| /* |
| * Copyright (c) 2000, 2013, Oracle and/or its affiliates. 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 "c1/c1_FrameMap.hpp" |
| #include "c1/c1_LIR.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #ifdef TARGET_ARCH_x86 |
| # include "vmreg_x86.inline.hpp" |
| #endif |
| #ifdef TARGET_ARCH_sparc |
| # include "vmreg_sparc.inline.hpp" |
| #endif |
| #ifdef TARGET_ARCH_zero |
| # include "vmreg_zero.inline.hpp" |
| #endif |
| #ifdef TARGET_ARCH_arm |
| # include "vmreg_arm.inline.hpp" |
| #endif |
| #ifdef TARGET_ARCH_ppc |
| # include "vmreg_ppc.inline.hpp" |
| #endif |
| |
| |
| |
| //----------------------------------------------------- |
| |
| // Convert method signature into an array of BasicTypes for the arguments |
| BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) { |
| ciSignature* sig = method->signature(); |
| BasicTypeList* sta = new BasicTypeList(method->arg_size()); |
| // add receiver, if any |
| if (!method->is_static()) sta->append(T_OBJECT); |
| // add remaining arguments |
| for (int i = 0; i < sig->count(); i++) { |
| ciType* type = sig->type_at(i); |
| BasicType t = type->basic_type(); |
| if (t == T_ARRAY) { |
| t = T_OBJECT; |
| } |
| sta->append(t); |
| } |
| // done |
| return sta; |
| } |
| |
| |
| CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) { |
| // compute the size of the arguments first. The signature array |
| // that java_calling_convention takes includes a T_VOID after double |
| // work items but our signatures do not. |
| int i; |
| int sizeargs = 0; |
| for (i = 0; i < signature->length(); i++) { |
| sizeargs += type2size[signature->at(i)]; |
| } |
| |
| BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
| VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
| int sig_index = 0; |
| for (i = 0; i < sizeargs; i++, sig_index++) { |
| sig_bt[i] = signature->at(sig_index); |
| if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { |
| sig_bt[i + 1] = T_VOID; |
| i++; |
| } |
| } |
| |
| intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing); |
| LIR_OprList* args = new LIR_OprList(signature->length()); |
| for (i = 0; i < sizeargs;) { |
| BasicType t = sig_bt[i]; |
| assert(t != T_VOID, "should be skipping these"); |
| LIR_Opr opr = map_to_opr(t, regs + i, outgoing); |
| args->append(opr); |
| if (opr->is_address()) { |
| LIR_Address* addr = opr->as_address_ptr(); |
| assert(addr->disp() == (int)addr->disp(), "out of range value"); |
| out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
| } |
| i += type2size[t]; |
| } |
| assert(args->length() == signature->length(), "size mismatch"); |
| out_preserve += SharedRuntime::out_preserve_stack_slots(); |
| |
| if (outgoing) { |
| // update the space reserved for arguments. |
| update_reserved_argument_area_size(out_preserve * BytesPerWord); |
| } |
| return new CallingConvention(args, out_preserve); |
| } |
| |
| |
| CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) { |
| // compute the size of the arguments first. The signature array |
| // that java_calling_convention takes includes a T_VOID after double |
| // work items but our signatures do not. |
| int i; |
| int sizeargs = 0; |
| for (i = 0; i < signature->length(); i++) { |
| sizeargs += type2size[signature->at(i)]; |
| } |
| |
| BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); |
| VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); |
| int sig_index = 0; |
| for (i = 0; i < sizeargs; i++, sig_index++) { |
| sig_bt[i] = signature->at(sig_index); |
| if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { |
| sig_bt[i + 1] = T_VOID; |
| i++; |
| } |
| } |
| |
| intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs); |
| LIR_OprList* args = new LIR_OprList(signature->length()); |
| for (i = 0; i < sizeargs;) { |
| BasicType t = sig_bt[i]; |
| assert(t != T_VOID, "should be skipping these"); |
| |
| // C calls are always outgoing |
| bool outgoing = true; |
| LIR_Opr opr = map_to_opr(t, regs + i, outgoing); |
| // they might be of different types if for instance floating point |
| // values are passed in cpu registers, but the sizes must match. |
| assert(type2size[opr->type()] == type2size[t], "type mismatch"); |
| args->append(opr); |
| if (opr->is_address()) { |
| LIR_Address* addr = opr->as_address_ptr(); |
| out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
| } |
| i += type2size[t]; |
| } |
| assert(args->length() == signature->length(), "size mismatch"); |
| out_preserve += SharedRuntime::out_preserve_stack_slots(); |
| update_reserved_argument_area_size(out_preserve * BytesPerWord); |
| return new CallingConvention(args, out_preserve); |
| } |
| |
| |
| //-------------------------------------------------------- |
| // FrameMap |
| //-------------------------------------------------------- |
| |
| bool FrameMap::_init_done = false; |
| Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs]; |
| int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs]; |
| |
| |
| FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) { |
| assert(_init_done, "should already be completed"); |
| |
| _framesize = -1; |
| _num_spills = -1; |
| |
| assert(monitors >= 0, "not set"); |
| _num_monitors = monitors; |
| assert(reserved_argument_area_size >= 0, "not set"); |
| _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord; |
| |
| _argcount = method->arg_size(); |
| _argument_locations = new intArray(_argcount, -1); |
| _incoming_arguments = java_calling_convention(signature_type_array_for(method), false); |
