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#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <stdint.h>
#include "vm.h"
#include "util.h"
static void strtrim (char *str)
{
char *begin = str;
while (isspace(*begin)) {
begin++;
}
size_t len = strlen(begin);
char *end = begin + len;
while (end > begin && isspace(*end)) {
end++;
}
memmove(str, begin, end - begin + 1);
}
VMMapping* parse_vmmap (int pid)
{
char fmaps_path[128];
sprintf(fmaps_path, "/proc/%d/maps", pid);
FILE *fmaps;
if ((fmaps = fopen(fmaps_path, "r")) == NULL) {
perror("fopen");
exit(1);
}
uint64_t begin, end;
char perms[16];
char filename[1024];
VMMapping *head = NULL;
VMMapping *cur = NULL;
while(
fscanf(fmaps, "%lx-%lx %15s %*x %*x:%*x %*u%1023[^\n]",
&begin, &end, perms, filename) != EOF) {
strtrim(filename);
VMMapping *new_mapping = xmalloc(sizeof(VMMapping));
*new_mapping = (VMMapping) {
.begin = begin,
.end = end,
.r = perms[0] == 'r',
.w = perms[1] == 'w',
.x = perms[2] == 'x',
.s = perms[3] == 's',
.p = perms[3] == 'p',
.name = strdup(filename),
.next = NULL,
};
if (head) {
cur->next = new_mapping;
cur = new_mapping;
} else {
head = cur = new_mapping;
}
LOG("%lx-%lx %c%c%c%c %s\n",
cur->begin,
cur->end,
cur->r ? 'r' : '-',
cur->w ? 'w' : '-',
cur->x ? 'x' : '-',
cur->s ? 's' : 'p',
cur->name);
}
return head;
}
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