| /* |
| * Copyright (c) 1997, 2023, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #ifndef SHARE_CODE_NMETHOD_HPP |
| #define SHARE_CODE_NMETHOD_HPP |
| |
| #include "code/compiledMethod.hpp" |
| |
| class CompileTask; |
| class DepChange; |
| class DirectiveSet; |
| class DebugInformationRecorder; |
| class JvmtiThreadState; |
| class OopIterateClosure; |
| |
| // nmethods (native methods) are the compiled code versions of Java methods. |
| // |
| // An nmethod contains: |
| // - header (the nmethod structure) |
| // [Relocation] |
| // - relocation information |
| // - constant part (doubles, longs and floats used in nmethod) |
| // - oop table |
| // [Code] |
| // - code body |
| // - exception handler |
| // - stub code |
| // [Debugging information] |
| // - oop array |
| // - data array |
| // - pcs |
| // [Exception handler table] |
| // - handler entry point array |
| // [Implicit Null Pointer exception table] |
| // - implicit null table array |
| // [Speculations] |
| // - encoded speculations array |
| // [JVMCINMethodData] |
| // - meta data for JVMCI compiled nmethod |
| |
| #if INCLUDE_JVMCI |
| class FailedSpeculation; |
| class JVMCINMethodData; |
| #endif |
| |
| class nmethod : public CompiledMethod { |
| friend class VMStructs; |
| friend class JVMCIVMStructs; |
| friend class CodeCache; // scavengable oops |
| friend class JVMCINMethodData; |
| |
| private: |
| |
| uint64_t _gc_epoch; |
| |
| // To support simple linked-list chaining of nmethods: |
| nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head |
| |
| // STW two-phase nmethod root processing helpers. |
| // |
| // When determining liveness of a given nmethod to do code cache unloading, |
| // some collectors need to do different things depending on whether the nmethods |
| // need to absolutely be kept alive during root processing; "strong"ly reachable |
| // nmethods are known to be kept alive at root processing, but the liveness of |
| // "weak"ly reachable ones is to be determined later. |
| // |
| // We want to allow strong and weak processing of nmethods by different threads |
| // at the same time without heavy synchronization. Additional constraints are |
| // to make sure that every nmethod is processed a minimal amount of time, and |
| // nmethods themselves are always iterated at most once at a particular time. |
| // |
| // Note that strong processing work must be a superset of weak processing work |
| // for this code to work. |
| // |
| // We store state and claim information in the _oops_do_mark_link member, using |
| // the two LSBs for the state and the remaining upper bits for linking together |
| // nmethods that were already visited. |
| // The last element is self-looped, i.e. points to itself to avoid some special |
| // "end-of-list" sentinel value. |
| // |
| // _oops_do_mark_link special values: |
| // |
| // _oops_do_mark_link == nullptr: the nmethod has not been visited at all yet, i.e. |
| // is Unclaimed. |
| // |
| // For other values, its lowest two bits indicate the following states of the nmethod: |
| // |
| // weak_request (WR): the nmethod has been claimed by a thread for weak processing |
| // weak_done (WD): weak processing has been completed for this nmethod. |
| // strong_request (SR): the nmethod has been found to need strong processing while |
| // being weak processed. |
| // strong_done (SD): strong processing has been completed for this nmethod . |
| // |
| // The following shows the _only_ possible progressions of the _oops_do_mark_link |
| // pointer. |
| // |
| // Given |
| // N as the nmethod |
| // X the current next value of _oops_do_mark_link |
| // |
| // Unclaimed (C)-> N|WR (C)-> X|WD: the nmethod has been processed weakly by |
| // a single thread. |
| // Unclaimed (C)-> N|WR (C)-> X|WD (O)-> X|SD: after weak processing has been |
| // completed (as above) another thread found that the nmethod needs strong |
