PR symtab/14931:

	* psymtab.c (struct psymtab_state): New.
	(discard_psymtabs_upto, make_cleanup_discard_psymtabs): New
	functions.
	* psympriv.h (make_cleanup_discard_psymtabs): Declare.
	* dwarf2read.c (dwarf2_build_psymtabs): Catch exceptions.
gdb/testsuite
	* gdb.dwarf2/dw2-error.exp: New file.
	* gdb.dwarf2/dw2-error.c: New file.
	* gdb.dwarf2/dw2-error.S: New file.

1 files changed, 38 insertions, 0 deletions

diff --git a/gdb/psymtab.c b/gdb/psymtab.c
index 5181ec3..24aef99 100644
--- a/gdb/psymtab.c
+++ b/gdb/psymtab.c
@@ -1798,6 +1798,44 @@ discard_psymtab (struct objfile *objfile, struct partial_symtab *pst)
   objfile->free_psymtabs = pst;
 }
 
+/* An object of this type is passed to discard_psymtabs_upto.  */
+
+struct psymtab_state
+{
+  /* The objfile where psymtabs are discarded.  */
+
+  struct objfile *objfile;
+
+  /* The first psymtab to save.  */
+
+  struct partial_symtab *save;
+};
+
+/* A cleanup function used by make_cleanup_discard_psymtabs.  */
+
+static void
+discard_psymtabs_upto (void *arg)
+{
+  struct psymtab_state *state = arg;
+
+  while (state->objfile->psymtabs != state->save)
+    discard_psymtab (state->objfile, state->objfile->psymtabs);
+}
+
+/* Return a new cleanup that discards all psymtabs created in OBJFILE
+   after this function is called.  */
+
+struct cleanup *
+make_cleanup_discard_psymtabs (struct objfile *objfile)
+{
+  struct psymtab_state *state = XNEW (struct psymtab_state);
+
+  state->objfile = objfile;
+  state->save = objfile->psymtabs;
+
+  return make_cleanup_dtor (discard_psymtabs_upto, state, xfree);
+}
+
 
 
 static void