* QEMU Error Objects
*
* Copyright IBM, Corp. 2011
+ * Copyright (C) 2011-2015 Red Hat, Inc.
*
* Authors:
*
* 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
ErrorClass err_class;
const char *src, *func;
int line;
+ GString *hint;
};
Error *error_abort;
+Error *error_fatal;
-static void error_do_abort(Error *err)
+static void error_handle_fatal(Error **errp, Error *err)
{
- fprintf(stderr, "Unexpected error in %s() at %s:%d:\n",
- err->func, err->src, err->line);
- error_report_err(err);
- abort();
+ 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);
+ }
}
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;
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;
err->func = func;
- if (errp == &error_abort) {
- error_do_abort(err);
- }
-
+ error_handle_fatal(errp, err);
*errp = err;
errno = saved_errno;
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);
}
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);
}
int os_errno, const char *fmt, ...)
{
va_list ap;
- char *msg;
int saved_errno = errno;
if (errp == NULL) {
}
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;
}
"Could not open '%s'", filename);
}
+void error_vprepend(Error **errp, const char *fmt, va_list ap)
+{
+ GString *newmsg;
+
+ if (!errp) {
+ return;
+ }
+
+ newmsg = g_string_new(NULL);
+ g_string_vprintf(newmsg, fmt, ap);
+ g_string_append(newmsg, (*errp)->msg);
+ g_free((*errp)->msg);
+ (*errp)->msg = g_string_free(newmsg, 0);
+}
+
+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_append_hint(Error **errp, const char *fmt, ...)
+{
+ 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_setg_win32_internal(Error **errp,
int win32_err, const char *fmt, ...)
{
va_list ap;
- char *msg1, *msg2;
+ char *suffix = NULL;
if (errp == NULL) {
return;
}
+ if (win32_err != 0) {
+ suffix = g_win32_error_message(win32_err);
+ }
+
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, suffix);
va_end(ap);
- if (win32_err != 0) {
- msg1 = (*errp)->msg;
- msg2 = g_win32_error_message(win32_err);
- (*errp)->msg = g_strdup_printf("%s: %s (error: %x)", msg1, msg2,
- (unsigned)win32_err);
- g_free(msg2);
- g_free(msg1);
- }
+ 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;
}
return err->err_class;
}
-const char *error_get_pretty(Error *err)
+const char *error_get_pretty(const Error *err)
{
return err->msg;
}
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 warn_report_err(Error *err)
+{
+ warn_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 warn_reportf_err(Error *err, const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_vprepend(&err, fmt, ap);
+ va_end(ap);
+ warn_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_do_abort(local_err);
- } 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);
}
}
projects / qemu.git / blobdiff