| /* |
| * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. 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" |
| #include "asm/assembler.hpp" |
| #include "c1/c1_CodeStubs.hpp" |
| #include "c1/c1_Defs.hpp" |
| #include "c1/c1_MacroAssembler.hpp" |
| #include "c1/c1_Runtime1.hpp" |
| #include "compiler/disassembler.hpp" |
| #include "gc/shared/cardTable.hpp" |
| #include "gc/shared/cardTableBarrierSet.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "nativeInst_aarch64.hpp" |
| #include "oops/compiledICHolder.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "register_aarch64.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/signature.hpp" |
| #include "runtime/vframe.hpp" |
| #include "runtime/vframeArray.hpp" |
| #include "vmreg_aarch64.inline.hpp" |
| |
| |
| // Implementation of StubAssembler |
| |
| int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, int args_size) { |
| // setup registers |
| assert(!(oop_result1->is_valid() || metadata_result->is_valid()) || oop_result1 != metadata_result, "registers must be different"); |
| assert(oop_result1 != rthread && metadata_result != rthread, "registers must be different"); |
| assert(args_size >= 0, "illegal args_size"); |
| bool align_stack = false; |
| |
| mov(c_rarg0, rthread); |
| set_num_rt_args(0); // Nothing on stack |
| |
| Label retaddr; |
| set_last_Java_frame(sp, rfp, retaddr, rscratch1); |
| |
| // do the call |
| lea(rscratch1, RuntimeAddress(entry)); |
| blrt(rscratch1, args_size + 1, 8, 1); |
| bind(retaddr); |
| int call_offset = offset(); |
| // verify callee-saved register |
| #ifdef ASSERT |
| push(r0, sp); |
| { Label L; |
| get_thread(r0); |
| cmp(rthread, r0); |
| br(Assembler::EQ, L); |
| stop("StubAssembler::call_RT: rthread not callee saved?"); |
| bind(L); |
| } |
| pop(r0, sp); |
| #endif |
| reset_last_Java_frame(true); |
| maybe_isb(); |
| |
| // check for pending exceptions |
| { Label L; |
| // check for pending exceptions (java_thread is set upon return) |
| ldr(rscratch1, Address(rthread, in_bytes(Thread::pending_exception_offset()))); |
| cbz(rscratch1, L); |
| // exception pending => remove activation and forward to exception handler |
| // make sure that the vm_results are cleared |
| if (oop_result1->is_valid()) { |
| str(zr, Address(rthread, JavaThread::vm_result_offset())); |
| } |
| if (metadata_result->is_valid()) { |
| str(zr, Address(rthread, JavaThread::vm_result_2_offset())); |
| } |
| if (frame_size() == no_frame_size) { |
| leave(); |
| far_jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| } else if (_stub_id == Runtime1::forward_exception_id) { |
| should_not_reach_here(); |
| } else { |
| far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); |
| } |
| bind(L); |
| } |
| // get oop results if there are any and reset the values in the thread |
| if (oop_result1->is_valid()) { |
| get_vm_result(oop_result1, rthread); |
| } |
| if (metadata_result->is_valid()) { |
| get_vm_result_2(metadata_result, rthread); |
| } |
| return call_offset; |
| } |
| |
| |
| int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1) { |
| mov(c_rarg1, arg1); |
| return call_RT(oop_result1, metadata_result, entry, 1); |
| } |
| |
| |
| int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2) { |
| if (c_rarg1 == arg2) { |
| if (c_rarg2 == arg1) { |
| mov(rscratch1, arg1); |
| mov(arg1, arg2); |
| mov(arg2, rscratch1); |
| } else { |
| mov(c_rarg2, arg2); |
| mov(c_rarg1, arg1); |
| } |
| } else { |
| mov(c_rarg1, arg1); |
| mov(c_rarg2, arg2); |
| } |
| return call_RT(oop_result1, metadata_result, entry, 2); |
| } |
| |
| |
| int StubAssembler::call_RT(Register oop_result1, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { |
| // if there is any conflict use the stack |
| if (arg1 == c_rarg2 || arg1 == c_rarg3 || |
| arg2 == c_rarg1 || arg1 == c_rarg3 || |
| arg3 == c_rarg1 || arg1 == c_rarg2) { |
| stp(arg3, arg2, Address(pre(sp, 2 * wordSize))); |
| stp(arg1, zr, Address(pre(sp, -2 * wordSize))); |
| ldp(c_rarg1, zr, Address(post(sp, 2 * wordSize))); |
| ldp(c_rarg3, c_rarg2, Address(post(sp, 2 * wordSize))); |
| } else { |
| mov(c_rarg1, arg1); |
| mov(c_rarg2, arg2); |
| mov(c_rarg3, arg3); |
| } |
| return call_RT(oop_result1, metadata_result, entry, 3); |
| } |
| |
| // Implementation of StubFrame |
| |
| class StubFrame: public StackObj { |
| private: |
| StubAssembler* _sasm; |
