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| author | Ben Gamari <bgamari.foss@gmail.com> | 2017-02-07 22:56:36 -0500 |
|---|---|---|
| committer | Ben Gamari <ben@smart-cactus.org> | 2017-02-08 10:26:00 -0500 |
| commit | 3328ddb88b6eb11cb1f6e844f883e7e9d2b8f21b (patch) | |
| tree | 3bb04ff1f086a95e8f93041d13a10af7ec1f9011 /rts/StgMiscClosures.cmm | |
| parent | 733e845d0f66541a06415c6b420e51fc99eb9d95 (diff) | |
| download | haskell-3328ddb88b6eb11cb1f6e844f883e7e9d2b8f21b.tar.gz | |
Cmm: Add support for undefined unwinding statements
And use to mark `stg_stack_underflow_frame`, which we are unable to
determine a caller from.
To simplify parsing at the moment we steal the `return` keyword to
indicate an undefined unwind value. Perhaps this should be revisited.
Reviewers: scpmw, simonmar, austin, erikd
Subscribers: dfeuer, thomie
Differential Revision: https://phabricator.haskell.org/D2738
Diffstat (limited to 'rts/StgMiscClosures.cmm')
| -rw-r--r-- | rts/StgMiscClosures.cmm | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/rts/StgMiscClosures.cmm b/rts/StgMiscClosures.cmm index e8a5b8fed5..88371f2109 100644 --- a/rts/StgMiscClosures.cmm +++ b/rts/StgMiscClosures.cmm @@ -26,6 +26,8 @@ INFO_TABLE_RET (stg_stack_underflow_frame, UNDERFLOW_FRAME, W_ info_ptr, P_ unused) /* no args => explicit stack */ { + unwind UnwindReturnReg = return; + W_ new_tso; W_ ret_off; |