// The last collection bailed out, we are running out of heap space,
// so we try to allocate the from-space, too.
HeapWord* DefNewGeneration::allocate_from_space(size_t size) {
HeapWord* result = NULL;
if (Verbose && PrintGCDetails) {
gclog_or_tty->print("DefNewGeneration::allocate_from_space(%u):"
" will_fail: %s"
" heap_lock: %s"
" free: " SIZE_FORMAT,
size,
GenCollectedHeap::heap()->incremental_collection_will_fail(false /* don't consult_young */) ?
"true" : "false",
Heap_lock->is_locked() ? "locked" : "unlocked",
from()->free());
}
if (should_allocate_from_space() || GC_locker::is_active_and_needs_gc()) {
if (Heap_lock->owned_by_self() ||
(SafepointSynchronize::is_at_safepoint() &&
Thread::current()->is_VM_thread())) {
// If the Heap_lock is not locked by this thread, this will be called
// again later with the Heap_lock held.
result = from()->allocate(size);
} else if (PrintGC && Verbose) {
gclog_or_tty->print_cr(" Heap_lock is not owned by self");
}
} else if (PrintGC && Verbose) {
gclog_or_tty->print_cr(" should_allocate_from_space: NOT");
}
if (PrintGC && Verbose) {
gclog_or_tty->print_cr(" returns %s", result == NULL ? "NULL" : "object");
}
return result;
}
// The last collection bailed out, we are running out of heap space,
// so we try to allocate the from-space, too.
HeapWord* DefNewGeneration::allocate_from_space(size_t size) {
bool should_try_alloc = should_allocate_from_space() || GC_locker::is_active_and_needs_gc();
// If the Heap_lock is not locked by this thread, this will be called
// again later with the Heap_lock held.
bool do_alloc = should_try_alloc && (Heap_lock->owned_by_self() || (SafepointSynchronize::is_at_safepoint() && Thread::current()->is_VM_thread()));
HeapWord* result = NULL;
if (do_alloc) {
result = from()->allocate(size);
}
log_trace(gc, alloc)("DefNewGeneration::allocate_from_space(" SIZE_FORMAT "): will_fail: %s heap_lock: %s free: " SIZE_FORMAT "%s%s returns %s",
size,
GenCollectedHeap::heap()->incremental_collection_will_fail(false /* don't consult_young */) ?
"true" : "false",
Heap_lock->is_locked() ? "locked" : "unlocked",
from()->free(),
should_try_alloc ? "" : " should_allocate_from_space: NOT",
do_alloc ? " Heap_lock is not owned by self" : "",
result == NULL ? "NULL" : "object");
return result;
}
