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Posted to issues-all@impala.apache.org by "Michael Ho (JIRA)" <ji...@apache.org> on 2018/09/08 00:40:00 UTC
[jira] [Commented] (IMPALA-3164) Debugging support for codegen'd
code
[ https://issues.apache.org/jira/browse/IMPALA-3164?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16607819#comment-16607819 ]
Michael Ho commented on IMPALA-3164:
------------------------------------
Not actively working on it.
> Debugging support for codegen'd code
> ------------------------------------
>
> Key: IMPALA-3164
> URL: https://issues.apache.org/jira/browse/IMPALA-3164
> Project: IMPALA
> Issue Type: Improvement
> Components: Backend
> Affects Versions: Impala 2.6.0
> Reporter: Tim Armstrong
> Priority: Minor
> Labels: codegen
>
> After the switch to MCJIT and LLVM 3.7.0 (IMPALA-775) it should be possible to debug codegened code, since MCJIT can emit DWARF debug info and gdb versions 7 and higher support finding the debug info for LLVM's jitted code. (Ref http://llvm.org/docs/DebuggingJITedCode.html) There are a few things to do to make sure that this works well:
> * Get LLVM to emit cross-compiled code with debug symbols for the debug build
> * Work out how to add debug symbols to IRBuilder-generated code (maybe with the DebugIR LLVM pass).
> * Test that it actually works
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