| /* |
| * Copyright (c) 2000, 2017, 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.oops.*; |
| import sun.jvm.hotspot.utilities.*; |
| import sun.jvm.hotspot.debugger.*; |
| |
| public abstract class JavaVFrame extends VFrame { |
| |
| private static final String ADDRESS_FORMAT = VM.getVM().isLP64() ? "0x%016x" |
| : "0x%08x"; |
| |
| /** JVM state */ |
| public abstract Method getMethod(); |
| public abstract int getBCI(); |
| public abstract StackValueCollection getLocals(); |
| public abstract StackValueCollection getExpressions(); |
| public abstract List<MonitorInfo> getMonitors(); |
| |
| /** Test operation */ |
| public boolean isJavaFrame() { return true; } |
| |
| /** Package-internal constructor */ |
| JavaVFrame(Frame fr, RegisterMap regMap, JavaThread thread) { |
| super(fr, regMap, thread); |
| } |
| |
| /** Get monitor (if any) that this JavaVFrame is trying to enter */ |
| // FIXME: not yet implemented |
| // public Address getPendingMonitor(int frameCount); |
| |
| public void printLockedObjectClassName(PrintStream tty, |
| OopHandle hobj, String lockState) { |
| if (hobj.asLongValue() != 0L) { |
| tty.format("\t- %s <" + ADDRESS_FORMAT + "> ", |
| lockState, hobj.asLongValue()); |
| |
| Klass klass = Oop.getKlassForOopHandle(hobj); |
| String klassName = klass.getName().asString(); |
| tty.print("(a "); |
| if (klassName.equals("java/lang/Class")) { |
| Oop obj = VM.getVM().getObjectHeap().newOop(hobj); |
| klassName = java_lang_Class.asExternalName(obj); |
| tty.print("java.lang.Class for "); |
| } |
| tty.println(klassName.replace('/', '.') + ")"); |
| } |
| } |
| |
| private String identifyLockState(MonitorInfo monitor, String waitingState) { |
| Mark mark = new Mark(monitor.owner()); |
| if (mark.hasMonitor() && |
| ( // we have marked ourself as pending on this monitor |
| mark.monitor().equals(thread.getCurrentPendingMonitor()) || |
| // we are not the owner of this monitor |
| !mark.monitor().isEntered(thread) |
| )) { |
| return waitingState; |
| } |
| return "locked"; |
| } |
| |
| /** Printing used during stack dumps */ |
| public void printLockInfo(PrintStream tty, int frameCount) { |
| // If this is the first frame and it is java.lang.Object.wait(...) |
| // then print out the receiver. Locals are not always available, |
| // e.g., compiled native frames have no scope so there are no locals. |
| if (frameCount == 0) { |
| if (getMethod().getName().asString().equals("wait") && |
| getMethod().getMethodHolder().getName().asString().equals("java/lang/Object")) { |
| String waitState = "waiting on"; // assume we are waiting |
| // If earlier in the output we reported java.lang.Thread.State == |
| // "WAITING (on object monitor)" and now we report "waiting on", then |
| // we are still waiting for notification or timeout. Otherwise if |
| // we earlier reported java.lang.Thread.State == "BLOCKED (on object |
| // monitor)", then we are actually waiting to re-lock the monitor. |
| // At this level we can't distinguish the two cases to report |
| // "waited on" rather than "waiting on" for the second case. |
| StackValueCollection locs = getLocals(); |
| if (!locs.isEmpty()) { |
| StackValue sv = locs.get(0); |
| if (sv.getType() == BasicType.getTObject()) { |
| OopHandle o = sv.getObject(); |
| printLockedObjectClassName(tty, o, waitState); |
| } |
| } else { |
| tty.println("\t- " + waitState + " <no object reference available>"); |
| } |
| } else if (thread.getCurrentParkBlocker() != null) { |
| Oop obj = thread.getCurrentParkBlocker(); |
| Klass k = obj.getKlass(); |
| tty.format("\t- parking to wait for <" + ADDRESS_FORMAT + "> (a %s)", |
| obj.getHandle().asLongValue(), k.getName().asString()); |
| tty.println(); |
| } |
| } |
| |
| // Print out all monitors that we have locked, or are trying to lock, |
| // including re-locking after being notified or timing out in a wait(). |
| List<MonitorInfo> mons = getMonitors(); |
| if (!mons.isEmpty()) { |
| boolean foundFirstMonitor = false; |
| for (int index = mons.size() - 1; index >= 0; index--) { |
| MonitorInfo monitor = mons.get(index); |
| if (monitor.eliminated() && isCompiledFrame()) { // Eliminated in compiled code |
| if (monitor.ownerIsScalarReplaced()) { |
| Klass k = Oop.getKlassForOopHandle(monitor.ownerKlass()); |
| tty.println("\t- eliminated <owner is scalar replaced> (a " + k.getName().asString() + ")"); |
| } else if (monitor.owner() != null) { |
| printLockedObjectClassName(tty, monitor.owner(), "eliminated"); |