| // processing after all. |
| // Unclaimed (C)-> N|WR (O)-> N|SR (C)-> X|SD: during weak processing another |
| // thread finds that the nmethod needs strong processing, marks it as such and |
| // terminates. The original thread completes strong processing. |
| // Unclaimed (C)-> N|SD (C)-> X|SD: the nmethod has been processed strongly from |
| // the beginning by a single thread. |
| // |
| // "|" describes the concatenation of bits in _oops_do_mark_link. |
| // |
| // The diagram also describes the threads responsible for changing the nmethod to |
| // the next state by marking the _transition_ with (C) and (O), which mean "current" |
| // and "other" thread respectively. |
| // |
| struct oops_do_mark_link; // Opaque data type. |
| |
| // States used for claiming nmethods during root processing. |
| static const uint claim_weak_request_tag = 0; |
| static const uint claim_weak_done_tag = 1; |
| static const uint claim_strong_request_tag = 2; |
| static const uint claim_strong_done_tag = 3; |
| |
| static oops_do_mark_link* mark_link(nmethod* nm, uint tag) { |
| assert(tag <= claim_strong_done_tag, "invalid tag %u", tag); |
| assert(is_aligned(nm, 4), "nmethod pointer must have zero lower two LSB"); |
| return (oops_do_mark_link*)(((uintptr_t)nm & ~0x3) | tag); |
| } |
| |
| static uint extract_state(oops_do_mark_link* link) { |
| return (uint)((uintptr_t)link & 0x3); |
| } |
| |
| static nmethod* extract_nmethod(oops_do_mark_link* link) { |
| return (nmethod*)((uintptr_t)link & ~0x3); |
| } |
| |
| void oops_do_log_change(const char* state); |
| |
| static bool oops_do_has_weak_request(oops_do_mark_link* next) { |
| return extract_state(next) == claim_weak_request_tag; |
| } |
| |
| static bool oops_do_has_any_strong_state(oops_do_mark_link* next) { |
| return extract_state(next) >= claim_strong_request_tag; |
| } |
| |
| // Attempt Unclaimed -> N|WR transition. Returns true if successful. |
| bool oops_do_try_claim_weak_request(); |
| |
| // Attempt Unclaimed -> N|SD transition. Returns the current link. |
| oops_do_mark_link* oops_do_try_claim_strong_done(); |
| // Attempt N|WR -> X|WD transition. Returns nullptr if successful, X otherwise. |
| nmethod* oops_do_try_add_to_list_as_weak_done(); |
| |
| // Attempt X|WD -> N|SR transition. Returns the current link. |
| oops_do_mark_link* oops_do_try_add_strong_request(oops_do_mark_link* next); |
| // Attempt X|WD -> X|SD transition. Returns true if successful. |
| bool oops_do_try_claim_weak_done_as_strong_done(oops_do_mark_link* next); |
| |
| // Do the N|SD -> X|SD transition. |
| void oops_do_add_to_list_as_strong_done(); |
| |
| // Sets this nmethod as strongly claimed (as part of N|SD -> X|SD and N|SR -> X|SD |
| // transitions). |
| void oops_do_set_strong_done(nmethod* old_head); |
| |
| static nmethod* volatile _oops_do_mark_nmethods; |
| oops_do_mark_link* volatile _oops_do_mark_link; |
| |
| // offsets for entry points |
| address _entry_point; // entry point with class check |
| address _verified_entry_point; // entry point without class check |
| address _osr_entry_point; // entry point for on stack replacement |
| |
| bool _is_unlinked; |
| |
| // Shared fields for all nmethod's |
| int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method |
| |
| // Offsets for different nmethod parts |
| int _exception_offset; |
| // Offset of the unwind handler if it exists |
| int _unwind_handler_offset; |
| |
| int _consts_offset; |
| int _stub_offset; |
| int _oops_offset; // offset to where embedded oop table begins (inside data) |
| int _metadata_offset; // embedded meta data table |
| int _scopes_data_offset; |
| int _scopes_pcs_offset; |
| int _dependencies_offset; |
| int _handler_table_offset; |
| int _nul_chk_table_offset; |
| #if INCLUDE_JVMCI |
| int _speculations_offset; |
| int _jvmci_data_offset; |
| #endif |
| int _nmethod_end_offset; |
| |
