[Bug translator/10762] New: turn off userspace prologue heuristics for recent gcc

["fche at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

We currently force on prologue searching for userspace process
files, since widespread gcc produces poor dwarf data to locate
incoming $$parms.

If we can detect (or have a user assert) that modern (vta-based)
debuginfo is available for a given ELF file, we should disable
the heuristics.  If automatic means are unavailable, perhaps another
command line option like "-P" would be needed, or (yikes) a probe
point syntax extension.

One reason for this is that an instruction somewhat below
the prologue is more likely to be within a loop, which could
result in false "entry" probe hits at every iteration.

-- 
           Summary: turn off userspace prologue heuristics for recent gcc
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: normal
          Priority: P2
         Component: translator
        AssignedTo: systemtap at sources dot redhat dot com
        ReportedBy: fche at redhat dot com


http://sourceware.org/bugzilla/show_bug.cgi?id=10762

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