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comparison src/share/vm/code/nmethod.hpp @ 2044:06f017f7daa7

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Merge.
author Thomas Wuerthinger <wuerthinger@ssw.jku.at>
date Fri, 07 Jan 2011 18:18:08 +0100
parents 4853c5cad3aa 09b4dd4f152b
children 0cd39a385a72
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1942:00bc9eaf0e24 2044:06f017f7daa7
20 * or visit www.oracle.com if you need additional information or have any 20 * or visit www.oracle.com if you need additional information or have any
21 * questions. 21 * questions.
22 * 22 *
23 */ 23 */
24 24
25 #ifndef SHARE_VM_CODE_NMETHOD_HPP
26 #define SHARE_VM_CODE_NMETHOD_HPP
27
28 #include "code/codeBlob.hpp"
29 #include "code/pcDesc.hpp"
30
25 // This class is used internally by nmethods, to cache 31 // This class is used internally by nmethods, to cache
26 // exception/pc/handler information. 32 // exception/pc/handler information.
27 33
28 class ExceptionCache : public CHeapObj { 34 class ExceptionCache : public CHeapObj {
29 friend class VMStructs; 35 friend class VMStructs;
202 long _stack_traversal_mark; 208 long _stack_traversal_mark;
203 209
204 ExceptionCache *_exception_cache; 210 ExceptionCache *_exception_cache;
205 PcDescCache _pc_desc_cache; 211 PcDescCache _pc_desc_cache;
206 212
207 // These are only used for compiled synchronized native methods to 213 // These are used for compiled synchronized native methods to
208 // locate the owner and stack slot for the BasicLock so that we can 214 // locate the owner and stack slot for the BasicLock so that we can
209 // properly revoke the bias of the owner if necessary. They are 215 // properly revoke the bias of the owner if necessary. They are
210 // needed because there is no debug information for compiled native 216 // needed because there is no debug information for compiled native
211 // wrappers and the oop maps are insufficient to allow 217 // wrappers and the oop maps are insufficient to allow
212 // frame::retrieve_receiver() to work. Currently they are expected 218 // frame::retrieve_receiver() to work. Currently they are expected
213 // to be byte offsets from the Java stack pointer for maximum code 219 // to be byte offsets from the Java stack pointer for maximum code
214 // sharing between platforms. Note that currently biased locking 220 // sharing between platforms. Note that currently biased locking
215 // will never cause Class instances to be biased but this code 221 // will never cause Class instances to be biased but this code
216 // handles the static synchronized case as well. 222 // handles the static synchronized case as well.
217 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; 223 // JVMTI's GetLocalInstance() also uses these offsets to find the receiver
218 ByteSize _compiled_synchronized_native_basic_lock_sp_offset; 224 // for non-static native wrapper frames.
225 ByteSize _native_receiver_sp_offset;
226 ByteSize _native_basic_lock_sp_offset;
219 227
220 friend class nmethodLocker; 228 friend class nmethodLocker;
221 229
222 // For native wrappers 230 // For native wrappers
223 nmethod(methodOop method, 231 nmethod(methodOop method,
671 679
672 // is it ok to patch at address? 680 // is it ok to patch at address?
673 bool is_patchable_at(address instr_address); 681 bool is_patchable_at(address instr_address);
674 682
675 // UseBiasedLocking support 683 // UseBiasedLocking support
676 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { 684 ByteSize native_receiver_sp_offset() {
677 return _compiled_synchronized_native_basic_lock_owner_sp_offset; 685 return _native_receiver_sp_offset;
678 } 686 }
679 ByteSize compiled_synchronized_native_basic_lock_sp_offset() { 687 ByteSize native_basic_lock_sp_offset() {
680 return _compiled_synchronized_native_basic_lock_sp_offset; 688 return _native_basic_lock_sp_offset;
681 } 689 }
682 690
683 // support for code generation 691 // support for code generation
684 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } 692 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); }
685 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } 693 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); }
705 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. 713 unlock_nmethod(_nm); // note: This works even if _nm==new_nm.
706 _nm = new_nm; 714 _nm = new_nm;
707 lock_nmethod(_nm); 715 lock_nmethod(_nm);
708 } 716 }
709 }; 717 };
718
719 #endif // SHARE_VM_CODE_NMETHOD_HPP