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  1. JDK
  2. JDK-8028623

SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

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    • b03
    • generic
    • generic

    Backports

      Description


        For some Strings containing extended characters, the SA fails to find the String in its SymbolTable as the hash code it calculates does not match that which is stored in the table (which came from
        java_lang_String::hash_code).

        This manifests as jmap -F failing to dump a heap with:

        Exception in thread "main" java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:491)
        at sun.tools.jmap.JMap.runTool(JMap.java:197)
        at sun.tools.jmap.JMap.main(JMap.java:128)
        Caused by: java.lang.NullPointerException
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeSymbolID(HeapHprofBinWriter.java:995)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeFieldDescriptors(HeapHprofBinWriter.java:828)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeClassDumpRecord(HeapHprofBinWriter.java:587)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.access$000(HeapHprofBinWriter.java:310)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter$1.visit(HeapHprofBinWriter.java:524)
        at sun.jvm.hotspot.memory.SystemDictionary$2.visit(SystemDictionary.java:179)
        at sun.jvm.hotspot.memory.Dictionary.classesDo(Dictionary.java:68)
        at sun.jvm.hotspot.memory.SystemDictionary.classesDo(SystemDictionary.java:190)
        at sun.jvm.hotspot.memory.SystemDictionary.allClassesDo(SystemDictionary.java:183)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.writeClassDumpRecords(HeapHprofBinWriter.java:520)
        at sun.jvm.hotspot.utilities.HeapHprofBinWriter.write(HeapHprofBinWriter.java:430)
        at sun.jvm.hotspot.tools.HeapDumper.run(HeapDumper.java:62)
        at sun.jvm.hotspot.tools.Tool.startInternal(Tool.java:260)
        at sun.jvm.hotspot.tools.Tool.start(Tool.java:223)
        at sun.jvm.hotspot.tools.Tool.execute(Tool.java:118)
        at sun.jvm.hotspot.tools.HeapDumper.main(HeapDumper.java:83)
        ... 6 more

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            backported by

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8035748 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8038477 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8045227 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8050329 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8053231 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8057289 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8060856 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Resolved

            Backport - A issue that is required to port a Bug or Feature into another product release. This issue type is generally associated with the main Bug/Feature to represent each individual release of the port. JDK-8044699 SA: hash codes in SymbolTable mismatching java_lang_String::hash_code for extended characters.

            • P3 - Major loss of function.
            • Closed
            duplicates

            Bug - A problem which impairs or prevents the functions of the product. JDK-8023105 jmap fails with NullPointerException at HeapHprofBinWriter.writeSymbolID()

            • P3 - Major loss of function.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8061785 [TEST_BUG] serviceability/sa/jmap-hashcode/Test8028623.java has utf8 character corrupted by earlier merge

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8032466 serviceability/sa/jmap-hashcode/Test8028623.java fails with compilation errors

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8043915 Tests get ClassNotFoundException: com.oracle.java.testlibrary.StreamPumper

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8039995 Test serviceability/sa/jmap-hashcode/Test8028623.java fails on some Linux/Mac machines.

            • P3 - Major loss of function.
            • Closed

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                kevinw Kevin Walls
                kevinw Kevin Walls
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                  Updated:
                  Resolved: