Fix: tests: `-Wstringop-overflow` warning

I get the following warning when compiling with `-Wall -Werror` with gcc
9.3.0:
  In file included from ../../src/common/macros.h:15,
                   from ../../src/common/lttng-kernel.h:14,
                   from ../../src/bin/lttng-sessiond/trace-kernel.h:14,
                   from test_kernel_data.c:16:
  In function ‘lttng_strnlen’,
      inlined from ‘lttng_strncpy’ at ../../src/common/macros.h:120:6,
      inlined from ‘test_create_kernel_event’ at test_kernel_data.c:136:2:
  ../../src/common/compat/string.h:28:8: error: ‘memchr’ reading 256 bytes from a region of size 11 [-Werror=stringop-overflow=]
     28 |  end = memchr(str, 0, max);
      	|        ^~~~~~~~~~~~~~~~~~~

Fix this warning by using the RANDOM_STRING_LEN value as the max number
of bytes to copy.

Signed-off-by: Francis Deslauriers <francis.deslauriers@efficios.com>
Change-Id: I61752ee17163c4d642aad21b296c0fc4fad5b7a6
(cherry picked from commit 1dd622b10db0821d77490c937caee80c65332f14)
Signed-off-by: Jérémie Galarneau <jeremie.galarneau@efficios.com>

diff --git a/tests/unit/test_kernel_data.c b/tests/unit/test_kernel_data.c
index 134cd39ed1d7c27c25a6688705b3639e955df437..322c2eb211f12b0aec827c486451c806ab3646e8 100644 (file)
--- a/tests/unit/test_kernel_data.c
+++ b/tests/unit/test_kernel_data.c
@@ -134,7 +134,7 @@ static void test_create_kernel_event(void)
 
        memset(&ev, 0, sizeof(ev));
        ok(!lttng_strncpy(ev.name, get_random_string(),
-                       LTTNG_KERNEL_SYM_NAME_LEN),
+                       RANDOM_STRING_LEN),
                "Validate string length");
        ev.type = LTTNG_EVENT_TRACEPOINT;
        ev.loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL;