[Git][ghc/ghc][wip/exception-propagate] Exception rethrowing

[Rodrigo Mesquita (@alt-romes)]

Rodrigo Mesquita pushed to branch wip/exception-propagate at Glasgow Haskell Compiler / GHC


Commits:
978abd66 by Matthew Pickering at 2024-10-02T11:06:08+01:00
Exception rethrowing

Basic changes:

* Change `catch` function to propagate exceptions using the
  WhileHandling mechanism.
* Introduce `catchNoPropagate`, which does the same as before, but
  passes an exception which can be rethrown.
* Introduce `rethrowIO` combinator, which rethrows an exception with a
  context and doesn't add a new backtrace.
* Introduce `tryWithContext` for a variant of `try` which can rethrow
  the exception with it's original context.
* onException is modified to rethrow the original error rather than
  creating a new callstack.
* Functions which rethrow in GHC.Internal.IO.Handle.FD,
  GHC.Internal.IO.Handle.Internals, GHC.Internal.IO.Handle.Text, and
  GHC.Internal.System.IO.Error are modified to not add a new callstack.

Implements CLC proposal#202 <https://github.com/haskell/core-libraries-committee/issues/202>

- - - - -


30 changed files:

- libraries/base/changelog.md
- libraries/base/src/Control/Exception.hs
- libraries/base/tests/IO/T21336/T21336b.stderr
- libraries/base/tests/IO/T4808.stderr
- libraries/base/tests/IO/mkdirExists.stderr
- libraries/base/tests/IO/openFile002.stderr
- libraries/base/tests/IO/openFile002.stderr-mingw32
- libraries/base/tests/IO/withBinaryFile001.stderr
- libraries/base/tests/IO/withBinaryFile002.stderr
- libraries/base/tests/IO/withFile001.stderr
- libraries/base/tests/IO/withFile002.stderr
- libraries/base/tests/IO/withFileBlocking001.stderr
- libraries/base/tests/IO/withFileBlocking002.stderr
- libraries/base/tests/T15349.stderr
- libraries/ghc-internal/src/GHC/Internal/Control/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/Control/Exception/Base.hs
- libraries/ghc-internal/src/GHC/Internal/Exception/Type.hs
- libraries/ghc-internal/src/GHC/Internal/IO.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Exception.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/FD.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Internals.hs
- libraries/ghc-internal/src/GHC/Internal/IO/Handle/Text.hs
- libraries/ghc-internal/src/GHC/Internal/System/IO/Error.hs
- testsuite/tests/codeGen/should_run/cgrun016.stderr
- testsuite/tests/codeGen/should_run/cgrun025.stderr
- testsuite/tests/concurrent/should_run/T3279.hs
- testsuite/tests/ffi/should_run/T7170.stderr
- testsuite/tests/ghc-e/should_fail/T18441fail2.stderr
- testsuite/tests/ghc-e/should_fail/T18441fail7.stderr
- testsuite/tests/ghc-e/should_fail/T18441fail8.stderr


The diff was not included because it is too large.


View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/978abd669b7bdbe816b1239eec5230cbf0855289

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View it on GitLab: https://gitlab.haskell.org/ghc/ghc/-/commit/978abd669b7bdbe816b1239eec5230cbf0855289
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