fixup! async_hooks: add trackPromises option to createHook()

Author: joyeecheung

tools/doc/type-parser.mjs

@@ -66,7 +66,7 @@ const customTypesMap = {
 
   'AsyncLocalStorage': 'async_context.html#class-asynclocalstorage',
 
-  'AsyncHook': 'async_hooks.html#async_hookscreatehookcallbacks',
+  'AsyncHook': 'async_hooks.html#async_hookscreatehookoptions',
   'AsyncResource': 'async_hooks.html#class-asyncresource',
 
   'brotli options': 'zlib.html#class-brotlioptions',

tools/gdbinit

@@ -0,0 +1,52 @@
+# Add a simple unwinder which, on x64, walks frame pointers when there
+# is no source information available.
+
+python
+
+from gdb.unwinder import Unwinder
+
+class V8UnwinderFrameId(object):
+  def __init__(self, sp, pc):
+    self.sp = sp
+    self.pc = pc
+
+class V8Unwinder(Unwinder):
+  def __init__(self):
+    super(V8Unwinder, self).__init__("V8Unwinder")
+    self.enabled = True
+
+  def __call__(self, pending_frame):
+    try:
+      # Only supported on x64.
+      if gdb.selected_inferior().architecture().name() != "i386:x86-64":
+        return None
+
+      pc = pending_frame.read_register("rip")
+      sym_and_line = gdb.current_progspace().find_pc_line(int(pc))
+
+      if sym_and_line.symtab is not None:
+        return None
+      fp = pending_frame.read_register("rbp").reinterpret_cast(
+          gdb.lookup_type("void").pointer().pointer())
+
+      next_sp = fp
+      next_fp = fp.dereference()
+      next_pc = (fp+1).dereference()
+
+      frame_info = V8UnwinderFrameId(next_sp, next_pc)
+
+      # create_unwind_info seems to sometimes have issues accessing
+      # the frame_info if it's not first accessed in Python.
+      _lol_gdb_workaround = frame_info.pc + 1
+
+      unwind_info = pending_frame.create_unwind_info(frame_info)
+      unwind_info.add_saved_register("rsp", next_sp)
+      unwind_info.add_saved_register("rip", next_pc)
+      unwind_info.add_saved_register("rbp", next_fp)
+      return unwind_info
+    except Exception as e:
+      return None
+
+gdb.unwinder.register_unwinder(None, V8Unwinder(), replace=True)
+
+end