qemu/util/error.c
Peter Crosthwaite 732c66ce64 Revert "error: Don't use error_report() for assertion msgs."
This reverts commit d32934c84c.

The original implementation before this patch makes abortive error
messages much more friendly. The underlying bug that required this
change is now fixed. Revert.

Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com>
Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2014-01-17 09:50:11 +10:00

182 lines
3.5 KiB
C

/*
* QEMU Error Objects
*
* Copyright IBM, Corp. 2011
*
* Authors:
* Anthony Liguori <aliguori@us.ibm.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 "qapi/error.h"
#include "qapi/qmp/qjson.h"
#include "qapi/qmp/qdict.h"
#include "qapi-types.h"
#include "qapi/qmp/qerror.h"
struct Error
{
char *msg;
ErrorClass err_class;
};
Error *error_abort;
void error_set(Error **errp, ErrorClass err_class, const char *fmt, ...)
{
Error *err;
va_list ap;
int saved_errno = errno;
if (errp == NULL) {
return;
}
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("%s", error_get_pretty(err));
abort();
}
*errp = err;
errno = saved_errno;
}
void error_set_errno(Error **errp, int os_errno, ErrorClass err_class,
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;
}
va_end(ap);
err->err_class = err_class;
if (errp == &error_abort) {
error_report("%s", error_get_pretty(err));
abort();
}
*errp = err;
errno = saved_errno;
}
void error_setg_file_open(Error **errp, int os_errno, const char *filename)
{
error_setg_errno(errp, os_errno, "Could not open '%s'", filename);
}
#ifdef _WIN32
void error_set_win32(Error **errp, int win32_err, ErrorClass err_class,
const char *fmt, ...)
{
Error *err;
char *msg1;
va_list ap;
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;
}
va_end(ap);
err->err_class = err_class;
if (errp == &error_abort) {
error_report("%s", error_get_pretty(err));
abort();
}
*errp = err;
}
#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;
return err_new;
}
bool error_is_set(Error **errp)
{
return (errp && *errp);
}
ErrorClass error_get_class(const Error *err)
{
return err->err_class;
}
const char *error_get_pretty(Error *err)
{
return err->msg;
}
void error_free(Error *err)
{
if (err) {
g_free(err->msg);
g_free(err);
}
}
void error_propagate(Error **dst_err, Error *local_err)
{
if (local_err && dst_err == &error_abort) {
error_report("%s", error_get_pretty(local_err));
abort();
} else if (dst_err && !*dst_err) {
*dst_err = local_err;
} else if (local_err) {
error_free(local_err);
}
}