[Webkit-unassigned] [Bug 115167] New: REGRESSION(r137994): Random crashes in Yarr JIT for SH4 arch

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=115167

           Summary: REGRESSION(r137994): Random crashes in Yarr JIT for
                    SH4 arch
           Product: WebKit
           Version: 528+ (Nightly build)
          Platform: Unspecified
        OS/Version: Unspecified
            Status: UNCONFIRMED
          Severity: Normal
          Priority: P2
         Component: JavaScriptCore
        AssignedTo: webkit-unassigned at lists.webkit.org
        ReportedBy: jbrianceau at nds.com


Random crashes seen when using SH4 RegExp JIT. These crashes "disappear" if "JSC_useRegExpJIT=false" environment variable is set.

Unit test to reproduce:
$ ./jsc -s Source/JavaScriptCore/tests/mozilla/ecma_3/shell.js -s Source/JavaScriptCore/tests/mozilla/ecma_3/RegExp/shell.js /usr/WebKit-jsc/jsctest/ecma_3/RegExp/perlstress-001.js

According to http://trac.webkit.org/changeset/144170 and http://trac.webkit.org/changeset/145194, I also suspect that SH4 cacheFlush() should also be aligned on page size (or function receives incorrect values from caller).

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