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7177745: JSR292: Many Callsite relinkages cause target method to always run in interpreter mode

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Reviewed-by: jrose, kvn
This commit is contained in:
Vladimir Ivanov 2016-02-19 20:40:20 +03:00
parent b239e217b9
commit 4532f54300
10 changed files with 140 additions and 13 deletions
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21
hotspot/src/share/vm/code/nmethod.hpp
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@ -107,6 +107,7 @@ class PcDescCache VALUE_OBJ_CLASS_SPEC {
// [Implicit Null Pointer exception table]
// - implicit null table array
class DepChange;
class Dependencies;
class ExceptionHandlerTable;
class ImplicitExceptionTable;
@ -188,7 +189,13 @@ class nmethod : public CodeBlob {
bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock)
bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper)
bool _marked_for_deoptimization; // Used for stack deoptimization
enum MarkForDeoptimizationStatus {
not_marked,
deoptimize,
deoptimize_noupdate };
MarkForDeoptimizationStatus _mark_for_deoptimization_status; // Used for stack deoptimization
// used by jvmti to track if an unload event has been posted for this nmethod.
bool _unload_reported;
@ -462,8 +469,16 @@ class nmethod : public CodeBlob {
void set_unloading_clock(unsigned char unloading_clock);
unsigned char unloading_clock();
bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; }
void mark_for_deoptimization() { _marked_for_deoptimization = true; }
bool is_marked_for_deoptimization() const { return _mark_for_deoptimization_status != not_marked; }
void mark_for_deoptimization(bool inc_recompile_counts = true) {
_mark_for_deoptimization_status = (inc_recompile_counts ? deoptimize : deoptimize_noupdate);
}
bool update_recompile_counts() const {
// Update recompile counts when either the update is explicitly requested (deoptimize)
// or the nmethod is not marked for deoptimization at all (not_marked).
// The latter happens during uncommon traps when deoptimized nmethod is made not entrant.
return _mark_for_deoptimization_status != deoptimize_noupdate;
}
void make_unloaded(BoolObjectClosure* is_alive, oop cause);