| /* |
| * Copyright (c) 1999, 2025, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2014, Red Hat Inc. All rights reserved. |
| * Copyright (c) 2020, 2023, Huawei Technologies Co., Ltd. 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 "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 "compiler/oopMap.hpp" |
| #include "gc/shared/cardTable.hpp" |
| #include "gc/shared/cardTableBarrierSet.hpp" |
| #include "interpreter/interpreter.hpp" |
| #include "memory/universe.hpp" |
| #include "nativeInst_riscv.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "prims/jvmtiExport.hpp" |
| #include "register_riscv.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/signature.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/vframe.hpp" |
| #include "runtime/vframeArray.hpp" |
| #include "utilities/powerOfTwo.hpp" |
| #include "vmreg_riscv.inline.hpp" |
| |
| |
| // Implementation of StubAssembler |
| |
| int StubAssembler::call_RT(Register oop_result, Register metadata_result, address entry, int args_size) { |
| // setup registers |
| assert(!(oop_result->is_valid() || metadata_result->is_valid()) || oop_result != metadata_result, |
| "registers must be different"); |
| assert(oop_result != xthread && metadata_result != xthread, "registers must be different"); |
| assert(args_size >= 0, "illegal args_size"); |
| bool align_stack = false; |
| |
| mv(c_rarg0, xthread); |
| set_num_rt_args(0); // Nothing on stack |
| |
| Label retaddr; |
| set_last_Java_frame(sp, fp, retaddr, t0); |
| |
| // do the call |
| rt_call(entry); |
| bind(retaddr); |
| int call_offset = offset(); |
| // verify callee-saved register |
| #ifdef ASSERT |
| push_reg(x10, sp); |
| { Label L; |
| get_thread(x10); |
| beq(xthread, x10, L); |
| stop("StubAssembler::call_RT: xthread not callee saved?"); |
| bind(L); |
| } |
| pop_reg(x10, sp); |
| #endif |
| reset_last_Java_frame(true); |
| |
| // check for pending exceptions |
| { Label L; |
| // check for pending exceptions (java_thread is set upon return) |
| ld(t0, Address(xthread, in_bytes(Thread::pending_exception_offset()))); |
| beqz(t0, L); |
| // exception pending => remove activation and forward to exception handler |
| // make sure that the vm_results are cleared |
| if (oop_result->is_valid()) { |
| sd(zr, Address(xthread, JavaThread::vm_result_oop_offset())); |
| } |
| if (metadata_result->is_valid()) { |
| sd(zr, Address(xthread, JavaThread::vm_result_metadata_offset())); |
| } |
| if (frame_size() == no_frame_size) { |
| leave(); |
| far_jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
| } else if (_stub_id == (int)C1StubId::forward_exception_id) { |
| should_not_reach_here(); |
| } else { |
| far_jump(RuntimeAddress(Runtime1::entry_for(C1StubId::forward_exception_id))); |
| } |
| bind(L); |
| } |
| // get oop results if there are any and reset the values in the thread |
| if (oop_result->is_valid()) { |
| get_vm_result_oop(oop_result, xthread); |
| } |
| if (metadata_result->is_valid()) { |
| get_vm_result_metadata(metadata_result, xthread); |
| } |
| return call_offset; |
| } |
| |
| int StubAssembler::call_RT(Register oop_result, Register metadata_result, address entry, Register arg1) { |
| mv(c_rarg1, arg1); |
| return call_RT(oop_result, metadata_result, entry, 1); |
| } |
| |
| int StubAssembler::call_RT(Register oop_result, Register metadata_result, address entry, Register arg1, Register arg2) { |
| const int arg_num = 2; |
| if (c_rarg1 == arg2) { |
| if (c_rarg2 == arg1) { |
| xorr(arg1, arg1, arg2); |
| xorr(arg2, arg1, arg2); |
| xorr(arg1, arg1, arg2); |
| } else { |
| mv(c_rarg2, arg2); |
| mv(c_rarg1, arg1); |
| } |
| } else { |
| mv(c_rarg1, arg1); |
| mv(c_rarg2, arg2); |
| } |
| return call_RT(oop_result, metadata_result, entry, arg_num); |
| } |
| |
