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6964164: MonitorInUseLists leak of contended objects

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Fix MonitorInUseLists memory leak and MonitorBound now works

Reviewed-by: chrisphi, dice
This commit is contained in:
Karen Kinnear 2010-07-02 17:23:43 -04:00
parent 52adb9a491
commit 13ac5e3af2
3 changed files with 157 additions and 52 deletions
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8
hotspot/src/share/vm/runtime/synchronizer.hpp
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@ -122,8 +122,9 @@ class ObjectSynchronizer : AllStatic {
static void reenter (Handle obj, intptr_t recursion, TRAPS);
// thread-specific and global objectMonitor free list accessors
// static void verifyInUse (Thread * Self) ; too slow for general assert/debug
static ObjectMonitor * omAlloc (Thread * Self) ;
static void omRelease (Thread * Self, ObjectMonitor * m) ;
static void omRelease (Thread * Self, ObjectMonitor * m, bool FromPerThreadAlloc) ;
static void omFlush (Thread * Self) ;
// Inflate light weight monitor to heavy weight monitor
@ -150,6 +151,9 @@ class ObjectSynchronizer : AllStatic {
// Basically we deflate all monitors that are not busy.
// An adaptive profile-based deflation policy could be used if needed
static void deflate_idle_monitors();
static int walk_monitor_list(ObjectMonitor** listheadp,
ObjectMonitor** FreeHeadp,
ObjectMonitor** FreeTailp);
static bool deflate_monitor(ObjectMonitor* mid, oop obj, ObjectMonitor** FreeHeadp,
ObjectMonitor** FreeTailp);
static void oops_do(OopClosure* f);
@ -163,6 +167,8 @@ class ObjectSynchronizer : AllStatic {
enum { _BLOCKSIZE = 128 };
static ObjectMonitor* gBlockList;
static ObjectMonitor * volatile gFreeList;
static ObjectMonitor * volatile gOmInUseList; // for moribund thread, so monitors they inflated still get scanned
static int gOmInUseCount;
public:
static void Initialize () ;