[commit: ghc] ghc-8.6: Remove explicit recursion in retainer profiling (fixes #14758) (6db7d11)

[git at git.haskell.org]

Repository : ssh://git@git.haskell.org/ghc

On branch  : ghc-8.6
Link       : http://ghc.haskell.org/trac/ghc/changeset/6db7d11eed70b4db7b7698a9dfae94a6abae248a/ghc

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commit 6db7d11eed70b4db7b7698a9dfae94a6abae248a
Author: Alexander Vershilov <alexander.vershilov at gmail.com>
Date:   Wed Dec 5 19:47:32 2018 +0300

    Remove explicit recursion in retainer profiling (fixes #14758)
    
    Retainer profiling contained a recursion that under
    certain circumstances could lead to the stack overflow
    in C code.
    
    The idea of the improvement is to keep an explicit stack for the
    object, more precise to reuse existing stack, but allow new type of
    objects to be stored there.
    
    There is no reliable reproducer that is not a big program
    but in some cases foldr (+) 0 [1..10000000] can work.
    
    Reviewers: bgamari, simonmar, erikd, osa1
    
    Reviewed By: bgamari, osa1
    
    Subscribers: osa1, rwbarton, carter
    
    GHC Trac Issues: #14758
    
    Differential Revision: https://phabricator.haskell.org/D5351
    
    (cherry picked from commit 5f1d949ab9e09b8d95319633854b7959df06eb58)


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6db7d11eed70b4db7b7698a9dfae94a6abae248a
 rts/RetainerProfile.c | 223 +++++++++++++++++++++++++++++++++-----------------
 1 file changed, 146 insertions(+), 77 deletions(-)

Diff suppressed because of size. To see it, use:

    git diff-tree --root --patch-with-stat --no-color --find-copies-harder --ignore-space-at-eol --cc 6db7d11eed70b4db7b7698a9dfae94a6abae248a