| int StubAssembler::call_RT(Register oop_result, Register metadata_result, address entry, Register arg1, Register arg2, Register arg3) { |
| const int arg_num = 3; |
| // if there is any conflict use the stack |
| if (arg1 == c_rarg2 || arg1 == c_rarg3 || |
| arg2 == c_rarg1 || arg2 == c_rarg3 || |
| arg3 == c_rarg1 || arg3 == c_rarg2) { |
| const int arg1_sp_offset = 0; |
| const int arg2_sp_offset = 1; |
| const int arg3_sp_offset = 2; |
| subi(sp, sp, (arg_num + 1) * wordSize); |
| sd(arg1, Address(sp, arg1_sp_offset * wordSize)); |
| sd(arg2, Address(sp, arg2_sp_offset * wordSize)); |
| sd(arg3, Address(sp, arg3_sp_offset * wordSize)); |
| |
| ld(c_rarg1, Address(sp, arg1_sp_offset * wordSize)); |
| ld(c_rarg2, Address(sp, arg2_sp_offset * wordSize)); |
| ld(c_rarg3, Address(sp, arg3_sp_offset * wordSize)); |
| addi(sp, sp, (arg_num + 1) * wordSize); |
| } else { |
| mv(c_rarg1, arg1); |
| mv(c_rarg2, arg2); |
| mv(c_rarg3, arg3); |
| } |
| return call_RT(oop_result, metadata_result, entry, arg_num); |
| } |
| |
| enum return_state_t { |
| does_not_return, requires_return, requires_pop_epilogue_return |
| }; |
| |
| // Implementation of StubFrame |
| |
| class StubFrame: public StackObj { |
| private: |
| StubAssembler* _sasm; |
| return_state_t _return_state; |
| |
| public: |
| StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state=requires_return); |
| 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(bool use_pop) { |
| // Avoid using a leave instruction when this frame may |
| // have been frozen, since the current value of fp |
| // restored from the stub would be invalid. We still |
| // must restore the fp value saved on enter though. |
| if (use_pop) { |
| ld(fp, Address(sp)); |
| ld(ra, Address(sp, wordSize)); |
| addi(sp, sp, 2 * wordSize); |
| } else { |
| leave(); |
| } |
| ret(); |
| } |
| |
| #define __ _sasm-> |
| |
| StubFrame::StubFrame(StubAssembler* sasm, const char* name, bool must_gc_arguments, return_state_t return_state) { |
| _sasm = sasm; |
| _return_state = return_state; |
| __ 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() { |
| if (_return_state == does_not_return) { |
| __ should_not_reach_here(); |
| } else { |
| __ epilogue(_return_state == requires_pop_epilogue_return); |
| } |
| _sasm = nullptr; |
| } |
| |
| #undef __ |
| |
| |
| // Implementation of Runtime1 |
| |
| #define __ sasm-> |
| |
| // 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 */ + 30 /* integer excluding x3, x4 */ |
| }; |
| |
| // Save off registers which might be killed by calls into the runtime. |
| // Tries to smart of about FPU 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 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); |
| assert_cond(oop_map != nullptr); |
| |
| // caller save registers only, see FrameMap::initialize |
| // in c1_FrameMap_riscv.cpp for detail. |
| const static Register caller_save_cpu_regs[FrameMap::max_nof_caller_save_cpu_regs] = { |
| x7, x10, x11, x12, x13, x14, x15, x16, x17, x28, x29, x30, x31 |
| }; |
| |
| for (int i = 0; i < FrameMap::max_nof_caller_save_cpu_regs; i++) { |
| Register r = caller_save_cpu_regs[i]; |
| int sp_offset = cpu_reg_save_offsets[r->encoding()]; |
| oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), |
| r->as_VMReg()); |
| } |
| |
| int sp_offset = cpu_reg_save_offsets[xthread->encoding()]; |
| oop_map->set_callee_saved(VMRegImpl::stack2reg(sp_offset), |
| xthread->as_VMReg()); |
| |
| // fpu_regs |
| 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"); |
| |
| // if the number of pushed regs is odd, one slot will be reserved for alignment |
| __ push_reg(RegSet::range(x5, x31), sp); // integer registers except ra(x1) & sp(x2) & gp(x3) & tp(x4) |
| |
| if (save_fpu_registers) { |
| // float registers |
| __ subi(sp, sp, FrameMap::nof_fpu_regs * wordSize); |
