refactor: native FFI for Android and Cocoa SDK

[vaind]

📜 Description

This is an evaluation/PoC for integration of the iOS/macOS (a.k.a. Cocoa) SDK as well as Android (Java) SDK via direct FFI invocation, avoiding method channels.

Tracking issue: #1444

Currently, this PR only ads the configuration & code generated to make the necessary change & I've tested a full call roundtrip for both SDKs.

💡 Motivation and Context

💚 How did you test it?

📝 Checklist

• I reviewed submitted code
• I added tests to verify changes
• No new PII added or SDK only sends newly added PII if sendDefaultPii is enabled
• I updated the docs if needed
• All tests passing
• No breaking changes

🔮 Next steps

Decide whether we want to go ahead and implement this fully - replacing the functionality currently implemented in platform-specific method channels.

[github-actions]

Android Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	346.02 ms	421.12 ms	75.10 ms
Size	6.16 MiB	7.18 MiB	1.02 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
fcd1ee4	298.96 ms	376.04 ms	77.09 ms
870f5eb	329.45 ms	369.29 ms	39.84 ms
fe4aa56	356.06 ms	428.67 ms	72.61 ms
0db91cc	327.85 ms	387.31 ms	59.46 ms
7ade5af	341.04 ms	386.84 ms	45.80 ms
d7758e8	300.12 ms	349.88 ms	49.76 ms
457a85b	312.37 ms	376.67 ms	64.31 ms
bf4aed7	311.24 ms	365.66 ms	54.42 ms
b728df4	390.98 ms	445.81 ms	54.83 ms
f2db4ec	372.46 ms	469.72 ms	97.26 ms

App size

Revision	Plain	With Sentry	Diff
fcd1ee4	6.16 MiB	7.13 MiB	1000.85 KiB
870f5eb	5.94 MiB	6.92 MiB	1005.77 KiB
fe4aa56	6.06 MiB	7.10 MiB	1.04 MiB
0db91cc	5.94 MiB	6.95 MiB	1.01 MiB
7ade5af	5.94 MiB	6.95 MiB	1.01 MiB
d7758e8	5.94 MiB	6.95 MiB	1.01 MiB
457a85b	6.06 MiB	7.09 MiB	1.03 MiB
bf4aed7	6.06 MiB	7.03 MiB	997.04 KiB
b728df4	5.94 MiB	6.95 MiB	1.01 MiB
f2db4ec	6.06 MiB	7.03 MiB	990.27 KiB

Previous results on branch: refactor/native-ffi

Startup times

Revision	Plain	With Sentry	Diff
84d609c	339.49 ms	409.26 ms	69.77 ms

App size

Revision	Plain	With Sentry	Diff
84d609c	6.16 MiB	7.18 MiB	1.02 MiB

[github-actions]

	Fails
🚫	Please consider adding a changelog entry for the next release.

Instructions and example for changelog

Please add an entry to CHANGELOG.md to the "Unreleased" section. Make sure the entry includes this PR's number.

Example:

## Unreleased

- native FFI for Android and Cocoa SDK ([#1622](https://github.com/getsentry/sentry-dart/pull/1622))

If none of the above apply, you can opt out of this check by adding #skip-changelog to the PR description.

Generated by 🚫 dangerJS against ae34a42

[github-actions]

iOS Performance metrics 🚀

	Plain	With Sentry	Diff
Startup time	1245.24 ms	1247.15 ms	1.91 ms
Size	8.29 MiB	9.38 MiB	1.09 MiB

Baseline results on branch: main

Startup times

Revision	Plain	With Sentry	Diff
211a7aa	1258.02 ms	1275.65 ms	17.63 ms
f0fcbe1	1238.08 ms	1243.44 ms	5.36 ms
55cc6ef	1271.92 ms	1281.04 ms	9.12 ms
ddc97ad	1228.02 ms	1232.61 ms	4.59 ms
6aab859	1245.14 ms	1247.59 ms	2.45 ms
e893df5	1247.90 ms	1262.31 ms	14.41 ms
6572f8d	1242.16 ms	1246.63 ms	4.47 ms
6d7a391	1265.65 ms	1289.98 ms	24.33 ms
56810ff	1267.59 ms	1293.48 ms	25.89 ms
1e781fc	1257.96 ms	1281.49 ms	23.53 ms

App size

Revision	Plain	With Sentry	Diff
211a7aa	8.10 MiB	9.18 MiB	1.08 MiB
f0fcbe1	8.29 MiB	9.38 MiB	1.09 MiB
55cc6ef	8.10 MiB	9.18 MiB	1.08 MiB
ddc97ad	8.29 MiB	9.37 MiB	1.08 MiB
6aab859	8.29 MiB	9.36 MiB	1.07 MiB
e893df5	8.09 MiB	9.07 MiB	1001.04 KiB
6572f8d	8.29 MiB	9.36 MiB	1.07 MiB
6d7a391	8.16 MiB	9.16 MiB	1.01 MiB
56810ff	8.15 MiB	9.12 MiB	987.35 KiB
1e781fc	8.10 MiB	9.18 MiB	1.08 MiB

Previous results on branch: refactor/native-ffi

Startup times

Revision	Plain	With Sentry	Diff
84d609c	1229.24 ms	1234.31 ms	5.07 ms

App size

Revision	Plain	With Sentry	Diff
84d609c	8.29 MiB	9.38 MiB	1.09 MiB

[codecov]

Codecov Report

Patch has no changes to coverable lines.

❗ Current head ae34a42 differs from pull request most recent head 8367da2. Consider uploading reports for the commit 8367da2 to get more accurate results

Files Changed	Coverage
...r/lib/src/integrations/native_sdk_integration.dart	ø

📢 Thoughts on this report? Let us know!.

[getsantry]

This issue has gone three weeks without activity. In another week, I will close it.

But! If you comment or otherwise update it, I will reset the clock, and if you remove the label Waiting for: Community, I will leave it alone ... forever!

---

"A weed is but an unloved flower." ― Ella Wheeler Wilcox 🥀

[vaind]

closing because

• cocoa FFI has already been in use for profiling for a while
• java FFI is coming for replay in another PR