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https://github.com/openjdk/jdk.git
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8151956: Support non-continuous CodeBlobs in HotSpot
Reviewed-by: iveresov, thartmann, simonis
This commit is contained in:
Rickard Bäckman
parent
67ff4391ec
commit
b853eb7f5c
100 changed files with 2486 additions and 1868 deletions
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@ -25,68 +25,11 @@
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#ifndef SHARE_VM_CODE_NMETHOD_HPP
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#define SHARE_VM_CODE_NMETHOD_HPP
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#include "code/codeBlob.hpp"
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#include "code/pcDesc.hpp"
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#include "oops/metadata.hpp"
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#include "code/compiledMethod.hpp"
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class DepChange;
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class DirectiveSet;
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// This class is used internally by nmethods, to cache
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// exception/pc/handler information.
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class ExceptionCache : public CHeapObj<mtCode> {
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friend class VMStructs;
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private:
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enum { cache_size = 16 };
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Klass* _exception_type;
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address _pc[cache_size];
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address _handler[cache_size];
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volatile int _count;
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ExceptionCache* _next;
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address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; }
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void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; }
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address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; }
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void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; }
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int count() { return OrderAccess::load_acquire(&_count); }
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// increment_count is only called under lock, but there may be concurrent readers.
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void increment_count() { OrderAccess::release_store(&_count, _count + 1); }
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public:
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ExceptionCache(Handle exception, address pc, address handler);
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Klass* exception_type() { return _exception_type; }
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ExceptionCache* next() { return _next; }
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void set_next(ExceptionCache *ec) { _next = ec; }
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address match(Handle exception, address pc);
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bool match_exception_with_space(Handle exception) ;
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address test_address(address addr);
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bool add_address_and_handler(address addr, address handler) ;
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};
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// cache pc descs found in earlier inquiries
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class PcDescCache VALUE_OBJ_CLASS_SPEC {
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friend class VMStructs;
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private:
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enum { cache_size = 4 };
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// The array elements MUST be volatile! Several threads may modify
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// and read from the cache concurrently. find_pc_desc_internal has
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// returned wrong results. C++ compiler (namely xlC12) may duplicate
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// C++ field accesses if the elements are not volatile.
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typedef PcDesc* PcDescPtr;
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volatile PcDescPtr _pc_descs[cache_size]; // last cache_size pc_descs found
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public:
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PcDescCache() { debug_only(_pc_descs[0] = NULL); }
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void reset_to(PcDesc* initial_pc_desc);
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PcDesc* find_pc_desc(int pc_offset, bool approximate);
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void add_pc_desc(PcDesc* pc_desc);
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PcDesc* last_pc_desc() { return _pc_descs[0]; }
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};
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// nmethods (native methods) are the compiled code versions of Java methods.
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//
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// An nmethod contains:
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@ -108,26 +51,14 @@ class PcDescCache VALUE_OBJ_CLASS_SPEC {
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// [Implicit Null Pointer exception table]
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// - implicit null table array
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class DepChange;
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class Dependencies;
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class ExceptionHandlerTable;
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class ImplicitExceptionTable;
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class AbstractCompiler;
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class xmlStream;
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class nmethod : public CodeBlob {
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class nmethod : public CompiledMethod {
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friend class VMStructs;
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friend class JVMCIVMStructs;
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friend class NMethodSweeper;
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friend class CodeCache; // scavengable oops
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private:
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// GC support to help figure out if an nmethod has been
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// cleaned/unloaded by the current GC.
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static unsigned char _global_unloading_clock;
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// Shared fields for all nmethod's
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Method* _method;
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int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method
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jmethodID _jmethod_id; // Cache of method()->jmethod_id()
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@ -140,13 +71,6 @@ class nmethod : public CodeBlob {
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// To support simple linked-list chaining of nmethods:
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nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head
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union {
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// Used by G1 to chain nmethods.
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nmethod* _unloading_next;
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// Used by non-G1 GCs to chain nmethods.
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nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods
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};
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static nmethod* volatile _oops_do_mark_nmethods;
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nmethod* volatile _oops_do_mark_link;
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@ -158,13 +82,7 @@ class nmethod : public CodeBlob {
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address _osr_entry_point; // entry point for on stack replacement
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// Offsets for different nmethod parts
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int _exception_offset;
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// All deoptee's will resume execution at this location described by
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// this offset.
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int _deoptimize_offset;
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// All deoptee's at a MethodHandle call site will resume execution
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// at this location described by this offset.
