Squashed 'third_party/elfutils/' content from commit 555e15e
Change-Id: I61cde98949e47e5c8c09c33260de17f30921be79
git-subtree-dir: third_party/elfutils
git-subtree-split: 555e15ebe8bf1eb33d00747173cfc80cc65648a4
diff --git a/libdw/dwarf_end.c b/libdw/dwarf_end.c
new file mode 100644
index 0000000..f6915ab
--- /dev/null
+++ b/libdw/dwarf_end.c
@@ -0,0 +1,120 @@
+/* Release debugging handling context.
+ Copyright (C) 2002-2011, 2014, 2018 Red Hat, Inc.
+ This file is part of elfutils.
+ Written by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <search.h>
+#include <stdlib.h>
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "libdwP.h"
+#include "cfi.h"
+
+
+static void
+noop_free (void *arg __attribute__ ((unused)))
+{
+}
+
+
+static void
+cu_free (void *arg)
+{
+ struct Dwarf_CU *p = (struct Dwarf_CU *) arg;
+
+ Dwarf_Abbrev_Hash_free (&p->abbrev_hash);
+
+ tdestroy (p->locs, noop_free);
+}
+
+
+int
+dwarf_end (Dwarf *dwarf)
+{
+ if (dwarf != NULL)
+ {
+ if (dwarf->cfi != NULL)
+ /* Clean up the CFI cache. */
+ __libdw_destroy_frame_cache (dwarf->cfi);
+
+ Dwarf_Sig8_Hash_free (&dwarf->sig8_hash);
+
+ /* The search tree for the CUs. NB: the CU data itself is
+ allocated separately, but the abbreviation hash tables need
+ to be handled. */
+ tdestroy (dwarf->cu_tree, cu_free);
+ tdestroy (dwarf->tu_tree, cu_free);
+
+ /* Search tree for macro opcode tables. */
+ tdestroy (dwarf->macro_ops, noop_free);
+
+ /* Search tree for decoded .debug_lines units. */
+ tdestroy (dwarf->files_lines, noop_free);
+
+ struct libdw_memblock *memp = dwarf->mem_tail;
+ /* The first block is allocated together with the Dwarf object. */
+ while (memp->prev != NULL)
+ {
+ struct libdw_memblock *prevp = memp->prev;
+ free (memp);
+ memp = prevp;
+ }
+
+ /* Free the pubnames helper structure. */
+ free (dwarf->pubnames_sets);
+
+ /* Free the ELF descriptor if necessary. */
+ if (dwarf->free_elf)
+ elf_end (dwarf->elf);
+
+ /* Free the fake location list CU. */
+ if (dwarf->fake_loc_cu != NULL)
+ {
+ cu_free (dwarf->fake_loc_cu);
+ free (dwarf->fake_loc_cu);
+ }
+
+ /* Did we find and allocate the alt Dwarf ourselves? */
+ if (dwarf->alt_fd != -1)
+ {
+ INTUSE(dwarf_end) (dwarf->alt_dwarf);
+ close (dwarf->alt_fd);
+ }
+
+ /* Free the context descriptor. */
+ free (dwarf);
+ }
+
+ return 0;
+}
+INTDEF(dwarf_end)