/*
* is l2 fully contained in l1?
* start1 end1
* [----------------------------------)
* start2 end2
* [----------------)
*/
static inline int
lo_seg_contained(struct pnfs_layout_range *l1,
struct pnfs_layout_range *l2)
{
u64 start1 = l1->offset;
u64 end1 = end_offset(start1, l1->length);
u64 start2 = l2->offset;
u64 end2 = end_offset(start2, l2->length);
return (start1 <= start2) && (end1 >= end2);
}
/*
* is l2 fully contained in l1?
* start1 end1
* [----------------------------------)
* start2 end2
* [----------------)
*/
static bool
pnfs_lseg_range_contained(const struct pnfs_layout_range *l1,
const struct pnfs_layout_range *l2)
{
u64 start1 = l1->offset;
u64 end1 = end_offset(start1, l1->length);
u64 start2 = l2->offset;
u64 end2 = end_offset(start2, l2->length);
return (start1 <= start2) && (end1 >= end2);
}
/*
* is l1 and l2 intersecting?
* start1 end1
* [----------------------------------)
* start2 end2
* [----------------)
*/
static inline int
lo_seg_intersecting(struct pnfs_layout_range *l1,
struct pnfs_layout_range *l2)
{
u64 start1 = l1->offset;
u64 end1 = end_offset(start1, l1->length);
u64 start2 = l2->offset;
u64 end2 = end_offset(start2, l2->length);
return (end1 == NFS4_MAX_UINT64 || end1 > start2) &&
(end2 == NFS4_MAX_UINT64 || end2 > start1);
}
void CompiledMethod::shrink(jint code_size, jint relocation_size) {
// The current implementation copies the relocation information down
// and "shrinks" the compiled method object in place, allocating a
// dummy filler object in the now unused end part.
//
// The compiled method object will generally not be the last object in
// the heap, since the compiler allocates other objects and GC might
// have occurred. However, if the GC always does sliding compaction
// and the compiler *guarantees* not to hold on to any allocated
// object other than the compiled method, we could simply move the
// top of the object heap down!
// Copy the relocation segment down
void* src = field_base(end_offset() - relocation_size);
void* dst = field_base(base_offset() + code_size);
GUARANTEE(src >= dst, "should be copying down");
jvm_memmove(dst, src, relocation_size); // possibly overlapping regions
// Shrink compiled method object
size_t new_size = CompiledMethodDesc::allocation_size(code_size +
relocation_size);
Universe::shrink_object(this, new_size);
((CompiledMethodDesc*) obj())->set_size(code_size + relocation_size);
GUARANTEE(object_size() == new_size, "invalid shrunk size");
}
static struct objlayout_io_state *
objlayout_alloc_io_state(struct pnfs_layout_hdr *pnfs_layout_type,
struct page **pages,
unsigned pgbase,
loff_t offset,
size_t count,
struct pnfs_layout_segment *lseg,
void *rpcdata,
gfp_t gfp_flags)
{
struct objlayout_io_state *state;
u64 lseg_end_offset;
dprintk("%s: allocating io_state\n", __func__);
if (objio_alloc_io_state(lseg, &state, gfp_flags))
return NULL;
BUG_ON(offset < lseg->pls_range.offset);
lseg_end_offset = end_offset(lseg->pls_range.offset,
lseg->pls_range.length);
BUG_ON(offset >= lseg_end_offset);
if (offset + count > lseg_end_offset) {
count = lseg->pls_range.length -
(offset - lseg->pls_range.offset);
dprintk("%s: truncated count %Zd\n", __func__, count);
}
if (pgbase > PAGE_SIZE) {
pages += pgbase >> PAGE_SHIFT;
pgbase &= ~PAGE_MASK;
}
static void _fix_verify_io_params(struct pnfs_layout_segment *lseg,
struct page ***p_pages, unsigned *p_pgbase,
u64 offset, unsigned long count)
{
u64 lseg_end_offset;
BUG_ON(offset < lseg->pls_range.offset);
lseg_end_offset = end_offset(lseg->pls_range.offset,
lseg->pls_range.length);
BUG_ON(offset >= lseg_end_offset);
WARN_ON(offset + count > lseg_end_offset);
if (*p_pgbase > PAGE_SIZE) {
dprintk("%s: pgbase(0x%x) > PAGE_SIZE\n", __func__, *p_pgbase);
*p_pages += *p_pgbase >> PAGE_SHIFT;
*p_pgbase &= ~PAGE_MASK;
}
bool CompiledMethod::expand_compiled_code_space(int delta, int relocation_size) {
if (ObjectHeap::expand_current_compiled_method(delta)) {
if (Verbose) {
TTY_TRACE_CR(("Expanding compiled method from %d to %d bytes",
size(), size() + delta));
}
void* src = field_base(end_offset() - relocation_size);
void* dst = DERIVED(void*, src, delta);
GUARANTEE(src < dst, "should be copying up");
jvm_memmove(dst, src, relocation_size); // possibly overlapping regions
// It's probably OK only to clear dst[-1], but let's just make sure.
jvm_memset(src, 0, delta);
((CompiledMethodDesc*) obj())->set_size(size() + delta);
if (VerifyGC > 2) {
ObjectHeap::verify();
}
return true;
} else {
return false;