| int code_offset() const { return (address) code_begin() - header_begin(); } |
| |
| // location in frame (offset for sp) that deopt can store the original |
| // pc during a deopt. |
| int _orig_pc_offset; |
| |
| int _compile_id; // which compilation made this nmethod |
| |
| #if INCLUDE_RTM_OPT |
| // RTM state at compile time. Used during deoptimization to decide |
| // whether to restart collecting RTM locking abort statistic again. |
| RTMState _rtm_state; |
| #endif |
| |
| // These are used for compiled synchronized native methods to |
| // locate the owner and stack slot for the BasicLock. They are |
| // needed because there is no debug information for compiled native |
| // wrappers and the oop maps are insufficient to allow |
| // frame::retrieve_receiver() to work. Currently they are expected |
| // to be byte offsets from the Java stack pointer for maximum code |
| // sharing between platforms. JVMTI's GetLocalInstance() uses these |
| // offsets to find the receiver for non-static native wrapper frames. |
| ByteSize _native_receiver_sp_offset; |
| ByteSize _native_basic_lock_sp_offset; |
| |
| CompLevel _comp_level; // compilation level |
| |
| // Local state used to keep track of whether unloading is happening or not |
| volatile uint8_t _is_unloading_state; |
| |
| // protected by CodeCache_lock |
| bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
| |
| // used by jvmti to track if an event has been posted for this nmethod. |
| bool _load_reported; |
| |
| // Protected by CompiledMethod_lock |
| volatile signed char _state; // {not_installed, in_use, not_used, not_entrant} |
| |
| int _skipped_instructions_size; |
| |
| // For native wrappers |
| nmethod(Method* method, |
| CompilerType type, |
| int nmethod_size, |
| int compile_id, |
| CodeOffsets* offsets, |
| CodeBuffer *code_buffer, |
| int frame_size, |
| ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ |
| ByteSize basic_lock_sp_offset, /* synchronized natives only */ |
| OopMapSet* oop_maps); |
| |
| // Creation support |
| nmethod(Method* method, |
| CompilerType type, |
| int nmethod_size, |
| int compile_id, |
| int entry_bci, |
| CodeOffsets* offsets, |
| int orig_pc_offset, |
| DebugInformationRecorder *recorder, |
| Dependencies* dependencies, |
| CodeBuffer *code_buffer, |
| int frame_size, |
| OopMapSet* oop_maps, |
| ExceptionHandlerTable* handler_table, |
| ImplicitExceptionTable* nul_chk_table, |
| AbstractCompiler* compiler, |
| CompLevel comp_level |
| #if INCLUDE_JVMCI |
| , char* speculations = nullptr, |
| int speculations_len = 0, |
| JVMCINMethodData* jvmci_data = nullptr |
| #endif |
| ); |
| |
| // helper methods |
| void* operator new(size_t size, int nmethod_size, int comp_level) throw(); |
| // For method handle intrinsics: Try MethodNonProfiled, MethodProfiled and NonNMethod. |
| // Attention: Only allow NonNMethod space for special nmethods which don't need to be |
| // findable by nmethod iterators! In particular, they must not contain oops! |
| void* operator new(size_t size, int nmethod_size, bool allow_NonNMethod_space) throw(); |
| |
| const char* reloc_string_for(u_char* begin, u_char* end); |
| |
| bool try_transition(int new_state); |
| |
| // Returns true if this thread changed the state of the nmethod or |
| // false if another thread performed the transition. |
| bool make_entrant() { Unimplemented(); return false; } |
| void inc_decompile_count(); |
| |
| // Inform external interfaces that a compiled method has been unloaded |
| void post_compiled_method_unload(); |
| |
| // Initialize fields to their default values |
| void init_defaults(); |
| |
| // Offsets |
| int content_offset() const { return content_begin() - header_begin(); } |
| int data_offset() const { return _data_offset; } |
| |
| address header_end() const { return (address) header_begin() + header_size(); } |
| |
| public: |
| // create nmethod with entry_bci |
