[Bug general/5724] New: ftrace needs a -all option...

[Bug general/5724] New: ftrace needs a -all option...

[swagiaal at redhat dot com]

...to turn on tracing all syscalls as well as library calls.

also need an option to turn on tracing of all library calls

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           Summary: ftrace needs a -all option...
           Product: frysk
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: general
        AssignedTo: frysk-bugzilla at sourceware dot org
        ReportedBy: swagiaal at redhat dot com
OtherBugsDependingO 5719
             nThis:


http://sourceware.org/bugzilla/show_bug.cgi?id=5724

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[Bug general/5724] ftrace needs a -all option...

[pmachata at redhat dot com]

------- Additional Comments From pmachata at redhat dot com  2008-02-05 08:33 -------
I believe you almost never need to trace every symbol in the application. If the
-all defaulted to syscalls and -plt=@MAIN, i.e. what ltrace does, that I would
probably find useful.  Maybe even -plt=, which is ALL library calls except for
the calls in dynamic linker. But with the way ftrace works (i.e. over ptrace),
that's prohibitively slow as each function call imposes two context switches (to
debugger on SIGTRAP, and back on PTRACE_CONT).  So all in all, I just don't
think that -all would be very useful.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|                            |WONTFIX


http://sourceware.org/bugzilla/show_bug.cgi?id=5724

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