| /* |
| * Copyright (c) 2000, 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; |
| |
| import java.io.*; |
| import java.util.*; |
| |
| import sun.jvm.hotspot.code.*; |
| import sun.jvm.hotspot.compiler.*; |
| import sun.jvm.hotspot.debugger.*; |
| import sun.jvm.hotspot.interpreter.*; |
| import sun.jvm.hotspot.oops.*; |
| import sun.jvm.hotspot.types.*; |
| import sun.jvm.hotspot.utilities.*; |
| |
| /** <P> A frame represents a physical stack frame (an activation). |
| Frames can be C or Java frames, and the Java frames can be |
| interpreted or compiled. In contrast, vframes represent |
| source-level activations, so that one physical frame can |
| correspond to multiple source level frames because of inlining. |
| </P> |
| |
| <P> NOTE that this is not a VMObject and does not wrap an Address |
| -- this is an actual port of the VM's Frame code to Java. </P> |
| |
| <P> NOTE also that this is incomplete -- just trying to get |
| reading of interpreted frames working for now, so all non-core and |
| setter methods are removed for now. (FIXME) </P> */ |
| |
| public abstract class Frame implements Cloneable { |
| /** A raw stack pointer. The accessor getSP() will return a real (usable) |
| stack pointer (e.g. from Thread::last_Java_sp) */ |
| protected Address raw_sp; |
| |
| /** Program counter (the next instruction after the call) */ |
| protected Address pc; |
| protected boolean deoptimized; |
| |
| public Frame() { |
| deoptimized = false; |
| } |
| |
| static { |
| VM.registerVMInitializedObserver(new Observer() { |
| public void update(Observable o, Object data) { |
| initialize(VM.getVM().getTypeDataBase()); |
| } |
| }); |
| } |
| |
| /** Size of ConstMethod for computing BCI from BCP (FIXME: hack) */ |
| private static long ConstMethodSize; |
| |
| private static int pcReturnOffset; |
| |
| public static int pcReturnOffset() { |
| return pcReturnOffset; |
| } |
| |
| private static synchronized void initialize(TypeDataBase db) { |
| Type ConstMethodType = db.lookupType("ConstMethod"); |
| // FIXME: not sure whether alignment here is correct or how to |
| // force it (round up to address size?) |
| ConstMethodSize = ConstMethodType.getSize(); |
| |
| pcReturnOffset = db.lookupIntConstant("frame::pc_return_offset").intValue(); |
| } |
| |
| protected int bcpToBci(Address bcp, ConstMethod cm) { |
| // bcp will be null for interpreter native methods |
| // in addition depending on where we catch the system the value can |
| // be a bcp or a bci. |
| if (bcp == null) return 0; |
| long bci = bcp.minus(null); |
| if (bci >= 0 && bci < cm.getCodeSize()) return (int) bci; |
| return (int) (bcp.minus(cm.getAddress()) - ConstMethodSize); |
| } |
| |
| protected int bcpToBci(Address bcp, Method m) { |
| return bcpToBci(bcp, m.getConstMethod()); |
| } |
| |
| public abstract Object clone(); |
| |
| // Accessors |
| |
| /** pc: Returns the pc at which this frame will continue normally. |
| It must point at the beginning of the next instruction to |
| execute. */ |
| public Address getPC() { return pc; } |
| public void setPC(Address newpc) { pc = newpc; } |
| public boolean isDeoptimized() { return deoptimized; } |
| |
| public CodeBlob cb() { |
| return VM.getVM().getCodeCache().findBlob(getPC()); |
| } |
| |
| public abstract Address getSP(); |
| public abstract Address getID(); |
| public abstract Address getFP(); |
| |
| /** testers -- platform dependent */ |
| public abstract boolean equals(Object arg); |
| |
| /** type testers */ |
| public boolean isInterpretedFrame() { return VM.getVM().getInterpreter().contains(getPC()); } |
| public boolean isJavaFrame() { |
| if (isInterpretedFrame()) return true; |
| if (!VM.getVM().isCore()) { |
| if (isCompiledFrame()) return true; |
| } |
| return false; |
| } |
| |
| /** Java frame called from C? */ |
