--- old/src/os/bsd/vm/os_bsd.cpp	2014-12-10 22:33:52.106284501 +0900
+++ new/src/os/bsd/vm/os_bsd.cpp	2014-12-10 22:33:51.850284503 +0900
@@ -4673,7 +4673,7 @@
 // Get the default path to the core file
 // Returns the length of the string
 int os::get_core_path(char* buffer, size_t bufferSize) {
-  int n = jio_snprintf(buffer, bufferSize, "/cores");
+  int n = jio_snprintf(buffer, bufferSize, "/cores/core.%d", current_process_id());
 
   // Truncate if theoretical string was longer than bufferSize
   n = MIN2(n, (int)bufferSize);