 | 8 | * published by the Free Software Foundation. |
aoqi@0 | 9 | * |
aoqi@0 | 10 | * This code is distributed in the hope that it will be useful, but WITHOUT |
aoqi@0 | 11 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
aoqi@0 | 12 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
aoqi@0 | 13 | * version 2 for more details (a copy is included in the LICENSE file that |
aoqi@0 | 14 | * accompanied this code). |
aoqi@0 | 15 | * |
aoqi@0 | 16 | * You should have received a copy of the GNU General Public License version |
aoqi@0 | 17 | * 2 along with this work; if not, write to the Free Software Foundation, |
aoqi@0 | 18 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
aoqi@0 | 19 | * |
aoqi@0 | 20 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
aoqi@0 | 21 | * or visit www.oracle.com if you need additional information or have any |
aoqi@0 | 22 | * questions. |
aoqi@0 | 23 | * |
aoqi@0 | 24 | */ |
aoqi@0 | 25 | |
aoqi@0 | 26 | #include "precompiled.hpp" |
aoqi@0 | 27 | #ifdef COMPILER2 |
aoqi@0 | 28 | #include "asm/assembler.inline.hpp" |
aoqi@0 | 29 | #include "asm/macroAssembler.inline.hpp" |
aoqi@0 | 30 | #include "classfile/systemDictionary.hpp" |
aoqi@0 | 31 | #include "code/vmreg.hpp" |
aoqi@0 | 32 | #include "interpreter/interpreter.hpp" |
aoqi@0 | 33 | #include "nativeInst_ppc.hpp" |
aoqi@0 | 34 | #include "opto/runtime.hpp" |
aoqi@0 | 35 | #include "runtime/interfaceSupport.hpp" |
aoqi@0 | 36 | #include "runtime/sharedRuntime.hpp" |
aoqi@0 | 37 | #include "runtime/stubRoutines.hpp" |
aoqi@0 | 38 | #include "runtime/vframeArray.hpp" |
aoqi@0 | 39 | #include "utilities/globalDefinitions.hpp" |
aoqi@0 | 40 | #include "vmreg_ppc.inline.hpp" |
aoqi@0 | 41 | #endif |
aoqi@0 | 42 | |
aoqi@0 | 43 | #define __ masm-> |
aoqi@0 | 44 | |
aoqi@0 | 45 | |
aoqi@0 | 46 | #ifdef COMPILER2 |
aoqi@0 | 47 | |
aoqi@0 | 48 | // SP adjustment (must use unextended SP) for method handle call sites |
aoqi@0 | 49 | // during exception handling. |
aoqi@0 | 50 | static intptr_t adjust_SP_for_methodhandle_callsite(JavaThread *thread) { |
aoqi@0 | 51 | RegisterMap map(thread, false); |
aoqi@0 | 52 | // The frame constructor will do the correction for us (see frame::adjust_unextended_SP). |
aoqi@0 | 53 | frame mh_caller_frame = thread->last_frame().sender(&map); |
aoqi@0 | 54 | assert(mh_caller_frame.is_compiled_frame(), "Only may reach here for compiled MH call sites"); |
aoqi@0 | 55 | return (intptr_t) mh_caller_frame.unextended_sp(); |
aoqi@0 | 56 | } |
aoqi@0 | 57 | |
aoqi@0 | 58 | //------------------------------generate_exception_blob--------------------------- |
aoqi@0 | 59 | // Creates exception blob at the end. |
aoqi@0 | 60 | // Using exception blob, this code is jumped from a compiled method. |
aoqi@0 | 61 | // |
aoqi@0 | 62 | // Given an exception pc at a call we call into the runtime for the |
aoqi@0 | 63 | // handler in this method. This handler might merely restore state |
aoqi@0 | 64 | // (i.e. callee save registers) unwind the frame and jump to the |
aoqi@0 | 65 | // exception handler for the nmethod if there is no Java level handler |
