Merge remote-tracking branch 'remotes/armbru/tags/for-upstream' into staging
[qemu.git] / qemu-log.c
1 /*
2 * Logging support
3 *
4 * Copyright (c) 2003 Fabrice Bellard
5 *
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
10 *
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with this library; if not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "qemu-common.h"
21 #include "qemu/log.h"
22
23 static char *logfilename;
24 FILE *qemu_logfile;
25 int qemu_loglevel;
26 static int log_append = 0;
27
28 void qemu_log(const char *fmt, ...)
29 {
30 va_list ap;
31
32 va_start(ap, fmt);
33 if (qemu_logfile) {
34 vfprintf(qemu_logfile, fmt, ap);
35 }
36 va_end(ap);
37 }
38
39 void qemu_log_mask(int mask, const char *fmt, ...)
40 {
41 va_list ap;
42
43 va_start(ap, fmt);
44 if ((qemu_loglevel & mask) && qemu_logfile) {
45 vfprintf(qemu_logfile, fmt, ap);
46 }
47 va_end(ap);
48 }
49
50 /* enable or disable low levels log */
51 void do_qemu_set_log(int log_flags, bool use_own_buffers)
52 {
53 qemu_loglevel = log_flags;
54 if (qemu_loglevel && !qemu_logfile) {
55 if (logfilename) {
56 qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
57 if (!qemu_logfile) {
58 perror(logfilename);
59 _exit(1);
60 }
61 } else {
62 /* Default to stderr if no log file specified */
63 qemu_logfile = stderr;
64 }
65 /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
66 if (use_own_buffers) {
67 static char logfile_buf[4096];
68
69 setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
70 } else {
71 #if defined(_WIN32)
72 /* Win32 doesn't support line-buffering, so use unbuffered output. */
73 setvbuf(qemu_logfile, NULL, _IONBF, 0);
74 #else
75 setvbuf(qemu_logfile, NULL, _IOLBF, 0);
76 #endif
77 log_append = 1;
78 }
79 }
80 if (!qemu_loglevel && qemu_logfile) {
81 qemu_log_close();
82 }
83 }
84
85 void qemu_set_log_filename(const char *filename)
86 {
87 g_free(logfilename);
88 logfilename = g_strdup(filename);
89 qemu_log_close();
90 qemu_set_log(qemu_loglevel);
91 }
92
93 const QEMULogItem qemu_log_items[] = {
94 { CPU_LOG_TB_OUT_ASM, "out_asm",
95 "show generated host assembly code for each compiled TB" },
96 { CPU_LOG_TB_IN_ASM, "in_asm",
97 "show target assembly code for each compiled TB" },
98 { CPU_LOG_TB_OP, "op",
99 "show micro ops for each compiled TB" },
100 { CPU_LOG_TB_OP_OPT, "op_opt",
101 "show micro ops (x86 only: before eflags optimization) and\n"
102 "after liveness analysis" },
103 { CPU_LOG_INT, "int",
104 "show interrupts/exceptions in short format" },
105 { CPU_LOG_EXEC, "exec",
106 "show trace before each executed TB (lots of logs)" },
107 { CPU_LOG_TB_CPU, "cpu",
108 "show CPU state before block translation" },
109 { CPU_LOG_PCALL, "pcall",
110 "x86 only: show protected mode far calls/returns/exceptions" },
111 { CPU_LOG_RESET, "cpu_reset",
112 "x86 only: show CPU state before CPU resets" },
113 { CPU_LOG_IOPORT, "ioport",
114 "show all i/o ports accesses" },
115 { LOG_UNIMP, "unimp",
116 "log unimplemented functionality" },
117 { LOG_GUEST_ERROR, "guest_errors",
118 "log when the guest OS does something invalid (eg accessing a\n"
119 "non-existent register)" },
120 { 0, NULL, NULL },
121 };
122
123 static int cmp1(const char *s1, int n, const char *s2)
124 {
125 if (strlen(s2) != n) {
126 return 0;
127 }
128 return memcmp(s1, s2, n) == 0;
129 }
130
131 /* takes a comma separated list of log masks. Return 0 if error. */
132 int qemu_str_to_log_mask(const char *str)
133 {
134 const QEMULogItem *item;
135 int mask;
136 const char *p, *p1;
137
138 p = str;
139 mask = 0;
140 for (;;) {
141 p1 = strchr(p, ',');
142 if (!p1) {
143 p1 = p + strlen(p);
144 }
145 if (cmp1(p,p1-p,"all")) {
146 for (item = qemu_log_items; item->mask != 0; item++) {
147 mask |= item->mask;
148 }
149 } else {
150 for (item = qemu_log_items; item->mask != 0; item++) {
151 if (cmp1(p, p1 - p, item->name)) {
152 goto found;
153 }
154 }
155 return 0;
156 }
157 found:
158 mask |= item->mask;
159 if (*p1 != ',') {
160 break;
161 }
162 p = p1 + 1;
163 }
164 return mask;
165 }
166
167 void qemu_print_log_usage(FILE *f)
168 {
169 const QEMULogItem *item;
170 fprintf(f, "Log items (comma separated):\n");
171 for (item = qemu_log_items; item->mask != 0; item++) {
172 fprintf(f, "%-10s %s\n", item->name, item->help);
173 }
174 }