| /* |
| * Copyright (c) 2001, 2015, 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. |
| * |
| */ |
| |
| package sun.jvm.hotspot.runtime.x86; |
| |
| import java.util.*; |
| import sun.jvm.hotspot.code.*; |
| import sun.jvm.hotspot.compiler.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.runtime.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| /** Specialization of and implementation of abstract methods of the |
| Frame class for the x86 family of CPUs. */ |
| |
| public class X86Frame extends Frame { |
| private static final boolean DEBUG; |
| static { |
| DEBUG = System.getProperty("sun.jvm.hotspot.runtime.x86.X86Frame.DEBUG") != null; |
| } |
| |
| // All frames |
| private static final int LINK_OFFSET = 0; |
| private static final int RETURN_ADDR_OFFSET = 1; |
| private static final int SENDER_SP_OFFSET = 2; |
| |
| // Interpreter frames |
| private static final int INTERPRETER_FRAME_SENDER_SP_OFFSET = -1; |
| private static final int INTERPRETER_FRAME_LAST_SP_OFFSET = INTERPRETER_FRAME_SENDER_SP_OFFSET - 1; |
| private static final int INTERPRETER_FRAME_METHOD_OFFSET = INTERPRETER_FRAME_LAST_SP_OFFSET - 1; |
| private static int INTERPRETER_FRAME_MIRROR_OFFSET; |
| private static int INTERPRETER_FRAME_MDX_OFFSET; // Non-core builds only |
| private static int INTERPRETER_FRAME_CACHE_OFFSET; |
| private static int INTERPRETER_FRAME_LOCALS_OFFSET; |
| private static int INTERPRETER_FRAME_BCX_OFFSET; |
| private static int INTERPRETER_FRAME_INITIAL_SP_OFFSET; |
| private static int INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET; |
| private static int INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET; |
| |
| // Entry frames |
| private static int ENTRY_FRAME_CALL_WRAPPER_OFFSET; |
| |
| private static VMReg rbp; |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| INTERPRETER_FRAME_MIRROR_OFFSET = INTERPRETER_FRAME_METHOD_OFFSET - 1; |
| INTERPRETER_FRAME_MDX_OFFSET = INTERPRETER_FRAME_MIRROR_OFFSET - 1; |
| INTERPRETER_FRAME_CACHE_OFFSET = INTERPRETER_FRAME_MDX_OFFSET - 1; |
| INTERPRETER_FRAME_LOCALS_OFFSET = INTERPRETER_FRAME_CACHE_OFFSET - 1; |
| INTERPRETER_FRAME_BCX_OFFSET = INTERPRETER_FRAME_LOCALS_OFFSET - 1; |
| INTERPRETER_FRAME_INITIAL_SP_OFFSET = INTERPRETER_FRAME_BCX_OFFSET - 1; |
| INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET = INTERPRETER_FRAME_INITIAL_SP_OFFSET; |
| INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET = INTERPRETER_FRAME_INITIAL_SP_OFFSET; |
| |
| ENTRY_FRAME_CALL_WRAPPER_OFFSET = db.lookupIntConstant("frame::entry_frame_call_wrapper_offset"); |
| if (VM.getVM().getAddressSize() == 4) { |
| rbp = new VMReg(5); |
| } else { |
| rbp = new VMReg(5 << 1); |
| } |
| } |
| |
| |
| // an additional field beyond sp and pc: |
| Address raw_fp; // frame pointer |
| private Address raw_unextendedSP; |
| |
| private X86Frame() { |
| } |
| |
| private void adjustForDeopt() { |
| if ( pc != null) { |
| // Look for a deopt pc and if it is deopted convert to original pc |
| CodeBlob cb = VM.getVM().getCodeCache().findBlob(pc); |
| if (cb != null && cb.isJavaMethod()) { |
| NMethod nm = (NMethod) cb; |
| if (pc.equals(nm.deoptHandlerBegin())) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(this.getUnextendedSP() != null, "null SP in Java frame"); |
| } |
| // adjust pc if frame is deoptimized. |
| pc = this.getUnextendedSP().getAddressAt(nm.origPCOffset()); |
| deoptimized = true; |
| } |
| } |
| } |
| } |
| |
| public X86Frame(Address raw_sp, Address raw_fp, Address pc) { |
