Implement -Xss.

* include/jvm.h (gcj::stack_size): Declare.
        (_Jv_StackSize): Declare.
        * posix-threads.cc (_Jv_InitThreads): Validate gcj::stack_size.
        (_Jv_ThreadStart): Set stack size if specified.
        * prims.cc (gcj::stack_size): Define.
        (parse_memory_size): Renamed from parse_heap_size.
        (_Jv_SetStackSize): Parse stack size argument and set
        gcj::stack_size.

From-SVN: r107132

libjava/include/jvm.h

@@ -233,6 +233,9 @@ namespace gcj
   
   /* When true, enable the bytecode verifier and BC-ABI verification. */
   extern bool verifyClasses;
+
+  /* Thread stack size specified by the -Xss runtime argument. */
+  extern size_t stack_size;
 }
 
 // This class handles all aspects of class preparation and linking.
@@ -363,6 +366,10 @@ void _Jv_SetMaximumHeapSize (const char *arg);
    during thread deregistration.  */
 void _Jv_FreeMethodCache ();
 
+/* Set the stack size for threads.  Parses ARG, a number which can 
+   optionally have "k" or "m" appended.  */
+void _Jv_SetStackSize (const char *arg);
+
 extern "C" void JvRunMain (jclass klass, int argc, const char **argv);
 void _Jv_RunMain (jclass klass, const char *name, int argc, const char **argv, 
 		  bool is_jar);