1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/src/share/vm/c1/c1_FrameMap.cpp Wed Apr 27 01:25:04 2016 +0800
1.3 @@ -0,0 +1,345 @@
1.4 +/*
1.5 + * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + *
1.26 + */
1.27 +
1.28 +#include "precompiled.hpp"
1.29 +#include "c1/c1_FrameMap.hpp"
1.30 +#include "c1/c1_LIR.hpp"
1.31 +#include "runtime/sharedRuntime.hpp"
1.32 +#ifdef TARGET_ARCH_x86
1.33 +# include "vmreg_x86.inline.hpp"
1.34 +#endif
1.35 +#ifdef TARGET_ARCH_sparc
1.36 +# include "vmreg_sparc.inline.hpp"
1.37 +#endif
1.38 +#ifdef TARGET_ARCH_zero
1.39 +# include "vmreg_zero.inline.hpp"
1.40 +#endif
1.41 +#ifdef TARGET_ARCH_arm
1.42 +# include "vmreg_arm.inline.hpp"
1.43 +#endif
1.44 +#ifdef TARGET_ARCH_ppc
1.45 +# include "vmreg_ppc.inline.hpp"
1.46 +#endif
1.47 +
1.48 +
1.49 +
1.50 +//-----------------------------------------------------
1.51 +
1.52 +// Convert method signature into an array of BasicTypes for the arguments
1.53 +BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) {
1.54 + ciSignature* sig = method->signature();
1.55 + BasicTypeList* sta = new BasicTypeList(method->arg_size());
1.56 + // add receiver, if any
1.57 + if (!method->is_static()) sta->append(T_OBJECT);
1.58 + // add remaining arguments
1.59 + for (int i = 0; i < sig->count(); i++) {
1.60 + ciType* type = sig->type_at(i);
1.61 + BasicType t = type->basic_type();
1.62 + if (t == T_ARRAY) {
1.63 + t = T_OBJECT;
1.64 + }
1.65 + sta->append(t);
1.66 + }
1.67 + // done
1.68 + return sta;
1.69 +}
1.70 +
1.71 +
1.72 +CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) {
1.73 + // compute the size of the arguments first. The signature array
1.74 + // that java_calling_convention takes includes a T_VOID after double
1.75 + // work items but our signatures do not.
1.76 + int i;
1.77 + int sizeargs = 0;
1.78 + for (i = 0; i < signature->length(); i++) {
1.79 + sizeargs += type2size[signature->at(i)];
1.80 + }
1.81 +
1.82 + BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
1.83 + VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
1.84 + int sig_index = 0;
1.85 + for (i = 0; i < sizeargs; i++, sig_index++) {
1.86 + sig_bt[i] = signature->at(sig_index);
1.87 + if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
1.88 + sig_bt[i + 1] = T_VOID;
1.89 + i++;
1.90 + }
1.91 + }
1.92 +
1.93 + intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing);
1.94 + LIR_OprList* args = new LIR_OprList(signature->length());
1.95 + for (i = 0; i < sizeargs;) {
1.96 + BasicType t = sig_bt[i];
1.97 + assert(t != T_VOID, "should be skipping these");
1.98 + LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
1.99 + args->append(opr);
1.100 + if (opr->is_address()) {
1.101 + LIR_Address* addr = opr->as_address_ptr();
1.102 + assert(addr->disp() == (int)addr->disp(), "out of range value");
1.103 + out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4);
1.104 + }
1.105 + i += type2size[t];
1.106 + }
1.107 + assert(args->length() == signature->length(), "size mismatch");
1.108 + out_preserve += SharedRuntime::out_preserve_stack_slots();
1.109 +
1.110 + if (outgoing) {
1.111 + // update the space reserved for arguments.
1.112 + update_reserved_argument_area_size(out_preserve * BytesPerWord);
1.113 + }
1.114 + return new CallingConvention(args, out_preserve);
1.115 +}
1.116 +
1.117 +
1.118 +CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) {
1.119 + // compute the size of the arguments first. The signature array
1.120 + // that java_calling_convention takes includes a T_VOID after double
1.121 + // work items but our signatures do not.