| public boolean isEntryFrame() { return VM.getVM().getStubRoutines().returnsToCallStub(getPC()); } |
| public boolean isNativeFrame() { |
| if (!VM.getVM().isCore()) { |
| CodeBlob cb = VM.getVM().getCodeCache().findBlob(getPC()); |
| return (cb != null && cb.isNativeMethod()); |
| } else { |
| return false; |
| } |
| } |
| |
| public boolean isCompiledFrame() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(!VM.getVM().isCore(), "noncore builds only"); |
| } |
| CodeBlob cb = VM.getVM().getCodeCache().findBlob(getPC()); |
| return (cb != null && cb.isJavaMethod()); |
| } |
| |
| public boolean isRuntimeFrame() { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(!VM.getVM().isCore(), "noncore builds only"); |
| } |
| CodeBlob cb = VM.getVM().getCodeCache().findBlob(getPC()); |
| if (cb == null) { |
| return false; |
| } |
| if (cb.isRuntimeStub()) return true; |
| else return false; |
| } |
| |
| /** oldest frame? (has no sender) FIXME: this is modified from the |
| C++ code to handle the debugging situation where we try to |
| traverse the stack for, for example, the signal thread, and |
| don't find any valid Java frames. Would really like to put the |
| second half of the conditional in some sort of debugging-only if |
| statement. */ |
| // *** FIXME: THE CALL TO isJavaFrame() IS WAY TOO EXPENSIVE!!!!! *** |
| public boolean isFirstFrame() { return ((isEntryFrame() && entryFrameIsFirst()) || |
| (!isJavaFrame() && !hasSenderPD())); } |
| /** same for Java frame */ |
| public boolean isFirstJavaFrame() { throw new RuntimeException("not yet implemented"); } |
| |
| /** This is an addition for debugging purposes on platforms which |
| have the notion of signals. */ |
| public abstract boolean isSignalHandlerFrameDbg(); |
| |
| /** If this is a signal handler frame (again, on a platform with a |
| notion of signals), get the signal number. */ |
| public abstract int getSignalNumberDbg(); |
| |
| /** If this is a signal handler frame (again, on a platform with a |
| notion of signals), get the name of the signal. */ |
| public abstract String getSignalNameDbg(); |
| |
| /** performs sanity checks on interpreted frames. */ |
| public abstract boolean isInterpretedFrameValid(); |
| |
| /** tells whether this frame is marked for deoptimization */ |
| public boolean shouldBeDeoptimized() { throw new RuntimeException("not yet implemented"); } |
| |
| /** tells whether this frame can be deoptimized */ |
| public boolean canBeDeoptimized() { throw new RuntimeException("not yet implemented"); } |
| |
| /** returns the sending frame */ |
| public abstract Frame sender(RegisterMap map, CodeBlob nm); |
| |
| /** equivalent to sender(map, null) */ |
| public Frame sender(RegisterMap map) { return sender(map, null); } |
| |
| /** returns the sender, but skips conversion frames */ |
| public Frame realSender(RegisterMap map) { |
| if (!VM.getVM().isCore()) { |
| Frame result = sender(map); |
| while (result.isRuntimeFrame()) { |
| result = result.sender(map); |
| } |
| return result; |
| } else { |
| return sender(map); |
| } |
| } |
| |
| /** Platform-dependent query indicating whether this frame has a |
| sender. Should return true if it is possible to call sender() at |
| all on this frame. (This is currently only needed for the |
| debugging system, if a stack trace is attempted for a Java |
| thread which has no Java frames, i.e., the signal thread; we |
| have to know to stop traversal at the bottom frame.) */ |
| protected abstract boolean hasSenderPD(); |
| |
| //-------------------------------------------------------------------------------- |
| // All frames: |
| // A low-level interface for vframes: |
| |
| /** Returns the address of the requested "slot" on the stack. Slots |
| are as wide as addresses, so are 32 bits wide on a 32-bit |
| machine and 64 bits wide on a 64-bit machine. */ |
