Fix for gdbjit.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index 2378a5e0a4e0690ab99a5701125bc9d331d846c4..2b26236162188b3a700d44e996f76a82d3b6fe42 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -483,15 +483,16 @@ void MarkCompactCollector::Prepare(GCTracer* tracer) {
   ASSERT(!FLAG_always_compact || !FLAG_never_compact);
 
   if (collect_maps_) CreateBackPointers();
+  bool gdbjit = false;
 #ifdef ENABLE_GDB_JIT_INTERFACE
   if (FLAG_gdbjit) {
     // If GDBJIT interface is active disable compaction.
-    compacting_collection_ = false;
+    gdbjit = true;

[Vyacheslav Egorov (Chromium), 2011/09/23 09:27:55]

lets instead do 

never_compact = true;
sweep_precise_ = true; 

here.

   }
 #endif
 
   // Clear marking bits for precise sweeping to collect all garbage.
-  if (was_marked_incrementally_ && PreciseSweepingRequired()) {
+  if ((was_marked_incrementally_ && PreciseSweepingRequired()) || gdbjit) {
     heap()->incremental_marking()->Abort();
     ClearMarkbits(heap_);
     AbortCompaction();