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ba0fe87a MA |
1 | /* |
2 | * Error reporting | |
3 | * | |
4 | * Copyright (C) 2010 Red Hat Inc. | |
5 | * | |
6 | * Authors: | |
7 | * Markus Armbruster <armbru@redhat.com>, | |
8 | * | |
9 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
10 | * See the COPYING file in the top-level directory. | |
11 | */ | |
12 | ||
b4a51f7f MA |
13 | #include <stdio.h> |
14 | #include "monitor.h" | |
15 | #include "sysemu.h" | |
16 | ||
ba0fe87a MA |
17 | /* |
18 | * Print to current monitor if we have one, else to stderr. | |
19 | * TODO should return int, so callers can calculate width, but that | |
20 | * requires surgery to monitor_vprintf(). Left for another day. | |
21 | */ | |
22 | void error_vprintf(const char *fmt, va_list ap) | |
b4a51f7f | 23 | { |
6e4f984c | 24 | if (cur_mon) { |
ba0fe87a | 25 | monitor_vprintf(cur_mon, fmt, ap); |
6e4f984c | 26 | } else { |
ba0fe87a | 27 | vfprintf(stderr, fmt, ap); |
b4a51f7f | 28 | } |
ba0fe87a MA |
29 | } |
30 | ||
31 | /* | |
32 | * Print to current monitor if we have one, else to stderr. | |
33 | * TODO just like error_vprintf() | |
34 | */ | |
35 | void error_printf(const char *fmt, ...) | |
36 | { | |
37 | va_list ap; | |
38 | ||
39 | va_start(ap, fmt); | |
40 | error_vprintf(fmt, ap); | |
41 | va_end(ap); | |
42 | } | |
43 | ||
827b0813 MA |
44 | static Location std_loc = { |
45 | .kind = LOC_NONE | |
46 | }; | |
47 | static Location *cur_loc = &std_loc; | |
48 | ||
49 | /* | |
50 | * Push location saved in LOC onto the location stack, return it. | |
51 | * The top of that stack is the current location. | |
52 | * Needs a matching loc_pop(). | |
53 | */ | |
54 | Location *loc_push_restore(Location *loc) | |
55 | { | |
56 | assert(!loc->prev); | |
57 | loc->prev = cur_loc; | |
58 | cur_loc = loc; | |
59 | return loc; | |
60 | } | |
61 | ||
62 | /* | |
63 | * Initialize *LOC to "nowhere", push it onto the location stack. | |
64 | * The top of that stack is the current location. | |
65 | * Needs a matching loc_pop(). | |
66 | * Return LOC. | |
67 | */ | |
68 | Location *loc_push_none(Location *loc) | |
69 | { | |
70 | loc->kind = LOC_NONE; | |
71 | loc->prev = NULL; | |
72 | return loc_push_restore(loc); | |
73 | } | |
74 | ||
75 | /* | |
76 | * Pop the location stack. | |
77 | * LOC must be the current location, i.e. the top of the stack. | |
78 | */ | |
79 | Location *loc_pop(Location *loc) | |
80 | { | |
81 | assert(cur_loc == loc && loc->prev); | |
82 | cur_loc = loc->prev; | |
83 | loc->prev = NULL; | |
84 | return loc; | |
85 | } | |
86 | ||
87 | /* | |
88 | * Save the current location in LOC, return LOC. | |
89 | */ | |
90 | Location *loc_save(Location *loc) | |
91 | { | |
92 | *loc = *cur_loc; | |
93 | loc->prev = NULL; | |
94 | return loc; | |
95 | } | |
96 | ||
97 | /* | |
98 | * Change the current location to the one saved in LOC. | |
99 | */ | |
100 | void loc_restore(Location *loc) | |
101 | { | |
102 | Location *prev = cur_loc->prev; | |
103 | assert(!loc->prev); | |
104 | *cur_loc = *loc; | |
105 | cur_loc->prev = prev; | |
106 | } | |
107 | ||
108 | /* | |
109 | * Change the current location to "nowhere in particular". | |
110 | */ | |
111 | void loc_set_none(void) | |
112 | { | |
113 | cur_loc->kind = LOC_NONE; | |
114 | } | |
115 | ||
0f0bc3f1 MA |
116 | /* |
117 | * Change the current location to argument ARGV[IDX..IDX+CNT-1]. | |
118 | */ | |
119 | void loc_set_cmdline(char **argv, int idx, int cnt) | |
120 | { | |
121 | cur_loc->kind = LOC_CMDLINE; | |
122 | cur_loc->num = cnt; | |
123 | cur_loc->ptr = argv + idx; | |
124 | } | |
125 | ||
cf5a65aa MA |
126 | /* |
127 | * Change the current location to file FNAME, line LNO. | |
128 | */ | |
129 | void loc_set_file(const char *fname, int lno) | |
130 | { | |
131 | assert (fname || cur_loc->kind == LOC_FILE); | |
132 | cur_loc->kind = LOC_FILE; | |
133 | cur_loc->num = lno; | |
134 | if (fname) { | |
135 | cur_loc->ptr = fname; | |
136 | } | |
137 | } | |
138 | ||
65abca0a MA |
139 | static const char *progname; |
140 | ||
141 | /* | |
142 | * Set the program name for error_print_loc(). | |
143 | */ | |
144 | void error_set_progname(const char *argv0) | |
145 | { | |
146 | const char *p = strrchr(argv0, '/'); | |
147 | progname = p ? p + 1 : argv0; | |
148 | } | |
149 | ||
827b0813 MA |
150 | /* |
151 | * Print current location to current monitor if we have one, else to stderr. | |
152 | */ | |
153 | void error_print_loc(void) | |
154 | { | |
65abca0a | 155 | const char *sep = ""; |
0f0bc3f1 MA |
156 | int i; |
157 | const char *const *argp; | |
65abca0a MA |
158 | |
159 | if (!cur_mon) { | |
160 | fprintf(stderr, "%s:", progname); | |
161 | sep = " "; | |
162 | } | |
827b0813 | 163 | switch (cur_loc->kind) { |
0f0bc3f1 MA |
164 | case LOC_CMDLINE: |
165 | argp = cur_loc->ptr; | |
166 | for (i = 0; i < cur_loc->num; i++) { | |
167 | error_printf("%s%s", sep, argp[i]); | |
168 | sep = " "; | |
169 | } | |
170 | error_printf(": "); | |
171 | break; | |
cf5a65aa MA |
172 | case LOC_FILE: |
173 | error_printf("%s:", (const char *)cur_loc->ptr); | |
174 | if (cur_loc->num) { | |
175 | error_printf("%d:", cur_loc->num); | |
176 | } | |
177 | error_printf(" "); | |
178 | break; | |
65abca0a MA |
179 | default: |
180 | error_printf(sep); | |
827b0813 MA |
181 | } |
182 | } | |
183 | ||
1ecda02b MA |
184 | /* |
185 | * Print an error message to current monitor if we have one, else to stderr. | |
827b0813 | 186 | * Prepend the current location and append a newline. |
ab5b027e | 187 | * It's wrong to call this in a QMP monitor. Use qerror_report() there. |
1ecda02b MA |
188 | */ |
189 | void error_report(const char *fmt, ...) | |
ba0fe87a MA |
190 | { |
191 | va_list ap; | |
192 | ||
827b0813 | 193 | error_print_loc(); |
ba0fe87a MA |
194 | va_start(ap, fmt); |
195 | error_vprintf(fmt, ap); | |
196 | va_end(ap); | |
1ecda02b | 197 | error_printf("\n"); |
b4a51f7f MA |
198 | } |
199 | ||
ab5b027e MA |
200 | void qerror_report_internal(const char *file, int linenr, const char *func, |
201 | const char *fmt, ...) | |
b4a51f7f MA |
202 | { |
203 | va_list va; | |
204 | QError *qerror; | |
205 | ||
b4a51f7f MA |
206 | va_start(va, fmt); |
207 | qerror = qerror_from_info(file, linenr, func, fmt, &va); | |
208 | va_end(va); | |
209 | ||
cde0fc75 | 210 | if (monitor_cur_is_qmp()) { |
6e4f984c MA |
211 | monitor_set_error(cur_mon, qerror); |
212 | } else { | |
b4a51f7f MA |
213 | qerror_print(qerror); |
214 | QDECREF(qerror); | |
b4a51f7f MA |
215 | } |
216 | } |