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8224674: NMethod state machine is not monotonic

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Reviewed-by: dlong, coleenp, thartmann
This commit is contained in:
Erik Österlund 2019-07-18 11:15:20 +02:00
parent e23d02b484
commit 03030e473c
5 changed files with 66 additions and 23 deletions
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5
src/hotspot/share/code/nmethod.hpp
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@ -212,6 +212,9 @@ class nmethod : public CompiledMethod {
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);
@ -339,7 +342,7 @@ class nmethod : public CompiledMethod {
// 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 < zombie; }
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; }