# HG changeset patch
# User goetz
# Date 1422475155 -3600
# Node ID 221d6229668c7dc221dc61ac82b7268143ffa377
# Parent  b59d6dde575bdfa29eb6a7b2fcd5812717270995
8071822: [TEST_BUG] Adapt collectorPolicy internal tests to support 64K pages

diff --git a/src/share/vm/memory/collectorPolicy.cpp b/src/share/vm/memory/collectorPolicy.cpp
--- a/src/share/vm/memory/collectorPolicy.cpp
+++ b/src/share/vm/memory/collectorPolicy.cpp
@@ -965,32 +965,43 @@
   }
 
   static void test_old_size() {
-      size_t flag_value;
+    size_t flag_value;
 
-      save_flags();
+    save_flags();
 
-      // If OldSize is set on the command line, it should be used
-      // for both min and initial old size if less than min heap.
-      flag_value = 20 * M;
-      set_basic_flag_values();
-      FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
-      verify_old_min(flag_value);
+    // If OldSize is set on the command line, it should be used
+    // for both min and initial old size if less than min heap.
+    flag_value = 20 * M;
+    set_basic_flag_values();
+    FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
+    verify_old_min(flag_value);
 
-      set_basic_flag_values();
-      FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
-      verify_old_initial(flag_value);
+    // In case of large alignment due to 64K page size, some sizes are
+    // increased. Remember the result from verify_old_min for the
+    // next test.
+    size_t adapted_MaxHeapSize      = MaxHeapSize;
+    size_t adapted_InitialHeapSize  = InitialHeapSize;
 
-      // If MaxNewSize is large, the maximum OldSize will be less than
-      // what's requested on the command line and it should be reset
-      // ergonomically.
-      flag_value = 30 * M;
-      set_basic_flag_values();
-      FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
-      FLAG_SET_CMDLINE(uintx, MaxNewSize, 170*M);
-      // Calculate what we expect the flag to be.
-      flag_value = MaxHeapSize - MaxNewSize;
-      verify_old_initial(flag_value);
+    set_basic_flag_values();
+    FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
+    // Calculate what we expect the flag to be.
+    flag_value = adapted_InitialHeapSize - MaxNewSize;
+    verify_old_initial(flag_value);
 
+    // If MaxNewSize is large, the maximum OldSize will be less than
+    // what's requested on the command line and it should be reset
+    // ergonomically.
+    // We intentionally set MaxNewSize + OldSize > MaxHeapSize.
+    set_basic_flag_values();
+    flag_value = 30 * M;
+    FLAG_SET_CMDLINE(uintx, OldSize, flag_value);
+    size_t new_size_value = adapted_MaxHeapSize - flag_value + 20*M;
+    FLAG_SET_CMDLINE(uintx, MaxNewSize, new_size_value);
+    // Calculate what we expect the flag to be.
+    flag_value = adapted_MaxHeapSize - MaxNewSize;
+    verify_old_initial(flag_value);
+
+    restore_flags();
   }
 
   static void verify_young_min(size_t expected) {
@@ -1011,6 +1022,12 @@
     MarkSweepPolicy msp;
     msp.initialize_all();
 
+    if (InitialHeapSize > initial_heap_size) {
+      // InitialHeapSize was adapted by msp.initialize_all, e.g. due to alignment
+      // caused by 64K page size.
+      initial_heap_size = InitialHeapSize;
+    }
+
     size_t expected = msp.scale_by_NewRatio_aligned(initial_heap_size);
     assert(msp.initial_young_size() == expected, err_msg("%zu != %zu", msp.initial_young_size(), expected));
     assert(FLAG_IS_ERGO(NewSize) && NewSize == expected,