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 "precompiled.hpp"
26 #include "asm/codeBuffer.hpp"
27 #include "code/compiledIC.hpp"
28 #include "code/oopRecorder.inline.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "logging/log.hpp"
31 #include "oops/klass.inline.hpp"
32 #include "oops/methodData.hpp"
33 #include "oops/oop.inline.hpp"
34 #include "runtime/icache.hpp"
35 #include "runtime/safepointVerifiers.hpp"
36 #include "utilities/align.hpp"
37 #include "utilities/copy.hpp"
38 #include "utilities/powerOfTwo.hpp"
39 #include "utilities/xmlstream.hpp"
40
41 // The structure of a CodeSection:
42 //
43 // _start -> +----------------+
44 // | machine code...|
45 // _end -> |----------------|
46 // | |
47 // | (empty) |
48 // | |
49 // | |
50 // +----------------+
51 // _limit -> | |
519 void CodeBuffer::finalize_oop_references(const methodHandle& mh) {
520 NoSafepointVerifier nsv;
521
522 GrowableArray<oop> oops;
523
524 // Make sure that immediate metadata records something in the OopRecorder
525 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) {
526 // pull code out of each section
527 CodeSection* cs = code_section(n);
528 if (cs->is_empty() || !cs->has_locs()) continue; // skip trivial section
529 RelocIterator iter(cs);
530 while (iter.next()) {
531 if (iter.type() == relocInfo::metadata_type) {
532 metadata_Relocation* md = iter.metadata_reloc();
533 if (md->metadata_is_immediate()) {
534 Metadata* m = md->metadata_value();
535 if (oop_recorder()->is_real(m)) {
536 if (m->is_methodData()) {
537 m = ((MethodData*)m)->method();
538 }
539 if (m->is_method()) {
540 m = ((Method*)m)->method_holder();
541 }
542 if (m->is_klass()) {
543 append_oop_references(&oops, (Klass*)m);
544 } else {
545 // XXX This will currently occur for MDO which don't
546 // have a backpointer. This has to be fixed later.
547 m->print();
548 ShouldNotReachHere();
549 }
550 }
551 }
552 }
553 }
554 }
555
556 if (!oop_recorder()->is_unused()) {
557 for (int i = 0; i < oop_recorder()->metadata_count(); i++) {
558 Metadata* m = oop_recorder()->metadata_at(i);
559 if (oop_recorder()->is_real(m)) {
560 if (m->is_methodData()) {
561 m = ((MethodData*)m)->method();
562 }
563 if (m->is_method()) {
564 m = ((Method*)m)->method_holder();
565 }
566 if (m->is_klass()) {
567 append_oop_references(&oops, (Klass*)m);
568 } else {
569 m->print();
570 ShouldNotReachHere();
571 }
572 }
573 }
574
575 }
576
577 // Add the class loader of Method* for the nmethod itself
578 append_oop_references(&oops, mh->method_holder());
579
580 // Add any oops that we've found
581 Thread* thread = Thread::current();
582 for (int i = 0; i < oops.length(); i++) {
705 csize_t CodeBuffer::copy_relocations_to(CodeBlob* dest) const {
706 address buf = nullptr;
707 csize_t buf_offset = 0;
708 csize_t buf_limit = 0;
709
710 if (dest != nullptr) {
711 buf = (address)dest->relocation_begin();
712 buf_limit = (address)dest->relocation_end() - buf;
713 }
714 // if dest is null, this is just the sizing pass
715 //
716 buf_offset = copy_relocations_to(buf, buf_limit, false);
717
718 return buf_offset;
719 }
720
721 void CodeBuffer::copy_code_to(CodeBlob* dest_blob) {
722 #ifndef PRODUCT
723 if (PrintNMethods && (WizardMode || Verbose)) {
724 tty->print("done with CodeBuffer:");
725 ((CodeBuffer*)this)->print();
726 }
727 #endif //PRODUCT
728
729 CodeBuffer dest(dest_blob);
730 assert(dest_blob->content_size() >= total_content_size(), "good sizing");
731 this->compute_final_layout(&dest);
732
733 // Set beginning of constant table before relocating.
734 dest_blob->set_ctable_begin(dest.consts()->start());
735
736 relocate_code_to(&dest);
737
738 // Share assembly remarks and debug strings with the blob.
