+/*
+ * Error reporting
+ *
+ * Copyright (C) 2010 Red Hat Inc.
+ *
+ * Authors:
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or later.
+ * See the COPYING file in the top-level directory.
+ */
+
#include <stdio.h>
#include "monitor.h"
-#include "sysemu.h"
-
-typedef struct QemuErrorSink QemuErrorSink;
-struct QemuErrorSink {
- enum {
- ERR_SINK_FILE,
- ERR_SINK_MONITOR,
- } dest;
- union {
- FILE *fp;
- Monitor *mon;
- };
- QemuErrorSink *previous;
+
+/*
+ * Print to current monitor if we have one, else to stderr.
+ * TODO should return int, so callers can calculate width, but that
+ * requires surgery to monitor_vprintf(). Left for another day.
+ */
+void error_vprintf(const char *fmt, va_list ap)
+{
+ if (cur_mon) {
+ monitor_vprintf(cur_mon, fmt, ap);
+ } else {
+ vfprintf(stderr, fmt, ap);
+ }
+}
+
+/*
+ * Print to current monitor if we have one, else to stderr.
+ * TODO just like error_vprintf()
+ */
+void error_printf(const char *fmt, ...)
+{
+ va_list ap;
+
+ va_start(ap, fmt);
+ error_vprintf(fmt, ap);
+ va_end(ap);
+}
+
+void error_printf_unless_qmp(const char *fmt, ...)
+{
+ va_list ap;
+
+ if (!monitor_cur_is_qmp()) {
+ va_start(ap, fmt);
+ error_vprintf(fmt, ap);
+ va_end(ap);
+ }
+}
+
+static Location std_loc = {
+ .kind = LOC_NONE
};
+static Location *cur_loc = &std_loc;
-static QemuErrorSink *qemu_error_sink;
+/*
+ * Push location saved in LOC onto the location stack, return it.
+ * The top of that stack is the current location.
+ * Needs a matching loc_pop().
+ */
+Location *loc_push_restore(Location *loc)
+{
+ assert(!loc->prev);
+ loc->prev = cur_loc;
+ cur_loc = loc;
+ return loc;
+}
-void qemu_errors_to_file(FILE *fp)
+/*
+ * Initialize *LOC to "nowhere", push it onto the location stack.
+ * The top of that stack is the current location.
+ * Needs a matching loc_pop().
+ * Return LOC.
+ */
+Location *loc_push_none(Location *loc)
{
- QemuErrorSink *sink;
+ loc->kind = LOC_NONE;
+ loc->prev = NULL;
+ return loc_push_restore(loc);
+}
- sink = qemu_mallocz(sizeof(*sink));
- sink->dest = ERR_SINK_FILE;
- sink->fp = fp;
- sink->previous = qemu_error_sink;
- qemu_error_sink = sink;
+/*
+ * Pop the location stack.
+ * LOC must be the current location, i.e. the top of the stack.
+ */
+Location *loc_pop(Location *loc)
+{
+ assert(cur_loc == loc && loc->prev);
+ cur_loc = loc->prev;
+ loc->prev = NULL;
+ return loc;
}
-void qemu_errors_to_mon(Monitor *mon)
+/*
+ * Save the current location in LOC, return LOC.
+ */
+Location *loc_save(Location *loc)
{
- QemuErrorSink *sink;
+ *loc = *cur_loc;
+ loc->prev = NULL;
+ return loc;
+}
- sink = qemu_mallocz(sizeof(*sink));
- sink->dest = ERR_SINK_MONITOR;
- sink->mon = mon;
- sink->previous = qemu_error_sink;
- qemu_error_sink = sink;
+/*
+ * Change the current location to the one saved in LOC.
+ */
+void loc_restore(Location *loc)
+{
+ Location *prev = cur_loc->prev;
+ assert(!loc->prev);
+ *cur_loc = *loc;
+ cur_loc->prev = prev;
}
-void qemu_errors_to_previous(void)
+/*
+ * Change the current location to "nowhere in particular".
+ */
+void loc_set_none(void)
{
- QemuErrorSink *sink;
+ cur_loc->kind = LOC_NONE;
+}
- assert(qemu_error_sink != NULL);
- sink = qemu_error_sink;
- qemu_error_sink = sink->previous;
- qemu_free(sink);
+/*
+ * Change the current location to argument ARGV[IDX..IDX+CNT-1].
+ */
+void loc_set_cmdline(char **argv, int idx, int cnt)
+{
+ cur_loc->kind = LOC_CMDLINE;
+ cur_loc->num = cnt;
+ cur_loc->ptr = argv + idx;
}
-void qemu_error(const char *fmt, ...)
+/*
+ * Change the current location to file FNAME, line LNO.
+ */
+void loc_set_file(const char *fname, int lno)
{
- va_list args;
-
- assert(qemu_error_sink != NULL);
- switch (qemu_error_sink->dest) {
- case ERR_SINK_FILE:
- va_start(args, fmt);
- vfprintf(qemu_error_sink->fp, fmt, args);
- va_end(args);
- break;
- case ERR_SINK_MONITOR:
- va_start(args, fmt);
- monitor_vprintf(qemu_error_sink->mon, fmt, args);
- va_end(args);
- break;
+ assert (fname || cur_loc->kind == LOC_FILE);
+ cur_loc->kind = LOC_FILE;
+ cur_loc->num = lno;
+ if (fname) {
+ cur_loc->ptr = fname;
}
}
-void qemu_error_internal(const char *file, int linenr, const char *func,
- const char *fmt, ...)
-{
- va_list va;
- QError *qerror;
+static const char *progname;
- assert(qemu_error_sink != NULL);
+/*
+ * Set the program name for error_print_loc().
+ */
+void error_set_progname(const char *argv0)
+{
+ const char *p = strrchr(argv0, '/');
+ progname = p ? p + 1 : argv0;
+}
- va_start(va, fmt);
- qerror = qerror_from_info(file, linenr, func, fmt, &va);
- va_end(va);
+/*
+ * Print current location to current monitor if we have one, else to stderr.
+ */
+void error_print_loc(void)
+{
+ const char *sep = "";
+ int i;
+ const char *const *argp;
- switch (qemu_error_sink->dest) {
- case ERR_SINK_FILE:
- qerror_print(qerror);
- QDECREF(qerror);
+ if (!cur_mon && progname) {
+ fprintf(stderr, "%s:", progname);
+ sep = " ";
+ }
+ switch (cur_loc->kind) {
+ case LOC_CMDLINE:
+ argp = cur_loc->ptr;
+ for (i = 0; i < cur_loc->num; i++) {
+ error_printf("%s%s", sep, argp[i]);
+ sep = " ";
+ }
+ error_printf(": ");
break;
- case ERR_SINK_MONITOR:
- monitor_set_error(qemu_error_sink->mon, qerror);
+ case LOC_FILE:
+ error_printf("%s:", (const char *)cur_loc->ptr);
+ if (cur_loc->num) {
+ error_printf("%d:", cur_loc->num);
+ }
+ error_printf(" ");
break;
+ default:
+ error_printf("%s", sep);
}
}
+
+/*
+ * Print an error message to current monitor if we have one, else to stderr.
+ * Prepend the current location and append a newline.
+ * It's wrong to call this in a QMP monitor. Use qerror_report() there.
+ */
+void error_report(const char *fmt, ...)
+{
+ va_list ap;
+
+ error_print_loc();
+ va_start(ap, fmt);
+ error_vprintf(fmt, ap);
+ va_end(ap);
+ error_printf("\n");
+}
projects / qemu.git / blobdiff