--- a/src/os/windows/vm/os_windows.cpp	Wed Mar 09 14:18:12 2016 +0100
+++ b/src/os/windows/vm/os_windows.cpp	Wed Mar 09 11:03:45 2016 -0500
@@ -2186,13 +2186,6 @@
 // Windows Vista/2008 heap corruption check
 #define EXCEPTION_HEAP_CORRUPTION        0xC0000374
 
-#define def_excpt(val) #val, val
-
-struct siglabel {
-  char *name;
-  int   number;
-};
-
 // All Visual C++ exceptions thrown from code generated by the Microsoft Visual
 // C++ compiler contain this error code. Because this is a compiler-generated
 // error, the code is not listed in the Win32 API header files.
@@ -2202,8 +2195,9 @@
 
 #define EXCEPTION_UNCAUGHT_CXX_EXCEPTION    0xE06D7363
 
-
-struct siglabel exceptlabels[] = {
+#define def_excpt(val) { #val, (val) }
+
+static const struct { char* name; uint number; } exceptlabels[] = {
     def_excpt(EXCEPTION_ACCESS_VIOLATION),
     def_excpt(EXCEPTION_DATATYPE_MISALIGNMENT),
     def_excpt(EXCEPTION_BREAKPOINT),
@@ -2228,16 +2222,18 @@
     def_excpt(EXCEPTION_GUARD_PAGE),
     def_excpt(EXCEPTION_INVALID_HANDLE),
     def_excpt(EXCEPTION_UNCAUGHT_CXX_EXCEPTION),
-    def_excpt(EXCEPTION_HEAP_CORRUPTION),
+    def_excpt(EXCEPTION_HEAP_CORRUPTION)
 #ifdef _M_IA64
-    def_excpt(EXCEPTION_REG_NAT_CONSUMPTION),
+    , def_excpt(EXCEPTION_REG_NAT_CONSUMPTION)
 #endif
-    NULL, 0
 };
 
+#undef def_excpt
+
 const char* os::exception_name(int exception_code, char *buf, size_t size) {
-  for (int i = 0; exceptlabels[i].name != NULL; i++) {
-    if (exceptlabels[i].number == exception_code) {
+  uint code = static_cast<uint>(exception_code);
+  for (uint i = 0; i < ARRAY_SIZE(exceptlabels); ++i) {
+    if (exceptlabels[i].number == code) {
       jio_snprintf(buf, size, "%s", exceptlabels[i].name);
       return buf;
     }
@@ -5638,9 +5634,11 @@
   "TERM",       SIGTERM,        // software term signal from kill
   "BREAK",      SIGBREAK,       // Ctrl-Break sequence
   "ILL",        SIGILL};        // illegal instruction
-  for(int i=0;i<sizeof(siglabels)/sizeof(struct siglabel);i++)
-    if(!strcmp(name, siglabels[i].name))
+  for (unsigned i = 0; i < ARRAY_SIZE(siglabels); ++i) {
+    if (strcmp(name, siglabels[i].name) == 0) {
       return siglabels[i].number;
+    }
+  }
   return -1;
 }