739 NOT_PRODUCT(dest_blob->use_remarks(_asm_remarks));
740 NOT_PRODUCT(dest_blob->use_strings(_dbg_strings));
741
742 // Done moving code bytes; were they the right size?
743 assert((int)align_up(dest.total_content_size(), oopSize) == dest_blob->content_size(), "sanity");
744
745 // Flush generated code
846 exp = 0;
847 }
848 // Allow for inter-section slop:
849 exp += CodeSection::end_slop();
850 csize_t new_cap = sect->size() + exp;
851 if (new_cap < sect->capacity()) {
852 // No need to expand after all.
853 new_cap = sect->capacity();
854 }
855 new_capacity[n] = new_cap;
856 new_total_cap += new_cap;
857 }
858
859 return new_total_cap;
860 }
861
862 void CodeBuffer::expand(CodeSection* which_cs, csize_t amount) {
863 #ifndef PRODUCT
864 if (PrintNMethods && (WizardMode || Verbose)) {
865 tty->print("expanding CodeBuffer:");
866 this->print();
867 }
868
869 if (StressCodeBuffers && blob() != nullptr) {
870 static int expand_count = 0;
871 if (expand_count >= 0) expand_count += 1;
872 if (expand_count > 100 && is_power_of_2(expand_count)) {
873 tty->print_cr("StressCodeBuffers: have expanded %d times", expand_count);
874 // simulate an occasional allocation failure:
875 free_blob();
876 }
877 }
878 #endif //PRODUCT
879
880 // Resizing must be allowed
881 {
882 if (blob() == nullptr) return; // caller must check if blob is null
883 }
884
885 // Figure new capacity for each section.
886 csize_t new_capacity[SECT_LIMIT];
929
930 // Move all the code and relocations to the new blob:
931 relocate_code_to(&cb);
932
933 // Copy the temporary code buffer into the current code buffer.
934 // Basically, do {*this = cb}, except for some control information.
935 this->take_over_code_from(&cb);
936 cb.set_blob(nullptr);
937
938 // Zap the old code buffer contents, to avoid mistakenly using them.
939 debug_only(Copy::fill_to_bytes(bxp->_total_start, bxp->_total_size,
940 badCodeHeapFreeVal);)
941
942 // Make certain that the new sections are all snugly inside the new blob.
943 debug_only(verify_section_allocation();)
944
945 #ifndef PRODUCT
946 _decode_begin = nullptr; // sanity
947 if (PrintNMethods && (WizardMode || Verbose)) {
948 tty->print("expanded CodeBuffer:");
949 this->print();
950 }
951 #endif //PRODUCT
952 }
953
954 void CodeBuffer::take_over_code_from(CodeBuffer* cb) {
955 // Must already have disposed of the old blob somehow.
956 assert(blob() == nullptr, "must be empty");
957 // Take the new blob away from cb.
958 set_blob(cb->blob());
959 // Take over all the section pointers.
960 for (int n = 0; n < (int)SECT_LIMIT; n++) {
961 CodeSection* cb_sect = cb->code_section(n);
962 CodeSection* this_sect = code_section(n);
963 this_sect->take_over_code_from(cb_sect);
964 }
965 _overflow_arena = cb->_overflow_arena;
966 cb->_overflow_arena = nullptr;
967 // Make sure the old cb won't try to use it or free it.
968 DEBUG_ONLY(cb->_blob = (BufferBlob*)badAddress);
969 }
974 address tend = tstart + _total_size;
975 if (_blob != nullptr) {
976 guarantee(tstart >= _blob->content_begin(), "sanity");
977 guarantee(tend <= _blob->content_end(), "sanity");
978 }
979 // Verify disjointness.
