1 /* 2 * Copyright (c) 2019, 2026, Oracle and/or its affiliates. All rights reserved. 3 * Copyright (c) 2026 SAP SE. All rights reserved. 4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 5 * 6 * This code is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License version 2 only, as 8 * published by the Free Software Foundation. 9 * 10 * This code is distributed in the hope that it will be useful, but WITHOUT 11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 13 * version 2 for more details (a copy is included in the LICENSE file that 14 * accompanied this code). 15 * 16 * You should have received a copy of the GNU General Public License version 17 * 2 along with this work; if not, write to the Free Software Foundation, 18 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 19 * 20 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 21 * or visit www.oracle.com if you need additional information or have any 22 * questions. 23 * 24 */ 25 26 #ifndef CPU_PPC_CONTINUATION_PPC_INLINE_HPP 27 #define CPU_PPC_CONTINUATION_PPC_INLINE_HPP 28 29 #include "oops/stackChunkOop.inline.hpp" 30 #include "runtime/frame.hpp" 31 #include "runtime/frame.inline.hpp" 32 33 inline void patch_callee_link(const frame& f, intptr_t* fp) { 34 *ContinuationHelper::Frame::callee_link_address(f) = fp; 35 } 36 37 inline void patch_callee_link_relative(const frame& f, intptr_t* fp) { 38 intptr_t* la = (intptr_t*)ContinuationHelper::Frame::callee_link_address(f); 39 intptr_t new_value = fp - la; 40 *la = new_value; 41 } 42 43 ////// Freeze 44 45 // Fast path 46 47 inline void FreezeBase::patch_stack_pd(intptr_t* frame_sp, intptr_t* heap_sp) { 48 // Nothing to do. The backchain is reconstructed when thawing (see Thaw<ConfigT>::patch_caller_links()) 49 } 50 51 // Slow path 52 53 template<typename FKind> 54 inline frame FreezeBase::sender(const frame& f) { 55 assert(FKind::is_instance(f), ""); 56 if (FKind::interpreted) { 57 return frame(f.sender_sp(), f.sender_pc(), f.interpreter_frame_sender_sp()); 58 } 59 60 assert(f.cb() == nullptr || !f.cb()->is_nmethod() || !f.cb()->as_nmethod()->needs_stack_repair(), 61 "unsupported"); 62 63 intptr_t* sender_sp = f.sender_sp(); 64 address sender_pc = f.sender_pc(); 65 assert(sender_sp != f.sp(), "must have changed"); 66 67 int slot = 0; 68 CodeBlob* sender_cb = CodeCache::find_blob_and_oopmap(sender_pc, slot); 69 return sender_cb != nullptr 70 ? frame(sender_sp, sender_sp, nullptr, sender_pc, sender_cb, slot == -1 ? nullptr : sender_cb->oop_map_for_slot(slot, sender_pc)) 71 : frame(sender_sp, sender_pc, sender_sp); 72 } 73 74 void FreezeBase::adjust_interpreted_frame_unextended_sp(frame& f) { 75 // nothing to do 76 } 77 78 inline void FreezeBase::prepare_freeze_interpreted_top_frame(frame& f) { 79 // Nothing to do. We don't save a last sp since we cannot use sp as esp. 80 // Instead the top frame is trimmed when making an i2i call. The original 81 // top_frame_sp is set when the frame is pushed (see generate_fixed_frame()). 82 // An interpreter top frame that was just thawed is resized to top_frame_sp by the 83 // resume adapter (see generate_cont_resume_interpreter_adapter()). So the assertion is 84 // false, if we freeze again right after thawing as we do when redoing a vm call wasn't 85 // successful. 86 assert(_thread->interp_redoing_vm_call() || 87 ((intptr_t*)f.at_relative(ijava_idx(top_frame_sp)) == f.unextended_sp()), 88 "top_frame_sp:" PTR_FORMAT " usp:" PTR_FORMAT, f.at_relative(ijava_idx(top_frame_sp)), p2i(f.unextended_sp())); 89 } 90 91 inline void FreezeBase::relativize_interpreted_frame_metadata(const frame& f, const frame& hf) { 92 intptr_t* vfp = f.fp(); 93 intptr_t* hfp = hf.fp(); 94 assert(f.fp() > (intptr_t*)f.interpreter_frame_esp(), ""); 95 96 // There is alignment padding between vfp and f's locals array in the original 97 // frame, because we freeze the padding (see recurse_freeze_interpreted_frame) 98 // in order to keep the same relativized locals pointer, we don't need to change it here. 99 100 // Make sure that monitors is already relativized. 