| |
| public: |
| StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments); |
| void load_argument(int offset_in_words, Register reg); |
| |
| ~StubFrame(); |
| };; |
| |
| void StubAssembler::prologue(const char* name, bool must_gc_arguments) { |
| set_info(name, must_gc_arguments); |
| enter(); |
| } |
| |
| void StubAssembler::epilogue() { |
| leave(); |
| ret(lr); |
| } |
| |
| #define __ _sasm-> |
| |
| StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments) { |
| _sasm = sasm; |
| __ prologue(name, must_gc_arguments); |
| } |
| |
| // load parameters that were stored with LIR_Assembler::store_parameter |
| // Note: offsets for store_parameter and load_argument must match |
| void StubFrame::load_argument(int offset_in_words, Register reg) { |
| __ load_parameter(offset_in_words, reg); |
| } |
| |
| |
| StubFrame::~StubFrame() { |
| __ epilogue(); |
| } |
| |
| #undef __ |
| |
| |
| // Implementation of Runtime1 |
| |
| #define __ sasm-> |
| |
| const int float_regs_as_doubles_size_in_slots = pd_nof_fpu_regs_frame_map * 2; |
| |
| // Stack layout for saving/restoring all the registers needed during a runtime |
| // call (this includes deoptimization) |
| // Note: note that users of this frame may well have arguments to some runtime |
| // while these values are on the stack. These positions neglect those arguments |
| // but the code in save_live_registers will take the argument count into |
| // account. |
| // |
| |
| enum reg_save_layout { |
| reg_save_frame_size = 32 /* float */ + 32 /* integer */ |
| }; |
| |
| // Save off registers which might be killed by calls into the runtime. |
| // Tries to smart of about FP registers. In particular we separate |
| // saving and describing the FPU registers for deoptimization since we |
| // have to save the FPU registers twice if we describe them. The |
| // deopt blob is the only thing which needs to describe FPU registers. |
| // In all other cases it should be sufficient to simply save their |
| // current value. |
| |
| static int cpu_reg_save_offsets[FrameMap::nof_cpu_regs]; |
| static int fpu_reg_save_offsets[FrameMap::nof_fpu_regs]; |
| static int reg_save_size_in_words; |
| static int frame_size_in_bytes = -1; |
| |
| static OopMap* generate_oop_map(StubAssembler* sasm, bool save_fpu_registers) { |
| int frame_size_in_bytes = reg_save_frame_size * BytesPerWord; |
| sasm->set_frame_size(frame_size_in_bytes / BytesPerWord); |
| int frame_size_in_slots = frame_size_in_bytes / sizeof(jint); |
| OopMap* oop_map = new OopMap(frame_size_in_slots, 0); |
| |
| for (int i = 0; i < FrameMap::nof_cpu_regs; i++) { |
| Register r = as_Register(i); |
| if (i <= 18 && i != rscratch1->encoding() && i != rscratch2->encoding()) { |
| int sp_offset = cpu_reg_save_offsets[i]; |
| oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), |
| r->as_VMReg()); |
| } |
| } |
| |
| if (save_fpu_registers) { |
| for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { |
| FloatRegister r = as_FloatRegister(i); |
| { |
| int sp_offset = fpu_reg_save_offsets[i]; |
| oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), |
| r->as_VMReg()); |
| } |
| } |
| } |
| return oop_map; |
| } |
| |
| static OopMap* save_live_registers(StubAssembler* sasm, |
| bool save_fpu_registers = true) { |
| __ block_comment("save_live_registers"); |
| |
| __ push(RegSet::range(r0, r29), sp); // integer registers except lr & sp |
| |
| if (save_fpu_registers) { |
| for (int i = 31; i>= 0; i -= 4) { |
| __ sub(sp, sp, 4 * wordSize); // no pre-increment for st1. Emulate it without modifying other registers |
| __ st1(as_FloatRegister(i-3), as_FloatRegister(i-2), as_FloatRegister(i-1), |
| as_FloatRegister(i), __ T1D, Address(sp)); |
| } |
| } else { |
| __ add(sp, sp, -32 * wordSize); |
| } |
| |
| return generate_oop_map(sasm, save_fpu_registers); |
| } |
| |
| static void restore_live_registers(StubAssembler* sasm, bool restore_fpu_registers = true) { |
| if (restore_fpu_registers) { |
| for (int i = 0; i < 32; i += 4) |
| __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), |
| as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); |
| } else { |
| __ add(sp, sp, 32 * wordSize); |
| } |
| |
| __ pop(RegSet::range(r0, r29), sp); |
| } |
| |
| static void restore_live_registers_except_r0(StubAssembler* sasm, bool restore_fpu_registers = true) { |
| |
