Runtime crash due to `-prof -forig-thunk-info`

$ cat hi2.hs
main = putStrLn "hi"
$ ghc hi2.hs -prof -forig-thunk-info
$ ./hi2
Segmentation fault (core dumped)

added needs triage label

changed the description

The problem appears to be that the frame size fails to account for the profiling header.

The following should fix this:

diff --git a/rts/StgMiscClosures.cmm b/rts/StgMiscClosures.cmm
index 80dc84692c5..d9546940c6c 100644
--- a/rts/StgMiscClosures.cmm
+++ b/rts/StgMiscClosures.cmm
@@ -51,8 +51,8 @@ INFO_TABLE_RET (stg_orig_thunk_info_frame, RET_SMALL,
                 W_ thunk_info_ptr)
     /* no args => explicit stack */
 {
-    unwind Sp = W_[Sp + WDS(2)];
-    Sp_adj(2);
+    unwind Sp = W_[Sp + SIZEOF_StgOrigThunkInfoFrame];
+    Sp = Sp + SIZEOF_StgOrigThunkInfoFrame;
     jump %ENTRY_CODE(Sp(0)) [*]; // NB. all registers live!
 }

assigned to @bgamari

removed needs triage label

added Phigh RTS Tbug labels

mentioned in commit 0390ab7a

mentioned in merge request !12621 (closed)

mentioned in commit f60104ad

closed with commit 6d7e6ad8

mentioned in commit 6d7e6ad8

marked #24873 (closed) as a duplicate of this issue

marked this issue as related to #24873 (closed)

mentioned in commit 4acf252e

mentioned in commit 2da93f8e

mentioned in commit 6d00956c