e5a00b2497
cad39f86fb5a81f0e3b5116e8e989bab8af89718 bench: ensure wallet migration benchmark runs exactly once (Lőrinc)
c1f458aaa06d3e23f40b695dba07fb772b51fd58 ci: re-enable all benchmark runs (Lőrinc)
1da11dbc441790773502ffd5f60dc05191514a83 bench: clean up migrated descriptor wallets via loader teardown (Lőrinc)
Pull request description:
The low-priority `WalletMigration` benchmark existed for some time but was never run automatically in our CI.
Although the failure first surfaced on Windows as a hang during temporary directory cleanup, it could also be reproduced on Linux and macOS when forcing multiple iterations (e.g. via a long `--min-time`).
### Root causes
1. **Leaked open wallets on Windows**
`MigrateLegacyToDescriptor` produces two new descriptor wallets (the primary spendable wallet and a companion watch‑only wallet). Without unloading them, their database files remained open in the `WalletContext`, blocking directory removal and hanging the test harness.
<details><summary>Details</summary>
```bash
what(): filesystem error: cannot remove all: The process cannot access the file because it is being used by another process [C:\Users\RUNNER\~1\AppData\Local\Temp\test_common bitcoin\WalletMigration\d8ffd89a7700ce01c31f] [C:\Users\RUNNER~1\AppData\Local\Temp\test_common bitcoin\WalletMigration\d8ffd89a7700ce01c31f\regtest\wallet.dat]
```
</details>
2. **Undefined behavior on repeated runs**
The benchmark body calls `std::move(wallet)`, invalidating the local `wallet` pointer. Running more than one iteration causes a use-after-move by the sanitizers.
<details><summary>Details</summary>
```bash
error: bench_bitcoin 0x00067927: DW_TAG_member '_M_local_buf' refers to type 0x00000000000b3ba7 which extends beyond the bounds of 0x0006791d
* thread #1, name = 'b-test', stop reason = signal SIGSEGV: address not mapped to object (fault address: 0xc8)
* frame #0: 0x00005555556a3f33 bench_bitcoin`... basic_string<char>::length(this=<unavailable>) const at basic_string.h:1079:16
```
</details>
### Fixes
- **Automatic wallet teardown**
Wrap the benchmark in a `MakeWalletLoader` (owning a `WalletContext`), so that both migrated wallets are unloaded when the loader goes out of scope, eliminating any lingering open files.
- **Re-enable benchmarks in CI**
Drop the temporary filter in GitHub Actions. The `-sanity-check` run already executes each benchmark once, so `WalletMigration` now runs automatically without hangs or crashes.
- **Single iteration**
Configure the microbenchmark with `.epochs(1).epochIterations(1)`, ensuring the migration code runs exactly once and avoiding use-after-move.
No measurable change in benchmark performance.
ACKs for top commit:
maflcko:
review ACK cad39f86fb5a81f0e3b5116e8e989bab8af89718 🍥
furszy:
utACK cad39f86fb5a81
hebasto:
ACK cad39f86fb5a81f0e3b5116e8e989bab8af89718, tested on Ubuntu 25.04.
Tree-SHA512: 10343ce7ab9b63ba4f51a7673018215577ea7ec188e41d535a66d69d73b85bca6ba301c33f6920c02f8f7d686c75c65c4a4e9bdafb04b60be85d66aa743cfa20
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