4 * Copyright (c) 2003 Fabrice Bellard
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.
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.
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/>.
20 #include "qemu/osdep.h"
22 #include "qemu/range.h"
23 #include "qemu/error-report.h"
24 #include "qapi/error.h"
25 #include "qemu/cutils.h"
26 #include "trace/control.h"
28 static char *logfilename;
31 static int log_append = 0;
32 static GArray *debug_regions;
34 /* Return the number of characters emitted. */
35 int qemu_log(const char *fmt, ...)
41 ret = vfprintf(qemu_logfile, fmt, ap);
44 /* Don't pass back error results. */
52 static bool log_uses_own_buffers;
54 /* enable or disable low levels log */
55 void qemu_set_log(int log_flags)
57 bool need_to_open_file = false;
58 qemu_loglevel = log_flags;
59 #ifdef CONFIG_TRACE_LOG
60 qemu_loglevel |= LOG_TRACE;
63 * In all cases we only log if qemu_loglevel is set.
65 * If not daemonized we will always log either to stderr
66 * or to a file (if there is a logfilename).
67 * If we are daemonized,
68 * we will only log if there is a logfilename.
70 if (qemu_loglevel && (!is_daemonized() || logfilename)) {
71 need_to_open_file = true;
73 if (qemu_logfile && !need_to_open_file) {
75 } else if (!qemu_logfile && need_to_open_file) {
77 qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
82 /* In case we are a daemon redirect stderr to logfile */
83 if (is_daemonized()) {
84 dup2(fileno(qemu_logfile), STDERR_FILENO);
86 /* This will skip closing logfile in qemu_log_close() */
87 qemu_logfile = stderr;
90 /* Default to stderr if no log file specified */
91 assert(!is_daemonized());
92 qemu_logfile = stderr;
94 /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
95 if (log_uses_own_buffers) {
96 static char logfile_buf[4096];
98 setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
101 /* Win32 doesn't support line-buffering, so use unbuffered output. */
102 setvbuf(qemu_logfile, NULL, _IONBF, 0);
104 setvbuf(qemu_logfile, NULL, _IOLBF, 0);
111 void qemu_log_needs_buffers(void)
113 log_uses_own_buffers = true;
117 * Allow the user to include %d in their logfile which will be
118 * substituted with the current PID. This is useful for debugging many
119 * nested linux-user tasks but will result in lots of logs.
121 void qemu_set_log_filename(const char *filename, Error **errp)
127 pidstr = strstr(filename, "%");
129 /* We only accept one %d, no other format strings */
130 if (pidstr[1] != 'd' || strchr(pidstr + 2, '%')) {
131 error_setg(errp, "Bad logfile format: %s", filename);
134 logfilename = g_strdup_printf(filename, getpid());
137 logfilename = g_strdup(filename);
140 qemu_set_log(qemu_loglevel);
143 /* Returns true if addr is in our debug filter or no filter defined
145 bool qemu_log_in_addr_range(uint64_t addr)
149 for (i = 0; i < debug_regions->len; i++) {
150 Range *range = &g_array_index(debug_regions, Range, i);
151 if (range_contains(range, addr)) {
162 void qemu_set_dfilter_ranges(const char *filter_spec, Error **errp)
164 gchar **ranges = g_strsplit(filter_spec, ",", 0);
168 g_array_unref(debug_regions);
169 debug_regions = NULL;
172 debug_regions = g_array_sized_new(FALSE, FALSE,
173 sizeof(Range), g_strv_length(ranges));
174 for (i = 0; ranges[i]; i++) {
175 const char *r = ranges[i];
176 const char *range_op, *r2, *e;
177 uint64_t r1val, r2val, lob, upb;
180 range_op = strstr(r, "-");
