--- a/hotspot/src/os/windows/vm/os_windows.cpp	Mon Mar 23 10:42:20 2009 -0400
+++ b/hotspot/src/os/windows/vm/os_windows.cpp	Wed Mar 25 14:19:20 2009 -0400
@@ -2189,7 +2189,8 @@
           if (addr > thread->stack_yellow_zone_base() && addr < thread->stack_base() ) {
                   addr = (address)((uintptr_t)addr &
                          (~((uintptr_t)os::vm_page_size() - (uintptr_t)1)));
-                  os::commit_memory( (char *)addr, thread->stack_base() - addr );
+                  os::commit_memory((char *)addr, thread->stack_base() - addr,
+                                    false );
                   return EXCEPTION_CONTINUE_EXECUTION;
           }
           else
@@ -2565,8 +2566,7 @@
   assert((size_t)addr % os::vm_allocation_granularity() == 0,
          "reserve alignment");
   assert(bytes % os::vm_allocation_granularity() == 0, "reserve block size");
-  char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE,
-                                  PAGE_EXECUTE_READWRITE);
+  char* res = (char*)VirtualAlloc(addr, bytes, MEM_RESERVE, PAGE_READWRITE);
   assert(res == NULL || addr == NULL || addr == res,
          "Unexpected address from reserve.");
   return res;
@@ -2595,7 +2595,7 @@
   return true;
 }
 
-char* os::reserve_memory_special(size_t bytes, char* addr) {
+char* os::reserve_memory_special(size_t bytes, char* addr, bool exec) {
 
   if (UseLargePagesIndividualAllocation) {
     if (TracePageSizes && Verbose) {
@@ -2618,7 +2618,7 @@
     p_buf = (char *) VirtualAlloc(addr,
                                  size_of_reserve,  // size of Reserve
                                  MEM_RESERVE,
-                                 PAGE_EXECUTE_READWRITE);
+                                 PAGE_READWRITE);
     // If reservation failed, return NULL
     if (p_buf == NULL) return NULL;
 
@@ -2659,7 +2659,13 @@
         p_new = (char *) VirtualAlloc(next_alloc_addr,
                                     bytes_to_rq,
                                     MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES,
-                                    PAGE_EXECUTE_READWRITE);
+                                    PAGE_READWRITE);
+        if (p_new != NULL && exec) {
+          DWORD oldprot;
+          // Windows doc says to use VirtualProtect to get execute permissions
+          VirtualProtect(next_alloc_addr, bytes_to_rq,
+                         PAGE_EXECUTE_READWRITE, &oldprot);
+        }
       }
 
       if (p_new == NULL) {
@@ -2688,10 +2694,12 @@
   } else {
     // normal policy just allocate it all at once
     DWORD flag = MEM_RESERVE | MEM_COMMIT | MEM_LARGE_PAGES;
-    char * res = (char *)VirtualAlloc(NULL,
-                                      bytes,
-                                      flag,
-                                      PAGE_EXECUTE_READWRITE);
+    char * res = (char *)VirtualAlloc(NULL, bytes, flag, PAGE_READWRITE);
+    if (res != NULL && exec) {
+      DWORD oldprot;
+      // Windows doc says to use VirtualProtect to get execute permissions
+      VirtualProtect(res, bytes, PAGE_EXECUTE_READWRITE, &oldprot);
+    }
     return res;
   }
 }
@@ -2703,7 +2711,7 @@
 void os::print_statistics() {
 }
 
-bool os::commit_memory(char* addr, size_t bytes) {
+bool os::commit_memory(char* addr, size_t bytes, bool exec) {
   if (bytes == 0) {
     // Don't bother the OS with noops.
     return true;
@@ -2712,11 +2720,19 @@
   assert(bytes % os::vm_page_size() == 0, "commit in page-sized chunks");
   // Don't attempt to print anything if the OS call fails. We're
   // probably low on resources, so the print itself may cause crashes.
-  return VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_EXECUTE_READWRITE) != NULL;
+  bool result = VirtualAlloc(addr, bytes, MEM_COMMIT, PAGE_READWRITE) != 0;
+  if (result != NULL && exec) {
+    DWORD oldprot;
+    // Windows doc says to use VirtualProtect to get execute permissions
+    return VirtualProtect(addr, bytes, PAGE_EXECUTE_READWRITE, &oldprot) != 0;
+  } else {
+    return result;
+  }
 }
 
-bool os::commit_memory(char* addr, size_t size, size_t alignment_hint) {
-  return commit_memory(addr, size);
+bool os::commit_memory(char* addr, size_t size, size_t alignment_hint,
+                       bool exec) {
+  return commit_memory(addr, size, exec);
 }
 
 bool os::uncommit_memory(char* addr, size_t bytes) {
@@ -2750,7 +2766,7 @@
 
   // Strange enough, but on Win32 one can change protection only for committed
   // memory, not a big deal anyway, as bytes less or equal than 64K
-  if (!is_committed && !commit_memory(addr, bytes)) {
+  if (!is_committed && !commit_memory(addr, bytes, prot == MEM_PROT_RWX)) {
     fatal("cannot commit protection page");
   }
   // One cannot use os::guard_memory() here, as on Win32 guard page
@@ -3248,10 +3264,10 @@
 #endif
 
   if (!UseMembar) {
-    address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_EXECUTE_READWRITE);
+    address mem_serialize_page = (address)VirtualAlloc(NULL, os::vm_page_size(), MEM_RESERVE, PAGE_READWRITE);
     guarantee( mem_serialize_page != NULL, "Reserve Failed for memory serialize page");
 
-    return_page  = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_EXECUTE_READWRITE);
+    return_page  = (address)VirtualAlloc(mem_serialize_page, os::vm_page_size(), MEM_COMMIT, PAGE_READWRITE);
     guarantee( return_page != NULL, "Commit Failed for memory serialize page");
 
     os::set_memory_serialize_page( mem_serialize_page );