801 lines
33 KiB
C++
801 lines
33 KiB
C++
/*
|
|
* Copyright (c) 1997, 2019, 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 DepChange;
|
|
class DirectiveSet;
|
|
class DebugInformationRecorder;
|
|
class JvmtiThreadState;
|
|
|
|
// 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 NMethodSweeper;
|
|
friend class CodeCache; // scavengable oops
|
|
friend class JVMCINMethodData;
|
|
|
|
private:
|
|
// Shared fields for all nmethod's
|
|
int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method
|
|
|
|
// 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 to 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 == NULL: 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 concatentation 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 NULL 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
|
|
|
|
// 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
|
|
int _comp_level; // compilation level
|
|
|
|
// 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 _unload_reported;
|
|
bool _load_reported;
|
|
|
|
// Protected by CompiledMethod_lock
|
|
volatile signed char _state; // {not_installed, in_use, not_entrant, zombie, unloaded}
|
|
|
|
#ifdef ASSERT
|
|
bool _oops_are_stale; // indicates that it's no longer safe to access oops section
|
|
#endif
|
|
|
|
#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
|
|
|
|
// Nmethod Flushing lock. If non-zero, then the nmethod is not removed
|
|
// and is not made into a zombie. However, once the nmethod is made into
|
|
// a zombie, it will be locked one final time if CompiledMethodUnload
|
|
// event processing needs to be done.
|
|
volatile jint _lock_count;
|
|
|
|
// not_entrant method removal. Each mark_sweep pass will update
|
|
// this mark to current sweep invocation count if it is seen on the
|
|
// stack. An not_entrant method can be removed when there are no
|
|
// more activations, i.e., when the _stack_traversal_mark is less than
|
|
// current sweep traversal index.
|
|
volatile long _stack_traversal_mark;
|
|
|
|
// The _hotness_counter indicates the hotness of a method. The higher
|
|
// the value the hotter the method. The hotness counter of a nmethod is
|
|
// set to [(ReservedCodeCacheSize / (1024 * 1024)) * 2] each time the method
|
|
// is active while stack scanning (do_stack_scanning()). The hotness
|
|
// counter is decreased (by 1) while sweeping.
|
|
int _hotness_counter;
|
|
|
|
// Local state used to keep track of whether unloading is happening or not
|
|
volatile uint8_t _is_unloading_state;
|
|
|
|
// These are used for compiled synchronized native methods to
|
|
// locate the owner and stack slot for the BasicLock so that we can
|
|
// properly revoke the bias of the owner if necessary. 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. Note that currently biased locking
|
|
// will never cause Class instances to be biased but this code
|
|
// handles the static synchronized case as well.
|
|
// JVMTI's GetLocalInstance() also uses these offsets to find the receiver
|
|
// for non-static native wrapper frames.
|
|
ByteSize _native_receiver_sp_offset;
|
|
ByteSize _native_basic_lock_sp_offset;
|
|
|
|
friend class nmethodLocker;
|
|
|
|
// 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,
|
|
int comp_level
|
|
#if INCLUDE_JVMCI
|
|
, char* speculations,
|
|
int speculations_len,
|
|
int jvmci_data_size
|
|
#endif
|
|
);
|
|
|
|
// helper methods
|
|
void* operator new(size_t size, int nmethod_size, int comp_level) 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_not_entrant_or_zombie(int state);
|
|
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();
|
|
|
|
// Initailize 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,
|
|
int comp_level
|
|
#if INCLUDE_JVMCI
|
|
, char* speculations = NULL,
|
|
int speculations_len = 0,
|
|
int nmethod_mirror_index = -1,
|
|
const char* nmethod_mirror_name = NULL,
|
|
FailedSpeculation** failed_speculations = NULL
|
|
#endif
|
|
);
|
|
|
|
// Only used for unit tests.
