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 // These classes represent the stack-map substructures described in the JVMS
26 // (hence the non-conforming naming scheme).
27
28 // These classes work with the types in their compressed form in-place (as they
29 // would appear in the classfile). No virtual methods or fields allowed.
30
31 class verification_type_info {
32 private:
33 // u1 tag
34 // u2 cpool_index || u2 bci (for ITEM_Object & ITEM_Uninitailized only)
35
36 address tag_addr() const { return (address)this; }
37 address cpool_index_addr() const { return tag_addr() + sizeof(u1); }
38 address bci_addr() const { return cpool_index_addr(); }
39
40 protected:
41 // No constructors - should be 'private', but GCC issues a warning if it is
42 verification_type_info() {}
43 verification_type_info(const verification_type_info&) {}
44
897 u2 number_of_entries() const {
898 return Bytes::get_Java_u2(number_of_entries_addr()); }
899 stack_map_frame* entries() const {
900 return stack_map_frame::at(entries_addr());
901 }
902
903 static size_t header_size() {
904 return sizeof(u2) + sizeof(u4);
905 }
906
907 void set_name_index(u2 idx) {
908 Bytes::put_Java_u2(name_index_addr(), idx);
909 }
910 void set_attribute_length(u4 len) {
911 Bytes::put_Java_u4(attribute_length_addr(), len);
912 }
913 void set_number_of_entries(u2 num) {
914 Bytes::put_Java_u2(number_of_entries_addr(), num);
915 }
916 };
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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 #ifndef SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
26 #define SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
27
28 #include "classfile/verificationType.hpp"
29
30 // These classes represent the stack-map substructures described in the JVMS
31 // (hence the non-conforming naming scheme).
32
33 // These classes work with the types in their compressed form in-place (as they
34 // would appear in the classfile). No virtual methods or fields allowed.
35
36 class verification_type_info {
37 private:
38 // u1 tag
39 // u2 cpool_index || u2 bci (for ITEM_Object & ITEM_Uninitailized only)
40
41 address tag_addr() const { return (address)this; }
42 address cpool_index_addr() const { return tag_addr() + sizeof(u1); }
43 address bci_addr() const { return cpool_index_addr(); }
44
45 protected:
46 // No constructors - should be 'private', but GCC issues a warning if it is
47 verification_type_info() {}
48 verification_type_info(const verification_type_info&) {}
49
902 u2 number_of_entries() const {
903 return Bytes::get_Java_u2(number_of_entries_addr()); }
904 stack_map_frame* entries() const {
905 return stack_map_frame::at(entries_addr());
906 }
907
908 static size_t header_size() {
909 return sizeof(u2) + sizeof(u4);
910 }
911
912 void set_name_index(u2 idx) {
913 Bytes::put_Java_u2(name_index_addr(), idx);
914 }
915 void set_attribute_length(u4 len) {
916 Bytes::put_Java_u4(attribute_length_addr(), len);
917 }
918 void set_number_of_entries(u2 num) {
919 Bytes::put_Java_u2(number_of_entries_addr(), num);
920 }
921 };
922
923 #endif // SHARE_VM_CLASSFILE_STACKMAPTABLEFORMAT_HPP
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