aoqi@0 | 66 | // for the nmethod. |
aoqi@0 | 67 | // |
aoqi@0 | 68 | // This code is entered with a jmp. |
aoqi@0 | 69 | // |
aoqi@0 | 70 | // Arguments: |
aoqi@0 | 71 | // R3_ARG1: exception oop |
aoqi@0 | 72 | // R4_ARG2: exception pc |
aoqi@0 | 73 | // |
aoqi@0 | 74 | // Results: |
aoqi@0 | 75 | // R3_ARG1: exception oop |
aoqi@0 | 76 | // R4_ARG2: exception pc in caller |
aoqi@0 | 77 | // destination: exception handler of caller |
aoqi@0 | 78 | // |
aoqi@0 | 79 | // Note: the exception pc MUST be at a call (precise debug information) |
aoqi@0 | 80 | // |
aoqi@0 | 81 | void OptoRuntime::generate_exception_blob() { |
aoqi@0 | 82 | // Allocate space for the code. |
aoqi@0 | 83 | ResourceMark rm; |
aoqi@0 | 84 | // Setup code generation tools. |
aoqi@0 | 85 | CodeBuffer buffer("exception_blob", 2048, 1024); |
aoqi@0 | 86 | InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer); |
aoqi@0 | 87 | |
aoqi@0 | 88 | address start = __ pc(); |
aoqi@0 | 89 | |
aoqi@0 | 90 | int frame_size_in_bytes = frame::abi_reg_args_size; |
aoqi@0 | 91 | OopMap* map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); |
aoqi@0 | 92 | |
aoqi@0 | 93 | // Exception pc is 'return address' for stack walker. |
aoqi@0 | 94 | __ std(R4_ARG2/*exception pc*/, _abi(lr), R1_SP); |
aoqi@0 | 95 | |
aoqi@0 | 96 | // Store the exception in the Thread object. |
aoqi@0 | 97 | __ std(R3_ARG1/*exception oop*/, in_bytes(JavaThread::exception_oop_offset()), R16_thread); |
aoqi@0 | 98 | __ std(R4_ARG2/*exception pc*/, in_bytes(JavaThread::exception_pc_offset()), R16_thread); |
aoqi@0 | 99 | |
aoqi@0 | 100 | // Save callee-saved registers. |
aoqi@0 | 101 | // Push a C frame for the exception blob. It is needed for the C call later on. |
aoqi@0 | 102 | __ push_frame_reg_args(0, R11_scratch1); |
aoqi@0 | 103 | |
aoqi@0 | 104 | // This call does all the hard work. It checks if an exception handler |
aoqi@0 | 105 | // exists in the method. |
aoqi@0 | 106 | // If so, it returns the handler address. |
aoqi@0 | 107 | // If not, it prepares for stack-unwinding, restoring the callee-save |
aoqi@0 | 108 | // registers of the frame being removed. |
aoqi@0 | 109 | __ set_last_Java_frame(/*sp=*/R1_SP, noreg); |
aoqi@0 | 110 | |
aoqi@0 | 111 | __ mr(R3_ARG1, R16_thread); |
aoqi@0 | 112 | #if defined(ABI_ELFv2) |
aoqi@0 | 113 | __ call_c((address) OptoRuntime::handle_exception_C, relocInfo::none); |
aoqi@0 | 114 | #else |
aoqi@0 | 115 | __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, OptoRuntime::handle_exception_C), |
aoqi@0 | 116 | relocInfo::none); |
aoqi@0 | 117 | #endif |
aoqi@0 | 118 | address calls_return_pc = __ last_calls_return_pc(); |
aoqi@0 | 119 | # ifdef ASSERT |
aoqi@0 | 120 | __ cmpdi(CCR0, R3_RET, 0); |
aoqi@0 | 121 | __ asm_assert_ne("handle_exception_C must not return NULL", 0x601); |
aoqi@0 | 122 | # endif |
aoqi@0 | 123 | |
aoqi@0 | 124 | // Set an oopmap for the call site. This oopmap will only be used if we |
aoqi@0 | 125 | // are unwinding the stack. Hence, all locations will be dead. |
aoqi@0 | 126 | // Callee-saved registers will be the same as the frame above (i.e., |
