* testsuite/demangle-expected: Add test case for infinite loop in

demangler.
* cplus-dem.c (demangle_arm_hp_template): Stop trying to demangle
if do_type() doesn't make any progress --- prevents an infinite
loop.


git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@49875 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 9 insertions, 2 deletions

diff --git a/libiberty/cplus-dem.c b/libiberty/cplus-dem.c
index 710b69d9c7a..203e30dba24 100644
--- a/libiberty/cplus-dem.c
+++ b/libiberty/cplus-dem.c
@@ -2414,8 +2414,15 @@ demangle_arm_hp_template (work, mangled, n, declp)
             break;
           default:
             /* Not handling other HP cfront stuff */
-            if (!do_type (work, &args, &arg))
-              goto cfront_template_args_done;
+            {
+              const char* old_args = args;
+              if (!do_type (work, &args, &arg))
+                goto cfront_template_args_done;
+
+              /* Fail if we didn't make any progress: prevent infinite loop. */
+              if (args == old_args)
+                return;
+            }
 	  }
 	string_appends (declp, &arg);
 	string_append (declp, ",");