[cfe-dev] rfc: Adding a mode to -gline-tables-only to include parameter names, namespaces

[Nico Weber]

Hi,

the motivation for -gline-tables-only was to make debug info much smaller,
but still include enough to get usable stack frames [1]. We recently tried
using it in Chromium and discovered that the stack frames aren't all that
usable: Function parameters disappear, as do function namespaces.

Are there any concerns about adding a mode to -gline-tables-only (or a
second flag -gline-tables-full, or similar) that includes function
parameter info and namespace info but still omits most debug info?

(Background: We rely on dsym files to let our crash server symbolize crash
dumps we get from the wild. dsymutil uses debug info, but it apparently
crashes if debug info is > 4GB. We hit that recently. So we started using
-gline-tables-only, but now all our stacks are close to unusable, even
though the motivation for gline-tables-only was to still have usable
stacks. We can't easily use symbol names as they get stripped very early in
our pipeline, and changing that is apparently involved.)

Thanks,
Nico


1:
http://lists.cs.uiuc.edu/pipermail/cfe-commits/Week-of-Mon-20120423/056674.html
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