tree 5c737d374f355d9493e8b0f446c112eb6674bec3
parent 1b3b271e7a17b92b82a59f8bd673be03a6501b81
author Lalit Maganti <lalitm@google.com> 1542036258 +0000
committer Lalit Maganti <lalitm@google.com> 1542036258 +0000

traced_probes: capture stderr from atrace

This changes adds the plumbing to capture the output of atrace's stderr.
It does this by creating a pipe, changing the fd of atrace's stderr to
point to this pipe and then reading the data from this pipe on the
parent process.

Currently, nothing is done with this data but we will eventually define
an error packet and surface this info in the trace.

Bug: 118760951
Change-Id: I41196ed468d70440a76f59ad08382f2079e66ce9