1.122 + int i;
1.123 + int sizeargs = 0;
1.124 + for (i = 0; i < signature->length(); i++) {
1.125 + sizeargs += type2size[signature->at(i)];
1.126 + }
1.127 +
1.128 + BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs);
1.129 + VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs);
1.130 + int sig_index = 0;
1.131 + for (i = 0; i < sizeargs; i++, sig_index++) {
1.132 + sig_bt[i] = signature->at(sig_index);
1.133 + if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) {
1.134 + sig_bt[i + 1] = T_VOID;
1.135 + i++;
1.136 + }
1.137 + }
1.138 +
1.139 + intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, NULL, sizeargs);
1.140 + LIR_OprList* args = new LIR_OprList(signature->length());
1.141 + for (i = 0; i < sizeargs;) {
1.142 + BasicType t = sig_bt[i];
1.143 + assert(t != T_VOID, "should be skipping these");
1.144 +
1.145 + // C calls are always outgoing
1.146 + bool outgoing = true;
1.147 + LIR_Opr opr = map_to_opr(t, regs + i, outgoing);
1.148 + // they might be of different types if for instance floating point
1.149 + // values are passed in cpu registers, but the sizes must match.
1.150 + assert(type2size[opr->type()] == type2size[t], "type mismatch");
1.151 + args->append(opr);
1.152 + if (opr->is_address()) {
1.153 + LIR_Address* addr = opr->as_address_ptr();
1.154 + out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4);
1.155 + }
1.156 + i += type2size[t];
1.157 + }
1.158 + assert(args->length() == signature->length(), "size mismatch");
1.159 + out_preserve += SharedRuntime::out_preserve_stack_slots();
1.160 + update_reserved_argument_area_size(out_preserve * BytesPerWord);
1.161 + return new CallingConvention(args, out_preserve);
1.162 +}
1.163 +
1.164 +
1.165 +//--------------------------------------------------------
1.166 +// FrameMap
1.167 +//--------------------------------------------------------
1.168 +
1.169 +bool FrameMap::_init_done = false;
1.170 +Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs];
1.171 +int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs];
1.172 +
1.173 +
1.174 +FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) {
1.175 + assert(_init_done, "should already be completed");
1.176 +
1.177 + _framesize = -1;
1.178 + _num_spills = -1;
1.179 +
1.180 + assert(monitors >= 0, "not set");
1.181 + _num_monitors = monitors;
1.182 + assert(reserved_argument_area_size >= 0, "not set");
1.183 + _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord;
1.184 +
1.185 + _argcount = method->arg_size();
1.186 + _argument_locations = new intArray(_argcount, -1);
1.187 + _incoming_arguments = java_calling_convention(signature_type_array_for(method), false);
1.188 + _oop_map_arg_count = _incoming_arguments->reserved_stack_slots();
1.189 +
1.190 + int java_index = 0;
1.191 + for (int i = 0; i < _incoming_arguments->length(); i++) {
1.192 + LIR_Opr opr = _incoming_arguments->at(i);
1.193 + if (opr->is_address()) {
1.194 + LIR_Address* address = opr->as_address_ptr();
1.195 + _argument_locations->at_put(java_index, address->disp() - STACK_BIAS);
1.196 + _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type()))));
1.197 + }
1.198 + java_index += type2size[opr->type()];
1.199 + }
1.200 +
1.201 +}
1.202 +
1.203 +
1.204 +bool FrameMap::finalize_frame(int nof_slots) {
1.205 + assert(nof_slots >= 0, "must be positive");
1.206 + assert(_num_spills == -1, "can only be set once");
1.207 + _num_spills = nof_slots;
1.208 + assert(_framesize == -1, "should only be calculated once");
1.209 + _framesize = round_to(in_bytes(sp_offset_for_monitor_base(0)) +
1.210 + _num_monitors * sizeof(BasicObjectLock) +
1.211 + sizeof(intptr_t) + // offset of deopt orig pc
1.212 + frame_pad_in_bytes,
1.213 + StackAlignmentInBytes) / 4;
1.214 + int java_index = 0;
1.215 + for (int i = 0; i < _incoming_arguments->length(); i++) {
1.216 + LIR_Opr opr = _incoming_arguments->at(i);
1.217 + if (opr->is_stack()) {
1.218 + _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) +
1.219 + _argument_locations->at(java_index));
1.220 + }
1.221 + java_index += type2size[opr->type()];
1.222 + }
1.223 + // make sure it's expressible on the platform
1.224 + return validate_frame();
1.225 +}
1.226 +
1.227 +VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const {
1.228 + int offset_in_bytes = in_bytes(offset);
1.229 + assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes");
