109 // so we make more room by moving sp down by argsize
110 int argsize = FKind::stack_argsize(f);
111 sp -= argsize;
112 }
113 caller.set_sp(sp + fsize);
114
115 assert(_cont.tail()->is_in_chunk(sp), "");
116
117 return frame(sp, sp, fp, f.pc(), nullptr, nullptr, true /* on_heap */);
118 }
119 }
120
121 void FreezeBase::adjust_interpreted_frame_unextended_sp(frame& f) {
122 assert((f.at(frame::interpreter_frame_last_sp_offset) != 0) || (f.unextended_sp() == f.sp()), "");
123 intptr_t* real_unextended_sp = (intptr_t*)f.at_relative_or_null(frame::interpreter_frame_last_sp_offset);
124 if (real_unextended_sp != nullptr) {
125 f.set_unextended_sp(real_unextended_sp); // can be null at a safepoint
126 }
127 }
128
129 inline void FreezeBase::relativize_interpreted_frame_metadata(const frame& f, const frame& hf) {
130 assert(hf.fp() == hf.unextended_sp() + (f.fp() - f.unextended_sp()), "");
131 assert((f.at(frame::interpreter_frame_last_sp_offset) != 0)
132 || (f.unextended_sp() == f.sp()), "");
133 assert(f.fp() > (intptr_t*)f.at_relative(frame::interpreter_frame_initial_sp_offset), "");
134
135 // Make sure that last_sp is already relativized.
136 assert((intptr_t*)hf.at_relative(frame::interpreter_frame_last_sp_offset) == hf.unextended_sp(), "");
137
138 // Make sure that locals is already relativized.
139 assert((*hf.addr_at(frame::interpreter_frame_locals_offset) == frame::sender_sp_offset + f.interpreter_frame_method()->max_locals() - 1), "");
140
141 // Make sure that monitor_block_top is already relativized.
142 assert(hf.at_absolute(frame::interpreter_frame_monitor_block_top_offset) <= frame::interpreter_frame_initial_sp_offset, "");
143
144 assert((hf.fp() - hf.unextended_sp()) == (f.fp() - f.unextended_sp()), "");
145 assert(hf.unextended_sp() == (intptr_t*)hf.at(frame::interpreter_frame_last_sp_offset), "");
146 assert(hf.unextended_sp() <= (intptr_t*)hf.at(frame::interpreter_frame_initial_sp_offset), "");
147 assert(hf.fp() > (intptr_t*)hf.at(frame::interpreter_frame_initial_sp_offset), "");
148 assert(hf.fp() <= (intptr_t*)hf.at(frame::interpreter_frame_locals_offset), "");
208 int overlap = caller.is_interpreted_frame() ? ContinuationHelper::InterpretedFrame::stack_argsize(hf) : 0;
209 const int fsize = (int)(ContinuationHelper::InterpretedFrame::frame_bottom(hf) - hf.unextended_sp() - overlap);
210 const int locals = hf.interpreter_frame_method()->max_locals();
211 intptr_t* frame_sp = caller.unextended_sp() - fsize;
212 intptr_t* fp = frame_sp + (hf.fp() - heap_sp);
213 DEBUG_ONLY(intptr_t* unextended_sp = fp + *hf.addr_at(frame::interpreter_frame_last_sp_offset);)
214 assert(frame_sp == unextended_sp, "");
215 caller.set_sp(fp + frame::sender_sp_offset);
216 frame f(frame_sp, frame_sp, fp, hf.pc());
217 // we need to set the locals so that the caller of new_stack_frame() can call
218 // ContinuationHelper::InterpretedFrame::frame_bottom
219 intptr_t locals_offset = *hf.addr_at(frame::interpreter_frame_locals_offset);
220 assert((int)locals_offset == frame::sender_sp_offset + locals - 1, "");
221 // copy relativized locals from the heap frame
222 *f.addr_at(frame::interpreter_frame_locals_offset) = locals_offset;
223 return f;
224 } else {
225 int fsize = FKind::size(hf);
226 intptr_t* frame_sp = caller.unextended_sp() - fsize;
227 if (bottom || caller.is_interpreted_frame()) {
228 int argsize = hf.compiled_frame_stack_argsize();
229
230 fsize += argsize;
231 frame_sp -= argsize;
232 caller.set_sp(caller.sp() - argsize);
233 assert(caller.sp() == frame_sp + (fsize-argsize), "");
234
235 frame_sp = align(hf, frame_sp, caller, bottom);
236 }
237
238 assert(hf.cb() != nullptr, "");
239 assert(hf.oop_map() != nullptr, "");
240 intptr_t* fp;
241 if (PreserveFramePointer) {
242 // we need to recreate a "real" frame pointer, pointing into the stack
243 fp = frame_sp + FKind::size(hf) - frame::sender_sp_offset;
244 } else {
245 // we need to re-read fp because it may be an oop and we might have fixed the frame.
