Hi all,
I'm using dtrace (SunOS 5.10 Generic_142900-03 sun4v sparc) to track the
ustack of certain troublesome function calls, but leaf functions which
don't have a stack frame of their own are causing problems.
For example, dtrace's ustack() might report the following:
a.out`frameless_leaf+0x10
a.out`random_function+0x9c
...when in fact random_function+0x9c is actually a call to
some_other_function. Printing the stack trace from dbx shows what's
really going on:
[1] frameless_leaf()
[2] true_caller()
[3] some_other_function()
[4] random_function()
I tried uaddr(uregs[R_O7]), but it may point to some_other_function
rather than true_caller, or complete garbage for other stack frames.
Is this a known limitation/bug? For now I'm using the O7 trick and
post-processing to remove the most glaring deficiencies but a real
solution would be nice.
Regards,
Ryan
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