[incubator-mxnet] Diff for: [GitHub] lanking520 merged pull request #13842: Avoid adding SegfaultLogger if process already has sig handler.

[GitBox]

diff --git a/src/initialize.cc b/src/initialize.cc
index de7edd1b145..8d0e3c30421 100644
--- a/src/initialize.cc
+++ b/src/initialize.cc
@@ -44,7 +44,11 @@ class LibraryInitializer {
   LibraryInitializer() {
     dmlc::InitLogging("mxnet");
 #if MXNET_USE_SIGNAL_HANDLER && DMLC_LOG_STACK_TRACE
-    signal(SIGSEGV, SegfaultLogger);
+    struct sigaction sa;
+    sigaction(SIGSEGV, NULL, &sa);
+    if (sa.sa_handler == NULL) {
+        signal(SIGSEGV, SegfaultLogger);
+    }
 #endif
 
 // disable openmp for multithreaded workers


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