| /* |
| * 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/osdep.h" |
| #include "qapi/error.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("%s", error_get_pretty(err)); |
| if (err->hint) { |
| error_printf("%s", err->hint->str); |
| } |
| 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, |
| const char *suffix) |
| { |
| Error *err; |
| int saved_errno = errno; |
| |
| if (errp == NULL) { |
| return; |
| } |
| assert(*errp == NULL); |
| |
| 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; |
| |
| error_handle_fatal(errp, err); |
| *errp = err; |
| |
| errno = saved_errno; |
| } |
| |
| 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, ...) |
| { |
| va_list ap; |
| int saved_errno = errno; |
| |
| va_start(ap, fmt); |
| error_setv(errp, src, line, func, ERROR_CLASS_GENERIC_ERROR, fmt, ap, |
| os_errno != 0 ? strerror(os_errno) : NULL); |
| va_end(ap); |
| |
| 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; |
| } |
| |
| 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, |
| const char *src, int line, const char *func, |
| int win32_err, const char *fmt, ...) |
| { |
| va_list ap; |
| 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, suffix); |
| va_end(ap); |
| |
| g_free(suffix); |
| } |
| |
| #endif |
| |
| Error *error_copy(const Error *err) |
| { |
| Error *err_new; |
| |
| 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; |
| } |
| |
| ErrorClass error_get_class(const Error *err) |
| { |
| return err->err_class; |
| } |
| |
| 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("%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("%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) { |
| return; |
| } |
| error_handle_fatal(dst_errp, local_err); |
| if (dst_errp && !*dst_errp) { |
| *dst_errp = local_err; |
| } else { |
| error_free(local_err); |
| } |
| } |
| |
| void error_propagate_prepend(Error **dst_errp, Error *err, |
| const char *fmt, ...) |
| { |
| va_list ap; |
| |
| if (dst_errp && !*dst_errp) { |
| va_start(ap, fmt); |
| error_vprepend(&err, fmt, ap); |
| va_end(ap); |
| } /* else error is being ignored, don't bother with prepending */ |
| error_propagate(dst_errp, err); |
| } |