Mercurial > hg > truffle
view src/cpu/ppc/vm/runtime_ppc.cpp @ 18951:568baf3550d3
Merge
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
---|---|
date | Mon, 26 Jan 2015 21:53:57 +0100 |
parents | e5e8aa897002 |
children | 92aa6797d639 |
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/* * Copyright (c) 1998, 2013, Oracle and/or its affiliates. All rights reserved. * Copyright 2012, 2013 SAP AG. All rights reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. * */ #include "precompiled.hpp" #ifdef COMPILER2 #include "asm/assembler.inline.hpp" #include "asm/macroAssembler.inline.hpp" #include "classfile/systemDictionary.hpp" #include "code/vmreg.hpp" #include "interpreter/interpreter.hpp" #include "nativeInst_ppc.hpp" #include "opto/runtime.hpp" #include "runtime/interfaceSupport.hpp" #include "runtime/sharedRuntime.hpp" #include "runtime/stubRoutines.hpp" #include "runtime/vframeArray.hpp" #include "utilities/globalDefinitions.hpp" #include "vmreg_ppc.inline.hpp" #endif #define __ masm-> #ifdef COMPILER2 // SP adjustment (must use unextended SP) for method handle call sites // during exception handling. static intptr_t adjust_SP_for_methodhandle_callsite(JavaThread *thread) { RegisterMap map(thread, false); // The frame constructor will do the correction for us (see frame::adjust_unextended_SP). frame mh_caller_frame = thread->last_frame().sender(&map); assert(mh_caller_frame.is_compiled_frame(), "Only may reach here for compiled MH call sites"); return (intptr_t) mh_caller_frame.unextended_sp(); } //------------------------------generate_exception_blob--------------------------- // Creates exception blob at the end. // Using exception blob, this code is jumped from a compiled method. // // Given an exception pc at a call we call into the runtime for the // handler in this method. This handler might merely restore state // (i.e. callee save registers) unwind the frame and jump to the // exception handler for the nmethod if there is no Java level handler // for the nmethod. // // This code is entered with a jmp. // // Arguments: // R3_ARG1: exception oop // R4_ARG2: exception pc // // Results: // R3_ARG1: exception oop // R4_ARG2: exception pc in caller // destination: exception handler of caller // // Note: the exception pc MUST be at a call (precise debug information) // void OptoRuntime::generate_exception_blob() { // Allocate space for the code. ResourceMark rm; // Setup code generation tools. CodeBuffer buffer("exception_blob", 2048, 1024); InterpreterMacroAssembler* masm = new InterpreterMacroAssembler(&buffer); address start = __ pc(); int frame_size_in_bytes = frame::abi_reg_args_size; OopMap* map = new OopMap(frame_size_in_bytes / sizeof(jint), 0); // Exception pc is 'return address' for stack walker. __ std(R4_ARG2/*exception pc*/, _abi(lr), R1_SP); // Store the exception in the Thread object. __ std(R3_ARG1/*exception oop*/, in_bytes(JavaThread::exception_oop_offset()), R16_thread); __ std(R4_ARG2/*exception pc*/, in_bytes(JavaThread::exception_pc_offset()), R16_thread); // Save callee-saved registers. // Push a C frame for the exception blob. It is needed for the C call later on. __ push_frame_reg_args(0, R11_scratch1); // This call does all the hard work. It checks if an exception handler // exists in the method. // If so, it returns the handler address. // If not, it prepares for stack-unwinding, restoring the callee-save // registers of the frame being removed. __ set_last_Java_frame(/*sp=*/R1_SP, noreg); __ mr(R3_ARG1, R16_thread); #if defined(ABI_ELFv2) __ call_c((address) OptoRuntime::handle_exception_C, relocInfo::none); #else __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, OptoRuntime::handle_exception_C), relocInfo::none); #endif address calls_return_pc = __ last_calls_return_pc(); # ifdef ASSERT __ cmpdi(CCR0, R3_RET, 0); __ asm_assert_ne("handle_exception_C must not return NULL", 0x601); # endif // Set an oopmap for the call site. This oopmap will only be used if we // are unwinding the stack. Hence, all locations will be dead. // Callee-saved registers will be the same as the frame above (i.e., // handle_exception_stub), since they were restored when we got the // exception. OopMapSet* oop_maps = new OopMapSet(); oop_maps->add_gc_map(calls_return_pc - start, map); // Get unextended_sp for method handle call sites. Label mh_callsite, mh_done; // Use a 2nd c call if it's a method handle call site. __ lwa(R4_ARG2, in_bytes(JavaThread::is_method_handle_return_offset()), R16_thread); __ cmpwi(CCR0, R4_ARG2, 0); __ bne(CCR0, mh_callsite); __ mtctr(R3_RET); // Move address of exception handler to SR_CTR. __ reset_last_Java_frame(); __ pop_frame(); __ bind(mh_done); // We have a handler in register SR_CTR (could be deopt blob). // Get the exception oop. __ ld(R3_ARG1, in_bytes(JavaThread::exception_oop_offset()), R16_thread); // Get the exception pc in case we are deoptimized. __ ld(R4_ARG2, in_bytes(JavaThread::exception_pc_offset()), R16_thread); // Reset thread values. __ li(R0, 0); #ifdef ASSERT __ std(R0, in_bytes(JavaThread::exception_handler_pc_offset()), R16_thread); __ std(R0, in_bytes(JavaThread::exception_pc_offset()), R16_thread); #endif // Clear the exception oop so GC no longer processes it as a root. __ std(R0, in_bytes(JavaThread::exception_oop_offset()), R16_thread); // Move exception pc into SR_LR. __ mtlr(R4_ARG2); __ bctr(); // Same as above, but also set sp to unextended_sp. __ bind(mh_callsite); __ mr(R31, R3_RET); // Save branch address. __ mr(R3_ARG1, R16_thread); #if defined(ABI_ELFv2) __ call_c((address) adjust_SP_for_methodhandle_callsite, relocInfo::none); #else __ call_c(CAST_FROM_FN_PTR(FunctionDescriptor*, adjust_SP_for_methodhandle_callsite), relocInfo::none); #endif // Returns unextended_sp in R3_RET. __ mtctr(R31); // Move address of exception handler to SR_CTR. __ reset_last_Java_frame(); __ mr(R1_SP, R3_RET); // Set sp to unextended_sp. __ b(mh_done); // Make sure all code is generated. masm->flush(); // Set exception blob. _exception_blob = ExceptionBlob::create(&buffer, oop_maps, frame_size_in_bytes/wordSize); } #endif // COMPILER2