| this.raw_sp = raw_sp; |
| this.raw_unextendedSP = raw_sp; |
| this.raw_fp = raw_fp; |
| this.pc = pc; |
| adjustUnextendedSP(); |
| |
| // Frame must be fully constructed before this call |
| adjustForDeopt(); |
| |
| if (DEBUG) { |
| System.out.println("X86Frame(sp, fp, pc): " + this); |
| dumpStack(); |
| } |
| } |
| |
| public X86Frame(Address raw_sp, Address raw_fp) { |
| this.raw_sp = raw_sp; |
| this.raw_unextendedSP = raw_sp; |
| this.raw_fp = raw_fp; |
| this.pc = raw_sp.getAddressAt(-1 * VM.getVM().getAddressSize()); |
| adjustUnextendedSP(); |
| |
| // Frame must be fully constructed before this call |
| adjustForDeopt(); |
| |
| if (DEBUG) { |
| System.out.println("X86Frame(sp, fp): " + this); |
| dumpStack(); |
| } |
| } |
| |
| public X86Frame(Address raw_sp, Address raw_unextendedSp, Address raw_fp, Address pc) { |
| this.raw_sp = raw_sp; |
| this.raw_unextendedSP = raw_unextendedSp; |
| this.raw_fp = raw_fp; |
| this.pc = pc; |
| adjustUnextendedSP(); |
| |
| // Frame must be fully constructed before this call |
| adjustForDeopt(); |
| |
| if (DEBUG) { |
| System.out.println("X86Frame(sp, unextendedSP, fp, pc): " + this); |
| dumpStack(); |
| } |
| |
| } |
| |
| public Object clone() { |
| X86Frame frame = new X86Frame(); |
| frame.raw_sp = raw_sp; |
| frame.raw_unextendedSP = raw_unextendedSP; |
| frame.raw_fp = raw_fp; |
| frame.pc = pc; |
| frame.deoptimized = deoptimized; |
| return frame; |
| } |
| |
| public boolean equals(Object arg) { |
| if (arg == null) { |
| return false; |
| } |
| |
| if (!(arg instanceof X86Frame)) { |
| return false; |
| } |
| |
| X86Frame other = (X86Frame) arg; |
| |
| return (AddressOps.equal(getSP(), other.getSP()) && |
| AddressOps.equal(getUnextendedSP(), other.getUnextendedSP()) && |
| AddressOps.equal(getFP(), other.getFP()) && |
| AddressOps.equal(getPC(), other.getPC())); |
| } |
| |
| public int hashCode() { |
| if (raw_sp == null) { |
| return 0; |
| } |
| |
| return raw_sp.hashCode(); |
| } |
| |
| public String toString() { |
| return "sp: " + (getSP() == null? "null" : getSP().toString()) + |
| ", unextendedSP: " + (getUnextendedSP() == null? "null" : getUnextendedSP().toString()) + |
| ", fp: " + (getFP() == null? "null" : getFP().toString()) + |
| ", pc: " + (pc == null? "null" : pc.toString()); |
| } |
| |
| // accessors for the instance variables |
| public Address getFP() { return raw_fp; } |
| public Address getSP() { return raw_sp; } |
| public Address getID() { return raw_sp; } |
| |
| // FIXME: not implemented yet (should be done for Solaris/X86) |
| public boolean isSignalHandlerFrameDbg() { return false; } |
| public int getSignalNumberDbg() { return 0; } |
| public String getSignalNameDbg() { return null; } |
| |
| public boolean isInterpretedFrameValid() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isInterpretedFrame(), "Not an interpreted frame"); |
| } |
| |
| // These are reasonable sanity checks |
| if (getFP() == null || getFP().andWithMask(0x3) != null) { |
| return false; |
| } |
| |
| if (getSP() == null || getSP().andWithMask(0x3) != null) { |
| return false; |
| } |
| |
| if (getFP().addOffsetTo(INTERPRETER_FRAME_INITIAL_SP_OFFSET * VM.getVM().getAddressSize()).lessThan(getSP())) { |
| return false; |
| } |
| |
| // These are hacks to keep us out of trouble. |
| // The problem with these is that they mask other problems |
| if (getFP().lessThanOrEqual(getSP())) { |
| // this attempts to deal with unsigned comparison above |
| return false; |
| } |
| |
| if (getFP().minus(getSP()) > 4096 * VM.getVM().getAddressSize()) { |
