Basic implementation of incremental marking.

src/debug.cc

Index: src/debug.cc
diff --git a/src/debug.cc b/src/debug.cc
index d8201a1894bf79e6bc064d47b9fefcc585251ba1..216afc0ff2da09a01cb23cc5b168905e1d9449d3 100644
--- a/src/debug.cc
+++ b/src/debug.cc
@@ -383,9 +383,9 @@ void BreakLocationIterator::PrepareStepIn() {
     Handle<Code> stub = ComputeCallDebugPrepareStepIn(code->arguments_count(),
                                                       code->kind());
     if (IsDebugBreak()) {
-      original_rinfo()->set_target_address(stub->entry());
+      original_rinfo()->set_target_address(stub->entry(), this->code());
     } else {
-      rinfo()->set_target_address(stub->entry());
+      rinfo()->set_target_address(stub->entry(), this->code());
     }
   } else {
 #ifdef DEBUG
@@ -441,7 +441,7 @@ bool BreakLocationIterator::IsDebugBreak() {
 void BreakLocationIterator::SetDebugBreakAtIC() {
   // Patch the original code with the current address as the current address
   // might have changed by the inline caching since the code was copied.
-  original_rinfo()->set_target_address(rinfo()->target_address());
+  original_rinfo()->set_target_address(rinfo()->target_address(), this->code());
 
   RelocInfo::Mode mode = rmode();
   if (RelocInfo::IsCodeTarget(mode)) {
@@ -451,7 +451,7 @@ void BreakLocationIterator::SetDebugBreakAtIC() {
     // Patch the code to invoke the builtin debug break function matching the
     // calling convention used by the call site.
     Handle<Code> dbgbrk_code(Debug::FindDebugBreak(code, mode));
-    rinfo()->set_target_address(dbgbrk_code->entry());
+    rinfo()->set_target_address(dbgbrk_code->entry(), this->code());
 
     // For stubs that refer back to an inlined version clear the cached map for
     // the inlined case to always go through the IC. As long as the break point
@@ -473,7 +473,7 @@ void BreakLocationIterator::SetDebugBreakAtIC() {
 
 void BreakLocationIterator::ClearDebugBreakAtIC() {
   // Patch the code to the original invoke.
-  rinfo()->set_target_address(original_rinfo()->target_address());
+  rinfo()->set_target_address(original_rinfo()->target_address(), code());
 
   RelocInfo::Mode mode = rmode();
   if (RelocInfo::IsCodeTarget(mode)) {