From ece0b0623c9c14a2a1de61c53be9e1bcc2b6216c Mon Sep 17 00:00:00 2001
From: Oleksandr Byelkin <sanja@mariadb.com>
Date: Sun, 16 Aug 2020 22:14:59 +0200
Subject: MDEV-23491: __bss_start breaks compilation of various platforms

Remove __bss_start & Co, because systen call "write" check buffer address and return EFAULT if it is wrong.
---
 unittest/mysys/CMakeLists.txt |  2 +-
 unittest/mysys/stacktrace-t.c | 67 +++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 68 insertions(+), 1 deletion(-)
 create mode 100644 unittest/mysys/stacktrace-t.c

(limited to 'unittest')

diff --git a/unittest/mysys/CMakeLists.txt b/unittest/mysys/CMakeLists.txt
index 9ad7e76f547..dd1aa85c9c6 100644
--- a/unittest/mysys/CMakeLists.txt
+++ b/unittest/mysys/CMakeLists.txt
@@ -15,7 +15,7 @@
 
 MY_ADD_TESTS(bitmap base64 my_atomic my_rdtsc lf my_malloc my_getopt dynstring
              aes
-             queues LINK_LIBRARIES mysys)
+             queues stacktrace LINK_LIBRARIES mysys)
 MY_ADD_TESTS(my_vsnprintf LINK_LIBRARIES strings mysys)
 
 ADD_DEFINITIONS(${SSL_DEFINES})
diff --git a/unittest/mysys/stacktrace-t.c b/unittest/mysys/stacktrace-t.c
new file mode 100644
index 00000000000..8fa0db15b36
--- /dev/null
+++ b/unittest/mysys/stacktrace-t.c
@@ -0,0 +1,67 @@
+
+/* Copyright (c) 2020, MariaDB Corporation.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; version 2 of the License.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA */
+
+#include <my_global.h>
+#include <my_sys.h>
+#include <stdio.h>
+#include <my_stacktrace.h>
+#include <tap.h>
+
+char b_bss[10];
+
+void test_my_safe_print_str()
+{
+  char b_stack[10];
+  char *b_heap= strdup("LEGAL");
+  memcpy(b_stack, "LEGAL", 6);
+  memcpy(b_bss, "LEGAL", 6);
+
+#ifndef __SANITIZE_ADDRESS__
+  fprintf(stderr, "\n===== stack =====\n");
+  my_safe_print_str(b_stack, 65535);
+  fprintf(stderr, "\n===== heap =====\n");
+  my_safe_print_str(b_heap, 65535);
+  fprintf(stderr, "\n===== BSS =====\n");
+  my_safe_print_str(b_bss, 65535);
+  fprintf(stderr, "\n===== data =====\n");
+  my_safe_print_str("LEGAL", 65535);
+  fprintf(stderr, "\n===== Above is a junk, but it is expected. =====\n");
+#endif /*__SANITIZE_ADDRESS__*/
+  fprintf(stderr, "\n===== Nornal length test =====\n");
+  my_safe_print_str("LEGAL", 5);
+  fprintf(stderr, "\n===== NULL =====\n");
+  my_safe_print_str(0, 5);
+#ifndef __SANITIZE_ADDRESS__
+  fprintf(stderr, "\n===== (const char*) 1 =====\n");
+  my_safe_print_str((const char*)1, 5);
+#endif /*__SANITIZE_ADDRESS__*/
+
+  free(b_heap);
+
+  ok(1, "test_my_safe_print_str");
+}
+
+
+int main(int argc __attribute__((unused)), char **argv)
+{
+  MY_INIT(argv[0]);
+  plan(1);
+
+  test_my_safe_print_str();
+
+  my_end(0);
+  return exit_status();
+}
-- 
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