/* -----------------------------------------------------------------------------
- * $Id: MBlock.c,v 1.40 2002/11/22 07:43:30 matthewc Exp $
+ * $Id: MBlock.c,v 1.50 2003/10/31 16:21:27 sof Exp $
*
* (c) The GHC Team 1998-1999
*
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
// the mmap() interface.
static void *
-my_mmap (void *addr, int size)
+my_mmap (void *addr, lnat size)
{
void *ret;
-#ifdef solaris2_TARGET_OS
+#if defined(solaris2_TARGET_OS) || defined(irix_TARGET_OS)
{
int fd = open("/dev/zero",O_RDONLY);
ret = mmap(addr, size, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
#endif
if (ret == (void *)-1) {
- if (errno == ENOMEM) {
- barf("out of memory (requested %d bytes)", size);
+ if (errno == ENOMEM ||
+ (errno == EINVAL && sizeof(void*)==4 && size >= 0xc0000000)) {
+ // If we request more than 3Gig, then we get EINVAL
+ // instead of ENOMEM (at least on Linux).
+ prog_belch("out of memory (requested %d bytes)", size);
+ stg_exit(EXIT_FAILURE);
} else {
- barf("getMBlock: mmap failed");
+ barf("getMBlock: mmap: %s", strerror(errno));
}
}
// mblocks.
static void *
-gen_map_mblocks (int size)
+gen_map_mblocks (lnat size)
{
int slop;
void *ret;
// unmap the slop bits around the chunk we allocated
slop = (W_)ret & MBLOCK_MASK;
-
+
if (munmap(ret, MBLOCK_SIZE - slop) == -1) {
- barf("gen_map_mblocks: munmap failed");
+ barf("gen_map_mblocks: munmap failed");
}
if (slop > 0 && munmap(ret+size-slop, slop) == -1) {
- barf("gen_map_mblocks: munmap failed");
+ barf("gen_map_mblocks: munmap failed");
}
-
+
// ToDo: if we happened to get an aligned block, then don't
- // unmap the excess, just use it.
+ // unmap the excess, just use it. For this to work, you
+ // need to keep in mind the following:
+ // * Calling my_mmap() with an 'addr' arg pointing to
+ // already my_mmap()ed space is OK and won't fail.
+ // * If my_mmap() can't satisfy the request at the
+ // given 'next_request' address in getMBlocks(), that
+ // you unmap the extra mblock mmap()ed here (or simply
+ // satisfy yourself that the slop introduced isn't worth
+ // salvaging.)
+ //
// next time, try after the block we just got.
ret += MBLOCK_SIZE - slop;
if (((W_)ret & MBLOCK_MASK) != 0) {
// misaligned block!
-#ifdef DEBUG
+#if 0 // defined(DEBUG)
belch("warning: getMBlock: misaligned block %p returned when allocating %d megablock(s) at %p", ret, n, next_request);
#endif
-
+
// unmap this block...
if (munmap(ret, size) == -1) {
barf("getMBlock: munmap failed");
static char* base_mblocks = (char*)0;
static char* next_request = (char*)0;
void* ret = (void*)0;
- int i;
+ nat i;
lnat size = MBLOCK_SIZE * n;
if ( (base_non_committed == 0) || (next_request + size > end_non_committed) ) {
if (base_non_committed) {
- barf("RTS exhausted max heap size (%d bytes)\n", size_reserved_pool);
+ /* Tacky, but if no user-provided -M option is in effect,
+ * set it to the default (==256M) in time for the heap overflow PSA.
+ */
+ if (RtsFlags.GcFlags.maxHeapSize == 0) {
+ RtsFlags.GcFlags.maxHeapSize = size_reserved_pool / BLOCK_SIZE;
+ }
+ heapOverflow();
}
if (RtsFlags.GcFlags.maxHeapSize != 0) {
size_reserved_pool = BLOCK_SIZE * RtsFlags.GcFlags.maxHeapSize;
// fill in the table
for (i = 0; i < n; i++) {
- mblockIsHeap( ret + i * MBLOCK_SIZE );
+ MARK_HEAP_ALLOCED ( ret + i * MBLOCK_SIZE );
}
return ret;