git

commit d4d2925877658f875237a0201a038934d42da1dd
parent 324b7420fc7544ee3c133f367a0157aa8d6885fc
Author: Luís Ferreira <[email protected]>
Date:   Fri, 17 Dec 2021 00:38:30 +0000

posts: Add 'SAOC LLDB D integration: 13th Weekly Update'

Signed-off-by: Luís Ferreira <[email protected]>

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content/posts/d-saoc-2021-12.md
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content/posts/d-saoc-2021-13.md
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2 files changed, 60 insertions(+), 1 deletion(-)
diff --git a/content/posts/d-saoc-2021-12.md b/content/posts/d-saoc-2021-12.md
@@ -68,4 +68,5 @@ You can also read this on the D programming language forum,
 [here](https://forum.dlang.org/thread/[email protected]),
 and discuss there!
 
-Read about the [previous week](../d-saoc-2021-11/).
+Read about the [previous week](../d-saoc-2021-11/) and the [next
+week](../d-saoc-2021-13/).
diff --git a/content/posts/d-saoc-2021-13.md b/content/posts/d-saoc-2021-13.md
@@ -0,0 +1,58 @@
+---
+title: 'SAOC LLDB D integration: 13th Weekly Update'
+date: '2021-12-16T23:34:00+01:00'
+tags: ['saoc', 'saoc2021', 'dlang', 'llvm', 'lldb', 'debug', 'debugging', 'dwarf']
+description: "This post describes what I've done on the 13th week of the
+Symmetry Autumn of Code 2021, including some bug fixes and trivial patches."
+---
+
+Hi D community!
+
+I'm here again, to describe what I've done during the thirteenth week of
+Symmetry Autumn of Code. This week as a bit atypical as I got infected with
+COVID-19 and this made me feel exhausted both physically and mentally.
+
+## Working approach to fetch basic types
+
+After digging a bit about the problem I found out there is no problem
+specifically in Release builds, and a simple function called `Verify` is there
+to double check if the type is correct for Debug builds. After fixing that
+function, the LLDB can now dump some simple output about global TLS and non-TLS
+variables:
+
+```
+(lldb) ta v
+Global variables for app.d in app:
+app.bar = <No TLS data currently exists for this thread.>
+
+app.ptr = <could not resolve type>
+app.foobar =
+```
+
+For now it only recognizes boolean types, but it can't show up the value since
+LLDB doesn't know a way to dump it correctly.
+
+You can try this version yourself using
+[this](https://github.com/devtty63/llvm-project/tree/lldb-d/implement-typesystem-d)
+branch.
+
+## Decoupling and trivial patches
+
+I pushed a patch to decouple DWARF to LLDB encoding logic from Clang DWARF AST
+Parser, along with a trivial fix about duplicate map assignment:
+
+- https://reviews.llvm.org/D115662
+- https://reviews.llvm.org/D115663
+
+## What is next?
+
+I already started working on some helpers to fetch the LLDB Format, Encoding
+and BasicType, along with other information about a type to properly display
+them. I'm not sure how Milestone 4 is going to work, as I underestimated
+the support for custom expessions.
+
+You can also read this on the D programming language forum,
+[here](https://forum.dlang.org/thread/[email protected]),
+and discuss there!
+
+Read about the [previous week](../d-saoc-2021-12/).