| public Address addressOfStackSlot(int slot) { return getFP().addOffsetTo(slot * VM.getVM().getAddressSize()); } |
| |
| /** Fetches the OopHandle at the requested slot */ |
| public OopHandle getOopHandleAt(int slot) { return addressOfStackSlot(slot).getOopHandleAt(0); } |
| /** Fetches the OopHandle at the slot, adjusted for compiler frames */ |
| // FIXME: looks like this is only used for compiled frames |
| // public OopHandle getOopHandleAtAdjusted(MethodOop method, int slot) { return addressOfStackSlot(slot).getOopHandleAt(0); } |
| // FIXME: Not yet implementable |
| // public void setOopHandleAt(int slot, OopHandle value) { addressOfStackSlot(slot).setOopHandleAt(0, value); } |
| |
| /** Fetches the (Java) int at the requested slot */ |
| public int getIntAt(int slot) { return addressOfStackSlot(slot).getJIntAt(0); } |
| // FIXME: Not yet implementable |
| // public void setIntAt(int slot, int value) { addressOfStackSlot(slot).setJIntAt(0, value); } |
| |
| /** returns the frame size in stack slots */ |
| public abstract long frameSize(); |
| |
| /** Link (i.e., the pointer to the previous frame) */ |
| public abstract Address getLink(); |
| // public abstract void setLink(Address addr); |
| |
| /** Return address */ |
| public abstract Address getSenderPC(); |
| // FIXME: currently unimplementable |
| // public abstract void setSenderPC(Address addr); |
| |
| /** The frame's original SP, before any extension by an interpreted |
| callee; used for packing debug info into vframeArray objects and |
| vframeArray lookup. */ |
| public abstract Address getUnextendedSP(); |
| |
| /** Returns the stack pointer of the calling frame */ |
| public abstract Address getSenderSP(); |
| |
| //-------------------------------------------------------------------------------- |
| // Interpreter frames: |
| // |
| |
| public abstract Address addressOfInterpreterFrameLocals(); |
| |
| public Address addressOfInterpreterFrameLocal(int slot) { |
| return addressOfInterpreterFrameLocals().getAddressAt(0).addOffsetTo(-slot * VM.getVM().getAddressSize()); |
| } |
| |
| // FIXME: not yet implementable |
| // void interpreter_frame_set_locals(intptr_t* locs); |
| |
| // NOTE that the accessor "addressOfInterpreterFrameBCX" has |
| // necessarily been eliminated. The byte code pointer is inherently |
| // an interior pointer to a Method (the bytecodes follow the |
| // Method data structure) and therefore acquisition of it in |
| // this system can not be allowed. All accesses to interpreter frame |
| // byte codes are via the byte code index (BCI). |
| |
| /** Byte code index. In the underlying frame, what is actually |
| stored is a byte code pointer (BCP), which is converted to a BCI |
| and back by the GC when methods are moved. In this system, |
| interior pointers are not allowed, so we must make the access to |
| the interpreter frame's BCI atomic with respect to GC. This may |
| mean implementation with an underlying call through native code |
| into the VM or a magic sequence in the compiler. (FIXME) */ |
| public abstract int getInterpreterFrameBCI(); |
| // FIXME: not yet implementable |
| // public abstract void setInterpreterFrameBCI(int bci); |
| |
| // FIXME: elided for now |
| // public abstract Address addressOfInterpreterCalleeReceiver(Symbol signature); |
| |
| /** Find receiver for an invoke when arguments are just pushed on |
| stack (i.e., callee stack-frame is not setup) */ |
| // FIXME: elided for now |
| // public OopHandle getInterpreterCalleeReceiver(SymbolOop signature) { return addressOfInterpreterCalleeReceiver(signature).getOopHandleAt(0); } |
| |
| //-------------------------------------------------------------------------------- |
| // Expression stack (may go up or down, direction == 1 or -1) |
| // |
| |
| public abstract Address addressOfInterpreterFrameExpressionStack(); |