| for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { |
| __ fsd(as_FloatRegister(i), Address(sp, i * wordSize)); |
| } |
| } else { |
| // we define reg_save_layout = 62 as the fixed frame size, |
| // we should also sub 32 * wordSize to sp when save_fpu_registers == false |
| __ subi(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 < FrameMap::nof_fpu_regs; i++) { |
| __ fld(as_FloatRegister(i), Address(sp, i * wordSize)); |
| } |
| __ addi(sp, sp, FrameMap::nof_fpu_regs * wordSize); |
| } else { |
| // we define reg_save_layout = 64 as the fixed frame size, |
| // we should also add 32 * wordSize to sp when save_fpu_registers == false |
| __ addi(sp, sp, 32 * wordSize); |
| } |
| |
| // if the number of popped regs is odd, the reserved slot for alignment will be removed |
| __ pop_reg(RegSet::range(x5, x31), sp); // integer registers except ra(x1) & sp(x2) & gp(x3) & tp(x4) |
| } |
| |
| static void restore_live_registers_except_r10(StubAssembler* sasm, bool restore_fpu_registers = true) { |
| if (restore_fpu_registers) { |
| for (int i = 0; i < FrameMap::nof_fpu_regs; i++) { |
| __ fld(as_FloatRegister(i), Address(sp, i * wordSize)); |
| } |
| __ addi(sp, sp, FrameMap::nof_fpu_regs * wordSize); |
| } else { |
| // we define reg_save_layout = 64 as the fixed frame size, |
| // we should also add 32 * wordSize to sp when save_fpu_registers == false |
| __ addi(sp, sp, 32 * wordSize); |
| } |
| |
| // pop integer registers except ra(x1) & sp(x2) & gp(x3) & tp(x4) & x10 |
| // there is one reserved slot for alignment on the stack in save_live_registers(). |
| __ pop_reg(RegSet::range(x5, x9), sp); // pop x5 ~ x9 with the reserved slot for alignment |
| __ pop_reg(RegSet::range(x11, x31), sp); // pop x11 ~ x31; x10 will be automatically skipped here |
| } |
| |
| void Runtime1::initialize_pd() { |
| int i = 0; |
| int sp_offset = 0; |
| const int step = 2; // SP offsets are in halfwords |
| |
| // all float registers are saved explicitly |
| for (i = 0; i < FrameMap::nof_fpu_regs; i++) { |
| fpu_reg_save_offsets[i] = sp_offset; |
| sp_offset += step; |
| } |
| |
| // a slot reserved for stack 16-byte alignment, see MacroAssembler::push_reg |
| sp_offset += step; |
| // we save x5 ~ x31, except x0 ~ x4: loop starts from x5 |
| for (i = 5; i < FrameMap::nof_cpu_regs; i++) { |
| cpu_reg_save_offsets[i] = sp_offset; |
| sp_offset += step; |
| } |
| } |
| |
| // return: offset in 64-bit words. |
| uint Runtime1::runtime_blob_current_thread_offset(frame f) { |
| CodeBlob* cb = f.cb(); |
| assert(cb == Runtime1::blob_for(C1StubId::monitorenter_id) || |
| cb == Runtime1::blob_for(C1StubId::monitorenter_nofpu_id), "must be"); |
| assert(cb != nullptr && cb->is_runtime_stub(), "invalid frame"); |
| int offset = cpu_reg_save_offsets[xthread->encoding()]; |
| return 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 t0 and t1) |
| |
| 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); |
| assert_cond(oop_map != nullptr); |
| int call_offset = 0; |
| if (!has_argument) { |
| call_offset = __ call_RT(noreg, noreg, target); |
| } else { |
| __ mv(c_rarg1, t0); |
| __ mv(c_rarg2, t1); |
| call_offset = __ call_RT(noreg, noreg, target); |
| } |
| OopMapSet* oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| return oop_maps; |
| } |
| |
| OopMapSet* Runtime1::generate_handle_exception(C1StubId id, StubAssembler *sasm) { |
| __ block_comment("generate_handle_exception"); |
| |
| // incoming parameters |
| const Register exception_oop = x10; |
| const Register exception_pc = x13; |
| |
| OopMapSet* oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| OopMap* oop_map = nullptr; |
| |
| switch (id) { |
| case C1StubId::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 x10 |
| __ ld(exception_oop, Address(xthread, Thread::pending_exception_offset())); |
