From 79551f5c04d20990e64b26bf577f70eeaeb38652 Mon Sep 17 00:00:00 2001
From: Jakob Kaivo <jkk@ung.org>
Date: Tue, 14 Nov 2023 12:56:01 -0500
Subject: enable UB-testing for isupper()

---
 src/stdlib/__constraint_info.h |  3 +++
 src/stdlib/__stdlib.c          |  9 +++------
 src/stdlib/_stdlib.h           |  6 ++++++
 src/stdlib/abort_handler_s.c   | 17 +++++++++++------
 4 files changed, 23 insertions(+), 12 deletions(-)
 create mode 100644 src/stdlib/__constraint_info.h

(limited to 'src/stdlib')

diff --git a/src/stdlib/__constraint_info.h b/src/stdlib/__constraint_info.h
new file mode 100644
index 00000000..f8ffb539
--- /dev/null
+++ b/src/stdlib/__constraint_info.h
@@ -0,0 +1,3 @@
+struct __constraint_info {
+	const char *func;
+};
diff --git a/src/stdlib/__stdlib.c b/src/stdlib/__stdlib.c
index aa67fa10..b6423713 100644
--- a/src/stdlib/__stdlib.c
+++ b/src/stdlib/__stdlib.c
@@ -1,12 +1,9 @@
-#if 0
-
 #include "_stdlib.h"
 
-struct __stdlib __stdlib;
+struct __stdlib __stdlib = {
+	.constraint_handler = abort_handler_s,
+};
 
 /*
 STDC(0)
 */
-
-
-#endif
diff --git a/src/stdlib/_stdlib.h b/src/stdlib/_stdlib.h
index 929981a6..4d456594 100644
--- a/src/stdlib/_stdlib.h
+++ b/src/stdlib/_stdlib.h
@@ -7,6 +7,11 @@
 #define _rand(_n) \
 	(((_n) = (_n) * 1103515245 + 12345) ? (_n) / UINT_MAX % RAND_MAX : 0)
 
+#include "errno/errno_t.h"
+#include "constraint_handler_t.h"
+#include "__constraint_info.h"
+void abort_handler_s(const char * restrict msg, void * restrict ptr, errno_t error);
+
 struct __stdlib {
 	struct atexit {
         	int nfns;
@@ -16,6 +21,7 @@ struct __stdlib {
 	} atexit;
 	unsigned int rand;
 	char **environ;
+	constraint_handler_t constraint_handler;
 };
 
 extern struct __stdlib __stdlib;
diff --git a/src/stdlib/abort_handler_s.c b/src/stdlib/abort_handler_s.c
index 31d06568..7639ddfe 100644
--- a/src/stdlib/abort_handler_s.c
+++ b/src/stdlib/abort_handler_s.c
@@ -1,15 +1,20 @@
-#if 0
-
 #include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+//#include <errno.h>
+#include "errno/errno_t.h"
+#include "_stdlib.h"
 
 void abort_handler_s(const char * restrict msg, void * restrict ptr, errno_t error)
 {
-	__C_EXT(1, 201112L);
+	struct __constraint_info *ci = ptr;
+
+	puts(msg);
+	printf("In call to %s\n", ci->func);
+	printf("Provided error: %s (%d)\n", strerror(error), error);
+	abort();
 }
 
 /*
 CEXT1(201112)
 */
-
-
-#endif
-- 
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