FD.io VPP  v19.01.2-3-gf61a1a8
Vector Packet Processing
mapfile_tool.c
Go to the documentation of this file.
1 /*
2  * mapfile_tool.c - skeleton vpp engine plug-in
3  *
4  * Copyright (c) 2018 Cisco Systems and/or affiliates
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  */
17 #include <stdio.h>
18 #include <vppinfra/format.h>
19 #include <vppinfra/error.h>
20 #include <vppinfra/unix.h>
21 
22 typedef struct
23 {
28  FILE *ofp;
30 
32 
33 static char *top_boilerplate =
34  "typedef struct {\n"
35  " u8 model;\n"
36  " u8 stepping;\n"
37  " u8 has_stepping;\n"
38  " char *filename;\n"
39  "} file_by_model_and_stepping_t;\n\n"
40  "static const file_by_model_and_stepping_t fms_table [] =\n"
41  "{\n" " /* model, stepping, stepping valid, file */\n";
42 
43 static char *bottom_boilerplate = "};\n";
44 
45 static void
46 print_chunk (mapfile_tool_main_t * mtm, char *chunk)
47 {
48  fformat (mtm->ofp, "%s", chunk);
49 }
50 
51 static int
53 {
54  u8 *cp = mtm->mapfile;
55  int i;
56  char model[3];
57  u8 *stepping = 0;
58  u8 *filename = 0;
59  int has_stepping;
60 
61  /* Skip header line */
62  while (*cp && *cp != '\n')
63  cp++;
64 
65  if (*cp == 0)
66  {
67  fformat (stderr, "mapfile broken or empty\n");
68  return 1;
69  }
70  /* skip newline */
71  cp++;
72 
73  /* GenuineIntel-6-55-[01234],V1.12,/SKX/skylakex_uncore_v1.12.json,uncore */
74  /* skip 15 ^ */
75 
76  /* Across payload lines... */
77  while (1)
78  {
79  if (*cp == 0)
80  return 0;
81 
82  for (i = 0; i < 15; i++)
83  {
84  if (*cp == 0)
85  {
86  bad:
87  fformat (stderr, "mapfile broken\n");
88  return 1;
89  }
90  cp++;
91  }
92  /* should point at model */
93  model[0] = *cp++;
94  model[1] = *cp++;
95  model[2] = 0;
96  vec_reset_length (stepping);
97  /* Stepping significant? */
98  if (*cp == '-')
99  {
100  cp += 2;
101  while (*cp != ']')
102  {
103  vec_add1 (stepping, *cp);
104  cp++;
105  }
106  cp++;
107  }
108  /* Skip dirname */
109  while (*cp != '/')
110  cp++;
111  cp++;
112  while (*cp != '/')
113  *cp++;
114  cp++;
115  vec_reset_length (filename);
116  while (*cp != ',')
117  {
118  vec_add1 (filename, *cp);
119  cp++;
120  }
121 
122  cp++;
123  /* We only want ",core" entries */
124  if (memcmp (cp, "core", 4))
125  {
126  while (*cp && *cp != '\n')
127  cp++;
128  if (*cp)
129  cp++;
130  continue;
131  }
132 
133  /* Skip to start of next line */
134  while (*cp && *cp != '\n')
135  cp++;
136  if (*cp)
137  cp++;
138 
139  has_stepping = 1;
140 
141  if (vec_len (stepping) == 0)
142  {
143  vec_add1 (stepping, '0');
144  has_stepping = 0;
145  }
146 
147  for (i = 0; i < vec_len (stepping); i++)
148  {
149  mtm->table =
150  format (mtm->table, " { 0x%s, 0x%c, %d, \"%v\" },\n",
151  model, stepping[i], has_stepping, filename);
152  }
153  }
154 
155  /* NOTREACHED */
156  return -11;
157 }
158 
159 static int
161 {
162  u8 *mapfile;
163  int rv;
164  clib_error_t *error;
165 
167  {
168  if (unformat (input, "in %s", &mtm->ifile))
169  ;
170  else if (unformat (input, "out %s", &mtm->ofile))
171  ;
172  else
173  {
174  fformat (stderr, "unknown input '%U'\n", format_unformat_error,
