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 *
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
21 * questions.
22 *
23 */
24
25 #include "code/codeCache.hpp"
26 #include "code/compiledIC.hpp"
27 #include "code/nmethod.hpp"
28 #include "code/relocInfo.hpp"
29 #include "memory/resourceArea.hpp"
30 #include "memory/universe.hpp"
31 #include "oops/compressedOops.inline.hpp"
32 #include "oops/oop.inline.hpp"
33 #include "runtime/flags/flagSetting.hpp"
34 #include "runtime/stubCodeGenerator.hpp"
35 #include "utilities/align.hpp"
36 #include "utilities/checkedCast.hpp"
37 #include "utilities/copy.hpp"
38
39 #include <new>
40 #include <type_traits>
41
42 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none
43
44
45 // Implementation of relocInfo
46
47 #ifdef ASSERT
48 relocInfo::relocType relocInfo::check_relocType(relocType type) {
155 _addr = cs->start();
156 _code = nullptr; // Not cb->blob();
157
158 CodeBuffer* cb = cs->outer();
159 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal");
160 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) {
161 CodeSection* cs = cb->code_section(n);
162 _section_start[n] = cs->start();
163 _section_end [n] = cs->end();
164 }
165
166 assert(!has_current(), "just checking");
167
168 assert(begin == nullptr || begin >= cs->start(), "in bounds");
169 assert(limit == nullptr || limit <= cs->end(), "in bounds");
170 set_limits(begin, limit);
171 }
172
173 bool RelocIterator::addr_in_const() const {
174 const int n = CodeBuffer::SECT_CONSTS;
175 return section_start(n) <= addr() && addr() < section_end(n);
176 }
177
178
179 void RelocIterator::set_limits(address begin, address limit) {
180 _limit = limit;
181
182 // the limit affects this next stuff:
183 if (begin != nullptr) {
184 relocInfo* backup;
185 address backup_addr;
186 while (true) {
187 backup = _current;
188 backup_addr = _addr;
189 if (!next() || addr() >= begin) break;
190 }
191 // At this point, either we are at the first matching record,
192 // or else there is no such record, and !has_current().
193 // In either case, revert to the immediately preceding state.
194 _current = backup;
445 jint offset = unpack_1_int();
446 _static_call = address_from_scaled_offset(offset, base);
447 }
448
449 void trampoline_stub_Relocation::pack_data_to(CodeSection* dest ) {
450 short* p = (short*) dest->locs_end();
451 CodeSection* insts = dest->outer()->insts();
452 normalize_address(_owner, insts);
453 p = pack_1_int_to(p, scaled_offset(_owner, insts->start()));
454 dest->set_locs_end((relocInfo*) p);
455 }
456
457 void trampoline_stub_Relocation::unpack_data() {
458 address base = binding()->section_start(CodeBuffer::SECT_INSTS);
459 _owner = address_from_scaled_offset(unpack_1_int(), base);
460 }
461
462 void external_word_Relocation::pack_data_to(CodeSection* dest) {
463 short* p = (short*) dest->locs_end();
464 int index = ExternalsRecorder::find_index(_target);
465 p = pack_1_int_to(p, index);
466 dest->set_locs_end((relocInfo*) p);
467 }
468
469
470 void external_word_Relocation::unpack_data() {
471 int index = unpack_1_int();
472 _target = ExternalsRecorder::at(index);
473 }
474
475
476 void internal_word_Relocation::pack_data_to(CodeSection* dest) {
477 short* p = (short*) dest->locs_end();
478 normalize_address(_target, dest, true);
479
480 // Check whether my target address is valid within this section.
481 // If not, strengthen the relocation type to point to another section.
482 int sindex = _section;
483 if (sindex == CodeBuffer::SECT_NONE && _target != nullptr
484 && (!dest->allocates(_target) || _target == dest->locs_point())) {
485 sindex = dest->outer()->section_index_of(_target);
486 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere");
487 relocInfo* base = dest->locs_end() - 1;
488 assert(base->type() == this->type(), "sanity");
489 // Change the written type, to be section_word_type instead.
718
719 return nullptr;
720 }
721
722 void static_stub_Relocation::clear_inline_cache() {
723 // Call stub is only used when calling the interpreted code.
724 // It does not really need to be cleared, except that we want to clean out the methodoop.