181 r2 = range_op ? range_op + 1 : NULL;
183 range_op = strstr(r, "+");
184 r2 = range_op ? range_op + 1 : NULL;
187 range_op = strstr(r, "..");
188 r2 = range_op ? range_op + 2 : NULL;
191 error_setg(errp, "Bad range specifier");
195 if (qemu_strtou64(r, &e, 0, &r1val)
197 error_setg(errp, "Invalid number to the left of %.*s",
198 (int)(r2 - range_op), range_op);
201 if (qemu_strtou64(r2, NULL, 0, &r2val)) {
202 error_setg(errp, "Invalid number to the right of %.*s",
203 (int)(r2 - range_op), range_op);
210 upb = r1val + r2val - 1;
214 lob = r1val - (r2val - 1);
221 g_assert_not_reached();
224 error_setg(errp, "Invalid range");
227 range_set_bounds(&range, lob, upb);
228 g_array_append_val(debug_regions, range);
234 /* fflush() the log file */
235 void qemu_log_flush(void)
237 fflush(qemu_logfile);
240 /* Close the log file */
241 void qemu_log_close(void)
244 if (qemu_logfile != stderr) {
245 fclose(qemu_logfile);
251 const QEMULogItem qemu_log_items[] = {
252 { CPU_LOG_TB_OUT_ASM, "out_asm",
253 "show generated host assembly code for each compiled TB" },
254 { CPU_LOG_TB_IN_ASM, "in_asm",
255 "show target assembly code for each compiled TB" },
256 { CPU_LOG_TB_OP, "op",
257 "show micro ops for each compiled TB" },
258 { CPU_LOG_TB_OP_OPT, "op_opt",
259 "show micro ops after optimization" },
260 { CPU_LOG_TB_OP_IND, "op_ind",
261 "show micro ops before indirect lowering" },
262 { CPU_LOG_INT, "int",
263 "show interrupts/exceptions in short format" },
264 { CPU_LOG_EXEC, "exec",
265 "show trace before each executed TB (lots of logs)" },
266 { CPU_LOG_TB_CPU, "cpu",
267 "show CPU registers before entering a TB (lots of logs)" },
268 { CPU_LOG_TB_FPU, "fpu",
269 "include FPU registers in the 'cpu' logging" },
270 { CPU_LOG_MMU, "mmu",
271 "log MMU-related activities" },
272 { CPU_LOG_PCALL, "pcall",
273 "x86 only: show protected mode far calls/returns/exceptions" },
274 { CPU_LOG_RESET, "cpu_reset",
275 "show CPU state before CPU resets" },
276 { LOG_UNIMP, "unimp",
277 "log unimplemented functionality" },
278 { LOG_GUEST_ERROR, "guest_errors",
279 "log when the guest OS does something invalid (eg accessing a\n"
280 "non-existent register)" },
281 { CPU_LOG_PAGE, "page",
282 "dump pages at beginning of user mode emulation" },
283 { CPU_LOG_TB_NOCHAIN, "nochain",
284 "do not chain compiled TBs so that \"exec\" and \"cpu\" show\n"
287 { CPU_LOG_PLUGIN, "plugin", "output from TCG plugins\n"},
292 /* takes a comma separated list of log masks. Return 0 if error. */
293 int qemu_str_to_log_mask(const char *str)
295 const QEMULogItem *item;
297 char **parts = g_strsplit(str, ",", 0);
300 for (tmp = parts; tmp && *tmp; tmp++) {
301 if (g_str_equal(*tmp, "all")) {
302 for (item = qemu_log_items; item->mask != 0; item++) {
305 #ifdef CONFIG_TRACE_LOG
306 } else if (g_str_has_prefix(*tmp, "trace:") && (*tmp)[6] != '\0') {
307 trace_enable_events((*tmp) + 6);
311 for (item = qemu_log_items; item->mask != 0; item++) {
312 if (g_str_equal(*tmp, item->name)) {
330 void qemu_print_log_usage(FILE *f)
332 const QEMULogItem *item;
333 fprintf(f, "Log items (comma separated):\n");
334 for (item = qemu_log_items; item->mask != 0; item++) {
335 fprintf(f, "%-15s %s\n", item->name, item->help);
337 #ifdef CONFIG_TRACE_LOG
338 fprintf(f, "trace:PATTERN enable trace events\n");
339 fprintf(f, "\nUse \"-d trace:help\" to get a list of trace events.\n\n");