[MultiTenant] Added new flag -XX:+TenantDataIsolation

Summary: added new flag -XX:+TenantDataIsolation

Test Plan: jdk/test/multi-tenant

Reviewed-by: yuleil, superajun-wsj

Issue: https://github.com/alibaba/dragonwell8/issues/84

src/share/vm/prims/tenantenv.cpp

@@ -30,6 +30,7 @@
 #define TENANT_FLAG_MULTI_TENANT_ENABLED             (0x1)    // bit 0 to indicate if the tenant feature is enabled.
 #define TENANT_FLAG_HEAP_THROTTLING_ENABLED          (0x2)    // bit 1 to indicate if heap throttling feature is enabled.
 #define TENANT_FLAG_CPU_THROTTLING_ENABLED           (0x4)    // bit 2 to indicate if cpu throttling feature is enabled.
+#define TENANT_FLAG_DATA_ISOLATION_ENABLED           (0x8)    // bit 3 to indicate if data isolation(e.g static vairable isolation) feature is enabled.
 #define TENANT_FLAG_CPU_ACCOUNTING_ENABLED          (0x40)    // bit 6 to indicate if cpu accounting feature is enabled.
 #define TENANT_FLAG_HEAP_ISOLATION_ENABLED          (0x80)    // bit 7 to indicate if heap isolation feature is enabled.
 
@@ -69,5 +70,9 @@ tenant_GetTenantFlags(TenantEnv *env, jclass cls)
     result |= TENANT_FLAG_CPU_ACCOUNTING_ENABLED;
   }
 
+  if (TenantDataIsolation) {
+    result |= TENANT_FLAG_DATA_ISOLATION_ENABLED;
+  }
+
   return result;
 }

src/share/vm/runtime/globals_ext.hpp

@@ -111,7 +111,9 @@
                                                                             \
   product(bool, TenantCpuAccounting, false,                                 \
           "Enable cpu accounting per tenant")                               \
-
+                                                                            \
+  product(bool, TenantDataIsolation, false,                                 \
+          "Enable data isolation(e.g static vairable) per tenant")          \
 
   //add new AJVM specific flags here