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8212989: Allow CompiledMethod ExceptionCache have unloaded klasses

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Reviewed-by: kvn, pliden
This commit is contained in:
Erik Österlund 2018-11-05 08:01:39 +01:00
parent fdb010502b
commit f2fe71b186
6 changed files with 118 additions and 23 deletions
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7
src/hotspot/share/code/codeCache.hpp
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@ -72,8 +72,9 @@
// existing ones, make sure to adapt the dtrace scripts (jhelper.d) for
// Solaris and BSD.
class OopClosure;
class ExceptionCache;
class KlassDepChange;
class OopClosure;
class CodeCache : AllStatic {
friend class VMStructs;
@ -94,6 +95,8 @@ class CodeCache : AllStatic {
static nmethod* _scavenge_root_nmethods; // linked via nm->scavenge_root_link()
static uint8_t _unloading_cycle; // Global state for recognizing old nmethods that need to be unloaded
static ExceptionCache* volatile _exception_cache_purge_list;
static void mark_scavenge_root_nmethods() PRODUCT_RETURN;
static void verify_perm_nmethods(CodeBlobClosure* f_or_null) PRODUCT_RETURN;
@ -192,6 +195,8 @@ class CodeCache : AllStatic {
static uint16_t unloading_cycle() { return _unloading_cycle; }
static void increment_unloading_cycle();
static void asserted_non_scavengable_nmethods_do(CodeBlobClosure* f = NULL) PRODUCT_RETURN;
static void release_exception_cache(ExceptionCache* entry);
static void purge_exception_caches();
// Apply f to every live code blob in scavengable nmethods. Prune nmethods
// from the list of scavengable nmethods if f->fix_relocations() and a nmethod