Move profiling to c++ (#5771)

* Move profiling to c++

* comments

* Fix tests

* Start after constructor

* fix comment

* always init logging

* Fix logging

* fix logging issue

* shared_ptr for profiler

* DEBUG -> WARNING

* fix killed_ init

* Fix flaky checkpointing tests

* Fix checkpoint test logic

* Fix exception matching

* timeout exception

* Fix import

* fix build

* use boost::asio

* fix double const

* Properly reset async_wait

* remove SIGINT

* Change error message

* increase timeout

* small nits

* Don't trap on SIGINT

* -v for tune

* Fix test

python/ray/includes/libcoreworker.pxi

@@ -0,0 +1,42 @@
+from libcpp.string cimport string as c_string
+
+from ray.includes.libcoreworker cimport CProfileEvent
+
+import json
+import traceback
+
+cdef class ProfileEvent:
+    """Cython wrapper class of C++ `ray::worker::ProfileEvent`."""
+    cdef:
+        unique_ptr[CProfileEvent] inner
+        dict extra_data
+
+    @staticmethod
+    cdef make(unique_ptr[CProfileEvent] event, dict extra_data):
+        cdef ProfileEvent self = ProfileEvent.__new__(ProfileEvent)
+        self.inner = move(event)
+        self.extra_data = extra_data
+        return self
+
+    def set_extra_data(self, c_string extra_data):
+        self.inner.get().SetExtraData(extra_data)
+
+    def __enter__(self):
+        pass
+
+    def __exit__(self, type, value, tb):
+        extra_data = {}
+        if type is not None:
+            extra_data = {
+                "type": str(type),
+                "value": str(value),
+                "traceback": str(traceback.format_exc()),
+            }
+        elif self.extra_data is not None:
+            extra_data = self.extra_data
+
+        self.inner.get().SetExtraData(json.dumps(extra_data).encode("ascii"))
+
+        # Deleting the CProfileEvent will add it to a queue to be pushed to
+        # the driver.
+        self.inner.reset()