Vinay Sajip added the comment:
Thanks for spelling it out for me, that's helpful. But I'm still confused about
a couple of things: I can't find classify_argument in the Python source tree
other than in
Modules/_ctypes/libffi_osx/x86/x86-ffi64.c
Is that the file you referred to as ffi64.c? I assumed this is only used on OS
X. Do we just use the system libffi on Linux?
I also note that if I use the following:
typedef struct {
int foo;
int bar;
unsigned char data[8];
} Test;
which is certainly the same size of struct, there's no abort and the sum is
correctly calculated and returned as 28, which is printed by the Python script.
If I swap things around so that the array comes first in the structure, that
also works. If I increase the array size back to 16 (giving a total structure
size of 24), that also works. If I then comment out the 'int foo' and 'int bar'
fields in both C and Python, the abort reappears.
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