libubacktrace: Provide uClibc with backtrace functions

A new shared object, libubacktrace.so.0 is added to uClibc
to provide backtrace functions to support application self-debugging.
This set of functions requires to dynamically load libgcc_s.so so they
need to call dlopen/dlsym that are provided by libdl. For this reason
they cannot be included into libc.so.0 but are provided by a new library.

User application that wants to use backtrace needs to be compiled with
-fexceptions option and -rdynamic to get full symbols printed and must be
linked against libubacktrace.so

Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>

1 files changed, 44 insertions, 0 deletions

diff --git a/include/execinfo.h b/include/execinfo.h
new file mode 100644
index 000000000..c1614cc1f
--- /dev/null
+++ b/include/execinfo.h
@@ -0,0 +1,44 @@
+/* Copyright (C) 1998, 1999, 2004, 2005 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, write to the Free
+   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+   02111-1307 USA.  */
+
+#ifndef _EXECINFO_H
+#define _EXECINFO_H 1
+
+#include <features.h>
+
+__BEGIN_DECLS
+
+/* Store up to SIZE return address of the current program state in
+   ARRAY and return the exact number of values stored.  */
+extern int backtrace (void **__array, int __size) __nonnull ((1));
+
+
+/* Return names of functions from the backtrace list in ARRAY in a newly
+   malloc()ed memory block.  */
+extern char **backtrace_symbols (void *__const *__array, int __size)
+     __THROW __nonnull ((1));
+
+
+/* This function is similar to backtrace_symbols() but it writes the result
+   immediately to a file.  */
+extern void backtrace_symbols_fd (void *__const *__array, int __size, int __fd)
+     __THROW __nonnull ((1));
+
+__END_DECLS
+
+#endif /* execinfo.h  */