--- a/src/share/vm/prims/jniCheck.cpp	Fri Oct 04 13:01:07 2013 +0200
+++ b/src/share/vm/prims/jniCheck.cpp	Sat Oct 05 15:18:57 2013 +0200
@@ -1324,18 +1324,19 @@
     IN_VM(
       checkString(thr, str);
     )
+    jchar* newResult = NULL;
     const jchar *result = UNCHECKED()->GetStringChars(env,str,isCopy);
     assert (isCopy == NULL || *isCopy == JNI_TRUE, "GetStringChars didn't return a copy as expected");
-
-    size_t len = UNCHECKED()->GetStringLength(env,str) + 1; // + 1 for NULL termination
-    jint* tagLocation = (jint*) AllocateHeap(len * sizeof(jchar) + sizeof(jint), mtInternal);
-    *tagLocation = STRING_TAG;
-    jchar* newResult = (jchar*) (tagLocation + 1);
-    memcpy(newResult, result, len * sizeof(jchar));
-    // Avoiding call to UNCHECKED()->ReleaseStringChars() since that will fire unexpected dtrace probes
-    // Note that the dtrace arguments for the allocated memory will not match up with this solution.
-    FreeHeap((char*)result);
-
+    if (result != NULL) {
+      size_t len = UNCHECKED()->GetStringLength(env,str) + 1; // + 1 for NULL termination
+      jint* tagLocation = (jint*) AllocateHeap(len * sizeof(jchar) + sizeof(jint), mtInternal);
+      *tagLocation = STRING_TAG;
+      newResult = (jchar*) (tagLocation + 1);
+      memcpy(newResult, result, len * sizeof(jchar));
+      // Avoiding call to UNCHECKED()->ReleaseStringChars() since that will fire unexpected dtrace probes
+      // Note that the dtrace arguments for the allocated memory will not match up with this solution.
+      FreeHeap((char*)result);
+    }
     functionExit(env);
     return newResult;
 JNI_END
@@ -1394,18 +1395,19 @@
     IN_VM(
       checkString(thr, str);
     )
+    char* newResult = NULL;
     const char *result = UNCHECKED()->GetStringUTFChars(env,str,isCopy);
     assert (isCopy == NULL || *isCopy == JNI_TRUE, "GetStringUTFChars didn't return a copy as expected");
-
-    size_t len = strlen(result) + 1; // + 1 for NULL termination
-    jint* tagLocation = (jint*) AllocateHeap(len + sizeof(jint), mtInternal);
-    *tagLocation = STRING_UTF_TAG;
-    char* newResult = (char*) (tagLocation + 1);
-    strcpy(newResult, result);
-    // Avoiding call to UNCHECKED()->ReleaseStringUTFChars() since that will fire unexpected dtrace probes
-    // Note that the dtrace arguments for the allocated memory will not match up with this solution.
-    FreeHeap((char*)result, mtInternal);
-
+    if (result != NULL) {
+      size_t len = strlen(result) + 1; // + 1 for NULL termination
+      jint* tagLocation = (jint*) AllocateHeap(len + sizeof(jint), mtInternal);
+      *tagLocation = STRING_UTF_TAG;
+      newResult = (char*) (tagLocation + 1);
+      strcpy(newResult, result);
+      // Avoiding call to UNCHECKED()->ReleaseStringUTFChars() since that will fire unexpected dtrace probes
+      // Note that the dtrace arguments for the allocated memory will not match up with this solution.
+      FreeHeap((char*)result, mtInternal);
+    }
     functionExit(env);
     return newResult;
 JNI_END