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int _deoptimize_mh_offset;
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int _exception_offset;
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// Offset of the unwind handler if it exists
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int _unwind_handler_offset;
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@ -179,6 +97,8 @@ class nmethod : public CodeBlob {
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int _nul_chk_table_offset;
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int _nmethod_end_offset;
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int code_offset() const { return (address) code_begin() - header_begin(); }
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// location in frame (offset for sp) that deopt can store the original
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// pc during a deopt.
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int _orig_pc_offset;
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@ -189,27 +109,12 @@ class nmethod : public CodeBlob {
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// protected by CodeCache_lock
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bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock)
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enum MarkForDeoptimizationStatus {
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not_marked,
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deoptimize,
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deoptimize_noupdate };
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MarkForDeoptimizationStatus _mark_for_deoptimization_status; // Used for stack deoptimization
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// used by jvmti to track if an unload event has been posted for this nmethod.
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bool _unload_reported;
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// set during construction
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unsigned int _has_unsafe_access:1; // May fault due to unsafe access.
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unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes?
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unsigned int _lazy_critical_native:1; // Lazy JNI critical native
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unsigned int _has_wide_vectors:1; // Preserve wide vectors at safepoints
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// Protected by Patching_lock
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volatile unsigned char _state; // {in_use, not_entrant, zombie, unloaded}
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volatile unsigned char _unloading_clock; // Incremented after GC unloaded/cleaned the nmethod
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#ifdef ASSERT
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bool _oops_are_stale; // indicates that it's no longer safe to access oops section
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#endif
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@ -242,9 +147,6 @@ class nmethod : public CodeBlob {
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// counter is decreased (by 1) while sweeping.
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int _hotness_counter;
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ExceptionCache * volatile _exception_cache;
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PcDescCache _pc_desc_cache;
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// These are used for compiled synchronized native methods to
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// locate the owner and stack slot for the BasicLock so that we can
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// properly revoke the bias of the owner if necessary. They are
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@ -302,18 +204,21 @@ class nmethod : public CodeBlob {
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// Returns true if this thread changed the state of the nmethod or
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// false if another thread performed the transition.
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bool make_not_entrant_or_zombie(unsigned int state);
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bool make_entrant() { Unimplemented(); return false; }
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void inc_decompile_count();
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// Used to manipulate the exception cache
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void add_exception_cache_entry(ExceptionCache* new_entry);
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ExceptionCache* exception_cache_entry_for_exception(Handle exception);
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// Inform external interfaces that a compiled method has been unloaded
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void post_compiled_method_unload();
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// Initailize fields to their default values
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void init_defaults();
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// Offsets
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int content_offset() const { return content_begin() - header_begin(); }
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int data_offset() const { return _data_offset; }
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address header_end() const { return (address) header_begin() + header_size(); }
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public:
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// create nmethod with entry_bci
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static nmethod* new_nmethod(const methodHandle& method,
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@ -334,7 +239,7 @@ class nmethod : public CodeBlob {
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, Handle installed_code = Handle(),
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Handle speculation_log = Handle()
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#endif
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);
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);
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static nmethod* new_native_nmethod(const methodHandle& method,
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int compile_id,
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@ -347,13 +252,10 @@ class nmethod : public CodeBlob {
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OopMapSet* oop_maps);
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// accessors
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Method* method() const { return _method; }
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AbstractCompiler* compiler() const { return _compiler; }
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// type info
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bool is_nmethod() const { return true; }
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bool is_java_method() const { return !method()->is_native(); }
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bool is_native_method() const { return method()->is_native(); }
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bool is_osr_method() const { return _entry_bci != InvocationEntryBci; }
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bool is_compiled_by_c1() const;
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@ -363,22 +265,17 @@ class nmethod : public CodeBlob {
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// boundaries for different parts
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address consts_begin () const { return header_begin() + _consts_offset ; }
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address consts_end () const { return header_begin() + code_offset() ; }
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address insts_begin () const { return header_begin() + code_offset() ; }
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address insts_end () const { return header_begin() + _stub_offset ; }
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address consts_end () const { return code_begin() ; }
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address stub_begin () const { return header_begin() + _stub_offset ; }
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address stub_end () const { return header_begin() + _oops_offset ; }
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address exception_begin () const { return header_begin() + _exception_offset ; }
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address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; }
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address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; }
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address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; }