101 assert(hf.at_absolute(ijava_idx(monitors)) <= -(frame::ijava_state_size / wordSize), ""); 102 103 // Make sure that esp is already relativized. 104 assert(hf.at_absolute(ijava_idx(esp)) <= hf.at_absolute(ijava_idx(monitors)), ""); 105 106 // top_frame_sp is already relativized 107 108 // hfp == hf.sp() + (f.fp() - f.sp()) is not true on ppc because the stack frame has room for 109 // the maximal expression stack and the expression stack in the heap frame is trimmed. 110 assert(hf.fp() == hf.interpreter_frame_esp() + (f.fp() - f.interpreter_frame_esp()), ""); 111 assert(hf.fp() <= (intptr_t*)hf.at(ijava_idx(locals)), ""); 112 } 113 114 inline void FreezeBase::set_top_frame_metadata_pd(const frame& hf) { 115 stackChunkOop chunk = _cont.tail(); 116 assert(chunk->is_in_chunk(hf.sp()), "hf.sp()=" PTR_FORMAT, p2i(hf.sp())); 117 118 hf.own_abi()->lr = (uint64_t)hf.pc(); 119 if (hf.is_interpreted_frame()) { 120 patch_callee_link_relative(hf, hf.fp()); 121 } 122 #ifdef ASSERT 123 else { 124 // See also FreezeBase::patch_pd() 125 patch_callee_link(hf, (intptr_t*)badAddress); 126 } 127 #endif 128 } 129 130 // 131 // Heap frames differ from stack frames in the following aspects 132 // 133 // - they are just word aligned 134 // - the unextended sp of interpreted frames is set such that 135 // unextended sp + frame::metadata_words_at_top + 1 points to the last call parameter 136 // (the comment at the file end explains the unextended sp for interpreted frames on the stack) 137 // 138 // The difference in respect to the unextended sp is required to comply with shared code. 139 // Furthermore fast frozen and compiled frames have invalid back links (see 140 // Thaw<ConfigT>::patch_caller_links() and FreezeBase::patch_pd()) 141 // 142 // === New Interpreted Frame ========================================================================================== 143 // 144 // ### Interpreted Caller: Overlap new frame with Caller 145 // 146 // Caller on entry New frame with resized Caller 147 // 148 // | frame::java_abi | | | 149 // | |<- FP of caller | Caller's SP |<- FP of caller 150 // ========================== ========================== 151 // | ijava_state | | ijava_state | 152 // | | | | 153 // |------------------------| ----- |------------------------| 154 // | P0 | ^ | L0 aka P0 | 155 // | : | | | : : | 156 // | Pn |<- unext. SP | | : Pn |<- unext. SP 157 // |------------------------| + metadata overlap | : | + metadata 158 // | frame::java_abi | | | Lm | 159 // | (metadata_words_at_top)|<- SP == unext. SP v |------------------------|<- unextended SP of caller (1) 160 // ========================== of caller ----- | frame::java_abi | 161 // | (metadata_words_at_top)|<- new SP of caller / FP of new frame 162 // overlap = stack_argsize(f) ========================== ^ 163 // + frame::metadata_words_at_top | ijava_state | | 164 // | | | 165 // Where f is the frame to be relocated on the heap. |------------------------| | 166 // See also StackChunkFrameStream::frame_size(). | Expressions | FP - esp of f 167 // | P0 | | 168 // | : | | 169 // | Growth | | Pi | v 170 // v v |------------------------| --- 171 // | frame::java_abi | 172 // | (metadata_words_at_top)|<- unextended SP / 173 // ========================== SP of new frame 174 // ### Compiled Caller: No Overlap 175 // 176 // The caller is resized to accomodate the callee's locals and abi but there is _no_ overlap with 177 // the original caller frame. 178 // 179 // Caller on entry New frame with resized Caller 180 // 181 // | frame::java_abi | | | 182 // | (metadata_words_at_top)|<- FP of caller | Caller's SP |<- FP of caller 183 // ========================== ========================== 184 // | | | | 185 // | | | | 186 // |------------------------| |------------------------| 187 // | frame::java_abi | | frame::java_abi | 188 // | (metadata_words_at_top)|<- SP == unext. SP | (metadata_words_at_top)|<- unext. SP of caller 189 // ========================== of caller |------------------------| 190 // | L0 aka P0 | 191 // | : : | 192 // | : Pn | 193 // overlap = 0 | Lm | 194 // |------------------------| 195 // f is the frame to be relocated on the heap | frame::java_abi | 196 // | (metadata_words_at_top)|<- new SP of caller / FP of new frame 197 // ========================== ^ 198 // | ijava_state | | 199 // | Growth | | | | 200 // v v |------------------------| | 201 // | Expressions | FP - esp of f 202 // | P0 | | 203 // | : | | 204 // | Pi | v 205 // |------------------------| --- 206 // | frame::java_abi | 207 // | (metadata_words_at_top)|<- unextended SP / 208 // ========================== SP of new frame 209 // 210 // (1) Caller's unextended SP is preserved in callee's frame::ijava_state::sender_sp 211 // (See ContinuationHelper::InterpretedFrame::patch_sender_sp). This is required 212 // by StackChunkFrameStream<frame_kind>::next_for_interpreter_frame(). 213 // 214 // === New Compiled Frame ============================================================================================= 215 // 216 // ### Interpreted Caller: No Overlap 217 // 218 // The caller is resized to accomodate the callee's stack arguments and abi but there is _no_ overlap with 219 // the original caller frame. 220 // 221 // Note: a new ABI is added to the caller even if there are no stackargs. 222 // This is necessary to comply with shared code. 223 // 224 // Caller on entry New frame with resized Caller 225 // 226 // | frame::java_abi | | frame::java_abi | 227 // | (metadata_words_at_top)|<- FP of caller | (metadata_words_at_top)|<- FP of caller 228 // ========================== ========================== 229 // | ijava_state | | ijava_state | 230 // | | | | 231 // |------------------------| |------------------------| 232 // | P0 | | P0 | 233 // | : | | : | 234 // | Pn |<- unext. SP | Pn |<- unext. SP 235 // |------------------------| + metadata |------------------------| + metadata 236 // | frame::java_abi | | frame::java_abi | 237 // | (metadata_words_at_top)|<- SP == unext. SP | (metadata_words_at_top)|<- unextended SP of caller (1) 238 // ========================== of caller |------------------------| 239 // | Stack Args | 240 // overlap = 0 | (if any) | 241 // |------------------------| 242 // f is the frame to be relocated on the heap | frame::java_abi | 243 // | (metadata_words_at_top)|<- new SP of caller / FP of new frame 244 // ========================== 245 // | | 246 // | Growth | | | 247 // v v |------------------------| 248 // | frame::java_abi | 249 // | (metadata_words_at_top)|<- SP == unext. SP of new frame 250 // ========================== 251 // 252 // ### Compiled Caller: Stackargs + ABI Overlap 253 // 254 // Caller on entry New frame with resized Caller 255 // 256 // | frame::java_abi | | frame::java_abi | 257 // | (metadata_words_at_top)|<- FP of caller | (metadata_words_at_top)|<- FP of caller 258 // ========================== ========================== 259 // | | | | 260 // | | | | 261 // |------------------------| ----- |------------------------| 262 // | Stack Args | ^ | Stack Args | 263 // | (if any) | | | (if any) | 264 // |------------------------| overlap |------------------------| 265 // | frame::java_abi | | | frame::java_abi | 266 // | (metadata_words_at_top)|<- SP == unext. SP v | (metadata_words_at_top)|<- SP == unext. SP of caller 267 // ========================== of caller ----- ========================== / FP of new frame 268 // | | 269 // overlap = stack_argsize(f) | | 270 // + frame::metadata_words_at_top |------------------------| 271 // | frame::java_abi | 272 // Where f is the frame to be relocated on the heap. | (metadata_words_at_top)|<- SP == unext. SP of new frame 273 // See also StackChunkFrameStream::frame_size(). ========================== 274 // 275 template<typename FKind> 276 frame FreezeBase::new_heap_frame(frame& f, frame& caller, int size_adjust) { 277 assert(size_adjust == 0, "unsupported"); 278 assert(FKind::is_instance(f), ""); 279 280 intptr_t *sp, *fp; 281 if (FKind::interpreted) { 282 intptr_t locals_offset = *f.addr_at(ijava_idx(locals)); 283 // If the caller.is_empty(), i.e. we're freezing into an empty chunk, then we set 284 // the chunk's argsize in finalize_freeze and make room for it above the unextended_sp 285 // See also comment on StackChunkFrameStream<frame_kind>::interpreter_frame_size() 286 int overlap = 287 (caller.is_interpreted_frame() || caller.is_empty()) 288 ? ContinuationHelper::InterpretedFrame::stack_argsize(f) + frame::metadata_words_at_top 289 : 0; 290 fp = caller.unextended_sp() - 1 - locals_offset + overlap; 291 // esp points one slot below the last argument 292 intptr_t* x86_64_like_unextended_sp = f.interpreter_frame_esp() + 1 - frame::metadata_words_at_top; 293 sp = fp - (f.fp() - x86_64_like_unextended_sp); 294 295 assert (sp <= fp && (fp <= caller.unextended_sp() || caller.is_interpreted_frame()), 296 "sp=" PTR_FORMAT " fp=" PTR_FORMAT " caller.unextended_sp()=" PTR_FORMAT " caller.is_interpreted_frame()=%d", 297 p2i(sp), p2i(fp), p2i(caller.unextended_sp()), caller.is_interpreted_frame()); 298 caller.set_sp(fp); 299 300 assert(_cont.tail()->is_in_chunk(sp), ""); 301 302 frame hf(sp, sp, fp, f.pc(), nullptr, nullptr, true /* on_heap */); 303 // frame_top() and frame_bottom() read these before relativize_interpreted_frame_metadata() is called 304 *hf.addr_at(ijava_idx(locals)) = locals_offset; 305 *hf.addr_at(ijava_idx(esp)) = f.interpreter_frame_esp() - f.fp(); 306 return hf; 307 } else { 308 int fsize = FKind::size(f); 309 sp = caller.unextended_sp() - fsize; 310 if (caller.is_interpreted_frame()) { 311 // If the caller is interpreted, our stackargs are not supposed to overlap with it 312 // so we make more room by moving sp down by argsize 313 int argsize = FKind::stack_argsize(f); 314 sp -= argsize + frame::metadata_words_at_top; 315 } 316 fp = sp + fsize; 317 caller.set_sp(fp); 318 319 assert(_cont.tail()->is_in_chunk(sp), ""); 320 321 return frame(sp, sp, fp, f.pc(), nullptr, nullptr, true /* on_heap */); 322 } 323 } 324 325 inline void FreezeBase::patch_pd(frame& hf, const frame& caller, bool is_bottom_frame) { 326 if (caller.is_interpreted_frame()) { 327 assert(!caller.is_empty(), ""); 328 patch_callee_link_relative(caller, caller.fp()); 329 } 330 #ifdef ASSERT 331 else { 332 // For compiled frames the back link is actually redundant. It gets computed 333 // as unextended_sp + frame_size. 334 335 // Note the difference on x86_64: the link is not made relative if the caller 336 // is a compiled frame because there rbp is used as a non-volatile register by 337 // c1/c2 so it could be a computed value local to the caller. 338 339 // See also: 340 // - FreezeBase::set_top_frame_metadata_pd 341 // - StackChunkFrameStream<frame_kind>::fp() 342 // - UseContinuationFastPath: compiled frames are copied in a batch w/o patching the back link. 343 // The backlinks are restored when thawing (see Thaw<ConfigT>::patch_caller_links()) 344 patch_callee_link(hf, (intptr_t*)badAddress); 345 } 346 #endif 347 } 348 349 inline void FreezeBase::patch_pd_unused(intptr_t* sp) { 350 } 351 352 inline intptr_t* AnchorMark::anchor_mark_set_pd() { 353 // Nothing to do on PPC because the interpreter does not use SP as expression stack pointer. 