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authorMichael Pratt <mpratt@google.com>2021-09-13 18:07:29 -0400
committerMichael Pratt <mpratt@google.com>2021-09-16 11:20:37 -0400
commitbd296e799bd3eceaa3c3f3db1227f9dba62bb1a1 (patch)
tree94dd1cd89df012d7159b0922e5f2f53914e73e8a /test/syscalls/linux/epoll.cc
parent9bdeddd8826f98251584567b4157c63b297b7825 (diff)
runsc: add global profile collection flags
Add global flags -profile-{block,cpu,heap,mutex} and -trace which enable collection of the specified profile for the entire duration of a container execution. This provides a way to definitively start profiling before that application starts, rather than attempting to race with an out-of-band `runsc debug`. Note that only the main boot process is profiled. This exposed a bug in Task.traceExecEvent: a crash when tracing and -race are enabled. traceExecEvent is called off of the task goroutine, but uses the Task as a context, which is a violation of the Task contract. Switching to the AsyncContext fixes the issue. Fixes #220
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