[PULL 07/12] tests/tcg: better detect confused gdb which can't connect

[Alex Bennée]

While we may gamely give the right information it can still confuse
the wide range of GDBs out there. For example ppc64abi32-linux-user
reports:

  warning: Selected architecture powerpc:common is not compatible with reported 
target architecture powerpc:common64
  warning: Architecture rejected target-supplied description

but still connects. Add a test for a 0 pc and exit early if that is
the case. This may actually be a bug we need to fix?

Signed-off-by: Alex Bennée <address@hidden>
Reviewed-by: Richard Henderson <address@hidden>
Message-Id: <address@hidden>

diff --git a/tests/tcg/multiarch/gdbstub/sha1.py 
b/tests/tcg/multiarch/gdbstub/sha1.py
index 734553b98bb..2bfde49633c 100644
--- a/tests/tcg/multiarch/gdbstub/sha1.py
+++ b/tests/tcg/multiarch/gdbstub/sha1.py
@@ -65,6 +65,10 @@ except (gdb.error, AttributeError):
     print("SKIPPING (not connected)", file=sys.stderr)
     exit(0)
 
+if gdb.parse_and_eval('$pc') == 0:
+    print("SKIP: PC not set")
+    exit(0)
+
 try:
     # These are not very useful in scripts
     gdb.execute("set pagination off")
-- 
2.20.1