| __ sd(zr, Address(xthread, Thread::pending_exception_offset())); |
| |
| // load issuing PC (the return address for this stub) into x13 |
| __ ld(exception_pc, Address(fp, frame::return_addr_offset * BytesPerWord)); |
| |
| // make sure that the vm_results are cleared (may be unnecessary) |
| __ sd(zr, Address(xthread, JavaThread::vm_result_oop_offset())); |
| __ sd(zr, Address(xthread, JavaThread::vm_result_metadata_offset())); |
| break; |
| case C1StubId::handle_exception_nofpu_id: |
| case C1StubId::handle_exception_id: |
| // At this point all registers MAY be live. |
| oop_map = save_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id); |
| break; |
| case C1StubId::handle_exception_from_callee_id: { |
| // At this point all registers except exception oop (x10) and |
| // exception pc (ra) 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: ShouldNotReachHere(); |
| } |
| |
| // verify that only x10 and x13 are valid at this time |
| __ invalidate_registers(false, true, true, false, true, true); |
| // verify that x10 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; |
| __ ld(t0, Address(xthread, JavaThread::exception_oop_offset())); |
| __ beqz(t0, oop_empty); |
| __ stop("exception oop already set"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ld(t0, Address(xthread, JavaThread::exception_pc_offset())); |
| __ beqz(t0, 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) |
| __ sd(exception_oop, Address(xthread, JavaThread::exception_oop_offset())); |
| __ sd(exception_pc, Address(xthread, JavaThread::exception_pc_offset())); |
| |
| // patch throwing pc into return address (has bci & oop map) |
| __ sd(exception_pc, Address(fp, frame::return_addr_offset * 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)); |
| guarantee(oop_map != nullptr, "null oop_map!"); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| // x10: 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 x10 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 |
| __ sd(x10, Address(fp, frame::return_addr_offset * BytesPerWord)); |
| |
| switch (id) { |
| case C1StubId::forward_exception_id: |
| case C1StubId::handle_exception_nofpu_id: |
| case C1StubId::handle_exception_id: |
| // Restore the registers that were saved at the beginning. |
| restore_live_registers(sasm, id != C1StubId::handle_exception_nofpu_id); |
| break; |
| case C1StubId::handle_exception_from_callee_id: |
| break; |
| default: ShouldNotReachHere(); |
| } |
| |
| return oop_maps; |
| } |
| |
| |
| void Runtime1::generate_unwind_exception(StubAssembler *sasm) { |
| // incoming parameters |
| const Register exception_oop = x10; |
| // other registers used in this stub |
| const Register handler_addr = x11; |
| |
| if (AbortVMOnException) { |
| __ enter(); |
| save_live_registers(sasm); |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, check_abort_on_vm_exception), x10); |
| restore_live_registers(sasm); |
| __ leave(); |
| } |
| |
| // verify that only x10, 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; |
| __ ld(t0, Address(xthread, JavaThread::exception_oop_offset())); |
| __ beqz(t0, oop_empty); |
| __ stop("exception oop must be empty"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ld(t0, Address(xthread, JavaThread::exception_pc_offset())); |
| __ beqz(t0, 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 |
| __ subi(sp, sp, 2 * wordSize); |
| __ sd(exception_oop, Address(sp, wordSize)); |
| __ sd(ra, Address(sp)); |
| |
| // 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), xthread, ra); |
| // x10: exception handler address of the caller |
| |
| // Only x10 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 |
| __ mv(handler_addr, x10); |
| |
| // get throwing pc (= return address). |
| // ra has been destroyed by the call |
| __ ld(ra, Address(sp)); |