| if (restore_fpu_registers) { |
| for (int i = 0; i < 32; i += 4) |
| __ ld1(as_FloatRegister(i), as_FloatRegister(i+1), as_FloatRegister(i+2), |
| as_FloatRegister(i+3), __ T1D, Address(__ post(sp, 4 * wordSize))); |
| } else { |
| __ add(sp, sp, 32 * wordSize); |
| } |
| |
| __ ldp(zr, r1, Address(__ post(sp, 16))); |
| __ pop(RegSet::range(r2, r29), sp); |
| } |
| |
| |
| |
| void Runtime1::initialize_pd() { |
| int i; |
| int sp_offset = 0; |
| |
| // all float registers are saved explicitly |
| assert(FrameMap::nof_fpu_regs == 32, "double registers not handled here"); |
| for (i = 0; i < FrameMap::nof_fpu_regs; i++) { |
| fpu_reg_save_offsets[i] = sp_offset; |
| sp_offset += 2; // SP offsets are in halfwords |
| } |
| |
| for (i = 0; i < FrameMap::nof_cpu_regs; i++) { |
| Register r = as_Register(i); |
| cpu_reg_save_offsets[i] = sp_offset; |
| sp_offset += 2; // SP offsets are in halfwords |
| } |
| } |
| |
| |
| // target: the entry point of the method that creates and posts the exception oop |
| // has_argument: true if the exception needs arguments (passed in rscratch1 and rscratch2) |
| |
| OopMapSet* Runtime1::generate_exception_throw(StubAssembler* sasm, address target, bool has_argument) { |
| // make a frame and preserve the caller's caller-save registers |
| OopMap* oop_map = save_live_registers(sasm); |
| int call_offset; |
| if (!has_argument) { |
| call_offset = __ call_RT(noreg, noreg, target); |
| } else { |
| __ mov(c_rarg1, rscratch1); |
| __ mov(c_rarg2, rscratch2); |
| call_offset = __ call_RT(noreg, noreg, target); |
| } |
| OopMapSet* oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| __ should_not_reach_here(); |
| return oop_maps; |
| } |
| |
| |
| OopMapSet* Runtime1::generate_handle_exception(StubID id, StubAssembler *sasm) { |
| __ block_comment("generate_handle_exception"); |
| |
| // incoming parameters |
| const Register exception_oop = r0; |
| const Register exception_pc = r3; |
| // other registers used in this stub |
| |
| // Save registers, if required. |
| OopMapSet* oop_maps = new OopMapSet(); |
| OopMap* oop_map = NULL; |
| switch (id) { |
| case forward_exception_id: |
| // We're handling an exception in the context of a compiled frame. |
| // The registers have been saved in the standard places. Perform |
| // an exception lookup in the caller and dispatch to the handler |
| // if found. Otherwise unwind and dispatch to the callers |
| // exception handler. |
| oop_map = generate_oop_map(sasm, 1 /*thread*/); |
| |
| // load and clear pending exception oop into r0 |
| __ ldr(exception_oop, Address(rthread, Thread::pending_exception_offset())); |
| __ str(zr, Address(rthread, Thread::pending_exception_offset())); |
| |
| // load issuing PC (the return address for this stub) into r3 |
| __ ldr(exception_pc, Address(rfp, 1*BytesPerWord)); |
| |
| // make sure that the vm_results are cleared (may be unnecessary) |
| __ str(zr, Address(rthread, JavaThread::vm_result_offset())); |
| __ str(zr, Address(rthread, JavaThread::vm_result_2_offset())); |
| break; |
| case handle_exception_nofpu_id: |
| case handle_exception_id: |
| // At this point all registers MAY be live. |
| oop_map = save_live_registers(sasm, id != handle_exception_nofpu_id); |
| break; |
| case handle_exception_from_callee_id: { |
| // At this point all registers except exception oop (r0) and |
| // exception pc (lr) are dead. |
| const int frame_size = 2 /*fp, return address*/; |
| oop_map = new OopMap(frame_size * VMRegImpl::slots_per_word, 0); |
| sasm->set_frame_size(frame_size); |
| break; |
| } |
| default: |
| __ should_not_reach_here(); |
| break; |
| } |
| |
| // verify that only r0 and r3 are valid at this time |
| __ invalidate_registers(false, true, true, false, true, true); |
| // verify that r0 contains a valid exception |
| __ verify_not_null_oop(exception_oop); |
| |
| #ifdef ASSERT |
| // check that fields in JavaThread for exception oop and issuing pc are |
| // empty before writing to them |
| Label oop_empty; |
| __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); |
| __ cbz(rscratch1, oop_empty); |
| __ stop("exception oop already set"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); |
| __ cbz(rscratch1, pc_empty); |
| __ stop("exception pc already set"); |
| __ bind(pc_empty); |
| #endif |
| |
| // save exception oop and issuing pc into JavaThread |