| public abstract int getInterpreterFrameExpressionStackDirection(); |
| public Address addressOfInterpreterFrameExpressionStackSlot(int slot) { |
| return addressOfInterpreterFrameExpressionStack().addOffsetTo(-slot * VM.getVM().getAddressSize()); |
| } |
| |
| /** Top of expression stack */ |
| public abstract Address addressOfInterpreterFrameTOS(); |
| |
| /** Expression stack from top down */ |
| public abstract Address addressOfInterpreterFrameTOSAt(int slot); |
| |
| /** FIXME: is this portable? */ |
| public int getInterpreterFrameExpressionStackSize() { |
| return (int) (1 + (getInterpreterFrameExpressionStackDirection() * |
| (addressOfInterpreterFrameTOS().minus(addressOfInterpreterFrameExpressionStack())))); |
| } |
| |
| public abstract Address getInterpreterFrameSenderSP(); |
| // FIXME: not yet implementable |
| // public abstract void setInterpreterFrameSenderSP(Address senderSP); |
| |
| //-------------------------------------------------------------------------------- |
| // BasicObjectLocks: |
| // |
| |
| public abstract BasicObjectLock interpreterFrameMonitorBegin(); |
| public abstract BasicObjectLock interpreterFrameMonitorEnd(); |
| /** NOTE: this returns a size in BYTES in this system! */ |
| public abstract int interpreterFrameMonitorSize(); |
| public BasicObjectLock nextMonitorInInterpreterFrame(BasicObjectLock cur) { |
| return new BasicObjectLock(cur.address().addOffsetTo(interpreterFrameMonitorSize())); |
| } |
| public BasicObjectLock previousMonitorInInterpreterFrame(BasicObjectLock cur) { |
| return new BasicObjectLock(cur.address().addOffsetTo(-1 * interpreterFrameMonitorSize())); |
| } |
| |
| // interpreter_frame_monitor_begin is higher in memory than interpreter_frame_monitor_end |
| // Interpreter_frame_monitor_begin points to one element beyond the oldest one, |
| // interpreter_frame_monitor_end points to the youngest one, or if there are none, |
| // it points to one beyond where the first element will be. |
| // interpreter_frame_monitor_size reports the allocation size of a monitor in the interpreter stack. |
| // this value is >= BasicObjectLock::size(), and may be rounded up |
| |
| // FIXME: avoiding implementing this for now if possible |
| // public void interpreter_frame_set_monitor_end(BasicObjectLock* value); |
| // public void interpreter_frame_verify_monitor(BasicObjectLock* value) const; |
| //-------------------------------------------------------------------------------- |
| // Method and constant pool cache: |
| // |
| |
| /** Current method */ |
| public abstract Address addressOfInterpreterFrameMethod(); |
| |
| /** Current method */ |
| public Method getInterpreterFrameMethod() { |
| return (Method)Metadata.instantiateWrapperFor(addressOfInterpreterFrameMethod().getAddressAt(0)); |
| } |
| |
| /** Current method */ |
| // FIXME: not yet implementable |
| // public void setInterpreterFrameMethod(Method method); |
| |
| /** Constant pool cache */ |
| public abstract Address addressOfInterpreterFrameCPCache(); |
| /** Constant pool cache */ |
| public ConstantPoolCache getInterpreterFrameCPCache() { |
| return (ConstantPoolCache) Metadata.instantiateWrapperFor(addressOfInterpreterFrameCPCache().getAddressAt(0)); |
| } |
| |
| //-------------------------------------------------------------------------------- |
| // Entry frames: |
| // |
| |
| public abstract JavaCallWrapper getEntryFrameCallWrapper(); |
| |
| // FIXME: add |
| // inline intptr_t* entry_frame_argument_at(int offset) const; |
| |
| |
| /** Tells whether there is another chunk of Delta stack above */ |
| public boolean entryFrameIsFirst() { return (getEntryFrameCallWrapper().getLastJavaSP() == null); } |
| |
| //-------------------------------------------------------------------------------- |
| // Safepoints: |
| // |
| |
| protected abstract Address addressOfSavedOopResult(); |
