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From 8dfe03984e5c8060b5baabd19478db9f89bc43d0 Mon Sep 17 00:00:00 2001
From: Oliver Reiche <oliver.reiche@huawei.com>
Date: Thu, 29 Jun 2023 15:47:17 +0200
Subject: [PATCH 1/4] Non-behavioral changing fix in gcc/cp/rtti.c
... to fix an infinite loop that occurs in the "cc1plus"
binary, if it was compiled with TinyCC version 0.9.27. Upon
closer inspection, the loop was infinitely executing the
lines 814, 820, and 823 of the following snippet:
---
812: function(...) {
813: while (true) {
814: if (...)
...
820: else if (...)
...
822: else
823: return ...;
824: }
---
Presumably, TinyCC somehow generates instructions that are
not able to exit the function from the return-statement
inside the while loop. The solution is a non-behavioral
changing fix: insert a break-statement in line 823 and
thereby move the return-statement outside the while loop.
---
gcc/cp/rtti.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/gcc/cp/rtti.c b/gcc/cp/rtti.c
index 30383ed18..faf639115 100644
--- a/gcc/cp/rtti.c
+++ b/gcc/cp/rtti.c
@@ -820,6 +820,7 @@ target_incomplete_p (tree type)
else if (TREE_CODE (type) == POINTER_TYPE)
type = TREE_TYPE (type);
else
+ break;
return !COMPLETE_OR_VOID_TYPE_P (type);
}
--
2.30.2
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