gdb pretty-printers: fix StringPrinterHelper for gdb 8.0

Latest gdb release "lazy_string" validates the array size:

Traceback (most recent call last):
File "/work/lo/master/solenv/gdb/libreoffice/util/string.py", line
29, in to_string
return self.make_string(data, self.encoding, len)
File "/work/lo/master/solenv/gdb/libreoffice/util/string.py", line
66, in make_string
return data.lazy_string(encoding, length)
gdb.error: Length is larger than array size.

rtl_uString has "sal_Unicode buffer[1];", which is a lie
as the real size is the same as "length".

Taking the address of "buffer" appears to avoid the exception.

Change-Id: I85710b1adfae584ba09c8d517e9b49b290e79d8a
(cherry picked from commit 205677c88cb01e2bbee278443867baed2c89e5fe)

1 files changed, 3 insertions, 3 deletions

diff --git a/solenv/gdb/libreoffice/util/string.py b/solenv/gdb/libreoffice/util/string.py
index 4583f5960ae1..9f7cb70028b5 100644
--- a/solenv/gdb/libreoffice/util/string.py
+++ b/solenv/gdb/libreoffice/util/string.py
@@ -52,15 +52,15 @@ class StringPrinterHelper(object):
         if not encoding:
             encoding = ''
 
-        if use_lazy_string:
-            return data.lazy_string(encoding, length)
-
         # we need to determine length, if not given (for sal_Unicode*)
         if length < 0:
             length = 0
             while data[length] != 0 and length <= 512: # arbitrary limit
                 length += 1
 
+        if use_lazy_string:
+            return data.lazy_string(encoding, length)
+
         # The gdb.Value.string() conversion works on array of bytes, but
         # the length we have is the length of the string. So we must
         # multiply it by width of character if the string is Unicode.