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| author | Simon Marlow <marlowsd@gmail.com> | 2015-10-31 17:38:34 +0000 |
|---|---|---|
| committer | Simon Marlow <marlowsd@gmail.com> | 2015-12-21 18:51:26 +0000 |
| commit | c8c44fd91b509b9eb644c826497ed5268e89363a (patch) | |
| tree | 90bc2f24a7886afb8f0036b322f839168c880057 /rts/RtsSymbols.c | |
| 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 'rts/RtsSymbols.c')
| -rw-r--r-- | rts/RtsSymbols.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rts/RtsSymbols.c b/rts/RtsSymbols.c index 4b0a1d5b60..ffb5c39100 100644 --- a/rts/RtsSymbols.c +++ b/rts/RtsSymbols.c @@ -670,6 +670,7 @@ SymI_HasProto(stg_restore_cccs_info) \ SymI_HasProto(enterFunCCS) \ SymI_HasProto(pushCostCentre) \ + SymI_HasProto(mkCostCentre) \ SymI_HasProto(era) #else #define RTS_PROF_SYMBOLS /* empty */ @@ -731,6 +732,7 @@ SymI_HasProto(stg_catchRetryzh) \ SymI_HasProto(stg_catchSTMzh) \ SymI_HasProto(stg_checkzh) \ + SymI_HasProto(stg_clearCCSzh) \ SymI_HasProto(closure_flags) \ SymI_HasProto(cmp_thread) \ SymI_HasProto(createAdjustor) \ |