WIP: feat: WER integration

[jpnurmi]

The WER (Windows Error Reporting) integration:

• enabled via cmake -DSENTRY_INTEGRATION_WER=ON (inspired by the existing Qt integration)
• automatically wired up during sentry_init
• based on the scope observer API (sentry_scope_observer_t, also WIP)
• syncs tags and attachments to WER
  • WerRegisterCustomMetadata / WerUnregisterCustomMetadata (Windows 10 1703+)
  • WerRegisterFile / WerUnregisterFile
  • WerRegisterMemoryBlock / WerUnregisterMemoryBlock

The implementation is backend-agnostic, but does not work with breakpad or crashpad, which prevent WER from handling the exception.

> pytest -v --with_wer tests\test_integration_wer.py
=================================================================== test session starts ====================================================================
platform win32 -- Python 3.13.3, pytest-9.0.3, pluggy-1.6.0 -- C:\Users\jpnurmi\Projects\sentry\sentry-native\.venv\Scripts\python.exe
cachedir: .pytest_cache
rootdir: C:\Users\jpnurmi\Projects\sentry\sentry-native
plugins: flaky-3.8.1, pytest_httpserver-1.0.10, xdist-3.8.0
collected 5 items

tests/test_integration_wer.py::test_wer_custom_metadata[none] PASSED                                                                                  [ 20%]
tests/test_integration_wer.py::test_wer_custom_metadata[inproc] PASSED                                                                                [ 40%]
tests/test_integration_wer.py::test_wer_custom_metadata[breakpad] XFAIL (breakpad swallows the exception)                                             [ 60%]
tests/test_integration_wer.py::test_wer_custom_metadata[crashpad] XFAIL (crashpad handler terminates the process)                                     [ 80%]
tests/test_integration_wer.py::test_wer_custom_metadata[native] PASSED                                                                                [100%]

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Cursor Bugbot has reviewed your changes and found 1 potential issue.

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[cursor]

Cleanup uses strlen on tag keys

Low Severity

wer_cleanup_tag passes strlen(key) into wer_remove_tag during shutdown cleanup, while tag set/remove paths use explicit key_len from sentry_set_tag_n / sentry_remove_tag_n. Keys stored with embedded NUL bytes can unregister under the wrong WER metadata name.

 

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