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https://github.com/checkpoint-restore/criu.git
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2e13f1f029
Move static and transition into zdtm top. We can't move all the micro tests themselves, as we need to distinguish static from non static (zdtm.py makes additional checks on static ones). Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>
127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
#include <string.h>
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#include <sys/mman.h>
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#include "zdtmtst.h"
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#ifndef MAP_HUGETLB
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# define MAP_HUGETLB 0x40000
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#endif
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#ifndef MADV_HUGEPAGE
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# define MADV_HUGEPAGE 14
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#endif
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#ifndef MADV_NOHUGEPAGE
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# define MADV_NOHUGEPAGE 15
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#endif
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#ifndef MADV_DONTDUMP
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# define MADV_DONTDUMP 16
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#endif
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static void parse_vmflags(char *buf, unsigned long *flags, unsigned long *madv)
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{
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char *tok;
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if (!buf[0])
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return;
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tok = strtok(buf, " \n");
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if (!tok)
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return;
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#define _vmflag_match(_t, _s) (_t[0] == _s[0] && _t[1] == _s[1])
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do {
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/* mmap() block */
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if (_vmflag_match(tok, "gd"))
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*flags |= MAP_GROWSDOWN;
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else if (_vmflag_match(tok, "lo"))
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*flags |= MAP_LOCKED;
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else if (_vmflag_match(tok, "nr"))
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*flags |= MAP_NORESERVE;
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else if (_vmflag_match(tok, "ht"))
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*flags |= MAP_HUGETLB;
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/* madvise() block */
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if (_vmflag_match(tok, "sr"))
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*madv |= (1ul << MADV_SEQUENTIAL);
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else if (_vmflag_match(tok, "rr"))
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*madv |= (1ul << MADV_RANDOM);
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else if (_vmflag_match(tok, "dc"))
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*madv |= (1ul << MADV_DONTFORK);
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else if (_vmflag_match(tok, "dd"))
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*madv |= (1ul << MADV_DONTDUMP);
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else if (_vmflag_match(tok, "mg"))
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*madv |= (1ul << MADV_MERGEABLE);
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else if (_vmflag_match(tok, "hg"))
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*madv |= (1ul << MADV_HUGEPAGE);
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else if (_vmflag_match(tok, "nh"))
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*madv |= (1ul << MADV_NOHUGEPAGE);
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/*
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* Anything else is just ignored.
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*/
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} while ((tok = strtok(NULL, " \n")));
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#undef _vmflag_match
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}
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#define is_hex_digit(c) \
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(((c) >= '0' && (c) <= '9') || \
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((c) >= 'a' && (c) <= 'f') || \
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((c) >= 'A' && (c) <= 'F'))
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static int is_vma_range_fmt(char *line, unsigned long *start, unsigned long *end)
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{
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char *p = line;
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while (*line && is_hex_digit(*line))
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line++;
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if (*line++ != '-')
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return 0;
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while (*line && is_hex_digit(*line))
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line++;
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if (*line++ != ' ')
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return 0;
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sscanf(p, "%lx-%lx", start, end);
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return 1;
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}
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int get_smaps_bits(unsigned long where, unsigned long *flags, unsigned long *madv)
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{
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unsigned long start = 0, end = 0;
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FILE *smaps = NULL;
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char buf[1024];
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int found = 0;
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if (!where)
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return 0;
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smaps = fopen("/proc/self/smaps", "r");
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if (!smaps) {
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pr_perror("Can't open smaps");
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return -1;
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}
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while (fgets(buf, sizeof(buf), smaps)) {
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is_vma_range_fmt(buf, &start, &end);
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if (!strncmp(buf, "VmFlags: ", 9) && start == where) {
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found = 1;
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parse_vmflags(buf, flags, madv);
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break;
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}
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}
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fclose(smaps);
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if (!found) {
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pr_perror("VmFlags not found for %lx", where);
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return -1;
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}
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return 0;
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}
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