Mercurial > hg > graal-jvmci-8
diff src/share/vm/c1/c1_FrameMap.cpp @ 0:a61af66fc99e jdk7-b24
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author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
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children | dc7f315e41f7 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/vm/c1/c1_FrameMap.cpp Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,350 @@ +/* + * Copyright 2000-2006 Sun Microsystems, 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +# include "incls/_precompiled.incl" +# include "incls/_c1_FrameMap.cpp.incl" + + + +//----------------------------------------------------- + +// 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() / 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); + } + 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, 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() / 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); + 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) { + if (!_init_done) init(); + + _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 = 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()); +} + +void FrameMap::print_frame_layout() const { + int svar; + tty->print_cr("#####################################"); + tty->print_cr("Frame size in words %d", framesize()); + + if( _num_monitors > 0) { + tty->print_cr("monitor [0]:%d | [%2d]:%d", + in_bytes(sp_offset_for_monitor_base(0)), + in_bytes(sp_offset_for_monitor_base(_num_monitors))); + } + if( _num_spills > 0) { + svar = _num_spills - 1; + if(svar == 0) + tty->print_cr("spill [0]:%d", in_bytes(sp_offset_for_spill(0))); + else + tty->print_cr("spill [0]:%d | [%2d]:%d", in_bytes(sp_offset_for_spill(0)), + svar, + in_bytes(sp_offset_for_spill(svar))); + } +} + + +// 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 ---------------