• Keith Randall's avatar
    runtime: store incremented PC in result of runtime.Callers · 232c9793
    Keith Randall authored
    In 1.11 we stored "return addresses" in the result of runtime.Callers.
    I changed that behavior in CL 152537 to store an address in the call
    instruction itself. This CL reverts that part of 152537.
    
    The change in 152537 was made because we now store pcs of inline marks
    in the result of runtime.Callers as well. This CL will now store the
    address of the inline mark + 1 in the results of runtime.Callers, so
    that the subsequent -1 done in CallersFrames will pick out the correct
    inline mark instruction.
    
    This CL means that the results of runtime.Callers can be passed to
    runtime.FuncForPC as they were before. There are a bunch of packages
    in the wild that take the results of runtime.Callers, subtract 1, and
    then call FuncForPC. This CL keeps that pattern working as it did in
    1.11.
    
    The changes to runtime/pprof in this CL are exactly a revert of the
    changes to that package in 152537 (except the locForPC comment).
    
    Update #29582
    
    Change-Id: I04d232000fb482f0f0ff6277f8d7b9c72e97eb48
    Reviewed-on: https://go-review.googlesource.com/c/156657Reviewed-by: 's avatarIan Lance Taylor <iant@golang.org>
    Run-TryBot: Ian Lance Taylor <iant@golang.org>
    TryBot-Result: Gobot Gobot <gobot@golang.org>
    232c9793
traceback.go 44.1 KB