908   // but ignore other failures
 909   result = ::close(fd);
 910   assert(result != OS_ERR, "could not close file");
 911 
 912   if (mapAddress == MAP_FAILED) {
 913     if (PrintMiscellaneous && Verbose) {
 914       warning("mmap failed: %s\n", strerror(errno));
 915     }
 916     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
 917               "Could not map PerfMemory");
 918   }
 919 
 920   // it does not go through os api, the operation has to record from here
 921   MemTracker::record_virtual_memory_reserve((address)mapAddress, size, mtInternal, CURRENT_PC);
 922 
 923   *addr = mapAddress;
 924   *sizep = size;
 925 
 926   if (PerfTraceMemOps) {
 927     tty->print("mapped " SIZE_FORMAT " bytes for vmid %d at "
 928                INTPTR_FORMAT "\n", size, vmid, (void*)mapAddress);
 929   }
 930 }
 931 
 932 
 933 
 934 
 935 // create the PerfData memory region
 936 //
 937 // This method creates the memory region used to store performance
 938 // data for the JVM. The memory may be created in standard or
 939 // shared memory.
 940 //
 941 void PerfMemory::create_memory_region(size_t size) {
 942 
 943   if (PerfDisableSharedMem) {
 944     // do not share the memory for the performance data.
 945     _start = create_standard_memory(size);
 946   }
 947   else {
 948     _start = create_shared_memory(size);

 908   // but ignore other failures
 909   result = ::close(fd);
 910   assert(result != OS_ERR, "could not close file");
 911 
 912   if (mapAddress == MAP_FAILED) {
 913     if (PrintMiscellaneous && Verbose) {
 914       warning("mmap failed: %s\n", strerror(errno));
 915     }
 916     THROW_MSG(vmSymbols::java_lang_OutOfMemoryError(),
 917               "Could not map PerfMemory");
 918   }
 919 
 920   // it does not go through os api, the operation has to record from here
 921   MemTracker::record_virtual_memory_reserve((address)mapAddress, size, mtInternal, CURRENT_PC);
 922 
 923   *addr = mapAddress;
 924   *sizep = size;
 925 
 926   if (PerfTraceMemOps) {
 927     tty->print("mapped " SIZE_FORMAT " bytes for vmid %d at "
 928                INTPTR_FORMAT "\n", size, vmid, p2i((void*)mapAddress));
 929   }
 930 }
 931 
 932 
 933 
 934 
 935 // create the PerfData memory region
 936 //
 937 // This method creates the memory region used to store performance
 938 // data for the JVM. The memory may be created in standard or
 939 // shared memory.
 940 //
 941 void PerfMemory::create_memory_region(size_t size) {
 942 
 943   if (PerfDisableSharedMem) {
 944     // do not share the memory for the performance data.
 945     _start = create_standard_memory(size);
 946   }
 947   else {
 948     _start = create_shared_memory(size);