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