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annotate src/share/vm/c1/c1_FrameMap.cpp @ 3500:6111c168756f
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author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 08 Aug 2011 15:19:09 +0200 |
parents | 1d1603768966 |
children | 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "c1/c1_FrameMap.hpp" | |
27 #include "c1/c1_LIR.hpp" | |
28 #include "runtime/sharedRuntime.hpp" | |
29 #ifdef TARGET_ARCH_x86 | |
30 # include "vmreg_x86.inline.hpp" | |
31 #endif | |
32 #ifdef TARGET_ARCH_sparc | |
33 # include "vmreg_sparc.inline.hpp" | |
34 #endif | |
35 #ifdef TARGET_ARCH_zero | |
36 # include "vmreg_zero.inline.hpp" | |
37 #endif | |
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38 #ifdef TARGET_ARCH_arm |
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39 # include "vmreg_arm.inline.hpp" |
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40 #endif |
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41 #ifdef TARGET_ARCH_ppc |
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42 # include "vmreg_ppc.inline.hpp" |
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43 #endif |
0 | 44 |
45 | |
46 | |
47 //----------------------------------------------------- | |
48 | |
49 // Convert method signature into an array of BasicTypes for the arguments | |
50 BasicTypeArray* FrameMap::signature_type_array_for(const ciMethod* method) { | |
51 ciSignature* sig = method->signature(); | |
52 BasicTypeList* sta = new BasicTypeList(method->arg_size()); | |
53 // add receiver, if any | |
54 if (!method->is_static()) sta->append(T_OBJECT); | |
55 // add remaining arguments | |
56 for (int i = 0; i < sig->count(); i++) { | |
57 ciType* type = sig->type_at(i); | |
58 BasicType t = type->basic_type(); | |
59 if (t == T_ARRAY) { | |
60 t = T_OBJECT; | |
61 } | |
62 sta->append(t); | |
63 } | |
64 // done | |
65 return sta; | |
66 } | |
67 | |
68 | |
69 CallingConvention* FrameMap::java_calling_convention(const BasicTypeArray* signature, bool outgoing) { | |
70 // compute the size of the arguments first. The signature array | |
71 // that java_calling_convention takes includes a T_VOID after double | |
72 // work items but our signatures do not. | |
73 int i; | |
74 int sizeargs = 0; | |
75 for (i = 0; i < signature->length(); i++) { | |
76 sizeargs += type2size[signature->at(i)]; | |
77 } | |
78 | |
79 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); | |
80 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); | |
81 int sig_index = 0; | |
82 for (i = 0; i < sizeargs; i++, sig_index++) { | |
83 sig_bt[i] = signature->at(sig_index); | |
84 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
85 sig_bt[i + 1] = T_VOID; | |
86 i++; | |
87 } | |
88 } | |
89 | |
90 intptr_t out_preserve = SharedRuntime::java_calling_convention(sig_bt, regs, sizeargs, outgoing); | |
91 LIR_OprList* args = new LIR_OprList(signature->length()); | |
92 for (i = 0; i < sizeargs;) { | |
93 BasicType t = sig_bt[i]; | |
94 assert(t != T_VOID, "should be skipping these"); | |
95 | |
96 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); | |
97 args->append(opr); | |
98 if (opr->is_address()) { | |
99 LIR_Address* addr = opr->as_address_ptr(); | |
100 assert(addr->disp() == (int)addr->disp(), "out of range value"); | |
2093 | 101 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
0 | 102 } |
103 i += type2size[t]; | |
104 } | |
105 assert(args->length() == signature->length(), "size mismatch"); | |
