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 "c1/c1_MacroAssembler.hpp"
27 #include "c1/c1_Runtime1.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "gc_interface/collectedHeap.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "oops/arrayOop.hpp"
32 #include "oops/markOop.hpp"
33 #include "runtime/basicLock.hpp"
34 #include "runtime/biasedLocking.hpp"
35 #include "runtime/os.hpp"
36 #include "runtime/stubRoutines.hpp"
37
38 int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register disp_hdr, Register scratch, Label& slow_case) {
39 const int aligned_mask = BytesPerWord -1;
40 const int hdr_offset = oopDesc::mark_offset_in_bytes();
41 assert(hdr == rax, "hdr must be rax, for the cmpxchg instruction");
42 assert(hdr != obj && hdr != disp_hdr && obj != disp_hdr, "registers must be different");
43 Label done;
44 int null_check_offset = -1;
45
46 verify_oop(obj);
47
48 // save object being locked into the BasicObjectLock
49 movptr(Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()), obj);
50
51 if (UseBiasedLocking) {
52 assert(scratch != noreg, "should have scratch register at this point");
53 null_check_offset = biased_locking_enter(disp_hdr, obj, hdr, scratch, false, done, &slow_case);
54 } else {
55 null_check_offset = offset();
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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 "c1/c1_MacroAssembler.hpp"
27 #include "c1/c1_Runtime1.hpp"
28 #include "classfile/systemDictionary.hpp"
29 #include "gc_interface/collectedHeap.hpp"
30 #include "interpreter/interpreter.hpp"
31 #include "oops/arrayOop.hpp"
32 #include "oops/markOop.hpp"
33 #include "runtime/basicLock.hpp"
34 #include "runtime/biasedLocking.hpp"
35 #include "runtime/os.hpp"
36 #include "runtime/sharedRuntime.hpp"
37 #include "runtime/stubRoutines.hpp"
38
39 int C1_MacroAssembler::lock_object(Register hdr, Register obj, Register disp_hdr, Register scratch, Label& slow_case) {
40 const int aligned_mask = BytesPerWord -1;
41 const int hdr_offset = oopDesc::mark_offset_in_bytes();
42 assert(hdr == rax, "hdr must be rax, for the cmpxchg instruction");
43 assert(hdr != obj && hdr != disp_hdr && obj != disp_hdr, "registers must be different");
44 Label done;
45 int null_check_offset = -1;
46
47 verify_oop(obj);
48
49 // save object being locked into the BasicObjectLock
50 movptr(Address(disp_hdr, BasicObjectLock::obj_offset_in_bytes()), obj);
51
52 if (UseBiasedLocking) {
53 assert(scratch != noreg, "should have scratch register at this point");
54 null_check_offset = biased_locking_enter(disp_hdr, obj, hdr, scratch, false, done, &slow_case);
55 } else {
56 null_check_offset = offset();
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