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/* { dg-do run } */
/* Test that pinned memory fails correctly, pool_size code path. */
#include <stdio.h>
#include <stdlib.h>
#ifdef __linux__
#include <sys/types.h>
#include <unistd.h>
#include <sys/mman.h>
#include <sys/resource.h>
#define PAGE_SIZE sysconf(_SC_PAGESIZE)
int
get_pinned_mem ()
{
int pid = getpid ();
char buf[100];
sprintf (buf, "/proc/%d/status", pid);
FILE *proc = fopen (buf, "r");
if (!proc)
abort ();
while (fgets (buf, 100, proc))
{
int val;
if (sscanf (buf, "VmLck: %d", &val))
{
fclose (proc);
return val;
}
}
abort ();
}
void
set_pin_limit (int size)
{
struct rlimit limit;
if (getrlimit (RLIMIT_MEMLOCK, &limit))
abort ();
limit.rlim_cur = (limit.rlim_max < size ? limit.rlim_max : size);
if (setrlimit (RLIMIT_MEMLOCK, &limit))
abort ();
}
#else
#define PAGE_SIZE 10000 * 1024 /* unknown */
#define EXPECT_OMP_NULL_ALLOCATOR
int
get_pinned_mem ()
{
return 0;
}
void
set_pin_limit ()
{
}
#endif
static void
verify0 (char *p, size_t s)
{
for (size_t i = 0; i < s; ++i)
if (p[i] != 0)
abort ();
}
#include <omp.h>
int
main ()
{
/* This needs to be large enough to cover multiple pages. */
const int SIZE = PAGE_SIZE * 4;
/* Pinned memory, no fallback. */
const omp_alloctrait_t traits1[] = {
{ omp_atk_pinned, 1 },
{ omp_atk_fallback, omp_atv_null_fb },
{ omp_atk_pool_size, SIZE * 8 }
};
omp_allocator_handle_t allocator1 = omp_init_allocator (omp_default_mem_space,
3, traits1);
/* Pinned memory, plain memory fallback. */
const omp_alloctrait_t traits2[] = {
{ omp_atk_pinned, 1 },
{ omp_atk_fallback, omp_atv_default_mem_fb },
{ omp_atk_pool_size, SIZE * 8 }
};
omp_allocator_handle_t allocator2 = omp_init_allocator (omp_default_mem_space,
3, traits2);
#ifdef EXPECT_OMP_NULL_ALLOCATOR
if (allocator1 == omp_null_allocator
&& allocator2 == omp_null_allocator)
return 0;
#endif
/* Ensure that the limit is smaller than the allocation. */
set_pin_limit (SIZE / 2);
// Sanity check
if (get_pinned_mem () != 0)
abort ();
// Should fail
void *p = omp_alloc (SIZE, allocator1);
if (p)
abort ();
// Should fail
p = omp_calloc (1, SIZE, allocator1);
if (p)
abort ();
// Should fall back
p = omp_alloc (SIZE, allocator2);
if (!p)
abort ();
// Should fall back
p = omp_calloc (1, SIZE, allocator2);
if (!p)
abort ();
verify0 (p, SIZE);
// Should fail to realloc
void *notpinned = omp_alloc (SIZE, omp_default_mem_alloc);
p = omp_realloc (notpinned, SIZE, allocator1, omp_default_mem_alloc);
if (!notpinned || p)
abort ();
// Should fall back to no realloc needed
p = omp_realloc (notpinned, SIZE, allocator2, omp_default_mem_alloc);
if (p != notpinned)
abort ();
// No memory should have been pinned
int amount = get_pinned_mem ();
if (amount != 0)
abort ();
return 0;
}
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