| __ ld(exception_oop, Address(sp, wordSize)); |
| __ addi(sp, sp, 2 * wordSize); |
| __ mv(x13, ra); |
| |
| __ 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!) |
| // x10: exception oop |
| // x13: throwing pc |
| // x11: exception handler |
| __ jr(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 != nullptr, "deoptimization blob must have been created"); |
| |
| OopMap* oop_map = save_live_registers(sasm); |
| assert_cond(oop_map != nullptr); |
| |
| __ mv(c_rarg0, xthread); |
| Label retaddr; |
| __ set_last_Java_frame(sp, fp, retaddr, t0); |
| // do the call |
| __ rt_call(target); |
| __ bind(retaddr); |
| OopMapSet* oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(__ offset(), oop_map); |
| // verify callee-saved register |
| #ifdef ASSERT |
| { Label L; |
| __ get_thread(t0); |
| __ beq(xthread, t0, L); |
| __ stop("StubAssembler::call_RT: xthread not callee saved?"); |
| __ bind(L); |
| } |
| #endif |
| __ reset_last_Java_frame(true); |
| |
| #ifdef ASSERT |
| // Check that fields in JavaThread for exception oop and issuing pc are empty |
| Label oop_empty; |
| __ ld(t0, Address(xthread, Thread::pending_exception_offset())); |
| __ beqz(t0, oop_empty); |
| __ stop("exception oop must be empty"); |
| __ bind(oop_empty); |
| |
| Label pc_empty; |
| __ ld(t0, Address(xthread, JavaThread::exception_pc_offset())); |
| __ beqz(t0, pc_empty); |
| __ stop("exception pc must be empty"); |
| __ bind(pc_empty); |
| #endif |
| |
| // Runtime will return true if the nmethod has been deoptimized, this is the |
| // expected scenario and anything else is an error. Note that we maintain a |
| // check on the result purely as a defensive measure. |
| Label no_deopt; |
| __ beqz(x10, no_deopt); // Have we deoptimized? |
| |
| // Perform a re-execute. The proper return address is already on the stack, |
| // we just need to restore registers, pop all of our frames but the return |
| // address and jump to the deopt blob. |
| |
| restore_live_registers(sasm); |
| __ leave(); |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| |
| __ bind(no_deopt); |
| __ stop("deopt not performed"); |
| |
| return oop_maps; |
| } |
| |
| OopMapSet* Runtime1::generate_code_for(C1StubId id, StubAssembler* sasm) { |
| // for better readability |
| 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 = nullptr; |
| switch (id) { |
| { |
| case C1StubId::forward_exception_id: |
| { |
| oop_maps = generate_handle_exception(id, sasm); |
| __ leave(); |
| __ ret(); |
| } |
| break; |
| |
| case C1StubId::throw_div0_exception_id: |
| { |
| StubFrame f(sasm, "throw_div0_exception", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_div0_exception), false); |
| } |
| break; |
| |
| case C1StubId::throw_null_pointer_exception_id: |
| { StubFrame f(sasm, "throw_null_pointer_exception", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_null_pointer_exception), false); |
| } |
| break; |
| |
| case C1StubId::new_instance_id: |
| case C1StubId::fast_new_instance_id: |
| case C1StubId::fast_new_instance_init_check_id: |
| { |
| Register klass = x13; // Incoming |
| Register obj = x10; // Result |
| |
| if (id == C1StubId::new_instance_id) { |
| __ set_info("new_instance", dont_gc_arguments); |
| } else if (id == C1StubId::fast_new_instance_id) { |
| __ set_info("fast new_instance", dont_gc_arguments); |
| } else { |
| assert(id == C1StubId::fast_new_instance_init_check_id, "bad C1StubId"); |
| __ set_info("fast new_instance init check", dont_gc_arguments); |
| } |
| |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| assert_cond(map != nullptr); |
| int call_offset = __ call_RT(obj, noreg, CAST_FROM_FN_PTR(address, new_instance), klass); |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r10(sasm); |
| __ verify_oop(obj); |
| __ leave(); |
| __ ret(); |
