1 //! Contains the common Wasmtime command line interface (CLI) flags. 2 3 use anyhow::{Context, Result}; 4 use clap::Parser; 5 use serde::Deserialize; 6 use std::{ 7 fmt, fs, 8 path::{Path, PathBuf}, 9 time::Duration, 10 }; 11 use wasmtime::Config; 12 13 pub mod opt; 14 15 #[cfg(feature = "logging")] 16 fn init_file_per_thread_logger(prefix: &'static str) { 17 file_per_thread_logger::initialize(prefix); 18 file_per_thread_logger::allow_uninitialized(); 19 20 // Extending behavior of default spawner: 21 // https://docs.rs/rayon/1.1.0/rayon/struct.ThreadPoolBuilder.html#method.spawn_handler 22 // Source code says DefaultSpawner is implementation detail and 23 // shouldn't be used directly. 24 #[cfg(feature = "parallel-compilation")] 25 rayon::ThreadPoolBuilder::new() 26 .spawn_handler(move |thread| { 27 let mut b = std::thread::Builder::new(); 28 if let Some(name) = thread.name() { 29 b = b.name(name.to_owned()); 30 } 31 if let Some(stack_size) = thread.stack_size() { 32 b = b.stack_size(stack_size); 33 } 34 b.spawn(move || { 35 file_per_thread_logger::initialize(prefix); 36 thread.run() 37 })?; 38 Ok(()) 39 }) 40 .build_global() 41 .unwrap(); 42 } 43 44 wasmtime_option_group! { 45 #[derive(PartialEq, Clone, Deserialize)] 46 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 47 pub struct OptimizeOptions { 48 /// Optimization level of generated code (0-2, s; default: 2) 49 #[serde(default)] 50 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 51 pub opt_level: Option<wasmtime::OptLevel>, 52 53 /// Register allocator algorithm choice. 54 #[serde(default)] 55 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 56 pub regalloc_algorithm: Option<wasmtime::RegallocAlgorithm>, 57 58 /// Do not allow Wasm linear memories to move in the host process's 59 /// address space. 60 pub memory_may_move: Option<bool>, 61 62 /// Initial virtual memory allocation size for memories. 63 pub memory_reservation: Option<u64>, 64 65 /// Bytes to reserve at the end of linear memory for growth into. 66 pub memory_reservation_for_growth: Option<u64>, 67 68 /// Size, in bytes, of guard pages for linear memories. 69 pub memory_guard_size: Option<u64>, 70 71 /// Indicates whether an unmapped region of memory is placed before all 72 /// linear memories. 73 pub guard_before_linear_memory: Option<bool>, 74 75 /// Whether to initialize tables lazily, so that instantiation is 76 /// fast but indirect calls are a little slower. If no, tables are 77 /// initialized eagerly from any active element segments that apply to 78 /// them during instantiation. (default: yes) 79 pub table_lazy_init: Option<bool>, 80 81 /// Enable the pooling allocator, in place of the on-demand allocator. 82 pub pooling_allocator: Option<bool>, 83 84 /// The number of decommits to do per batch. A batch size of 1 85 /// effectively disables decommit batching. (default: 1) 86 pub pooling_decommit_batch_size: Option<usize>, 87 88 /// How many bytes to keep resident between instantiations for the 89 /// pooling allocator in linear memories. 90 pub pooling_memory_keep_resident: Option<usize>, 91 92 /// How many bytes to keep resident between instantiations for the 93 /// pooling allocator in tables. 94 pub pooling_table_keep_resident: Option<usize>, 95 96 /// Enable memory protection keys for the pooling allocator; this can 97 /// optimize the size of memory slots. 98 #[serde(default)] 99 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 100 pub pooling_memory_protection_keys: Option<wasmtime::MpkEnabled>, 101 102 /// Sets an upper limit on how many memory protection keys (MPK) Wasmtime 103 /// will use. (default: 16) 104 pub pooling_max_memory_protection_keys: Option<usize>, 105 106 /// Configure attempting to initialize linear memory via a 107 /// copy-on-write mapping (default: yes) 108 pub memory_init_cow: Option<bool>, 109 110 /// Threshold below which CoW images are guaranteed to be used and be 111 /// dense. 112 pub memory_guaranteed_dense_image_size: Option<u64>, 113 114 /// The maximum number of WebAssembly instances which can be created 115 /// with the pooling allocator. 116 pub pooling_total_core_instances: Option<u32>, 117 118 /// The maximum number of WebAssembly components which can be created 119 /// with the pooling allocator. 120 pub pooling_total_component_instances: Option<u32>, 121 122 /// The maximum number of WebAssembly memories which can be created with 123 /// the pooling allocator. 124 pub pooling_total_memories: Option<u32>, 125 126 /// The maximum number of WebAssembly tables which can be created with 127 /// the pooling allocator. 128 pub pooling_total_tables: Option<u32>, 129 130 /// The maximum number of WebAssembly stacks which can be created with 131 /// the pooling allocator. 132 pub pooling_total_stacks: Option<u32>, 133 134 /// The maximum runtime size of each linear memory in the pooling 135 /// allocator, in bytes. 136 pub pooling_max_memory_size: Option<usize>, 137 138 /// The maximum table elements for any table defined in a module when 139 /// using the pooling allocator. 140 pub pooling_table_elements: Option<usize>, 141 142 /// The maximum size, in bytes, allocated for a core instance's metadata 143 /// when using the pooling allocator. 144 pub pooling_max_core_instance_size: Option<usize>, 145 146 /// Configures the maximum number of "unused warm slots" to retain in the 147 /// pooling allocator. (default: 100) 148 pub pooling_max_unused_warm_slots: Option<u32>, 149 150 /// How much memory, in bytes, to keep resident for async stacks allocated 151 /// with the pooling allocator. (default: 0) 152 pub pooling_async_stack_keep_resident: Option<usize>, 153 154 /// The maximum size, in bytes, allocated for a component instance's 155 /// `VMComponentContext` metadata. (default: 1MiB) 156 pub pooling_max_component_instance_size: Option<usize>, 157 158 /// The maximum number of core instances a single component may contain 159 /// (default is unlimited). 160 pub pooling_max_core_instances_per_component: Option<u32>, 161 162 /// The maximum number of Wasm linear memories that a single component may 163 /// transitively contain (default is unlimited). 164 pub pooling_max_memories_per_component: Option<u32>, 165 166 /// The maximum number of tables that a single component may transitively 167 /// contain (default is unlimited). 168 pub pooling_max_tables_per_component: Option<u32>, 169 170 /// The maximum number of defined tables for a core module. (default: 1) 171 pub pooling_max_tables_per_module: Option<u32>, 172 173 /// The maximum number of defined linear memories for a module. (default: 1) 174 pub pooling_max_memories_per_module: Option<u32>, 175 176 /// The maximum number of concurrent GC heaps supported. (default: 1000) 177 pub pooling_total_gc_heaps: Option<u32>, 178 179 /// Enable or disable the use of host signal handlers for traps. 180 pub signals_based_traps: Option<bool>, 181 182 /// DEPRECATED: Use `-Cmemory-guard-size=N` instead. 183 pub dynamic_memory_guard_size: Option<u64>, 184 185 /// DEPRECATED: Use `-Cmemory-guard-size=N` instead. 186 pub static_memory_guard_size: Option<u64>, 187 188 /// DEPRECATED: Use `-Cmemory-may-move` instead. 189 pub static_memory_forced: Option<bool>, 190 191 /// DEPRECATED: Use `-Cmemory-reservation=N` instead. 192 pub static_memory_maximum_size: Option<u64>, 193 194 /// DEPRECATED: Use `-Cmemory-reservation-for-growth=N` instead. 195 pub dynamic_memory_reserved_for_growth: Option<u64>, 196 } 197 198 enum Optimize { 199 ... 200 } 201 } 202 203 wasmtime_option_group! { 204 #[derive(PartialEq, Clone, Deserialize)] 205 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 206 pub struct CodegenOptions { 207 /// Either `cranelift` or `winch`. 208 /// 209 /// Currently only `cranelift` and `winch` are supported, but not all 210 /// builds of Wasmtime have both built in. 211 #[serde(default)] 212 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 213 pub compiler: Option<wasmtime::Strategy>, 214 /// Which garbage collector to use: `drc` or `null`. 215 /// 216 /// `drc` is the deferred reference-counting collector. 217 /// 218 /// `null` is the null garbage collector, which does not collect any 219 /// garbage. 220 /// 221 /// Note that not all builds of Wasmtime will have support for garbage 222 /// collection included. 223 #[serde(default)] 224 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 225 pub collector: Option<wasmtime::Collector>, 226 /// Enable Cranelift's internal debug verifier (expensive) 227 pub cranelift_debug_verifier: Option<bool>, 228 /// Whether or not to enable caching of compiled modules. 229 pub cache: Option<bool>, 230 /// Configuration for compiled module caching. 231 pub cache_config: Option<String>, 232 /// Whether or not to enable parallel compilation of modules. 233 pub parallel_compilation: Option<bool>, 234 /// Whether to enable proof-carrying code (PCC)-based validation. 235 pub pcc: Option<bool>, 236 /// Controls whether native unwind information is present in compiled 237 /// object files. 238 pub native_unwind_info: Option<bool>, 239 240 #[prefixed = "cranelift"] 241 #[serde(default)] 242 /// Set a cranelift-specific option. Use `wasmtime settings` to see 243 /// all. 244 pub cranelift: Vec<(String, Option<String>)>, 245 } 246 247 enum Codegen { 248 ... 249 } 250 } 251 252 wasmtime_option_group! { 253 #[derive(PartialEq, Clone, Deserialize)] 254 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 255 pub struct DebugOptions { 256 /// Enable generation of DWARF debug information in compiled code. 257 pub debug_info: Option<bool>, 258 /// Configure whether compiled code can map native addresses to wasm. 259 pub address_map: Option<bool>, 260 /// Configure whether logging is enabled. 261 pub logging: Option<bool>, 262 /// Configure whether logs are emitted to files 263 pub log_to_files: Option<bool>, 264 /// Enable coredump generation to this file after a WebAssembly trap. 265 pub coredump: Option<String>, 266 } 267 268 enum Debug { 269 ... 270 } 271 } 272 273 wasmtime_option_group! { 274 #[derive(PartialEq, Clone, Deserialize)] 275 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 276 pub struct WasmOptions { 277 /// Enable canonicalization of all NaN values. 278 pub nan_canonicalization: Option<bool>, 279 /// Enable execution fuel with N units fuel, trapping after running out 280 /// of fuel. 281 /// 282 /// Most WebAssembly instructions consume 1 unit of fuel. Some 283 /// instructions, such as `nop`, `drop`, `block`, and `loop`, consume 0 284 /// units, as any execution cost associated with them involves other 285 /// instructions which do consume fuel. 286 pub fuel: Option<u64>, 287 /// Yield when a global epoch counter changes, allowing for async 288 /// operation without blocking the executor. 289 pub epoch_interruption: Option<bool>, 290 /// Maximum stack size, in bytes, that wasm is allowed to consume before a 291 /// stack overflow is reported. 292 pub max_wasm_stack: Option<usize>, 293 /// Stack size, in bytes, that will be allocated for async stacks. 