libdw and libdwfl srcfiles and srclines fixes for partial_units.

dwfl_getsrclines would always fail, even when lines were found.
dwarf_decl_file, and other functions relying on srcfiles or srclines would
fail for DIEs in partial_units because stmt_lists on partial_units
were ignored.

Note that dwz contained a bug which makes things fail in __libdw_formptr
for DW_AT_stmt_list with a bogus DW_FORM even with these fixes.
https://bugzilla.redhat.com/show_bug.cgi?id=919755

Signed-off-by: Mark Wielaard <mjw@redhat.com>
diff --git a/tests/dwfllines.c b/tests/dwfllines.c
new file mode 100644
index 0000000..90379dd
--- /dev/null
+++ b/tests/dwfllines.c
@@ -0,0 +1,164 @@
+/* Copyright (C) 2013 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 <inttypes.h>
+#include <assert.h>
+#include ELFUTILS_HEADER(dw)
+#include ELFUTILS_HEADER(dwfl)
+#include <dwarf.h>
+#include <argp.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <error.h>
+
+int
+main (int argc, char *argv[])
+{
+  int cnt;
+
+  Dwfl *dwfl = NULL;
+  (void) argp_parse (dwfl_standard_argp (), argc, argv, 0, &cnt, &dwfl);
+  assert (dwfl != NULL);
+
+  Dwarf_Die *cu = NULL;
+  Dwarf_Addr bias;
+  do
+    {
+      cu = dwfl_nextcu (dwfl, cu, &bias);
+      if (cu != NULL)
+	{
+	  Dwfl_Module *mod = dwfl_cumodule (cu);
+	  const char *modname = (dwfl_module_info (mod, NULL, NULL, NULL,
+						   NULL, NULL, NULL, NULL)
+				 ?: "<unknown>");
+	  const char *cuname = (dwarf_diename (cu) ?: "<unknown>");
+
+	  printf ("mod: %s CU: [%" PRIx64 "] %s\n", modname,
+		  dwarf_dieoffset (cu), cuname);
+
+	  size_t lines;
+	  if (dwfl_getsrclines (cu, &lines) != 0)
+	    continue; // No lines...
+
+	  for (size_t i = 0; i < lines; i++)
+	    {
+	      Dwfl_Line *line = dwfl_onesrcline (cu, i);
+
+	      Dwarf_Addr addr;
+	      int lineno;
+	      int colno;
+	      Dwarf_Word mtime;
+	      Dwarf_Word length;
+	      const char *src = dwfl_lineinfo (line, &addr, &lineno, &colno,
+					       &mtime, &length);
+
+	      Dwarf_Addr dw_bias;
+	      Dwarf_Line *dw_line = dwfl_dwarf_line (line, &dw_bias);
+	      assert (bias == dw_bias);
+
+	      Dwarf_Addr dw_addr;
+	      if (dwarf_lineaddr (dw_line, &dw_addr) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineaddr: %s",
+		       dwarf_errmsg (-1));
+	      assert (addr == dw_addr + dw_bias);
+
+	      unsigned int dw_op_index;
+	      if (dwarf_lineop_index (dw_line, &dw_op_index) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineop_index: %s",
+		       dwarf_errmsg (-1));
+
+	      int dw_lineno;
+	      if (dwarf_lineno (dw_line, &dw_lineno) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineno: %s",
+		       dwarf_errmsg (-1));
+	      assert (lineno == dw_lineno);
+
+	      int dw_colno;
+	      if (dwarf_linecol (dw_line, &dw_colno) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineno: %s",
+		       dwarf_errmsg (-1));
+	      assert (colno == dw_colno);
+
+	      bool begin;
+	      if (dwarf_linebeginstatement (dw_line, &begin) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_linebeginstatement: %s",
+		       dwarf_errmsg (-1));
+
+	      bool end;
+	      if (dwarf_lineendsequence (dw_line, &end) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineendsequence: %s",
+		       dwarf_errmsg (-1));
+
+	      bool pend;
+	      if (dwarf_lineprologueend (dw_line, &pend) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineprologueend: %s",
+		       dwarf_errmsg (-1));
+
+	      bool ebegin;
+	      if (dwarf_lineepiloguebegin (dw_line, &ebegin) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineepiloguebegin: %s",
+		       dwarf_errmsg (-1));
+
+	      bool block;
+	      if (dwarf_lineblock (dw_line, &block) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineblock: %s",
+		       dwarf_errmsg (-1));
+
+	      unsigned int isa;
+	      if (dwarf_lineisa (dw_line, &isa) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_lineisa: %s",
+		       dwarf_errmsg (-1));
+
+	      unsigned int disc;
+	      if (dwarf_linediscriminator (dw_line, &disc) != 0)
+		error (EXIT_FAILURE, 0, "dwarf_linediscriminator: %s",
+		       dwarf_errmsg (-1));
+
+	      const char *dw_src;
+	      Dwarf_Word dw_mtime;
+	      Dwarf_Word dw_length;
+	      dw_src = dwarf_linesrc (dw_line, &dw_mtime, &dw_length);
+	      assert (strcmp (src, dw_src) == 0);
+	      assert (mtime == dw_mtime);
+	      assert (length == dw_length);
+
+	      printf ("%zd %#" PRIx64 " %s:%d:%d\n"
+		      " time: %#" PRIX64 ", len: %" PRIu64
+		      ", idx: %d, b: %d, e: %d"
+		      ", pe: %d, eb: %d, block: %d"
+		      ", isa: %d, disc: %d\n",
+		      i, addr, src, lineno, colno, mtime, length,
+		      dw_op_index, begin, end, pend, ebegin, block, isa, disc);
+
+	      Dwarf_Die *linecu = dwfl_linecu (line);
+	      assert (cu == linecu);
+
+	      Dwfl_Module *linemod = dwfl_linemodule (line);
+	      assert (mod == linemod);
+	    }
+	}
+    }
+  while (cu != NULL);
+
+  dwfl_end (dwfl);
+
+  return 0;
+}