Fix vm_test_utils.cc on NaCL. Make IsMapped always return true on NaCL to perfetto_test_support to compile there as mincore isn't available on NaCL. R=skyostil@google.com Change-Id: I81ce9e506b21b59af2d9fcf5a2143af6d8b3d068
Perfetto is a production-grade open-source stack for performance instrumentation and trace analysis. It offers services and libraries and for recording system-level and app-level traces, native + java heap profiling, a library for analyzing traces using SQL and a web-based UI to visualize and explore multi-GB traces.
See https://perfetto.dev/docs or the /docs/ directory for documentation.