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oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; }
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oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; }
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Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; }
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Metadata** metadata_end () const { return (Metadata**) (header_begin() + _scopes_data_offset) ; }
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Metadata** metadata_end () const { return (Metadata**) _scopes_data_begin; }
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address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; }
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address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; }
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PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); }
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PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; }
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@ -390,16 +287,9 @@ class nmethod : public CodeBlob {
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address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; }
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// Sizes
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int consts_size () const { return consts_end () - consts_begin (); }
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int insts_size () const { return insts_end () - insts_begin (); }
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int stub_size () const { return stub_end () - stub_begin (); }
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int oops_size () const { return (address) oops_end () - (address) oops_begin (); }
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int metadata_size () const { return (address) metadata_end () - (address) metadata_begin (); }
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int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); }
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int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); }
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int dependencies_size () const { return dependencies_end () - dependencies_begin (); }
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int handler_table_size() const { return handler_table_end() - handler_table_begin(); }
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int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); }
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int oops_count() const { assert(oops_size() % oopSize == 0, ""); return (oops_size() / oopSize) + 1; }
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int metadata_count() const { assert(metadata_size() % wordSize == 0, ""); return (metadata_size() / wordSize) + 1; }
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@ -411,15 +301,10 @@ class nmethod : public CodeBlob {
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int hotness_counter() const { return _hotness_counter; }
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// Containment
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bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); }
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bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); }
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bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); }
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bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); }
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bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); }
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bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); }
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bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); }
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bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); }
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bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); }
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// entry points
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address entry_point() const { return _entry_point; } // normal entry point
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@ -434,24 +319,11 @@ class nmethod : public CodeBlob {
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// flag accessing and manipulation
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bool is_in_use() const { return _state == in_use; }
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bool is_alive() const { unsigned char s = _state; return s == in_use || s == not_entrant; }
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bool is_alive() const { unsigned char s = _state; return s < zombie; }
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bool is_not_entrant() const { return _state == not_entrant; }
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bool is_zombie() const { return _state == zombie; }
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bool is_unloaded() const { return _state == unloaded; }
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// returns a string version of the nmethod state
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const char* state() const {
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switch(_state) {
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case in_use: return "in use";
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case not_entrant: return "not_entrant";
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case zombie: return "zombie";
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case unloaded: return "unloaded";
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default:
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fatal("unexpected nmethod state: %d", _state);
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return NULL;
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}
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}
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#if INCLUDE_RTM_OPT
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// rtm state accessing and manipulating
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RTMState rtm_state() const { return _rtm_state; }
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@ -466,30 +338,15 @@ class nmethod : public CodeBlob {
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assert(!method()->is_method_handle_intrinsic(), "Cannot make MH intrinsic not entrant");
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return make_not_entrant_or_zombie(not_entrant);
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}
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bool make_not_used() { return make_not_entrant(); }
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bool make_zombie() { return make_not_entrant_or_zombie(zombie); }
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// used by jvmti to track if the unload event has been reported
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bool unload_reported() { return _unload_reported; }
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void set_unload_reported() { _unload_reported = true; }
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void set_unloading_next(nmethod* next) { _unloading_next = next; }
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nmethod* unloading_next() { return _unloading_next; }
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static unsigned char global_unloading_clock() { return _global_unloading_clock; }
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static void increase_unloading_clock();
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void set_unloading_clock(unsigned char unloading_clock);
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unsigned char unloading_clock();
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bool is_marked_for_deoptimization() const { return _mark_for_deoptimization_status != not_marked; }
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void mark_for_deoptimization(bool inc_recompile_counts = true) {
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_mark_for_deoptimization_status = (inc_recompile_counts ? deoptimize : deoptimize_noupdate);
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}
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bool update_recompile_counts() const {
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// Update recompile counts when either the update is explicitly requested (deoptimize)
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// or the nmethod is not marked for deoptimization at all (not_marked).
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// The latter happens during uncommon traps when deoptimized nmethod is made not entrant.
