[wasm] Initial signal handler

include/v8.h

Index: include/v8.h
diff --git a/include/v8.h b/include/v8.h
index 3d8082ee1415f7a5ff41f4b059cce528bf22c381..c9ad5db4392afe7f0fa3aae90760946abe30563f 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -7578,6 +7578,17 @@ class V8_EXPORT V8 {
    */
   static void ShutdownPlatform();
 
+  /**
+   * Given the V8 signal handler a chance to handle a fault.
+   */
+  static bool MaybeHandleFault(int signum, void* info, void* context);

[titzer, 2017/01/09 09:26:56]

Trying to think of a better name here...MaybeHandleFault reads a little funny. I
thought of "TryHandleFault", but that might be confusing as well. Other ideas?

[Eric Holk, 2017/01/10 23:10:48]

Yeah, Maybe seems a little noncommittal. I feel like what we really want is
HandleFaultIfYouWantTo, but that's far worse. I'll go with Try for now, because
that at least has some precedent.

+
+  /**
+   * Enable the default signal handler rather than using one provided by the
+   * embedder.
+   */
+  static bool RegisterDefaultSignalHandler();
+
  private:
   V8();