jdk8-mips64-public/hotspot: src/cpu/x86/vm/compiledIC

src/cpu/x86/vm/compiledIC_x86.cpp@f90c822e73f8 (annotated)

src/cpu/x86/vm/compiledIC_x86.cpp

Wed, 27 Apr 2016 01:25:04 +0800

author: aoqi
date: Wed, 27 Apr 2016 01:25:04 +0800
changeset 0: f90c822e73f8
child 6876: 710a3c8b516e
permissions: -rw-r--r--

Initial load
http://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/
changeset: 6782:28b50d07f6f8
tag: jdk8u25-b17

 /*
  * Copyright (c) 1997, 2014, 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",
                   p2i(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

Mercurial > jdk8-mips64-public > hotspot / annotate

src/cpu/x86/vm/compiledIC_x86.cpp@f90c822e73f8 (annotated)

src/cpu/x86/vm/compiledIC_x86.cpp