This issue tracker has been migrated to GitHub, and is currently read-only.
For more information, see the GitHub FAQs in the Python's Developer Guide.

Author eryksun
Recipients Igor Kudrin, christian.heimes, doko, eryksun, mark.dickinson, meador.inge, paul.moore, steve.dower, tim.golden, vinay.sajip, zach.ware
Date 2017-02-17.18:06:08
SpamBayes Score -1.0
Marked as misclassified Yes
Message-id <1487354768.98.0.539543353446.issue29565@psf.upfronthosting.co.za>
In-reply-to
Content
This issue is more straight-forward than #22273. ISTM, we just have to copy large values. For example, in ffi_call, we'd iterate over the arguments and alloca and memcpy the large values prior to calling ffi_call_AMD64:

    case FFI_SYSV:
      /* If a single argument takes more than 8 bytes,
         then a copy is passed by reference. */
      for (unsigned i = 0; i < cif->nargs; i++) {
          size_t z = cif->arg_types[i]->size;
          if (z > 8) {
              void *temp = alloca(z);
              memcpy(temp, avalue[i], z);
              avalue[i] = temp;
          }
      }
      /*@-usedef@*/
      return ffi_call_AMD64(ffi_prep_args, &ecif, cif->bytes,
                            cif->flags, ecif.rvalue, fn);
      /*@=usedef@*/
      break;
History
Date User Action Args
2017-02-17 18:06:09eryksunsetrecipients: + eryksun, doko, paul.moore, vinay.sajip, mark.dickinson, christian.heimes, tim.golden, meador.inge, zach.ware, steve.dower, Igor Kudrin
2017-02-17 18:06:08eryksunsetmessageid: <1487354768.98.0.539543353446.issue29565@psf.upfronthosting.co.za>
2017-02-17 18:06:08eryksunlinkissue29565 messages
2017-02-17 18:06:08eryksuncreate