/**
* External allocation slow path (called by superclass when slow path is actually taken. This is
* necessary (rather than a direct call from the fast path) because of the possibility of a thread
* switch and corresponding re-association of bump pointers to kernel threads.
*
* @param bytes The number of bytes allocated
* @param align The requested alignment
* @param offset The offset from the alignment
* @return The address of the first byte of the allocated region or zero on failure
*/
protected final Address allocSlowOnce(int bytes, int align, int offset) {
Address ptr = space.getSpace(hot, copy, lineUseCount);
if (ptr.isZero()) {
lineUseCount = 0;
return ptr; // failed allocation --- we will need to GC
}
/* we have been given a clean block */
if (VM.VERIFY_ASSERTIONS) VM.assertions._assert(Block.isAligned(ptr));
lineUseCount = LINES_IN_BLOCK;
zeroBlock(ptr);
if (requestForLarge) {
largeCursor = ptr;
largeLimit = ptr.plus(BYTES_IN_BLOCK);
} else {
cursor = ptr;
limit = ptr.plus(BYTES_IN_BLOCK);
}
return alloc(bytes, align, offset);
}