| protected abstract Address addressOfSavedReceiver(); |
| |
| public OopHandle getSavedOopResult() { |
| return addressOfSavedOopResult().getOopHandleAt(0); |
| } |
| |
| // FIXME: not yet implementable |
| // public void setSavedOopResult(OopHandle obj); |
| |
| public OopHandle getSavedReceiver() { |
| return addressOfSavedReceiver().getOopHandleAt(0); |
| } |
| |
| // FIXME: not yet implementable |
| // public void setSavedReceiver(OopHandle obj); |
| |
| //-------------------------------------------------------------------------------- |
| // Oop traversals: |
| // |
| |
| public void oopsInterpretedArgumentsDo(Symbol signature, boolean isStatic, AddressVisitor f) { |
| ArgumentOopFinder finder = new ArgumentOopFinder(signature, isStatic, this, f); |
| finder.oopsDo(); |
| } |
| |
| /** Conversion from an VMReg::Name to physical stack location */ |
| public Address oopMapRegToLocation(VMReg reg, RegisterMap regMap) { |
| VMReg stack0 = VM.getVM().getVMRegImplInfo().getStack0(); |
| if (reg.lessThan(stack0)) { |
| // If it is passed in a register, it got spilled in the stub frame. |
| return regMap.getLocation(reg); |
| } else { |
| long spOffset = VM.getVM().getAddressSize() * reg.minus(stack0); |
| return getUnextendedSP().addOffsetTo(spOffset); |
| } |
| } |
| |
| public void oopsDo(AddressVisitor oopVisitor, RegisterMap map) { |
| if (isInterpretedFrame()) { |
| oopsInterpretedDo(oopVisitor, map); |
| } else if (isEntryFrame()) { |
| oopsEntryDo(oopVisitor, map); |
| } else if (VM.getVM().getCodeCache().contains(getPC())) { |
| oopsCodeBlobDo(oopVisitor, map); |
| } else { |
| Assert.that(false, "should not reach here"); |
| } |
| } |
| |
| //-------------------------------------------------------------------------------- |
| // Printing code |
| // |
| |
| public void printValue() { |
| printValueOn(System.out); |
| } |
| |
| public void printValueOn(PrintStream tty) { |
| // FIXME; |
| } |
| |
| public void print() { |
| printOn(System.out); |
| } |
| |
| public void printOn(PrintStream tty) { |
| // FIXME; |
| } |
| |
| public void interpreterFramePrintOn(PrintStream tty) { |
| // FIXME; |
| } |
| |
| //-------------------------------------------------------------------------------- |
| // Get/set typed locals from a frame. |
| // Respects platform dependent word-ordering. |
| // |
| // FIXME: avoiding implementing this for now if possible |
| // |
| // Currently these work only for interpreted frames. |
| // Todo: make these work for compiled frames. |
| // |
| // oop get_local_object(jint slot) const; |
| // jint get_local_int (jint slot) const; |
| // jlong get_local_long (jint slot) const; |
| // jfloat get_local_float (jint slot) const; |
| // jdouble get_local_double(jint slot) const; |
| // |
| // void set_local_object(jint slot, oop obj); |
| // void set_local_int (jint slot, jint i); |
| // void set_local_long (jint slot, jlong l); |
| // void set_local_float (jint slot, jfloat f); |
| // void set_local_double(jint slot, jdouble d); |
| |
| // FIXME: add safepoint code, oops_do, etc. |
| // FIXME: NOT FINISHED |
| |
| |
| |
| |
| |
| //-------------------------------------------------------------------------------- |
| // Internals only below this point |
| // |
| |
| // /** Helper method for better factored code in frame::sender */ |
| // private frame sender_for_entry_frame(RegisterMap* map) { throw new RuntimeException("not yet implemented"); } |
| // private frame sender_for_interpreter_frame(RegisterMap* map) { throw new RuntimeException("not yet implemented"); } |
| |
| // |
| // Oop iteration (FIXME: NOT FINISHED) |
| // |
| |
| |
| private static class InterpVisitor implements OopMapVisitor { |
| private AddressVisitor addressVisitor; |
| |
| public InterpVisitor(AddressVisitor oopVisitor) { |
| setAddressVisitor(oopVisitor); |
| } |
| |