354 // Instead there is a dedicated register R15_esp which is not affected by VM calls. 355 return _top_frame.sp(); 356 } 357 358 inline void AnchorMark::anchor_mark_clear_pd() { 359 } 360 361 //////// Thaw 362 363 // Fast path 364 365 inline void ThawBase::prefetch_chunk_pd(void* start, int size) { 366 size <<= LogBytesPerWord; 367 Prefetch::read(start, size); 368 Prefetch::read(start, size - 64); 369 } 370 371 // Set back chain links of fast thawed frames such that *sp == callers_sp. 372 // See https://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.html#STACK 373 template <typename ConfigT> 374 inline void Thaw<ConfigT>::patch_caller_links(intptr_t* sp, intptr_t* bottom) { 375 for (intptr_t* callers_sp; sp < bottom; sp = callers_sp) { 376 address pc = (address)((frame::java_abi*) sp)->lr; 377 assert(pc != nullptr, ""); 378 // see ThawBase::patch_return() which gets called just before 379 bool is_entry_frame = pc == StubRoutines::cont_returnBarrier() || pc == _cont.entryPC(); 380 if (is_entry_frame) { 381 callers_sp = _cont.entryFP(); 382 } else { 383 assert(!Interpreter::contains(pc), "sp:" PTR_FORMAT " pc:" PTR_FORMAT, p2i(sp), p2i(pc)); 384 CodeBlob* cb = CodeCache::find_blob_fast(pc); 385 callers_sp = sp + cb->frame_size(); 386 } 387 // set the back link 388 ((frame::java_abi*) sp)->callers_sp = (intptr_t) callers_sp; 389 } 390 } 391 392 // Slow path 393 394 inline frame ThawBase::new_entry_frame() { 395 intptr_t* sp = _cont.entrySP(); 396 return frame(sp, _cont.entryPC(), sp, _cont.entryFP()); 397 } 398 399 // === New Interpreted Frame ================================================================================================================ 400 // 401 // ### Non-Interpreted Caller (compiled, enterSpecial): No Overlap 402 // 403 // Heap Frame `hf` `hf` gets copied to stack _without_ overlapping the caller 404 // 405 // | | Non-Interpreted | | 406 // | |<- bottom Caller |----------------------| 407 // |----------------------| ^ | frame::java_abi |<- unextended SP 408 // | L0 aka P0 | | --- ======================== 409 // | : : | | ^ | L0 aka P0 | 410 // | : Pn | | | | : : | Parameters do 411 // | : | | | | : Pn | not overlap with 412 // | Lm | | | | : | caller! 413 // |----------------------| `fsize` | | : | 414 // | frame::java_abi | | | : | 415 // ======================== | `fsize` + padding | Lm | 416 // | | | |----------------------| 417 // | ijava_state | | | | Opt. Align. Padding | 418 // | | | | |----------------------| 419 // |----------------------| | | | frame::java_abi |<- new SP of caller 420 // | L0 aka P0 | | | ======================== / FP of new frame 421 // | : : | | | | | (aligned) 422 // | : Pn |<- unext. SP + metadata | | ijava_state | 423 // | : | | | | | 424 // | Lm | | | |----------------------| 425 // |----------------------| v | | P0 | 426 // | frame::java_abi |<- SP / unextended SP | | : | 427 // ======================== | | Pi |<- unextended SP + metadata 428 // | |----------------------| 429 // | Growth | v | frame::java_abi |<- unextended SP / SP of new frame 430 // v v --- ======================== (not yet aligned(1)) 431 // 432 // 433 // ### Interpreted Caller: Overlap with Caller 434 // 435 // Caller New frame with resized/aligned Caller 436 // 437 // | | | | 438 // | ijava_state | | ijava_state | 439 // |----------------------| |----------------------| 440 // | non param. expr. | bottom | non param. expr. | 441 // | - - - - - - - - - - | --- ^ | - - - - - - - - - - | 442 // | P0 | ^ | | L0 aka P0 | 443 // | : | | | | : : | 444 // | Pn |<- unextended SP overlap | | : Pn |<- unextended SP 445 // |----------------------| + metadata_words_at_top | | | : | + metadata_words_at_top 446 // | frame::java_abi |<- unextended SP v | | : | (unaligned) 447 // ======================== / SP of new frame --- | | : | of caller 448 // (not yet aligned(1)) | | Lm | 449 // `fsize` |----------------------| 450 // overlap = stack_argsize(hf) + padding| Opt. Align. Padding | 451 // + frame::metadata_words_at_top | |----------------------| 452 // | | frame::java_abi |<- new SP of caller 453 // | ======================== / FP of new frame 454 // | | | (aligned) 455 // | Growth | | | ijava_state | 456 // v v | | | 457 // | |----------------------| 458 // | | P0 | 459 // | | : | 460 // | | Pi |<- unextended SP 461 // | |----------------------| + metadata_words_at_top 462 // v | frame::java_abi |<- unextended SP / SP of new frame 463 // --- ======================== (not yet aligned(1)) 464 // 465 // 466 // (1) The SP / unextended SP of the new interpreted frame is not aligned. It 467 // gets aligned when its callee is pushed on stack or in finish_thaw() if 468 // it is the top frame. This allows addressing parameters: unextended SP + metadata_words_at_top 469 // 470 // (2) If caller is interpreted then its ijava_state::top_frame_sp will be used as sender sp 471 // of the new frame (see ContinuationHelper::InterpretedFrame::patch_sender_sp() and diagram at the end of this file) 472 // 473 // (3) The size of alignment padding required when thawing frames is accounted for 474 // in FreezeBase::_align_size. 475 // 476 // === New Compiled Frame =================================================================================================================== 477 // 478 // Compiled Caller Interpreted Caller 479 // 480 // - stackargs+abi overlap with caller - gets resized for stackargs 481 // - no alignment padding - SP gets aligned 482 // - no overlap with orig. 483 // caller 484 // O C 485 // r a | | | | 486 // i l | | | | 487 // g l |----------------------| | | 488 // i e | Stack Args | | | 489 // n r | (if any) | |----------------------| 490 // a |----------------------| | frame::java_abi | 491 // l | frame::java_abi |<- unext. SP / SP | (unused) |<- unal.unext.SP 492 // - - - ======================== - - - - - - - - - - |----------------------|- - - - - - - - - - - - - - - - - - - - - - - - - - - - 493 // N | | | Opt. Align. Padding | 494 // e | | |----------------------| 495 // w |----------------------| | Stack Args | 496 // | frame::java_abi |<- unext. SP / SP | (if any) | 497 // F ======================== |----------------------| 498 // r | frame::java_abi |<- caller's SP 499 // a ======================== / new frame's FP 500 // m | | (aligned) 501 // e | | 502 // |----------------------| 503 // | frame::java_abi |<- unext. SP / SP 504 // ======================== 505 // 506 // If the new frame is at the bottom just above the ContinuationEntry frame then the stackargs 507 // don't overlap the caller either even though it is compiled because the size is not 508 // limited/known. In contrast to the interpreted caller case the abi overlaps with the caller 509 // if there are no stackargs. This is to comply with shared code (see e.g. StackChunkFrameStream::frame_size()) 510 // 511 template<typename FKind> frame ThawBase::new_stack_frame(const frame& hf, frame& caller, bool bottom, int size_adjust) { 512 assert(size_adjust == 0, "unsupported"); 513 assert(FKind::is_instance(hf), ""); 514 515 assert(is_aligned(caller.fp(), frame::frame_alignment), PTR_FORMAT, p2i(caller.fp())); 516 // caller.sp() can be unaligned. This is fixed below. 517 if (FKind::interpreted) { 518 // Note: we have to overlap with the caller, at least if it is interpreted, to match the 519 // max_thawing_size calculation during freeze. See also comment above. 520 intptr_t* heap_sp = hf.unextended_sp(); 521 const int fsize = ContinuationHelper::InterpretedFrame::frame_bottom(hf) - hf.unextended_sp(); 522 const int overlap = !caller.is_interpreted_frame() ? 0 523 : ContinuationHelper::InterpretedFrame::stack_argsize(hf) + frame::metadata_words_at_top; 524 intptr_t* frame_sp = caller.unextended_sp() + overlap - fsize; 525 intptr_t* fp = frame_sp + (hf.fp() - heap_sp); 526 // align fp 527 int padding = fp - align_down(fp, frame::frame_alignment); 528 fp -= padding; 529 // alignment of sp is done by callee or in finish_thaw() 530 frame_sp -= padding; 531 532 // On ppc esp points to the next free slot on the expression stack and sp + metadata points to the last parameter 533 DEBUG_ONLY(intptr_t* esp = fp + *hf.addr_at(ijava_idx(esp));) 534 assert(frame_sp + frame::metadata_words_at_top == esp+1, " frame_sp=" PTR_FORMAT " esp=" PTR_FORMAT, p2i(frame_sp), p2i(esp)); 535 caller.set_sp(fp); 536 frame f(frame_sp, hf.pc(), frame_sp, fp); 537 // we need to set the locals so that the caller of new_stack_frame() can call 538 // ContinuationHelper::InterpretedFrame::frame_bottom 539 // copy relativized locals from the heap frame 540 *f.addr_at(ijava_idx(locals)) = *hf.addr_at(ijava_idx(locals)); 541 542 return f; 543 } else { 544 int fsize = FKind::size(hf); 545 int argsize = FKind::stack_argsize(hf); 546 intptr_t* frame_sp = caller.sp() - fsize; 547 548 if ((bottom && argsize > 0) || caller.is_interpreted_frame()) { 549 assert(!_should_patch_caller_pc, ""); 550 _should_patch_caller_pc = caller.is_interpreted_frame(); 551 frame_sp -= argsize + frame::metadata_words_at_top; 552 frame_sp = align_down(frame_sp, frame::alignment_in_bytes); 553 caller.set_sp(frame_sp + fsize); 554 } 555 556 assert(hf.cb() != nullptr, ""); 557 assert(hf.oop_map() != nullptr, ""); 558 intptr_t* fp = frame_sp + fsize; 559 return frame(frame_sp, frame_sp, fp, hf.pc(), hf.cb(), hf.oop_map(), false); 560 } 561 } 562 563 inline intptr_t* ThawBase::align(const frame& hf, intptr_t* frame_sp, frame& caller, bool bottom) { 564 // Unused. Alignment is done directly in new_stack_frame() / finish_thaw(). 565 return nullptr; 566 } 567 568 inline void ThawBase::derelativize_interpreted_frame_metadata(const frame& hf, const frame& f) { 569 intptr_t* vfp = f.fp(); 570 571 // Make sure that monitors is still relativized. 572 assert(f.at_absolute(ijava_idx(monitors)) <= -(frame::ijava_state_size / wordSize), ""); 573 574 // Make sure that esp is still relativized. 575 assert(f.at_absolute(ijava_idx(esp)) <= f.at_absolute(ijava_idx(monitors)), ""); 576 577 // Keep top_frame_sp relativized. 578 } 579 580 inline intptr_t* ThawBase::push_cleanup_continuation() { 581 frame enterSpecial = new_entry_frame(); 582 frame::common_abi* enterSpecial_abi = (frame::common_abi*)enterSpecial.sp(); 583 584 enterSpecial_abi->lr = (intptr_t)ContinuationEntry::cleanup_pc(); 585 586 log_develop_trace(continuations, preempt)("push_cleanup_continuation enterSpecial sp: " INTPTR_FORMAT " cleanup pc: " INTPTR_FORMAT, 587 p2i(enterSpecial_abi), 588 p2i(ContinuationEntry::cleanup_pc())); 589 590 return enterSpecial.sp(); 591 } 592 593 inline intptr_t* ThawBase::push_preempt_adapter() { 594 frame enterSpecial = new_entry_frame(); 595 frame::common_abi* enterSpecial_abi = (frame::common_abi*)enterSpecial.sp(); 596 597 enterSpecial_abi->lr = (intptr_t)StubRoutines::cont_preempt_stub(); 598 599 log_develop_trace(continuations, preempt)("push_preempt_adapter enterSpecial sp: " INTPTR_FORMAT " adapter pc: " INTPTR_FORMAT, 600 p2i(enterSpecial_abi), 601 p2i(StubRoutines::cont_preempt_stub())); 602 603 return enterSpecial.sp(); 604 } 605 606 inline void ThawBase::patch_pd(frame& f, const frame& caller) { 607 patch_callee_link(caller, caller.fp()); 608 // Prevent assertion if f gets deoptimized right away before it's fully initialized 609 f.mark_not_fully_initialized(); 610 } 611 612 inline void ThawBase::patch_pd(frame& f, intptr_t* caller_sp) { 613 assert(f.own_abi()->callers_sp == (uint64_t)caller_sp, "should have been fixed by patch_caller_links"); 614 } 615 616 // 617 // Interpreter Calling Procedure on PPC 618 // 619 // Caller Resized Caller before the Call New Callee Frame 620 // 621 // - SP/FP are 16 byte aligned. - The unused part of the expression stack - The caller's original SP is passed as 622 // Padding is added as necessary. is removed sender SP (in R21_sender_SP) also by 623 // - SP is _not_ used as esp - Slots for the callee's nonparameter locals compiled callers. It is saved in the 624 // (expression stack pointer) are added. ijava_state::sender_sp slot and 625 // - Has reserved slots for the - The large ABI is replaced with a minimal restored when returning. 626 // maximal expression stack ABI. This removes a c2i extension if there 627 // - Has a larger ABI section on - The original SP was saved in is one. 628 // top that is required to call ijava_state::top_frame_sp slot. - ijava_state::sender_sp will be set 629 // C++ code From there it is restored as SP _after_ as the caller's unextended sp when 630 // returning from a call. This reverts the iterating stack frames 631 // resizing described above. It is also (see frame::unextended_sp() and 632 // required to undo potential i2c extensions frame::sender_for_interpreter_frame()) 633 // if the calle should be compiled. 634 // - Note that unextended SP < SP 635 // is possible on ppc. 636 // 637 // | | | | | | 638 // | (frame::java_abi) | | (frame::java_abi) | | (frame::java_abi) | 639 // | 4 words | | 4 words | | 4 words | 640 // | Caller's SP |<- FP of caller | Caller's SP |<- FP of caller | Caller's SP |<- FP of caller 641 // ======================== (aligned) ======================== ======================== 642 // | frame:: | | frame:: | | frame:: | 643 // | ijava_state | | ijava_state | | ijava_state | 644 // | | | | | | 645 // |----------------------| |----------------------| |----------------------| 646 // | P0 | | L0 aka P0 | | L0 aka P0 | 647 // | | | : | | : | 648 // | Pn | | : Pn | | : Pn | 649 // |----------------------| | : | | : | 650 // | | | Lm | | Lm | 651 // | Reserved Expr. Stack | |----------------------| |----------------------| 652 // | | | Opt. Alignm. Padding | | Opt. Alignm. Padding | 653 // | |<- ConstMethod |----------------------| |----------------------| 654 // |----------------------| ::_max_stack | | | | 655 // | Opt. Alignm. Padding | | (frame::java_abi) | | (frame::java_abi) | 656 // |----------------------| | 4 words | | 4 words | 657 // | Large ABI | | Caller's SP |<- new SP of caller | Caller's SP |<- SP of caller / 658 // | for C++ calls | ======================== (aligned) ======================== FP of callee 659 // | (frame:: | | frame:: | (aligned) 660 // | native_abi_reg_args)| | ijava_state | 661 // | | | | 662 // | | |----------------------| 663 // | | | | 664 // | Caller's SP |<- SP of caller <- unextended SP | Reserved Expr. Stack |<- unextended SP 665 // ======================== (aligned) of caller | | of caller 666 // (aligned) | | 667 // | | 668 // | | 669 // | | 670 // | |<- ConstMethod 671 // |----------------------| ::_max_stack 672 // Resize Caller Push new Callee Frame | Opt. Alignm. Padding | 673 // --------------------> ------------------------> |----------------------| 674 // (ABI, expressions, locals) | Large ABI | 675 // | for C++ calls | 676 // | (frame:: | 677 // | native_abi_reg_args)| 678 // | Growth | | | 679 // v v | | 680 // | | 681 // | Caller's SP |<- SP of callee 682 // ======================== (aligned) 683 // 684 // 685 #endif // CPU_PPC_CONTINUATION_PPC_INLINE_HPP --- EOF ---