tree c82bda5f927e44721eb91f721c929e21c2b77edc
parent 333ccf201b267b72631a6794e210cd0031b0101d
author Sasha Goldshtein <goldshtn@gmail.com> 1479042458 -0800
committer Sasha Goldshtein <goldshtn@gmail.com> 1479042458 -0800

trace: Avoid passing -1 as the pid to USDT

When the `-p` switch is used with `trace`, it would set
the tgid to the value passed to `-p` and set the pid to
-1. The result would be incorrect logic that passed the -1
pid value to the `USDT` context constructor, which fails
for probes that require the pid to enable (because they
have a semaphore that needs a poke). This commit fixes it.