[GHC] #11100: Remote GHCi

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#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: new Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Wiki Page: | Phab:D1562,Phab:D1747,Phab:D1748 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"6be09e884730f19da6c24fc565980f515300e53c/ghc" 6be09e8/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="6be09e884730f19da6c24fc565980f515300e53c" Enable stack traces with ghci -fexternal-interpreter -prof Summary: The main goal here is enable stack traces in GHCi. After this change, if you start GHCi like this: ghci -fexternal-interpreter -prof (which requires packages to be built for profiling, but not GHC itself) then the interpreter manages cost-centre stacks during execution and can produce a stack trace on request. Call locations are available for all interpreted code, and any compiled code that was built with the `-fprof-auto` familiy of flags. There are a couple of ways to get a stack trace: * `error`/`undefined` automatically get one attached * `Debug.Trace.traceStack` can be used anywhere, and prints the current stack Because the interpreter is running in a separate process, only the interpreted code is running in profiled mode and the compiler itself isn't slowed down by profiling. The GHCi debugger still doesn't work with -fexternal-interpreter, although this patch gets it a step closer. Most of the functionality of breakpoints is implemented, but the runtime value introspection is still not supported. Along the way I also did some refactoring and added type arguments to the various remote pointer types in `GHCi.RemotePtr`, so there's better type safety and documentation in the bridge code between GHC and ghc-iserv. Test Plan: validate Reviewers: bgamari, ezyang, austin, hvr, goldfire, erikd Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1747 GHC Trac Issues: #11047, #11100 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:6 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

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#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: new Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Phab:D1562 Wiki Page: | Phab:D1747 Phab:D1748 Phab:D1836 -------------------------------------+------------------------------------- Comment (by Ben Gamari ): In [changeset:"44a5d51a4892b85c7eba09dcb90ca02245637812/ghc" 44a5d51a/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="44a5d51a4892b85c7eba09dcb90ca02245637812" Enable RemoteGHCi on Windows Makes the needed changes to make RemoteGHCi work on Windows. The approach passes OS Handles areound instead of the Posix Fd as on Linux. The reason is that I could not find any real documentation about the behaviour of Windows w.r.t inheritance and Posix FDs. The implementation with Fd did not seem to be able to find the Fd in the child process. Instead I'm using the much better documented approach of passing inheriting handles. This requires a small modification to the `process` library. https://github.com/haskell/process/pull/52 Test Plan: ./validate On Windows x86_64 Reviewers: thomie, erikd, bgamari, simonmar, austin, hvr Reviewed By: simonmar Subscribers: #ghc_windows_task_force Differential Revision: https://phabricator.haskell.org/D1836 GHC Trac Issues: #11100 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:16 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

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4:53 a.m.

#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: merge Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Phab:D1562 Wiki Page: | Phab:D1747 Phab:D1748 Phab:D1836 -------------------------------------+------------------------------------- Changes (by bgamari): * status: new => merge -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:17 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

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7:10 a.m.

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2 Feb 2 Feb

3:21 a.m.

#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: closed Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Phab:D1562 Wiki Page: | Phab:D1747 Phab:D1748 Phab:D1836 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"2fb6a8c30567e7d071ffcf88e22ea7f72f60b826/ghc" 2fb6a8c/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="2fb6a8c30567e7d071ffcf88e22ea7f72f60b826" Remote GHCi: Optimize the serialization/deserialization of byte code Summary: This cuts allocations by about a quarter. Test Plan: * validate * `ghci -fexternal-interpreter` in `nofib/real/anna` Reviewers: niteria, bgamari, ezyang, austin, hvr, erikd Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1875 GHC Trac Issues: #11100 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:19 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

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3:21 a.m.

#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: closed Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Phab:D1562 Wiki Page: | Phab:D1747 Phab:D1748 Phab:D1836 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"7cb1fae2d6ec90b10708a2631cd1069561177bd4/ghc" 7cb1fae2/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="7cb1fae2d6ec90b10708a2631cd1069561177bd4" Remote GHCi: batch the creation of strings Summary: This makes a big performance difference especially when loading a large number of modules and using parallel compilation (ghci -jN). Test Plan: * validate * `ghci -fexternal-interpreter` in `nofib/real/anna` Reviewers: niteria, bgamari, ezyang, austin, hvr, erikd Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1876 GHC Trac Issues: #11100 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:20 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

GHC

3:21 a.m.

#11100: Remote GHCi -------------------------------------+------------------------------------- Reporter: simonmar | Owner: simonmar Type: task | Status: closed Priority: normal | Milestone: 8.0.1 Component: GHCi | Version: 7.10.2 Resolution: fixed | Keywords: Operating System: Unknown/Multiple | Architecture: | Unknown/Multiple Type of failure: None/Unknown | Test Case: Blocked By: | Blocking: Related Tickets: #11047, #8736 | Differential Rev(s): Phab:D1562 Wiki Page: | Phab:D1747 Phab:D1748 Phab:D1836 -------------------------------------+------------------------------------- Comment (by Simon Marlow ): In [changeset:"c996db5b1802ebeb93420785127f7fd55b7ec0c0/ghc" c996db5/ghc]: {{{ #!CommitTicketReference repository="ghc" revision="c996db5b1802ebeb93420785127f7fd55b7ec0c0" Remote GHCi: parallelise BCO serialization Summary: Serialization of BCOs is slow, but we can parallelise it when using ghci -j<n>. It parallelises nicely, saving multiple seconds off the link time in a large example I have. Test Plan: * validate * `ghci -fexternal-interpreter` in `nofib/real/anna` Reviewers: niteria, bgamari, ezyang, austin, hvr, erikd Subscribers: thomie Differential Revision: https://phabricator.haskell.org/D1877 GHC Trac Issues: #11100 }}} -- Ticket URL: http://ghc.haskell.org/trac/ghc/ticket/11100#comment:21 GHC http://www.haskell.org/ghc/ The Glasgow Haskell Compiler

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