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8288040: x86: Loom: Improve cont/monitor-count helper methods

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Reviewed-by: coleenp, rpressler
This commit is contained in:
Aleksey Shipilev 2022-06-09 08:16:22 +00:00
parent 5a89cb01bc
commit e5b56bafa9
8 changed files with 121 additions and 79 deletions
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13
src/hotspot/cpu/x86/templateTable_x86.cpp
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@ -2592,11 +2592,10 @@ void TemplateTable::_return(TosState state) {
#endif
__ jcc(Assembler::zero, no_safepoint);
__ push(state);
__ push_cont_fastpath(NOT_LP64(thread) LP64_ONLY(r15_thread));
__ push_cont_fastpath();
__ call_VM(noreg, CAST_FROM_FN_PTR(address,
InterpreterRuntime::at_safepoint));
NOT_LP64(__ get_thread(thread);)
__ pop_cont_fastpath(NOT_LP64(thread) LP64_ONLY(r15_thread));
__ pop_cont_fastpath();
__ pop(state);
__ bind(no_safepoint);
}
@ -4365,9 +4364,7 @@ void TemplateTable::monitorenter() {
__ lock_object(rmon);
// The object is stored so counter should be increased even if stackoverflow is generated
Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rbx);
NOT_LP64(__ get_thread(rthread);)
__ inc_held_monitor_count(rthread);
__ inc_held_monitor_count();
// check to make sure this monitor doesn't cause stack overflow after locking
__ save_bcp(); // in case of exception
@ -4428,9 +4425,7 @@ void TemplateTable::monitorexit() {
__ push_ptr(rax); // make sure object is on stack (contract with oopMaps)
__ unlock_object(rtop);
Register rthread = LP64_ONLY(r15_thread) NOT_LP64(rax);
NOT_LP64(__ get_thread(rthread);)
__ dec_held_monitor_count(rthread);
__ dec_held_monitor_count();
__ pop_ptr(rax); // discard object
}