181 lines
6.7 KiB
C++
181 lines
6.7 KiB
C++
/*
|
|
* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved.
|
|
* 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
|
|
* or visit www.oracle.com if you need additional information or have any
|
|
* questions.
|
|
*
|
|
*/
|
|
|
|
#include "precompiled.hpp"
|
|
#include "asm/macroAssembler.inline.hpp"
|
|
#include "code/compiledIC.hpp"
|
|
#include "code/icBuffer.hpp"
|
|
#include "code/nmethod.hpp"
|
|
#include "memory/resourceArea.hpp"
|
|
#include "runtime/mutexLocker.hpp"
|
|
#include "runtime/safepoint.hpp"
|
|
|
|
// Release the CompiledICHolder* associated with this call site is there is one.
|
|
void CompiledIC::cleanup_call_site(virtual_call_Relocation* call_site) {
|
|
// This call site might have become stale so inspect it carefully.
|
|
NativeCall* call = nativeCall_at(call_site->addr());
|
|
if (is_icholder_entry(call->destination())) {
|
|
NativeMovConstReg* value = nativeMovConstReg_at(call_site->cached_value());
|
|
InlineCacheBuffer::queue_for_release((CompiledICHolder*)value->data());
|
|
}
|
|
}
|
|
|
|
bool CompiledIC::is_icholder_call_site(virtual_call_Relocation* call_site) {
|
|
// This call site might have become stale so inspect it carefully.
|
|
NativeCall* call = nativeCall_at(call_site->addr());
|
|
return is_icholder_entry(call->destination());
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// High-level access to an inline cache. Guaranteed to be MT-safe.
|
|
|
|
CompiledIC::CompiledIC(nmethod* nm, NativeCall* call)
|
|
: _ic_call(call)
|
|
{
|
|
address ic_call = call->instruction_address();
|
|
|
|
assert(ic_call != NULL, "ic_call address must be set");
|
|
assert(nm != NULL, "must pass nmethod");
|
|
assert(nm->contains(ic_call), "must be in nmethod");
|
|
|
|
// Search for the ic_call at the given address.
|
|
RelocIterator iter(nm, ic_call, ic_call+1);
|
|
bool ret = iter.next();
|
|
assert(ret == true, "relocInfo must exist at this address");
|
|
assert(iter.addr() == ic_call, "must find ic_call");
|
|
if (iter.type() == relocInfo::virtual_call_type) {
|
|
virtual_call_Relocation* r = iter.virtual_call_reloc();
|
|
_is_optimized = false;
|
|
_value = nativeMovConstReg_at(r->cached_value());
|
|
} else {
|
|
assert(iter.type() == relocInfo::opt_virtual_call_type, "must be a virtual call");
|
|
_is_optimized = true;
|
|
_value = NULL;
|
|
}
|
|
}
|
|
|
|
// ----------------------------------------------------------------------------
|
|
|
|
#define __ _masm.
|
|
void CompiledStaticCall::emit_to_interp_stub(CodeBuffer &cbuf) {
|
|
// Stub is fixed up when the corresponding call is converted from
|
|
// calling compiled code to calling interpreted code.
|
|
// movq rbx, 0
|
|
// jmp -5 # to self
|
|
|
|
address mark = cbuf.insts_mark(); // Get mark within main instrs section.
|
|
|
|
// Note that the code buffer's insts_mark is always relative to insts.
|
|
// That's why we must use the macroassembler to generate a stub.
|
|
MacroAssembler _masm(&cbuf);
|
|
|
|
address base =
|
|
__ start_a_stub(to_interp_stub_size()*2);
|
|
if (base == NULL) return; // CodeBuffer::expand failed.
|
|
// Static stub relocation stores the instruction address of the call.
|
|
__ relocate(static_stub_Relocation::spec(mark), Assembler::imm_operand);
|
|
// Static stub relocation also tags the Method* in the code-stream.
|
|
__ mov_metadata(rbx, (Metadata*) NULL); // Method is zapped till fixup time.
|
|
// This is recognized as unresolved by relocs/nativeinst/ic code.
|
|
__ jump(RuntimeAddress(__ pc()));
|
|
|
|
// Update current stubs pointer and restore insts_end.
|
|
__ end_a_stub();
|
|
}
|
|
#undef __
|
|
|
|
int CompiledStaticCall::to_interp_stub_size() {
|
|
return NOT_LP64(10) // movl; jmp
|
|
LP64_ONLY(15); // movq (1+1+8); jmp (1+4)
|
|
}
|
|
|
|
// Relocation entries for call stub, compiled java to interpreter.
|
|
int CompiledStaticCall::reloc_to_interp_stub() {
|
|
return 4; // 3 in emit_to_interp_stub + 1 in emit_call
|
|
}
|
|
|
|
void CompiledStaticCall::set_to_interpreted(methodHandle callee, address entry) {
|
|
address stub = find_stub();
|
|
guarantee(stub != NULL, "stub not found");
|
|
|
|
if (TraceICs) {
|
|
ResourceMark rm;
|
|
tty->print_cr("CompiledStaticCall@" INTPTR_FORMAT ": set_to_interpreted %s",
|
|
instruction_address(),
|
|
callee->name_and_sig_as_C_string());
|
|
}
|
|
|
|
// Creation also verifies the object.
|
|
NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
|
|
NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
|
|
|
|
assert(method_holder->data() == 0 || method_holder->data() == (intptr_t)callee(),
|
|
"a) MT-unsafe modification of inline cache");
|
|
assert(jump->jump_destination() == (address)-1 || jump->jump_destination() == entry,
|
|
"b) MT-unsafe modification of inline cache");
|
|
|
|
// Update stub.
|
|
method_holder->set_data((intptr_t)callee());
|
|
jump->set_jump_destination(entry);
|
|
|
|
// Update jump to call.
|
|
set_destination_mt_safe(stub);
|
|
}
|
|
|
|
void CompiledStaticCall::set_stub_to_clean(static_stub_Relocation* static_stub) {
|
|
assert (CompiledIC_lock->is_locked() || SafepointSynchronize::is_at_safepoint(), "mt unsafe call");
|
|
// Reset stub.
|
|
address stub = static_stub->addr();
|
|
assert(stub != NULL, "stub not found");
|
|
// Creation also verifies the object.
|
|
NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
|
|
NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
|
|
method_holder->set_data(0);
|
|
jump->set_jump_destination((address)-1);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Non-product mode code
|
|
#ifndef PRODUCT
|
|
|
|
void CompiledStaticCall::verify() {
|
|
// Verify call.
|
|
NativeCall::verify();
|
|
if (os::is_MP()) {
|
|
verify_alignment();
|
|
}
|
|
|
|
// Verify stub.
|
|
address stub = find_stub();
|
|
assert(stub != NULL, "no stub found for static call");
|
|
// Creation also verifies the object.
|
|
NativeMovConstReg* method_holder = nativeMovConstReg_at(stub);
|
|
NativeJump* jump = nativeJump_at(method_holder->next_instruction_address());
|
|
|
|
// Verify state.
|
|
assert(is_clean() || is_call_to_compiled() || is_call_to_interpreted(), "sanity check");
|
|
}
|
|
|
|
#endif // !PRODUCT
|