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7009641: Don't fail VM when CodeCache is full

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Allocation in the code cache returns NULL instead of failing the entire VM

Reviewed-by: kvn, iveresov
This commit is contained in:
Albert Noll 2013-09-24 15:56:25 +02:00
parent c368a33bf7
commit a2889becd9
7 changed files with 54 additions and 9 deletions
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11
hotspot/src/share/vm/code/vtableStubs.cpp
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@ -46,12 +46,9 @@ address VtableStub::_chunk = NULL;
address VtableStub::_chunk_end = NULL;
VMReg VtableStub::_receiver_location = VMRegImpl::Bad();
static int num_vtable_chunks = 0;
void* VtableStub::operator new(size_t size, int code_size) throw() {
assert(size == sizeof(VtableStub), "mismatched size");
num_vtable_chunks++;
// compute real VtableStub size (rounded to nearest word)
const int real_size = round_to(code_size + sizeof(VtableStub), wordSize);
// malloc them in chunks to minimize header overhead
@ -60,7 +57,7 @@ void* VtableStub::operator new(size_t size, int code_size) throw() {
const int bytes = chunk_factor * real_size + pd_code_alignment();
BufferBlob* blob = BufferBlob::create("vtable chunks", bytes);
if (blob == NULL) {
vm_exit_out_of_memory(bytes, OOM_MALLOC_ERROR, "CodeCache: no room for vtable chunks");
return NULL;
}
_chunk = blob->content_begin();
_chunk_end = _chunk + bytes;
@ -121,6 +118,12 @@ address VtableStubs::find_stub(bool is_vtable_stub, int vtable_index) {
} else {
s = create_itable_stub(vtable_index);
}
// Creation of vtable or itable can fail if there is not enough free space in the code cache.
if (s == NULL) {
return NULL;
}
enter(is_vtable_stub, vtable_index, s);
if (PrintAdapterHandlers) {
tty->print_cr("Decoding VtableStub %s[%d]@%d",