text: /*
     american fuzzy lop++ - unicorn instrumentation
     ----------------------------------------------
  
     Originally written by Andrew Griffiths <agriffiths@google.com> and
                           Michal Zalewski
  
     Adapted for afl-unicorn by Dominik Maier <mail@dmnk.co>
  
     CompareCoverage and NeverZero counters by Andrea Fioraldi
                                    <andreafioraldi@gmail.com>
  
     Copyright 2015, 2016, 2017 Google Inc. All rights reserved.
     Copyright 2019 AFLplusplus Project. 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
  
     This code is a shim patched into the separately-distributed source
     code of Unicorn 1.0.1. It leverages the built-in QEMU tracing functionality
     to implement AFL-style instrumentation and to take care of the remaining
     parts of the AFL fork server logic.
  
     The resulting libunicorn binary is essentially a standalone instrumentation
     tool; for an example of how to leverage it for other purposes, you can
     have a look at afl-showmap.c.
  
   */
  
  #include "../../config.h"
  
  /* NeverZero */
  
  #if (defined(__x86_64__) || defined(__i386__)) && defined(AFL_QEMU_NOT_ZERO)
  #define INC_AFL_AREA(loc)           \
    asm volatile(                     \
        "incb (%0, %1, 1)\n"          \
        "adcb $0, (%0, %1, 1)\n"      \
        : /* no out */                \
        : "r"(afl_area_ptr), "r"(loc) \
        : "memory", "eax")
  #else
  #define INC_AFL_AREA(loc) afl_area_ptr[loc]++
  #endif
  
  