hg: jdk/jdk: 8222670: pathological case of JIT recompilation and code cache bloat

[tobias.hartmann at oracle.com]

Changeset: 1dc9bf9d016b
Author:    xliu
Date:      2019-05-07 09:17 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/1dc9bf9d016b

8222670: pathological case of JIT recompilation and code cache bloat
Summary: Prevent downgraded compilation tasks from recompiling.
Reviewed-by: sgehwolf, thartmann

! src/hotspot/share/compiler/compileBroker.hpp
! src/hotspot/share/oops/instanceKlass.cpp
! src/hotspot/share/prims/whitebox.cpp
! src/hotspot/share/runtime/tieredThresholdPolicy.cpp
+ test/hotspot/jtreg/compiler/tiered/Level2RecompilationTest.java
! test/lib/sun/hotspot/WhiteBox.java