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TEST&COVERAGE 21 NEW FEATURES LIST
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Copyright (C) 2026, AdaCore

This file contains a complete list of new features in version 21 of the
Test&Coverage technology. A full description of all features can be found in
the accompanying documentation.

An ISO date (YYYY-MM-DD) appears in parentheses after the description line.
This date shows the implementation date of the feature. Any 21.0w wavefront
subsequent to this date will contain the indicated feature, as will any
subsequent 21 or later release.

NF-TC14-013 Detect GNATcoverage and GNATcov_rts incompatibility (2020-12-16)

  The GNATcoverage instrumentation and coverage runtime were
  improved to detect incompatibilities between instrumented code and
  the runtime with which it was linked. This might occur when a
  program was instrumented using a different GNATcoverage
  distribution than the one from which the installed coverage
  runtime was taken.

NF-T909-026 Improved detection of incompatible trace kinds (2021-05-20)

  Gnatcov now rejects mixing traces of different kinds (source
  traces vs. binary traces) and emits warnings when using options
  only applicable for another trace kind (for instance, using --scos
  with source traces, or using --sid with binary traces).

NF-T611-027 New gnatcov option: --dump-units-to (2020-07-01)

  The "gnatcov coverage" command has a new command-line option
  available: --dump-units-to allows one to get the list of units of
  interest considered when generating the coverage report.

NF-SB20-006 Trace32 branchflow conversion recovery (2019-11-26)

  Trace32 branchflow conversion can now handle cases that would
  previously stop the conversion with an error:
    - Trace entries outside of the ELF binary text section.
    - Trace entries in the middle of a basic block (usually
      interrupt/trap).

NF-SA30-020 Set exit status in separate test drivers (2019-10-30)

  Gnattest now forces individual test drivers generated in --stub or
  --separate-drivers mode to set exit status when --exit-status=on
  is passed.

NF-S913-031 Global setup and teardown (2019-10-11)

  Gnattest now provides a way to set up and tear down global test
  environment.

NF-P425-025 Performance enhancement for "gnatcov coverage" (2019-12-09)

  "gnatcov coverage" has been optimized and now runs faster. These
  improvements benefit all binary trace files processing, and the
  biggest one comes from removing redundant work when processing
  multiple trace files that relate to the same executable.