Re: [Qemu-devel] [PATCH 2/2] Debug : Add error messages before a call to debug().

[Stefan Hajnoczi]

On Fri, Apr 15, 2016 at 08:32:54AM +0530, Prerna Saxena wrote:
> diff --git a/block/block-backend.c b/block/block-backend.c
> index d74f670..0aa8692 100644
> --- a/block/block-backend.c
> +++ b/block/block-backend.c
> @@ -407,6 +407,7 @@ BlockBackend *blk_by_legacy_dinfo(DriveInfo *dinfo)
>              return blk;
>          }
>      }
> +    error_report("Drive Info not found, Aborting.");

error_report() documentation says:

 * Format arguments like sprintf().  The resulting message should be a
 * single phrase, with no newline or trailing punctuation.

>      abort();
>  }
>  
> @@ -463,6 +464,8 @@ int blk_attach_dev(BlockBackend *blk, void *dev)
>  void blk_attach_dev_nofail(BlockBackend *blk, void *dev)
>  {
>      if (blk_attach_dev(blk, dev) < 0) {
> +        error_report("Attaching device model to block %s failed. Aborting",

Please use '%s' instead of just %s for consistency with other error
messages.

> +            blk->name);
>          abort();
>      }
>  }
> @@ -1143,6 +1146,7 @@ BlockErrorAction blk_get_error_action(BlockBackend 
> *blk, bool is_read,
>      case BLOCKDEV_ON_ERROR_IGNORE:
>          return BLOCK_ERROR_ACTION_IGNORE;
>      default:
> +        error_report("Unrecognized Block Error Action %d. Aborting.",on_err);

s/,/, /

Please use scripts/checkpatch.pl to check for coding style violations.

> diff --git a/exec.c b/exec.c
> index c4f9036..1b1d713 100644
> --- a/exec.c
> +++ b/exec.c
> @@ -2218,6 +2218,7 @@ static MemTxResult subpage_read(void *opaque, hwaddr 
> addr, uint64_t *data,
>          *data = ldq_p(buf);
>          return MEMTX_OK;
>      default:
> +        printf("Unsupported read size %d, Aborting", len);

Why use printf() instead of error_report() in this file?

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