diff --git a/sdk/perfetto.h b/sdk/perfetto.h
--- a/sdk/perfetto.h
+++ b/sdk/perfetto.h
@@ -371,8 +371,7 @@
 
 #if defined(__clang__)
 #if __has_feature(address_sanitizer) || defined(__SANITIZE_ADDRESS__)
-extern "C" void __asan_poison_memory_region(void const volatile*, size_t);
-extern "C" void __asan_unpoison_memory_region(void const volatile*, size_t);
+#include "mozilla/MemoryChecking.h"
 #define PERFETTO_ASAN_POISON(a, s) __asan_poison_memory_region((a), (s))
 #define PERFETTO_ASAN_UNPOISON(a, s) __asan_unpoison_memory_region((a), (s))
 #else
@@ -19790,6 +19789,7 @@ class TrackEventDataSource
 #define PERFETTO_INTERNAL_EVENT_FINALIZER_KEYWORD default
 #endif
 
+#include <mozilla/Attributes.h>
 #define PERFETTO_INTERNAL_SCOPED_EVENT_FINALIZER(category)                    \
   struct PERFETTO_UID(ScopedEvent) {                                          \
     struct EventFinalizer {                                                   \
@@ -19800,7 +19800,7 @@ class TrackEventDataSource
       /* TrackEventArgumentFunction in |__VA_ARGS__|. This is required so  */ \
       /* that the scoped event is exactly ONE line and can't escape the    */ \
       /* scope if used in a single line if statement.                      */ \
-      EventFinalizer(...) {}                                                  \
+      MOZ_IMPLICIT EventFinalizer(...) {}                                     \
       ~EventFinalizer() {                                                     \
         TRACE_EVENT_END(category);                                            \
       }                                                                       \