Merge commit 'f1a1c4b8c0ca' from apple/stable/20200108 into swift/master

Author: git apple-llvm automerger

lldb/tools/debugserver/source/RNBRemote.cpp

@@ -3663,30 +3663,6 @@ static bool process_does_not_exist (nub_process_t pid) {
   return true; // process does not exist
 }
 
-static bool attach_failed_due_to_sip (nub_process_t pid) {
-  bool retval = false;
-#if defined(__APPLE__) &&                                                      \
-  (__ENVIRONMENT_MAC_OS_X_VERSION_MIN_REQUIRED__ >= 101000)
-
-  // csr_check(CSR_ALLOW_TASK_FOR_PID) will be nonzero if System Integrity
-  // Protection is in effect.
-  if (csr_check(CSR_ALLOW_TASK_FOR_PID) == 0) 
-    return false;
-
-  if (rootless_allows_task_for_pid(pid) == 0)
-    retval = true;
-
-  int csops_flags = 0;
-  int csops_ret = ::csops(pid, CS_OPS_STATUS, &csops_flags,
-                       sizeof(csops_flags));
-  if (csops_ret != -1 && (csops_flags & CS_RESTRICT)) {
-    retval = true;
-  }
-#endif
-
-  return retval;
-}
-
 // my_uid and process_uid are only initialized if this function
 // returns true -- that there was a uid mismatch -- and those
 // id's may want to be used in the error message.
@@ -4065,13 +4041,6 @@ rnb_err_t RNBRemote::HandlePacket_v(const char *p) {
                                            "processes.");
           return SendPacket(return_message.c_str());
         }
-        if (attach_failed_due_to_sip (pid_attaching_to)) {
-          DNBLogError("Attach failed because of SIP protection.");
-          std::string return_message = "E96;";
-          return_message += cstring_to_asciihex_string("cannot attach "
-                            "to process due to System Integrity Protection");
-          return SendPacket(return_message.c_str());
-        }
       }
 
       std::string error_explainer = "attach failed";