Yes, although having the compiler create the file is reasonable in many
cases, remote debugging of programs compiled on a device (which is a
strong use-case for us) is more problematic, as the debugger would then
need to download the generated source from the device and place it in
the specified location in the DWARF, fix up the DWARF itself, or some
other non-standard magic. HSA also doesn't mandate a filesystem and
might be used on systems with read-only filesystems, so the scenario
which Paul outlines is a real possibility.
I'm not familiar with the release schedule of the DWARF standard, so you
all would be best to make that call. I read in the mailing list archives
that the v5 deadline is long gone, so I guess v6 would be the target.
On 09/06/16 19:02, Robinson, Paul wrote:
In principle you could have generated source JIT-compiled on a device
that has no filesystem in the usual sense, or maybe has one but it
isn't writable.
Seems like a reasonable approach.
--paulr
*From:*Dwarf-Discuss [mailto:dwarf-discuss-boun...@lists.dwarfstd.org]
*On Behalf Of *Bishop, John E
*Sent:* Thursday, June 09, 2016 10:10 AM
*To:* dwarf-discuss@lists.dwarfstd.org
*Subject:* Re: [Dwarf-Discuss] DWARF and online-compiled programs
(Simon Brand)
--[ quote ]--
I'm writing this email in particular to address the problem of
referencing source files in DWARF for online-compiled programs. The
issue is that programming models such as OpenCL can often have source
generated at runtime,which is compiled online, with its output not
written to file. This raises an issue for the compiler: in the
generated DWARF, what should it put as the file name of the compile
unit and associated line table information?
--[ end quote ]—
I’m inclined to say that in the general case the compiler should
create an actual file and use it, but I like the in-the-binary
solution for short pseudo-sources.
This would go into V6, right?
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