| static nmethod* new_nmethod(const methodHandle& method, |
| int compile_id, |
| int entry_bci, |
| CodeOffsets* offsets, |
| int orig_pc_offset, |
| DebugInformationRecorder* recorder, |
| Dependencies* dependencies, |
| CodeBuffer *code_buffer, |
| int frame_size, |
| OopMapSet* oop_maps, |
| ExceptionHandlerTable* handler_table, |
| ImplicitExceptionTable* nul_chk_table, |
| AbstractCompiler* compiler, |
| CompLevel comp_level |
| #if INCLUDE_JVMCI |
| , char* speculations = nullptr, |
| int speculations_len = 0, |
| JVMCINMethodData* jvmci_data = nullptr |
| #endif |
| ); |
| |
| // Only used for unit tests. |
| nmethod() |
| : CompiledMethod(), |
| _native_receiver_sp_offset(in_ByteSize(-1)), |
| _native_basic_lock_sp_offset(in_ByteSize(-1)), |
| _is_unloading_state(0) {} |
| |
| |
| static nmethod* new_native_nmethod(const methodHandle& method, |
| int compile_id, |
| CodeBuffer *code_buffer, |
| int vep_offset, |
| int frame_complete, |
| int frame_size, |
| ByteSize receiver_sp_offset, |
| ByteSize basic_lock_sp_offset, |
| OopMapSet* oop_maps, |
| int exception_handler = -1); |
| |
| // type info |
| bool is_nmethod() const { return true; } |
| bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } |
| |
| // boundaries for different parts |
| address consts_begin () const { return header_begin() + _consts_offset ; } |
| address consts_end () const { return code_begin() ; } |
| address stub_begin () const { return header_begin() + _stub_offset ; } |
| address stub_end () const { return header_begin() + _oops_offset ; } |
| address exception_begin () const { return header_begin() + _exception_offset ; } |
| address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : nullptr; } |
| oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
| oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; } |
| |
| Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; } |
| Metadata** metadata_end () const { return (Metadata**) _scopes_data_begin; } |
| |
| address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } |
| PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } |
| PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } |
| address dependencies_begin () const { return header_begin() + _dependencies_offset ; } |
| address dependencies_end () const { return header_begin() + _handler_table_offset ; } |
| address handler_table_begin () const { return header_begin() + _handler_table_offset ; } |
| address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } |
| address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } |
| |
| int skipped_instructions_size () const { return _skipped_instructions_size ; } |
| |
| #if INCLUDE_JVMCI |
| address nul_chk_table_end () const { return header_begin() + _speculations_offset ; } |
| address speculations_begin () const { return header_begin() + _speculations_offset ; } |
| address speculations_end () const { return header_begin() + _jvmci_data_offset ; } |
| address jvmci_data_begin () const { return header_begin() + _jvmci_data_offset ; } |
| address jvmci_data_end () const { return header_begin() + _nmethod_end_offset ; } |
| #else |
| address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } |
| #endif |
| |
| // Sizes |
| int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
| int metadata_size () const { return (address) metadata_end () - (address) metadata_begin (); } |
| int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
| #if INCLUDE_JVMCI |
| int speculations_size () const { return speculations_end () - speculations_begin (); } |
| int jvmci_data_size () const { return jvmci_data_end () - jvmci_data_begin (); } |
| #endif |
| |
| int oops_count() const { assert(oops_size() % oopSize == 0, ""); return (oops_size() / oopSize) + 1; } |
| int metadata_count() const { assert(metadata_size() % wordSize == 0, ""); return (metadata_size() / wordSize) + 1; } |
| |
| int total_size () const; |
| |
