Linux and OSX have different alignment rules, that's why the difference.
This was fixed a few months back on master. If it's failing please file a
bug report.
--
Rodrigo
On Thu, Jun 19, 2014 at 2:19 PM, Damien Diederen d...@crosstwine.com wrote:
Hello,
I am observing the following failure on Linux 86:
$ cd mono/tests
$ mono marshal7.exe; echo $?
14
which corresponds to the following check:
if (Marshal.SizeOf (typeof (TestStruct8)) != 16)
return 14;
My current build of Mono returns 12. Which seems reasonable according
to GCC (on the same machine, and on any 32-bit Linux I could test it
on):
$ cat foo.c
#include stdio.h
#include stddef.h
#include stdint.h
struct TestStruct8 {
int a;
uint64_t b;
};
int main(int argc, char **argv) {
size_t size = sizeof(struct TestStruct8);
size_t offset_a = offsetof(struct TestStruct8, a);
size_t offset_b = offsetof(struct TestStruct8, b);
printf(Size: %zu, Offset A: %zu, Offset B: %zu\n,
size, offset_a, offset_b);
return 0;
}
^D
$ gcc -m32 -g -Wall -o foo foo.c
$ ./foo
Size: 12, Offset A: 0, Offset B: 4
Could the test be wrong, and should 32-bit Linux be folded with OS X:
if (IsOSX () IntPtr.Size == 4) {
if (Marshal.SizeOf (typeof (TestStruct8)) != 12)
return 14;
...
The test was last modified with the fix to Bug #4510, which is
relatively recent; could it be that it has not been verified on a 32-bit
Linux machine yet?
Thanks,
Damien
--
http://crosstwine.com
tel: +49 89 2189 2939
cell: +49 174 3489 428
“Strong Opinions, Weakly Held”
— Bob Johansen
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