duke@435: /*
mikael@4153:  * Copyright (c) 2000, 2012, Oracle and/or its affiliates. All rights reserved.
duke@435:  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
duke@435:  *
duke@435:  * This code is free software; you can redistribute it and/or modify it
duke@435:  * under the terms of the GNU General Public License version 2 only, as
duke@435:  * published by the Free Software Foundation.
duke@435:  *
duke@435:  * This code is distributed in the hope that it will be useful, but WITHOUT
duke@435:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
duke@435:  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
duke@435:  * version 2 for more details (a copy is included in the LICENSE file that
duke@435:  * accompanied this code).
duke@435:  *
duke@435:  * You should have received a copy of the GNU General Public License version
duke@435:  * 2 along with this work; if not, write to the Free Software Foundation,
duke@435:  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
duke@435:  *
trims@1907:  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
trims@1907:  * or visit www.oracle.com if you need additional information or have any
trims@1907:  * questions.
duke@435:  *
duke@435:  */
duke@435: 
stefank@2314: #include "precompiled.hpp"
stefank@2314: #include "c1/c1_FrameMap.hpp"
stefank@2314: #include "c1/c1_LIR.hpp"
stefank@2314: #include "runtime/sharedRuntime.hpp"
stefank@2314: #ifdef TARGET_ARCH_x86
stefank@2314: # include "vmreg_x86.inline.hpp"
stefank@2314: #endif
stefank@2314: #ifdef TARGET_ARCH_sparc
stefank@2314: # include "vmreg_sparc.inline.hpp"
stefank@2314: #endif
stefank@2314: #ifdef TARGET_ARCH_zero
stefank@2314: # include "vmreg_zero.inline.hpp"
stefank@2314: #endif
bobv@2508: #ifdef TARGET_ARCH_arm
bobv@2508: # include "vmreg_arm.inline.hpp"
bobv@2508: #endif
bobv@2508: #ifdef TARGET_ARCH_ppc
bobv@2508: # include "vmreg_ppc.inline.hpp"
bobv@2508: #endif
duke@435: 
duke@435: 
duke@435: 
duke@435: //-----------------------------------------------------
duke@435: 
duke@435: // Convert method signature into an array of BasicTypes for the arguments
duke@435: BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) {
duke@435:   ciSignature* sig = method->signature();
duke@435:   BasicTypeList* sta = new BasicTypeList(method->arg_size());
duke@435:   // add receiver, if any
duke@435:   if (!method->is_static()) sta->append(T_OBJECT);
duke@435:   // add remaining arguments
duke@435:   for (int i = 0; i < sig->count(); i++) {
duke@435:     ciType* type = sig->type_at(i);
duke@435:     BasicType t = type->basic_type();
duke@435:     if (t == T_ARRAY) {
duke@435:       t = T_OBJECT;
duke@435:     }
duke@435:     sta->append(t);
duke@435:   }
duke@435:   // done
duke@435:   return sta;
duke@435: }
duke@435: 
duke@435: 
duke@435: CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) {
duke@435:   // compute the size of the arguments first.  The signature array
duke@435:   // that java_calling_convention takes includes a T_VOID after double
duke@435:   // work items but our signatures do not.
duke@435:   int i;
duke@435:   int sizeargs = 0;
duke@435:   for (i = 0; i < signature->length(); i++) {
duke@435:     sizeargs += type2size[signature->at(i)];
duke@435:   }
duke@435: 
duke@435:   BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
duke@435:   VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
duke@435:   int sig_index = 0;
duke@435:   for (i = 0; i < sizeargs; i++, sig_index++) {
duke@435:     sig_bt[i] = signature->at(sig_index);
duke@435:     if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
duke@435:       sig_bt[i + 1] = T_VOID;
duke@435:       i++;
duke@435:     }
duke@435:   }
duke@435: 
duke@435:   intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing);
duke@435:   LIR_OprList* args = new LIR_OprList(signature->length());
duke@435:   for (i = 0; i < sizeargs;) {
duke@435:     BasicType t = sig_bt[i];
duke@435:     assert(t != T_VOID, "should be skipping these");
duke@435:     LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
duke@435:     args->append(opr);
duke@435:     if (opr->is_address()) {
duke@435:       LIR_Address* addr = opr->as_address_ptr();
duke@435:       assert(addr->disp() == (int)addr->disp(), "out of range value");
iveresov@2416:       out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4);
duke@435:     }
duke@435:     i += type2size[t];
duke@435:   }
duke@435:   assert(args->length() == signature->length(), "size mismatch");
duke@435:   out_preserve += SharedRuntime::out_preserve_stack_slots();
duke@435: 
duke@435:   if (outgoing) {
duke@435:     // update the space reserved for arguments.