| public void setAddressVisitor(AddressVisitor addressVisitor) { |
| this.addressVisitor = addressVisitor; |
| } |
| |
| public void visitOopLocation(Address oopAddr) { |
| addressVisitor.visitAddress(oopAddr); |
| } |
| |
| public void visitDerivedOopLocation(Address baseOopAddr, Address derivedOopAddr) { |
| if (VM.getVM().isClientCompiler()) { |
| Assert.that(false, "should not reach here"); |
| } else if (VM.getVM().isServerCompiler() && |
| VM.getVM().useDerivedPointerTable()) { |
| Assert.that(false, "FIXME: add derived pointer table"); |
| } |
| } |
| |
| public void visitNarrowOopLocation(Address compOopAddr) { |
| addressVisitor.visitCompOopAddress(compOopAddr); |
| } |
| } |
| |
| private void oopsInterpretedDo(AddressVisitor oopVisitor, RegisterMap map) { |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(map != null, "map must be set"); |
| } |
| Method m = getInterpreterFrameMethod(); |
| int bci = getInterpreterFrameBCI(); |
| |
| // FIXME: Seeing this sometimes |
| if (VM.getVM().isDebugging()) { |
| if (bci < 0 || bci >= m.getCodeSize()) return; |
| } |
| |
| if (Assert.ASSERTS_ENABLED) { |
| // Assert.that(VM.getVM().getUniverse().heap().isIn(m), "method must be valid oop"); |
| Assert.that((m.isNative() && (bci == 0)) || ((bci >= 0) && (bci < m.getCodeSize())), "invalid bci value"); |
| } |
| |
| // Handle the monitor elements in the activation |
| // FIXME: monitor information not yet exposed |
| // for ( |
| // BasicObjectLock* current = interpreter_frame_monitor_end(); |
| // current < interpreter_frame_monitor_begin(); |
| // current = next_monitor_in_interpreter_frame(current) |
| // ) { |
| //#ifdef ASSERT |
| // interpreter_frame_verify_monitor(current); |
| //#endif |
| // current->oops_do(f); |
| // } |
| |
| // process fixed part |
| // FIXME: these are no longer oops, so should anything be visitied? |
| // oopVisitor.visitAddress(addressOfInterpreterFrameMethod()); |
| // oopVisitor.visitAddress(addressOfInterpreterFrameCPCache()); |
| |
| // FIXME: expose interpreterFrameMirrorOffset |
| // if (m.isNative() && m.isStatic()) { |
| // oopVisitor.visitAddress(getFP().addOffsetTo(interpreterFrameMirrorOffset)); |
| // } |
| |
| int maxLocals = (int) (m.isNative() ? m.getSizeOfParameters() : m.getMaxLocals()); |
| InterpreterFrameClosure blk = new InterpreterFrameClosure(this, maxLocals, (int) m.getMaxStack(), oopVisitor); |
| |
| // process locals & expression stack |
| OopMapCacheEntry mask = m.getMaskFor(bci); |
| mask.iterateOop(blk); |
| |
| // process a callee's arguments if we are at a call site |
| // (i.e., if we are at an invoke bytecode) |
| if (map.getIncludeArgumentOops() && !m.isNative()) { |
| BytecodeInvoke call = BytecodeInvoke.atCheck(m, bci); |
| if (call != null && getInterpreterFrameExpressionStackSize() > 0) { |
| // we are at a call site & the expression stack is not empty |
| // => process callee's arguments |
| // |
| // Note: The expression stack can be empty if an exception |
| // occured during method resolution/execution. In all |
| // cases we empty the expression stack completely be- |
| // fore handling the exception (the exception handling |
| // code in the interpreter calls a blocking runtime |
| // routine which can cause this code to be executed). |
| // (was bug gri 7/27/98) |
| oopsInterpretedArgumentsDo(call.signature(), call.isInvokestatic(), oopVisitor); |
| } |
| } |
| } |
| |
| private void oopsEntryDo (AddressVisitor oopVisitor, RegisterMap regMap) {} |
| private void oopsCodeBlobDo (AddressVisitor oopVisitor, RegisterMap regMap) { |
| CodeBlob cb = VM.getVM().getCodeCache().findBlob(getPC()); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(cb != null, "sanity check"); |
| } |
| if (cb.getOopMaps() != null) { |
| ImmutableOopMapSet.oopsDo(this, cb, regMap, oopVisitor, VM.getVM().isDebugging()); |
| |