106 out_preserve += SharedRuntime::out_preserve_stack_slots(); | |
107 | |
108 if (outgoing) { | |
109 // update the space reserved for arguments. | |
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110 update_reserved_argument_area_size(out_preserve * BytesPerWord); |
0 | 111 } |
112 return new CallingConvention(args, out_preserve); | |
113 } | |
114 | |
115 | |
116 CallingConvention* FrameMap::c_calling_convention(const BasicTypeArray* signature) { | |
117 // compute the size of the arguments first. The signature array | |
118 // that java_calling_convention takes includes a T_VOID after double | |
119 // work items but our signatures do not. | |
120 int i; | |
121 int sizeargs = 0; | |
122 for (i = 0; i < signature->length(); i++) { | |
123 sizeargs += type2size[signature->at(i)]; | |
124 } | |
125 | |
126 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, sizeargs); | |
127 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, sizeargs); | |
128 int sig_index = 0; | |
129 for (i = 0; i < sizeargs; i++, sig_index++) { | |
130 sig_bt[i] = signature->at(sig_index); | |
131 if (sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
132 sig_bt[i + 1] = T_VOID; | |
133 i++; | |
134 } | |
135 } | |
136 | |
137 intptr_t out_preserve = SharedRuntime::c_calling_convention(sig_bt, regs, sizeargs); | |
138 LIR_OprList* args = new LIR_OprList(signature->length()); | |
139 for (i = 0; i < sizeargs;) { | |
140 BasicType t = sig_bt[i]; | |
141 assert(t != T_VOID, "should be skipping these"); | |
142 | |
143 // C calls are always outgoing | |
144 bool outgoing = true; | |
145 LIR_Opr opr = map_to_opr(t, regs + i, outgoing); | |
146 // they might be of different types if for instance floating point | |
147 // values are passed in cpu registers, but the sizes must match. | |
148 assert(type2size[opr->type()] == type2size[t], "type mismatch"); | |
149 args->append(opr); | |
150 if (opr->is_address()) { | |
151 LIR_Address* addr = opr->as_address_ptr(); | |
2093 | 152 out_preserve = MAX2(out_preserve, (intptr_t)(addr->disp() - STACK_BIAS) / 4); |
0 | 153 } |
154 i += type2size[t]; | |
155 } | |
156 assert(args->length() == signature->length(), "size mismatch"); | |
157 out_preserve += SharedRuntime::out_preserve_stack_slots(); | |
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158 update_reserved_argument_area_size(out_preserve * BytesPerWord); |
0 | 159 return new CallingConvention(args, out_preserve); |
160 } | |
161 | |
162 | |
163 //-------------------------------------------------------- | |
164 // FrameMap | |
165 //-------------------------------------------------------- | |
166 | |
167 bool FrameMap::_init_done = false; | |
168 Register FrameMap::_cpu_rnr2reg [FrameMap::nof_cpu_regs]; | |
169 int FrameMap::_cpu_reg2rnr [FrameMap::nof_cpu_regs]; | |
170 | |
171 | |
172 FrameMap::FrameMap(ciMethod* method, int monitors, int reserved_argument_area_size) { | |
1584 | 173 assert(_init_done, "should already be completed"); |
0 | 174 |
175 _framesize = -1; | |
176 _num_spills = -1; | |
177 | |
178 assert(monitors >= 0, "not set"); | |
179 _num_monitors = monitors; | |
180 assert(reserved_argument_area_size >= 0, "not set"); | |
181 _reserved_argument_area_size = MAX2(4, reserved_argument_area_size) * BytesPerWord; | |
182 | |
183 _argcount = method->arg_size(); | |
184 _argument_locations = new intArray(_argcount, -1); | |
185 _incoming_arguments = java_calling_convention(signature_type_array_for(method), false); | |
186 _oop_map_arg_count = _incoming_arguments->reserved_stack_slots(); | |
187 | |
