--- old/./src/os/linux/vm/os_linux.cpp	2010-07-27 16:56:31.000000000 +0200
+++ new/./src/os/linux/vm/os_linux.cpp	2010-07-27 16:56:30.000000000 +0200
@@ -3845,6 +3845,11 @@
 {
   Linux::fast_thread_clock_init();
 
+  if (StackShadowPages <= 0) {
+    tty->print_cr("\nThe -XX:StackShadowPages parameter must be set to positive value!");
+    return JNI_ERR;
+  }
+
   // Allocate a single page and mark it as readable for safepoint polling
   address polling_page = (address) ::mmap(NULL, Linux::page_size(), PROT_READ, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
   guarantee( polling_page != MAP_FAILED, "os::init_2: failed to allocate polling page" );
--- old/./src/os/solaris/vm/os_solaris.cpp	2010-07-27 16:56:31.000000000 +0200
+++ new/./src/os/solaris/vm/os_solaris.cpp	2010-07-27 16:56:31.000000000 +0200
@@ -4859,6 +4859,10 @@
 }
 
   FLAG_SET_DEFAULT(UseLargePages, os::large_page_init());
+  if (StackShadowPages <= 0) {
+    tty->print_cr("\nThe -XX:StackShadowPages parameter must be set to positive value!");
+    return JNI_ERR;
+  }
 
   // Check minimum allowable stack size for thread creation and to initialize
   // the java system classes, including StackOverflowError - depends on page