| // stack frames shouldn't be large. |
| return false; |
| } |
| |
| return true; |
| } |
| |
| // FIXME: not applicable in current system |
| // void patch_pc(Thread* thread, address pc); |
| |
| public Frame sender(RegisterMap regMap, CodeBlob cb) { |
| X86RegisterMap map = (X86RegisterMap) regMap; |
| |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(map != null, "map must be set"); |
| } |
| |
| // Default is we done have to follow them. The sender_for_xxx will |
| // update it accordingly |
| map.setIncludeArgumentOops(false); |
| |
| if (isEntryFrame()) return senderForEntryFrame(map); |
| if (isInterpretedFrame()) return senderForInterpreterFrame(map); |
| |
| if(cb == null) { |
| cb = VM.getVM().getCodeCache().findBlob(getPC()); |
| } else { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(cb.equals(VM.getVM().getCodeCache().findBlob(getPC())), "Must be the same"); |
| } |
| } |
| |
| if (cb != null) { |
| return senderForCompiledFrame(map, cb); |
| } |
| |
| // Must be native-compiled frame, i.e. the marshaling code for native |
| // methods that exists in the core system. |
| return new X86Frame(getSenderSP(), getLink(), getSenderPC()); |
| } |
| |
| private Frame senderForEntryFrame(X86RegisterMap map) { |
| if (DEBUG) { |
| System.out.println("senderForEntryFrame"); |
| } |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(map != null, "map must be set"); |
| } |
| // Java frame called from C; skip all C frames and return top C |
| // frame of that chunk as the sender |
| X86JavaCallWrapper jcw = (X86JavaCallWrapper) getEntryFrameCallWrapper(); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(!entryFrameIsFirst(), "next Java fp must be non zero"); |
| Assert.that(jcw.getLastJavaSP().greaterThan(getSP()), "must be above this frame on stack"); |
| } |
| X86Frame fr; |
| if (jcw.getLastJavaPC() != null) { |
| fr = new X86Frame(jcw.getLastJavaSP(), jcw.getLastJavaFP(), jcw.getLastJavaPC()); |
| } else { |
| fr = new X86Frame(jcw.getLastJavaSP(), jcw.getLastJavaFP()); |
| } |
| map.clear(); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(map.getIncludeArgumentOops(), "should be set by clear"); |
| } |
| return fr; |
| } |
| |
| //------------------------------------------------------------------------------ |
| // frame::adjust_unextended_sp |
| private void adjustUnextendedSP() { |
| // On x86, sites calling method handle intrinsics and lambda forms are treated |
| // as any other call site. Therefore, no special action is needed when we are |
| // returning to any of these call sites. |
| |
| CodeBlob cb = cb(); |
| NMethod senderNm = (cb == null) ? null : cb.asNMethodOrNull(); |
| if (senderNm != null) { |
| // If the sender PC is a deoptimization point, get the original PC. |
| if (senderNm.isDeoptEntry(getPC()) || |
| senderNm.isDeoptMhEntry(getPC())) { |
| // DEBUG_ONLY(verifyDeoptriginalPc(senderNm, raw_unextendedSp)); |
| } |
| } |
| } |
| |
| private Frame senderForInterpreterFrame(X86RegisterMap map) { |
| if (DEBUG) { |
| System.out.println("senderForInterpreterFrame"); |
| } |
| Address unextendedSP = addressOfStackSlot(INTERPRETER_FRAME_SENDER_SP_OFFSET).getAddressAt(0); |
| Address sp = addressOfStackSlot(SENDER_SP_OFFSET); |
| // We do not need to update the callee-save register mapping because above |
| // us is either another interpreter frame or a converter-frame, but never |
| // directly a compiled frame. |
| // 11/24/04 SFG. With the removal of adapter frames this is no longer true. |
