[gcc r15-5025] btf: check hash maps are non-null before emptying

[David Faust via Gcc-cvs]

https://gcc.gnu.org/g:6571e8f863736b7705f59c9ab0f17b7c4fdbcf92

commit r15-5025-g6571e8f863736b7705f59c9ab0f17b7c4fdbcf92
Author: David Faust <david.fa...@oracle.com>
Date:   Thu Nov 7 09:19:51 2024 -0800

    btf: check hash maps are non-null before emptying
    
    These maps will always be non-null in btf_finalize under normal
    circumstances, but be safe and verify that before trying to empty them.
    
    gcc/
            * btfout.cc (btf_finalize): Check that hash maps are non-null before
            emptying them.

Diff:
---
 gcc/btfout.cc | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/gcc/btfout.cc b/gcc/btfout.cc
index 083ca48d6279..4a6b5453e08e 100644
--- a/gcc/btfout.cc
+++ b/gcc/btfout.cc
@@ -1661,13 +1661,19 @@ btf_finalize (void)
   datasecs.release ();
 
   funcs = NULL;
-  func_map->empty ();
-  func_map = NULL;
+  if (func_map)
+    {
+      func_map->empty ();
+      func_map = NULL;
+    }
 
   if (debug_prune_btf)
     {
-      btf_used_types->empty ();
-      btf_used_types = NULL;
+      if (btf_used_types)
+       {
+         btf_used_types->empty ();
+         btf_used_types = NULL;
+       }
 
       fixups.release ();
       forwards = NULL;