bobv@2036:     update_reserved_argument_area_size(out_preserve * BytesPerWord);
duke@435:   }
duke@435:   return new CallingConvention(args, out_preserve);
duke@435: }
duke@435: 
duke@435: 
duke@435: CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) {
duke@435:   // compute the size of the arguments first.  The signature array
duke@435:   // that java_calling_convention takes includes a T_VOID after double
duke@435:   // work items but our signatures do not.
duke@435:   int i;
duke@435:   int sizeargs = 0;
duke@435:   for (i = 0; i < signature->length(); i++) {
duke@435:     sizeargs += type2size[signature->at(i)];
duke@435:   }
duke@435: 
duke@435:   BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
duke@435:   VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
duke@435:   int sig_index = 0;
duke@435:   for (i = 0; i < sizeargs; i++, sig_index++) {
duke@435:     sig_bt[i] = signature->at(sig_index);
duke@435:     if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
duke@435:       sig_bt[i + 1] = T_VOID;
duke@435:       i++;
duke@435:     }
duke@435:   }
duke@435: 
goetz@6466:   intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs);
duke@435:   LIR_OprList* args = new LIR_OprList(signature->length());
duke@435:   for (i = 0; i < sizeargs;) {
duke@435:     BasicType t = sig_bt[i];
duke@435:     assert(t != T_VOID, "should be skipping these");
duke@435: 
duke@435:     // C calls are always outgoing
duke@435:     bool outgoing = true;
duke@435:     LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
duke@435:     // they might be of different types if for instance floating point
duke@435:     // values are passed in cpu registers, but the sizes must match.
duke@435:     assert(type2size[opr->type()] == type2size[t], "type mismatch");
duke@435:     args->append(opr);
duke@435:     if (opr->is_address()) {
duke@435:       LIR_Address* addr = opr->as_address_ptr();
iveresov@2416:       out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4);
duke@435:     }
duke@435:     i += type2size[t];
duke@435:   }
duke@435:   assert(args->length() == signature->length(), "size mismatch");
duke@435:   out_preserve += SharedRuntime::out_preserve_stack_slots();
bobv@2036:   update_reserved_argument_area_size(out_preserve * BytesPerWord);
duke@435:   return new CallingConvention(args, out_preserve);
duke@435: }
duke@435: 
duke@435: 
duke@435: //--------------------------------------------------------
duke@435: //               FrameMap
duke@435: //--------------------------------------------------------
duke@435: 
duke@435: bool      FrameMap::_init_done = false;
duke@435: Register  FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs];
duke@435: int       FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs];
duke@435: 
duke@435: 
duke@435: FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) {
iveresov@1939:   assert(_init_done, "should already be completed");
duke@435: 
duke@435:   _framesize = -1;
duke@435:   _num_spills = -1;
duke@435: 
duke@435:   assert(monitors >= 0, "not set");
duke@435:   _num_monitors = monitors;
duke@435:   assert(reserved_argument_area_size >= 0, "not set");
duke@435:   _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord;
duke@435: 
duke@435:   _argcount = method->arg_size();
duke@435:   _argument_locations = new intArray(_argcount, -1);
duke@435:   _incoming_arguments = java_calling_convention(signature_type_array_for(method), false);
duke@435:   _oop_map_arg_count = _incoming_arguments->reserved_stack_slots();
duke@435: 
duke@435:   int java_index = 0;
duke@435:   for (int i = 0; i < _incoming_arguments->length(); i++) {
duke@435:     LIR_Opr opr = _incoming_arguments->at(i);
duke@435:     if (opr->is_address()) {
duke@435:       LIR_Address* address = opr->as_address_ptr();
duke@435:       _argument_locations->at_put(java_index, address->disp() - STACK_BIAS);
duke@435:       _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type()))));
duke@435:     }
duke@435:     java_index += type2size[opr->type()];
duke@435:   }
duke@435: 
duke@435: }
duke@435: 
duke@435: 
duke@435: bool FrameMap::finalize_frame(int nof_slots) {
duke@435:   assert(nof_slots >= 0, "must be positive");
duke@435:   assert(_num_spills == -1, "can only be set once");
duke@435:   _num_spills = nof_slots;
duke@435:   assert(_framesize == -1, "should only be calculated once");
duke@435:   _framesize =  round_to(in_bytes(sp_offset_for_monitor_base(0)) +
duke@435:                          _num_monitors * sizeof(BasicObjectLock) +
duke@435:                          sizeof(intptr_t) +                        // offset of deopt orig pc
duke@435:                          frame_pad_in_bytes,
duke@435:                          StackAlignmentInBytes) / 4;
duke@435:   int java_index = 0;
duke@435:   for (int i = 0; i < _incoming_arguments->length(); i++) {
duke@435:     LIR_Opr opr = _incoming_arguments->at(i);
duke@435:     if (opr->is_stack()) {
duke@435:       _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) +
duke@435:                                   _argument_locations->at(java_index));
duke@435:     }
duke@435:     java_index += type2size[opr->type()];
duke@435:   }
duke@435:   // make sure it's expressible on the platform
duke@435:   return validate_frame();
duke@435: }
duke@435: 