980 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) {
981 CodeSection* sect = code_section(n);
982 if (!sect->is_allocated() || sect->is_empty()) {
983 continue;
984 }
985 guarantee(_blob == nullptr || is_aligned(sect->start(), sect->alignment()),
986 "start is aligned");
987 for (int m = n + 1; m < (int) SECT_LIMIT; m++) {
988 CodeSection* other = code_section(m);
989 if (!other->is_allocated() || other == sect) {
990 continue;
991 }
992 guarantee(other->disjoint(sect), "sanity");
993 }
994 guarantee(sect->end() <= tend, "sanity");
995 guarantee(sect->end() <= sect->limit(), "sanity");
996 }
997 }
998
999 void CodeBuffer::log_section_sizes(const char* name) {
1000 if (xtty != nullptr) {
1001 ttyLocker ttyl;
1002 // log info about buffer usage
1003 xtty->print_cr("<blob name='%s' total_size='%d'>", name, _total_size);
1004 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) {
1005 CodeSection* sect = code_section(n);
1006 if (!sect->is_allocated() || sect->is_empty()) continue;
1007 xtty->print_cr("<sect index='%d' capacity='%d' size='%d' remaining='%d'/>",
1008 n, sect->capacity(), sect->size(), sect->remaining());
1009 }
1010 xtty->print_cr("</blob>");
1011 }
1012 }
1013
1014 bool CodeBuffer::finalize_stubs() {
1015 // Record size of code before we generate stubs in instructions section
1016 _main_code_size = _insts.size();
1017 if (_finalize_stubs && !pd_finalize_stubs()) {
1018 // stub allocation failure
1019 return false;
1020 }
1021 _finalize_stubs = false;
1022 return true;
1023 }
1024
1025 void CodeBuffer::shared_stub_to_interp_for(ciMethod* callee, csize_t call_offset) {
1026 if (_shared_stub_to_interp_requests == nullptr) {
1027 _shared_stub_to_interp_requests = new SharedStubToInterpRequests(8);
1028 }
1029 SharedStubToInterpRequest request(callee, call_offset);
1030 _shared_stub_to_interp_requests->push(request);
1034 #ifndef PRODUCT
1035 void CodeBuffer::block_comment(ptrdiff_t offset, const char* comment) {
1036 if (_collect_comments) {
1037 const char* str = _asm_remarks.insert(offset, comment);
1038 postcond(str != comment);
1039 }
1040 }
1041
1042 const char* CodeBuffer::code_string(const char* str) {
1043 const char* tmp = _dbg_strings.insert(str);
1044 postcond(tmp != str);
1045 return tmp;
1046 }
1047
1048 void CodeBuffer::decode() {
1049 ttyLocker ttyl;
1050 Disassembler::decode(decode_begin(), insts_end(), tty NOT_PRODUCT(COMMA &asm_remarks()));
1051 _decode_begin = insts_end();
1052 }
1053
1054 void CodeSection::print(const char* name) {
1055 csize_t locs_size = locs_end() - locs_start();
1056 tty->print_cr(" %7s.code = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d)",
1057 name, p2i(start()), p2i(end()), p2i(limit()), size(), capacity());
1058 tty->print_cr(" %7s.locs = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d) point=%d",
1059 name, p2i(locs_start()), p2i(locs_end()), p2i(locs_limit()), locs_size, locs_capacity(), locs_point_off());
1060 if (PrintRelocations) {
1061 RelocIterator iter(this);
1062 iter.print();
1063 }
1064 }
1065
1066 void CodeBuffer::print() {
1067 tty->print_cr("CodeBuffer:");
1068 for (int n = 0; n < (int)SECT_LIMIT; n++) {
1069 // print each section
1070 CodeSection* cs = code_section(n);
1071 cs->print(code_section_name(n));
1072 }
1073 }
1074
1075 // ----- CHeapString -----------------------------------------------------------
1076
1077 class CHeapString : public CHeapObj<mtCode> {
1078 public:
1079 CHeapString(const char* str) : _string(os::strdup(str)) {}
1080 ~CHeapString() {
1081 os::free((void*)_string);
1082 _string = nullptr;
1083 }
1084 const char* string() const { return _string; }
1085
1086 private:
1087 const char* _string;
1088 };
1089
1090 // ----- AsmRemarkCollection ---------------------------------------------------
1091
|
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 "precompiled.hpp"
26 #include "asm/codeBuffer.hpp"
27 #include "code/compiledIC.hpp"