725 CompiledDirectCall::set_stub_to_clean(this);
726 }
727
728
729 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
730 if (_target != nullptr) {
731 // Probably this reference is absolute, not relative, so the following is
732 // probably a no-op.
733 set_value(_target);
734 }
735 // If target is nullptr, this is an absolute embedded reference to an external
736 // location, which means there is nothing to fix here. In either case, the
737 // resulting target should be an "external" address.
738 postcond(src->section_index_of(target()) == CodeBuffer::SECT_NONE);
739 postcond(dest->section_index_of(target()) == CodeBuffer::SECT_NONE);
740 }
741
742
743 address external_word_Relocation::target() {
744 address target = _target;
745 if (target == nullptr) {
746 target = pd_get_address_from_code();
747 }
748 return target;
749 }
750
751
752 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
753 address target = _target;
754 if (target == nullptr) {
755 target = new_addr_for(this->target(), src, dest);
756 }
757 set_value(target);
758 }
759
760
761 address internal_word_Relocation::target() {
762 address target = _target;
763 if (target == nullptr) {
764 if (addr_in_const()) {
765 target = *(address*)addr();
766 } else {
767 target = pd_get_address_from_code();
768 }
769 }
770 return target;
771 }
772
773 //---------------------------------------------------------------------------------
774 // Non-product code
775
776 #ifndef PRODUCT
777
778 static const char* reloc_type_string(relocInfo::relocType t) {
779 switch (t) {
780 #define EACH_CASE(name) \
781 case relocInfo::name##_type: \
782 return #name;
783
784 APPLY_TO_RELOCATIONS(EACH_CASE);
785 #undef EACH_CASE
786
787 case relocInfo::none:
788 return "none";
789 case relocInfo::data_prefix_tag:
790 return "prefix";
791 default:
792 return "UNKNOWN RELOC TYPE";
793 }
794 }
795
796
797 void RelocIterator::print_current() {
798 if (!has_current()) {
799 tty->print_cr("(no relocs)");
800 return;
801 }
802 tty->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d",
803 p2i(_current), type(), reloc_type_string((relocInfo::relocType) type()), p2i(_addr), _current->addr_offset());
804 if (current()->format() != 0)
805 tty->print(" format=%d", current()->format());
806 if (datalen() == 1) {
807 tty->print(" data=%d", data()[0]);
808 } else if (datalen() > 0) {
809 tty->print(" data={");
810 for (int i = 0; i < datalen(); i++) {
811 tty->print("%04x", data()[i] & 0xFFFF);
812 }
813 tty->print("}");
814 }
815 tty->print("]");
816 switch (type()) {
817 case relocInfo::oop_type:
818 {
819 oop_Relocation* r = oop_reloc();
820 oop* oop_addr = nullptr;
821 oop raw_oop = nullptr;
822 oop oop_value = nullptr;
823 if (code() != nullptr || r->oop_is_immediate()) {
824 oop_addr = r->oop_addr();
825 raw_oop = *oop_addr;
826 oop_value = r->oop_value();
827 }
828 tty->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT "]",
829 p2i(oop_addr), p2i(raw_oop));
830 // Do not print the oop by default--we want this routine to
831 // work even during GC or other inconvenient times.
