text: /*
   * Copyright 2014-2016, Intel Corporation
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   *
   *     * Redistributions of source code must retain the above copyright
   *       notice, this list of conditions and the following disclaimer.
   *
   *     * Redistributions in binary form must reproduce the above copyright
   *       notice, this list of conditions and the following disclaimer in
   *       the documentation and/or other materials provided with the
   *       distribution.
   *
   *     * Neither the name of the copyright holder nor the names of its
   *       contributors may be used to endorse or promote products derived
   *       from this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  /*
   * util_map_proc.c -- unit test for util_map() /proc parsing
   *
   * usage: util_map_proc maps_file len [len]...
   */
  
  #define _GNU_SOURCE
  
  #include <dlfcn.h>
  #include "unittest.h"
  #include "util.h"
  #include "mmap.h"
  
  #define MEGABYTE ((uintptr_t)1 << 20)
  #define GIGABYTE ((uintptr_t)1 << 30)
  #define TERABYTE ((uintptr_t)1 << 40)
  
  char *Sfile;
  
  /*
   * fopen -- interpose on libc fopen()
   *
   * This catches opens to /proc/self/maps and sends them to the fake maps
   * file being tested.
   */
  FILE *
  fopen(const char *path, const char *mode)
  {
  	static FILE *(*fopen_ptr)(const char *path, const char *mode);
  
  	if (strcmp(path, "/proc/self/maps") == 0) {
  		UT_OUT("redirecting /proc/self/maps to %s", Sfile);
  		path = Sfile;
  	}
  
  	if (fopen_ptr == NULL)
  		fopen_ptr = dlsym(RTLD_NEXT, "fopen");
  
  	return (*fopen_ptr)(path, mode);
  }
  
  int
  main(int argc, char *argv[])
  {
  	START(argc, argv, "util_map_proc");
  
  	util_init();
  	util_mmap_init();
  
  	if (argc < 3)
  		UT_FATAL("usage: %s maps_file len [len]...", argv[0]);
  
  	Sfile = argv[1];
  
  	for (int arg = 2; arg < argc; arg++) {
  		size_t len = (size_t)strtoull(argv[arg], NULL, 0);
  
  		size_t align = Ut_pagesize;
  		if (len >= 2 * GIGABYTE)
  			align = GIGABYTE;
  		else if (len >= 4 * MEGABYTE)
  			align = 2 * MEGABYTE;
  
  		void *h1 =
  			util_map_hint_unused((void *)TERABYTE, len, GIGABYTE);
  		void *h2 = util_map_hint(len, 0);
  		if (h1 != MAP_FAILED && h1 != NULL)
  			UT_ASSERTeq((uintptr_t)h1 & (GIGABYTE - 1), 0);
  		if (h2 != MAP_FAILED && h2 != NULL)
  			UT_ASSERTeq((uintptr_t)h2 & (align - 1), 0);
  		UT_OUT("len %zu: %p %p", len, h1, h2);
  	}
  
  	DONE(NULL);
  }
  