| |
| // x10: new instance |
| } |
| |
| break; |
| |
| case C1StubId::counter_overflow_id: |
| { |
| Register bci = x10; |
| Register method = x11; |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| assert_cond(map != nullptr); |
| |
| const int bci_off = 0; |
| const int method_off = 1; |
| // Retrieve bci |
| __ lw(bci, Address(fp, bci_off * BytesPerWord)); |
| // And a pointer to the Method* |
| __ ld(method, Address(fp, method_off * BytesPerWord)); |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, counter_overflow), bci, method); |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm); |
| __ leave(); |
| __ ret(); |
| } |
| break; |
| |
| case C1StubId::new_type_array_id: |
| case C1StubId::new_object_array_id: |
| { |
| Register length = x9; // Incoming |
| Register klass = x13; // Incoming |
| Register obj = x10; // Result |
| |
| if (id == C1StubId::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 tmp = obj; |
| __ lwu(tmp, Address(klass, Klass::layout_helper_offset())); |
| __ sraiw(tmp, tmp, Klass::_lh_array_tag_shift); |
| int tag = ((id == C1StubId::new_type_array_id) ? Klass::_lh_array_tag_type_value : Klass::_lh_array_tag_obj_value); |
| __ mv(t0, tag); |
| __ beq(t0, tmp, ok); |
| __ stop("assert(is an array klass)"); |
| __ should_not_reach_here(); |
| __ bind(ok); |
| } |
| #endif // ASSERT |
| |
| __ enter(); |
| OopMap* map = save_live_registers(sasm); |
| assert_cond(map != nullptr); |
| int call_offset = 0; |
| if (id == C1StubId::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(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r10(sasm); |
| |
| __ verify_oop(obj); |
| __ leave(); |
| __ ret(); |
| |
| // x10: new array |
| } |
| break; |
| |
| case C1StubId::new_multi_array_id: |
| { |
| StubFrame f(sasm, "new_multi_array", dont_gc_arguments); |
| // x10: klass |
| // x9: rank |
| // x12: address of 1st dimension |
| OopMap* map = save_live_registers(sasm); |
| assert_cond(map != nullptr); |
| __ mv(c_rarg1, x10); |
| __ mv(c_rarg3, x12); |
| __ mv(c_rarg2, x9); |
| int call_offset = __ call_RT(x10, noreg, CAST_FROM_FN_PTR(address, new_multi_array), x11, x12, x13); |
| |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers_except_r10(sasm); |
| |
| // x10: new multi array |
| __ verify_oop(x10); |
| } |
| break; |
| |
| case C1StubId::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 = x15; |
| __ load_klass(t, x10); |
| __ lbu(t, Address(t, Klass::misc_flags_offset())); |
| __ test_bit(t0, t, exact_log2(KlassFlags::_misc_has_finalizer)); |
| __ bnez(t0, register_finalizer); |
| __ ret(); |
| |
| __ bind(register_finalizer); |
| __ enter(); |
| OopMap* oop_map = save_live_registers(sasm); |
| assert_cond(oop_map != nullptr); |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, SharedRuntime::register_finalizer), x10); |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| |
| // Now restore all the live registers |
| restore_live_registers(sasm); |
| |
| __ leave(); |
| __ ret(); |
| } |
| break; |
| |
| case C1StubId::throw_class_cast_exception_id: |
| { |
| StubFrame f(sasm, "throw_class_cast_exception", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_class_cast_exception), true); |
| } |
| break; |
| |
| case C1StubId::throw_incompatible_class_change_error_id: |
| { |
| StubFrame f(sasm, "throw_incompatible_class_cast_exception", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, |
| CAST_FROM_FN_PTR(address, throw_incompatible_class_change_error), false); |
| } |
| break; |
| |
| case C1StubId::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) |
| // jump to slow_subtype_check |
| // Note that the subclass is pushed first, and is therefore deepest. |
| enum layout { |
| x10_off, x10_off_hi, |
| x12_off, x12_off_hi, |
| x14_off, x14_off_hi, |