294 /// 295 /// Note that this must be larger than `max-wasm-stack` and the 296 /// difference between the two is how much stack the host has to execute 297 /// on. 298 pub async_stack_size: Option<usize>, 299 /// Configures whether or not stacks used for async futures are zeroed 300 /// before (re)use as a defense-in-depth mechanism. (default: false) 301 pub async_stack_zeroing: Option<bool>, 302 /// Allow unknown exports when running commands. 303 pub unknown_exports_allow: Option<bool>, 304 /// Allow the main module to import unknown functions, using an 305 /// implementation that immediately traps, when running commands. 306 pub unknown_imports_trap: Option<bool>, 307 /// Allow the main module to import unknown functions, using an 308 /// implementation that returns default values, when running commands. 309 pub unknown_imports_default: Option<bool>, 310 /// Enables memory error checking. (see wmemcheck.md for more info) 311 pub wmemcheck: Option<bool>, 312 /// Maximum size, in bytes, that a linear memory is allowed to reach. 313 /// 314 /// Growth beyond this limit will cause `memory.grow` instructions in 315 /// WebAssembly modules to return -1 and fail. 316 pub max_memory_size: Option<usize>, 317 /// Maximum size, in table elements, that a table is allowed to reach. 318 pub max_table_elements: Option<usize>, 319 /// Maximum number of WebAssembly instances allowed to be created. 320 pub max_instances: Option<usize>, 321 /// Maximum number of WebAssembly tables allowed to be created. 322 pub max_tables: Option<usize>, 323 /// Maximum number of WebAssembly linear memories allowed to be created. 324 pub max_memories: Option<usize>, 325 /// Force a trap to be raised on `memory.grow` and `table.grow` failure 326 /// instead of returning -1 from these instructions. 327 /// 328 /// This is not necessarily a spec-compliant option to enable but can be 329 /// useful for tracking down a backtrace of what is requesting so much 330 /// memory, for example. 331 pub trap_on_grow_failure: Option<bool>, 332 /// Maximum execution time of wasm code before timing out (1, 2s, 100ms, etc) 333 pub timeout: Option<Duration>, 334 /// Configures support for all WebAssembly proposals implemented. 335 pub all_proposals: Option<bool>, 336 /// Configure support for the bulk memory proposal. 337 pub bulk_memory: Option<bool>, 338 /// Configure support for the multi-memory proposal. 339 pub multi_memory: Option<bool>, 340 /// Configure support for the multi-value proposal. 341 pub multi_value: Option<bool>, 342 /// Configure support for the reference-types proposal. 343 pub reference_types: Option<bool>, 344 /// Configure support for the simd proposal. 345 pub simd: Option<bool>, 346 /// Configure support for the relaxed-simd proposal. 347 pub relaxed_simd: Option<bool>, 348 /// Configure forcing deterministic and host-independent behavior of 349 /// the relaxed-simd instructions. 350 /// 351 /// By default these instructions may have architecture-specific behavior as 352 /// allowed by the specification, but this can be used to force the behavior 353 /// of these instructions to match the deterministic behavior classified in 354 /// the specification. Note that enabling this option may come at a 355 /// performance cost. 356 pub relaxed_simd_deterministic: Option<bool>, 357 /// Configure support for the tail-call proposal. 358 pub tail_call: Option<bool>, 359 /// Configure support for the threads proposal. 360 pub threads: Option<bool>, 361 /// Configure support for the memory64 proposal. 362 pub memory64: Option<bool>, 363 /// Configure support for the component-model proposal. 364 pub component_model: Option<bool>, 365 /// Component model support for async lifting/lowering. 366 pub component_model_async: Option<bool>, 367 /// Component model support for async lifting/lowering: this corresponds 368 /// to the �� emoji in the component model specification. 369 pub component_model_async_builtins: Option<bool>, 370 /// Component model support for async lifting/lowering: this corresponds 371 /// to the �� emoji in the component model specification. 372 pub component_model_async_stackful: Option<bool>, 373 /// Configure support for the function-references proposal. 374 pub function_references: Option<bool>, 375 /// Configure support for the GC proposal. 376 pub gc: Option<bool>, 377 /// Configure support for the custom-page-sizes proposal. 378 pub custom_page_sizes: Option<bool>, 379 /// Configure support for the wide-arithmetic proposal. 380 pub wide_arithmetic: Option<bool>, 381 /// Configure support for the extended-const proposal. 382 pub extended_const: Option<bool>, 383 } 384 385 enum Wasm { 386 ... 387 } 388 } 389 390 wasmtime_option_group! { 391 #[derive(PartialEq, Clone, Deserialize)] 392 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 393 pub struct WasiOptions { 394 /// Enable support for WASI CLI APIs, including filesystems, sockets, clocks, and random. 395 pub cli: Option<bool>, 396 /// Enable WASI APIs marked as: @unstable(feature = cli-exit-with-code) 397 pub cli_exit_with_code: Option<bool>, 398 /// Deprecated alias for `cli` 399 pub common: Option<bool>, 400 /// Enable support for WASI neural network imports (experimental) 401 pub nn: Option<bool>, 402 /// Enable support for WASI threading imports (experimental). Implies preview2=false. 403 pub threads: Option<bool>, 404 /// Enable support for WASI HTTP imports 405 pub http: Option<bool>, 406 /// Number of distinct write calls to the outgoing body's output-stream 407 /// that the implementation will buffer. 408 /// Default: 1. 409 pub http_outgoing_body_buffer_chunks: Option<usize>, 410 /// Maximum size allowed in a write call to the outgoing body's output-stream. 411 /// Default: 1024 * 1024. 412 pub http_outgoing_body_chunk_size: Option<usize>, 413 /// Enable support for WASI config imports (experimental) 414 pub config: Option<bool>, 415 /// Enable support for WASI key-value imports (experimental) 416 pub keyvalue: Option<bool>, 417 /// Inherit environment variables and file descriptors following the 418 /// systemd listen fd specification (UNIX only) 419 pub listenfd: Option<bool>, 420 /// Grant access to the given TCP listen socket 421 #[serde(default)] 422 pub tcplisten: Vec<String>, 423 /// Enable support for WASI TLS (Transport Layer Security) imports (experimental) 424 pub tls: Option<bool>, 425 /// Implement WASI Preview1 using new Preview2 implementation (true, default) or legacy 426 /// implementation (false) 427 pub preview2: Option<bool>, 428 /// Pre-load machine learning graphs (i.e., models) for use by wasi-nn. 429 /// 430 /// Each use of the flag will preload a ML model from the host directory 431 /// using the given model encoding. The model will be mapped to the 432 /// directory name: e.g., `--wasi-nn-graph openvino:/foo/bar` will preload 433 /// an OpenVINO model named `bar`. Note that which model encodings are 434 /// available is dependent on the backends implemented in the 435 /// `wasmtime_wasi_nn` crate. 436 #[serde(skip)] 437 pub nn_graph: Vec<WasiNnGraph>, 438 /// Flag for WASI preview2 to inherit the host's network within the 439 /// guest so it has full access to all addresses/ports/etc. 440 pub inherit_network: Option<bool>, 441 /// Indicates whether `wasi:sockets/ip-name-lookup` is enabled or not. 442 pub allow_ip_name_lookup: Option<bool>, 443 /// Indicates whether `wasi:sockets` TCP support is enabled or not. 444 pub tcp: Option<bool>, 445 /// Indicates whether `wasi:sockets` UDP support is enabled or not. 446 pub udp: Option<bool>, 447 /// Enable WASI APIs marked as: @unstable(feature = network-error-code) 448 pub network_error_code: Option<bool>, 449 /// Allows imports from the `wasi_unstable` core wasm module. 