| } |
| continue; |
| } |
| if (monitor.owner() != null) { |
| // the monitor is associated with an object, i.e., it is locked |
| String lockState = "locked"; |
| if (!foundFirstMonitor && frameCount == 0) { |
| // If this is the first frame and we haven't found an owned |
| // monitor before, then we need to see if we have completed |
| // the lock or if we are blocked trying to acquire it. Only |
| // an inflated monitor that is first on the monitor list in |
| // the first frame can block us on a monitor enter. |
| lockState = identifyLockState(monitor, "waiting to lock"); |
| } else if (frameCount != 0) { |
| // This is not the first frame so we either own this monitor |
| // or we owned the monitor before and called wait(). Because |
| // wait() could have been called on any monitor in a lower |
| // numbered frame on the stack, we have to check all the |
| // monitors on the list for this frame. |
| lockState = identifyLockState(monitor, "waiting to re-lock in wait()"); |
| } |
| printLockedObjectClassName(tty, monitor.owner(), lockState); |
| foundFirstMonitor = true; |
| } |
| } |
| } |
| } |
| |
| /** Printing operations */ |
| |
| // |
| // FIXME: implement visitor pattern for traversing vframe contents? |
| // |
| |
| public void print() { |
| printOn(System.out); |
| } |
| |
| public void printOn(PrintStream tty) { |
| super.printOn(tty); |
| |
| tty.print("\t"); |
| getMethod().printValueOn(tty); |
| tty.println(); |
| tty.println("\tbci:\t" + getBCI()); |
| |
| printStackValuesOn(tty, "locals", getLocals()); |
| printStackValuesOn(tty, "expressions", getExpressions()); |
| } |
| |
| public void printActivation(int index) { |
| printActivationOn(System.out, index); |
| } |
| |
| public void printActivationOn(PrintStream tty, int index) { |
| // frame number and method |
| tty.print(index + " - "); |
| printValueOn(tty); |
| tty.println(); |
| |
| if (VM.getVM().wizardMode()) { |
| printOn(tty); |
| tty.println(); |
| } |
| } |
| |
| /** Verification operations */ |
| public void verify() { |
| } |
| |
| public boolean equals(Object o) { |
| if (o == null || !(o instanceof JavaVFrame)) { |
| return false; |
| } |
| |
| JavaVFrame other = (JavaVFrame) o; |
| |
| // Check static part |
| if (!getMethod().equals(other.getMethod())) { |
| return false; |
| } |
| |
| if (getBCI() != other.getBCI()) { |
| return false; |
| } |
| |
| // dynamic part - we just compare the frame pointer |
| if (! getFrame().equals(other.getFrame())) { |
| return false; |
| } |
| return true; |
| } |
| |
| public int hashCode() { |
| return getMethod().hashCode() ^ getBCI() ^ getFrame().hashCode(); |
| } |
| |
| /** Structural compare */ |
| public boolean structuralCompare(JavaVFrame other) { |
| // Check static part |
| if (!getMethod().equals(other.getMethod())) { |
| return false; |
| } |
| |
| if (getBCI() != other.getBCI()) { |
| return false; |
| } |
| |
| // Check locals |
| StackValueCollection locs = getLocals(); |
| StackValueCollection otherLocs = other.getLocals(); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(locs.size() == otherLocs.size(), "sanity check"); |
| } |
| for (int i = 0; i < locs.size(); i++) { |
| // it might happen the compiler reports a conflict and |
| // the interpreter reports a bogus int. |
| if ( isCompiledFrame() && (locs.get(i)).getType() == BasicType.getTConflict()) continue; |
| if (other.isCompiledFrame() && (otherLocs.get(i)).getType() == BasicType.getTConflict()) continue; |
| |
| if (!locs.get(i).equals(otherLocs.get(i))) { |
| return false; |
| } |
| } |
| |
| // Check expressions |
| StackValueCollection exprs = getExpressions(); |
| StackValueCollection otherExprs = other.getExpressions(); |
| if (Assert.ASSERTS_ENABLED) { |
| Assert.that(exprs.size() == otherExprs.size(), "sanity check"); |
| } |
| for (int i = 0; i < exprs.size(); i++) { |
| if (!exprs.get(i).equals(otherExprs.get(i))) { |
| return false; |
| } |
| } |
| |
| return true; |
| } |
| |
| //-------------------------------------------------------------------------------- |
| // Internals only below this point |
| // |
| |
| private void printStackValuesOn(PrintStream tty, String title, StackValueCollection values) { |
| if (values.isEmpty()) { |
| return; |
| } |
| tty.println("\t" + title + ":"); |
| for (int index = 0; index < values.size(); index++) { |
| tty.print("\t" + index + "\t"); |
| values.get(index).printOn(tty); |
| tty.println(); |
| } |
| } |
| } |
