Writing to trace_clock erases the trace buffer, even if the value
hasn't changed. This prevents use of --async_start and --async_dump
to leave background tracing running and dump after an even that
needs debugging, because --async_dump writes to trace_clock and
resets the buffer before it can read it.
Read and parse the current value from trace_clock before writing,
and skip the write if the value isn't changing.
Change-Id: Ia2ec5bb654fb0bd179771b511ff261731ba47dca
This change adds support for the -a command line argument to atrace. This
argument sets the comma separated list of application names (i.e.
/proc/self/cmdline values) for which to enable application-level tracing.
Change-Id: I812d57c4cdc581943247229413f09b7e1adc10d0
This change adds support for tracing specific kernel function calls using the
function_graph tracer. It adds a '-k' option to atrace that accepts a comma
separated list of kernel function names for which tracing will be enabled.
Change-Id: I872b2f1d474b8ebb904053853fc8cf8c0a98089c
This change switches atrace to use a table-driven approach to enabling and
disabling options. It unifies how framework and kernel tracing are enabled,
and causes userland tracing options to be picked up by currently running
processes.
Change-Id: Iba2a3012ca0a67c4defdd076bce597db26e9f539