832 if (WizardMode && oop_value != nullptr) {
833 tty->print("oop_value=" INTPTR_FORMAT ": ", p2i(oop_value));
834 if (oopDesc::is_oop(oop_value)) {
835 oop_value->print_value_on(tty);
836 }
837 }
838 break;
839 }
840 case relocInfo::metadata_type:
841 {
842 metadata_Relocation* r = metadata_reloc();
843 Metadata** metadata_addr = nullptr;
844 Metadata* raw_metadata = nullptr;
845 Metadata* metadata_value = nullptr;
846 if (code() != nullptr || r->metadata_is_immediate()) {
847 metadata_addr = r->metadata_addr();
848 raw_metadata = *metadata_addr;
849 metadata_value = r->metadata_value();
850 }
851 tty->print(" | [metadata_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT "]",
852 p2i(metadata_addr), p2i(raw_metadata));
853 if (metadata_value != nullptr) {
854 tty->print("metadata_value=" INTPTR_FORMAT ": ", p2i(metadata_value));
855 metadata_value->print_value_on(tty);
856 }
857 break;
858 }
859 case relocInfo::external_word_type:
860 case relocInfo::internal_word_type:
861 case relocInfo::section_word_type:
862 {
863 DataRelocation* r = (DataRelocation*) reloc();
864 tty->print(" | [target=" INTPTR_FORMAT "]", p2i(r->value())); //value==target
865 break;
866 }
867 case relocInfo::static_call_type:
868 {
869 static_call_Relocation* r = (static_call_Relocation*) reloc();
870 tty->print(" | [destination=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
871 p2i(r->destination()), p2i(r->method_value()));
872 break;
873 }
874 case relocInfo::runtime_call_type:
875 case relocInfo::runtime_call_w_cp_type:
876 {
877 CallRelocation* r = (CallRelocation*) reloc();
878 tty->print(" | [destination=" INTPTR_FORMAT "]", p2i(r->destination()));
879 break;
880 }
881 case relocInfo::virtual_call_type:
882 {
883 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc();
884 tty->print(" | [destination=" INTPTR_FORMAT " cached_value=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
885 p2i(r->destination()), p2i(r->cached_value()), p2i(r->method_value()));
886 break;
887 }
888 case relocInfo::static_stub_type:
889 {
890 static_stub_Relocation* r = (static_stub_Relocation*) reloc();
891 tty->print(" | [static_call=" INTPTR_FORMAT "]", p2i(r->static_call()));
892 break;
893 }
894 case relocInfo::trampoline_stub_type:
895 {
896 trampoline_stub_Relocation* r = (trampoline_stub_Relocation*) reloc();
897 tty->print(" | [trampoline owner=" INTPTR_FORMAT "]", p2i(r->owner()));
898 break;
899 }
900 case relocInfo::opt_virtual_call_type:
901 {
902 opt_virtual_call_Relocation* r = (opt_virtual_call_Relocation*) reloc();
903 tty->print(" | [destination=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
904 p2i(r->destination()), p2i(r->method_value()));
905 break;
906 }
907 default:
908 break;
909 }
910 tty->cr();
911 }
912
913
914 void RelocIterator::print() {
915 RelocIterator save_this = (*this);
916 relocInfo* scan = _current;
917 if (!has_current()) scan += 1; // nothing to scan here!
918
919 bool skip_next = has_current();
920 bool got_next;
921 while (true) {
922 got_next = (skip_next || next());
923 skip_next = false;
924
925 tty->print(" @" INTPTR_FORMAT ": ", p2i(scan));
926 relocInfo* newscan = _current+1;
927 if (!has_current()) newscan -= 1; // nothing to scan here!
928 while (scan < newscan) {
929 tty->print("%04x", *(short*)scan & 0xFFFF);
930 scan++;
931 }
932 tty->cr();
933
934 if (!got_next) break;
935 print_current();
936 }
937
938 (*this) = save_this;
939 }
940
941 // For the debugger:
942 extern "C"
943 void print_blob_locs(nmethod* nm) {
944 nm->print();
945 RelocIterator iter(nm);
946 iter.print();
947 }
948 extern "C"
949 void print_buf_locs(CodeBuffer* cb) {
950 FlagSetting fs(PrintRelocations, true);
951 cb->print();
952 }
953 #endif // !PRODUCT
|
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 *
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
21 * questions.
22 *
23 */
24
25 #include "ci/ciUtilities.hpp"
26 #include "code/codeCache.hpp"
27 #include "code/compiledIC.hpp"
28 #include "code/nmethod.hpp"
29 #include "code/relocInfo.hpp"
30 #include "code/SCCache.hpp"
31 #include "memory/resourceArea.hpp"
32 #include "memory/universe.hpp"
33 #include "oops/compressedOops.inline.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "runtime/flags/flagSetting.hpp"
36 #include "runtime/stubCodeGenerator.hpp"
37 #include "utilities/align.hpp"
38 #include "utilities/checkedCast.hpp"
39 #include "utilities/copy.hpp"
40
41 #include <new>
42 #include <type_traits>
43
44 const RelocationHolder RelocationHolder::none; // its type is relocInfo::none
45
46
47 // Implementation of relocInfo
48
49 #ifdef ASSERT
50 relocInfo::relocType relocInfo::check_relocType(relocType type) {
157 _addr = cs->start();
158 _code = nullptr; // Not cb->blob();
159
160 CodeBuffer* cb = cs->outer();
161 assert((int) SECT_LIMIT == CodeBuffer::SECT_LIMIT, "my copy must be equal");
162 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) {
163 CodeSection* cs = cb->code_section(n);
164 _section_start[n] = cs->start();
165 _section_end [n] = cs->end();
166 }
167
168 assert(!has_current(), "just checking");
169
170 assert(begin == nullptr || begin >= cs->start(), "in bounds");
171 assert(limit == nullptr || limit <= cs->end(), "in bounds");
172 set_limits(begin, limit);
173 }
174
175 bool RelocIterator::addr_in_const() const {
176 const int n = CodeBuffer::SECT_CONSTS;
177 if (_section_start[n] == nullptr) {
178 return false;
179 }
180 return section_start(n) <= addr() && addr() < section_end(n);
181 }
182
183
184 void RelocIterator::set_limits(address begin, address limit) {
185 _limit = limit;
186
187 // the limit affects this next stuff:
188 if (begin != nullptr) {
189 relocInfo* backup;
190 address backup_addr;
191 while (true) {
192 backup = _current;
193 backup_addr = _addr;
194 if (!next() || addr() >= begin) break;
195 }
196 // At this point, either we are at the first matching record,
197 // or else there is no such record, and !has_current().
