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/* { dg-do run } */
/* { dg-additional-options -DOFFLOAD_DEVICE_NVPTX { target offload_device_nvptx } } */
/* Test that pinned memory fails correctly. */
#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 (int size)
{
}
#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 ()
{
#ifdef OFFLOAD_DEVICE_NVPTX
/* Go big or go home.
The OS ulimit does not affect memory locked via CUDA for NVPTX devices. */
const int SIZE = 40 * 1024 * 1024;
#else
/* This needs to be large enough to cover multiple pages. */
const int SIZE = PAGE_SIZE * 4;
#endif
const int PIN_LIMIT = PAGE_SIZE * 2;
/* Pinned memory, no fallback. */
const omp_alloctrait_t traits1[] = {
{ omp_atk_pinned, 1 },
{ omp_atk_fallback, omp_atv_null_fb }
};
omp_allocator_handle_t allocator1 = omp_init_allocator (omp_default_mem_space,
2, traits1);
/* Pinned memory, plain memory fallback. */
const omp_alloctrait_t traits2[] = {
{ omp_atk_pinned, 1 },
{ omp_atk_fallback, omp_atv_default_mem_fb }
};
omp_allocator_handle_t allocator2 = omp_init_allocator (omp_default_mem_space,
2, 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 (PIN_LIMIT);
// Sanity check
if (get_pinned_mem () != 0)
abort ();
void *p1 = omp_alloc (SIZE, allocator1);
#ifdef OFFLOAD_DEVICE_NVPTX
// Doesn't care about 'set_pin_limit'.
if (!p1)
abort ();
#else
// Should fail
if (p1)
abort ();
#endif
void *p2 = omp_calloc (1, SIZE, allocator1);
#ifdef OFFLOAD_DEVICE_NVPTX
// Doesn't care about 'set_pin_limit'.
if (!p2)
abort ();
#else
// Should fail
if (p2)
abort ();
#endif
void *p3 = omp_alloc (SIZE, allocator2);
if (!p3)
abort ();
// Should fall back
void *p4 = omp_calloc (1, SIZE, allocator2);
if (!p4)
abort ();
verify0 (p4, SIZE);
void *notpinned = omp_alloc (SIZE, omp_default_mem_alloc);
void *p5 = omp_realloc (notpinned, SIZE, allocator1, omp_default_mem_alloc);
#ifdef OFFLOAD_DEVICE_NVPTX
// Doesn't care about 'set_pin_limit'; does reallocate.
if (!notpinned || !p5 || p5 == notpinned)
abort ();
#else
// Should fail to realloc
if (!notpinned || p5)
abort ();
#endif
#ifdef OFFLOAD_DEVICE_NVPTX
void *p6 = omp_realloc (p5, SIZE, allocator2, allocator1);
// Does reallocate.
if (p5 == p6)
abort ();
#else
void *p6 = omp_realloc (notpinned, SIZE, allocator2, omp_default_mem_alloc);
// Should fall back to no realloc needed
if (p6 != notpinned)
abort ();
#endif
// No memory should have been pinned
int amount = get_pinned_mem ();
if (amount != 0)
abort ();
// Ensure free works correctly
if (p1) omp_free (p1, allocator1);
if (p2) omp_free (p2, allocator1);
if (p3) omp_free (p3, allocator2);
if (p4) omp_free (p4, allocator2);
// p5 and notpinned have been reallocated
if (p6) omp_free (p6, omp_default_mem_alloc);
return 0;
}
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