diff options
Diffstat (limited to 'util/log.c')
| -rw-r--r-- | util/log.c | 179 |
1 files changed, 179 insertions, 0 deletions
diff --git a/util/log.c b/util/log.c new file mode 100644 index 0000000000..901b93087d --- /dev/null +++ b/util/log.c @@ -0,0 +1,179 @@ +/* + * Logging support + * + * Copyright (c) 2003 Fabrice Bellard + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2 of the License, or (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with this library; if not, see <http://www.gnu.org/licenses/>. + */ + +#include "qemu-common.h" +#include "qemu/log.h" + +static char *logfilename; +FILE *qemu_logfile; +int qemu_loglevel; +static int log_append = 0; + +void qemu_log(const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + if (qemu_logfile) { + vfprintf(qemu_logfile, fmt, ap); + } + va_end(ap); +} + +void qemu_log_mask(int mask, const char *fmt, ...) +{ + va_list ap; + + va_start(ap, fmt); + if ((qemu_loglevel & mask) && qemu_logfile) { + vfprintf(qemu_logfile, fmt, ap); + } + va_end(ap); +} + +/* enable or disable low levels log */ +void do_qemu_set_log(int log_flags, bool use_own_buffers) +{ + qemu_loglevel = log_flags; + if (qemu_loglevel && !qemu_logfile) { + if (logfilename) { + qemu_logfile = fopen(logfilename, log_append ? "a" : "w"); + if (!qemu_logfile) { + perror(logfilename); + _exit(1); + } + } else { + /* Default to stderr if no log file specified */ + qemu_logfile = stderr; + } + /* must avoid mmap() usage of glibc by setting a buffer "by hand" */ + if (use_own_buffers) { + static char logfile_buf[4096]; + + setvbuf(qemu_logfile, logfile_buf, _IOLBF, sizeof(logfile_buf)); + } else { +#if defined(_WIN32) + /* Win32 doesn't support line-buffering, so use unbuffered output. */ + setvbuf(qemu_logfile, NULL, _IONBF, 0); +#else + setvbuf(qemu_logfile, NULL, _IOLBF, 0); +#endif + log_append = 1; + } + } + if (!qemu_loglevel && qemu_logfile) { + qemu_log_close(); + } +} + +void qemu_set_log_filename(const char *filename) +{ + g_free(logfilename); + logfilename = g_strdup(filename); + qemu_log_close(); + qemu_set_log(qemu_loglevel); +} + +const QEMULogItem qemu_log_items[] = { + { CPU_LOG_TB_OUT_ASM, "out_asm", + "show generated host assembly code for each compiled TB" }, + { CPU_LOG_TB_IN_ASM, "in_asm", + "show target assembly code for each compiled TB" }, + { CPU_LOG_TB_OP, "op", + "show micro ops for each compiled TB" }, + { CPU_LOG_TB_OP_OPT, "op_opt", + "show micro ops (x86 only: before eflags optimization) and\n" + "after liveness analysis" }, + { CPU_LOG_INT, "int", + "show interrupts/exceptions in short format" }, + { CPU_LOG_EXEC, "exec", + "show trace before each executed TB (lots of logs)" }, + { CPU_LOG_TB_CPU, "cpu", + "show CPU state before block translation" }, + { CPU_LOG_MMU, "mmu", + "log MMU-related activities" }, + { CPU_LOG_PCALL, "pcall", + "x86 only: show protected mode far calls/returns/exceptions" }, + { CPU_LOG_RESET, "cpu_reset", + "show CPU state before CPU resets" }, + { LOG_UNIMP, "unimp", + "log unimplemented functionality" }, + { LOG_GUEST_ERROR, "guest_errors", + "log when the guest OS does something invalid (eg accessing a\n" + "non-existent register)" }, + { CPU_LOG_PAGE, "page", + "dump pages at beginning of user mode emulation" }, + { CPU_LOG_TB_NOCHAIN, "nochain", + "do not chain compiled TBs so that \"exec\" and \"cpu\" show\n" + "complete traces" }, + { 0, NULL, NULL }, +}; + +static int cmp1(const char *s1, int n, const char *s2) +{ + if (strlen(s2) != n) { + return 0; + } + return memcmp(s1, s2, n) == 0; +} + +/* takes a comma separated list of log masks. Return 0 if error. */ +int qemu_str_to_log_mask(const char *str) +{ + const QEMULogItem *item; + int mask; + const char *p, *p1; + + p = str; + mask = 0; + for (;;) { + p1 = strchr(p, ','); + if (!p1) { + p1 = p + strlen(p); + } + if (cmp1(p,p1-p,"all")) { + for (item = qemu_log_items; item->mask != 0; item++) { + mask |= item->mask; + } + } else { + for (item = qemu_log_items; item->mask != 0; item++) { + if (cmp1(p, p1 - p, item->name)) { + goto found; + } + } + return 0; + } + found: + mask |= item->mask; + if (*p1 != ',') { + break; + } + p = p1 + 1; + } + return mask; +} + +void qemu_print_log_usage(FILE *f) +{ + const QEMULogItem *item; + fprintf(f, "Log items (comma separated):\n"); + for (item = qemu_log_items; item->mask != 0; item++) { + fprintf(f, "%-10s %s\n", item->name, item->help); + } +} |