feat(profiling): Support for multithreaded profiles

A signal handler can only be installed on the main thread, this was the reason
why we could not use signals to profile multithreaded programs. This change
installs the signal handler during sdk initialization which should happen on the
main thread. The timers are still started on the individual threads to allow for
profiles being recorded from different threads.

sentry_sdk/_types.py

@@ -45,6 +45,7 @@
         "attachment",
         "session",
         "internal",
+        "profile",
     ]
     SessionStatus = Literal["ok", "exited", "crashed", "abnormal"]
     EndpointType = Literal["store", "envelope"]

sentry_sdk/client.py

@@ -403,6 +403,7 @@ def capture_event(
             if is_transaction:
                 if "profile" in event_opt:
                     event_opt["profile"]["transaction_id"] = event_opt["event_id"]
+                    event_opt["profile"]["environment"] = event_opt.get("environment")
                     event_opt["profile"]["version_name"] = event_opt.get("release", "")
                     envelope.add_profile(event_opt.pop("profile"))
                 envelope.add_transaction(event_opt)

sentry_sdk/envelope.py

@@ -252,6 +252,8 @@ def data_category(self):
             return "error"
         elif ty == "client_report":
             return "internal"
+        elif ty == "profile":
+            return "profile"
         else:
             return "default"
 

sentry_sdk/integrations/profiling.py

@@ -0,0 +1,14 @@
+from sentry_sdk.integrations import DidNotEnable, Integration
+from sentry_sdk.profiler import _setup_profiler
+
+
+class ProfilingIntegration(Integration):
+    identifier = "profiling"
+
+    @staticmethod
+    def setup_once():
+        # type: () -> None
+        try:
+            _setup_profiler()
+        except ValueError:
+            raise DidNotEnable("Profiling can only be enabled from the main thread.")

sentry_sdk/integrations/wsgi.py

@@ -11,7 +11,7 @@
 from sentry_sdk.tracing import Transaction, TRANSACTION_SOURCE_ROUTE
 from sentry_sdk.sessions import auto_session_tracking
 from sentry_sdk.integrations._wsgi_common import _filter_headers
-from sentry_sdk.profiler import profiling
+from sentry_sdk.profiler import start_profiling
 
 from sentry_sdk._types import MYPY
 
@@ -131,7 +131,7 @@ def __call__(self, environ, start_response):
 
                     with hub.start_transaction(
                         transaction, custom_sampling_context={"wsgi_environ": environ}
-                    ), profiling(transaction, hub):
+                    ), start_profiling(transaction, hub):
                         try:
                             rv = self.app(
                                 environ,