188 int java_index = 0; | |
189 for (int i = 0; i < _incoming_arguments->length(); i++) { | |
190 LIR_Opr opr = _incoming_arguments->at(i); | |
191 if (opr->is_address()) { | |
192 LIR_Address* address = opr->as_address_ptr(); | |
193 _argument_locations->at_put(java_index, address->disp() - STACK_BIAS); | |
194 _incoming_arguments->args()->at_put(i, LIR_OprFact::stack(java_index, as_BasicType(as_ValueType(address->type())))); | |
195 } | |
196 java_index += type2size[opr->type()]; | |
197 } | |
198 | |
199 } | |
200 | |
201 | |
202 bool FrameMap::finalize_frame(int nof_slots) { | |
203 assert(nof_slots >= 0, "must be positive"); | |
204 assert(_num_spills == -1, "can only be set once"); | |
205 _num_spills = nof_slots; | |
206 assert(_framesize == -1, "should only be calculated once"); | |
207 _framesize = round_to(in_bytes(sp_offset_for_monitor_base(0)) + | |
208 _num_monitors * sizeof(BasicObjectLock) + | |
209 sizeof(intptr_t) + // offset of deopt orig pc | |
210 frame_pad_in_bytes, | |
211 StackAlignmentInBytes) / 4; | |
212 int java_index = 0; | |
213 for (int i = 0; i < _incoming_arguments->length(); i++) { | |
214 LIR_Opr opr = _incoming_arguments->at(i); | |
215 if (opr->is_stack()) { | |
216 _argument_locations->at_put(java_index, in_bytes(framesize_in_bytes()) + | |
217 _argument_locations->at(java_index)); | |
218 } | |
219 java_index += type2size[opr->type()]; | |
220 } | |
221 // make sure it's expressible on the platform | |
222 return validate_frame(); | |
223 } | |
224 | |
225 VMReg FrameMap::sp_offset2vmreg(ByteSize offset) const { | |
226 int offset_in_bytes = in_bytes(offset); | |
227 assert(offset_in_bytes % 4 == 0, "must be multiple of 4 bytes"); | |
228 assert(offset_in_bytes / 4 < framesize() + oop_map_arg_count(), "out of range"); | |
229 return VMRegImpl::stack2reg(offset_in_bytes / 4); | |
230 } | |
231 | |
232 | |
233 bool FrameMap::location_for_sp_offset(ByteSize byte_offset_from_sp, | |
234 Location::Type loc_type, | |
235 Location* loc) const { | |
236 int offset = in_bytes(byte_offset_from_sp); | |
237 assert(offset >= 0, "incorrect offset"); | |
238 if (!Location::legal_offset_in_bytes(offset)) { | |
239 return false; | |
240 } | |
241 Location tmp_loc = Location::new_stk_loc(loc_type, offset); | |
242 *loc = tmp_loc; | |
243 return true; | |
244 } | |
245 | |
246 | |
247 bool FrameMap::locations_for_slot (int index, Location::Type loc_type, | |
248 Location* loc, Location* second) const { | |
249 ByteSize offset_from_sp = sp_offset_for_slot(index); | |
250 if (!location_for_sp_offset(offset_from_sp, loc_type, loc)) { | |
251 return false; | |
252 } | |
253 if (second != NULL) { | |
254 // two word item | |
255 offset_from_sp = offset_from_sp + in_ByteSize(4); | |
256 return location_for_sp_offset(offset_from_sp, loc_type, second); | |
257 } | |
258 return true; | |
259 } | |
260 | |
261 ////////////////////// | |
262 // Public accessors // | |
263 ////////////////////// | |
264 | |
265 | |
266 ByteSize FrameMap::sp_offset_for_slot(const int index) const { | |
267 if (index < argcount()) { | |
268 int offset = _argument_locations->at(index); | |
269 assert(offset != -1, "not a memory argument"); | |
270 assert(offset >= framesize() * 4, "argument inside of frame"); | |
271 return in_ByteSize(offset); | |
272 } | |
273 ByteSize offset = sp_offset_for_spill(index - argcount()); | |
274 assert(in_bytes(offset) < framesize() * 4, "spill outside of frame"); | |
275 return offset; | |
276 } | |
277 | |
278 | |
279 ByteSize FrameMap::sp_offset_for_double_slot(const int index) const { | |
