some random isolate threading

src/checks.cc

Index: src/checks.cc
diff --git a/src/checks.cc b/src/checks.cc
index 82086824dd2ba6e64cbb8c2339c170e073ab61d7..7108d18892e37efd8b3e80ede0d539f408c74768 100644
--- a/src/checks.cc
+++ b/src/checks.cc
@@ -31,33 +31,19 @@
 
 #include "platform.h"
 
-// TODO(isolates): is it necessary to lift this?
-static int fatal_error_handler_nesting_depth = 0;
-
 // Contains protection against recursive calls (faults while handling faults).
 extern "C" void V8_Fatal(const char* file, int line, const char* format, ...) {
   i::AllowHandleDereference allow_deref;
   i::AllowDeferredHandleDereference allow_deferred_deref;
   fflush(stdout);
   fflush(stderr);
-  fatal_error_handler_nesting_depth++;
-  // First time we try to print an error message
-  if (fatal_error_handler_nesting_depth < 2) {
-    i::OS::PrintError("\n\n#\n# Fatal error in %s, line %d\n# ", file, line);
-    va_list arguments;
-    va_start(arguments, format);
-    i::OS::VPrintError(format, arguments);
-    va_end(arguments);
-    i::OS::PrintError("\n#\n");
-    i::OS::DumpBacktrace();
-  }
-  // First two times we may try to print a stack dump.
-  if (fatal_error_handler_nesting_depth < 3) {
-    if (i::FLAG_stack_trace_on_abort) {
-      // Call this one twice on double fault
-      i::Isolate::Current()->PrintStack(stderr);
-    }
-  }
+  i::OS::PrintError("\n\n#\n# Fatal error in %s, line %d\n# ", file, line);
+  va_list arguments;
+  va_start(arguments, format);
+  i::OS::VPrintError(format, arguments);
+  va_end(arguments);
+  i::OS::PrintError("\n#\n");
+  i::OS::DumpBacktrace();
   i::OS::Abort();
 }