|
|
nmethod()
|
|
: CompiledMethod(),
|
|
_is_unloading_state(0),
|
|
_native_receiver_sp_offset(in_ByteSize(-1)),
|
|
_native_basic_lock_sp_offset(in_ByteSize(-1)) {}
|
|
|
|
|
|
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);
|
|
|
|
// 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) : NULL; }
|
|
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 ; }
|
|
#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;
|
|
|
|
void dec_hotness_counter() { _hotness_counter--; }
|
|
void set_hotness_counter(int val) { _hotness_counter = val; }
|
|
int hotness_counter() const { return _hotness_counter; }
|
|
|
|
// 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_alive() const { return _state < unloaded; }
|
|
bool is_not_entrant() const { return _state == not_entrant; }
|
|
bool is_zombie() const { return _state == zombie; }
|
|
bool is_unloaded() const { return _state == unloaded; }
|
|
|
|
void clear_unloading_state();
|
|
virtual bool is_unloading();
|
|
virtual void do_unloading(bool unloading_occurred);
|
|
|
|
#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() {
|
|
assert(!method()->is_method_handle_intrinsic(), "Cannot make MH intrinsic not entrant");
|
|
return make_not_entrant_or_zombie(not_entrant);
|
|
}
|
|
bool make_not_used() { return make_not_entrant(); }
|
|
bool make_zombie() { return make_not_entrant_or_zombie(zombie); }
|
|
|
|
int get_state() const {
|
|
return _state;
|
|
}
|
|
|
|
void make_unloaded();
|
|
|
|
bool has_dependencies() { return dependencies_size() != 0; }
|
|
void print_dependencies() PRODUCT_RETURN;
|
|
void flush_dependencies(bool delete_immediately);
|
|
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");
|
|
assert(!_oops_are_stale, "oops are stale");
|
|
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 ? NULL: *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(NULL, NULL, false); }
|
|
|
|
// Sweeper support
|
|
long stack_traversal_mark() { return _stack_traversal_mark; }
|
|
void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; }
|
|
|
|
// 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 and deallocate this nmethod
|
|
// Only NMethodSweeper class is expected to use this. NMethodSweeper is not
|
|
// expected to use any other private methods/data in this class.
|
|
|
|
protected:
|
|
void flush();
|
|
|
|
public:
|
|
// When true is returned, it is unsafe to remove this nmethod even if
|
|
// it is a zombie, since the VM or the ServiceThread might still be
|
|
// using it.
|
|
bool is_locked_by_vm() const { return _lock_count >0; }
|
|
|
|
// See comment at definition of _last_seen_on_stack
|
|
void mark_as_seen_on_stack();
|
|
bool can_convert_to_zombie();
|
|
|
|
// 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-NULL value iff this nmethod was
|
|
// compiled by the JVMCI compiler.
|
|
JVMCINMethodData* jvmci_nmethod_data() const {
|
|
return jvmci_data_size() == 0 ? NULL : (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();
|
|
|
|
// 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 and unload events has been reported
|
|
bool unload_reported() const { return _unload_reported; }
|
|
void set_unload_reported() { _unload_reported = true; }
|
|
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);
|
|
|
|
// Accessor/mutator for the original pc of a frame before a frame was deopted.
|
|
address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); }
|
|
void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; }
|
|
|
|
// jvmti support:
|
|
void post_compiled_method_load_event(JvmtiThreadState* state = NULL);
|
|
|
|
// 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_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(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);
|
|
|
|
// is it ok to patch at address?
|
|
bool is_patchable_at(address instr_address);
|
|
|
|
// UseBiasedLocking 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 int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); }
|
|
static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); }
|
|
static int state_offset() { return 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;
|
|
};
|
|
|
|
// Locks an nmethod so its code will not get removed and it will not
|
|
// be made into a zombie, even if it is a not_entrant method. After the
|
|
// nmethod becomes a zombie, if CompiledMethodUnload event processing
|
|
// needs to be done, then lock_nmethod() is used directly to keep the
|
|
// generated code from being reused too early.
|
|
class nmethodLocker : public StackObj {
|
|
CompiledMethod* _nm;
|
|
|
|
public:
|
|
|
|
// note: nm can be NULL
|
|
// Only JvmtiDeferredEvent::compiled_method_unload_event()
|
|
// should pass zombie_ok == true.
|
|
static void lock_nmethod(CompiledMethod* nm, bool zombie_ok = false);
|
|
static void unlock_nmethod(CompiledMethod* nm); // (ditto)
|
|
|
|
nmethodLocker(address pc); // derive nm from pc
|
|
nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); }
|
|
nmethodLocker(CompiledMethod *nm) {
|
|
_nm = nm;
|
|
lock(_nm);
|
|
}
|
|
|
|
static void lock(CompiledMethod* method, bool zombie_ok = false) {
|
|
if (method == NULL) return;
|
|
lock_nmethod(method, zombie_ok);
|
|
}
|
|
|
|
static void unlock(CompiledMethod* method) {
|
|
if (method == NULL) return;
|
|
unlock_nmethod(method);
|
|
}
|
|
|
|
nmethodLocker() { _nm = NULL; }
|
|
~nmethodLocker() {
|
|
unlock(_nm);
|
|
}
|
|
|
|
CompiledMethod* code() { return _nm; }
|
|
void set_code(CompiledMethod* new_nm, bool zombie_ok = false) {
|
|
unlock(_nm); // note: This works even if _nm==new_nm.
|
|
_nm = new_nm;
|
|
lock(_nm, zombie_ok);
|
|
}
|
|
};
|
|
|
|
#endif // SHARE_CODE_NMETHOD_HPP
|