| // (exception handler will load it from here) |
| __ str(exception_oop, Address(rthread, JavaThread::exception_oop_offset())); |
| __ str(exception_pc, Address(rthread, JavaThread::exception_pc_offset())); |
| |
| // patch throwing pc into return address (has bci & oop map) |
| __ str(exception_pc, Address(rfp, 1*BytesPerWord)); |
| |
| // compute the exception handler. |
| // the exception oop and the throwing pc are read from the fields in JavaThread |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, exception_handler_for_pc)); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| // r0: handler address |
| // will be the deopt blob if nmethod was deoptimized while we looked up |
| // handler regardless of whether handler existed in the nmethod. |
| |
| // only r0 is valid at this time, all other registers have been destroyed by the runtime call |
| __ invalidate_registers(false, true, true, true, true, true); |
| |
| // patch the return address, this stub will directly return to the exception handler |
| __ str(r0, Address(rfp, 1*BytesPerWord)); |
| |
| switch (id) { |
| case forward_exception_id: |
| case handle_exception_nofpu_id: |
| case handle_exception_id: |
| // Restore the registers that were saved at the beginning. |
| restore_live_registers(sasm, id != handle_exception_nofpu_id); |
| break; |
| case handle_exception_from_callee_id: |
| // Pop the return address. |
| __ leave(); |
| __ ret(lr); // jump to exception handler |
| break; |
| default: ShouldNotReachHere(); |
| } |
| |
| return oop_maps; |
| } |
| |
| |
| void Runtime1::generate_unwind_exception(StubAssembler *sasm) { |
| // incoming parameters |
| const Register exception_oop = r0; |
| // callee-saved copy of exception_oop during runtime call |
| const Register exception_oop_callee_saved = r19; |
| // other registers used in this stub |
| const Register exception_pc = r3; |
| const Register handler_addr = r1; |
| |
| // verify that only r0, is valid at this time |
| __ invalidate_registers(false, true, true, true, true, true); |
| |
| #ifdef ASSERT |
| // check that fields in JavaThread for exception oop and issuing pc are empty |
| Label oop_empty; |
| __ ldr(rscratch1, Address(rthread, JavaThread::exception_oop_offset())); |
| __ cbz(rscratch1, oop_empty); |
| __ stop("exception oop must be empty"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); |
| __ cbz(rscratch1, pc_empty); |
| __ stop("exception pc must be empty"); |
| __ bind(pc_empty); |
| #endif |
| |
| // Save our return address because |
| // exception_handler_for_return_address will destroy it. We also |
| // save exception_oop |
| __ stp(lr, exception_oop, Address(__ pre(sp, -2 * wordSize))); |
| |
| // search the exception handler address of the caller (using the return address) |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::exception_handler_for_return_address), rthread, lr); |
| // r0: exception handler address of the caller |
| |
| // Only R0 is valid at this time; all other registers have been |
| // destroyed by the call. |
| __ invalidate_registers(false, true, true, true, false, true); |
| |
| // move result of call into correct register |
| __ mov(handler_addr, r0); |
| |
| // get throwing pc (= return address). |
| // lr has been destroyed by the call |
| __ ldp(lr, exception_oop, Address(__ post(sp, 2 * wordSize))); |
| __ mov(r3, lr); |
| |
| __ verify_not_null_oop(exception_oop); |
| |
| // continue at exception handler (return address removed) |
| // note: do *not* remove arguments when unwinding the |
| // activation since the caller assumes having |
| // all arguments on the stack when entering the |
| // runtime to determine the exception handler |
| // (GC happens at call site with arguments!) |
| // r0: exception oop |
| // r3: throwing pc |
| // r1: exception handler |
| __ br(handler_addr); |
| } |
| |
| |
| |
| OopMapSet* Runtime1::generate_patching(StubAssembler* sasm, address target) { |
| // use the maximum number of runtime-arguments here because it is difficult to |
| // distinguish each RT-Call. |
| // Note: This number affects also the RT-Call in generate_handle_exception because |
| // the oop-map is shared for all calls. |
| DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
| assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
| |
| OopMap* oop_map = save_live_registers(sasm); |
| |
| __ mov(c_rarg0, rthread); |
