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[SR-14279] Adding debug info increases the size of unwind info sections #56638

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swift-ci opened this issue Feb 26, 2021 · 1 comment
Open

[SR-14279] Adding debug info increases the size of unwind info sections #56638

swift-ci opened this issue Feb 26, 2021 · 1 comment
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself

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@swift-ci
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Previous ID SR-14279
Radar rdar://problem/74878525
Original Reporter richardh (JIRA User)
Type Bug
Additional Detail from JIRA
Votes 0
Component/s Compiler
Labels Bug
Assignee None
Priority Medium

md5: 561e269a107fa9029588a48af6fc1710

Issue Description:

In a medium sized Swift application, when enabling debug info in a release build we see a measurable increase in the size of __unwind_info and __eh_frame sections. Running size -m shows:

No debug info:

Section __unwind_info: 165560
Section __eh_frame: 90336

With gline-tables-only:

Section __unwind_info: 227020
Section __eh_frame: 254128

This adds up to an increase of roughly 230kb increase. Is this increase expected or is there some flag that can be used to control this?
@typesanitizer
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@swift-ci swift-ci transferred this issue from apple/swift-issues Apr 25, 2022
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bug A deviation from expected or documented behavior. Also: expected but undesirable behavior. compiler The Swift compiler in itself
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@typesanitizer @swift-ci