28 Oct
2025
28 Oct
'25
8:26 p.m.
On Tue, 28 Oct 2025 22:28:10 +0530 Ankit Khushwaha ankitkhushwaha.linux@gmail.com wrote:
@@ -236,7 +237,8 @@ TEST_F(user, perf_empty_events) { ASSERT_EQ(1 << reg.enable_bit, self->check); /* Ensure write shows up at correct offset */
- ASSERT_NE(-1, write(self->data_fd, ®.write_index,
- memcpy(&write_index, ®.write_index, sizeof(reg.write_index));
- ASSERT_NE(-1, write(self->data_fd, &write_index, sizeof(reg.write_index)));
Simply casting &write_index to void* would fix this?
yes, this hides the type mismatch from the compiler. But i think casting to void * will not fix the alignment mismatch for packed struct. It works on x86, but might break on other platform.
It's the second argument to write(2)! write(2) expects a const char *, but void* will work.