175  input);
176  usage:
177  fformat (stderr, "usage: mapfile_tool in <ifile> out <ofile>\n");
178  return 1;
179  }
180  }
181 
182  if (mtm->ifile == 0)
183  {
184  fformat (stderr, "input file not specified\n");
185  goto usage;
186  }
187 
188  if (mtm->ofile == 0)
189  mtm->ofile = format (0, "perfmon_version.c%c", 0);
190 
191  mtm->ofp = fopen ((char *) mtm->ofile, "w");
192  if (mtm->ofp == NULL)
193  {
194  fformat (stderr, "Couldn't create '%s'\n", mtm->ofile);
195  return 1;
196  }
197 
198  error = unix_proc_file_contents ((char *) mtm->ifile, &mapfile);
199 
200  if (error)
201  {
202  clib_error_free (error);
203  fformat (stderr, "Failed to read mapfile from %s", mtm->ifile);
204  return 1;
205  }
206 
207  mtm->mapfile = mapfile;
208 
209  rv = parse_mapfile (mtm);
210  if (rv)
211  return rv;
212 
214  print_chunk (mtm, (char *) mtm->table);
216  return 0;
217 }
218 
219 int
220 main (int argc, char *argv[])
221 {
222  unformat_input_t input;
224  int r;
225 
226  clib_mem_init (0, 128 << 20);
227 
228  unformat_init_command_line (&input, argv);
229  r = mapfile_main (&input, mtm);
230  unformat_free (&input);
231  return r;
232 }
233 
234 
235 /*
236  * fd.io coding-style-patch-verification: ON
237  *
238  * Local Variables:
239  * eval: (c-set-style "gnu")
240  * End:
241  */
#define NULL
Definition: clib.h:58
#define vec_add1(V, E)
Add 1 element to end of vector (unspecified alignment).
Definition: vec.h:525
int i
static void usage(void)
Definition: health_check.c:14
u8 * format(u8 *s, const char *fmt,...)
Definition: format.c:419
unsigned char u8
Definition: types.h:56
#define vec_reset_length(v)
Reset vector length to zero NULL-pointer tolerant.
struct _unformat_input_t unformat_input_t
void unformat_init_command_line(unformat_input_t *input, char *argv[])
Definition: unformat.c:1007
int main(int argc, char *argv[])
Definition: mapfile_tool.c:220
word fformat(FILE *f, char *fmt,...)
Definition: format.c:453
void * clib_mem_init(void *heap, uword size)
Definition: mem_dlmalloc.c:206
#define UNFORMAT_END_OF_INPUT
Definition: format.h:144
static void print_chunk(mapfile_tool_main_t *mtm, char *chunk)
Definition: mapfile_tool.c:46
static int parse_mapfile(mapfile_tool_main_t *mtm)
Definition: mapfile_tool.c:52
static char * top_boilerplate
Definition: mapfile_tool.c:33
#define vec_len(v)
Number of elements in vector (rvalue-only, NULL tolerant)
static void unformat_free(unformat_input_t *i)
Definition: format.h:162
clib_error_t * unix_proc_file_contents(char *file, u8 **result)
Definition: unix-misc.c:134
#define clib_error_free(e)
Definition: error.h:86
u8 * format_unformat_error(u8 *s, va_list *va)
Definition: unformat.c:91
static char * bottom_boilerplate
Definition: mapfile_tool.c:43
uword unformat(unformat_input_t *i, const char *fmt,...)
Definition: unformat.c:972
mapfile_tool_main_t mapfile_tool_main
Definition: mapfile_tool.c:31
static int mapfile_main(unformat_input_t *input, mapfile_tool_main_t *mtm)
Definition: mapfile_tool.c:160
static uword unformat_check_input(unformat_input_t *i)
Definition: format.h:170