Bug 76413
| Summary: | crash in JIT with PAX memory protection | ||
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| Product: | WebKit | Reporter: | Michael Gilbert <michael.s.gilbert> |
| Component: | JavaScriptCore | Assignee: | Nobody <webkit-unassigned> |
| Status: | UNCONFIRMED | ||
| Severity: | Normal | CC: | barraclough, bugmenot, rdieter, self |
| Priority: | P2 | ||
| Version: | 528+ (Nightly build) | ||
| Hardware: | PC | ||
| OS: | Linux | ||
| URL: | http://bugs.debian.org/605132 | ||
| See Also: | https://bugs.webkit.org/show_bug.cgi?id=35154 | ||
Michael Gilbert
Webkit's JIT compiler is incompatible with strong memory protections as provided by PAX. See debian bug report: http://bugs.debian.org/605132
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| Add attachment proposed patch, testcase, etc. |
Gavin Barraclough
Anyone interested in making this work should have two options here.
(1) turn on ASSEMBLER_WX_EXCLUSIVE. This may not be well tested lately in ToT, but will stop allocating WX memory.
(2) Set the flags in Platform.h to compile in both the JIT & the interpreter. If the JIT buffer allocation fails it should automatically fall back to use the JIT.
Stijn van Drongelen
*** Bug 105730 has been marked as a duplicate of this bug. ***
Alexey Proskuryakov
*** Bug 147542 has been marked as a duplicate of this bug. ***