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author | Simon Marlow <marlowsd@gmail.com> | 2015-10-31 17:38:34 +0000 |
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committer | Simon Marlow <marlowsd@gmail.com> | 2015-12-21 18:51:26 +0000 |
commit | c8c44fd91b509b9eb644c826497ed5268e89363a (patch) | |
tree | 90bc2f24a7886afb8f0036b322f839168c880057 /testsuite/tests/ghci.debugger/scripts/break018.script | |
parent | ee6fba89b066fdf8408e6a18db343a4177e613f6 (diff) | |
download | haskell-c8c44fd91b509b9eb644c826497ed5268e89363a.tar.gz |
Maintain cost-centre stacks in the interpreter
Summary:
Breakpoints become SCCs, so we have detailed call-stack info for
interpreted code. Currently this only works when GHC is compiled with
-prof, but D1562 (Remote GHCi) removes this constraint so that in the
future call stacks will be available without building your own GHCi.
How can you get a stack trace?
* programmatically: GHC.Stack.currentCallStack
* I've added an experimental :where command that shows the stack when
stopped at a breakpoint
* `error` attaches a call stack automatically, although since calls to
`error` are often lifted out to the top level, this is less useful
than it might be (ImplicitParams still works though).
* Later we might attach call stacks to all exceptions
Other related changes in this diff:
* I reduced the number of places that get ticks attached for
breakpoints. In particular there was a breakpoint around the whole
declaration, which was often redundant because it bound no variables.
This reduces clutter in the stack traces and speeds up compilation.
* I tidied up some RealSrcSpan stuff in InteractiveUI, and made a few
other small cleanups
Test Plan: validate
Reviewers: ezyang, bgamari, austin, hvr
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D1595
GHC Trac Issues: #11047
Diffstat (limited to 'testsuite/tests/ghci.debugger/scripts/break018.script')
-rw-r--r-- | testsuite/tests/ghci.debugger/scripts/break018.script | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/testsuite/tests/ghci.debugger/scripts/break018.script b/testsuite/tests/ghci.debugger/scripts/break018.script index 0a4c70ef5a..a30af6bfd1 100644 --- a/testsuite/tests/ghci.debugger/scripts/break018.script +++ b/testsuite/tests/ghci.debugger/scripts/break018.script @@ -1,9 +1,8 @@ -- Check mdo statements: availability of local bindings. --- Maybe we should not want to put in scope the things binded in the mdo scope, to avoid silliness. +-- Maybe we should not want to put in scope the things binded in the mdo scope, to avoid silliness. :set -XRecursiveDo :l ../mdo.hs :st l2dll "hello world" :st :st -:st |