On Thu, 5 Oct 2023 21:57:12 +0000 Beau Belgrave beaub@linux.microsoft.com wrote:

The abi_test currently uses a long sized test value for enablement checks. On LE this works fine, however, on BE this results in inaccurate assert checks due to a bit being used and assuming it's value is the same on both LE and BE.

Use int type for 32-bit values and long type for 64-bit values to ensure appropriate behavior on both LE and BE.

Fixes: 60b1af8de8c1 ("tracing/user_events: Add ABI self-test") Signed-off-by: Beau Belgrave beaub@linux.microsoft.com

---

V3 Changes: Fix missing cast in clone_check().

V2 Changes: Rebase to linux-kselftest/fixes.

Shuah,

Can you take this patch?

Acked-by: Steven Rostedt (Google) rostedt@goodmis.org

-- Steve

tools/testing/selftests/user_events/abi_test.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/tools/testing/selftests/user_events/abi_test.c b/tools/testing/selftests/user_events/abi_test.c index 8202f1327c39..f5575ef2007c 100644 --- a/tools/testing/selftests/user_events/abi_test.c +++ b/tools/testing/selftests/user_events/abi_test.c @@ -47,7 +47,7 @@ static int change_event(bool enable) return ret; } -static int reg_enable(long *enable, int size, int bit) +static int reg_enable(void *enable, int size, int bit) { struct user_reg reg = {0}; int fd = open(data_file, O_RDWR); @@ -69,7 +69,7 @@ static int reg_enable(long *enable, int size, int bit) return ret; } -static int reg_disable(long *enable, int bit) +static int reg_disable(void *enable, int bit) { struct user_unreg reg = {0}; int fd = open(data_file, O_RDWR); @@ -90,7 +90,8 @@ static int reg_disable(long *enable, int bit) } FIXTURE(user) {

• long check;

• int check;
• long check_long; bool umount;

}; @@ -99,6 +100,7 @@ FIXTURE_SETUP(user) { change_event(false); self->check = 0;

• self->check_long = 0;

} FIXTURE_TEARDOWN(user) { @@ -136,9 +138,9 @@ TEST_F(user, bit_sizes) { #if BITS_PER_LONG == 8 /* Allow 0-64 bits for 64-bit */

• ASSERT_EQ(0, reg_enable(&self->check, sizeof(long), 63));
• ASSERT_NE(0, reg_enable(&self->check, sizeof(long), 64));
• ASSERT_EQ(0, reg_disable(&self->check, 63));

• ASSERT_EQ(0, reg_enable(&self->check_long, sizeof(long), 63));
• ASSERT_NE(0, reg_enable(&self->check_long, sizeof(long), 64));
• ASSERT_EQ(0, reg_disable(&self->check_long, 63));

#endif /* Disallowed sizes (everything beside 4 and 8) */ @@ -200,7 +202,7 @@ static int clone_check(void *check) for (i = 0; i < 10; ++i) { usleep(100000);

• if (*(long *)check)
  

• if (*(int *)check)
  return 0;
  

  }

base-commit: 6f874fa021dfc7bf37f4f37da3a5aaa41fe9c39c