RFR: 8250548: libgraal can deadlock in -Xcomp mode

[Tom Rodriguez]

Looks good.

tom

Doug Simon wrote on 7/24/20 9:53 AM:
> Please review this bug fix for a deadlock in libgraal under Xcomp.
> 
> BUG:
> https://bugs.openjdk.java.net/browse/JDK-8250548
> 
> PATCH:
> 
> diff -r 1f37a5cd6afc src/hotspot/share/compiler/compileBroker.cpp
> --- a/src/hotspot/share/compiler/compileBroker.cpp      Fri Jul 24 11:00:50 2020 -0400
> +++ b/src/hotspot/share/compiler/compileBroker.cpp      Fri Jul 24 18:52:30 2020 +0200
> @@ -1655,7 +1655,7 @@
>     bool free_task;
>   #if INCLUDE_JVMCI
>     AbstractCompiler* comp = compiler(task->comp_level());
> -  if (!UseJVMCINativeLibrary && comp->is_jvmci() && !task->should_wait_for_compilation()) {
> +  if (comp->is_jvmci() && !task->should_wait_for_compilation()) {
>       // It may return before compilation is completed.
>       free_task = wait_for_jvmci_completion((JVMCICompiler*) comp, task, thread);
>     } else
> 
> 
> Testing: hs-tier1,hs-tier2,hs-tier3-graal
> 
> -Doug
>