[Git][ghc/ghc][wip/js-fileStat] Add comment explaining the use of Emscripten's `stat` layout.

[Josh Meredith (@JoshMeredith)]

Josh Meredith pushed to branch wip/js-fileStat at Glasgow Haskell Compiler / GHC


Commits:
6af8bfb5 by Josh Meredith at 2023-01-19T11:11:18+00:00
Add comment explaining the use of Emscripten's `stat` layout.

- - - - -


1 changed file:

- libraries/base/jsbits/base.js


Changes:

=====================================
libraries/base/jsbits/base.js
=====================================
@@ -452,6 +452,10 @@ function h$base_c_s_isfifo(mode) {
 }
 
 #ifndef GHCJS_BROWSER
+// The `fileStat` is filled according to the layout of Emscripten's `stat`
+// struct - defined in stat.h. We must use this layout due to this header
+// file being used for retrieve the offsets for hsc files that peek into
+// memory locations of structs directly.
 function h$base_fillStat(fs, b, off) {
     if(off%4) throw "h$base_fillStat: not aligned";
     var o = off>>2;



View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/6af8bfb5f74751b5692c50ee9263841c79c3bea9

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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/6af8bfb5f74751b5692c50ee9263841c79c3bea9
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