Make IC patching resilient to flushing of the original target() ic.

src/objects.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 8786 matching lines @@
 
 void Code::FindAllCode(CodeHandleList* code_list, int length) {
   ASSERT(is_inline_cache_stub());
   AssertNoAllocation no_allocation;
   int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET);
   int i = 0;
   for (RelocIterator it(this, mask); !it.done(); it.next()) {
     if (i++ == length) return;
     RelocInfo* info = it.rinfo();
     Code* code = Code::GetCodeFromTargetAddress(info->target_address());
-    ASSERT(code->is_load_stub());
+    ASSERT(code->kind() == Code::STUB);
     code_list->Add(Handle<Code>(code));
   }
   UNREACHABLE();
 }
 
 
 void Code::ClearInlineCaches() {
   int mask = RelocInfo::ModeMask(RelocInfo::CODE_TARGET) |
              RelocInfo::ModeMask(RelocInfo::CONSTRUCT_CALL) |
              RelocInfo::ModeMask(RelocInfo::CODE_TARGET_WITH_ID) |
@@ skipping 5278 matching lines @@
   set_year(Smi::FromInt(year), SKIP_WRITE_BARRIER);
   set_month(Smi::FromInt(month), SKIP_WRITE_BARRIER);
   set_day(Smi::FromInt(day), SKIP_WRITE_BARRIER);
   set_weekday(Smi::FromInt(weekday), SKIP_WRITE_BARRIER);
   set_hour(Smi::FromInt(hour), SKIP_WRITE_BARRIER);
   set_min(Smi::FromInt(min), SKIP_WRITE_BARRIER);
   set_sec(Smi::FromInt(sec), SKIP_WRITE_BARRIER);
 }
 
 } }  // namespace v8::internal