#2945: trace history should not be context/resume specific but global
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Reporter: phercek | Owner:
Type: feature request | Status: new
Priority: normal | Component: GHCi
Version: 6.10.1 | Severity: normal
Keywords: debugger | Testcase:
Os: Unknown/Multiple | Architecture: Unknown/Multiple
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Currently trace history is stored in "Resume" context. I'm not aware of
any good reason for this but it results in problems during debugging. The
point is that one cannot extend currently active trace history using
":trace <varId>" while stopped at breakpoint. The nested trace history is
extended instead. But the nested history is freed when the ":trace
<varId>" command finishes so there is no access to the trace data. This
makes it hard to investigate why the output of the trace command looks the
way it was printed: it is not possible to investigate values of variables
which contributed to the <varId> value.
A discussion about the reasons for global trace history is here:
http://www.haskell.org/pipermail/glasgow-haskell-
users/2009-January/016436.html
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/2945>
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The Glasgow Haskell Compiler
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