[PATCH] RISC-V: Fix a non null-terminated string.

[Kuan-Lin Chen]

Fix the random error in gcc.target/riscv/target-attr-06.c.

gcc/ChangeLog:

        * config/riscv/riscv-target-attr.cc (riscv_process_target_str): Clean
        the final byte of str_to_check.

---
 gcc/config/riscv/riscv-target-attr.cc | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gcc/config/riscv/riscv-target-attr.cc 
b/gcc/config/riscv/riscv-target-attr.cc
index 54edeebf93c..15b4a932502 100644
--- a/gcc/config/riscv/riscv-target-attr.cc
+++ b/gcc/config/riscv/riscv-target-attr.cc
@@ -371,6 +371,7 @@ riscv_process_target_str (string_slice args,
 
   std::unique_ptr<char[]> buf (new char[len+1]);
   char *str_to_check = buf.get ();
+  memset(str_to_check + len, 0, 1);
   strncpy (str_to_check, args.begin (), args.size ());
 
   /* Used to catch empty spaces between semi-colons i.e.
-- 
2.34.1