Archipelago » qemu

/*

 * 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"

#ifdef WIN32

static const char *logfilename = "qemu.log";

#else

static const char *logfilename = "/tmp/qemu.log";

#endif

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 qemu_set_log(int log_flags, bool use_own_buffers)

{

    qemu_loglevel = log_flags;

    if (qemu_loglevel && !qemu_logfile) {

        qemu_logfile = fopen(logfilename, log_append ? "a" : "w");

        if (!qemu_logfile) {

            perror(logfilename);

            _exit(1);

        }

        /* 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) {

        fclose(qemu_logfile);

        qemu_logfile = NULL;

    }

}

void cpu_set_log_filename(const char *filename)

{

    logfilename = strdup(filename);

    if (qemu_logfile) {

        fclose(qemu_logfile);

        qemu_logfile = NULL;

    }

    cpu_set_log(qemu_loglevel);

}

const CPULogItem cpu_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_PCALL, "pcall",

      "x86 only: show protected mode far calls/returns/exceptions" },

    { CPU_LOG_RESET, "cpu_reset",

      "x86 only: show CPU state before CPU resets" },

    { CPU_LOG_IOPORT, "ioport",

      "show all i/o ports accesses" },

    { 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)" },

    { 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 cpu_str_to_log_mask(const char *str)

{

    const CPULogItem *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 = cpu_log_items; item->mask != 0; item++) {

                mask |= item->mask;

            }

        } else {

            for (item = cpu_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;

}