Reviewers: loislo, Jakob, alph,
Description:
Do not store fp and sp values in TickSample
Their values are not used neither by the tick processor nor by CpuProfiler
so it
is just a waste of space.
TickSample used to be a transport for grabbed register values to
TickSample::Trace, now they are passed in a special structure RegisterState
which is allocated on the stack for the sampling period.
Some common pieces were moved from platform-dependent code into
Sampler::SampleStack and TickSample::Init.
BUG=None
Please review this at https://codereview.chromium.org/18620002/
SVN Base: https://v8.googlecode.com/svn/branches/bleeding_edge
Affected files:
M src/frames.h
M src/frames.cc
M src/log.cc
M src/sampler.h
M src/sampler.cc
M test/cctest/test-log-stack-tracer.cc
M test/mjsunit/tools/tickprocessor-test-func-info.log
M test/mjsunit/tools/tickprocessor-test.log
M tools/tickprocessor.js
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