cranelift

rust jit wasm webassembly runtime wasi cranelift sandbox wasmtime

Alex Crichton 0e41861662 Implement limiting WebAssembly execution with fuel (#2611 ) * Consume fuel during function execution This commit adds codegen infrastructure necessary to instrument wasm code to consume fuel as it executes. Currently nothing is really done with the fuel, but that'll come in later commits. The focus of this commit is to implement the codegen infrastructure necessary to consume fuel and account for fuel consumed correctly. * Periodically check remaining fuel in wasm JIT code This commit enables wasm code to periodically check to see if fuel has run out. When fuel runs out an intrinsic is called which can do what it needs to do in the result of fuel running out. For now a trap is thrown to have at least some semantics in synchronous stores, but another planned use for this feature is for asynchronous stores to periodically yield back to the host based on fuel running out. Checks for remaining fuel happen in the same locations as interrupt checks, which is to say the start of the function as well as loop headers. * Improve codegen by caching `const VMInterrupts` The location of the shared interrupt value and fuel value is through a double-indirection on the vmctx (load through the vmctx and then load through that pointer). The second pointer in this chain, however, never changes, so we can alter codegen to account for this and remove some extraneous load instructions and hopefully reduce some register pressure even maybe. Add tests fuel can abort infinite loops * More fuzzing with fuel Use fuel to time out modules in addition to time, using fuzz input to figure out which. * Update docs on trapping instructions * Fix doc links * Fix a fuzz test * Change setting fuel to adding fuel * Fix a doc link * Squelch some rustdoc warnings		4 years ago
..
api_calls.rs	Remove executable bit from Rust source files	4 years ago
compile.rs	Remove executable bit from Rust source files	4 years ago
differential.rs	Replace binaryen -ttf based fuzzing with wasm-smith (#2336)	4 years ago
differential_wasmi.rs	Add differential fuzzing against wasmi (a Wasm interpreter).	4 years ago
instantiate-maybe-invalid.rs	Implement limiting WebAssembly execution with fuel (#2611)	4 years ago
instantiate-swarm.rs	Implement limiting WebAssembly execution with fuel (#2611)	4 years ago
instantiate-wasm-smith.rs	Fix fuzzer expectation about valid modules	4 years ago
instantiate.rs	Fix fuzzer expectation about valid modules	4 years ago
peepmatic_compile.rs	peepmatic: Define fuzz targets for various parts of `peepmatic`	5 years ago
peepmatic_fst_differential.rs	peepmatic: Define fuzz targets for various parts of `peepmatic`	5 years ago
peepmatic_interp.rs	peepmatic: Define fuzz targets for various parts of `peepmatic`	5 years ago
peepmatic_parser.rs	peepmatic: Define fuzz targets for various parts of `peepmatic`	5 years ago
peepmatic_simple_automata.rs	peepmatic: Define fuzz targets for various parts of `peepmatic`	5 years ago
spectests.rs	Add a spec test fuzzer for Config (#1509)	5 years ago
table_ops.rs	Remove executable bits from a few Rust source files	4 years ago