On 26/06/2019 06:20, Ravindra Kumar Meena wrote:
> + ctf_item.event = __builtin_bswap32( item->event );
Why is there this byte swap?
It will set its value in big-endian.
What it does here depends on the native endian setting.
Since this value will be passed as
big-endian. I have defined the typealias for the same in the metadata.
typealias integer { size = 64; align = 8; signed = false; byte_order=be;
} := uint64_t_be;
The trace description in our metadata is
trace {
major = 1;
minor = 8;
byte_order = le;
};
This defines that babeltrace has to read in little-endian byte order.
Hence, giving out correct value.
So basically we are passing big-endian value so that babeltrace can read
it in little-endian.
The target application simulated on Qemu is little endian and your
x86_64 host is little endian. There is absolutely no big endian stuff
involved here naturally. Your superfluous byte swap causes all the
trouble. Why you added it is a complete miracle to me.
Please remove the byte swap and change
typedef enum events_e : uint64_t_be {
to
typedef enum events_e : uint32_t {
--
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