8143291: Remove redundant coding around os::exception_name

Reviewed-by: dholmes, coleenp

hotspot/src/os/windows/vm/os_windows.cpp

@@ -6033,3 +6033,36 @@ void TestReserveMemorySpecial_test() {
   UseNUMAInterleaving = old_use_numa_interleaving;
 }
 #endif // PRODUCT
+
+/*
+  All the defined signal names for Windows.
+
+  NOTE that not all of these names are accepted by FindSignal!
+
+  For various reasons some of these may be rejected at runtime.
+
+  Here are the names currently accepted by a user of sun.misc.Signal with
+  1.4.1 (ignoring potential interaction with use of chaining, etc):
+
+     (LIST TBD)
+
+*/
+int os::get_signal_number(const char* name) {
+  static const struct {
+    char* name;
+    int   number;
+  } siglabels [] =
+    // derived from version 6.0 VC98/include/signal.h
+  {"ABRT",      SIGABRT,        // abnormal termination triggered by abort cl
+  "FPE",        SIGFPE,         // floating point exception
+  "SEGV",       SIGSEGV,        // segment violation
+  "INT",        SIGINT,         // interrupt
+  "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))
+      return siglabels[i].number;
+  return -1;
+}
+