1 /* Copyright (c) 2008-2012 Da SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "mc_private.h"
10 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(mc_memory_map, mc,
11 "Logging specific to algorithms for memory_map");
13 memory_map_t get_memory_map(void)
15 FILE *fp; /* File pointer to process's proc maps file */
16 char *line = NULL; /* Temporal storage for each line that is readed */
17 ssize_t read; /* Number of bytes readed */
18 size_t n = 0; /* Amount of bytes to read by getline */
19 memory_map_t ret = NULL; /* The memory map to return */
21 /* The following variables are used during the parsing of the file "maps" */
22 s_map_region_t memreg; /* temporal map region used for creating the map */
23 char *lfields[6], *tok, *endptr;
26 /* Open the actual process's proc maps file and create the memory_map_t */
28 fp = fopen("/proc/self/maps", "r");
31 perror("fopen failed");
34 "Cannot open /proc/self/maps to investigate the memory map of the process. Please report this bug.");
36 ret = xbt_new0(s_memory_map_t, 1);
38 /* Read one line at the time, parse it and add it to the memory map to be returned */
39 while ((read = getline(&line, &n, fp)) != -1) {
41 //fprintf(stderr,"%s", line);
43 /* Wipeout the new line character */
44 line[read - 1] = '\0';
46 /* Tokenize the line using spaces as delimiters and store each token */
47 /* in lfields array. We expect 5 tokens/fields */
48 lfields[0] = strtok(line, " ");
50 for (i = 1; i < 6 && lfields[i - 1] != NULL; i++) {
51 lfields[i] = strtok(NULL, " ");
54 /* Check to see if we got the expected amount of columns */
58 /* Ok we are good enough to try to get the info we need */
59 /* First get the start and the end address of the map */
60 tok = strtok(lfields[0], "-");
64 memreg.start_addr = (void *) strtoul(tok, &endptr, 16);
65 /* Make sure that the entire string was an hex number */
69 tok = strtok(NULL, "-");
73 memreg.end_addr = (void *) strtoul(tok, &endptr, 16);
74 /* Make sure that the entire string was an hex number */
78 /* Get the permissions flags */
79 if (strlen(lfields[1]) < 4)
84 for (i = 0; i < 3; i++){
85 switch(lfields[1][i]){
87 memreg.prot |= PROT_READ;
90 memreg.prot |= PROT_WRITE;
93 memreg.prot |= PROT_EXEC;
100 memreg.prot |= PROT_NONE;
102 if (lfields[1][4] == 'p')
103 memreg.flags |= MAP_PRIVATE;
105 else if (lfields[1][4] == 's')
106 memreg.flags |= MAP_SHARED;
108 /* Get the offset value */
109 memreg.offset = (void *) strtoul(lfields[2], &endptr, 16);
110 /* Make sure that the entire string was an hex number */
114 /* Get the device major:minor bytes */
115 tok = strtok(lfields[3], ":");
119 memreg.dev_major = (char) strtoul(tok, &endptr, 16);
120 /* Make sure that the entire string was an hex number */
124 tok = strtok(NULL, ":");
128 memreg.dev_minor = (char) strtoul(tok, &endptr, 16);
129 /* Make sure that the entire string was an hex number */
133 /* Get the inode number and make sure that the entire string was a long int */
134 memreg.inode = strtoul(lfields[4], &endptr, 10);
138 /* And finally get the pathname */
139 memreg.pathname = xbt_strdup(lfields[5]);
141 /* Create space for a new map region in the region's array and copy the */
142 /* parsed stuff from the temporal memreg variable */
144 xbt_realloc(ret->regions, sizeof(memreg) * (ret->mapsize + 1));
145 memcpy(ret->regions + ret->mapsize, &memreg, sizeof(memreg));