/Haskell 8


Copyright (c) The University of Glasgow 2013-2015
License see libraries/base/LICENSE
Maintainer [email protected]
Stability internal
Portability non-portable (GHC Extensions)
Safe Haskell None
Language Haskell2010


This is a module for efficient stack traces. This stack trace implementation is considered low overhead. Basic usage looks like this:

import GHC.ExecutionStack

myFunction :: IO ()
myFunction = do
     putStrLn =<< showStackTrace

Your GHC must have been built with libdw support for this to work.

[email protected]:~$ ghc --info | grep libdw
 ,("RTS expects libdw",YES)

Since: base-

data Location Source

Location information about an address from a backtrace.

data SrcLoc Source

A location in the original program source.



getStackTrace :: IO (Maybe [Location]) Source

Get a trace of the current execution stack state.

Returns Nothing if stack trace support isn't available on host machine.

showStackTrace :: IO (Maybe String) Source

Get a string representation of the current execution stack state.

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).