New flag --stress-compaction

src/mark-compact.cc

Index: src/mark-compact.cc
===================================================================
--- src/mark-compact.cc	(revision 9579)
+++ src/mark-compact.cc	(working copy)
@@ -430,10 +430,18 @@
 
   PageIterator it(space);
   int count = 0;
-  if (it.has_next()) it.next();  // Never compact the first page.
+  if (it.has_next()) it.next();  // Never compact the first page.A

[Vyacheslav Egorov (Chromium), 2011/10/11 13:55:29]

accidental edit

   while (it.has_next()) {
     Page* p = it.next();
-    if (space->IsFragmented(p)) {
+    bool evacuate = false;
+    if (FLAG_stress_compaction) {
+      int counter = space->heap()->ms_count();
+      uintptr_t page_number = reinterpret_cast<uintptr_t>(p) >> kPageSizeBits;
+      if ((counter & 1) == (page_number & 1)) evacuate = true;
+    } else {
+      if (space->IsFragmented(p)) evacuate = true;
+    }
+    if (evacuate) {
       AddEvacuationCandidate(p);
       count++;
     } else {