| Label retaddr; |
| __ set_last_Java_frame(sp, rfp, retaddr, rscratch1); |
| // do the call |
| __ lea(rscratch1, RuntimeAddress(target)); |
| __ blrt(rscratch1, 1, 0, 1); |
| __ bind(retaddr); |
| OopMapSet* oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(__ offset(), oop_map); |
| // verify callee-saved register |
| #ifdef ASSERT |
| { Label L; |
| __ get_thread(rscratch1); |
| __ cmp(rthread, rscratch1); |
| __ br(Assembler::EQ, L); |
| __ stop("StubAssembler::call_RT: rthread not callee saved?"); |
| __ bind(L); |
| } |
| #endif |
| __ reset_last_Java_frame(true); |
| __ maybe_isb(); |
| |
| // check for pending exceptions |
| { Label L; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, L); |
| // exception pending => remove activation and forward to exception handler |
| |
| { Label L1; |
| __ cbnz(r0, L1); // have we deoptimized? |
| __ far_jump(RuntimeAddress(Runtime1::entry_for(Runtime1::forward_exception_id))); |
| __ bind(L1); |
| } |
| |
| // the deopt blob expects exceptions in the special fields of |
| // JavaThread, so copy and clear pending exception. |
| |
| // load and clear pending exception |
| __ ldr(r0, Address(rthread, Thread::pending_exception_offset())); |
| __ str(zr, Address(rthread, Thread::pending_exception_offset())); |
| |
| // check that there is really a valid exception |
| __ verify_not_null_oop(r0); |
| |
| // load throwing pc: this is the return address of the stub |
| __ mov(r3, lr); |
| |
| #ifdef ASSERT |
| // check that fields in JavaThread for exception oop and issuing pc are empty |
| Label oop_empty; |
| __ ldr(rscratch1, Address(rthread, Thread::pending_exception_offset())); |
| __ cbz(rscratch1, oop_empty); |
| __ stop("exception oop must be empty"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ldr(rscratch1, Address(rthread, JavaThread::exception_pc_offset())); |
| __ cbz(rscratch1, pc_empty); |
| __ stop("exception pc must be empty"); |
| __ bind(pc_empty); |
| #endif |
| |
| // store exception oop and throwing pc to JavaThread |
| __ str(r0, Address(rthread, JavaThread::exception_oop_offset())); |
| __ str(r3, Address(rthread, JavaThread::exception_pc_offset())); |
| |
| restore_live_registers(sasm); |
| |
| __ leave(); |
| |
| // Forward the exception directly to deopt blob. We can blow no |
| // registers and must leave throwing pc on the stack. A patch may |
| // have values live in registers so the entry point with the |
| // exception in tls. |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_exception_in_tls())); |
| |
| __ bind(L); |
| } |
| |
| |
| // Runtime will return true if the nmethod has been deoptimized during |
| // the patching process. In that case we must do a deopt reexecute instead. |
| |
| Label reexecuteEntry, cont; |
| |
| __ cbz(r0, cont); // have we deoptimized? |
| |
| // Will reexecute. Proper return address is already on the stack we just restore |
| // registers, pop all of our frame but the return address and jump to the deopt blob |
| restore_live_registers(sasm); |
| __ leave(); |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| |
| __ bind(cont); |
| restore_live_registers(sasm); |
| __ leave(); |
| __ ret(lr); |
| |
| return oop_maps; |
| } |
| |
| |
| OopMapSet* Runtime1::generate_code_for(StubID id, StubAssembler* sasm) { |
| |
| const Register exception_oop = r0; |
| const Register exception_pc = r3; |
| |
| // for better readability |
| const bool must_gc_arguments = true; |
| const bool dont_gc_arguments = false; |
| |
| // default value; overwritten for some optimized stubs that are called from methods that do not use the fpu |
| bool save_fpu_registers = true; |
| |
| // stub code & info for the different stubs |
| OopMapSet* oop_maps = NULL; |
| OopMap* oop_map = NULL; |
| switch (id) { |
| { |
| case forward_exception_id: |
| { |
| oop_maps = generate_handle_exception(id, sasm); |
| __ leave(); |
| __ ret(lr); |
| } |
| break; |
| |
| case throw_div0_exception_id: |
| { StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); |
| } |
| break; |
| |
| case throw_null_pointer_exception_id: |
| { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); |
| } |
| break; |
| |
| case new_instance_id: |
| case fast_new_instance_id: |
| case fast_new_instance_init_check_id: |
| { |
| Register klass = r3; // Incoming |
| Register obj = r0; // Result |
| |
| if (id == new_instance_id) { |
