From e89b7783676052e81644c7047c5d5fce51e58a8c Mon Sep 17 00:00:00 2001
From: n-isaka <n-isaka@tsh-world.co.jp>
Date: Fri, 5 Apr 2019 14:13:56 +0900
Subject: [PATCH] =?UTF-8?q?fix(libcob):=20SIGSEGV=E7=99=BA=E7=94=9F?=
 =?UTF-8?q?=E6=99=82=E3=81=AB=E3=82=B9=E3=82=BF=E3=83=83=E3=82=AF=E3=83=88?=
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SIGSEGV発生時に、原因の追跡のための情報が不足しているため、
スタックトレースの出力を追加した
---
 libcob/common.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/libcob/common.c b/libcob/common.c
index 3968e819..8a3d6f51 100644
--- a/libcob/common.c
+++ b/libcob/common.c
@@ -208,6 +208,11 @@ cob_sig_handler (int sig)
 		}
 		fprintf (stderr, "Attempt to reference unallocated memory (Signal SIGSEGV)\n");
 		fprintf (stderr, "Abnormal termination - File contents may be incorrect\n");
+		fprintf (stderr, "---- trace start ----\n");
+		void *trace[128];
+		int n = backtrace(trace, sizeof(trace) / sizeof(trace[0]));
+		backtrace_symbols_fd(trace, n, 1);
+		fprintf (stderr, "---- trace  end  ----\n");
 		fflush (stderr);
 		exit (SIGSEGV);
 	}