libgomp: autodetect page sizes in pinned memory tests

There's not one number that works everywhere.
This also fixes the failure mode on non-Linux hosts.

libgomp/ChangeLog:

	* testsuite/libgomp.c/alloc-pinned-1.c: Autodetect page size.
	* testsuite/libgomp.c/alloc-pinned-2.c: Likewise.
	* testsuite/libgomp.c/alloc-pinned-3.c: Likewise.
	* testsuite/libgomp.c/alloc-pinned-4.c: Likewise.
	* testsuite/libgomp.c/alloc-pinned-5.c: Likewise.
	* testsuite/libgomp.c/alloc-pinned-6.c: Likewise.
	* testsuite/libgomp.c/alloc-pinned-7.c: Clean up.

diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-1.c b/libgomp/testsuite/libgomp.c/alloc-pinned-1.c
index 0a6360cda29..79792b16d83 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-1.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-1.c
@@ -4,13 +4,23 @@
 
 /* Test that pinned memory works.  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
+#include <sys/resource.h>
+
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+#define CHECK_SIZE(SIZE) { \
+  struct rlimit limit; \
+  if (getrlimit (RLIMIT_MEMLOCK, &limit) \
+      || limit.rlim_cur <= SIZE) \
+    fprintf (stderr, "unsufficient lockable memory; please increase ulimit\n"); \
+  }
 
 int
 get_pinned_mem ()
@@ -34,6 +44,9 @@ get_pinned_mem ()
   abort ();
 }
 #else
+#define PAGE_SIZE 1 /* unknown */
+#define CHECK_SIZE(SIZE) fprintf (stderr, "OS unsupported\n");
+
 int
 get_pinned_mem ()
 {
@@ -43,12 +56,13 @@ get_pinned_mem ()
 
 #include <omp.h>
 
-/* Allocate more than a page each time, but stay within the ulimit.  */
-#define SIZE 10*1024
-
 int
 main ()
 {
+  /* Allocate at least a page each time, but stay within the ulimit.  */
+  const int SIZE = PAGE_SIZE;
+  CHECK_SIZE (SIZE*3);
+
   const omp_alloctrait_t traits[] = {
       { omp_atk_pinned, 1 }
   };
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-2.c b/libgomp/testsuite/libgomp.c/alloc-pinned-2.c
index 8fdb4ff5cfd..228c656b715 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-2.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-2.c
@@ -4,13 +4,23 @@
 
 /* Test that pinned memory works (pool_size code path).  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
+#include <sys/resource.h>
+
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+#define CHECK_SIZE(SIZE) { \
+  struct rlimit limit; \
+  if (getrlimit (RLIMIT_MEMLOCK, &limit) \
+      || limit.rlim_cur <= SIZE) \
+    fprintf (stderr, "unsufficient lockable memory; please increase ulimit\n"); \
+  }
 
 int
 get_pinned_mem ()
@@ -34,6 +44,9 @@ get_pinned_mem ()
   abort ();
 }
 #else
+#define PAGE_SIZE 1 /* unknown */
+#define CHECK_SIZE(SIZE) fprintf (stderr, "OS unsupported\n");
+
 int
 get_pinned_mem ()
 {
@@ -43,12 +56,13 @@ get_pinned_mem ()
 
 #include <omp.h>
 
-/* Allocate more than a page each time, but stay within the ulimit.  */
-#define SIZE 10*1024
-
 int
 main ()
 {
+  /* Allocate at least a page each time, but stay within the ulimit.  */
+  const int SIZE = PAGE_SIZE;
+  CHECK_SIZE (SIZE*3);
+
   const omp_alloctrait_t traits[] = {
       { omp_atk_pinned, 1 },
       { omp_atk_pool_size, SIZE*8 }
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-3.c b/libgomp/testsuite/libgomp.c/alloc-pinned-3.c
index 943dfea5c9b..90539ffe3e0 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-3.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-3.c
@@ -2,15 +2,18 @@
 
 /* Test that pinned memory fails correctly.  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
 #include <sys/resource.h>
 
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+
 int
 get_pinned_mem ()
 {
@@ -45,6 +48,8 @@ set_pin_limit (int size)
 }
 #else
 int
+#define PAGE_SIZE 10000*1024 /* unknown */
+
 get_pinned_mem ()
 {
   return 0;
@@ -58,12 +63,12 @@ set_pin_limit ()
 