| // However c2 no longer uses callee save register for java calls so there |
| // are no callee register to find. |
| |
| if (map.getUpdateMap()) |
| updateMapWithSavedLink(map, addressOfStackSlot(LINK_OFFSET)); |
| |
| return new X86Frame(sp, unextendedSP, getLink(), getSenderPC()); |
| } |
| |
| private void updateMapWithSavedLink(RegisterMap map, Address savedFPAddr) { |
| map.setLocation(rbp, savedFPAddr); |
| } |
| |
| private Frame senderForCompiledFrame(X86RegisterMap map, CodeBlob cb) { |
| if (DEBUG) { |
| System.out.println("senderForCompiledFrame"); |
| } |
| |
| // |
| // NOTE: some of this code is (unfortunately) duplicated in X86CurrentFrameGuess |
| // |
| |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(map != null, "map must be set"); |
| } |
| |
| // frame owned by optimizing compiler |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(cb.getFrameSize() >= 0, "must have non-zero frame size"); |
| } |
| Address senderSP = getUnextendedSP().addOffsetTo(cb.getFrameSize()); |
| |
| // On Intel the return_address is always the word on the stack |
| Address senderPC = senderSP.getAddressAt(-1 * VM.getVM().getAddressSize()); |
| |
| // This is the saved value of EBP which may or may not really be an FP. |
| // It is only an FP if the sender is an interpreter frame (or C1?). |
| Address savedFPAddr = senderSP.addOffsetTo(- SENDER_SP_OFFSET * VM.getVM().getAddressSize()); |
| |
| if (map.getUpdateMap()) { |
| // Tell GC to use argument oopmaps for some runtime stubs that need it. |
| // For C1, the runtime stub might not have oop maps, so set this flag |
| // outside of update_register_map. |
| map.setIncludeArgumentOops(cb.callerMustGCArguments()); |
| |
| if (cb.getOopMaps() != null) { |
| ImmutableOopMapSet.updateRegisterMap(this, cb, map, true); |
| } |
| |
| // Since the prolog does the save and restore of EBP there is no oopmap |
| // for it so we must fill in its location as if there was an oopmap entry |
| // since if our caller was compiled code there could be live jvm state in it. |
| updateMapWithSavedLink(map, savedFPAddr); |
| } |
| |
| return new X86Frame(senderSP, savedFPAddr.getAddressAt(0), senderPC); |
| } |
| |
| protected boolean hasSenderPD() { |
| // FIXME |
| // Check for null ebp? Need to do some tests. |
| return true; |
| } |
| |
| public long frameSize() { |
| return (getSenderSP().minus(getSP()) / VM.getVM().getAddressSize()); |
| } |
| |
| public Address getLink() { |
| return addressOfStackSlot(LINK_OFFSET).getAddressAt(0); |
| } |
| |
| public Address getUnextendedSP() { return raw_unextendedSP; } |
| |
| // Return address: |
| public Address getSenderPCAddr() { return addressOfStackSlot(RETURN_ADDR_OFFSET); } |
| public Address getSenderPC() { return getSenderPCAddr().getAddressAt(0); } |
| |
| public Address getSenderSP() { return addressOfStackSlot(SENDER_SP_OFFSET); } |
| |
| public Address addressOfInterpreterFrameLocals() { |
| return addressOfStackSlot(INTERPRETER_FRAME_LOCALS_OFFSET); |
| } |
| |
| private Address addressOfInterpreterFrameBCX() { |
| return addressOfStackSlot(INTERPRETER_FRAME_BCX_OFFSET); |
| } |
| |
| public int getInterpreterFrameBCI() { |
| // FIXME: this is not atomic with respect to GC and is unsuitable |
| // for use in a non-debugging, or reflective, system. Need to |
| // figure out how to express this. |
| Address bcp = addressOfInterpreterFrameBCX().getAddressAt(0); |
| Address methodHandle = addressOfInterpreterFrameMethod().getAddressAt(0); |
| Method method = (Method)Metadata.instantiateWrapperFor(methodHandle); |
