[lldb-dev] [Bug 20149] New: No configuration settings available for stop line printing within an IDE

bugzilla-daemon at llvm.org bugzilla-daemon at llvm.org
Fri Jun 27 16:37:51 PDT 2014


            Bug ID: 20149
           Summary: No configuration settings available for stop line
                    printing within an IDE
           Product: lldb
           Version: unspecified
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: All Bugs
          Assignee: lldb-dev at cs.uiuc.edu
          Reporter: rdsmith at chromium.org
    Classification: Unclassified

[lldb built from source at svn revision 210882.]

lldb's current behavior is to print source lines from a source file if source
line information is present and valid and either stop-line-count-before or
stop-line-count-after is non-zero.  If that condition is not true, assembly
language lines are printed instead.  (StackFrame::GetStatus()).  If you want
lldb not to display anything on frames corresponding to source lines, you need
to turn off disassembly display as well.

I would argue that this doesn't make sense for contexts in which lldb is being
run within and on behalf of an IDE (my personal use case is in GUD mode in
emacs, but the argument is general).  In such cases, since the IDE probably has
an integrated editor, it will be responsible for displaying the source, and
just wants lldb to tell it what to display (taken care of by the "frame
#n:<blah> at FILE:LINENO").  However, the IDE is unlikely to be able to display
the assembly on its own, so it doesn't want to disable display of the assembly

Proposed fix is to make the setting of have_source in StackFrame::GetStatus()
be independent of the settings of the line display count, and only have the
actual display of the lines be dependent on those counts. 

If no one objects, I'm happy to put together a patch (though it doesn't look
like I can assign this bug to myself).

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