198 // In either case, revert to the immediately preceding state.
199 _current = backup;
450 jint offset = unpack_1_int();
451 _static_call = address_from_scaled_offset(offset, base);
452 }
453
454 void trampoline_stub_Relocation::pack_data_to(CodeSection* dest ) {
455 short* p = (short*) dest->locs_end();
456 CodeSection* insts = dest->outer()->insts();
457 normalize_address(_owner, insts);
458 p = pack_1_int_to(p, scaled_offset(_owner, insts->start()));
459 dest->set_locs_end((relocInfo*) p);
460 }
461
462 void trampoline_stub_Relocation::unpack_data() {
463 address base = binding()->section_start(CodeBuffer::SECT_INSTS);
464 _owner = address_from_scaled_offset(unpack_1_int(), base);
465 }
466
467 void external_word_Relocation::pack_data_to(CodeSection* dest) {
468 short* p = (short*) dest->locs_end();
469 int index = ExternalsRecorder::find_index(_target);
470 // Use 4 bytes to store index to be able patch it when
471 // updating relocations in SCCReader::read_relocations().
472 p = add_jint(p, index);
473 dest->set_locs_end((relocInfo*) p);
474 }
475
476 void external_word_Relocation::unpack_data() {
477 int index = unpack_1_int();
478 _target = ExternalsRecorder::at(index);
479 }
480
481
482 void internal_word_Relocation::pack_data_to(CodeSection* dest) {
483 short* p = (short*) dest->locs_end();
484 normalize_address(_target, dest, true);
485
486 // Check whether my target address is valid within this section.
487 // If not, strengthen the relocation type to point to another section.
488 int sindex = _section;
489 if (sindex == CodeBuffer::SECT_NONE && _target != nullptr
490 && (!dest->allocates(_target) || _target == dest->locs_point())) {
491 sindex = dest->outer()->section_index_of(_target);
492 guarantee(sindex != CodeBuffer::SECT_NONE, "must belong somewhere");
493 relocInfo* base = dest->locs_end() - 1;
494 assert(base->type() == this->type(), "sanity");
495 // Change the written type, to be section_word_type instead.
724
725 return nullptr;
726 }
727
728 void static_stub_Relocation::clear_inline_cache() {
729 // Call stub is only used when calling the interpreted code.
730 // It does not really need to be cleared, except that we want to clean out the methodoop.
731 CompiledDirectCall::set_stub_to_clean(this);
732 }
733
734
735 void external_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
736 if (_target != nullptr) {
737 // Probably this reference is absolute, not relative, so the following is
738 // probably a no-op.
739 set_value(_target);
740 }
741 // If target is nullptr, this is an absolute embedded reference to an external
742 // location, which means there is nothing to fix here. In either case, the
743 // resulting target should be an "external" address.
