1 files changed, 52 insertions, 0 deletions
diff --git a/libdw/dwarf_linefunctionname.c b/libdw/dwarf_linefunctionname.c
new file mode 100644
index 00000000..e194d212
--- /dev/null
+++ b/libdw/dwarf_linefunctionname.c
@@ -0,0 +1,52 @@
+/* Return function name in line.
+   This file is part of elfutils.
+   Written by John Mellor-Crummey <[email protected]>, 2021.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <string.h>
+#include "libdwP.h"
+
+
+const char *
+dwarf_linefunctionname (Dwarf *dbg, Dwarf_Line *line)
+{
+  if (dbg == NULL || line == NULL)
+    return NULL;
+  if (line->context == 0)
+    return NULL;
+
+  Elf_Data *str_data = dbg->sectiondata[IDX_debug_str];
+  if (str_data == NULL || line->function_name >= str_data->d_size
+      || memchr (str_data->d_buf + line->function_name, '\0',
+		 str_data->d_size - line->function_name) == NULL)
+    return NULL;
+
+  return (char *) str_data->d_buf + line->function_name;
+}