aoqi@0 | 127 | // handle_exception_stub), since they were restored when we got the |
aoqi@0 | 128 | // exception. |
aoqi@0 | 129 | OopMapSet* oop_maps = new OopMapSet(); |
aoqi@0 | 130 | oop_maps->add_gc_map(calls_return_pc - start, map); |
aoqi@0 | 131 | |
aoqi@0 | 132 | // Get unextended_sp for method handle call sites. |
aoqi@0 | 133 | Label mh_callsite, mh_done; // Use a 2nd c call if it's a method handle call site. |
aoqi@0 | 134 | __ lwa(R4_ARG2, in_bytes(JavaThread::is_method_handle_return_offset()), R16_thread); |
aoqi@0 | 135 | __ cmpwi(CCR0, R4_ARG2, 0); |
aoqi@0 | 136 | __ bne(CCR0, mh_callsite); |
aoqi@0 | 137 | |
aoqi@0 | 138 | __ mtctr(R3_RET); // Move address of exception handler to SR_CTR. |
aoqi@0 | 139 | __ reset_last_Java_frame(); |
aoqi@0 | 140 | __ pop_frame(); |
aoqi@0 | 141 | |
aoqi@0 | 142 | __ bind(mh_done); |
aoqi@0 | 143 | // We have a handler in register SR_CTR (could be deopt blob). |
aoqi@0 | 144 | |
aoqi@0 | 145 | // Get the exception oop. |
aoqi@0 | 146 | __ ld(R3_ARG1, in_bytes(JavaThread::exception_oop_offset()), R16_thread); |
aoqi@0 | 147 | |
aoqi@0 | 148 | // Get the exception pc in case we are deoptimized. |
aoqi@0 | 149 | __ ld(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread); |
aoqi@0 | 150 | |
aoqi@0 | 151 | // Reset thread values. |
aoqi@0 | 152 | __ li(R0, 0); |
aoqi@0 | 153 | #ifdef ASSERT |
aoqi@0 | 154 | __ std(R0, in_bytes(JavaThread::exception_handler_pc_offset()), R16_thread); |
aoqi@0 | 155 | __ std(R0, in_bytes(JavaThread::exception_pc_offset()), R16_thread); |
aoqi@0 | 156 | #endif |
aoqi@0 | 157 | // Clear the exception oop so GC no longer processes it as a root. |
aoqi@0 | 158 | __ std(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread); |
aoqi@0 | 159 | |
aoqi@0 | 160 | // Move exception pc into SR_LR. |
aoqi@0 | 161 | __ mtlr(R4_ARG2); |
aoqi@0 | 162 | __ bctr(); |
aoqi@0 | 163 | |
aoqi@0 | 164 | |
aoqi@0 | 165 | // Same as above, but also set sp to unextended_sp. |
aoqi@0 | 166 | __ bind(mh_callsite); |
aoqi@0 | 167 | __ mr(R31, R3_RET); // Save branch address. |
aoqi@0 | 168 | __ mr(R3_ARG1, R16_thread); |
aoqi@0 | 169 | #if defined(ABI_ELFv2) |
aoqi@0 | 170 | __ call_c((address) adjust_SP_for_methodhandle_callsite, relocInfo::none); |
aoqi@0 | 171 | #else |
aoqi@0 | 172 | __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, adjust_SP_for_methodhandle_callsite), relocInfo::none); |
aoqi@0 | 173 | #endif |
aoqi@0 | 174 | // Returns unextended_sp in R3_RET. |
aoqi@0 | 175 | |
aoqi@0 | 176 | __ mtctr(R31); // Move address of exception handler to SR_CTR. |
aoqi@0 | 177 | __ reset_last_Java_frame(); |
aoqi@0 | 178 | |
aoqi@0 | 179 | __ mr(R1_SP, R3_RET); // Set sp to unextended_sp. |
aoqi@0 | 180 | __ b(mh_done); |
aoqi@0 | 181 | |
aoqi@0 | 182 | |
aoqi@0 | 183 | // Make sure all code is generated. |
aoqi@0 | 184 | masm->flush(); |
aoqi@0 | 185 | |
aoqi@0 | 186 | // Set exception blob. |
aoqi@0 | 187 | _exception_blob = ExceptionBlob::create(&buffer, oop_maps, |
aoqi@0 | 188 | frame_size_in_bytes/wordSize); |
aoqi@0 | 189 | } |
aoqi@0 | 190 | |
aoqi@0 | 191 | #endif // COMPILER2 |