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/dwelfgnucompressed.c b/tests/dwelfgnucompressed.c
new file mode 100644
index 0000000..0132271
--- /dev/null
+++ b/tests/dwelfgnucompressed.c
@@ -0,0 +1,104 @@
+/* Copyright (C) 2015 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/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <assert.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <inttypes.h>
+
+#include ELFUTILS_HEADER(elf)
+#include ELFUTILS_HEADER(dwelf)
+#include <gelf.h>
+
+#include <stdio.h>
+#include <unistd.h>
+#include <string.h>
+
+int
+main (int argc, char *argv[])
+{
+  int result = 0;
+  int cnt;
+
+  elf_version (EV_CURRENT);
+
+  for (cnt = 1; cnt < argc; ++cnt)
+    {
+      int fd = open (argv[cnt], O_RDONLY);
+
+      Elf *elf = elf_begin (fd, ELF_C_READ, NULL);
+      if (elf == NULL)
+	{
+	  printf ("%s not usable %s\n", argv[cnt], elf_errmsg (-1));
+	  result = 1;
+	  close (fd);
+	  continue;
+	}
+
+      size_t shdrstrndx;
+      if (elf_getshdrstrndx (elf, &shdrstrndx) == -1)
+	{
+	  printf ("elf_getshdrstrnd failed %s\n", elf_errmsg (-1));
+	  result = 1;
+	  close (fd);
+	  continue;
+	}
+
+      Elf_Scn *scn = NULL;
+      while ((scn = elf_nextscn (elf, scn)) != NULL)
+	{
+	  int idx = elf_ndxscn (scn);
+	  GElf_Shdr shdr;
+	  if (gelf_getshdr (scn, &shdr) == NULL)
+	    {
+	      printf ("gelf_getshdr failed: %s\n", elf_errmsg (-1));
+	      result = 1;
+	      break;
+	    }
+
+	  const char *sname = elf_strptr (elf, shdrstrndx, shdr.sh_name);
+	  if (sname == NULL)
+	    {
+	      printf ("couldn't get section name: %s\n", elf_errmsg (-1));
+	      result = 1;
+	      break;
+	    }
+
+	  if (strncmp(".zdebug", sname, strlen (".zdebug")) == 0)
+	    {
+	      ssize_t size;
+	      if ((size = dwelf_scn_gnu_compressed_size (scn)) == -1)
+		{
+		  printf ("dwelf_scn_gnu_compressed_size failed: %s\n",
+			  elf_errmsg (-1));
+		  result = 1;
+		  break;
+		}
+	      printf ("section %d: GNU Compressed size: %zx\n", idx, size);
+	    }
+	}
+
+      elf_end (elf);
+      close (fd);
+    }
+
+  return result;
+}