RTC to 1.7: fix for hs16 + zero

[Edward Nevill]

Hi folks,

Attached is a fix for building hs16 on zero. As far as I can tell it is broken on all zero platforms, whether or not they build with Shark.

The problem is simply that the function is_allocatable in os_linux_zero.cpp is unimplemeted. Now hs14 did not call this but hs16 does seem to call it.

The 'fix' I have implemented is simply to copy the implementation from os_linux_x86.cpp to os_linux_zero.cpp.

I have tested this with the test_gamma but have not done any further testing as I will have to do a complete rebuild to test it fully.

(it cannot be worse than the current implemetation which just called ShouldNotCallThis()).

Ok to commit?

Regards,
Ed.

--- CUT HERE ---
diff -ruNE old/icedtea6-1.7/ChangeLog new/icedtea6-1.7/ChangeLog
--- old/icedtea6-1.7/ChangeLog	2010-01-15 16:57:45.000000000 +0000
+++ new/icedtea6-1.7/ChangeLog	2010-01-15 17:02:23.000000000 +0000
@@ -1,3 +1,8 @@
+2010-01-15  Edard Nevill <ed at camswl.com>
+
+        * ports/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp
+	Implement is_allocatable to make build word with hs16
+
 2010-01-14  Matthias Klose  <doko at ubuntu.com>
 
 	* Makefile.am (stamps/icedtea-npplugin): New target, add file
diff -ruNE old/icedtea6-1.7/ports/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp new/icedtea6-1.7/ports/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp
--- old/icedtea6-1.7/ports/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	2010-01-15 16:57:47.000000000 +0000
+++ new/icedtea6-1.7/ports/hotspot/src/os_cpu/linux_zero/vm/os_linux_zero.cpp	2010-01-15 16:59:56.000000000 +0000
@@ -249,7 +249,23 @@
 }
 
 bool os::is_allocatable(size_t bytes) {
-  ShouldNotCallThis();
+#ifdef AMD64
+  // unused on amd64?
+  return true;
+#else
+
+  if (bytes < 2 * G) {
+    return true;
+  }
+
+  char* addr = reserve_memory(bytes, NULL);
+
+  if (addr != NULL) {
+    release_memory(addr, bytes);
+  }
+
+  return addr != NULL;
+#endif // AMD64
 }
 
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