diff -r 06b1faf0df9c -r aab592fd4f44 hotspot/src/share/vm/compiler/compileBroker.cpp
--- a/hotspot/src/share/vm/compiler/compileBroker.cpp	Fri Mar 26 11:10:26 2010 -0400
+++ b/hotspot/src/share/vm/compiler/compileBroker.cpp	Wed Mar 31 16:51:18 2010 -0700
@@ -1414,9 +1414,14 @@
     intx thread_id = os::current_thread_id();
     for (int try_temp_dir = 1; try_temp_dir >= 0; try_temp_dir--) {
       const char* dir = (try_temp_dir ? os::get_temp_directory() : NULL);
-      if (dir == NULL)  dir = "";
-      sprintf(fileBuf, "%shs_c" UINTX_FORMAT "_pid%u.log",
-              dir, thread_id, os::current_process_id());
+      if (dir == NULL) {
+        jio_snprintf(fileBuf, sizeof(fileBuf), "hs_c" UINTX_FORMAT "_pid%u.log",
+                     thread_id, os::current_process_id());
+      } else {
+        jio_snprintf(fileBuf, sizeof(fileBuf),
+                     "%s%shs_c" UINTX_FORMAT "_pid%u.log", dir,
+                     os::file_separator(), thread_id, os::current_process_id());
+      }
       fp = fopen(fileBuf, "at");
       if (fp != NULL) {
         file = NEW_C_HEAP_ARRAY(char, strlen(fileBuf)+1);