744 #ifdef ASSERT
745 if (SCCache::is_on()) {
746 // SCA needs relocation info for card table base which may point to CodeCache
747 if (is_card_table_address(target())) {
748 return;
749 }
750 }
751 #endif
752 postcond(src->section_index_of(target()) == CodeBuffer::SECT_NONE);
753 postcond(dest->section_index_of(target()) == CodeBuffer::SECT_NONE);
754 }
755
756
757 address external_word_Relocation::target() {
758 address target = _target;
759 if (target == nullptr) {
760 target = pd_get_address_from_code();
761 }
762 return target;
763 }
764
765
766 void internal_word_Relocation::fix_relocation_after_move(const CodeBuffer* src, CodeBuffer* dest) {
767 address target = _target;
768 if (target == nullptr) {
769 target = new_addr_for(this->target(), src, dest);
770 }
771 set_value(target);
772 }
773
774
775 address internal_word_Relocation::target() {
776 address target = _target;
777 if (target == nullptr) {
778 if (addr_in_const()) {
779 target = *(address*)addr();
780 } else {
781 target = pd_get_address_from_code();
782 }
783 }
784 return target;
785 }
786
787 const char* relocInfo::type_name(relocInfo::relocType t) {
788 switch (t) {
789 #define EACH_CASE(name) \
790 case relocInfo::name##_type: \
791 return #name;
792
793 APPLY_TO_RELOCATIONS(EACH_CASE);
794 #undef EACH_CASE
795
796 case relocInfo::none:
797 return "none";
798 case relocInfo::data_prefix_tag:
799 return "prefix";
800 default:
801 return "UNKNOWN RELOC TYPE";
802 }
803 }
804
805
806 void RelocIterator::print_current_on(outputStream* st) {
807 if (!has_current()) {
808 st->print_cr("(no relocs)");
809 return;
810 }
811 st->print("relocInfo@" INTPTR_FORMAT " [type=%d(%s) addr=" INTPTR_FORMAT " offset=%d",
812 p2i(_current), type(), relocInfo::type_name(type()), p2i(_addr), _current->addr_offset());
813 if (current()->format() != 0)
814 st->print(" format=%d", current()->format());
815 if (datalen() == 1) {
816 st->print(" data=%d", data()[0]);
817 } else if (datalen() > 0) {
818 st->print(" data={");
819 for (int i = 0; i < datalen(); i++) {
820 st->print("%04x", data()[i] & 0xFFFF);
821 }
822 st->print("}");
823 }
824 st->print("]");
825 switch (type()) {
826 case relocInfo::oop_type:
827 {
828 oop_Relocation* r = oop_reloc();
829 oop* oop_addr = nullptr;
830 oop raw_oop = nullptr;
831 oop oop_value = nullptr;
832 if (code() != nullptr || r->oop_is_immediate()) {
833 oop_addr = r->oop_addr();
834 raw_oop = *oop_addr;
835 oop_value = r->oop_value();
836 }
837 st->print(" | [oop_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " index=%d]",
838 p2i(oop_addr), p2i(raw_oop), r->oop_index());
839 // Do not print the oop by default--we want this routine to
840 // work even during GC or other inconvenient times.
841 if (WizardMode && oop_value != nullptr) {
842 st->print("oop_value=" INTPTR_FORMAT ": ", p2i(oop_value));
843 if (oopDesc::is_oop(oop_value)) {
844 oop_value->print_value_on(st);
845 }
846 }
847 break;
848 }
849 case relocInfo::metadata_type:
850 {
851 metadata_Relocation* r = metadata_reloc();
852 Metadata** metadata_addr = nullptr;
853 Metadata* raw_metadata = nullptr;
854 Metadata* metadata_value = nullptr;
855 if (code() != nullptr || r->metadata_is_immediate()) {
856 metadata_addr = r->metadata_addr();
857 raw_metadata = *metadata_addr;
858 metadata_value = r->metadata_value();
859 }
860 st->print(" | [metadata_addr=" INTPTR_FORMAT " *=" INTPTR_FORMAT " index=%d]",
861 p2i(metadata_addr), p2i(raw_metadata), r->metadata_index());
862 if (metadata_value != nullptr) {
863 st->print("metadata_value=" INTPTR_FORMAT ": ", p2i(metadata_value));
864 metadata_value->print_value_on(st);
865 }
866 break;
867 }
868 case relocInfo::external_word_type:
869 case relocInfo::internal_word_type:
870 case relocInfo::section_word_type:
871 {
872 DataRelocation* r = (DataRelocation*) reloc();
873 st->print(" | [target=" INTPTR_FORMAT "]", p2i(r->value())); //value==target