450 pub preview0: Option<bool>, 451 /// Inherit all environment variables from the parent process. 452 /// 453 /// This option can be further overwritten with `--env` flags. 454 pub inherit_env: Option<bool>, 455 /// Pass a wasi config variable to the program. 456 #[serde(skip)] 457 pub config_var: Vec<KeyValuePair>, 458 /// Preset data for the In-Memory provider of WASI key-value API. 459 #[serde(skip)] 460 pub keyvalue_in_memory_data: Vec<KeyValuePair>, 461 } 462 463 enum Wasi { 464 ... 465 } 466 } 467 468 #[derive(Debug, Clone, PartialEq)] 469 pub struct WasiNnGraph { 470 pub format: String, 471 pub dir: String, 472 } 473 474 #[derive(Debug, Clone, PartialEq)] 475 pub struct KeyValuePair { 476 pub key: String, 477 pub value: String, 478 } 479 480 /// Common options for commands that translate WebAssembly modules 481 #[derive(Parser, Clone, Deserialize)] 482 #[serde(deny_unknown_fields)] 483 pub struct CommonOptions { 484 // These options groups are used to parse `-O` and such options but aren't 485 // the raw form consumed by the CLI. Instead they're pushed into the `pub` 486 // fields below as part of the `configure` method. 487 // 488 // Ideally clap would support `pub opts: OptimizeOptions` and parse directly 489 // into that but it does not appear to do so for multiple `-O` flags for 490 // now. 491 /// Optimization and tuning related options for wasm performance, `-O help` to 492 /// see all. 493 #[arg(short = 'O', long = "optimize", value_name = "KEY[=VAL[,..]]")] 494 #[serde(skip)] 495 opts_raw: Vec<opt::CommaSeparated<Optimize>>, 496 497 /// Codegen-related configuration options, `-C help` to see all. 498 #[arg(short = 'C', long = "codegen", value_name = "KEY[=VAL[,..]]")] 499 #[serde(skip)] 500 codegen_raw: Vec<opt::CommaSeparated<Codegen>>, 501 502 /// Debug-related configuration options, `-D help` to see all. 503 #[arg(short = 'D', long = "debug", value_name = "KEY[=VAL[,..]]")] 504 #[serde(skip)] 505 debug_raw: Vec<opt::CommaSeparated<Debug>>, 506 507 /// Options for configuring semantic execution of WebAssembly, `-W help` to see 508 /// all. 509 #[arg(short = 'W', long = "wasm", value_name = "KEY[=VAL[,..]]")] 510 #[serde(skip)] 511 wasm_raw: Vec<opt::CommaSeparated<Wasm>>, 512 513 /// Options for configuring WASI and its proposals, `-S help` to see all. 514 #[arg(short = 'S', long = "wasi", value_name = "KEY[=VAL[,..]]")] 515 #[serde(skip)] 516 wasi_raw: Vec<opt::CommaSeparated<Wasi>>, 517 518 // These fields are filled in by the `configure` method below via the 519 // options parsed from the CLI above. This is what the CLI should use. 520 #[arg(skip)] 521 #[serde(skip)] 522 configured: bool, 523 524 #[arg(skip)] 525 #[serde(rename = "optimize", default)] 526 pub opts: OptimizeOptions, 527 528 #[arg(skip)] 529 #[serde(rename = "codegen", default)] 530 pub codegen: CodegenOptions, 531 532 #[arg(skip)] 533 #[serde(rename = "debug", default)] 534 pub debug: DebugOptions, 535 536 #[arg(skip)] 537 #[serde(rename = "wasm", default)] 538 pub wasm: WasmOptions, 539 540 #[arg(skip)] 541 #[serde(rename = "wasi", default)] 542 pub wasi: WasiOptions, 543 544 /// The target triple; default is the host triple 545 #[arg(long, value_name = "TARGET")] 546 #[serde(skip)] 547 pub target: Option<String>, 548 549 /// Use the specified TOML configuration file. 550 /// This TOML configuration file can provide same configuration options as the 551 /// `--optimize`, `--codgen`, `--debug`, `--wasm`, `--wasi` CLI options, with a couple exceptions. 