| x15_off, x15_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_reg(RegSet::of(x10, x12, x14, x15), sp); |
| |
| __ ld(x14, Address(sp, (klass_off) * VMRegImpl::stack_slot_size)); // sub klass |
| __ ld(x10, Address(sp, (sup_k_off) * VMRegImpl::stack_slot_size)); // super klass |
| |
| Label miss; |
| __ check_klass_subtype_slow_path(x14, /*sub_klass*/ |
| x10, /*super_klass*/ |
| x12, /*tmp1_reg*/ |
| x15, /*tmp2_reg*/ |
| nullptr, /*L_success*/ |
| &miss /*L_failure*/); |
| // Need extras for table lookup: x7, x11, x13 |
| |
| // fallthrough on success: |
| __ mv(t0, 1); |
| __ sd(t0, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result |
| __ pop_reg(RegSet::of(x10, x12, x14, x15), sp); |
| __ ret(); |
| |
| __ bind(miss); |
| __ sd(zr, Address(sp, (result_off) * VMRegImpl::stack_slot_size)); // result |
| __ pop_reg(RegSet::of(x10, x12, x14, x15), sp); |
| __ ret(); |
| } |
| break; |
| |
| case C1StubId::monitorenter_nofpu_id: |
| save_fpu_registers = false; |
| // fall through |
| case C1StubId::monitorenter_id: |
| { |
| StubFrame f(sasm, "monitorenter", dont_gc_arguments, requires_pop_epilogue_return); |
| OopMap* map = save_live_registers(sasm, save_fpu_registers); |
| assert_cond(map != nullptr); |
| |
| // Called with store_parameter and not C abi |
| f.load_argument(1, x10); // x10: object |
| f.load_argument(0, x11); // x11: lock address |
| |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, monitorenter), x10, x11); |
| |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm, save_fpu_registers); |
| } |
| break; |
| |
| case C1StubId::is_instance_of_id: |
| { |
| // Mirror: x10 |
| // Object: x11 |
| // Temps: x13, x14, x15, x16, x17 |
| // Result: x10 |
| |
| // Get the Klass* into x16 |
| Register klass = x16, obj = x11, result = x10; |
| __ ld(klass, Address(x10, java_lang_Class::klass_offset())); |
| |
| Label fail, is_secondary, success; |
| |
| __ beqz(klass, fail); // Klass is null |
| __ beqz(obj, fail); // obj is null |
| |
| __ lwu(x13, Address(klass, in_bytes(Klass::super_check_offset_offset()))); |
| __ mv(x17, in_bytes(Klass::secondary_super_cache_offset())); |
| __ beq(x13, x17, is_secondary); // Klass is a secondary superclass |
| |
| // Klass is a concrete class |
| __ load_klass(x15, obj); |
| __ add(x17, x15, x13); |
| __ ld(x17, Address(x17)); |
| __ beq(klass, x17, success); |
| __ mv(result, 0); |
| __ ret(); |
| |
| __ bind(is_secondary); |
| __ load_klass(obj, obj); |
| |
| // This is necessary because I am never in my own secondary_super list. |
| __ beq(obj, klass, success); |
| |
| __ lookup_secondary_supers_table_var(obj, klass, result, x13, x14, x15, x17, &success); |
| |
| __ bind(fail); |
| __ mv(result, 0); |
| __ ret(); |
| |
| __ bind(success); |
| __ mv(result, 1); |
| __ ret(); |
| } |
| break; |
| |
| case C1StubId::monitorexit_nofpu_id: |
| save_fpu_registers = false; |
| // fall through |
| case C1StubId::monitorexit_id: |
| { |
| StubFrame f(sasm, "monitorexit", dont_gc_arguments); |
| OopMap* map = save_live_registers(sasm, save_fpu_registers); |
| assert_cond(map != nullptr); |
| |
| // Called with store_parameter and not C abi |
| f.load_argument(0, x10); // x10: 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), x10); |
| |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm, save_fpu_registers); |
| } |
| break; |
| |
| case C1StubId::deoptimize_id: |
| { |
| StubFrame f(sasm, "deoptimize", dont_gc_arguments, does_not_return); |
| OopMap* oop_map = save_live_registers(sasm); |
| assert_cond(oop_map != nullptr); |
| 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(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, oop_map); |
| restore_live_registers(sasm); |
| DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
| assert(deopt_blob != nullptr, "deoptimization blob must have been created"); |