874 break;
875 }
876 case relocInfo::static_call_type:
877 {
878 static_call_Relocation* r = (static_call_Relocation*) reloc();
879 st->print(" | [destination=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
880 p2i(r->destination()), p2i(r->method_value()));
881 CodeBlob* cb = CodeCache::find_blob(r->destination());
882 if (cb != nullptr) {
883 st->print(" Blob::%s", cb->name());
884 }
885 break;
886 }
887 case relocInfo::runtime_call_type:
888 case relocInfo::runtime_call_w_cp_type:
889 {
890 CallRelocation* r = (CallRelocation*) reloc();
891 address dest = r->destination();
892 st->print(" | [destination=" INTPTR_FORMAT "]", p2i(dest));
893 if (StubRoutines::contains(dest)) {
894 StubCodeDesc* desc = StubCodeDesc::desc_for(dest);
895 if (desc == nullptr) {
896 desc = StubCodeDesc::desc_for(dest + frame::pc_return_offset);
897 }
898 if (desc != nullptr) {
899 st->print(" Stub::%s", desc->name());
900 }
901 } else {
902 CodeBlob* cb = CodeCache::find_blob(dest);
903 if (cb != nullptr) {
904 st->print(" Blob::%s", cb->name());
905 } else {
906 ResourceMark rm;
907 const int buflen = 1024;
908 char* buf = NEW_RESOURCE_ARRAY(char, buflen);
909 int offset;
910 if (os::dll_address_to_function_name(dest, buf, buflen, &offset)) {
911 st->print(" %s", buf);
912 if (offset != 0) {
913 st->print("+%d", offset);
914 }
915 }
916 }
917 }
918 break;
919 }
920 case relocInfo::virtual_call_type:
921 {
922 virtual_call_Relocation* r = (virtual_call_Relocation*) reloc();
923 st->print(" | [destination=" INTPTR_FORMAT " cached_value=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
924 p2i(r->destination()), p2i(r->cached_value()), p2i(r->method_value()));
925 CodeBlob* cb = CodeCache::find_blob(r->destination());
926 if (cb != nullptr) {
927 st->print(" Blob::%s", cb->name());
928 }
929 break;
930 }
931 case relocInfo::static_stub_type:
932 {
933 static_stub_Relocation* r = (static_stub_Relocation*) reloc();
934 st->print(" | [static_call=" INTPTR_FORMAT "]", p2i(r->static_call()));
935 break;
936 }
937 case relocInfo::trampoline_stub_type:
938 {
939 trampoline_stub_Relocation* r = (trampoline_stub_Relocation*) reloc();
940 st->print(" | [trampoline owner=" INTPTR_FORMAT "]", p2i(r->owner()));
941 break;
942 }
943 case relocInfo::opt_virtual_call_type:
944 {
945 opt_virtual_call_Relocation* r = (opt_virtual_call_Relocation*) reloc();
946 st->print(" | [destination=" INTPTR_FORMAT " metadata=" INTPTR_FORMAT "]",
947 p2i(r->destination()), p2i(r->method_value()));
948 CodeBlob* cb = CodeCache::find_blob(r->destination());
949 if (cb != nullptr) {
950 st->print(" Blob::%s", cb->name());
951 }
952 break;
953 }
954 default:
955 break;
956 }
957 st->cr();
958 }
959
960
961 void RelocIterator::print_on(outputStream* st) {
962 RelocIterator save_this = (*this);
963 relocInfo* scan = _current;
964 if (!has_current()) scan += 1; // nothing to scan here!
965
966 bool skip_next = has_current();
967 bool got_next;
968 while (true) {
969 got_next = (skip_next || next());
970 skip_next = false;
971
972 st->print(" @" INTPTR_FORMAT ": ", p2i(scan));
973 relocInfo* newscan = _current+1;
974 if (!has_current()) newscan -= 1; // nothing to scan here!
975 while (scan < newscan) {
976 st->print("%04x", *(short*)scan & 0xFFFF);
977 scan++;
978 }
979 st->cr();
980
981 if (!got_next) break;
982 print_current_on(st);
983 }
984
985 (*this) = save_this;
986 }
987
988 //---------------------------------------------------------------------------------
989 // Non-product code
990
991 #ifndef PRODUCT
992
993 // For the debugger:
994 extern "C"
995 void print_blob_locs(nmethod* nm) {
996 nm->print();
997 RelocIterator iter(nm);
998 iter.print_on(tty);
999 }
1000 extern "C"
1001 void print_buf_locs(CodeBuffer* cb) {
1002 FlagSetting fs(PrintRelocations, true);
1003 cb->print_on(tty);
1004 }
1005 #endif // !PRODUCT
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