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return _mark_for_deoptimization_status != deoptimize_noupdate;
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int get_state() const {
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return _state;
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}
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void make_unloaded(BoolObjectClosure* is_alive, oop cause);
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@ -502,18 +359,6 @@ class nmethod : public CodeBlob {
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_has_flushed_dependencies = 1;
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}
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bool has_unsafe_access() const { return _has_unsafe_access; }
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void set_has_unsafe_access(bool z) { _has_unsafe_access = z; }
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bool has_method_handle_invokes() const { return _has_method_handle_invokes; }
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void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
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bool is_lazy_critical_native() const { return _lazy_critical_native; }
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void set_lazy_critical_native(bool z) { _lazy_critical_native = z; }
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bool has_wide_vectors() const { return _has_wide_vectors; }
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void set_has_wide_vectors(bool z) { _has_wide_vectors = z; }
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int comp_level() const { return _comp_level; }
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// Support for oops in scopes and relocs:
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@ -538,9 +383,6 @@ class nmethod : public CodeBlob {
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void copy_values(GrowableArray<jobject>* oops);
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void copy_values(GrowableArray<Metadata*>* metadata);
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Method* attached_method(address call_pc);
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Method* attached_method_before_pc(address pc);
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// Relocation support
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private:
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void fix_oop_relocations(address begin, address end, bool initialize_immediates);
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@ -549,10 +391,6 @@ private:
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public:
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void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); }
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void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); }
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void verify_oop_relocations();
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bool is_at_poll_return(address pc);
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bool is_at_poll_or_poll_return(address pc);
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// Scavengable oop support
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bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; }
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@ -576,15 +414,6 @@ public:
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long stack_traversal_mark() { return _stack_traversal_mark; }
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void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; }
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// Exception cache support
|
||||
// Note: _exception_cache may be read concurrently. We rely on memory_order_consume here.
|
||||
ExceptionCache* exception_cache() const { return _exception_cache; }
|
||||
void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; }
|
||||
void release_set_exception_cache(ExceptionCache *ec) { OrderAccess::release_store_ptr(&_exception_cache, ec); }
|
||||
address handler_for_exception_and_pc(Handle exception, address pc);
|
||||
void add_handler_for_exception_and_pc(Handle exception, address pc, address handler);
|
||||
void clean_exception_cache(BoolObjectClosure* is_alive);
|
||||
|
||||
// implicit exceptions support
|
||||
address continuation_for_implicit_exception(address pc);
|
||||
|
||||
|
|
@ -595,24 +424,8 @@ public:
|
|||
nmethod* osr_link() const { return _osr_link; }
|
||||
void set_osr_link(nmethod *n) { _osr_link = n; }
|
||||
|
||||
// tells whether frames described by this nmethod can be deoptimized
|
||||
// note: native wrappers cannot be deoptimized.
|
||||
bool can_be_deoptimized() const { return is_java_method(); }
|
||||
|
||||
// Inline cache support
|
||||
void clear_inline_caches();
|
||||
void clear_ic_stubs();
|
||||
void cleanup_inline_caches(bool clean_all = false);
|
||||
bool inlinecache_check_contains(address addr) const {
|
||||
return (addr >= code_begin() && addr < verified_entry_point());
|
||||
}
|
||||
|
||||
// Verify calls to dead methods have been cleaned.
|
||||
void verify_clean_inline_caches();
|
||||
// Verify and count cached icholder relocations.
|
||||
int verify_icholder_relocations();
|
||||
// Check that all metadata is still alive
|
||||
void verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive);
|
||||
|
||||
// unlink and deallocate this nmethod
|
||||
// Only NMethodSweeper class is expected to use this. NMethodSweeper is not
|
||||
|
|
@ -653,20 +466,19 @@ public:
|
|||
public:
|
||||
#endif
|
||||
|
||||
// GC support
|
||||
void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
// The parallel versions are used by G1.
|
||||
bool do_unloading_parallel(BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
void do_unloading_parallel_postponed(BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
protected:
|
||||
virtual bool do_unloading_oops(address low_boundary, BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
#if INCLUDE_JVMCI
|
||||
virtual bool do_unloading_jvmci(BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
#endif
|
||||
|
||||
private:
|
||||
bool do_unloading_scopes(BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
// Unload a nmethod if the *root object is dead.
|
||||
bool can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred);
|
||||
bool unload_if_dead_at(RelocIterator *iter_at_oop, BoolObjectClosure* is_alive, bool unloading_occurred);
|
||||
|
||||
public:
|
||||
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map,
|
||||
OopClosure* f);
|
||||
void oops_do(OopClosure* f) { oops_do(f, false); }
|
||||
void oops_do(OopClosure* f, bool allow_zombie);
|
||||
bool detect_scavenge_root_oops();
|
||||
|
|
@ -678,49 +490,20 @@ public:
|
|||
static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; }
|
||||
bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }
|
||||
|
||||
// ScopeDesc for an instruction
|
||||
ScopeDesc* scope_desc_at(address pc);
|
||||
|
||||
private:
|
||||
ScopeDesc* scope_desc_in(address begin, address end);
|
||||
|
||||
address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); }
|
||||
|
||||
PcDesc* find_pc_desc_internal(address pc, bool approximate);
|
||||
|
||||
PcDesc* find_pc_desc(address pc, bool approximate) {
|
||||
PcDesc* desc = _pc_desc_cache.last_pc_desc();
|
||||
if (desc != NULL && desc->pc_offset() == pc - code_begin()) {
|
||||
return desc;
|
||||
}
|
||||
return find_pc_desc_internal(pc, approximate);
|
||||
}
|
||||
|
||||
public:
|
||||
// ScopeDesc retrieval operation
|
||||
PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); }
|
||||
// pc_desc_near returns the first PcDesc at or after the givne pc.
