Add a new API V8::SetJitCodeEventHandler to push code name and location to users such as profilers.

src/mark-compact.cc

Index: src/mark-compact.cc
diff --git a/src/mark-compact.cc b/src/mark-compact.cc
index a62196e3806df1a16cee82a702333f0ea8dcc5ae..39efd2529959d7f4bf1bac5e236488788d9ab5b6 100644
--- a/src/mark-compact.cc
+++ b/src/mark-compact.cc
@@ -27,11 +27,11 @@
 
 #include "v8.h"
 
+#include "code-events.h"
 #include "code-stubs.h"
 #include "compilation-cache.h"
 #include "deoptimizer.h"
 #include "execution.h"
-#include "gdb-jit.h"
 #include "global-handles.h"
 #include "heap-profiler.h"
 #include "ic-inl.h"
@@ -689,7 +689,8 @@ void MarkCompactCollector::Prepare(GCTracer* tracer) {
 #ifdef ENABLE_GDB_JIT_INTERFACE
   if (FLAG_gdbjit) {
     // If GDBJIT interface is active disable compaction.
-    compacting_collection_ = false;
+    // DO NOT SUBMIT.

[danno, 2012/07/25 13:50:42]

Is this left-over debug code?

[Sigurður Ásgeirsson, 2012/07/25 14:38:35]

This and the other crud was my initial attempt at trying to compiler under
ENABLE_GDB_JIT_INTERFACE.

+    FLAG_never_compact = true;
   }
 #endif
 
@@ -2822,6 +2823,7 @@ void MarkCompactCollector::MigrateObject(Address dst,
     }
   } else if (dest == CODE_SPACE) {
     PROFILE(heap()->isolate(), CodeMoveEvent(src, dst));
+    JIT_CODE_EVENT(MoveCode(src, dst));
     heap()->MoveBlock(dst, src, size);
     SlotsBuffer::AddTo(&slots_buffer_allocator_,
                        &migration_slots_buffer_,
@@ -4129,13 +4131,9 @@ void MarkCompactCollector::EnableCodeFlushing(bool enable) {
 // code objects. We should either reenable it or change our tools.
 void MarkCompactCollector::ReportDeleteIfNeeded(HeapObject* obj,
                                                 Isolate* isolate) {
-#ifdef ENABLE_GDB_JIT_INTERFACE
-  if (obj->IsCode()) {
-    GDBJITInterface::RemoveCode(reinterpret_cast<Code*>(obj));
-  }
-#endif
   if (obj->IsCode()) {
     PROFILE(isolate, CodeDeleteEvent(obj->address()));
+    JIT_CODE_EVENT(RemoveCode(reinterpret_cast<Code*>(obj)));
   }
 }