| // FIXME: add in traversal of argument oops (skipping this for |
| // now until we have the other stuff tested) |
| |
| } |
| |
| // FIXME: would add this in in non-debugging system |
| |
| // If we see an activation belonging to a non_entrant nmethod, we mark it. |
| // if (cb->is_nmethod() && ((nmethod *)cb)->is_not_entrant()) { |
| // ((nmethod*)cb)->mark_as_seen_on_stack(); |
| // } |
| } |
| |
| // FIXME: implement the above routines, plus add |
| // oops_interpreted_arguments_do and oops_compiled_arguments_do |
| } |
| |
| // |
| // Only used internally, to iterate through oop slots in interpreted |
| // frames |
| // |
| class InterpreterFrameClosure implements OffsetClosure { |
| // Used for debugging this code |
| private static final boolean DEBUG = false; |
| |
| private Frame fr; |
| private AddressVisitor f; |
| private int maxLocals; |
| private int maxStack; |
| |
| InterpreterFrameClosure(Frame fr, int maxLocals, int maxStack, AddressVisitor f) { |
| this.fr = fr; |
| this.maxLocals = maxLocals; |
| this.maxStack = maxStack; |
| this.f = f; |
| } |
| |
| public void offsetDo(int offset) { |
| if (DEBUG) { |
| System.err.println("Visiting offset " + offset + ", maxLocals = " + maxLocals + |
| " for frame " + fr + ", method " + |
| fr.getInterpreterFrameMethod().getMethodHolder().getName().asString() + |
| fr.getInterpreterFrameMethod().getName().asString()); |
| } |
| Address addr; |
| if (offset < maxLocals) { |
| addr = fr.addressOfInterpreterFrameLocal(offset); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(AddressOps.gte(addr, fr.getSP()), "must be inside the frame"); |
| } |
| if (DEBUG) { |
| System.err.println(" Visiting local at addr " + addr); |
| } |
| f.visitAddress(addr); |
| } else { |
| addr = fr.addressOfInterpreterFrameExpressionStackSlot(offset - maxLocals); |
| if (DEBUG) { |
| System.err.println(" Address of expression stack slot: " + addr + ", TOS = " + |
| fr.addressOfInterpreterFrameTOS()); |
| } |
| // In case of exceptions, the expression stack is invalid and the esp will be reset to express |
| // this condition. Therefore, we call f only if addr is 'inside' the stack (i.e., addr >= esp for Intel). |
| boolean inStack; |
| if (fr.getInterpreterFrameExpressionStackDirection() > 0) { |
| inStack = AddressOps.lte(addr, fr.addressOfInterpreterFrameTOS()); |
| } else { |
| inStack = AddressOps.gte(addr, fr.addressOfInterpreterFrameTOS()); |
| } |
| if (inStack) { |
| if (DEBUG) { |
| System.err.println(" In stack; visiting location."); |
| } |
| f.visitAddress(addr); |
| } else if (DEBUG) { |
| System.err.println(" *** WARNING: Address is out of bounds"); |
| } |
| } |
| } |
| } |
| |
| // Only used internally, to find arguments in interpreted frames |
| class ArgumentOopFinder extends SignatureInfo { |
| private AddressVisitor f; |
| private int offset; |
| private boolean isStatic; |
| private Frame fr; |
| |
| protected void set(int size, int type) { |
| offset -= size; |
| if (type == BasicType.getTObject() || type == BasicType.getTArray()) oopOffsetDo(); |
| } |
| |
| private void oopOffsetDo() { |
| f.visitAddress(fr.addressOfInterpreterFrameTOSAt(offset)); |
| } |
| |
| public ArgumentOopFinder(Symbol signature, boolean isStatic, Frame fr, AddressVisitor f) { |
| super(signature); |
| |
| // compute size of arguments |
| int argsSize = new ArgumentSizeComputer(signature).size() + (isStatic ? 0 : 1); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(!fr.isInterpretedFrame() || |
| argsSize <= fr.getInterpreterFrameExpressionStackSize(), "args cannot be on stack anymore"); |
| } |
| // initialize ArgumentOopFinder |
| this.f = f; |
| this.fr = fr; |
| this.offset = argsSize; |
| this.isStatic = isStatic; |
| } |
| |
| public void oopsDo() { |
| if (!isStatic) { |
| --offset; |
| oopOffsetDo(); |
| } |
| iterateParameters(); |
| } |
| } |