128 // which can be different from the sender unextended sp (the sp seen
129 // by the sender) because of current frame local variables
130 sender_sp = (intptr_t*) addr_at(sender_sp_offset);
131 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset];
132 saved_fp = (intptr_t*) this->fp()[link_offset];
133
134 } else {
135 // must be some sort of compiled/runtime frame
136 // fp does not have to be safe (although it could be check for c1?)
137
138 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc
139 if (_cb->frame_size() <= 0) {
140 return false;
141 }
142
143 sender_sp = _unextended_sp + _cb->frame_size();
144 // Is sender_sp safe?
145 if (!thread->is_in_full_stack_checked((address)sender_sp)) {
146 return false;
147 }
148 sender_unextended_sp = sender_sp;
149 // On Intel the return_address is always the word on the stack
150 sender_pc = (address) *(sender_sp-1);
151 // Note: frame::sender_sp_offset is only valid for compiled frame
152 saved_fp = (intptr_t*) *(sender_sp - frame::sender_sp_offset);
153 }
154
155 if (Continuation::is_return_barrier_entry(sender_pc)) {
156 // sender_pc might be invalid so check that the frame
157 // actually belongs to a Continuation.
158 if (!Continuation::is_frame_in_continuation(thread, *this)) {
159 return false;
160 }
161 // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
162 frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
163 sender_sp = s.sp();
164 sender_pc = s.pc();
165 }
166
167 // If the potential sender is the interpreter then we can do some more checking
168 if (Interpreter::contains(sender_pc)) {
169
170 // ebp is always saved in a recognizable place in any code we generate. However
171 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp
172 // is really a frame pointer.
173
174 if (!thread->is_in_stack_range_excl((address)saved_fp, (address)sender_sp)) {
656 #ifdef AMD64
657 } else if (is_entry_frame()) {
658 // This could be more descriptive if we use the enum in
659 // stubGenerator to map to real names but it's most important to
660 // claim these frame slots so the error checking works.
661 for (int i = 0; i < entry_frame_after_call_words; i++) {
662 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i));
663 }
664 #endif // AMD64
665 }
666
667 if (is_java_frame() || Continuation::is_continuation_enterSpecial(*this)) {
668 intptr_t* ret_pc_loc;
669 intptr_t* fp_loc;
670 if (is_interpreted_frame()) {
671 ret_pc_loc = fp() + return_addr_offset;
672 fp_loc = fp();
673 } else {
674 ret_pc_loc = real_fp() - return_addr_offset;
675 fp_loc = real_fp() - sender_sp_offset;
676 }
677 address ret_pc = *(address*)ret_pc_loc;
678 values.describe(frame_no, ret_pc_loc,
679 Continuation::is_return_barrier_entry(ret_pc) ? "return address (return barrier)" : "return address");
680 values.describe(-1, fp_loc, "saved fp", 0); // "unowned" as value belongs to sender
681 }
682 }
683
684 #endif // !PRODUCT
685
686 intptr_t *frame::initial_deoptimization_info() {
687 // used to reset the saved FP
688 return fp();
689 }
690
691 #ifndef PRODUCT
692 // This is a generic constructor which is only used by pns() in debug.cpp.
693 frame::frame(void* sp, void* fp, void* pc) {
694 init((intptr_t*)sp, (intptr_t*)fp, (address)pc);
695 }
696
697 #endif
698
699 void JavaFrameAnchor::make_walkable() {
700 // last frame set?
701 if (last_Java_sp() == nullptr) return;
702 // already walkable?
703 if (walkable()) return;
704 _last_Java_pc = (address)_last_Java_sp[-1];
705 vmassert(walkable(), "something went wrong");
706 }
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128 // which can be different from the sender unextended sp (the sp seen
129 // by the sender) because of current frame local variables
130 sender_sp = (intptr_t*) addr_at(sender_sp_offset);
131 sender_unextended_sp = (intptr_t*) this->fp()[interpreter_frame_sender_sp_offset];
132 saved_fp = (intptr_t*) this->fp()[link_offset];
133
134 } else {
135 // must be some sort of compiled/runtime frame
136 // fp does not have to be safe (although it could be check for c1?)
137
138 // check for a valid frame_size, otherwise we are unlikely to get a valid sender_pc
139 if (_cb->frame_size() <= 0) {
140 return false;
141 }
142
143 sender_sp = _unextended_sp + _cb->frame_size();
144 // Is sender_sp safe?
145 if (!thread->is_in_full_stack_checked((address)sender_sp)) {
146 return false;
147 }
148 // On Intel the return_address is always the word on the stack
149 sender_pc = (address) *(sender_sp-1);
150 // Note: frame::sender_sp_offset is only valid for compiled frame
151 intptr_t** saved_fp_addr = (intptr_t**) (sender_sp - frame::sender_sp_offset);
152 saved_fp = *saved_fp_addr;
153
154 // Repair the sender sp if this is a method with scalarized inline type args
155 sender_sp = repair_sender_sp(sender_sp, saved_fp_addr);
156 sender_unextended_sp = sender_sp;
157 }
158 if (Continuation::is_return_barrier_entry(sender_pc)) {
159 // sender_pc might be invalid so check that the frame
160 // actually belongs to a Continuation.
161 if (!Continuation::is_frame_in_continuation(thread, *this)) {
162 return false;
163 }
164 // If our sender_pc is the return barrier, then our "real" sender is the continuation entry
165 frame s = Continuation::continuation_bottom_sender(thread, *this, sender_sp);
166 sender_sp = s.sp();
167 sender_pc = s.pc();
168 }
169
170 // If the potential sender is the interpreter then we can do some more checking
171 if (Interpreter::contains(sender_pc)) {
172
173 // ebp is always saved in a recognizable place in any code we generate. However
174 // only if the sender is interpreted/call_stub (c1 too?) are we certain that the saved ebp
175 // is really a frame pointer.
176
177 if (!thread->is_in_stack_range_excl((address)saved_fp, (address)sender_sp)) {
659 #ifdef AMD64
660 } else if (is_entry_frame()) {
661 // This could be more descriptive if we use the enum in
662 // stubGenerator to map to real names but it's most important to
663 // claim these frame slots so the error checking works.
664 for (int i = 0; i < entry_frame_after_call_words; i++) {
665 values.describe(frame_no, fp() - i, err_msg("call_stub word fp - %d", i));
666 }
667 #endif // AMD64
668 }
669
670 if (is_java_frame() || Continuation::is_continuation_enterSpecial(*this)) {
671 intptr_t* ret_pc_loc;
672 intptr_t* fp_loc;
673 if (is_interpreted_frame()) {
674 ret_pc_loc = fp() + return_addr_offset;
675 fp_loc = fp();
676 } else {
677 ret_pc_loc = real_fp() - return_addr_offset;
678 fp_loc = real_fp() - sender_sp_offset;
679 if (cb()->is_nmethod() && cb()->as_nmethod_or_null()->needs_stack_repair()) {
680 values.describe(frame_no, fp_loc - 1, err_msg("fsize for #%d", frame_no), 1);
681 }
682 }
683 address ret_pc = *(address*)ret_pc_loc;
684 values.describe(frame_no, ret_pc_loc,
685 Continuation::is_return_barrier_entry(ret_pc) ? "return address (return barrier)" : "return address");
686 values.describe(-1, fp_loc, "saved fp", 0); // "unowned" as value belongs to sender
687 }
688 }
689
690 #endif // !PRODUCT
691
692 intptr_t *frame::initial_deoptimization_info() {
693 // used to reset the saved FP
694 return fp();
695 }
696
697 #ifndef PRODUCT
698 // This is a generic constructor which is only used by pns() in debug.cpp.
699 frame::frame(void* sp, void* fp, void* pc) {
700 init((intptr_t*)sp, (intptr_t*)fp, (address)pc);
701 }
702
703 #endif
704
705 // Check for a method with scalarized inline type arguments that needs
706 // a stack repair and return the repaired sender stack pointer.
707 intptr_t* frame::repair_sender_sp(intptr_t* sender_sp, intptr_t** saved_fp_addr) const {
708 nmethod* nm = _cb->as_nmethod_or_null();
709 if (nm != nullptr && nm->needs_stack_repair()) {
710 // The stack increment resides just below the saved rbp on the stack
711 // and does not account for the return address.
712 intptr_t* real_frame_size_addr = (intptr_t*) (saved_fp_addr - 1);
713 int real_frame_size = ((*real_frame_size_addr) + wordSize) / wordSize;
714 assert(real_frame_size >= _cb->frame_size() && real_frame_size <= 1000000, "invalid frame size");
715 sender_sp = unextended_sp() + real_frame_size;
716 }
717 return sender_sp;
718 }
719
720 intptr_t* frame::repair_sender_sp(nmethod* nm, intptr_t* sp, intptr_t** saved_fp_addr) {
721 assert(nm != nullptr && nm->needs_stack_repair(), "");
722 // The stack increment resides just below the saved rbp on the stack
723 // and does not account for the return address.
724 intptr_t* real_frame_size_addr = (intptr_t*) (saved_fp_addr - 1);
725 int real_frame_size = ((*real_frame_size_addr) + wordSize) / wordSize;
726 assert(real_frame_size >= nm->frame_size() && real_frame_size <= 1000000, "invalid frame size");
727 return sp + real_frame_size;
728 }
729
730 bool frame::was_augmented_on_entry(int& real_size) const {
731 assert(is_compiled_frame(), "");
732 if (_cb->as_nmethod_or_null()->needs_stack_repair()) {
733 intptr_t* real_frame_size_addr = unextended_sp() + _cb->frame_size() - sender_sp_offset - 1;
734 log_trace(continuations)("real_frame_size is addr is " INTPTR_FORMAT, p2i(real_frame_size_addr));
735 real_size = ((*real_frame_size_addr) + wordSize) / wordSize;
736 return real_size != _cb->frame_size();
737 }
738 real_size = _cb->frame_size();
739 return false;
740 }
741
742 void JavaFrameAnchor::make_walkable() {
743 // last frame set?
744 if (last_Java_sp() == nullptr) return;
745 // already walkable?
746 if (walkable()) return;
747 _last_Java_pc = (address)_last_Java_sp[-1];
748 vmassert(walkable(), "something went wrong");
749 }
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