Google Inc.

Harshit Chopra

Sunil Chandra

Sanjay Bhansali

Siddaarth Shanmugam

An apparatus and method for aiding in debugging and optimizing software is presented, in particular for instrumenting software to trace function calls. Source code is compiled with placeholder memory ranges. While executing the compiled binary object, a call-trace profiling function is inserted into at least certain of the placeholder memory ranges to log call-trace profiling data. Then, the compiled binary object is restored to its original state by removing the call-trace profiling function(s). A NOP function can be inserted in each placeholder memory range during compilation.

Low-overhead method and apparatus for collecting function call trace data

Methods, systems, and apparatus, including computer program products, for segmenting text for searching are disclosed. In one implementation, a method is provided. The method includes receiving text; segmenting the text into one or more unigrams; filtering the one or more unigrams to identify one or more core unigrams; and generating a searchable resource, including: for each of the one or more core unigrams: identifying a stem, indexing the stem, and associating one or more second n-grams with the indexed stem. Each of the one or more second n-grams is derived from the text and includes a core unigram that is related to the indexed stem.

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Sunnyvale, CA, United States of America

Harshit Chopra