| __ set_info("new_instance", dont_gc_arguments); |
| } else if (id == fast_new_instance_id) { |
| __ set_info("fast new_instance", dont_gc_arguments); |
| } else { |
| assert(id == fast_new_instance_init_check_id, "bad StubID"); |
| __ set_info("fast new_instance init check", dont_gc_arguments); |
| } |
| |
| if ((id == fast_new_instance_id || id == fast_new_instance_init_check_id) && |
| UseTLAB && Universe::heap()->supports_inline_contig_alloc()) { |
| Label slow_path; |
| Register obj_size = r2; |
| Register t1 = r19; |
| Register t2 = r4; |
| assert_different_registers(klass, obj, obj_size, t1, t2); |
| |
| __ stp(r19, zr, Address(__ pre(sp, -2 * wordSize))); |
| |
| if (id == fast_new_instance_init_check_id) { |
| // make sure the klass is initialized |
| __ ldrb(rscratch1, Address(klass, InstanceKlass::init_state_offset())); |
| __ cmpw(rscratch1, InstanceKlass::fully_initialized); |
| __ br(Assembler::NE, slow_path); |
| } |
| |
| #ifdef ASSERT |
| // assert object can be fast path allocated |
| { |
| Label ok, not_ok; |
| __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); |
| __ cmp(obj_size, 0u); |
| __ br(Assembler::LE, not_ok); // make sure it's an instance (LH > 0) |
| __ tstw(obj_size, Klass::_lh_instance_slow_path_bit); |
| __ br(Assembler::EQ, ok); |
| __ bind(not_ok); |
| __ stop("assert(can be fast path allocated)"); |
| __ should_not_reach_here(); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| |
| // get the instance size (size is postive so movl is fine for 64bit) |
| __ ldrw(obj_size, Address(klass, Klass::layout_helper_offset())); |
| |
| __ eden_allocate(obj, obj_size, 0, t1, slow_path); |
| |
| __ initialize_object(obj, klass, obj_size, 0, t1, t2, /* is_tlab_allocated */ false); |
| __ verify_oop(obj); |
| __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize))); |
| __ ret(lr); |
| |
| __ bind(slow_path); |
| __ ldp(r19, zr, Address(__ post(sp, 2 * wordSize))); |
| } |
| |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r0(sasm); |
| __ verify_oop(obj); |
| __ leave(); |
| __ ret(lr); |
| |
| // r0,: new instance |
| } |
| |
| break; |
| |
| case counter_overflow_id: |
| { |
| Register bci = r0, method = r1; |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| // Retrieve bci |
| __ ldrw(bci, Address(rfp, 2*BytesPerWord)); |
| // And a pointer to the Method* |
| __ ldr(method, Address(rfp, 3*BytesPerWord)); |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm); |
| __ leave(); |
| __ ret(lr); |
| } |
| break; |
| |
| case new_type_array_id: |
| case new_object_array_id: |
| { |
| Register length = r19; // Incoming |
| Register klass = r3; // Incoming |
| Register obj = r0; // Result |
| |
| if (id == new_type_array_id) { |
| __ set_info("new_type_array", dont_gc_arguments); |
| } else { |
| __ set_info("new_object_array", dont_gc_arguments); |
| } |
| |
| #ifdef ASSERT |
| // assert object type is really an array of the proper kind |
| { |
| Label ok; |
| Register t0 = obj; |
| __ ldrw(t0, Address(klass, Klass::layout_helper_offset())); |
| __ asrw(t0, t0, Klass::_lh_array_tag_shift); |
| int tag = ((id == new_type_array_id) |
| ? Klass::_lh_array_tag_type_value |
| : Klass::_lh_array_tag_obj_value); |
| __ mov(rscratch1, tag); |
| __ cmpw(t0, rscratch1); |
| __ br(Assembler::EQ, ok); |
| __ stop("assert(is an array klass)"); |
| __ should_not_reach_here(); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| |
| if (UseTLAB && Universe::heap()->supports_inline_contig_alloc()) { |
| Register arr_size = r4; |
| Register t1 = r2; |
| Register t2 = r5; |
| Label slow_path; |
| assert_different_registers(length, klass, obj, arr_size, t1, t2); |
| |
| // check that array length is small enough for fast path. |
| __ mov(rscratch1, C1_MacroAssembler::max_array_allocation_length); |
| __ cmpw(length, rscratch1); |
| __ br(Assembler::HI, slow_path); |
| |
| // get the allocation size: round_up(hdr + length << (layout_helper & 0x1F)) |
| // since size is positive ldrw does right thing on 64bit |
| __ ldrw(t1, Address(klass, Klass::layout_helper_offset())); |
| // since size is positive movw does right thing on 64bit |
| __ movw(arr_size, length); |
| __ lslvw(arr_size, length, t1); |
| __ ubfx(t1, t1, Klass::_lh_header_size_shift, |
| exact_log2(Klass::_lh_header_size_mask + 1)); |
| __ add(arr_size, arr_size, t1); |