280 ByteSize offset = sp_offset_for_slot(index); | |
281 if (index >= argcount()) { | |
282 assert(in_bytes(offset) + 4 < framesize() * 4, "spill outside of frame"); | |
283 } | |
284 return offset; | |
285 } | |
286 | |
287 | |
288 ByteSize FrameMap::sp_offset_for_spill(const int index) const { | |
289 assert(index >= 0 && index < _num_spills, "out of range"); | |
290 int offset = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + | |
291 index * spill_slot_size_in_bytes; | |
292 return in_ByteSize(offset); | |
293 } | |
294 | |
295 ByteSize FrameMap::sp_offset_for_monitor_base(const int index) const { | |
296 int end_of_spills = round_to(first_available_sp_in_frame + _reserved_argument_area_size, sizeof(double)) + | |
297 _num_spills * spill_slot_size_in_bytes; | |
304 | 298 int offset = (int) round_to(end_of_spills, HeapWordSize) + index * sizeof(BasicObjectLock); |
0 | 299 return in_ByteSize(offset); |
300 } | |
301 | |
302 ByteSize FrameMap::sp_offset_for_monitor_lock(int index) const { | |
303 check_monitor_index(index); | |
304 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::lock_offset_in_bytes());; | |
305 } | |
306 | |
307 ByteSize FrameMap::sp_offset_for_monitor_object(int index) const { | |
308 check_monitor_index(index); | |
309 return sp_offset_for_monitor_base(index) + in_ByteSize(BasicObjectLock::obj_offset_in_bytes()); | |
310 } | |
311 | |
312 void FrameMap::print_frame_layout() const { | |
313 int svar; | |
314 tty->print_cr("#####################################"); | |
315 tty->print_cr("Frame size in words %d", framesize()); | |
316 | |
317 if( _num_monitors > 0) { | |
318 tty->print_cr("monitor [0]:%d | [%2d]:%d", | |
319 in_bytes(sp_offset_for_monitor_base(0)), | |
320 in_bytes(sp_offset_for_monitor_base(_num_monitors))); | |
321 } | |
322 if( _num_spills > 0) { | |
323 svar = _num_spills - 1; | |
324 if(svar == 0) | |
325 tty->print_cr("spill [0]:%d", in_bytes(sp_offset_for_spill(0))); | |
326 else | |
327 tty->print_cr("spill [0]:%d | [%2d]:%d", in_bytes(sp_offset_for_spill(0)), | |
328 svar, | |
329 in_bytes(sp_offset_for_spill(svar))); | |
330 } | |
331 } | |
332 | |
333 | |
334 // For OopMaps, map a local variable or spill index to an VMReg. | |
335 // This is the offset from sp() in the frame of the slot for the index, | |
336 // skewed by SharedInfo::stack0 to indicate a stack location (vs.a register.) | |
337 // | |
338 // C ABI size + | |
339 // framesize + framesize + | |
340 // stack0 stack0 stack0 0 <- VMReg->value() | |
341 // | | | <registers> | | |
342 // ..........|..............|..............|.............| | |
343 // 0 1 2 3 | <C ABI area> | 4 5 6 ...... | <- local indices | |
344 // ^ ^ sp() | |
345 // | | | |
346 // arguments non-argument locals | |
347 | |
348 | |
349 VMReg FrameMap::regname(LIR_Opr opr) const { | |
350 if (opr->is_single_cpu()) { | |
351 assert(!opr->is_virtual(), "should not see virtual registers here"); | |
352 return opr->as_register()->as_VMReg(); | |
353 } else if (opr->is_single_stack()) { | |
354 return sp_offset2vmreg(sp_offset_for_slot(opr->single_stack_ix())); | |
355 } else if (opr->is_address()) { | |
356 LIR_Address* addr = opr->as_address_ptr(); | |
357 assert(addr->base() == stack_pointer(), "sp based addressing only"); | |
358 return sp_offset2vmreg(in_ByteSize(addr->index()->as_jint())); | |
359 } | |
360 ShouldNotReachHere(); | |
361 return VMRegImpl::Bad(); | |
362 } | |
363 | |
364 | |
365 | |
366 | |
367 // ------------ extra spill slots --------------- |