6951784: Zero deoptimizer changes
Summary: The way Zero currently handles deoptimization can lead to methods being freed while they are still being executed.
Reviewed-by: twisti
Contributed-by: Gary Benson <gbenson@redhat.com>
/*
* Copyright 2003-2007 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 2007, 2008, 2009, 2010 Red Hat, Inc.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
#include "incls/_precompiled.incl"
#include "incls/_sharedRuntime_zero.cpp.incl"
DeoptimizationBlob *SharedRuntime::_deopt_blob;
SafepointBlob *SharedRuntime::_polling_page_safepoint_handler_blob;
SafepointBlob *SharedRuntime::_polling_page_return_handler_blob;
RuntimeStub *SharedRuntime::_wrong_method_blob;
RuntimeStub *SharedRuntime::_ic_miss_blob;
RuntimeStub *SharedRuntime::_resolve_opt_virtual_call_blob;
RuntimeStub *SharedRuntime::_resolve_virtual_call_blob;
RuntimeStub *SharedRuntime::_resolve_static_call_blob;
int SharedRuntime::java_calling_convention(const BasicType *sig_bt,
VMRegPair *regs,
int total_args_passed,
int is_outgoing) {
return 0;
}
AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(
MacroAssembler *masm,
int total_args_passed,
int comp_args_on_stack,
const BasicType *sig_bt,
const VMRegPair *regs,
AdapterFingerPrint *fingerprint) {
return AdapterHandlerLibrary::new_entry(
fingerprint,
ShouldNotCallThisStub(),
ShouldNotCallThisStub(),
ShouldNotCallThisStub());
}
nmethod *SharedRuntime::generate_native_wrapper(MacroAssembler *masm,
methodHandle method,
int total_in_args,
int comp_args_on_stack,
BasicType *in_sig_bt,
VMRegPair *in_regs,
BasicType ret_type) {
#ifdef SHARK
return SharkCompiler::compiler()->generate_native_wrapper(masm,
method,
in_sig_bt,
ret_type);
#else
ShouldNotCallThis();
#endif // SHARK
}
int Deoptimization::last_frame_adjust(int callee_parameters,
int callee_locals) {
return 0;
}
uint SharedRuntime::out_preserve_stack_slots() {
ShouldNotCallThis();
}
static RuntimeStub* generate_empty_runtime_stub(const char* name) {
CodeBuffer buffer(name, 0, 0);
return RuntimeStub::new_runtime_stub(name, &buffer, 0, 0, NULL, false);
}
static SafepointBlob* generate_empty_safepoint_blob() {
CodeBuffer buffer("handler_blob", 0, 0);
return SafepointBlob::create(&buffer, NULL, 0);
}
void SharedRuntime::generate_stubs() {
_wrong_method_blob =
generate_empty_runtime_stub("wrong_method_stub");
_ic_miss_blob =
generate_empty_runtime_stub("ic_miss_stub");
_resolve_opt_virtual_call_blob =
generate_empty_runtime_stub("resolve_opt_virtual_call");
_resolve_virtual_call_blob =
generate_empty_runtime_stub("resolve_virtual_call");
_resolve_static_call_blob =
generate_empty_runtime_stub("resolve_static_call");
_polling_page_safepoint_handler_blob =
generate_empty_safepoint_blob();
_polling_page_return_handler_blob =
generate_empty_safepoint_blob();
}
int SharedRuntime::c_calling_convention(const BasicType *sig_bt,
VMRegPair *regs,
int total_args_passed) {
ShouldNotCallThis();
}