tree 9f246104c9c1192d21c536f20346692b9b9f2a62
parent 54280d3ec8f16f8f9eb2e086365ee7b4c3fe20cb
author Eric Seckler <eseckler@google.com> 1579182253 +0000
committer Eric Seckler <eseckler@google.com> 1579182253 +0000

processor: Translate duplicate pids/tids during json export

The old trace viewer / TBMv2 can't handle it when there are multiple
"main" threads in the same process. It doesn't have the concept of
"pid/tid reuse", i.e. unique pids/tids, like trace processor.

Instead, we have to detect duplicate pids/tids when we export to json
and translate them to unique substitute values instead. This patch does
this by choosing unused values at the upper end of the uint32 space.

This patch also refactors ExportJson to use a helper object
(JsonExporter) to store some state.

Also updates thread/process name parsing in TrackEventParser to not set
thread/process names from UNSPECIFIED chrome types.

Bug: 130786269
Change-Id: I4b6ac5c7b892604e3fd4d3415bd239bd507df0fc