diff -r 74805fccc6ae -r 19219ec3f176 src/hotspot/os/windows/os_windows.cpp
--- a/src/hotspot/os/windows/os_windows.cpp	Thu Oct 19 14:36:40 2017 +0200
+++ b/src/hotspot/os/windows/os_windows.cpp	Wed Sep 20 15:12:11 2017 +0200
@@ -74,6 +74,7 @@
 #include "utilities/growableArray.hpp"
 #include "utilities/macros.hpp"
 #include "utilities/vmError.hpp"
+#include "symbolengine.hpp"
 #include "windbghelp.hpp"
 
 
@@ -134,6 +135,8 @@
     if (ForceTimeHighResolution) {
       timeBeginPeriod(1L);
     }
+    WindowsDbgHelp::pre_initialize();
+    SymbolEngine::pre_initialize();
     break;
   case DLL_PROCESS_DETACH:
     if (ForceTimeHighResolution) {
@@ -1319,6 +1322,8 @@
 void * os::dll_load(const char *name, char *ebuf, int ebuflen) {
   void * result = LoadLibrary(name);
   if (result != NULL) {
+    // Recalculate pdb search path if a DLL was loaded successfully.
+    SymbolEngine::recalc_search_path();
     return result;
   }
 
@@ -4032,6 +4037,8 @@
     return JNI_ERR;
   }
 
+  SymbolEngine::recalc_search_path();
+
   return JNI_OK;
 }