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6610420: Debug VM crashes during monitor lock rank checking

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Make SerializePage lock as raw lock and add name for mutex locks

Reviewed-by: never, dice, dholmes
This commit is contained in:
Xiaobin Lu 2008-02-05 23:21:57 -08:00
parent f7eb451719
commit f804a7e9f9
5 changed files with 24 additions and 24 deletions
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8
hotspot/src/share/vm/runtime/mutex.hpp
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@ -82,6 +82,9 @@ class ParkEvent ;
// *in that order*. If their implementations change such that these
// assumptions are violated, a whole lot of code will break.
// The default length of monitor name is choosen to be 64 to avoid false sharing.
static const int MONITOR_NAME_LEN = 64;
class Monitor : public CHeapObj {
public:
@ -126,9 +129,8 @@ class Monitor : public CHeapObj {
volatile intptr_t _WaitLock [1] ; // Protects _WaitSet
ParkEvent * volatile _WaitSet ; // LL of ParkEvents
volatile bool _snuck; // Used for sneaky locking (evil).
const char * _name; // Name of mutex
int NotifyCount ; // diagnostic assist
double pad [8] ; // avoid false sharing
char _name[MONITOR_NAME_LEN]; // Name of mutex
// Debugging fields for naming, deadlock detection, etc. (some only used in debug mode)
#ifndef PRODUCT
@ -170,7 +172,7 @@ class Monitor : public CHeapObj {
int ILocked () ;
protected:
static void ClearMonitor (Monitor * m) ;
static void ClearMonitor (Monitor * m, const char* name = NULL) ;
Monitor() ;
public: