src/os/linux/vm/perfMemory_linux.cpp

rev 1916 : 7007769: VM crashes with SIGBUS writing PerfData if tmp space is full
Summary: Fill perfdata file with zeros to verify available disk space
Reviewed-by: coleenp, kamg

*** 633,643 ****
--- 633,665 ----
      }
      RESTARTABLE(::close(fd), result);
      return -1;
    }
  
+   // Verify that we have enough disk space for this file.
+   // We'll get random SIGBUS crashes on memory accesses if
+   // we don't.
+ 
+   for (size_t seekpos = 0; seekpos < size; seekpos += os::vm_page_size()) {
+     int zero_int = 0;
+     result = (int)os::seek_to_file_offset(fd, (jlong)(seekpos));
+     if (result == -1 ) break;
+     RESTARTABLE(::write(fd, &zero_int, 1), result);
+     if (result != 1) {
+       if (errno == ENOSPC) {
+         warning("Insufficient space for shared memory file:\n   %s\nTry using the -Djava.io.tmpdir= option to select an alternate temp location.\n", filename);
+       }
+       break;
+     }
+   }
+ 
+   if (result != -1) {
      return fd;
+   } else {
+     RESTARTABLE(::close(fd), result);
+     return -1;
+   }
  }
  
  // open the shared memory file for the given user and vmid. returns
  // the file descriptor for the open file or -1 if the file could not
  // be opened.