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.debugger.linux.amd64; 26 27 import sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.debugger.amd64.*; 29 import sun.jvm.hotspot.debugger.linux.*; 30 import sun.jvm.hotspot.debugger.cdbg.*; 31 import sun.jvm.hotspot.debugger.cdbg.basic.*; 32 33 final public class LinuxAMD64CFrame extends BasicCFrame { 34 35 public static LinuxAMD64CFrame getTopFrame(LinuxDebugger dbg, Address rip, ThreadContext context) { 36 Address libptr = dbg.findLibPtrByAddress(rip); 37 Address cfa = context.getRegisterAsAddress(AMD64ThreadContext.RBP); 38 DwarfParser dwarf = null; 39 40 if (libptr != null) { // Native frame 41 try { 42 dwarf = new DwarfParser(libptr); 43 dwarf.processDwarf(rip); 44 cfa = ((dwarf.getCFARegister() == AMD64ThreadContext.RBP) && 45 !dwarf.isBPOffsetAvailable()) 46 ? context.getRegisterAsAddress(AMD64ThreadContext.RBP) 47 : context.getRegisterAsAddress(dwarf.getCFARegister()) 48 .addOffsetTo(dwarf.getCFAOffset()); 49 } catch (DebuggerException e) { 50 // Bail out to Java frame case 51 } 52 } 53 54 return (cfa == null) ? null 55 : new LinuxAMD64CFrame(dbg, cfa, rip, dwarf); 56 } 57 58 private LinuxAMD64CFrame(LinuxDebugger dbg, Address cfa, Address rip, DwarfParser dwarf) { 59 super(dbg.getCDebugger()); 60 this.cfa = cfa; 61 this.rip = rip; 62 this.dbg = dbg; 63 this.dwarf = dwarf; 64 } 65 66 // override base class impl to avoid ELF parsing 67 public ClosestSymbol closestSymbolToPC() { 68 // try native lookup in debugger. 69 return dbg.lookup(dbg.getAddressValue(pc())); 70 } 71 72 public Address pc() { 73 return rip; 74 } 75 76 public Address localVariableBase() { 77 return cfa; 78 } 79 80 private Address getNextPC(boolean useDwarf) { 81 try { 82 long offs = useDwarf ? dwarf.getReturnAddressOffsetFromCFA() 83 : ADDRESS_SIZE; 106 if (!dwarf.isBPOffsetAvailable() && // Use RBP as CFA 107 (nextCFAReg == AMD64ThreadContext.RBP) && 108 (nextCFAReg != dwarf.getCFARegister())) { 109 nextCFA = context.getRegisterAsAddress(AMD64ThreadContext.RBP); 110 if (nextCFA == null) { 111 return null; 112 } 113 nextCFA = nextCFA.getAddressAt(0); 114 } else { 115 nextCFA = cfa.getAddressAt(dwarf.getBasePointerOffsetFromCFA()); 116 } 117 } 118 if (nextCFA != null) { 119 nextCFA = nextCFA.addOffsetTo(-nextDwarf.getBasePointerOffsetFromCFA()); 120 } 121 } 122 123 return isValidFrame(nextCFA, context) ? nextCFA : null; 124 } 125 126 private DwarfParser getNextDwarf(Address nextPC) { 127 DwarfParser nextDwarf = null; 128 129 if ((dwarf != null) && dwarf.isIn(nextPC)) { 130 nextDwarf = dwarf; 131 } else { 132 Address libptr = dbg.findLibPtrByAddress(nextPC); 133 if (libptr != null) { 134 try { 135 nextDwarf = new DwarfParser(libptr); 136 } catch (DebuggerException e) { 137 // Bail out to Java frame 138 } 139 } 140 } 141 142 if (nextDwarf != null) { 143 nextDwarf.processDwarf(nextPC); 144 } 145 146 return nextDwarf; 147 } 148 149 @Override 150 public CFrame sender(ThreadProxy thread) { 151 ThreadContext context = thread.getContext(); 152 153 Address nextPC = getNextPC(dwarf != null); 154 if (nextPC == null) { 155 return null; 156 } 157 158 DwarfParser nextDwarf = getNextDwarf(nextPC); 159 Address nextCFA = getNextCFA(nextDwarf, context); 160 return isValidFrame(nextCFA, context) ? new LinuxAMD64CFrame(dbg, nextCFA, nextPC, nextDwarf) 161 : null; 162 } 163 164 // package/class internals only 165 private static final int ADDRESS_SIZE = 8; 166 private Address rip; 167 private Address cfa; 168 private LinuxDebugger dbg; 169 private DwarfParser dwarf; 170 } | 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.debugger.linux.amd64; 26 27 import sun.jvm.hotspot.debugger.*; 28 import sun.jvm.hotspot.debugger.amd64.*; 29 import sun.jvm.hotspot.debugger.linux.*; 30 import sun.jvm.hotspot.debugger.cdbg.*; 31 import sun.jvm.hotspot.debugger.cdbg.basic.*; 32 33 final public class LinuxAMD64CFrame extends BasicCFrame { 34 35 public static LinuxAMD64CFrame getTopFrame(LinuxDebugger dbg, Address rip, ThreadContext context) { 36 Address libptr = dbg.findLibPtrByAddress(rip); 37 Address cfa = context.getRegisterAsAddress(AMD64ThreadContext.RBP); 38 DwarfParser dwarf = null; 39 boolean unsupportedDwarf = false; 40 41 if (libptr != null) { // Native frame 42 try { 43 dwarf = new DwarfParser(libptr); 44 dwarf.processDwarf(rip); 45 cfa = ((dwarf.getCFARegister() == AMD64ThreadContext.RBP) && 46 !dwarf.isBPOffsetAvailable()) 47 ? context.getRegisterAsAddress(AMD64ThreadContext.RBP) 48 : context.getRegisterAsAddress(dwarf.getCFARegister()) 49 .addOffsetTo(dwarf.getCFAOffset()); 50 } catch (DebuggerException e) { 51 if (dwarf != null) { 52 // DWARF processing should succeed when the frame is native 53 // but it might fail if CIE has language personality routine 54 // and/or LSDA. 55 dwarf = null; 56 unsupportedDwarf = true; 57 } else { 58 throw e; 59 } 60 } 61 } 62 63 return (cfa == null) ? null 64 : new LinuxAMD64CFrame(dbg, cfa, rip, dwarf, !unsupportedDwarf); 65 } 66 67 private LinuxAMD64CFrame(LinuxDebugger dbg, Address cfa, Address rip, DwarfParser dwarf, boolean possibleNext) { 68 super(dbg.getCDebugger()); 69 this.cfa = cfa; 70 this.rip = rip; 71 this.dbg = dbg; 72 this.dwarf = dwarf; 73 this.possibleNext = possibleNext; 74 } 75 76 // override base class impl to avoid ELF parsing 77 public ClosestSymbol closestSymbolToPC() { 78 // try native lookup in debugger. 79 return dbg.lookup(dbg.getAddressValue(pc())); 80 } 81 82 public Address pc() { 83 return rip; 84 } 85 86 public Address localVariableBase() { 87 return cfa; 88 } 89 90 private Address getNextPC(boolean useDwarf) { 91 try { 92 long offs = useDwarf ? dwarf.getReturnAddressOffsetFromCFA() 93 : ADDRESS_SIZE; 116 if (!dwarf.isBPOffsetAvailable() && // Use RBP as CFA 117 (nextCFAReg == AMD64ThreadContext.RBP) && 118 (nextCFAReg != dwarf.getCFARegister())) { 119 nextCFA = context.getRegisterAsAddress(AMD64ThreadContext.RBP); 120 if (nextCFA == null) { 121 return null; 122 } 123 nextCFA = nextCFA.getAddressAt(0); 124 } else { 125 nextCFA = cfa.getAddressAt(dwarf.getBasePointerOffsetFromCFA()); 126 } 127 } 128 if (nextCFA != null) { 129 nextCFA = nextCFA.addOffsetTo(-nextDwarf.getBasePointerOffsetFromCFA()); 130 } 131 } 132 133 return isValidFrame(nextCFA, context) ? nextCFA : null; 134 } 135 136 @Override 137 public CFrame sender(ThreadProxy thread) { 138 if (!possibleNext) { 139 return null; 140 } 141 142 ThreadContext context = thread.getContext(); 143 144 Address nextPC = getNextPC(dwarf != null); 145 if (nextPC == null) { 146 return null; 147 } 148 149 DwarfParser nextDwarf = null; 150 boolean unsupportedDwarf = false; 151 if ((dwarf != null) && dwarf.isIn(nextPC)) { 152 nextDwarf = dwarf; 153 } else { 154 Address libptr = dbg.findLibPtrByAddress(nextPC); 155 if (libptr != null) { 156 try { 157 nextDwarf = new DwarfParser(libptr); 158 } catch (DebuggerException e) { 159 // Bail out to Java frame 160 } 161 } 162 } 163 164 if (nextDwarf != null) { 165 try { 166 nextDwarf.processDwarf(nextPC); 167 } catch (DebuggerException e) { 168 // DWARF processing should succeed when the frame is native 169 // but it might fail if CIE has language personality routine 170 // and/or LSDA. 171 nextDwarf = null; 172 unsupportedDwarf = true; 173 } 174 } 175 176 Address nextCFA = getNextCFA(nextDwarf, context); 177 LinuxAMD64CFrame nextFrame = new LinuxAMD64CFrame(dbg, nextCFA, nextPC, nextDwarf, !unsupportedDwarf); 178 return isValidFrame(nextCFA, context) ? nextFrame : null; 179 } 180 181 // package/class internals only 182 private static final int ADDRESS_SIZE = 8; 183 private Address rip; 184 private Address cfa; 185 private LinuxDebugger dbg; 186 private DwarfParser dwarf; 187 private boolean possibleNext; 188 } |