28 #include "code/oopRecorder.inline.hpp"
29 #include "compiler/disassembler.hpp"
30 #include "logging/log.hpp"
31 #include "oops/klass.inline.hpp"
32 #include "oops/methodCounters.hpp"
33 #include "oops/methodData.hpp"
34 #include "oops/oop.inline.hpp"
35 #include "runtime/icache.hpp"
36 #include "runtime/safepointVerifiers.hpp"
37 #include "utilities/align.hpp"
38 #include "utilities/copy.hpp"
39 #include "utilities/powerOfTwo.hpp"
40 #include "utilities/xmlstream.hpp"
41
42 // The structure of a CodeSection:
43 //
44 // _start -> +----------------+
45 // | machine code...|
46 // _end -> |----------------|
47 // | |
48 // | (empty) |
49 // | |
50 // | |
51 // +----------------+
52 // _limit -> | |
520 void CodeBuffer::finalize_oop_references(const methodHandle& mh) {
521 NoSafepointVerifier nsv;
522
523 GrowableArray<oop> oops;
524
525 // Make sure that immediate metadata records something in the OopRecorder
526 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) {
527 // pull code out of each section
528 CodeSection* cs = code_section(n);
529 if (cs->is_empty() || !cs->has_locs()) continue; // skip trivial section
530 RelocIterator iter(cs);
531 while (iter.next()) {
532 if (iter.type() == relocInfo::metadata_type) {
533 metadata_Relocation* md = iter.metadata_reloc();
534 if (md->metadata_is_immediate()) {
535 Metadata* m = md->metadata_value();
536 if (oop_recorder()->is_real(m)) {
537 if (m->is_methodData()) {
538 m = ((MethodData*)m)->method();
539 }
540 if (m->is_methodCounters()) {
541 m = ((MethodCounters*)m)->method();
542 }
543 if (m->is_method()) {
544 m = ((Method*)m)->method_holder();
545 }
546 if (m->is_klass()) {
547 append_oop_references(&oops, (Klass*)m);
548 } else {
549 // XXX This will currently occur for MDO which don't
550 // have a backpointer. This has to be fixed later.
551 m->print();
552 ShouldNotReachHere();
553 }
554 }
555 }
556 }
557 }
558 }
559
560 if (!oop_recorder()->is_unused()) {
561 for (int i = 0; i < oop_recorder()->metadata_count(); i++) {
562 Metadata* m = oop_recorder()->metadata_at(i);
563 if (oop_recorder()->is_real(m)) {
564 if (m->is_methodData()) {
565 m = ((MethodData*)m)->method();
566 }
567 if (m->is_methodCounters()) {
568 m = ((MethodCounters*)m)->method();
569 }
570 if (m->is_method()) {
571 m = ((Method*)m)->method_holder();
572 }
573 if (m->is_klass()) {
574 append_oop_references(&oops, (Klass*)m);
575 } else {
576 m->print();
577 ShouldNotReachHere();
578 }
579 }
580 }
581
582 }
583
584 // Add the class loader of Method* for the nmethod itself
585 append_oop_references(&oops, mh->method_holder());
586
587 // Add any oops that we've found
588 Thread* thread = Thread::current();
589 for (int i = 0; i < oops.length(); i++) {
712 csize_t CodeBuffer::copy_relocations_to(CodeBlob* dest) const {
713 address buf = nullptr;
714 csize_t buf_offset = 0;
715 csize_t buf_limit = 0;
716
717 if (dest != nullptr) {
718 buf = (address)dest->relocation_begin();
719 buf_limit = (address)dest->relocation_end() - buf;
720 }
721 // if dest is null, this is just the sizing pass
722 //
723 buf_offset = copy_relocations_to(buf, buf_limit, false);
724
725 return buf_offset;
726 }
727
728 void CodeBuffer::copy_code_to(CodeBlob* dest_blob) {
729 #ifndef PRODUCT
730 if (PrintNMethods && (WizardMode || Verbose)) {
731 tty->print("done with CodeBuffer:");
732 ((CodeBuffer*)this)->print_on(tty);
733 }
734 #endif //PRODUCT
735
736 CodeBuffer dest(dest_blob);
737 assert(dest_blob->content_size() >= total_content_size(), "good sizing");
738 this->compute_final_layout(&dest);
739
740 // Set beginning of constant table before relocating.
741 dest_blob->set_ctable_begin(dest.consts()->start());
742
743 relocate_code_to(&dest);
744
745 // Share assembly remarks and debug strings with the blob.
746 NOT_PRODUCT(dest_blob->use_remarks(_asm_remarks));
747 NOT_PRODUCT(dest_blob->use_strings(_dbg_strings));
748
749 // Done moving code bytes; were they the right size?