1.230 + assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range");
1.231 + return VMRegImpl::stack2reg(offset_in_bytes / 4);
1.232 +}
1.233 +
1.234 +
1.235 +bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp,
1.236 + Location::Type loc_type,
1.237 + Location* loc) const {
1.238 + int offset = in_bytes(byte_offset_from_sp);
1.239 + assert(offset >= 0, "incorrect offset");
1.240 + if (!Location::legal_offset_in_bytes(offset)) {
1.241 + return false;
1.242 + }
1.243 + Location tmp_loc = Location::new_stk_loc(loc_type, offset);
1.244 + *loc = tmp_loc;
1.245 + return true;
1.246 +}
1.247 +
1.248 +
1.249 +bool FrameMap::locations_for_slot (int index, Location::Type loc_type,
1.250 + Location* loc, Location* second) const {
1.251 + ByteSize offset_from_sp = sp_offset_for_slot(index);
1.252 + if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) {
1.253 + return false;
1.254 + }
1.255 + if (second != NULL) {
1.256 + // two word item
1.257 + offset_from_sp = offset_from_sp + in_ByteSize(4);
1.258 + return location_for_sp_offset(offset_from_sp, loc_type, second);
1.259 + }
1.260 + return true;
1.261 +}
1.262 +
1.263 +//////////////////////
1.264 +// Public accessors //
1.265 +//////////////////////
1.266 +
1.267 +
1.268 +ByteSize FrameMap::sp_offset_for_slot(const int index) const {
1.269 + if (index < argcount()) {
1.270 + int offset = _argument_locations->at(index);
1.271 + assert(offset != -1, "not a memory argument");
1.272 + assert(offset >= framesize() * 4, "argument inside of frame");
1.273 + return in_ByteSize(offset);
1.274 + }
1.275 + ByteSize offset = sp_offset_for_spill(index - argcount());
1.276 + assert(in_bytes(offset) < framesize() * 4, "spill outside of frame");
1.277 + return offset;
1.278 +}
1.279 +
1.280 +
1.281 +ByteSize FrameMap::sp_offset_for_double_slot(const int index) const {
1.282 + ByteSize offset = sp_offset_for_slot(index);
1.283 + if (index >= argcount()) {
1.284 + assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame");
1.285 + }
1.286 + return offset;
1.287 +}
1.288 +
1.289 +
1.290 +ByteSize FrameMap::sp_offset_for_spill(const int index) const {
1.291 + assert(index >= 0 && index < _num_spills, "out of range");
1.292 + int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) +
1.293 + index * spill_slot_size_in_bytes;
1.294 + return in_ByteSize(offset);
1.295 +}
1.296 +
1.297 +ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const {
1.298 + int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) +
1.299 + _num_spills * spill_slot_size_in_bytes;
1.300 + int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock);
1.301 + return in_ByteSize(offset);
1.302 +}
1.303 +
1.304 +ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const {
1.305 + check_monitor_index(index);
1.306 + return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());;
1.307 +}
1.308 +
1.309 +ByteSize FrameMap::sp_offset_for_monitor_object(int index) const {
1.310 + check_monitor_index(index);
1.311 + return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes());
1.312 +}
1.313 +
1.314 +
1.315 +// For OopMaps, map a local variable or spill index to an VMReg.
1.316 +// This is the offset from sp() in the frame of the slot for the index,
1.317 +// skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.)
1.318 +//
1.319 +// C ABI size +
1.320 +// framesize + framesize +
1.321 +// stack0 stack0 stack0 0 <- VMReg->value()
1.322 +// | | | <registers> |
1.323 +// ..........|..............|..............|.............|
1.324 +// 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices
1.325 +// ^ ^ sp()
1.326 +// | |
1.327 +// arguments non-argument locals
1.328 +
1.329 +
1.330 +VMReg FrameMap::regname(LIR_Opr opr) const {
1.331 + if (opr->is_single_cpu()) {
1.332 + assert(!opr->is_virtual(), "should not see virtual registers here");
1.333 + return opr->as_register()->as_VMReg();
1.334 + } else if (opr->is_single_stack()) {
1.335 + return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix()));
1.336 + } else if (opr->is_address()) {
1.337 + LIR_Address* addr = opr->as_address_ptr();
1.338 + assert(addr->base() == stack_pointer(), "sp based addressing only");
1.339 + return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint()));
1.340 + }
1.341 + ShouldNotReachHere();
1.342 + return VMRegImpl::Bad();
1.343 +}
1.344 +
1.345 +
1.346 +
1.347 +
1.348 +// ------------ extra spill slots ---------------
