Safe Haskell	None
Language	Haskell2010

GHC.HeapView.Debug

Description

Utilities to debug GHC.HeapView.

Synopsis

walkHeap :: Bool -> Bool -> Box -> IO ()
walkPrefix :: [Int] -> a -> IO Box
findM :: (a -> IO Bool) -> [a] -> IO (Maybe a)
isCharCons :: GenClosure Box -> IO Bool
isCons :: GenClosure b -> Maybe (b, b)
isChar :: GenClosure b -> Maybe Char

Documentation

walkHeap Source #

Arguments

:: Bool	Whether to check for cycles
-> Bool	Whether to GC in every step
-> Box	The closure to investigate
-> IO ()

This function walks the heap referenced by the argument, printing the "path", i.e. the pointer indices from the initial to the current closure and the closure itself. When the runtime crashes, the problem is likely related to one of the earlier steps.

walkPrefix :: [Int] -> a -> IO Box Source #

findM :: (a -> IO Bool) -> [a] -> IO (Maybe a) Source #

isCharCons :: GenClosure Box -> IO Bool Source #

isCons :: GenClosure b -> Maybe (b, b) Source #

isChar :: GenClosure b -> Maybe Char Source #