| /* |
| * Copyright (c) 1998, 2016, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2015 SAP SE. 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 "interpreter/interp_masm.hpp" |
| #include "memory/resourceArea.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" |
| #endif |
| |
| #define __ masm-> |
| |
| |
| #ifdef COMPILER2 |
| |
| //------------------------------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); |
| |
| __ mtctr(R3_RET); // Move address of exception handler to SR_CTR. |
| __ reset_last_Java_frame(); |
| __ pop_frame(); |
| |
| // 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(); |
| |
| // 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 |