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add separate ptr data section #18978

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dlangBugzillaToGithub opened this issue Apr 20, 2015 · 2 comments
Open

add separate ptr data section #18978

dlangBugzillaToGithub opened this issue Apr 20, 2015 · 2 comments
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P4 Severity:Enhancement

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Martin Nowak (@MartinNowak) reported this on 2015-04-20T14:13:55Z

Transferred from https://issues.dlang.org/show_bug.cgi?id=14472

Description

We should emit mutable data that can't alias GC memory to a separate .noptr section, so that it can be excluded when scanning GC roots.
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code (@MartinNowak) commented on 2015-09-06T20:53:14Z

Might make more sense to add a special ptrdata section, so that the GC only has to scan that.

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code (@MartinNowak) commented on 2015-09-07T15:44:19Z

Something along this line from Rainer.
https://github.com/D-Programming-Language/dmd/pull/5047#issuecomment-138125410
https://github.com/rainers/dmd/commit/e6a3d1778ad2969fc7bcb378a084b8d865b015c7

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