| // Containment |
| bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
| bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } |
| bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
| bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } |
| |
| // entry points |
| address entry_point() const { return _entry_point; } // normal entry point |
| address verified_entry_point() const { return _verified_entry_point; } // if klass is correct |
| |
| // flag accessing and manipulation |
| bool is_not_installed() const { return _state == not_installed; } |
| bool is_in_use() const { return _state <= in_use; } |
| bool is_not_entrant() const { return _state == not_entrant; } |
| |
| void clear_unloading_state(); |
| // Heuristically deduce an nmethod isn't worth keeping around |
| bool is_cold(); |
| virtual bool is_unloading(); |
| virtual void do_unloading(bool unloading_occurred); |
| |
| bool is_unlinked() const { return _is_unlinked; } |
| void set_is_unlinked() { assert(!_is_unlinked, "already unlinked"); _is_unlinked = true; } |
| |
| #if INCLUDE_RTM_OPT |
| // rtm state accessing and manipulating |
| RTMState rtm_state() const { return _rtm_state; } |
| void set_rtm_state(RTMState state) { _rtm_state = state; } |
| #endif |
| |
| bool make_in_use() { |
| return try_transition(in_use); |
| } |
| // Make the nmethod non entrant. The nmethod will continue to be |
| // alive. It is used when an uncommon trap happens. Returns true |
| // if this thread changed the state of the nmethod or false if |
| // another thread performed the transition. |
| bool make_not_entrant(); |
| bool make_not_used() { return make_not_entrant(); } |
| |
| int get_state() const { |
| return _state; |
| } |
| |
| bool has_dependencies() { return dependencies_size() != 0; } |
| void print_dependencies_on(outputStream* out) PRODUCT_RETURN; |
| void flush_dependencies(); |
| bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
| void set_has_flushed_dependencies() { |
| assert(!has_flushed_dependencies(), "should only happen once"); |
| _has_flushed_dependencies = 1; |
| } |
| |
| int comp_level() const { return _comp_level; } |
| |
| void unlink_from_method(); |
| |
| // Support for oops in scopes and relocs: |
| // Note: index 0 is reserved for null. |
| oop oop_at(int index) const; |
| oop oop_at_phantom(int index) const; // phantom reference |
| oop* oop_addr_at(int index) const { // for GC |
| // relocation indexes are biased by 1 (because 0 is reserved) |
| assert(index > 0 && index <= oops_count(), "must be a valid non-zero index"); |
| return &oops_begin()[index - 1]; |
| } |
| |
| // Support for meta data in scopes and relocs: |
| // Note: index 0 is reserved for null. |
| Metadata* metadata_at(int index) const { return index == 0 ? nullptr: *metadata_addr_at(index); } |
| Metadata** metadata_addr_at(int index) const { // for GC |
| // relocation indexes are biased by 1 (because 0 is reserved) |
| assert(index > 0 && index <= metadata_count(), "must be a valid non-zero index"); |
| return &metadata_begin()[index - 1]; |
| } |
| |
| void copy_values(GrowableArray<jobject>* oops); |
| void copy_values(GrowableArray<Metadata*>* metadata); |
| |
| // Relocation support |
| private: |
| void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
| inline void initialize_immediate_oop(oop* dest, jobject handle); |
| |
| public: |
| void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
| void fix_oop_relocations() { fix_oop_relocations(nullptr, nullptr, false); } |
| |
| // On-stack replacement support |
| int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
| address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
| void invalidate_osr_method(); |
| nmethod* osr_link() const { return _osr_link; } |
| void set_osr_link(nmethod *n) { _osr_link = n; } |
| |
| // Verify calls to dead methods have been cleaned. |
| void verify_clean_inline_caches(); |