750 assert((int)align_up(dest.total_content_size(), oopSize) == dest_blob->content_size(), "sanity");
751
752 // Flush generated code
853 exp = 0;
854 }
855 // Allow for inter-section slop:
856 exp += CodeSection::end_slop();
857 csize_t new_cap = sect->size() + exp;
858 if (new_cap < sect->capacity()) {
859 // No need to expand after all.
860 new_cap = sect->capacity();
861 }
862 new_capacity[n] = new_cap;
863 new_total_cap += new_cap;
864 }
865
866 return new_total_cap;
867 }
868
869 void CodeBuffer::expand(CodeSection* which_cs, csize_t amount) {
870 #ifndef PRODUCT
871 if (PrintNMethods && (WizardMode || Verbose)) {
872 tty->print("expanding CodeBuffer:");
873 this->print_on(tty);
874 }
875
876 if (StressCodeBuffers && blob() != nullptr) {
877 static int expand_count = 0;
878 if (expand_count >= 0) expand_count += 1;
879 if (expand_count > 100 && is_power_of_2(expand_count)) {
880 tty->print_cr("StressCodeBuffers: have expanded %d times", expand_count);
881 // simulate an occasional allocation failure:
882 free_blob();
883 }
884 }
885 #endif //PRODUCT
886
887 // Resizing must be allowed
888 {
889 if (blob() == nullptr) return; // caller must check if blob is null
890 }
891
892 // Figure new capacity for each section.
893 csize_t new_capacity[SECT_LIMIT];
936
937 // Move all the code and relocations to the new blob:
938 relocate_code_to(&cb);
939
940 // Copy the temporary code buffer into the current code buffer.
941 // Basically, do {*this = cb}, except for some control information.
942 this->take_over_code_from(&cb);
943 cb.set_blob(nullptr);
944
945 // Zap the old code buffer contents, to avoid mistakenly using them.
946 debug_only(Copy::fill_to_bytes(bxp->_total_start, bxp->_total_size,
947 badCodeHeapFreeVal);)
948
949 // Make certain that the new sections are all snugly inside the new blob.
950 debug_only(verify_section_allocation();)
951
952 #ifndef PRODUCT
953 _decode_begin = nullptr; // sanity
954 if (PrintNMethods && (WizardMode || Verbose)) {
955 tty->print("expanded CodeBuffer:");
956 this->print_on(tty);
957 }
958 #endif //PRODUCT
959 }
960
961 void CodeBuffer::take_over_code_from(CodeBuffer* cb) {
962 // Must already have disposed of the old blob somehow.
963 assert(blob() == nullptr, "must be empty");
964 // Take the new blob away from cb.
965 set_blob(cb->blob());
966 // Take over all the section pointers.
967 for (int n = 0; n < (int)SECT_LIMIT; n++) {
968 CodeSection* cb_sect = cb->code_section(n);
969 CodeSection* this_sect = code_section(n);
970 this_sect->take_over_code_from(cb_sect);
971 }
972 _overflow_arena = cb->_overflow_arena;
973 cb->_overflow_arena = nullptr;
974 // Make sure the old cb won't try to use it or free it.
975 DEBUG_ONLY(cb->_blob = (BufferBlob*)badAddress);
976 }
981 address tend = tstart + _total_size;
982 if (_blob != nullptr) {
983 guarantee(tstart >= _blob->content_begin(), "sanity");
984 guarantee(tend <= _blob->content_end(), "sanity");
985 }
986 // Verify disjointness.
987 for (int n = (int) SECT_FIRST; n < (int) SECT_LIMIT; n++) {
988 CodeSection* sect = code_section(n);
989 if (!sect->is_allocated() || sect->is_empty()) {
990 continue;
991 }
992 guarantee(_blob == nullptr || is_aligned(sect->start(), sect->alignment()),
993 "start is aligned");
994 for (int m = n + 1; m < (int) SECT_LIMIT; m++) {
995 CodeSection* other = code_section(m);
996 if (!other->is_allocated() || other == sect) {
997 continue;
998 }
999 guarantee(other->disjoint(sect), "sanity");
1000 }
1001 guarantee(sect->end() <= tend, "sanity, sect_end: " PTR_FORMAT " tend: " PTR_FORMAT " size: %d", p2i(sect->end()), p2i(tend), (int)_total_size);
1002 guarantee(sect->end() <= sect->limit(), "sanity, sect_end: " PTR_FORMAT " sect_limit: " PTR_FORMAT, p2i(sect->end()), p2i(sect->limit()));
1003 }
1004 }
1005
1006 void CodeBuffer::log_section_sizes(const char* name) {
1007 if (xtty != nullptr) {
1008 ttyLocker ttyl;
1009 // log info about buffer usage
1010 xtty->head("blob name='%s' total_size='%d'", name, _total_size);
1011 for (int n = (int) CodeBuffer::SECT_FIRST; n < (int) CodeBuffer::SECT_LIMIT; n++) {
1012 CodeSection* sect = code_section(n);
1013 if (!sect->is_allocated() || sect->is_empty()) continue;
1014 xtty->elem("sect index='%d' capacity='%d' size='%d' remaining='%d'",
1015 n, sect->capacity(), sect->size(), sect->remaining());
1016 }
1017 xtty->tail("blob");
1018 }
1019 }
1020
1021 bool CodeBuffer::finalize_stubs() {
1022 // Record size of code before we generate stubs in instructions section
1023 _main_code_size = _insts.size();
1024 if (_finalize_stubs && !pd_finalize_stubs()) {
1025 // stub allocation failure
1026 return false;
1027 }
1028 _finalize_stubs = false;
1029 return true;
1030 }
1031
1032 void CodeBuffer::shared_stub_to_interp_for(ciMethod* callee, csize_t call_offset) {
1033 if (_shared_stub_to_interp_requests == nullptr) {
1034 _shared_stub_to_interp_requests = new SharedStubToInterpRequests(8);
1035 }
1036 SharedStubToInterpRequest request(callee, call_offset);
1037 _shared_stub_to_interp_requests->push(request);
1041 #ifndef PRODUCT
1042 void CodeBuffer::block_comment(ptrdiff_t offset, const char* comment) {
1043 if (_collect_comments) {
1044 const char* str = _asm_remarks.insert(offset, comment);
1045 postcond(str != comment);
1046 }
1047 }
1048
1049 const char* CodeBuffer::code_string(const char* str) {
1050 const char* tmp = _dbg_strings.insert(str);
1051 postcond(tmp != str);
1052 return tmp;
1053 }
1054
1055 void CodeBuffer::decode() {
1056 ttyLocker ttyl;
1057 Disassembler::decode(decode_begin(), insts_end(), tty NOT_PRODUCT(COMMA &asm_remarks()));
1058 _decode_begin = insts_end();
1059 }
1060
1061 void CodeSection::print_on(outputStream* st, const char* name) {
1062 csize_t locs_size = locs_end() - locs_start();
1063 st->print_cr(" %7s.code = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d)",
1064 name, p2i(start()), p2i(end()), p2i(limit()), size(), capacity());
1065 st->print_cr(" %7s.locs = " PTR_FORMAT " : " PTR_FORMAT " : " PTR_FORMAT " (%d of %d) point=%d",
1066 name, p2i(locs_start()), p2i(locs_end()), p2i(locs_limit()), locs_size, locs_capacity(), locs_point_off());
1067 if (PrintRelocations) {
1068 RelocIterator iter(this);
1069 iter.print_on(st);
1070 }
1071 }
1072
1073 void CodeBuffer::print_on(outputStream* st) {
1074 #if 0
1075 if (this == nullptr) { // gcc complains 'nonnull' argument 'this' compared to NULL
1076 st->print_cr("null CodeBuffer pointer");
1077 return;
1078 }
1079 #endif
1080
1081 st->print_cr("CodeBuffer:%s", name());
1082 for (int n = 0; n < (int)SECT_LIMIT; n++) {
1083 // print each section
1084 CodeSection* cs = code_section(n);
1085 cs->print_on(st, code_section_name(n));
1086 }
1087 }
1088
1089 // ----- CHeapString -----------------------------------------------------------
1090
1091 class CHeapString : public CHeapObj<mtCode> {
1092 public:
1093 CHeapString(const char* str) : _string(os::strdup(str)) {}
1094 ~CHeapString() {
1095 os::free((void*)_string);
1096 _string = nullptr;
1097 }
1098 const char* string() const { return _string; }
1099
1100 private:
1101 const char* _string;
1102 };
1103
1104 // ----- AsmRemarkCollection ---------------------------------------------------
1105
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