| __ add(arr_size, arr_size, MinObjAlignmentInBytesMask); // align up |
| __ andr(arr_size, arr_size, ~MinObjAlignmentInBytesMask); |
| |
| __ eden_allocate(obj, arr_size, 0, t1, slow_path); // preserves arr_size |
| |
| __ initialize_header(obj, klass, length, t1, t2); |
| __ ldrb(t1, Address(klass, in_bytes(Klass::layout_helper_offset()) + (Klass::_lh_header_size_shift / BitsPerByte))); |
| assert(Klass::_lh_header_size_shift % BitsPerByte == 0, "bytewise"); |
| assert(Klass::_lh_header_size_mask <= 0xFF, "bytewise"); |
| __ andr(t1, t1, Klass::_lh_header_size_mask); |
| __ sub(arr_size, arr_size, t1); // body length |
| __ add(t1, t1, obj); // body start |
| __ initialize_body(t1, arr_size, 0, t2); |
| __ verify_oop(obj); |
| |
| __ ret(lr); |
| |
| __ bind(slow_path); |
| } |
| |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| int call_offset; |
| if (id == new_type_array_id) { |
| call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_type_array), klass, length); |
| } else { |
| call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_object_array), klass, length); |
| } |
| |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r0(sasm); |
| |
| __ verify_oop(obj); |
| __ leave(); |
| __ ret(lr); |
| |
| // r0: new array |
| } |
| break; |
| |
| case new_multi_array_id: |
| { StubFrame f(sasm, "new_multi_array", dont_gc_arguments); |
| // r0,: klass |
| // r19,: rank |
| // r2: address of 1st dimension |
| OopMap* map = save_live_registers(sasm); |
| __ mov(c_rarg1, r0); |
| __ mov(c_rarg3, r2); |
| __ mov(c_rarg2, r19); |
| int call_offset = __ call_RT(r0, noreg, CAST_FROM_FN_PTR(address, new_multi_array), r1, r2, r3); |
| |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r0(sasm); |
| |
| // r0,: new multi array |
| __ verify_oop(r0); |
| } |
| break; |
| |
| case register_finalizer_id: |
| { |
| __ set_info("register_finalizer", dont_gc_arguments); |
| |
| // This is called via call_runtime so the arguments |
| // will be place in C abi locations |
| |
| __ verify_oop(c_rarg0); |
| |
| // load the klass and check the has finalizer flag |
| Label register_finalizer; |
| Register t = r5; |
| __ load_klass(t, r0); |
| __ ldrw(t, Address(t, Klass::access_flags_offset())); |
| __ tbnz(t, exact_log2(JVM_ACC_HAS_FINALIZER), register_finalizer); |
| __ ret(lr); |
| |
| __ bind(register_finalizer); |
| __ enter(); |
| OopMap* oop_map = save_live_registers(sasm); |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), r0); |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| // Now restore all the live registers |
| restore_live_registers(sasm); |
| |
| __ leave(); |
| __ ret(lr); |
| } |
| break; |
| |
| case throw_class_cast_exception_id: |
| { StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); |
| } |
| break; |
| |
| case throw_incompatible_class_change_error_id: |
| { StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); |
| } |
| break; |
| |
| case slow_subtype_check_id: |
| { |
| // Typical calling sequence: |
| // __ push(klass_RInfo); // object klass or other subclass |
| // __ push(sup_k_RInfo); // array element klass or other superclass |
| // __ bl(slow_subtype_check); |
| // Note that the subclass is pushed first, and is therefore deepest. |
| enum layout { |
| r0_off, r0_off_hi, |
| r2_off, r2_off_hi, |
| r4_off, r4_off_hi, |
| r5_off, r5_off_hi, |
| sup_k_off, sup_k_off_hi, |
| klass_off, klass_off_hi, |
| framesize, |
| result_off = sup_k_off |
| }; |
| |
| __ set_info("slow_subtype_check", dont_gc_arguments); |
| __ push(RegSet::of(r0, r2, r4, r5), sp); |
| |
| // This is called by pushing args and not with C abi |
| // __ ldr(r4, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // subclass |
| // __ ldr(r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // superclass |
| |
| __ ldp(r4, r0, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); |
| |
| Label miss; |
| __ check_klass_subtype_slow_path(r4, r0, r2, r5, NULL, &miss); |
| |
| // fallthrough on success: |
| __ mov(rscratch1, 1); |
| __ str(rscratch1, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result |
| __ pop(RegSet::of(r0, r2, r4, r5), sp); |
| __ ret(lr); |
| |
| __ bind(miss); |
| __ str(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result |
| __ pop(RegSet::of(r0, r2, r4, r5), sp); |
| __ ret(lr); |
| } |
| break; |
| |
| case monitorenter_nofpu_id: |
| save_fpu_registers = false; |
