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| author | Matthew Pickering <matthewtpickering@gmail.com> | 2020-11-23 10:30:57 +0000 |
|---|---|---|
| committer | Matthew Pickering <matthewtpickering@gmail.com> | 2021-03-03 19:11:06 +0000 |
| commit | 91d09039a8d6665097c1aa12f6fb3e6e45d4acca (patch) | |
| tree | f27c46a539d6af2e1c9da3e064fd210e0f9cb7ca /docs | |
| parent | db80a5cc239d7d2a9c6f5259a782b99f8a4d8e41 (diff) | |
| download | haskell-91d09039a8d6665097c1aa12f6fb3e6e45d4acca.tar.gz | |
Add release notes for -hi, -finfo-table-map and -fdistinct-constructor-tables
Diffstat (limited to 'docs')
| -rw-r--r-- | docs/users_guide/9.2.1-notes.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/docs/users_guide/9.2.1-notes.rst b/docs/users_guide/9.2.1-notes.rst index 2630ae91fe..c590a89d31 100644 --- a/docs/users_guide/9.2.1-notes.rst +++ b/docs/users_guide/9.2.1-notes.rst @@ -99,6 +99,12 @@ Compiler There is a new RTS flag :rts-flag:`--no-automatic-heap-samples` which can be used to stop heap profiling starting when a program starts. +- A new debugging facility, :ghc-flag:`-finfo-table-map`, which embeds a mapping + from the address of an info table to information about that info table, including + an approximate source position. :ghc-flag:`-fdistinct-constructor-tables` is + also useful with this flag to give each usage of a data constructor its own + unique info table so they can be distinguished in gdb and heap profiles. + GHCi ~~~~ @@ -126,6 +132,14 @@ Runtime system included in heap profiles. Tooling can choose to filter out these closure types ` if necessary. +- A new heap profiling mode, :rts-flag:`-hi`, profile by info table allows for + fine-grain banding by the info table address of a closure. The profiling + mode is intended to be used with :ghc-flag:`-finfo-table-map` and can best + be consumed with ``eventlog2html``. This profiling mode does not require a + profiling build. + +``ghc-prim`` library +~~~~~~~~~~~~~~~~~~~~ - ``Void#`` is now a type synonym for the unboxed tuple ``(# #)``. Code using ``Void#`` now has to enable :extension:`UnboxedTuples`. |