diff --git a/libc/bionic/pthread_create.cpp b/libc/bionic/pthread_create.cpp
index 2ded22b..d1aeb93 100644
--- a/libc/bionic/pthread_create.cpp
+++ b/libc/bionic/pthread_create.cpp
@@ -41,13 +41,6 @@
 #include "private/ErrnoRestorer.h"
 #include "private/ScopedPthreadMutexLocker.h"
 
-// Used by gdb to track thread creation. See libthread_db.
-#ifdef __i386__
-extern "C" __attribute__((noinline)) __attribute__((fastcall)) void _thread_created_hook(pid_t) {}
-#else
-extern "C" __attribute__((noinline)) void _thread_created_hook(pid_t) {}
-#endif
-
 // x86 uses segment descriptors rather than a direct pointer to TLS.
 #if __i386__
 #include <asm/ldt.h>
@@ -56,8 +49,6 @@
 
 static pthread_mutex_t g_pthread_stack_creation_lock = PTHREAD_MUTEX_INITIALIZER;
 
-static pthread_mutex_t g_debugger_notification_lock = PTHREAD_MUTEX_INITIALIZER;
-
 extern "C" int __isthreaded;
 
 // This code is used both by each new pthread and the code that initializes the main thread.
@@ -258,12 +249,6 @@
     return init_errno;
   }
 
-  // Notify any debuggers about the new thread.
-  {
-    ScopedPthreadMutexLocker debugger_locker(&g_debugger_notification_lock);
-    _thread_created_hook(thread->tid);
-  }
-
   // Publish the pthread_t and unlock the mutex to let the new thread start running.
   *thread_out = reinterpret_cast<pthread_t>(thread);
   pthread_mutex_unlock(&thread->startup_handshake_mutex);