552 /// 553 /// Additional options specified on the command line will take precedent over options loaded from 554 /// this TOML file. 555 #[arg(long = "config", value_name = "FILE")] 556 #[serde(skip)] 557 pub config: Option<PathBuf>, 558 } 559 560 macro_rules! match_feature { 561 ( 562 [$feat:tt : $config:expr] 563 $val:ident => $e:expr, 564 $p:pat => err, 565 ) => { 566 #[cfg(feature = $feat)] 567 { 568 if let Some($val) = $config { 569 $e; 570 } 571 } 572 #[cfg(not(feature = $feat))] 573 { 574 if let Some($p) = $config { 575 anyhow::bail!(concat!("support for ", $feat, " disabled at compile time")); 576 } 577 } 578 }; 579 } 580 581 impl CommonOptions { 582 /// Creates a blank new set of [`CommonOptions`] that can be configured. 583 pub fn new() -> CommonOptions { 584 CommonOptions { 585 opts_raw: Vec::new(), 586 codegen_raw: Vec::new(), 587 debug_raw: Vec::new(), 588 wasm_raw: Vec::new(), 589 wasi_raw: Vec::new(), 590 configured: true, 591 opts: Default::default(), 592 codegen: Default::default(), 593 debug: Default::default(), 594 wasm: Default::default(), 595 wasi: Default::default(), 596 target: None, 597 config: None, 598 } 599 } 600 601 fn configure(&mut self) -> Result<()> { 602 if self.configured { 603 return Ok(()); 604 } 605 self.configured = true; 606 if let Some(toml_config_path) = &self.config { 607 let toml_options = CommonOptions::from_file(toml_config_path)?; 608 self.opts = toml_options.opts; 609 self.codegen = toml_options.codegen; 610 self.debug = toml_options.debug; 611 self.wasm = toml_options.wasm; 612 self.wasi = toml_options.wasi; 613 } 614 self.opts.configure_with(&self.opts_raw); 615 self.codegen.configure_with(&self.codegen_raw); 616 self.debug.configure_with(&self.debug_raw); 617 self.wasm.configure_with(&self.wasm_raw); 618 self.wasi.configure_with(&self.wasi_raw); 619 Ok(()) 620 } 621 622 pub fn init_logging(&mut self) -> Result<()> { 623 self.configure()?; 624 if self.debug.logging == Some(false) { 625 return Ok(()); 626 } 627 #[cfg(feature = "logging")] 628 if self.debug.log_to_files == Some(true) { 629 let prefix = "wasmtime.dbg."; 630 init_file_per_thread_logger(prefix); 631 } else { 632 use std::io::IsTerminal; 633 use tracing_subscriber::{EnvFilter, FmtSubscriber}; 634 let builder = FmtSubscriber::builder() 635 .with_writer(std::io::stderr) 636 .with_env_filter(EnvFilter::from_env("WASMTIME_LOG")) 637 .with_ansi(std::io::stderr().is_terminal()); 638 if std::env::var("WASMTIME_LOG_NO_CONTEXT").is_ok_and(|value| value.eq("1")) { 639 builder 640 .with_level(false) 641 .with_target(false) 642 .without_time() 643 .init() 644 } else { 645 builder.init(); 646 } 647 } 648 #[cfg(not(feature = "logging"))] 649 if self.debug.log_to_files == Some(true) || self.debug.logging == Some(true) { 650 anyhow::bail!("support for logging disabled at compile time"); 651 } 652 Ok(()) 653 } 654 655 pub fn config(&mut self, pooling_allocator_default: Option<bool>) -> Result<Config> { 656 self.configure()?; 657 let mut config = Config::new(); 658 659 match_feature! { 660 ["cranelift" : self.codegen.compiler] 661 strategy => config.strategy(strategy), 662 _ => err, 663 } 664 match_feature! { 665 ["gc" : self.codegen.collector] 666 collector => config.collector(collector), 667 _ => err, 668 } 669 if let Some(target) = &self.target { 670 config.target(target)?; 671 } 672 match_feature! { 673 ["cranelift" : self.codegen.cranelift_debug_verifier] 674 enable => config.cranelift_debug_verifier(enable), 675 true => err, 676 } 677 if let Some(enable) = self.debug.debug_info { 678 config.debug_info(enable); 679 } 680 if self.debug.coredump.is_some() { 681 #[cfg(feature = "coredump")] 682 config.coredump_on_trap(true); 683 #[cfg(not(feature = "coredump"))] 684 anyhow::bail!