tests/glx/glx-string-sanity.c

   1 /*
   2  * Copyright © 2011 Intel Corporation
   3  *
   4  * Permission is hereby granted, free of charge, to any person obtaining a
   5  * copy of this software and associated documentation files (the "Software"),
   6  * to deal in the Software without restriction, including without limitation
   7  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
   8  * and/or sell copies of the Software, and to permit persons to whom the
   9  * Software is furnished to do so, subject to the following conditions:
  10  *
  11  * The above copyright notice and this permission notice (including the next
  12  * paragraph) shall be included in all copies or substantial portions of the
  13  * Software.
  14  *
  15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
  18  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
  20  * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
  21  * IN THE SOFTWARE.
  22  */
  23
  24
  25 /** @file glx-string-sanity.c
  26  * Sanity check the various GLX extension strings that application can query.
  27  *
  28  * This test reproduces Mesa bug #56057.
  29  */
  30
  31 #include <stdbool.h>
  32 #include "piglit-util-gl.h"
  33 #include "piglit-glx-util.h"
  34
  35 static const char *
  36 eat_whitespace(const char *s)
  37 {
  38         /* Page 17 of the GLX 1.4 spec says:
  39          *
  40          *     "The string is zero-terminated and contains a space-seperated
  41          *     list of extension names."
  42          *
  43          * It doesn't say whitespace.  It just says space.
  44          */
  45         while (*s == ' ' && *s != '\0')
  46                 s++;
  47
  48         return s;
  49 }
  50
  51 static const char *
  52 eat_characters(const char *s)
  53 {
  54         while (*s != ' ' && *s != '\0')
  55                 s++;
  56
  57         return s;
  58 }
  59
  60 static const char *
  61 find_extension(const char *haystack, const char *needle, size_t needle_length)
  62 {
  63         while ((haystack = strstr(haystack, needle)) != NULL) {
  64                 if (haystack[needle_length] == '\0'
  65                     || haystack[needle_length] == ' ')
  66                         break;
  67         }
  68
  69         return haystack;
  70 }
  71
  72 static bool
  73 validate_string(const char *string, const char *name)
  74 {
  75         bool pass = true;
  76
  77         while (*string != '\0') {
  78                 string = eat_whitespace(string);
  79                 if (*string == '\0')
  80                         break;
  81
  82                 if (strncmp("GLX_", string, 4) != 0) {
  83                         char junk[15];
  84
  85                         /* Since the extension string may be very long, just
  86                          * log a few characters.
  87                          */
  88                         strncpy(junk, string, sizeof(junk));
  89                         junk[sizeof(junk) - 1] = '\0';
  90                         fprintf(stderr, "%s contains junk: %s\n", name, junk);
  91                         pass = false;
  92                 }
  93
  94                 string = eat_characters(string);
  95         }
  96
  97         return pass;
  98 }
  99
 100 int
 101 main(int argc, char **argv)
 102 {
 103         bool pass = true;
 104         const char *client_string;
 105         const char *server_string;
 106         const char *unified_string;
 107         char *buf;
 108
 109         Display *dpy = XOpenDisplay(NULL);
 110         if (dpy == NULL) {
 111                 fprintf(stderr, "couldn't open display\n");
 112                 piglit_report_result(PIGLIT_FAIL);
 113         }
 114
 115         /* First, make sure that all the strings have the correct format.
 116          */
 117         server_string = glXQueryServerString(dpy, 0, GLX_EXTENSIONS);
 118         pass = validate_string(server_string, "server extensions string")
 119                 && pass;
 120
 121         client_string = glXGetClientString(dpy, GLX_EXTENSIONS);
 122         pass = validate_string(client_string, "client extensions string")
 123                 && pass;
 124
 125         unified_string = glXQueryExtensionsString(dpy, 0);
 126         pass = validate_string(unified_string, "unified extensions string")
 127                 && pass;
 128
 129         /* Now make sure that any string listed in both the server string and
 130          * the client string is listed in the unified string.
 131          *
 132          * Also make sure that any string *not* listed in the client string is
 133          * *not* listed in the unified string.  Since there are several
 134          * "client only" extensions (e.g., GLX_ARB_get_proc_address), it is
 135          * valid for a string to not be in the server string when it is listed
 136          * in the unified string.
 137          */
 138         buf = malloc(strlen(server_string) + 1);
 139         while (*server_string != '\0') {
 140                 const char *client;
 141                 const char *end;
 142                 size_t bytes;
 143
 144
 145                 server_string = eat_whitespace(server_string);
 146                 if (*server_string == '\0')
 147                         break;
 148
 149                 end = eat_characters(server_string);
 150
 151                 bytes = (size_t)(end - server_string);
 152                 memcpy(buf, server_string, bytes);
 153                 buf[bytes] = '\0';
 154
 155                 /* Try to find the extension in the client extension list.
 156                  */
 157                 client = find_extension(client_string, buf, bytes);
 158                 if (client == NULL) {
 159                         if (find_extension(unified_string, buf, bytes) != NULL) {
 160                                 fprintf(stderr,
 161                                         "%s not found in client extension "
 162                                         "string, but found in unified "
 163                                         "string.\n",
 164                                         buf);
 165                                 pass = false;
 166                         }
 167                 }
 168
 169                 server_string = end;
 170         }
 171
 172         free(buf);
 173
 174         XCloseDisplay(dpy);
 175
 176         piglit_report_result(pass ? PIGLIT_PASS : PIGLIT_FAIL);
 177         return 0;
 178 }