| // fall through |
| case monitorenter_id: |
| { |
| StubFrame f(sasm, "monitorenter", dont_gc_arguments); |
| OopMap* map = save_live_registers(sasm, save_fpu_registers); |
| |
| // Called with store_parameter and not C abi |
| |
| f.load_argument(1, r0); // r0,: object |
| f.load_argument(0, r1); // r1,: lock address |
| |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), r0, r1); |
| |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm, save_fpu_registers); |
| } |
| break; |
| |
| case monitorexit_nofpu_id: |
| save_fpu_registers = false; |
| // fall through |
| case monitorexit_id: |
| { |
| StubFrame f(sasm, "monitorexit", dont_gc_arguments); |
| OopMap* map = save_live_registers(sasm, save_fpu_registers); |
| |
| // Called with store_parameter and not C abi |
| |
| f.load_argument(0, r0); // r0,: lock address |
| |
| // note: really a leaf routine but must setup last java sp |
| // => use call_RT for now (speed can be improved by |
| // doing last java sp setup manually) |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorexit), r0); |
| |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm, save_fpu_registers); |
| } |
| break; |
| |
| case deoptimize_id: |
| { |
| StubFrame f(sasm, "deoptimize", dont_gc_arguments); |
| OopMap* oop_map = save_live_registers(sasm); |
| f.load_argument(0, c_rarg1); |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, deoptimize), c_rarg1); |
| |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| restore_live_registers(sasm); |
| DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
| assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
| __ leave(); |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| } |
| break; |
| |
| case throw_range_check_failed_id: |
| { StubFrame f(sasm, "range_check_failed", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); |
| } |
| break; |
| |
| case unwind_exception_id: |
| { __ set_info("unwind_exception", dont_gc_arguments); |
| // note: no stubframe since we are about to leave the current |
| // activation and we are calling a leaf VM function only. |
| generate_unwind_exception(sasm); |
| } |
| break; |
| |
| case access_field_patching_id: |
| { StubFrame f(sasm, "access_field_patching", dont_gc_arguments); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); |
| } |
| break; |
| |
| case load_klass_patching_id: |
| { StubFrame f(sasm, "load_klass_patching", dont_gc_arguments); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); |
| } |
| break; |
| |
| case load_mirror_patching_id: |
| { StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); |
| } |
| break; |
| |
| case load_appendix_patching_id: |
| { StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); |
| } |
| break; |
| |
| case handle_exception_nofpu_id: |
| case handle_exception_id: |
| { StubFrame f(sasm, "handle_exception", dont_gc_arguments); |
| oop_maps = generate_handle_exception(id, sasm); |
| } |
| break; |
| |
| case handle_exception_from_callee_id: |
| { StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); |
| oop_maps = generate_handle_exception(id, sasm); |
| } |
| break; |
| |
| case throw_index_exception_id: |
| { StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); |
| } |
| break; |
| |
| case throw_array_store_exception_id: |
| { StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments); |
| // tos + 0: link |
| // + 1: return address |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); |
| } |
| break; |
| |
| case predicate_failed_trap_id: |
| { |
| StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments); |
| |
| OopMap* map = save_live_registers(sasm); |
| |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); |
| oop_maps = new OopMapSet(); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm); |
| __ leave(); |
| DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
| assert(deopt_blob != NULL, "deoptimization blob must have been created"); |
| |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| } |
| break; |
| |
| |
| default: |
| { StubFrame f(sasm, "unimplemented entry", dont_gc_arguments); |
| __ mov(r0, (int)id); |
| __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), r0); |
| __ should_not_reach_here(); |
| } |
| break; |
| } |
| } |
| return oop_maps; |
| } |
| |
| #undef __ |
| |
| const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); return 0; } |
