[jit] Implement ScriptProfile to collect instruction profiles. (#57397)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/57397
Introduces two main classes in C++ runtime:
ScriptProfile is the implementation for enalbing and disabling interpreter
profiling in C++. This should be only used from Python, and we will add
corresponding Python API in the next diff.
InstructionSpan is a utility class to instrument execution of each single
instruction. A start timestamp is recorded in the consturctor, and an end
timestamp is recorded in the destructor. During destruction, this will send
runtime data to all enabled ScriptProfile instances.
Test Plan:
build/bin/test_jit --gtest_filter='ScriptProfileTest.Basic'
Imported from OSS
Reviewed By: gmagogsfm
Differential Revision: D28133579
fbshipit-source-id: e7e30e96151367022793ab3ad323f01c51ad4a3b
