--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/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 ---------------