Squashed 'third_party/elfutils/' content from commit 555e15e

Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/tests/debugaltlink.c b/tests/debugaltlink.c
new file mode 100644
index 0000000..6d97d50
--- /dev/null
+++ b/tests/debugaltlink.c
@@ -0,0 +1,83 @@
+/* Test program for dwelf_dwarf_gnu_debugaltlink, print name and build ID.
+   Copyright (C) 2014 Red Hat, Inc.
+   This file is part of elfutils.
+
+   This file 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; either version 3 of the License, or
+   (at your option) any later version.
+
+   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 a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+#include <assert.h>
+#include <inttypes.h>
+#include <err.h>
+#include <errno.h>
+#include ELFUTILS_HEADER(dw)
+#include ELFUTILS_HEADER(dwelf)
+#include <stdio.h>
+#include <error.h>
+#include <string.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <unistd.h>
+
+int
+main (int argc, char *argv[])
+{
+  if (argc < 2)
+    error (EXIT_FAILURE, 0, "No input file given");
+
+  elf_version (EV_CURRENT);
+
+  for (int i = 1; i < argc; i++)
+    {
+      const char *file = argv[i];
+      int fd = open (file, O_RDONLY);
+      if (fd < 0)
+	error (EXIT_FAILURE, errno, "couldn't open file '%s'", file);
+
+      Dwarf *dwarf = dwarf_begin (fd, DWARF_C_READ);
+      if (dwarf == NULL)
+	{
+	  printf("%s: dwarf_begin failed: %s\n", file, dwarf_errmsg (-1));
+	  close (fd);
+	  continue;
+	}
+
+      const char *name;
+      const void *build_id;
+      ssize_t ret = dwelf_dwarf_gnu_debugaltlink
+	(dwarf, &name, &build_id);
+      switch (ret)
+	{
+	case 0:
+	  printf ("%s: <no .gnu_debugaltlink section>\n", file);
+	  break;
+	case -1:
+	  errx (1, "dwelf_dwarf_gnu_debugaltlink (%s): %s",
+		file, dwarf_errmsg (-1));
+	default:
+	  printf ("%s: %s, build ID: ", file, name);
+	  const unsigned char *p = build_id;
+	  const unsigned char *end = p + ret;
+	  while (p < end)
+	      printf("%02x", (unsigned)*p++);
+	  putchar('\n');
+	}
+
+      dwarf_end (dwarf);
+      close (fd);
+    }
+
+  return 0;
+}