Agent Instrumentation

0.rb

defined?(ModuleToInstrument) && ModuleToInstrument.respond_to?(:method_to_decorate)

1.c

/* internal functions */
wraprec->oldhandler = ((zend_internal_function *) orig_func)->handler;
((zend_internal_function *) orig_func)->handler = wraprec->wrapper;
wraprec->is_wrapped = 1;

/* user functions */
nr_per_process_globals.orig_execute = zend_execute;
zend_execute = nr__execute;

1.cpp

HRESULT Profiler::JITCompilationStarted(FunctionID functionID, BOOL /*fIsSafeToBlock*/)

1.java

public byte[] transform(ClassLoader loader, String className,
			Class<?> classBeingRedefined, ProtectionDomain protectionDomain,
			byte[] classfileBuffer) throws IllegalClassFormatException

1.js

var mthd_without_newrelic_instrumentaiton = shimmer.preserveMethod(Module, 'mthd');
Module.mthd = mthd_with_newrelic_instrumentation;

1.py

mthd_with_newrelic_instrumentation = FunctionTraceWrapper(mthd)
setattr(module, mthd, mthd_with_newrelic_instrumentation)

1.rb

alias_method :mthd_without_newrelic_instrumentation, :mthd
alias_method :mthd, :mthd_with_newrelic_instrumentation

try-finally.rb

# decorative prefix
start = Time.now
begin
  
  # the code under instrumentation

# decorative postfix
ensure
  stop = Time.now
end