Mercurial > hg > truffle
annotate agent/src/share/classes/sun/jvm/hotspot/runtime/StubRoutines.java @ 674:4948e7dd28dc
6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
Reviewed-by: kvn, twisti
| author | never |
|---|---|
| date | Fri, 27 Mar 2009 14:37:42 -0700 |
| parents | a61af66fc99e |
| children | bd02caa94611 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 * Copyright 2000-2005 Sun Microsystems, Inc. All Rights Reserved. | |
| 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 package sun.jvm.hotspot.runtime; | |
| 26 | |
| 27 import java.util.*; | |
| 28 import sun.jvm.hotspot.debugger.*; | |
| 29 import sun.jvm.hotspot.types.*; | |
| 30 | |
| 31 /** Very minimal port for now to get frames working */ | |
| 32 | |
| 33 public class StubRoutines { | |
| 34 private static AddressField callStubReturnAddressField; | |
| 35 private static AddressField callStubCompiledReturnAddressField; | |
| 36 | |
| 37 static { | |
| 38 VM.registerVMInitializedObserver(new Observer() { | |
| 39 public void update(Observable o, Object data) { | |
| 40 initialize(VM.getVM().getTypeDataBase()); | |
| 41 } | |
| 42 }); | |
| 43 } | |
| 44 | |
| 45 private static synchronized void initialize(TypeDataBase db) { | |
| 46 Type type = db.lookupType("StubRoutines"); | |
| 47 | |
| 48 callStubReturnAddressField = type.getAddressField("_call_stub_return_address"); | |
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6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
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49 // Only some platforms have specific return from compiled to call_stub |
| 0 | 50 try { |
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6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
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51 type = db.lookupType("StubRoutines::x86"); |
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52 if (type != null) { |
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6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
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53 callStubCompiledReturnAddressField = type.getAddressField("_call_stub_compiled_return"); |
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6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
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54 } |
| 0 | 55 } catch (RuntimeException re) { |
| 56 callStubCompiledReturnAddressField = null; | |
| 57 } | |
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6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
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parents:
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58 if (callStubCompiledReturnAddressField == null && VM.getVM().getCPU().equals("x86")) { |
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4948e7dd28dc
6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
never
parents:
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diff
changeset
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59 throw new InternalError("Missing definition for _call_stub_compiled_return"); |
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4948e7dd28dc
6822333: _call_stub_compiled_return address handling in SA is broken causing jstack to hang occasionally
never
parents:
0
diff
changeset
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60 } |
| 0 | 61 } |
| 62 | |
| 63 public StubRoutines() { | |
| 64 } | |
| 65 | |
| 66 public boolean returnsToCallStub(Address returnPC) { | |
| 67 Address addr = callStubReturnAddressField.getValue(); | |
| 68 boolean result = false; | |
| 69 if (addr == null) { | |
| 70 result = (addr == returnPC); | |
| 71 } else { | |
| 72 result = addr.equals(returnPC); | |
| 73 } | |
| 74 if (result || callStubCompiledReturnAddressField == null ) return result; | |
| 75 // Could be a return to compiled code return point | |
| 76 addr = callStubCompiledReturnAddressField.getValue(); | |
| 77 if (addr == null) { | |
| 78 return (addr == returnPC); | |
| 79 } else { | |
| 80 return (addr.equals(returnPC)); | |
| 81 } | |
| 82 | |
| 83 } | |
| 84 } |