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  1. JDK
  2. JDK-8225716

G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

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    • gc
    • b26
    • Not verified

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      Description

        The Block Offset Table is accessed racily in many places. This is UB, but I suspect the authors of G1 assumed that the UB was "benign". In fact it is not, and there is a narrow race condition which causes G1 to crash at times of heavy stress.

        The bug has only ever been observed on 86-32, but it isn't a target-specific bug. It's probably not specific to G1 either.

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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-8226390 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8226405 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8226481 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8226864 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8227344 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8228014 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8228229 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8246885 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • 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-8230722 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed

            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-8241084 G1 GC: Undefined behaviour in G1BlockOffsetTablePart::block_at_or_preceding

            • P2 - Crashes, loss of data, severe memory leak.
            • Closed
            relates to

            Bug - A problem which impairs or prevents the functions of the product. JDK-8225809 Investigate JDK-8225716 impact on other generational collectors

            • P2 - Crashes, loss of data, severe memory leak.
            • Resolved

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                aph Andrew Haley
                aph Andrew Haley
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                  Updated:
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