| __ leave(); |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| } |
| break; |
| |
| case C1StubId::throw_range_check_failed_id: |
| { |
| StubFrame f(sasm, "range_check_failed", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_range_check_exception), true); |
| } |
| break; |
| |
| case C1StubId::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 C1StubId::access_field_patching_id: |
| { |
| StubFrame f(sasm, "access_field_patching", dont_gc_arguments, does_not_return); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, access_field_patching)); |
| } |
| break; |
| |
| case C1StubId::load_klass_patching_id: |
| { |
| StubFrame f(sasm, "load_klass_patching", dont_gc_arguments, does_not_return); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_klass_patching)); |
| } |
| break; |
| |
| case C1StubId::load_mirror_patching_id: |
| { |
| StubFrame f(sasm, "load_mirror_patching", dont_gc_arguments, does_not_return); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_mirror_patching)); |
| } |
| break; |
| |
| case C1StubId::load_appendix_patching_id: |
| { |
| StubFrame f(sasm, "load_appendix_patching", dont_gc_arguments, does_not_return); |
| // we should set up register map |
| oop_maps = generate_patching(sasm, CAST_FROM_FN_PTR(address, move_appendix_patching)); |
| } |
| break; |
| |
| case C1StubId::handle_exception_nofpu_id: |
| case C1StubId::handle_exception_id: |
| { |
| StubFrame f(sasm, "handle_exception", dont_gc_arguments); |
| oop_maps = generate_handle_exception(id, sasm); |
| } |
| break; |
| |
| case C1StubId::handle_exception_from_callee_id: |
| { |
| StubFrame f(sasm, "handle_exception_from_callee", dont_gc_arguments); |
| oop_maps = generate_handle_exception(id, sasm); |
| } |
| break; |
| |
| case C1StubId::throw_index_exception_id: |
| { |
| StubFrame f(sasm, "index_range_check_failed", dont_gc_arguments, does_not_return); |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_index_exception), true); |
| } |
| break; |
| |
| case C1StubId::throw_array_store_exception_id: |
| { |
| StubFrame f(sasm, "throw_array_store_exception", dont_gc_arguments, does_not_return); |
| // tos + 0: link |
| // + 1: return address |
| oop_maps = generate_exception_throw(sasm, CAST_FROM_FN_PTR(address, throw_array_store_exception), true); |
| } |
| break; |
| |
| case C1StubId::predicate_failed_trap_id: |
| { |
| StubFrame f(sasm, "predicate_failed_trap", dont_gc_arguments, does_not_return); |
| |
| OopMap* map = save_live_registers(sasm); |
| assert_cond(map != nullptr); |
| |
| int call_offset = __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, predicate_failed_trap)); |
| oop_maps = new OopMapSet(); |
| assert_cond(oop_maps != nullptr); |
| oop_maps->add_gc_map(call_offset, map); |
| restore_live_registers(sasm); |
| __ leave(); |
| DeoptimizationBlob* deopt_blob = SharedRuntime::deopt_blob(); |
| assert(deopt_blob != nullptr, "deoptimization blob must have been created"); |
| |
| __ far_jump(RuntimeAddress(deopt_blob->unpack_with_reexecution())); |
| } |
| break; |
| |
| case C1StubId::dtrace_object_alloc_id: |
| { // c_rarg0: object |
| StubFrame f(sasm, "dtrace_object_alloc", dont_gc_arguments); |
| save_live_registers(sasm); |
| |
| __ call_VM_leaf(CAST_FROM_FN_PTR(address, static_cast<int (*)(oopDesc*)>(SharedRuntime::dtrace_object_alloc)), c_rarg0); |
| |
| restore_live_registers(sasm); |
| } |
| break; |
| |
| default: |
| { |
| StubFrame f(sasm, "unimplemented entry", dont_gc_arguments, does_not_return); |
| __ mv(x10, (int)id); |
| __ call_RT(noreg, noreg, CAST_FROM_FN_PTR(address, unimplemented_entry), x10); |
| __ should_not_reach_here(); |
| } |
| break; |
| } |
| } |
| return oop_maps; |
| } |
| |
| #undef __ |
| |
| const char *Runtime1::pd_name_for_address(address entry) { Unimplemented(); } |