|
||||
PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); }
|
||||
|
||||
public:
|
||||
// copying of debugging information
|
||||
void copy_scopes_pcs(PcDesc* pcs, int count);
|
||||
void copy_scopes_data(address buffer, int size);
|
||||
|
||||
// Deopt
|
||||
// Return true is the PC is one would expect if the frame is being deopted.
|
||||
bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); }
|
||||
bool is_deopt_entry (address pc);
|
||||
bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); }
|
||||
// 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; }
|
||||
|
||||
static address get_deopt_original_pc(const frame* fr);
|
||||
|
||||
// MethodHandle
|
||||
bool is_method_handle_return(address return_pc);
|
||||
|
||||
// jvmti support:
|
||||
void post_compiled_method_load_event();
|
||||
jmethodID get_and_cache_jmethod_id();
|
||||
|
|
@ -770,7 +553,7 @@ public:
|
|||
// are numbered in an independent sequence if CICountOSR is true,
|
||||
// and native method wrappers are also numbered independently if
|
||||
// CICountNative is true.
|
||||
int compile_id() const { return _compile_id; }
|
||||
virtual int compile_id() const { return _compile_id; }
|
||||
const char* compile_kind() const;
|
||||
|
||||
// tells if any of this method's dependencies have been invalidated
|
||||
|
|
@ -789,7 +572,7 @@ public:
|
|||
// 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.
|
||||
bool is_dependent_on_method(Method* dependee);
|
||||
virtual bool is_dependent_on_method(Method* dependee);
|
||||
|
||||
// is it ok to patch at address?
|
||||
bool is_patchable_at(address instr_address);
|
||||
|
|
@ -807,12 +590,7 @@ public:
|
|||
static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); }
|
||||
static int state_offset() { return offset_of(nmethod, _state); }
|
||||
|
||||
// RedefineClasses support. Mark metadata in nmethods as on_stack so that
|
||||
// redefine classes doesn't purge it.
|
||||
static void mark_on_stack(nmethod* nm) {
|
||||
nm->metadata_do(Metadata::mark_on_stack);
|
||||
}
|
||||
void metadata_do(void f(Metadata*));
|
||||
virtual void metadata_do(void f(Metadata*));
|
||||
};
|
||||
|
||||
// Locks an nmethod so its code will not get removed and it will not
|
||||
|
|
@ -821,26 +599,43 @@ public:
|
|||
// needs to be done, then lock_nmethod() is used directly to keep the
|
||||
// generated code from being reused too early.
|
||||
class nmethodLocker : public StackObj {
|
||||
nmethod* _nm;
|
||||
CompiledMethod* _nm;
|
||||
|
||||
public:
|
||||
|
||||
// note: nm can be NULL
|
||||
// Only JvmtiDeferredEvent::compiled_method_unload_event()
|
||||
// should pass zombie_ok == true.
|
||||
static void lock_nmethod(nmethod* nm, bool zombie_ok = false);
|
||||
static void unlock_nmethod(nmethod* nm); // (ditto)
|
||||
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() { _nm = NULL; }
|
||||
~nmethodLocker() { unlock_nmethod(_nm); }
|
||||
nmethodLocker(CompiledMethod *nm) {
|
||||
_nm = nm;
|
||||
lock(_nm);
|
||||
}
|
||||
|
||||
nmethod* code() { return _nm; }
|
||||
void set_code(nmethod* new_nm) {
|
||||
unlock_nmethod(_nm); // note: This works even if _nm==new_nm.
|
||||
static void lock(CompiledMethod* method) {
|
||||
if (method == NULL) return;
|
||||
lock_nmethod(method);
|
||||
}
|
||||
|
||||
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) {
|
||||
unlock(_nm); // note: This works even if _nm==new_nm.
|
||||
_nm = new_nm;
|
||||
lock_nmethod(_nm);
|
||||
lock(_nm);
|
||||
}
|
||||
};
|
||||
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue