[swift-users] DWARF without DSYM

[Dmitry Shevchenko]

Ah I see, the dsym job is only created when the driver will also link the
final product, in Xcode build case, it separates the linking step.

On Fri, Aug 26, 2016 at 5:35 PM Dmitry Shevchenko <dmishe at google.com> wrote:

> I experimented in Xcode, and with DWARF w/o dSYM selected, debugging still
> works. And even though -g option is passed to swiftc, there's no dSYM
> generation occurring. So besides -g, what else makes swiftc issues that
> dsymutil call?
>
> On Fri, Aug 26, 2016 at 3:37 PM Jim Ingham <jingham at apple.com> wrote:
>
>> dsymutil is only given the .o files and the executable - same thing lldb
>> sees.  So if it can find the module map to copy it into the dSYM, lldb can
>> find it and load it without the dSYM.  So whether it does work or not, it
>> should be able to.
>>
>> Jim
>>
>> > On Aug 26, 2016, at 11:37 AM, Jordan Rose via swift-users <
>> swift-users at swift.org> wrote:
>> >
>> > I suppose it can, but in theory the module that goes into the dSYM
>> wouldn't be the same as the one that gets used by clients of a library.
>> (Example: the one in the dSYM needs to have info about private types.) Sean
>> can probably explain better than I can.
>> >
>> > Jordan
>> >
>> >
>> >> On Aug 26, 2016, at 9:36, Dmitry Shevchenko <dmishe at google.com> wrote:
>> >>
>> >> I see. I thought LLDB can import modules independently of sources,
>> isn't that what target.swift-module-search-paths option is for?
>> >>
>> >> On Thu, Aug 25, 2016 at 4:15 PM Jordan Rose <jordan_rose at apple.com>
>> wrote:
>> >> Plain DWARF isn't sufficient to debug a Swift program (we actually
>> stuff the entire swiftmodule into the dSYM), but if you just want to trace
>> execution you should be able to use -gline-tables-only.
>> >>
>> >> Jordan
>> >>
>> >>
>> >> > On Aug 25, 2016, at 13:10, Dmitry Shevchenko via swift-users <
>> swift-users at swift.org> wrote:
>> >> >
>> >> > Can swiftc generate debug info without a separate dSYM bundle? -g
>> option looks to always generate a dSYM.
>> >> > _______________________________________________
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>> >> > swift-users at swift.org
>> >> > https://lists.swift.org/mailman/listinfo/swift-users
>> >>
>> >
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>>
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