debug.h

/*
   american fuzzy lop - debug / error handling macros
   --------------------------------------------------

   Written and maintained by Michal Zalewski <lcamtuf@google.com>

   Copyright 2013, 2014, 2015 Google Inc. All rights reserved.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at:

     http://www.apache.org/licenses/LICENSE-2.0

 */

#ifndef _HAVE_DEBUG_H
#define _HAVE_DEBUG_H

#include <errno.h>

#include "types.h"
#include "config.h"

/*******************
 * Terminal colors *
 *******************/

#ifdef USE_COLOR

#  define cBLK "\x1b[0;30m"
#  define cRED "\x1b[0;31m"
#  define cGRN "\x1b[0;32m"
#  define cBRN "\x1b[0;33m"
#  define cBLU "\x1b[0;34m"
#  define cMGN "\x1b[0;35m"
#  define cCYA "\x1b[0;36m"
#  define cNOR "\x1b[0;37m"
#  define cGRA "\x1b[1;30m"
#  define cLRD "\x1b[1;31m"
#  define cLGN "\x1b[1;32m"
#  define cYEL "\x1b[1;33m"
#  define cLBL "\x1b[1;34m"
#  define cPIN "\x1b[1;35m"
#  define cLCY "\x1b[1;36m"
#  define cBRI "\x1b[1;37m"
#  define cRST "\x1b[0m"

#else

#  define cBLK ""
#  define cRED ""
#  define cGRN ""
#  define cBRN ""
#  define cBLU ""
#  define cMGN ""
#  define cCYA ""
#  define cNOR ""
#  define cGRA ""
#  define cLRD ""
#  define cLGN ""
#  define cYEL ""
#  define cLBL ""
#  define cPIN ""
#  define cLCY ""
#  define cBRI ""
#  define cRST ""

#endif /* ^USE_COLOR */

/*************************
 * Box drawing sequences *
 *************************/

#ifdef FANCY_BOXES

#  define SET_G1   "\x1b)0"       /* Set G1 for box drawing    */
#  define RESET_G1 "\x1b)B"       /* Reset G1 to ASCII         */
#  define bSTART   "\x0e"         /* Enter G1 drawing mode     */
#  define bSTOP    "\x0f"         /* Leave G1 drawing mode     */
#  define bH       "q"            /* Horizontal line           */
#  define bV       "x"            /* Vertical line             */
#  define bLT      "l"            /* Left top corner           */
#  define bRT      "k"            /* Right top corner          */
#  define bLB      "m"            /* Left bottom corner        */
#  define bRB      "j"            /* Right bottom corner       */
#  define bX       "n"            /* Cross                     */
#  define bVR      "t"            /* Vertical, branch right    */
#  define bVL      "u"            /* Vertical, branch left     */
#  define bHT      "v"            /* Horizontal, branch top    */
#  define bHB      "w"            /* Horizontal, branch bottom */

#else

#  define SET_G1   ""
#  define RESET_G1 ""
#  define bSTART   ""
#  define bSTOP    ""
#  define bH       "-"
#  define bV       "|"
#  define bLT      "+"
#  define bRT      "+"
#  define bLB      "+"
#  define bRB      "+"
#  define bX       "+"
#  define bVR      "+"
#  define bVL      "+"
#  define bHT      "+"
#  define bHB      "+"

#endif /* ^FANCY_BOXES */

/***********************
 * Misc terminal codes *
 ***********************/

#define TERM_HOME     "\x1b[H"
#define TERM_CLEAR    TERM_HOME "\x1b[2J"
#define cEOL          "\x1b[0K"
#define CURSOR_HIDE   "\x1b[?25l"
#define CURSOR_SHOW   "\x1b[?25h"

/************************
 * Debug & error macros *
 ************************/

/* Just print stuff to the appropriate stream. */

#ifdef MESSAGES_TO_STDOUT
#  define SAYF(x...)    printf(x)
#else 
#  define SAYF(x...)    fprintf(stderr, x)
#endif /* ^MESSAGES_TO_STDOUT */

/* Show a prefixed warning. */

#define WARNF(x...) do { \
    SAYF(cYEL "[!] " cBRI "WARNING: " cRST x); \
    SAYF(cRST "\n"); \
  } while (0)

/* Show a prefixed "doing something" message. */

#define ACTF(x...) do { \
    SAYF(cLBL "[*] " cRST x); \
    SAYF(cRST "\n"); \
  } while (0)

/* Show a prefixed "success" message. */

#define OKF(x...) do { \
    SAYF(cLGN "[+] " cRST x); \
    SAYF(cRST "\n"); \
  } while (0)

/* Show a prefixed fatal error message (not used in afl). */

#define BADF(x...) do { \
    SAYF(cLRD "\n[-] " cRST x); \
    SAYF(cRST "\n"); \
  } while (0)

/* Die with a verbose non-OS fatal error message. */

#define FATAL(x...) do { \
    SAYF(bSTOP RESET_G1 CURSOR_SHOW cLRD "\n[-] PROGRAM ABORT : " cBRI x); \
    SAYF(cLRD "\n         Location : " cRST "%s(), %s:%u\n\n", \
         __FUNCTION__, __FILE__, __LINE__); \
    exit(1); \
  } while (0)

/* Die by calling abort() to provide a core dump. */

#define ABORT(x...) do { \
    SAYF(bSTOP RESET_G1 CURSOR_SHOW cLRD "\n[-] PROGRAM ABORT : " cBRI x); \
    SAYF(cLRD "\n    Stop location : " cRST "%s(), %s:%u\n\n", \
         __FUNCTION__, __FILE__, __LINE__); \
    abort(); \
  } while (0)

/* Die while also including the output of perror(). */

#define PFATAL(x...) do { \
    fflush(stdout); \
    SAYF(bSTOP RESET_G1 CURSOR_SHOW cLRD "\n[-]  SYSTEM ERROR : " cBRI x); \
    SAYF(cLRD "\n    Stop location : " cRST "%s(), %s:%u\n", \
         __FUNCTION__, __FILE__, __LINE__); \
    SAYF(cLRD "       OS message : " cRST "%s\n", strerror(errno)); \
    exit(1); \
  } while (0)

/* Die with FAULT() or PFAULT() depending on the value of res (used to
   interpret different failure modes for read(), write(), etc). */

#define RPFATAL(res, x...) do { \
    if (res < 0) PFATAL(x); else FATAL(x); \
  } while (0)

/* Error-checking versions of read() and write() that call RPFATAL() as
   appropriate. */

#define ck_write(fd, buf, len, fn) do { \
    u32 _len = (len); \
    s32 _res = write(fd, buf, _len); \
    if (_res != _len) RPFATAL(_res, "Short write to %s", fn); \
  } while (0)

#define ck_read(fd, buf, len, fn) do { \
    u32 _len = (len); \
    s32 _res = read(fd, buf, _len); \
    if (_res != _len) RPFATAL(_res, "Short read from %s", fn); \
  } while (0)

#endif /* ! _HAVE_DEBUG_H */