| return bcpToBci(bcp, method); |
| } |
| |
| public Address addressOfInterpreterFrameMDX() { |
| return addressOfStackSlot(INTERPRETER_FRAME_MDX_OFFSET); |
| } |
| |
| // FIXME |
| //inline int frame::interpreter_frame_monitor_size() { |
| // return BasicObjectLock::size(); |
| //} |
| |
| // expression stack |
| // (the max_stack arguments are used by the GC; see class FrameClosure) |
| |
| public Address addressOfInterpreterFrameExpressionStack() { |
| Address monitorEnd = interpreterFrameMonitorEnd().address(); |
| return monitorEnd.addOffsetTo(-1 * VM.getVM().getAddressSize()); |
| } |
| |
| public int getInterpreterFrameExpressionStackDirection() { return -1; } |
| |
| // top of expression stack |
| public Address addressOfInterpreterFrameTOS() { |
| return getSP(); |
| } |
| |
| /** Expression stack from top down */ |
| public Address addressOfInterpreterFrameTOSAt(int slot) { |
| return addressOfInterpreterFrameTOS().addOffsetTo(slot * VM.getVM().getAddressSize()); |
| } |
| |
| public Address getInterpreterFrameSenderSP() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(isInterpretedFrame(), "interpreted frame expected"); |
| } |
| return addressOfStackSlot(INTERPRETER_FRAME_SENDER_SP_OFFSET).getAddressAt(0); |
| } |
| |
| // Monitors |
| public BasicObjectLock interpreterFrameMonitorBegin() { |
| return new BasicObjectLock(addressOfStackSlot(INTERPRETER_FRAME_MONITOR_BLOCK_BOTTOM_OFFSET)); |
| } |
| |
| public BasicObjectLock interpreterFrameMonitorEnd() { |
| Address result = addressOfStackSlot(INTERPRETER_FRAME_MONITOR_BLOCK_TOP_OFFSET).getAddressAt(0); |
| if (Assert.ASSERTS_ENABLED) { |
| // make sure the pointer points inside the frame |
| Assert.that(AddressOps.gt(getFP(), result), "result must < than frame pointer"); |
| Assert.that(AddressOps.lte(getSP(), result), "result must >= than stack pointer"); |
| } |
| return new BasicObjectLock(result); |
| } |
| |
| public int interpreterFrameMonitorSize() { |
| return BasicObjectLock.size(); |
| } |
| |
| // Method |
| public Address addressOfInterpreterFrameMethod() { |
| return addressOfStackSlot(INTERPRETER_FRAME_METHOD_OFFSET); |
| } |
| |
| // Constant pool cache |
| public Address addressOfInterpreterFrameCPCache() { |
| return addressOfStackSlot(INTERPRETER_FRAME_CACHE_OFFSET); |
| } |
| |
| // Entry frames |
| public JavaCallWrapper getEntryFrameCallWrapper() { |
| return new X86JavaCallWrapper(addressOfStackSlot(ENTRY_FRAME_CALL_WRAPPER_OFFSET).getAddressAt(0)); |
| } |
| |
| protected Address addressOfSavedOopResult() { |
| // offset is 2 for compiler2 and 3 for compiler1 |
| return getSP().addOffsetTo((VM.getVM().isClientCompiler() ? 2 : 3) * |
| VM.getVM().getAddressSize()); |
| } |
| |
| protected Address addressOfSavedReceiver() { |
| return getSP().addOffsetTo(-4 * VM.getVM().getAddressSize()); |
| } |
| |
| private void dumpStack() { |
| if (getFP() != null) { |
| for (Address addr = getSP().addOffsetTo(-5 * VM.getVM().getAddressSize()); |
| AddressOps.lte(addr, getFP().addOffsetTo(5 * VM.getVM().getAddressSize())); |
| addr = addr.addOffsetTo(VM.getVM().getAddressSize())) { |
| System.out.println(addr + ": " + addr.getAddressAt(0)); |
| } |
| } else { |
| for (Address addr = getSP().addOffsetTo(-5 * VM.getVM().getAddressSize()); |
| AddressOps.lte(addr, getSP().addOffsetTo(20 * VM.getVM().getAddressSize())); |
| addr = addr.addOffsetTo(VM.getVM().getAddressSize())) { |
| System.out.println(addr + ": " + addr.getAddressAt(0)); |
| } |
| } |
| } |
| } |