refactor: Change SentryFrame.function default from <redacted> to nil

[philprime]

📜 Description

Changed SentryFrame.function default value from @"<redacted>" to nil. This aligns the Cocoa SDK with other Sentry SDKs (like Java) and lets the backend handle redaction when function names can't be detected.

💡 Motivation and Context

Fixes #4686

The Cocoa SDK doesn't symbolicate function names locally (it's slow and doesn't work for App Store builds). When the function name is unknown, the SDK should keep it as nil and let the backend apply <redacted> if needed, rather than doing it client-side.

💚 How did you test it?

• Built SDK for iOS and macOS - both builds succeeded
• Ran full test suite on iOS Simulator (iPhone 16 Pro, iOS 18.4) - all tests passed
• Ran full test suite on macOS - all tests passed
• Updated all affected tests to expect nil instead of <redacted>:
  • SentryFrameTests
  • SentryInterfacesTests
  • SentryCrashReportConverterTests
  • SentryCrashStackEntryMapperTests
  • SentryDefaultThreadInspectorTests
  • SentryMetricKitIntegrationTests

📝 Checklist

• I added tests to verify the changes.
• No new PII added or SDK only sends newly added PII if sendDefaultPII is enabled.
• I updated the docs if needed.
• I updated the wizard if needed.
• Review from the native team if needed.
• No breaking change or entry added to the changelog.
• No breaking change for hybrid SDKs or communicated to hybrid SDKs.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 85.499%. Comparing base (0a40a02) to head (8090235).
⚠️ Report is 2 commits behind head on main.
✅ All tests successful. No failed tests found.

Additional details and impacted files

@@              Coverage Diff              @@
##              main     #6608       +/-   ##
=============================================
+ Coverage   85.453%   85.499%   +0.046%     
=============================================
  Files          451       451               
  Lines        27566     27565        -1     
  Branches     12069     12070        +1     
=============================================
+ Hits         23556     23568       +12     
+ Misses        3963      3950       -13     
  Partials        47        47               

Files with missing lines	Coverage Δ
Sources/Sentry/SentryFrame.m	100.000% <100.000%> (ø)

... and 5 files with indirect coverage changes

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[github-actions]

Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1201.06 ms	1251.84 ms	50.78 ms
Size	23.75 KiB	1.01 MiB	1016.03 KiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
e16fd46	1228.64 ms	1251.57 ms	22.93 ms
b6f8eb3	1217.94 ms	1246.57 ms	28.63 ms
be8375a	1212.65 ms	1239.72 ms	27.08 ms
e5773c1	1235.10 ms	1264.15 ms	29.04 ms
119ab1c	1226.79 ms	1254.55 ms	27.76 ms
00d9740	1223.53 ms	1249.75 ms	26.22 ms
daf8077	1202.78 ms	1235.52 ms	32.74 ms
f92cfa9	1217.94 ms	1240.06 ms	22.12 ms
09471ff	1239.98 ms	1256.65 ms	16.67 ms
2609f7a	1218.17 ms	1241.34 ms	23.17 ms

App size

Revision	Plain	With Sentry	Diff
e16fd46	23.74 KiB	1.01 MiB	1008.95 KiB
b6f8eb3	23.75 KiB	988.70 KiB	964.95 KiB
be8375a	23.75 KiB	933.03 KiB	909.28 KiB
e5773c1	23.75 KiB	1.00 MiB	1005.08 KiB
119ab1c	23.75 KiB	993.70 KiB	969.95 KiB
00d9740	23.75 KiB	938.32 KiB	914.57 KiB
daf8077	23.75 KiB	971.82 KiB	948.07 KiB
f92cfa9	23.75 KiB	855.38 KiB	831.63 KiB
09471ff	23.75 KiB	990.16 KiB	966.41 KiB
2609f7a	23.75 KiB	867.04 KiB	843.29 KiB

Previous results on branch: philprime/sentry-frame-function

Startup times

Revision	Plain	With Sentry	Diff
911a661	1219.12 ms	1249.21 ms	30.09 ms
022314d	1228.50 ms	1255.27 ms	26.77 ms

App size

Revision	Plain	With Sentry	Diff
911a661	23.75 KiB	1.02 MiB	1016.53 KiB
022314d	23.75 KiB	1.02 MiB	1016.49 KiB

[philipphofmann]

Thanks, LGTM.

[cursor]

Bug: Reenabled Public `new` Constructor in Frame Class

Removing + (instancetype)new NS_UNAVAILABLE; from SentryFrame.h accidentally re-enables the new class method for SentryFrame. This is an unannounced public API change, unrelated to the PR's main goal, and new was previously explicitly disabled to discourage its use.

Sources/Sentry/Public/SentryFrame.h#L100-L102

sentry-cocoa/Sources/Sentry/Public/SentryFrame.h

Lines 100 to 102 in 8090235

	- (instancetype)init;

 

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