Tony Reix <tony.r...@atos.net> added the comment:
On AIX: root@castor4## gdb /opt/freeware/bin/python3 ... (gdb) run -m pdb Pb.py ... (Pdb) n b'def' > /home2/freeware/src/packages/BUILD/Python-3.8.5/32bit/Pb.py(35)<module>() -> print( (Pdb) n > /home2/freeware/src/packages/BUILD/Python-3.8.5/32bit/Pb.py(36)<module>() -> CFUNCTYPE(c_char_p, MemchrArgsHack2, (Pdb) Thread 2 received signal SIGINT, Interrupt. [Switching to Thread 1] 0x090000000016426c in __fd_select () from /usr/lib/libc.a(shr_64.o) (gdb) b ffi_call Breakpoint 1 at 0x1217918 (gdb) c ... (Pdb) n Thread 2 hit Breakpoint 1, 0x0900000001217918 in ffi_call () from /opt/freeware/lib/libffi.a(libffi.so.6) (gdb) where #0 0x0900000001217918 in ffi_call () from /opt/freeware/lib/libffi.a(libffi.so.6) #1 0x0900000001217780 in ffi_prep_cif_machdep () from /opt/freeware/lib/libffi.a(libffi.so.6) #2 0x0900000001216fb8 in ffi_prep_cif_var () from /opt/freeware/lib/libffi.a(libffi.so.6) ...... (gdb) b memchr Breakpoint 2 at 0x9000000001b0d60 (gdb) c Continuing. Thread 2 hit Breakpoint 2, 0x09000000001b0d60 in memchr () from /usr/lib/libc.a(shr_64.o) (gdb) i register r0 0x9000000001b0d60 648518346343124320 r1 0xfffffffffffc8d0 1152921504606832848 r2 0x9001000a008e8b8 648535941212334264 r3 0xa000000003669e0 720575940382845408 r4 0x64 100 r5 0x0 0 r6 0x9001000a04ee730 648535941216921392 r7 0x0 0 ... (gdb) x/s $r3 0xa000000003669e0: "abcdef" So: - the string is passed as r3. - r4 contains "d" = 0x64=100 - but the size 7 is missing Anyway, it seems that ffi does not pass the pointer, but values. However, the length 7 is missing. Not in r5, and nowhere in the other registers. ---------- _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue38628> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