| |
| // Unlink this nmethod from the system |
| void unlink(); |
| |
| // Deallocate this nmethod - called by the GC |
| void purge(bool free_code_cache_data, bool unregister_nmethod); |
| |
| // See comment at definition of _last_seen_on_stack |
| void mark_as_maybe_on_stack(); |
| bool is_maybe_on_stack(); |
| |
| // Evolution support. We make old (discarded) compiled methods point to new Method*s. |
| void set_method(Method* method) { _method = method; } |
| |
| #if INCLUDE_JVMCI |
| // Gets the JVMCI name of this nmethod. |
| const char* jvmci_name(); |
| |
| // Records the pending failed speculation in the |
| // JVMCI speculation log associated with this nmethod. |
| void update_speculation(JavaThread* thread); |
| |
| // Gets the data specific to a JVMCI compiled method. |
| // This returns a non-nullptr value iff this nmethod was |
| // compiled by the JVMCI compiler. |
| JVMCINMethodData* jvmci_nmethod_data() const { |
| return jvmci_data_size() == 0 ? nullptr : (JVMCINMethodData*) jvmci_data_begin(); |
| } |
| #endif |
| |
| public: |
| void oops_do(OopClosure* f) { oops_do(f, false); } |
| void oops_do(OopClosure* f, bool allow_dead); |
| |
| // All-in-one claiming of nmethods: returns true if the caller successfully claimed that |
| // nmethod. |
| bool oops_do_try_claim(); |
| |
| // Loom support for following nmethods on the stack |
| void follow_nmethod(OopIterateClosure* cl); |
| |
| // Class containing callbacks for the oops_do_process_weak/strong() methods |
| // below. |
| class OopsDoProcessor { |
| public: |
| // Process the oops of the given nmethod based on whether it has been called |
| // in a weak or strong processing context, i.e. apply either weak or strong |
| // work on it. |
| virtual void do_regular_processing(nmethod* nm) = 0; |
| // Assuming that the oops of the given nmethod has already been its weak |
| // processing applied, apply the remaining strong processing part. |
| virtual void do_remaining_strong_processing(nmethod* nm) = 0; |
| }; |
| |
| // The following two methods do the work corresponding to weak/strong nmethod |
| // processing. |
| void oops_do_process_weak(OopsDoProcessor* p); |
| void oops_do_process_strong(OopsDoProcessor* p); |
| |
| static void oops_do_marking_prologue(); |
| static void oops_do_marking_epilogue(); |
| |
| private: |
| ScopeDesc* scope_desc_in(address begin, address end); |
| |
| address* orig_pc_addr(const frame* fr); |
| |
| // used by jvmti to track if the load events has been reported |
| bool load_reported() const { return _load_reported; } |
| void set_load_reported() { _load_reported = true; } |
| |
| public: |
| // copying of debugging information |
| void copy_scopes_pcs(PcDesc* pcs, int count); |
| void copy_scopes_data(address buffer, int size); |
| |
| int orig_pc_offset() { return _orig_pc_offset; } |
| |
| // Post successful compilation |
| void post_compiled_method(CompileTask* task); |
| |
| // jvmti support: |
| void post_compiled_method_load_event(JvmtiThreadState* state = nullptr); |
| |
| // verify operations |
| void verify(); |
| void verify_scopes(); |
| void verify_interrupt_point(address interrupt_point); |
| |
| // Disassemble this nmethod with additional debug information, e.g. information about blocks. |
| void decode2(outputStream* st) const; |
| void print_constant_pool(outputStream* st); |
| |
| // Avoid hiding of parent's 'decode(outputStream*)' method. |
| void decode(outputStream* st) const { decode2(st); } // just delegate here. |
| |
| // printing support |
| void print() const; |
| void print(outputStream* st) const; |
| void print_code(); |
| |
| #if defined(SUPPORT_DATA_STRUCTS) |
| // print output in opt build for disassembler library |
| void print_relocations() PRODUCT_RETURN; |
| void print_pcs() { print_pcs_on(tty); } |
| void print_pcs_on(outputStream* st); |
| void print_scopes() { print_scopes_on(tty); } |
| void print_scopes_on(outputStream* st) PRODUCT_RETURN; |
| void print_value_on(outputStream* st) const; |
| void print_handler_table(); |
| void print_nul_chk_table(); |
| void print_recorded_oop(int log_n, int index); |
| void print_recorded_oops(); |
| void print_recorded_metadata(); |
| |
| void print_oops(outputStream* st); // oops from the underlying CodeBlob. |
| void print_metadata(outputStream* st); // metadata in metadata pool. |
| #else |
| // void print_pcs() PRODUCT_RETURN; |
| void print_pcs() { return; } |
| #endif |
| |
| void print_calls(outputStream* st) PRODUCT_RETURN; |
| static void print_statistics() PRODUCT_RETURN; |
| |
| void maybe_print_nmethod(const DirectiveSet* directive); |
| void print_nmethod(bool print_code); |
| |
| // need to re-define this from CodeBlob else the overload hides it |
| virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
| void print_on(outputStream* st, const char* msg) const; |
| |
| // Logging |
| void log_identity(xmlStream* log) const; |
| void log_new_nmethod() const; |
| void log_state_change() const; |
| |
| // Prints block-level comments, including nmethod specific block labels: |
| virtual void print_block_comment(outputStream* stream, address block_begin) const { |
| #if defined(SUPPORT_ASSEMBLY) || defined(SUPPORT_ABSTRACT_ASSEMBLY) |
| print_nmethod_labels(stream, block_begin); |
| CodeBlob::print_block_comment(stream, block_begin); |
| #endif |
| } |
| |
| void print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels=true) const; |
| const char* nmethod_section_label(address pos) const; |
| |
| // returns whether this nmethod has code comments. |
| bool has_code_comment(address begin, address end); |
| // Prints a comment for one native instruction (reloc info, pc desc) |
| void print_code_comment_on(outputStream* st, int column, address begin, address end); |
| |
| // Compiler task identification. Note that all OSR methods |
| // are numbered in an independent sequence if CICountOSR is true, |
| // and native method wrappers are also numbered independently if |
| // CICountNative is true. |
| virtual int compile_id() const { return _compile_id; } |
| const char* compile_kind() const; |
| |
| // tells if any of this method's dependencies have been invalidated |
| // (this is expensive!) |
| static void check_all_dependencies(DepChange& changes); |
| |
| // tells if this compiled method is dependent on the given changes, |
| // and the changes have invalidated it |
| bool check_dependency_on(DepChange& changes); |
| |
| // Fast breakpoint support. Tells if this compiled method is |
| // dependent on the given method. Returns true if this nmethod |
| // corresponds to the given method as well. |
| virtual bool is_dependent_on_method(Method* dependee); |
| |
| // JVMTI's GetLocalInstance() support |
| ByteSize native_receiver_sp_offset() { |
| return _native_receiver_sp_offset; |
| } |
| ByteSize native_basic_lock_sp_offset() { |
| return _native_basic_lock_sp_offset; |
| } |
| |
| // support for code generation |
| static ByteSize verified_entry_point_offset() { return byte_offset_of(nmethod, _verified_entry_point); } |
| static ByteSize osr_entry_point_offset() { return byte_offset_of(nmethod, _osr_entry_point); } |
| static ByteSize state_offset() { return byte_offset_of(nmethod, _state); } |
| |
| virtual void metadata_do(MetadataClosure* f); |
| |
| NativeCallWrapper* call_wrapper_at(address call) const; |
| NativeCallWrapper* call_wrapper_before(address return_pc) const; |
| address call_instruction_address(address pc) const; |
| |
| virtual CompiledStaticCall* compiledStaticCall_at(Relocation* call_site) const; |
| virtual CompiledStaticCall* compiledStaticCall_at(address addr) const; |
| virtual CompiledStaticCall* compiledStaticCall_before(address addr) const; |
| |
| virtual void make_deoptimized(); |
| void finalize_relocations(); |
| }; |
| |
| #endif // SHARE_CODE_NMETHOD_HPP |
