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test/zdtm/static/maps02: add MAP_DROPPABLE testcase

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Signed-off-by: Alexander Mikhalitsyn <aleksandr.mikhalitsyn@canonical.com>
This commit is contained in:
Alexander Mikhalitsyn 2025-05-04 17:21:23 +02:00 committed by Andrei Vagin
parent ae9d0d0557
commit 27653caa4c
2 changed files with 23 additions and 3 deletions
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6
test/zdtm/static/get_smaps_bits.c
View File

@ -6,6 +6,10 @@
#define MAP_HUGETLB 0x40000
#endif
#ifndef MAP_DROPPABLE
#define MAP_DROPPABLE 0x08
#endif
#ifndef MADV_HUGEPAGE
#define MADV_HUGEPAGE 14
#endif
@ -45,6 +49,8 @@ static void parse_vmflags(char *buf, unsigned long *flags, unsigned long *madv)
*flags |= MAP_NORESERVE;
else if (_vmflag_match(tok, "ht"))
*flags |= MAP_HUGETLB;
else if (_vmflag_match(tok, "dp"))
*flags |= MAP_DROPPABLE;
/* madvise() block */
if (_vmflag_match(tok, "sr"))

20
test/zdtm/static/maps02.c
View File

@ -2,6 +2,10 @@
#include "zdtmtst.h"
#include "get_smaps_bits.h"
#ifndef MAP_DROPPABLE
#define MAP_DROPPABLE 0x08
#endif
#ifndef MADV_DONTDUMP
#define MADV_DONTDUMP 16
#endif
@ -27,8 +31,14 @@ static int alloc_anon_mmap(struct mmap_data *m, int flags, int adv)
{
m->start = mmap(NULL, MEM_SIZE, PROT_READ | PROT_WRITE, flags, -1, 0);
if (m->start == MAP_FAILED) {
pr_perror("mmap failed");
return -1;
if (errno == EINVAL) {
test_msg("mmap failed, no kernel support\n");
*m = (struct mmap_data){};
return 0;
} else {
pr_perror("mmap failed");
return -1;
}
}
if (madvise(m->start, MEM_SIZE, adv)) {
@ -47,7 +57,7 @@ static int alloc_anon_mmap(struct mmap_data *m, int flags, int adv)
int main(int argc, char **argv)
{
struct mmap_data m[6] = {};
struct mmap_data m[7] = {};
size_t i;
test_init(argc, argv);
@ -76,6 +86,10 @@ int main(int argc, char **argv)
if (alloc_anon_mmap(&m[5], MAP_PRIVATE | MAP_ANONYMOUS, MADV_WIPEONFORK))
return -1;
test_msg("Alloc droppable\n");
if (alloc_anon_mmap(&m[6], MAP_DROPPABLE | MAP_ANONYMOUS, MADV_NORMAL))
return -1;
test_msg("Fetch existing flags/adv\n");
for (i = 0; i < sizeof(m) / sizeof(m[0]); i++) {
if (get_smaps_bits((unsigned long)m[i].start, &m[i].orig_flags, &m[i].orig_madv))