[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[rguenth at gcc dot gnu dot org]

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rguenth at gcc dot gnu dot org changed:

   What|Removed |Added

   Severity|normal  |enhancement


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[jakub at gcc dot gnu dot org]

--- Comment #9 from jakub at gcc dot gnu dot org  2010-03-24 11:59 ---
Actually, as the thunks are emitted before .eh_frame, it is much easier.


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jakub at gcc dot gnu dot org changed:

   What|Removed |Added

 AssignedTo|unassigned at gcc dot gnu   |jakub at gcc dot gnu dot org
   |dot org |
 Status|NEW |ASSIGNED
   Last reconfirmed|2010-03-23 19:13:40 |2010-03-24 11:59:53
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[jakub at gcc dot gnu dot org]

--- Comment #10 from jakub at gcc dot gnu dot org  2010-03-24 12:06 ---
Created an attachment (id=20182)
 -- (http://gcc.gnu.org/bugzilla/attachment.cgi?id=20182action=view)
gcc45-pr43498.patch

Patch to emit unwind info for thunks on x86, x86-64 and s390{,x}.
ppc/ppc64, sparc/sparc64 and ia64 (from arches that I care at least a little
bit about) should be outputting unwind info already before this change.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[jakub at gcc dot gnu dot org]

--- Comment #11 from jakub at gcc dot gnu dot org  2010-03-24 20:31 ---
Subject: Bug 43498

Author: jakub
Date: Wed Mar 24 20:31:09 2010
New Revision: 157706

URL: http://gcc.gnu.org/viewcvs?root=gccview=revrev=157706
Log:
PR target/43498
* config/i386/i386.c (x86_output_mi_thunk): Call final_start_function
at the beginning and final_end_function at the end.
* config/s390/s390.c (s390_output_mi_thunk): Likewise.

Modified:
trunk/gcc/ChangeLog
trunk/gcc/config/i386/i386.c
trunk/gcc/config/s390/s390.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[jakub at gcc dot gnu dot org]

--- Comment #12 from jakub at gcc dot gnu dot org  2010-03-24 20:52 ---
Should be fixed.


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jakub at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|ASSIGNED|RESOLVED
 Resolution||FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[pinskia at gcc dot gnu dot org]

--- Comment #7 from pinskia at gcc dot gnu dot org  2010-03-23 19:13 ---
The x86-64 target writes directly out asm rather than going through some RTL
code which causes unwind tables not to be written out for the thunks.


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pinskia at gcc dot gnu dot org changed:

   What|Removed |Added

 Status|UNCONFIRMED |NEW
  Component|middle-end  |target
 Ever Confirmed|0   |1
   Last reconfirmed|-00-00 00:00:00 |2010-03-23 19:13:40
   date||


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498

[Bug target/43498] No unwind info for thunks even with -fasynchronous-unwind-tables

[jakub at gcc dot gnu dot org]

--- Comment #8 from jakub at gcc dot gnu dot org  2010-03-23 22:10 ---
At least when using CFI asm this is solvable easily, see how I've changed i386
PIC setup generation.  Without CFI asm it would be much harder though.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=43498