 #include <omp.h>
 
-/* This should be large enough to cover multiple pages.  */
-#define SIZE 10000*1024
-
 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 },
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-4.c b/libgomp/testsuite/libgomp.c/alloc-pinned-4.c
index d9cb8dfe1fd..534e49eefc4 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-4.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-4.c
@@ -2,15 +2,18 @@
 
 /* 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 <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
 #include <sys/resource.h>
 
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+
 int
 get_pinned_mem ()
 {
@@ -45,6 +48,8 @@ set_pin_limit (int size)
 }
 #else
 int
+#define PAGE_SIZE 10000*1024 /* unknown */
+
 get_pinned_mem ()
 {
   return 0;
@@ -58,12 +63,12 @@ set_pin_limit ()
 
 #include <omp.h>
 
-/* This should be large enough to cover multiple pages.  */
-#define SIZE 10000*1024
-
 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 },
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-5.c b/libgomp/testsuite/libgomp.c/alloc-pinned-5.c
index 8355ca83790..315c7161a39 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-5.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-5.c
@@ -4,13 +4,23 @@
 
 /* Test that ompx_pinned_mem_alloc works.  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
+#include <sys/resource.h>
+
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+#define CHECK_SIZE(SIZE) { \
+  struct rlimit limit; \
+  if (getrlimit (RLIMIT_MEMLOCK, &limit) \
+      || limit.rlim_cur <= SIZE) \
+    fprintf (stderr, "unsufficient lockable memory; please increase ulimit\n"); \
+  }
 
 int
 get_pinned_mem ()
@@ -34,6 +44,9 @@ get_pinned_mem ()
   abort ();
 }
 #else
+#define PAGE_SIZE 1 /* unknown */
+#define CHECK_SIZE(SIZE) fprintf (stderr, "OS unsupported\n");
+
 int
 get_pinned_mem ()
 {
@@ -43,12 +56,13 @@ get_pinned_mem ()
 
 #include <omp.h>
 
-/* Allocate more than a page each time, but stay within the ulimit.  */
-#define SIZE 10*1024
-
 int
 main ()
 {
+  /* Allocate at least a page each time, but stay within the ulimit.  */
+  const int SIZE = PAGE_SIZE;
+  CHECK_SIZE (SIZE*3);
+
   // Sanity check
   if (get_pinned_mem () != 0)
     abort ();
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-6.c b/libgomp/testsuite/libgomp.c/alloc-pinned-6.c
index 80fd37ab875..bbe20c04875 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-6.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-6.c
@@ -2,15 +2,18 @@
 
 /* Test that ompx_pinned_mem_alloc fails correctly.  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
 #include <sys/resource.h>
 
+#define PAGE_SIZE sysconf(_SC_PAGESIZE)
+
 int
 get_pinned_mem ()
 {
@@ -44,6 +47,8 @@ set_pin_limit (int size)
     abort ();
 }
 #else
+#define PAGE_SIZE 10000*1024 /* unknown */
+
 int
 get_pinned_mem ()
 {
@@ -58,12 +63,12 @@ set_pin_limit ()
 
 #include <omp.h>
 
-/* This should be large enough to cover multiple pages.  */
-#define SIZE 10000*1024
-
 int
 main ()
 {
+  /* Allocate at least a page each time, but stay within the ulimit.  */
+  const int SIZE = PAGE_SIZE*4;
+
   /* Ensure that the limit is smaller than the allocation.  */
   set_pin_limit (SIZE/2);
 
diff --git a/libgomp/testsuite/libgomp.c/alloc-pinned-7.c b/libgomp/testsuite/libgomp.c/alloc-pinned-7.c
index 6fd19b46a5c..8dc19055038 100644
--- a/libgomp/testsuite/libgomp.c/alloc-pinned-7.c
+++ b/libgomp/testsuite/libgomp.c/alloc-pinned-7.c
@@ -5,11 +5,12 @@
 
 /* Test that pinned memory works.  */
 
+#include <stdio.h>
+#include <stdlib.h>
+
 #ifdef __linux__
 #include <sys/types.h>
 #include <unistd.h>
-#include <stdio.h>
-#include <stdlib.h>
 
 #include <sys/mman.h>
 
@@ -28,7 +29,6 @@ get_pinned_mem ()
       int val;
       if (sscanf (buf, "VmLck: %d", &val))
 	{
-	  printf ("lock %d\n", val);
 	  fclose (proc);
 	  return val;
 	}
@@ -47,9 +47,6 @@ get_pinned_mem ()
 
 #include <omp.h>
 
-/* Allocate more than a page each time, but stay within the ulimit.  */
-#define SIZE 10*1024
-
 int
 main ()
 {