Write some release notes.

Author: mstange

RELEASES.md

@@ -4,6 +4,44 @@
 
 ## Unreleased - ReleaseDate
 
+This release adds Windows support. It uses ETW via `xperf` to record the system activity to an ETL file. Then samply converts the ETL file.
+
+Samply asks for Adminstrator privileges during profiling. This is necessary for ETW to work.
+
+Thanks to @jrmuizel for getting this off the ground. Most of the Windows implementation was initially written by him. ETW is rather lightly documented, so this required a lot of research.
+
+Also thanks to @vvuk, who integrated Jeff's code into samply and contributed hugely to getting this ready for production!
+
+And thanks to the authors of the https://github.com/n4r1b/ferrisetw crate; samply uses etw-reader which started out as a fork of ferrisetw.
+
+Known issues:
+
+ - By default, you won't get Windows symbols, but you can use `samply record --windows-symbol-server https://msdl.microsoft.com/download/symbols` to fix this - this will download symbols for Windows system libraries and kernel stacks from Microsoft's server. I'm planning to add a config file for samply so that symbol servers can be configured more permanently, but it doesn't exist yet.
+ - Missing symbols for precompiled .NET code: This is [getsentry/pdb#153](https://github.com/getsentry/pdb/issues/153), which has a potential patch in [getsentry/pdb#154](https://github.com/getsentry/pdb/pull/154).
+ - CoreCLR support could be better - some of it isn't working correctly any more (see [#483](https://github.com/mstange/samply/issues/483))
+
+### Breaking changes
+
+ - The minimum supported Rust version is now 1.77.
+
+### Features
+
+ - Windows: Initial support.
+ - macOS: Support attaching to running processes and their subprocesses ([#190](https://github.com/mstange/samply/pull/190), by @vvuk, and [#425](https://github.com/mstange/samply/pull/425), by @tmm1)
+ - macOS: Add `samply setup` to code-sign samply so that attaching to running processes can work ([#217](https://github.com/mstange/samply/pull/217) + [#353](https://github.com/mstange/samply/pull/353), by @vvuk)
+ - All platforms: `samply import` has much better support for Android simpleperf now
+ - All platforms: Add `--main-thread-only` flag
+ - All platforms: Add `--include-args` argument
+ - Windows, Linux: Add `--per-cpu-threads` flag
+ - All platforms: Add `--symbol-dir`, `--windows-symbol-server`, `--windows-symbol-cache`, `--breakpad-symbol-server`, `--breakpad-symbol-dir`, `--breakpad-symbol-cache`, and `--simpleperf-binary-cache` arguments (various PRs, including some by @ishitatsuyuki)
+ - All platforms: Add `--address` option to specify the IP address at which the local server is listening ([#234](https://github.com/mstange/samply/pull/234), by @Rjected)
+ - All platforms: Add `--unstable-presymbolicate` flag ([#202](https://github.com/mstange/samply/pull/202), by @vvuk)
+
+### Fixes
+
+ - Fix build errors related to `zerocopy` and `zerocopy_derive` ([#356](https://github.com/mstange/samply/pull/356), by @mox692)
+ - macOS: Fix library enumeration on macOS 15 Sequoia ([#403](https://github.com/mstange/samply/pull/403), by @Maaarcocr)
+
 ## 0.12.0 - 2024-04-16
 
 ### Breaking changes