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class ImplicitExceptionTable;
class JvmtiThreadState;
class MetadataClosure;
class NativeCallWrapper;
class OopIterateClosure;
+ class SCCEntry;
class ScopeDesc;
class xmlStream;
// This class is used internally by nmethods, to cache
// exception/pc/handler information.
// Used to track in which deoptimize handshake this method will be deoptimized.
uint64_t _deoptimization_generation;
uint64_t _gc_epoch;
+ // Profiling counter used to figure out the hottest nmethods to record into CDS
+ volatile uint64_t _method_profiling_count;
+
Method* _method;
// To reduce header size union fields which usages do not overlap.
union {
// To support simple linked-list chaining of nmethods:
int _compile_id; // which compilation made this nmethod
CompLevel _comp_level; // compilation level (s1)
CompilerType _compiler_type; // which compiler made this nmethod (u1)
+ SCCEntry* _scc_entry;
+
+ bool _used; // has this nmethod ever been invoked?
+
// Local state used to keep track of whether unloading is happening or not
volatile uint8_t _is_unloading_state;
// Protected by NMethodState_lock
volatile signed char _state; // {not_installed, in_use, not_entrant}
_has_wide_vectors:1, // Preserve wide vectors at safepoints
_has_monitors:1, // Fastpath monitor detection for continuations
_has_scoped_access:1, // used by for shared scope closure (scopedMemoryAccess.cpp)
_has_flushed_dependencies:1, // Used for maintenance of dependencies (under CodeCache_lock)
_is_unlinked:1, // mark during class unloading
! _load_reported:1; // used by jvmti to track if an event has been posted for this nmethod
enum DeoptimizationStatus : u1 {
not_marked,
deoptimize,
deoptimize_noupdate,
_has_wide_vectors:1, // Preserve wide vectors at safepoints
_has_monitors:1, // Fastpath monitor detection for continuations
_has_scoped_access:1, // used by for shared scope closure (scopedMemoryAccess.cpp)
_has_flushed_dependencies:1, // Used for maintenance of dependencies (under CodeCache_lock)
_is_unlinked:1, // mark during class unloading
! _load_reported:1, // used by jvmti to track if an event has been posted for this nmethod
+ _preloaded:1,
+ _has_clinit_barriers:1;
enum DeoptimizationStatus : u1 {
not_marked,
deoptimize,
deoptimize_noupdate,
OopMapSet* oop_maps,
ExceptionHandlerTable* handler_table,
ImplicitExceptionTable* nul_chk_table,
AbstractCompiler* compiler,
CompLevel comp_level
+ , SCCEntry* scc_entry
#if INCLUDE_JVMCI
, char* speculations = nullptr,
int speculations_len = 0,
JVMCINMethodData* jvmci_data = nullptr
#endif
OopMapSet* oop_maps,
ExceptionHandlerTable* handler_table,
ImplicitExceptionTable* nul_chk_table,
AbstractCompiler* compiler,
CompLevel comp_level
+ , SCCEntry* scc_entry
#if INCLUDE_JVMCI
, char* speculations = nullptr,
int speculations_len = 0,
JVMCINMethodData* jvmci_data = nullptr
#endif
// Heuristically deduce an nmethod isn't worth keeping around
bool is_cold();
bool is_unloading();
void do_unloading(bool unloading_occurred);
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(const char* reason);
bool make_not_used() { return make_not_entrant("not used"); }
bool is_marked_for_deoptimization() const { return deoptimization_status() != not_marked; }
bool has_been_deoptimized() const { return deoptimization_status() == deoptimize_done; }
void set_deoptimized_done();
// Heuristically deduce an nmethod isn't worth keeping around
bool is_cold();
bool is_unloading();
void do_unloading(bool unloading_occurred);
+ void inc_method_profiling_count();
+ uint64_t method_profiling_count();
+
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(const char* reason, bool make_not_entrant = true);
bool make_not_used() { return make_not_entrant("not used"); }
bool is_marked_for_deoptimization() const { return deoptimization_status() != not_marked; }
bool has_been_deoptimized() const { return deoptimization_status() == deoptimize_done; }
void set_deoptimized_done();
void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; }
bool has_wide_vectors() const { return _has_wide_vectors; }
void set_has_wide_vectors(bool z) { _has_wide_vectors = z; }
+ bool has_clinit_barriers() const { return _has_clinit_barriers; }
+ void set_has_clinit_barriers(bool z) { _has_clinit_barriers = z; }
+
+ bool preloaded() const { return _preloaded; }
+ void set_preloaded(bool z) { _preloaded = z; }
+
bool has_flushed_dependencies() const { return _has_flushed_dependencies; }
void set_has_flushed_dependencies(bool z) {
assert(!has_flushed_dependencies(), "should only happen once");
_has_flushed_dependencies = z;
}
void copy_scopes_pcs(PcDesc* pcs, int count);
void copy_scopes_data(address buffer, int size);
int orig_pc_offset() { return _orig_pc_offset; }
+ SCCEntry* scc_entry() const { return _scc_entry; }
+ bool is_scc() const { return scc_entry() != nullptr; }
+
+ bool used() const { return _used; }
+ void set_used() { _used = true; }
+
// Post successful compilation
void post_compiled_method(CompileTask* task);
// jvmti support:
void post_compiled_method_load_event(JvmtiThreadState* state = nullptr);
void print_code();
void print_value_on_impl(outputStream* st) const;
#if defined(SUPPORT_DATA_STRUCTS)
// print output in opt build for disassembler library
! void print_relocations() PRODUCT_RETURN;
void print_pcs_on(outputStream* st);
void print_scopes() { print_scopes_on(tty); }
void print_scopes_on(outputStream* st) PRODUCT_RETURN;
void print_handler_table();
void print_nul_chk_table();
void print_code();
void print_value_on_impl(outputStream* st) const;
#if defined(SUPPORT_DATA_STRUCTS)
// print output in opt build for disassembler library
! void print_relocations_on(outputStream* st) PRODUCT_RETURN;
void print_pcs_on(outputStream* st);
void print_scopes() { print_scopes_on(tty); }
void print_scopes_on(outputStream* st) PRODUCT_RETURN;
void print_handler_table();
void print_nul_chk_table();
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