246 fp = *(intptr_t**)(hf.sp() - frame::sender_sp_offset);
247 }
248 return frame(frame_sp, frame_sp, fp, hf.pc(), hf.cb(), hf.oop_map(), false); // TODO PERF : this computes deopt state; is it necessary?
249 }
250 }
251
252 inline intptr_t* ThawBase::align(const frame& hf, intptr_t* frame_sp, frame& caller, bool bottom) {
253 #ifdef _LP64
254 if (((intptr_t)frame_sp & 0xf) != 0) {
255 assert(caller.is_interpreted_frame() || (bottom && hf.compiled_frame_stack_argsize() % 2 != 0), "");
256 frame_sp--;
257 caller.set_sp(caller.sp() - 1);
258 }
259 assert(is_aligned(frame_sp, frame::frame_alignment), "");
260 #endif
261
262 return frame_sp;
263 }
264
265 inline void ThawBase::patch_pd(frame& f, const frame& caller) {
266 patch_callee_link(caller, caller.fp());
267 }
268
269 inline void ThawBase::derelativize_interpreted_frame_metadata(const frame& hf, const frame& f) {
270 // Make sure that last_sp is kept relativized.
271 assert((intptr_t*)f.at_relative(frame::interpreter_frame_last_sp_offset) == f.unextended_sp(), "");
272
273 // Make sure that monitor_block_top is still relativized.
274 assert(f.at_absolute(frame::interpreter_frame_monitor_block_top_offset) <= frame::interpreter_frame_initial_sp_offset, "");
275 }
276
277 #endif // CPU_X86_CONTINUATIONFREEZE_THAW_X86_INLINE_HPP
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109 // so we make more room by moving sp down by argsize
110 int argsize = FKind::stack_argsize(f);
111 sp -= argsize;
112 }
113 caller.set_sp(sp + fsize);
114
115 assert(_cont.tail()->is_in_chunk(sp), "");
116
117 return frame(sp, sp, fp, f.pc(), nullptr, nullptr, true /* on_heap */);
118 }
119 }
120
121 void FreezeBase::adjust_interpreted_frame_unextended_sp(frame& f) {
122 assert((f.at(frame::interpreter_frame_last_sp_offset) != 0) || (f.unextended_sp() == f.sp()), "");
123 intptr_t* real_unextended_sp = (intptr_t*)f.at_relative_or_null(frame::interpreter_frame_last_sp_offset);
124 if (real_unextended_sp != nullptr) {
125 f.set_unextended_sp(real_unextended_sp); // can be null at a safepoint
126 }
127 }
128
129 inline void FreezeBase::prepare_freeze_interpreted_top_frame(const frame& f) {
130 assert(*f.addr_at(frame::interpreter_frame_last_sp_offset) == 0, "should be null for top frame");
131 intptr_t* lspp = f.addr_at(frame::interpreter_frame_last_sp_offset);
132 *lspp = f.unextended_sp() - f.fp();
133 }
134
135 inline void FreezeBase::relativize_interpreted_frame_metadata(const frame& f, const frame& hf) {
136 assert(hf.fp() == hf.unextended_sp() + (f.fp() - f.unextended_sp()), "");
137 assert((f.at(frame::interpreter_frame_last_sp_offset) != 0)
138 || (f.unextended_sp() == f.sp()), "");
139 assert(f.fp() > (intptr_t*)f.at_relative(frame::interpreter_frame_initial_sp_offset), "");
140
141 // Make sure that last_sp is already relativized.
142 assert((intptr_t*)hf.at_relative(frame::interpreter_frame_last_sp_offset) == hf.unextended_sp(), "");
143
144 // Make sure that locals is already relativized.
145 assert((*hf.addr_at(frame::interpreter_frame_locals_offset) == frame::sender_sp_offset + f.interpreter_frame_method()->max_locals() - 1), "");
146
147 // Make sure that monitor_block_top is already relativized.
148 assert(hf.at_absolute(frame::interpreter_frame_monitor_block_top_offset) <= frame::interpreter_frame_initial_sp_offset, "");
149
150 assert((hf.fp() - hf.unextended_sp()) == (f.fp() - f.unextended_sp()), "");
151 assert(hf.unextended_sp() == (intptr_t*)hf.at(frame::interpreter_frame_last_sp_offset), "");
152 assert(hf.unextended_sp() <= (intptr_t*)hf.at(frame::interpreter_frame_initial_sp_offset), "");
153 assert(hf.fp() > (intptr_t*)hf.at(frame::interpreter_frame_initial_sp_offset), "");
154 assert(hf.fp() <= (intptr_t*)hf.at(frame::interpreter_frame_locals_offset), "");
214 int overlap = caller.is_interpreted_frame() ? ContinuationHelper::InterpretedFrame::stack_argsize(hf) : 0;
215 const int fsize = (int)(ContinuationHelper::InterpretedFrame::frame_bottom(hf) - hf.unextended_sp() - overlap);
216 const int locals = hf.interpreter_frame_method()->max_locals();
217 intptr_t* frame_sp = caller.unextended_sp() - fsize;
218 intptr_t* fp = frame_sp + (hf.fp() - heap_sp);
219 DEBUG_ONLY(intptr_t* unextended_sp = fp + *hf.addr_at(frame::interpreter_frame_last_sp_offset);)
220 assert(frame_sp == unextended_sp, "");
221 caller.set_sp(fp + frame::sender_sp_offset);
222 frame f(frame_sp, frame_sp, fp, hf.pc());
223 // we need to set the locals so that the caller of new_stack_frame() can call
224 // ContinuationHelper::InterpretedFrame::frame_bottom
225 intptr_t locals_offset = *hf.addr_at(frame::interpreter_frame_locals_offset);
226 assert((int)locals_offset == frame::sender_sp_offset + locals - 1, "");
227 // copy relativized locals from the heap frame
228 *f.addr_at(frame::interpreter_frame_locals_offset) = locals_offset;
229 return f;
230 } else {
231 int fsize = FKind::size(hf);
232 intptr_t* frame_sp = caller.unextended_sp() - fsize;
233 if (bottom || caller.is_interpreted_frame()) {
234 int argsize = FKind::stack_argsize(hf);
235
236 fsize += argsize;
237 frame_sp -= argsize;
238 caller.set_sp(caller.sp() - argsize);
239 assert(caller.sp() == frame_sp + (fsize-argsize), "");
240
241 frame_sp = align(hf, frame_sp, caller, bottom);
242 }
243
244 assert(hf.cb() != nullptr, "");
245 assert(hf.oop_map() != nullptr, "");
246 intptr_t* fp;
247 if (PreserveFramePointer) {
248 // we need to recreate a "real" frame pointer, pointing into the stack
249 fp = frame_sp + FKind::size(hf) - frame::sender_sp_offset;
250 } else {
251 fp = FKind::stub
252 ? frame_sp + fsize - frame::sender_sp_offset // fp always points to the address below the pushed return pc. We need correct address.
253 : *(intptr_t**)(hf.sp() - frame::sender_sp_offset); // we need to re-read fp because it may be an oop and we might have fixed the frame.
254 }
255 return frame(frame_sp, frame_sp, fp, hf.pc(), hf.cb(), hf.oop_map(), false); // TODO PERF : this computes deopt state; is it necessary?
256 }
257 }
258
259 inline intptr_t* ThawBase::align(const frame& hf, intptr_t* frame_sp, frame& caller, bool bottom) {
260 #ifdef _LP64
261 if (((intptr_t)frame_sp & 0xf) != 0) {
262 assert(caller.is_interpreted_frame() || (bottom && hf.compiled_frame_stack_argsize() % 2 != 0), "");
263 frame_sp--;
264 caller.set_sp(caller.sp() - 1);
265 }
266 assert(is_aligned(frame_sp, frame::frame_alignment), "");
267 #endif
268
269 return frame_sp;
270 }
271
272 inline void ThawBase::patch_pd(frame& f, const frame& caller) {
273 patch_callee_link(caller, caller.fp());
274 }
275
276 inline void ThawBase::patch_pd(frame& f, intptr_t* caller_sp) {
277 intptr_t* fp = caller_sp - frame::sender_sp_offset;
278 patch_callee_link(f, fp);
279 }
280
281 inline intptr_t* ThawBase::push_preempt_rerun_adapter(frame top, bool is_interpreted_frame) {
282 intptr_t* sp = top.sp();
283 intptr_t* fp = sp - frame::sender_sp_offset;
284 address pc = is_interpreted_frame ? Interpreter::cont_preempt_rerun_interpreter_adapter()
285 : StubRoutines::cont_preempt_rerun_compiler_adapter();
286
287 #ifdef ASSERT
288 RegisterMap map(JavaThread::current(),
289 RegisterMap::UpdateMap::skip,
290 RegisterMap::ProcessFrames::skip,
291 RegisterMap::WalkContinuation::skip);
292 frame caller = top.sender(&map);
293 intptr_t link_addr = (intptr_t)ContinuationHelper::Frame::callee_link_address(caller);
294 assert(sp[-2] == link_addr, "wrong link address: " INTPTR_FORMAT " != " INTPTR_FORMAT, sp[-2], link_addr);
295 #endif
296
297 sp -= frame::metadata_words;
298 *(address*)(sp - frame::sender_sp_ret_address_offset()) = pc;
299 *(intptr_t**)(sp - frame::sender_sp_offset) = fp;
300
301 log_develop_trace(continuations, preempt)("push_preempt_rerun_%s_adapter() initial sp: " INTPTR_FORMAT " final sp: " INTPTR_FORMAT " fp: " INTPTR_FORMAT,
302 is_interpreted_frame ? "interpreter" : "safepointblob", p2i(sp + frame::metadata_words), p2i(sp), p2i(fp));
303 return sp;
304 }
305
306 inline intptr_t* ThawBase::push_preempt_monitorenter_redo(stackChunkOop chunk) {
307 frame enterSpecial = new_entry_frame();
308 intptr_t* sp = enterSpecial.sp();
309
310 // First push the return barrier frame
311 sp -= frame::metadata_words;
312 sp[1] = (intptr_t)StubRoutines::cont_returnBarrier();
313 sp[0] = (intptr_t)enterSpecial.fp();
314
315 // Now push the ObjectMonitor*
316 sp -= frame::metadata_words;
317 sp[1] = (intptr_t)chunk->objectMonitor(); // alignment
318 sp[0] = (intptr_t)chunk->objectMonitor();
319
320 // Finally arrange to return to the monitorenter_redo stub
321 sp[-1] = (intptr_t)StubRoutines::cont_preempt_monitorenter_redo();
322 sp[-2] = (intptr_t)enterSpecial.fp();
323
324 log_develop_trace(continuations, preempt)("push_preempt_monitorenter_redo initial sp: " INTPTR_FORMAT " final sp: " INTPTR_FORMAT, p2i(sp + 2 * frame::metadata_words), p2i(sp));
325 return sp;
326 }
327
328 inline void ThawBase::derelativize_interpreted_frame_metadata(const frame& hf, const frame& f) {
329 // Make sure that last_sp is kept relativized.
330 assert((intptr_t*)f.at_relative(frame::interpreter_frame_last_sp_offset) == f.unextended_sp(), "");
331
332 // Make sure that monitor_block_top is still relativized.
333 assert(f.at_absolute(frame::interpreter_frame_monitor_block_top_offset) <= frame::interpreter_frame_initial_sp_offset, "");
334 }
335
336 #endif // CPU_X86_CONTINUATIONFREEZE_THAW_X86_INLINE_HPP
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