Remove SafePointBarrier

third_party/WebKit/Source/platform/heap/ThreadState.cpp

Index: third_party/WebKit/Source/platform/heap/ThreadState.cpp
diff --git a/third_party/WebKit/Source/platform/heap/ThreadState.cpp b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
index a41c70bd4385a11c132162fa51d5db9bea8726ba..0dfd5f425bfd10307ffb79cc5400a05ef90ca7a1 100644
--- a/third_party/WebKit/Source/platform/heap/ThreadState.cpp
+++ b/third_party/WebKit/Source/platform/heap/ThreadState.cpp
@@ -1125,6 +1125,17 @@ NO_SANITIZE_ADDRESS static void* adjustScopeMarkerForAdressSanitizer(
 }
 #endif
 
+// TODO(haraken): The first void* pointer is unused. Remove it.

[haraken, 2017/02/17 11:48:52]

I need to update assembly files to fix this.

+using PushAllRegistersCallback = void (*)(void*, ThreadState*, intptr_t*);
+extern "C" void pushAllRegisters(void*, ThreadState*, PushAllRegistersCallback);
+
+static void enterSafePointAfterPushRegisters(void*,
+                                             ThreadState* state,
+                                             intptr_t* stackEnd) {
+  state->recordStackEnd(stackEnd);
+  state->copyStackUntilSafePointScope();
+}
+
 void ThreadState::enterSafePoint(BlinkGC::StackState stackState,
                                  void* scopeMarker) {
   ASSERT(checkThread());
@@ -1136,12 +1147,11 @@ void ThreadState::enterSafePoint(BlinkGC::StackState stackState,
   runScheduledGC(stackState);
   m_stackState = stackState;
   m_safePointScopeMarker = scopeMarker;
-  m_heap->enterSafePoint(this);
+  pushAllRegisters(nullptr, this, enterSafePointAfterPushRegisters);
 }
 
 void ThreadState::leaveSafePoint() {

[haraken, 2017/02/17 11:48:52]

I think I can remove leaveSafePoint() soon.

   ASSERT(checkThread());
-  m_heap->leaveSafePoint();
   m_stackState = BlinkGC::HeapPointersOnStack;
   clearSafePointScopeMarker();
 }