| _oop_map_arg_count = _incoming_arguments->reserved_stack_slots(); |
| |
| int java_index = 0; |
| for (int i = 0; i < _incoming_arguments->length(); i++) { |
| LIR_Opr opr = _incoming_arguments->at(i); |
| if (opr->is_address()) { |
| LIR_Address* address = opr->as_address_ptr(); |
| _argument_locations->at_put(java_index, address->disp() - STACK_BIAS); |
| _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type())))); |
| } |
| java_index += type2size[opr->type()]; |
| } |
| |
| } |
| |
| |
| bool FrameMap::finalize_frame(int nof_slots) { |
| assert(nof_slots >= 0, "must be positive"); |
| assert(_num_spills == -1, "can only be set once"); |
| _num_spills = nof_slots; |
| assert(_framesize == -1, "should only be calculated once"); |
| _framesize = round_to(in_bytes(sp_offset_for_monitor_base(0)) + |
| _num_monitors * sizeof(BasicObjectLock) + |
| sizeof(intptr_t) + // offset of deopt orig pc |
| frame_pad_in_bytes, |
| StackAlignmentInBytes) / 4; |
| int java_index = 0; |
| for (int i = 0; i < _incoming_arguments->length(); i++) { |
| LIR_Opr opr = _incoming_arguments->at(i); |
| if (opr->is_stack()) { |
| _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) + |
| _argument_locations->at(java_index)); |
| } |
| java_index += type2size[opr->type()]; |
| } |
| // make sure it's expressible on the platform |
| return validate_frame(); |
| } |
| |
| VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const { |
| int offset_in_bytes = in_bytes(offset); |
| assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes"); |
| assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range"); |
| return VMRegImpl::stack2reg(offset_in_bytes / 4); |
| } |
| |
| |
| bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp, |
| Location::Type loc_type, |
| Location* loc) const { |
| int offset = in_bytes(byte_offset_from_sp); |
| assert(offset >= 0, "incorrect offset"); |
| if (!Location::legal_offset_in_bytes(offset)) { |
| return false; |
| } |
| Location tmp_loc = Location::new_stk_loc(loc_type, offset); |
| *loc = tmp_loc; |
| return true; |
| } |
| |
| |
| bool FrameMap::locations_for_slot (int index, Location::Type loc_type, |
| Location* loc, Location* second) const { |
| ByteSize offset_from_sp = sp_offset_for_slot(index); |
| if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) { |
| return false; |
| } |
| if (second != NULL) { |
| // two word item |
| offset_from_sp = offset_from_sp + in_ByteSize(4); |
| return location_for_sp_offset(offset_from_sp, loc_type, second); |
| } |
| return true; |
| } |
| |
| ////////////////////// |
| // Public accessors // |
| ////////////////////// |
| |
| |
| ByteSize FrameMap::sp_offset_for_slot(const int index) const { |
| if (index < argcount()) { |
| int offset = _argument_locations->at(index); |
| assert(offset != -1, "not a memory argument"); |
| assert(offset >= framesize() * 4, "argument inside of frame"); |
| return in_ByteSize(offset); |
| } |
| ByteSize offset = sp_offset_for_spill(index - argcount()); |
| assert(in_bytes(offset) < framesize() * 4, "spill outside of frame"); |
| return offset; |
| } |
| |
| |
| ByteSize FrameMap::sp_offset_for_double_slot(const int index) const { |
| ByteSize offset = sp_offset_for_slot(index); |
| if (index >= argcount()) { |
| assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame"); |
| } |
| return offset; |
| } |
| |
| |
| ByteSize FrameMap::sp_offset_for_spill(const int index) const { |
| assert(index >= 0 && index < _num_spills, "out of range"); |
| int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + |
| index * spill_slot_size_in_bytes; |
| return in_ByteSize(offset); |
| } |
| |
| ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const { |
| int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + |
| _num_spills * spill_slot_size_in_bytes; |
| int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock); |
| return in_ByteSize(offset); |
| } |
| |
| ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const { |
| check_monitor_index(index); |
| return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());; |
| } |
| |
| ByteSize FrameMap::sp_offset_for_monitor_object(int index) const { |
| check_monitor_index(index); |
| return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes()); |
| } |
| |
| |
| // For OopMaps, map a local variable or spill index to an VMReg. |
| // This is the offset from sp() in the frame of the slot for the index, |
| // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.) |
| // |
| // C ABI size + |
| // framesize + framesize + |
| // stack0 stack0 stack0 0 <- VMReg->value() |
| // | | | <registers> | |
| // ..........|..............|..............|.............| |
| // 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices |
| // ^ ^ sp() |
| // | | |
| // arguments non-argument locals |
| |
| |
| VMReg FrameMap::regname(LIR_Opr opr) const { |
| if (opr->is_single_cpu()) { |
| assert(!opr->is_virtual(), "should not see virtual registers here"); |
| return opr->as_register()->as_VMReg(); |
| } else if (opr->is_single_stack()) { |
| return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix())); |
| } else if (opr->is_address()) { |
| LIR_Address* addr = opr->as_address_ptr(); |
| assert(addr->base() == stack_pointer(), "sp based addressing only"); |
| return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint())); |
| } |
| ShouldNotReachHere(); |
| return VMRegImpl::Bad(); |
| } |
| |
| |
| |
| |
| // ------------ extra spill slots --------------- |