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List:       haiku-bugs
Subject:    [haiku-bugs] Re: [Haiku] #12548: Debugger: implement architectural unwinding of frameless functions 
From:       "anevilyak" <trac () haiku-os ! org>
Date:       2015-12-30 2:50:55
Message-ID: 059.0968378fb8eddf7bb51f8362fcb6ef61 () haiku-os ! org
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#12548: Debugger: implement architectural unwinding of frameless functions
-------------------------------------+----------------------------
   Reporter:  jessicah               |      Owner:  anevilyak
       Type:  enhancement            |     Status:  new
   Priority:  normal                 |  Milestone:  Unscheduled
  Component:  Applications/Debugger  |    Version:  R1/Development
 Resolution:                         |   Keywords:
 Blocked By:                         |   Blocking:
Has a Patch:  0                      |   Platform:  All
-------------------------------------+----------------------------
Changes (by anevilyak):

 * type:  bug =3D> enhancement


Comment:

 Replying to [comment:1 bonefish]:
 > In theory it would be possible to deal more intelligently with frameless
 functions. Debugger could analyze the function to find a code path that
 leads out of the function and thus determine the return address and the
 calling function's stack and frame pointer.

 That's indeed a (long-standing) TODO: http://cgit.haiku-
 os.org/haiku/tree/src/apps/debugger/arch/x86/ArchitectureX86.cpp#n392

 This was one of those issues I've been putting off since it somewhat
 dovetails into handling of code compiled with `-fomit-frame-pointer`; at
 least AFAICT, completely handling the latter correctly would also have the
 side effect of dealing with the frameless case as well, unless I'm missing
 something. Up until now I haven't really had the time to familiarize
 myself enough with x86 assembly to actually implement that though.

--
Ticket URL: <https://dev.haiku-os.org/ticket/12548#comment:2>
Haiku <https://dev.haiku-os.org>
Haiku - the operating system.

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