From d561d28827ec1b3ea4d79660a5ed75f4e24db4bf Mon Sep 17 00:00:00 2001 From: "Daniel P. Berrange" Date: Wed, 21 Feb 2018 21:39:59 -0500 Subject: [PATCH] error: ensure errno detail is printed with error_abort When &error_abort is passed in, the error reporting code will print the current error message and then abort() the process. Unfortunately at the time it aborts, we've not yet appended the errno detail. This makes debugging certain problems significantly harder as the log is incomplete. Backports commit 20e2dec14954568848ad74e73aee9b3aeedd6584 from qemu --- qemu/util/error.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/qemu/util/error.c b/qemu/util/error.c index a4d7a083..061ff003 100644 --- a/qemu/util/error.c +++ b/qemu/util/error.c @@ -46,7 +46,8 @@ static void error_handle_fatal(Error **errp, Error *err) static void error_setv(Error **errp, const char *src, int line, const char *func, - ErrorClass err_class, const char *fmt, va_list ap) + ErrorClass err_class, const char *fmt, va_list ap, + const char *suffix) { Error *err; int saved_errno = errno; @@ -59,6 +60,11 @@ static void error_setv(Error **errp, err = g_malloc0(sizeof(*err)); err->msg = g_strdup_vprintf(fmt, ap); + if (suffix) { + char *msg = err->msg; + err->msg = g_strdup_printf("%s: %s", msg, suffix); + g_free(msg); + } err->err_class = err_class; err->src = src; err->line = line; @@ -77,7 +83,7 @@ void error_set_internal(Error **errp, va_list ap; va_start(ap, fmt); - error_setv(errp, src, line, func, err_class, fmt, ap); + error_setv(errp, src, line, func, err_class, fmt, ap, NULL); va_end(ap); } @@ -88,7 +94,7 @@ void error_setg_internal(Error **errp, va_list ap; va_start(ap, fmt); - error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap); + error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap, NULL); va_end(ap); } @@ -97,7 +103,6 @@ void error_setg_errno_internal(Error **errp, int os_errno, const char *fmt, ...) { va_list ap; - char *msg; int saved_errno = errno; if (errp == NULL) { @@ -105,15 +110,10 @@ void error_setg_errno_internal(Error **errp, } va_start(ap, fmt); - error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap); + error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap, + os_errno != 0 ? strerror(os_errno) : NULL); va_end(ap); - if (os_errno != 0) { - msg = (*errp)->msg; - (*errp)->msg = g_strdup_printf("%s: %s", msg, strerror(os_errno)); - g_free(msg); - } - errno = saved_errno; }