duke@435: VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const {
duke@435:   int offset_in_bytes = in_bytes(offset);
duke@435:   assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes");
duke@435:   assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range");
duke@435:   return VMRegImpl::stack2reg(offset_in_bytes / 4);
duke@435: }
duke@435: 
duke@435: 
duke@435: bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp,
duke@435:                                       Location::Type loc_type,
duke@435:                                       Location* loc) const {
duke@435:   int offset = in_bytes(byte_offset_from_sp);
duke@435:   assert(offset >= 0, "incorrect offset");
duke@435:   if (!Location::legal_offset_in_bytes(offset)) {
duke@435:     return false;
duke@435:   }
duke@435:   Location tmp_loc = Location::new_stk_loc(loc_type, offset);
duke@435:   *loc = tmp_loc;
duke@435:   return true;
duke@435: }
duke@435: 
duke@435: 
duke@435: bool FrameMap::locations_for_slot  (int index, Location::Type loc_type,
duke@435:                                      Location* loc, Location* second) const {
duke@435:   ByteSize offset_from_sp = sp_offset_for_slot(index);
duke@435:   if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) {
duke@435:     return false;
duke@435:   }
duke@435:   if (second != NULL) {
duke@435:     // two word item
duke@435:     offset_from_sp = offset_from_sp + in_ByteSize(4);
duke@435:     return location_for_sp_offset(offset_from_sp, loc_type, second);
duke@435:   }
duke@435:   return true;
duke@435: }
duke@435: 
duke@435: //////////////////////
duke@435: // Public accessors //
duke@435: //////////////////////
duke@435: 
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_slot(const int index) const {
duke@435:   if (index < argcount()) {
duke@435:     int offset = _argument_locations->at(index);
duke@435:     assert(offset != -1, "not a memory argument");
duke@435:     assert(offset >= framesize() * 4, "argument inside of frame");
duke@435:     return in_ByteSize(offset);
duke@435:   }
duke@435:   ByteSize offset = sp_offset_for_spill(index - argcount());
duke@435:   assert(in_bytes(offset) < framesize() * 4, "spill outside of frame");
duke@435:   return offset;
duke@435: }
duke@435: 
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_double_slot(const int index) const {
duke@435:   ByteSize offset = sp_offset_for_slot(index);
duke@435:   if (index >= argcount()) {
duke@435:     assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame");
duke@435:   }
duke@435:   return offset;
duke@435: }
duke@435: 
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_spill(const int index) const {
duke@435:   assert(index >= 0 && index < _num_spills, "out of range");
duke@435:   int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) +
duke@435:     index * spill_slot_size_in_bytes;
duke@435:   return in_ByteSize(offset);
duke@435: }
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const {
duke@435:   int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) +
duke@435:     _num_spills * spill_slot_size_in_bytes;
never@739:   int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock);
duke@435:   return in_ByteSize(offset);
duke@435: }
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const {
duke@435:   check_monitor_index(index);
duke@435:   return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());;
duke@435: }
duke@435: 
duke@435: ByteSize FrameMap::sp_offset_for_monitor_object(int index) const {
duke@435:   check_monitor_index(index);
duke@435:   return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes());
duke@435: }
duke@435: 
duke@435: 
duke@435: // For OopMaps, map a local variable or spill index to an VMReg.
duke@435: // This is the offset from sp() in the frame of the slot for the index,
duke@435: // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.)
duke@435: //
duke@435: //         C ABI size +
duke@435: //         framesize +     framesize +
duke@435: //         stack0          stack0         stack0          0 <- VMReg->value()
duke@435: //            |              |              | <registers> |
duke@435: //  ..........|..............|..............|.............|
duke@435: //    0 1 2 3 | <C ABI area> | 4 5 6 ...... |               <- local indices
duke@435: //    ^                        ^          sp()
duke@435: //    |                        |
duke@435: //  arguments            non-argument locals
duke@435: 
duke@435: 
duke@435: VMReg FrameMap::regname(LIR_Opr opr) const {
duke@435:   if (opr->is_single_cpu()) {
duke@435:     assert(!opr->is_virtual(), "should not see virtual registers here");
duke@435:     return opr->as_register()->as_VMReg();
duke@435:   } else if (opr->is_single_stack()) {
duke@435:     return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix()));
duke@435:   } else if (opr->is_address()) {
duke@435:     LIR_Address* addr = opr->as_address_ptr();
duke@435:     assert(addr->base() == stack_pointer(), "sp based addressing only");
duke@435:     return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint()));
duke@435:   }
duke@435:   ShouldNotReachHere();
duke@435:   return VMRegImpl::Bad();
duke@435: }
duke@435: 
duke@435: 
duke@435: 
duke@435: 
duke@435: // ------------ extra spill slots ---------------