Adaptive instrumentation through dynamic recompilation

A method for dynamically instrumenting application code, the method comprising:

• inserting one or more instrumentation instructions in an application to form an instrumented application;
• (i) executing the instrumented application;
• (ii) detecting a condition during execution of the instrumented application wherein execution one or more instrumented portions of code in the instrumented application are exhibiting excessive performance latency;
• and
• (iii) in response to detecting said condition:
• identifying the one or more instrumented portions of code within the application that that correspond to the detected condition;
• dynamically instrumenting the identified one or more instrumented portions of code during runtime by:
• inserting one or more additional instrumentation instructions in the identified one or more instrumented portions of code;
• and
• conveying a request for recompilation of the identified one or more instrumented portions of code with the additional one or more instrumentation instructions;
• repeating performance of (i), (ii), and (iii) as needed to identify a particular portion of the instrumented portion of the identified one or more instrumented portions of code which is contributing to the excessive performance latency.

A computer readable storage medium comprising program instructions, wherein when executed the program instructions are operable to:

• insert one or more instrumentation instructions in an application to form an instrumented application;
• (i) execute the instrumented application;
• (ii) detect a condition during execution of the instrumented application wherein execution of one or more instrumented portions of code in the instrumented application are exhibiting excessive performance latency;
• and
• (iii) in response to detecting said condition:
• identify the one or more instrumented portions of code within the application that corresponds to the detected condition;
• and
• dynamically instrument the identified one or more instrumented portions of code during runtime by:
• inserting one or more additional instrumentation instructions in the identified one or more instrumented portions of code;
• and
• conveying a request for recompilation of the identified one or more instrumented portions of code with the additional one or more instrumentation instructions;
• wherein the profiler is configured to repeat performance of (i), (ii), and (iii) as needed to identify a particular portion of the identified one or more instrumented portions of code which are contributing to the excessive performance latency.