* QEMU Error Objects
*
* Copyright IBM, Corp. 2011
+ * Copyright (C) 2011-2015 Red Hat, Inc.
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.com>
+ * Markus Armbruster <armbru@redhat.com>,
*
* This work is licensed under the terms of the GNU LGPL, version 2. See
* the COPYING.LIB file in the top-level directory.
*/
-#include "qemu-common.h"
+#include "qemu/osdep.h"
#include "qapi/error.h"
+#include "qemu-common.h"
#include "qemu/error-report.h"
struct Error
{
char *msg;
ErrorClass err_class;
+ const char *src, *func;
+ int line;
+ GString *hint;
};
Error *error_abort;
+Error *error_fatal;
+
+static void error_handle_fatal(Error **errp, Error *err)
+{
+ if (errp == &error_abort) {
+ fprintf(stderr, "Unexpected error in %s() at %s:%d:\n",
+ err->func, err->src, err->line);
+ error_report_err(err);
+ abort();
+ }
+ if (errp == &error_fatal) {
+ error_report_err(err);
+ exit(1);
+ }
+}
-void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
+static void error_setv(Error **errp,
+ const char *src, int line, const char *func,
+ ErrorClass err_class, const char *fmt, va_list ap,
+ const char *suffix)
{
Error *err;
- va_list ap;
int saved_errno = errno;
if (errp == NULL) {
assert(*errp == NULL);
err = g_malloc0(sizeof(*err));
-
- va_start(ap, fmt);
err->msg = g_strdup_vprintf(fmt, ap);
- va_end(ap);
- err->err_class = err_class;
-
- if (errp == &error_abort) {
- error_report_err(err);
- abort();
+ 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;
+ err->func = func;
+ error_handle_fatal(errp, err);
*errp = err;
errno = saved_errno;
}
-void error_set_errno(Error **errp, int os_errno, ErrorClass err_class,
- const char *fmt, ...)
+void error_set_internal(Error **errp,
+ const char *src, int line, const char *func,
+ ErrorClass err_class, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_setv(errp, src, line, func, err_class, fmt, ap, NULL);
+ va_end(ap);
+}
+
+void error_setg_internal(Error **errp,
+ const char *src, int line, const char *func,
+ const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap, NULL);
+ va_end(ap);
+}
+
+void error_setg_errno_internal(Error **errp,
+ const char *src, int line, const char *func,
+ int os_errno, const char *fmt, ...)
{
- Error *err;
- char *msg1;
va_list ap;
int saved_errno = errno;
if (errp == NULL) {
return;
}
- assert(*errp == NULL);
-
- err = g_malloc0(sizeof(*err));
va_start(ap, fmt);
- msg1 = g_strdup_vprintf(fmt, ap);
- if (os_errno != 0) {
- err->msg = g_strdup_printf("%s: %s", msg1, strerror(os_errno));
- g_free(msg1);
- } else {
- err->msg = msg1;
- }
+ error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap,
+ os_errno != 0 ? strerror(os_errno) : NULL);
va_end(ap);
- err->err_class = err_class;
- if (errp == &error_abort) {
- error_report_err(err);
- abort();
+ errno = saved_errno;
+}
+
+void error_setg_file_open_internal(Error **errp,
+ const char *src, int line, const char *func,
+ int os_errno, const char *filename)
+{
+ error_setg_errno_internal(errp, src, line, func, os_errno,
+ "Could not open '%s'", filename);
+}
+
+void error_vprepend(Error **errp, const char *fmt, va_list ap)
+{
+ GString *newmsg;
+
+ if (!errp) {
+ return;
}
- *errp = err;
+ newmsg = g_string_new(NULL);
+ g_string_vprintf(newmsg, fmt, ap);
+ g_string_append(newmsg, (*errp)->msg);
+ (*errp)->msg = g_string_free(newmsg, 0);
+}
- errno = saved_errno;
+void error_prepend(Error **errp, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_vprepend(errp, fmt, ap);
+ va_end(ap);
}
-void error_setg_file_open(Error **errp, int os_errno, const char *filename)
+void error_append_hint(Error **errp, const char *fmt, ...)
{
- error_setg_errno(errp, os_errno, "Could not open '%s'", filename);
+ va_list ap;
+ int saved_errno = errno;
+ Error *err;
+
+ if (!errp) {
+ return;
+ }
+ err = *errp;
+ assert(err && errp != &error_abort && errp != &error_fatal);
+
+ if (!err->hint) {
+ err->hint = g_string_new(NULL);
+ }
+ va_start(ap, fmt);
+ g_string_append_vprintf(err->hint, fmt, ap);
+ va_end(ap);
+
+ errno = saved_errno;
}
#ifdef _WIN32
-void error_set_win32(Error **errp, int win32_err, ErrorClass err_class,
- const char *fmt, ...)
+void error_setg_win32_internal(Error **errp,
+ const char *src, int line, const char *func,
+ int win32_err, const char *fmt, ...)
{
- Error *err;
- char *msg1;
va_list ap;
+ char *suffix = NULL;
if (errp == NULL) {
return;
}
- assert(*errp == NULL);
- err = g_malloc0(sizeof(*err));
-
- va_start(ap, fmt);
- msg1 = g_strdup_vprintf(fmt, ap);
if (win32_err != 0) {
- char *msg2 = g_win32_error_message(win32_err);
- err->msg = g_strdup_printf("%s: %s (error: %x)", msg1, msg2,
- (unsigned)win32_err);
- g_free(msg2);
- g_free(msg1);
- } else {
- err->msg = msg1;
+ suffix = g_win32_error_message(win32_err);
}
- va_end(ap);
- err->err_class = err_class;
- if (errp == &error_abort) {
- error_report_err(err);
- abort();
- }
+ va_start(ap, fmt);
+ error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR,
+ fmt, ap, suffix);
+ va_end(ap);
- *errp = err;
+ g_free(suffix);
}
#endif
err_new = g_malloc0(sizeof(*err));
err_new->msg = g_strdup(err->msg);
err_new->err_class = err->err_class;
+ err_new->src = err->src;
+ err_new->line = err->line;
+ err_new->func = err->func;
+ if (err->hint) {
+ err_new->hint = g_string_new(err->hint->str);
+ }
return err_new;
}
void error_report_err(Error *err)
{
error_report("%s", error_get_pretty(err));
+ if (err->hint) {
+ error_printf_unless_qmp("%s", err->hint->str);
+ }
error_free(err);
}
+void error_reportf_err(Error *err, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_vprepend(&err, fmt, ap);
+ va_end(ap);
+ error_report_err(err);
+}
+
void error_free(Error *err)
{
if (err) {
g_free(err->msg);
+ if (err->hint) {
+ g_string_free(err->hint, true);
+ }
g_free(err);
}
}
+void error_free_or_abort(Error **errp)
+{
+ assert(errp && *errp);
+ error_free(*errp);
+ *errp = NULL;
+}
+
void error_propagate(Error **dst_errp, Error *local_err)
{
- if (local_err && dst_errp == &error_abort) {
- error_report_err(local_err);
- abort();
- } else if (dst_errp && !*dst_errp) {
+ if (!local_err) {
+ return;
+ }
+ error_handle_fatal(dst_errp, local_err);
+ if (dst_errp && !*dst_errp) {
*dst_errp = local_err;
- } else if (local_err) {
+ } else {
error_free(local_err);
}
}
Code Review / kvmfornfv.git / blobdiff