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  1. JDK
  2. JDK-8217994

os::print_hex_dump should be more resilient against unreadable memory

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      Description

        Today, accidentally calling os::print_hex_dump on unreadable memory would SEGV. It would probably be the second SEGV in the error reporting code that wants to dump some raw memory. We can use os::is_readable_pointer to query readable memory before reading it. For example:
         http://cr.openjdk.java.net/~shade/8217994/webrev.01/

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            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-8219340 os::print_hex_dump should be more resilient against unreadable memory

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8219345 os::print_hex_dump should be more resilient against unreadable memory

            • P4 - Minor loss of function, or other problem where easy workaround is present.
            • 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-8226578 os::print_hex_dump should be more resilient against unreadable memory

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

            Enhancement - null JDK-8293851 hs_err should print more stack in hex dump

            • 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-8219650 [TESTBUG] Fix crashes in new test hotspot gtest "test_print_hex_dump"

            • P3 - Major loss of function.
            • Resolved

            Bug - A problem which impairs or prevents the functions of the product. JDK-8257828 SafeFetch may crash if invoked in non-JavaThreads

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

            Enhancement - null JDK-8217879 hs_err should print more instructions in hex dump

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

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                shade Aleksey Shipilev
                shade Aleksey Shipilev
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                  Created:
                  Updated:
                  Resolved: