JDK-7178741 : SA: jstack -m produce UnalignedAddressException in output (Linux)
  • Type: Bug
  • Component: hotspot
  • Sub-Component: svc
  • Affected Version: hs23.2,6u33-rev,6u34,7u6,7u40
  • Priority: P2
  • Status: Resolved
  • Resolution: Fixed
  • OS: linux
  • CPU: x86
  • Submitted: 2012-06-21
  • Updated: 2013-06-26
  • Resolved: 2012-06-29
The Version table provides details related to the release that this issue/RFE will be addressed.

Unresolved : Release in which this issue/RFE will be addressed.
Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 6 JDK 7 JDK 8 Other
6u33 b33Fixed 7u40Fixed 8Fixed hs20.8Fixed
Related Reports
Relates :  
JDK-6313816 - SA: jstack -m fails on Win32 : UnalignedAddressException
Relates :  
JDK-2226279 - SA: jstack -m produce failures in output
Relates :  
JDK-6310967 - SA: jstack -m produce failures in output
Description
6310967 status is fix delivered.
But issue is reproducible with linux-i586 jdk6u33b32.
Comments
This bug 7178741 will include the fixes for this problem Linux on x86 and x64. They are similar to what went in to jdk6. I will relate this to bug 6313816 which describes the same problem on Windows (x86 and x64 are affected), so that bug can provide a separate fix on Windows, as the fix is not quite the same.
21-02-2013
EVALUATION I printed the ebp and esp values in sender() method from a run on linux-i586 system. The ebp and esp values are invalid. esp is null and ebp also does not contain the valid frame pointer. ----------------- 16864 ----------------- 0xf7704430 ???????? In sender: ebp is: 0xf6a70ed0 In Sender: esp is: null 0x0a974208 ???????? In sender: ebp is: 0x4fe82d42 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x4fe82d42 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) ----------------- 16865 ----------------- 0xf7704430 ???????? In sender: ebp is: 0x00000003 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x00000003 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) ----------------- 16866 ----------------- 0xf7704430 ???????? In sender: ebp is: 0x00000003 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x00000003 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) ----------------- 16867 ----------------- 0xf7704430 ???????? In sender: ebp is: 0x00000003 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x00000003 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) ----------------- 16868 ----------------- 0xf7704430 ???????? In sender: ebp is: 0x00000003 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x00000003 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) ----------------- 16869 ----------------- 0xf7704430 ???????? In sender: ebp is: 0x00000003 In Sender: esp is: null sun.jvm.hotspot.debugger.UnalignedAddressException: Trying to read at address: 0x00000003 with alignment: 4 at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal$1.checkAlignment(LinuxDebuggerLocal.java:181) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readCInteger(LinuxDebuggerLocal.java:480) at sun.jvm.hotspot.debugger.DebuggerBase.readAddressValue(DebuggerBase.java:454) at sun.jvm.hotspot.debugger.linux.LinuxDebuggerLocal.readAddress(LinuxDebuggerLocal.java:423) at sun.jvm.hotspot.debugger.linux.LinuxAddress.getAddressAt(LinuxAddress.java:74) at sun.jvm.hotspot.debugger.linux.x86.LinuxX86CFrame.sender(LinuxX86CFrame.java:68) at sun.jvm.hotspot.tools.PStack.run(PStack.java:161) at sun.jvm.hotspot.tools.PStack.run(PStack.java:53) at sun.jvm.hotspot.tools.PStack.run(PStack.java:48) at sun.jvm.hotspot.tools.JStack.run(JStack.java:60) at sun.jvm.hotspot.tools.Tool.start(Tool.java:221) at sun.jvm.hotspot.tools.JStack.main(JStack.java:86) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at sun.tools.jstack.JStack.runJStackTool(JStack.java:118) at sun.tools.jstack.JStack.main(JStack.java:84) So, the real fix for this issue would be to figure out why the ThreadContext on some linux platforms is not set correctly.
26-06-2012
EVALUATION This failure happens when on some Linux platforms, ThreadContext is not populated correctly and esp is found out to be null in sender(). The correct solution for that would be to find out why the ThreadContext register values are not correct. But to complete the fix for 6310967 and to fix this regression, I think it would be good to add a check for the alignment of rbp/ebp values in sender() methods.
25-06-2012