src/hotspot/cpu/x86/globals_x86.hpp

rev 57595 : v2.09a with 8235795, 8235931 and 8236035 extracted; rebased to jdk-14+28; merge with 8236035.patch.cr1; merge with 8235795.patch.cr1; merge with 8236035.patch.cr2; merge with 8235795.patch.cr2; merge with 8235795.patch.cr3.

*** 87,96 ****
--- 87,111 ----
  
  define_pd_global(bool, PreserveFramePointer, false);
  
  define_pd_global(intx, InitArrayShortSize, 8*BytesPerLong);
  
+ #if defined(_LP64) || defined(_WINDOWS)
+ // ObjectMonitor ref_count is implemented in LP64 C2 fast_lock()
+ // and fast_unlock() so we don't need the handshake by default.
+ #ifdef _LP64
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, false);
+ #else
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
+ #endif
+ #else
+ // ObjectMonitor ref_count not implemented in C2 fast_lock() or
+ // fast_unlock() so use a handshake for safety.
+ // Will use a safepoint instead of a handshake on this platform.
+ define_pd_global(bool, HandshakeAfterDeflateIdleMonitors, true);
+ #endif
+ 
  #define ARCH_FLAGS(develop, \
                     product, \
                     diagnostic, \
                     experimental, \
                     notproduct, \