tests: Silence false positive warning on generated test name

qemu with hax to log dma reads & writes jcs.org/2018/11/12/vfio

Running 'make check' on rawhide with gcc 8.0.1 fails:

tests/test-visitor-serialization.c: In function 'main':
tests/test-visitor-serialization.c:1127:34: error: '/primitives/' directive writing 12 bytes into a region of size between 1 and 128 [-Werror=format-overflow=]

The warning is a false positive (we have two buffers of size 128,
so yes, if we FULLY used the first buffer, then sprint'ing it into
the second will overflow the second). But in practice, our first
buffer will not be longer than "/visitor/serialization/String",
so sizing it smaller is enough to let gcc see that we don't
overflow the second.

Signed-off-by: Eric Blake <eblake@redhat.com>
Message-Id: <20180323204341.1501664-1-eblake@redhat.com>
Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Eric Blake 8 years ago fdf235ba fa15cf8b

+1 -1

1 changed file

expand all

tests

test-visitor-serialization.c

+1 -1

tests/test-visitor-serialization.c

··· 1115 1115 1116 1116 static void add_visitor_type(const SerializeOps *ops) 1117 1117 { 1118 - char testname_prefix[128]; 1118 + char testname_prefix[32]; 1119 1119 char testname[128]; 1120 1120 TestArgs *args; 1121 1121 int i = 0;