app/debugging: add address sanitizer example

The address sanitizer is a useful tool for debugging lots of memory related bugs
such as heap/stack overflows, user after frees and much more.

Signed-off-by: Kurt Kanzenbach <kurt@linutronix.de>

1 files changed, 22 insertions, 0 deletions

diff --git a/application-devel/debugging-tools/pres_debugging-tools_en.tex b/application-devel/debugging-tools/pres_debugging-tools_en.tex
index 7fc8501..ed34c3b 100644
--- a/application-devel/debugging-tools/pres_debugging-tools_en.tex
+++ b/application-devel/debugging-tools/pres_debugging-tools_en.tex
@@ -615,4 +615,26 @@ $ valgrind --leak-check=full ./array_access
 \end{verbatim}
 \end{frame}
 
+\begin{frame}[fragile]{AddressSanitizer}
+\begin{verbatim}
+$ gcc -o array_access -fsanitize=address array_access.c
+$ ./array_access
+=================================================================
+==5623==ERROR: AddressSanitizer: heap-buffer-overflow
+READ of size 4 at 0x60400000dff8 thread T0
+    #0 0x56525f56eabf in main
+    #1 0x7fa413d042e0 in __libc_start_main
+    #2 0x56525f56e949 in _start
+
+0x60400000dff8 is located 0 bytes to the right of 40-byte region
+allocated by thread T0 here:
+    #0 0x7fa414144ed0 in calloc
+    #1 0x56525f56ea66 in main
+    #2 0x7fa413d042e0 in __libc_start_main
+
+SUMMARY: AddressSanitizer: heap-buffer-overflow  in main
+[...]
+\end{verbatim}
+\end{frame}
+
 \input{tailpres}