error_propagate_prepend() "behaves like error_prepend()", and
error_prepend() uses "formatting @fmt, ... like printf()".
error_prepend() checks its format string argument, but
error_propagate_prepend() does not. Fix by addint the format
attribute to error_propagate_prepend() and error_vprepend().
This would have caught the bug fixed in the previous commit:
CC hw/sd/milkymist-memcard.o
hw/sd/milkymist-memcard.c: In function ‘milkymist_memcard_realize’:
hw/sd/milkymist-memcard.c:284:70: error: format ‘%s’ expects a matching ‘char *’ argument [-Werror=format=]
284 | error_propagate_prepend(errp, err, "failed to init SD card: %s");
| ~^
| |
| char *
Missed in commit 4b5766488f "error: Fix use of error_prepend() with
&error_fatal, &error_abort".
Inspired-by: Stefan Weil <sw@weilnetz.de>
Suggested-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
---
Since v1:
- Reword (Markus)
- Add error_vprepend (Stefan)
- Use local style to add the attribute *after* the declaration,
which is invalid on definition where we get (depending on the
toolchain):
. error: attributes should be specified before the declarator in a function definition
. error: attributes are not allowed on a function-definition
Supersedes: <20200723091309.18690-1-philmd@redhat.com>
---
include/qapi/error.h | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/include/qapi/error.h b/include/qapi/error.h
index 7932594dce..eaa05c4837 100644
--- a/include/qapi/error.h
+++ b/include/qapi/error.h
@@ -382,13 +382,15 @@ void error_propagate(Error **dst_errp, Error *local_err);
* Please use ERRP_GUARD() and error_prepend() instead when possible.
*/
void error_propagate_prepend(Error **dst_errp, Error *local_err,
- const char *fmt, ...);
+ const char *fmt, ...)
+ GCC_FMT_ATTR(3, 4);
/*
* Prepend some text to @errp's human-readable error message.
* The text is made by formatting @fmt, @ap like vprintf().
*/
-void error_vprepend(Error *const *errp, const char *fmt, va_list ap);
+void error_vprepend(Error *const *errp, const char *fmt, va_list ap)
+ GCC_FMT_ATTR(2, 0);
/*
* Prepend some text to @errp's human-readable error message.
--
2.21.3
Philippe Mathieu-Daudé <philmd@redhat.com> writes: > error_propagate_prepend() "behaves like error_prepend()", and > error_prepend() uses "formatting @fmt, ... like printf()". > error_prepend() checks its format string argument, but > error_propagate_prepend() does not. Fix by addint the format s/addint/adding/ > attribute to error_propagate_prepend() and error_vprepend(). > > This would have caught the bug fixed in the previous commit: > > CC hw/sd/milkymist-memcard.o > hw/sd/milkymist-memcard.c: In function ‘milkymist_memcard_realize’: > hw/sd/milkymist-memcard.c:284:70: error: format ‘%s’ expects a matching ‘char *’ argument [-Werror=format=] > 284 | error_propagate_prepend(errp, err, "failed to init SD card: %s"); > | ~^ > | | > | char * I see no need to repeat the details here. If you agree, I'll drop them in my tree. > Missed in commit 4b5766488f "error: Fix use of error_prepend() with > &error_fatal, &error_abort". > > Inspired-by: Stefan Weil <sw@weilnetz.de> > Suggested-by: Eric Blake <eblake@redhat.com> > Reviewed-by: Markus Armbruster <armbru@redhat.com> > Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Markus Armbruster <armbru@redhat.com>
On 7/24/20 10:03 AM, Markus Armbruster wrote: > Philippe Mathieu-Daudé <philmd@redhat.com> writes: > >> error_propagate_prepend() "behaves like error_prepend()", and >> error_prepend() uses "formatting @fmt, ... like printf()". >> error_prepend() checks its format string argument, but >> error_propagate_prepend() does not. Fix by addint the format > > s/addint/adding/ > >> attribute to error_propagate_prepend() and error_vprepend(). >> >> This would have caught the bug fixed in the previous commit: >> >> CC hw/sd/milkymist-memcard.o >> hw/sd/milkymist-memcard.c: In function ‘milkymist_memcard_realize’: >> hw/sd/milkymist-memcard.c:284:70: error: format ‘%s’ expects a matching ‘char *’ argument [-Werror=format=] >> 284 | error_propagate_prepend(errp, err, "failed to init SD card: %s"); >> | ~^ >> | | >> | char * > > I see no need to repeat the details here. If you agree, I'll drop them > in my tree. OK, thanks. > >> Missed in commit 4b5766488f "error: Fix use of error_prepend() with >> &error_fatal, &error_abort". >> >> Inspired-by: Stefan Weil <sw@weilnetz.de> >> Suggested-by: Eric Blake <eblake@redhat.com> >> Reviewed-by: Markus Armbruster <armbru@redhat.com> >> Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> > > Reviewed-by: Markus Armbruster <armbru@redhat.com> >
Philippe Mathieu-Daudé <philmd@redhat.com> writes: > error_propagate_prepend() "behaves like error_prepend()", and > error_prepend() uses "formatting @fmt, ... like printf()". > error_prepend() checks its format string argument, but > error_propagate_prepend() does not. Fix by addint the format > attribute to error_propagate_prepend() and error_vprepend(). > > This would have caught the bug fixed in the previous commit: > > CC hw/sd/milkymist-memcard.o > hw/sd/milkymist-memcard.c: In function ‘milkymist_memcard_realize’: > hw/sd/milkymist-memcard.c:284:70: error: format ‘%s’ expects a matching ‘char *’ argument [-Werror=format=] > 284 | error_propagate_prepend(errp, err, "failed to init SD card: %s"); > | ~^ > | | > | char * > > Missed in commit 4b5766488f "error: Fix use of error_prepend() with > &error_fatal, &error_abort". > > Inspired-by: Stefan Weil <sw@weilnetz.de> > Suggested-by: Eric Blake <eblake@redhat.com> > Reviewed-by: Markus Armbruster <armbru@redhat.com> > Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com> > --- > Since v1: > - Reword (Markus) > - Add error_vprepend (Stefan) > - Use local style to add the attribute *after* the declaration, > which is invalid on definition where we get (depending on the > toolchain): > > . error: attributes should be specified before the declarator in a function definition > > . error: attributes are not allowed on a function-definition > > Supersedes: <20200723091309.18690-1-philmd@redhat.com> Queued with Stefan's R-by from v1. Hope what's okay. Thanks!
© 2016 - 2024 Red Hat, Inc.