7a1b7cdf92
Implement Wasmtime's new API as designed by RFC 11. This is quite a large commit which has had lots of discussion externally, so for more information it's best to read the RFC thread and the PR thread.
80 lines
3.2 KiB
Rust
80 lines
3.2 KiB
Rust
use std::path::Path;
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use wasmtime::{
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Config, Engine, InstanceAllocationStrategy, InstanceLimits, ModuleLimits,
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PoolingAllocationStrategy, Store, Strategy,
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};
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use wasmtime_wast::WastContext;
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include!(concat!(env!("OUT_DIR"), "/wast_testsuite_tests.rs"));
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// Each of the tests included from `wast_testsuite_tests` will call this
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// function which actually executes the `wast` test suite given the `strategy`
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// to compile it.
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fn run_wast(wast: &str, strategy: Strategy, pooling: bool) -> anyhow::Result<()> {
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let wast = Path::new(wast);
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let simd = wast.iter().any(|s| s == "simd");
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let multi_memory = wast.iter().any(|s| s == "multi-memory");
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let module_linking = wast.iter().any(|s| s == "module-linking");
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let threads = wast.iter().any(|s| s == "threads");
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let bulk_mem = multi_memory || wast.iter().any(|s| s == "bulk-memory-operations");
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// Some simd tests assume support for multiple tables, which are introduced
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// by reference types.
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let reftypes = simd || wast.iter().any(|s| s == "reference-types");
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let mut cfg = Config::new();
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cfg.wasm_simd(simd)
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.wasm_bulk_memory(bulk_mem)
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.wasm_reference_types(reftypes || module_linking)
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.wasm_multi_memory(multi_memory || module_linking)
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.wasm_module_linking(module_linking)
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.wasm_threads(threads)
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.strategy(strategy)?
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.cranelift_debug_verifier(true);
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// By default we'll allocate huge chunks (6gb) of the address space for each
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// linear memory. This is typically fine but when we emulate tests with QEMU
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// it turns out that it causes memory usage to balloon massively. Leave a
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// knob here so on CI we can cut down the memory usage of QEMU and avoid the
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// OOM killer.
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//
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// Locally testing this out this drops QEMU's memory usage running this
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// tests suite from 10GiB to 600MiB. Previously we saw that crossing the
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// 10GiB threshold caused our processes to get OOM killed on CI.
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if std::env::var("WASMTIME_TEST_NO_HOG_MEMORY").is_ok() {
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cfg.static_memory_maximum_size(0);
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}
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if pooling {
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// The limits here are crafted such that the wast tests should pass.
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// However, these limits may become insufficient in the future as the wast tests change.
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// If a wast test fails because of a limit being "exceeded" or if memory/table
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// fails to grow, the values here will need to be adjusted.
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cfg.allocation_strategy(InstanceAllocationStrategy::Pooling {
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strategy: PoolingAllocationStrategy::NextAvailable,
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module_limits: ModuleLimits {
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imported_memories: 2,
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imported_tables: 2,
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imported_globals: 11,
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memories: 2,
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tables: 4,
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globals: 11,
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memory_pages: 805,
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..Default::default()
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},
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instance_limits: InstanceLimits {
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count: 450,
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..Default::default()
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},
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});
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}
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let store = Store::new(&Engine::new(&cfg)?, ());
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let mut wast_context = WastContext::new(store);
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wast_context.register_spectest()?;
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wast_context.run_file(wast)?;
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Ok(())
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}
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