Add a flag for aborting on stack overflow.

This is useful for correctness fuzzing where different compilers might
overflow the stack in different points.

Review-Url: https://codereview.chromium.org/2381773003
Cr-Commit-Position: refs/heads/master@{#39862}

src/flag-definitions.h

@@ -868,6 +868,10 @@ DEFINE_BOOL(stack_trace_on_illegal, false,
             "print stack trace when an illegal exception is thrown")
 DEFINE_BOOL(abort_on_uncaught_exception, false,
             "abort program (dump core) when an uncaught exception is thrown")
+DEFINE_BOOL(abort_on_stack_overflow, false,
+            "Abort program when stack overflow (as opposed to throwing "
+            "RangeError). This is useful for fuzzing where the spec behaviour "
+            "would introduce nondeterminism.")
 DEFINE_BOOL(randomize_hashes, true,
             "randomize hashes to avoid predictable hash collisions "
             "(with snapshots this option cannot override the baked-in seed)")

src/isolate.cc

@@ -925,6 +925,10 @@ bool Isolate::MayAccess(Handle<Context> accessing_context,
 
 
 Object* Isolate::StackOverflow() {
+  if (FLAG_abort_on_stack_overflow) {
+    FATAL("Aborting on stack overflow");
+  }
+
   DisallowJavascriptExecution no_js(this);
   HandleScope scope(this);