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 #ifdef WIN32
  24 static const char *logfilename = "qemu.log";
  25 #else
  26 static const char *logfilename = "/tmp/qemu.log";
  27 #endif
  28 FILE *qemu_logfile;
  29 int qemu_loglevel;
  30 static int log_append = 0;
  31
  32 void qemu_log(const char *fmt, ...)
  33 {
  34     va_list ap;
  35
  36     va_start(ap, fmt);
  37     if (qemu_logfile) {
  38         vfprintf(qemu_logfile, fmt, ap);
  39     }
  40     va_end(ap);
  41 }
  42
  43 void qemu_log_mask(int mask, const char *fmt, ...)
  44 {
  45     va_list ap;
  46
  47     va_start(ap, fmt);
  48     if ((qemu_loglevel & mask) && qemu_logfile) {
  49         vfprintf(qemu_logfile, fmt, ap);
  50     }
  51     va_end(ap);
  52 }
  53
  54 /* enable or disable low levels log */
  55 void cpu_set_log(int log_flags)
  56 {
  57     qemu_loglevel = log_flags;
  58     if (qemu_loglevel && !qemu_logfile) {
  59         qemu_logfile = fopen(logfilename, log_append ? "a" : "w");
  60         if (!qemu_logfile) {
  61             perror(logfilename);
  62             _exit(1);
  63         }
  64 #if !defined(CONFIG_SOFTMMU)
  65         /* must avoid mmap() usage of glibc by setting a buffer "by hand" */
  66         {
  67             static char logfile_buf[4096];
  68             setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf));
  69         }
  70 #elif defined(_WIN32)
  71         /* Win32 doesn't support line-buffering, so use unbuffered output. */
  72         setvbuf(qemu_logfile, NULL, _IONBF, 0);
  73 #else
  74         setvbuf(qemu_logfile, NULL, _IOLBF, 0);
  75 #endif
  76         log_append = 1;
  77     }
  78     if (!qemu_loglevel && qemu_logfile) {
  79         fclose(qemu_logfile);
  80         qemu_logfile = NULL;
  81     }
  82 }
  83
  84 void cpu_set_log_filename(const char *filename)
  85 {
  86     logfilename = strdup(filename);
  87     if (qemu_logfile) {
  88         fclose(qemu_logfile);
  89         qemu_logfile = NULL;
  90     }
  91     cpu_set_log(qemu_loglevel);
  92 }
  93
  94 const CPULogItem cpu_log_items[] = {
  95     { CPU_LOG_TB_OUT_ASM, "out_asm",
  96       "show generated host assembly code for each compiled TB" },
  97     { CPU_LOG_TB_IN_ASM, "in_asm",
  98       "show target assembly code for each compiled TB" },
  99     { CPU_LOG_TB_OP, "op",
 100       "show micro ops for each compiled TB" },
 101     { CPU_LOG_TB_OP_OPT, "op_opt",
 102       "show micro ops "
 103 #ifdef TARGET_I386
 104       "before eflags optimization and "
 105 #endif
 106       "after liveness analysis" },
 107     { CPU_LOG_INT, "int",
 108       "show interrupts/exceptions in short format" },
 109     { CPU_LOG_EXEC, "exec",
 110       "show trace before each executed TB (lots of logs)" },
 111     { CPU_LOG_TB_CPU, "cpu",
 112       "show CPU state before block translation" },
 113 #ifdef TARGET_I386
 114     { CPU_LOG_PCALL, "pcall",
 115       "show protected mode far calls/returns/exceptions" },
 116     { CPU_LOG_RESET, "cpu_reset",
 117       "show CPU state before CPU resets" },
 118 #endif
 119 #ifdef DEBUG_IOPORT
 120     { CPU_LOG_IOPORT, "ioport",
 121       "show all i/o ports accesses" },
 122 #endif
 123     { LOG_UNIMP, "unimp",
 124       "log unimplemented functionality" },
 125     { 0, NULL, NULL },
 126 };
 127
 128 static int cmp1(const char *s1, int n, const char *s2)
 129 {
 130     if (strlen(s2) != n) {
 131         return 0;
 132     }
 133     return memcmp(s1, s2, n) == 0;
 134 }
 135
 136 /* takes a comma separated list of log masks. Return 0 if error. */
 137 int cpu_str_to_log_mask(const char *str)
 138 {
 139     const CPULogItem *item;
 140     int mask;
 141     const char *p, *p1;
 142
 143     p = str;
 144     mask = 0;
 145     for (;;) {
 146         p1 = strchr(p, ',');
 147         if (!p1) {
 148             p1 = p + strlen(p);
 149         }
 150         if (cmp1(p,p1-p,"all")) {
 151             for (item = cpu_log_items; item->mask != 0; item++) {
 152                 mask |= item->mask;
 153             }
 154         } else {
 155             for (item = cpu_log_items; item->mask != 0; item++) {
 156                 if (cmp1(p, p1 - p, item->name)) {
 157                     goto found;
 158                 }
 159             }
 160             return 0;
 161         }
 162     found:
 163         mask |= item->mask;
 164         if (*p1 != ',') {
 165             break;
 166         }
 167         p = p1 + 1;
 168     }
 169     return mask;
 170 }