agent/src/share/classes/sun/jvm/hotspot/runtime/sparc/SPARCFrame.java
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agent/src/share/classes/sun/jvm/hotspot/runtime/sparc/SPARCFrame.java

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   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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.runtime.sparc;
  26 
  27 import java.util.*;
  28 
  29 import sun.jvm.hotspot.asm.sparc.*;
  30 import sun.jvm.hotspot.code.*;
  31 import sun.jvm.hotspot.compiler.*;
  32 import sun.jvm.hotspot.debugger.*;
  33 import sun.jvm.hotspot.debugger.cdbg.*;
  34 import sun.jvm.hotspot.oops.*;
  35 import sun.jvm.hotspot.runtime.*;
  36 import sun.jvm.hotspot.runtime.posix.*;
  37 import sun.jvm.hotspot.types.*;
  38 import sun.jvm.hotspot.utilities.*;
  39 
  40 /** Specialization of and implementation of abstract methods of the
  41     Frame class for the SPARC CPU. (FIXME: this is as quick a port as
  42     possible to get things running; will have to do a better job right
  43     away.) */
  44 
  45 public class SPARCFrame extends Frame {
  46   // The pc value is the raw return address, plus 8 (pcReturnOffset()).
  47   // the value of sp and youngerSP that is stored in this object
  48   // is always, always, always the value that would be found in the
  49   // register (or window save area) while the target VM was executing.
  50   // The caller of the constructor will alwasy know if has a biased or
  51   // unbiased version of the stack pointer and can convert real (unbiased)
  52   // value via a helper routine we supply.
  53   // Whenever we return sp or youngerSP values we do not return the internal
  54   // value but the real (unbiased) pointers since these are the true, usable
  55   // memory addresses. The outlier case is that of the null pointer. The current
  56   // mechanism makes null pointers always look null whether biased or not.
  57   // This seems to cause no problems. In theory null real pointers could be biased


 575     // sender's _interpreter_sp_adjustment field.
 576     if (VM.getVM().getInterpreter().contains(pc)) {
 577       isInterpreted = true;
 578       map.makeIntegerRegsUnsaved();
 579       map.shiftWindow(sp, youngerSP);
 580     } else {
 581       // Find a CodeBlob containing this frame's pc or elide the lookup and use the
 582       // supplied blob which is already known to be associated with this frame.
 583       cb = VM.getVM().getCodeCache().findBlob(pc);
 584       if (cb != null) {
 585         // Update the location of all implicitly saved registers
 586         // as the address of these registers in the register save
 587         // area (for %o registers we use the address of the %i
 588         // register in the next younger frame)
 589         map.shiftWindow(sp, youngerSP);
 590         if (map.getUpdateMap()) {
 591           if (cb.callerMustGCArguments()) {
 592             map.setIncludeArgumentOops(true);
 593           }
 594           if (cb.getOopMaps() != null) {
 595             OopMapSet.updateRegisterMap(this, cb, map, VM.getVM().isDebugging());
 596           }
 597         }
 598       }
 599     }
 600 
 601     return new SPARCFrame(biasSP(sp), biasSP(youngerSP), isInterpreted);
 602   }
 603 
 604   protected boolean hasSenderPD() {
 605     try {
 606       // FIXME: should not happen!!!
 607       if (getSP() == null) {
 608         return false;
 609       }
 610       if ( unBiasSP(getSP().getAddressAt(SPARCRegisters.FP.spOffsetInSavedWindow())) == null ) {
 611         return false;
 612       }
 613       return true;
 614     } catch (RuntimeException e) {
 615       if (DEBUG) {




   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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  *
  23  */
  24 
  25 package sun.jvm.hotspot.runtime.sparc;
  26 


  27 import sun.jvm.hotspot.asm.sparc.*;
  28 import sun.jvm.hotspot.code.*;
  29 import sun.jvm.hotspot.compiler.*;
  30 import sun.jvm.hotspot.debugger.*;
  31 import sun.jvm.hotspot.debugger.cdbg.*;
  32 import sun.jvm.hotspot.oops.*;
  33 import sun.jvm.hotspot.runtime.*;
  34 import sun.jvm.hotspot.runtime.posix.*;

  35 import sun.jvm.hotspot.utilities.*;
  36 
  37 /** Specialization of and implementation of abstract methods of the
  38     Frame class for the SPARC CPU. (FIXME: this is as quick a port as
  39     possible to get things running; will have to do a better job right
  40     away.) */
  41 
  42 public class SPARCFrame extends Frame {
  43   // The pc value is the raw return address, plus 8 (pcReturnOffset()).
  44   // the value of sp and youngerSP that is stored in this object
  45   // is always, always, always the value that would be found in the
  46   // register (or window save area) while the target VM was executing.
  47   // The caller of the constructor will alwasy know if has a biased or
  48   // unbiased version of the stack pointer and can convert real (unbiased)
  49   // value via a helper routine we supply.
  50   // Whenever we return sp or youngerSP values we do not return the internal
  51   // value but the real (unbiased) pointers since these are the true, usable
  52   // memory addresses. The outlier case is that of the null pointer. The current
  53   // mechanism makes null pointers always look null whether biased or not.
  54   // This seems to cause no problems. In theory null real pointers could be biased


 572     // sender's _interpreter_sp_adjustment field.
 573     if (VM.getVM().getInterpreter().contains(pc)) {
 574       isInterpreted = true;
 575       map.makeIntegerRegsUnsaved();
 576       map.shiftWindow(sp, youngerSP);
 577     } else {
 578       // Find a CodeBlob containing this frame's pc or elide the lookup and use the
 579       // supplied blob which is already known to be associated with this frame.
 580       cb = VM.getVM().getCodeCache().findBlob(pc);
 581       if (cb != null) {
 582         // Update the location of all implicitly saved registers
 583         // as the address of these registers in the register save
 584         // area (for %o registers we use the address of the %i
 585         // register in the next younger frame)
 586         map.shiftWindow(sp, youngerSP);
 587         if (map.getUpdateMap()) {
 588           if (cb.callerMustGCArguments()) {
 589             map.setIncludeArgumentOops(true);
 590           }
 591           if (cb.getOopMaps() != null) {
 592             ImmutableOopMapSet.updateRegisterMap(this, cb, map, VM.getVM().isDebugging());
 593           }
 594         }
 595       }
 596     }
 597 
 598     return new SPARCFrame(biasSP(sp), biasSP(youngerSP), isInterpreted);
 599   }
 600 
 601   protected boolean hasSenderPD() {
 602     try {
 603       // FIXME: should not happen!!!
 604       if (getSP() == null) {
 605         return false;
 606       }
 607       if ( unBiasSP(getSP().getAddressAt(SPARCRegisters.FP.spOffsetInSavedWindow())) == null ) {
 608         return false;
 609       }
 610       return true;
 611     } catch (RuntimeException e) {
 612       if (DEBUG) {


agent/src/share/classes/sun/jvm/hotspot/runtime/sparc/SPARCFrame.java
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