("support for coredumps disabled at compile time"); 685 } 686 match_feature! { 687 ["cranelift" : self.opts.opt_level] 688 level => config.cranelift_opt_level(level), 689 _ => err, 690 } 691 match_feature! { 692 ["cranelift": self.opts.regalloc_algorithm] 693 algo => config.cranelift_regalloc_algorithm(algo), 694 _ => err, 695 } 696 match_feature! { 697 ["cranelift" : self.wasm.nan_canonicalization] 698 enable => config.cranelift_nan_canonicalization(enable), 699 true => err, 700 } 701 match_feature! { 702 ["cranelift" : self.codegen.pcc] 703 enable => config.cranelift_pcc(enable), 704 true => err, 705 } 706 707 self.enable_wasm_features(&mut config)?; 708 709 #[cfg(feature = "cranelift")] 710 for (name, value) in self.codegen.cranelift.iter() { 711 let name = name.replace('-', "_"); 712 unsafe { 713 match value { 714 Some(val) => { 715 config.cranelift_flag_set(&name, val); 716 } 717 None => { 718 config.cranelift_flag_enable(&name); 719 } 720 } 721 } 722 } 723 #[cfg(not(feature = "cranelift"))] 724 if !self.codegen.cranelift.is_empty() { 725 anyhow::bail!("support for cranelift disabled at compile time"); 726 } 727 728 #[cfg(feature = "cache")] 729 if self.codegen.cache != Some(false) { 730 match &self.codegen.cache_config { 731 Some(path) => { 732 config.cache_config_load(path)?; 733 } 734 None => { 735 config.cache_config_load_default()?; 736 } 737 } 738 } 739 #[cfg(not(feature = "cache"))] 740 if self.codegen.cache == Some(true) { 741 anyhow::bail!("support for caching disabled at compile time"); 742 } 743 744 match_feature! { 745 ["parallel-compilation" : self.codegen.parallel_compilation] 746 enable => config.parallel_compilation(enable), 747 true => err, 748 } 749 750 let memory_reservation = self 751 .opts 752 .memory_reservation 753 .or(self.opts.static_memory_maximum_size); 754 if let Some(size) = memory_reservation { 755 config.memory_reservation(size); 756 } 757 758 if let Some(enable) = self.opts.static_memory_forced { 759 config.memory_may_move(!enable); 760 } 761 if let Some(enable) = self.opts.memory_may_move { 762 config.memory_may_move(enable); 763 } 764 765 let memory_guard_size = self 766 .opts 767 .static_memory_guard_size 768 .or(self.opts.dynamic_memory_guard_size) 769 .or(self.opts.memory_guard_size); 770 if let Some(size) = memory_guard_size { 771 config.memory_guard_size(size); 772 } 773 774 let mem_for_growth = self 775 .opts 776 .memory_reservation_for_growth 777 .or(self.opts.dynamic_memory_reserved_for_growth); 778 if let Some(size) = mem_for_growth { 779 config.memory_reservation_for_growth(size); 780 } 781 if let Some(enable) = self.opts.guard_before_linear_memory { 782 config.guard_before_linear_memory(enable); 783 } 784 if let Some(enable) = self.opts.table_lazy_init { 785 config.table_lazy_init(enable); 786 } 787 788 // If fuel has been configured, set the `consume fuel` flag on the config. 789 if self.wasm.fuel.is_some() { 790 config.consume_fuel(true); 791 } 792 793 if let Some(enable) = self.wasm.epoch_interruption { 794 config.epoch_interruption(enable); 795 } 796 if let Some(enable) = self.debug.address_map { 797 config.generate_address_map(enable); 798 } 799 if let Some(enable) = self.opts.memory_init_cow { 800 config.memory_init_cow(enable); 801 } 802 if let Some(size) = self.opts.memory_guaranteed_dense_image_size { 803 config.memory_guaranteed_dense_image_size(size); 804 } 805 if let Some(enable) = self.opts.signals_based_traps { 806 config.signals_based_traps(enable); 807 } 808 if let Some(enable) = self.codegen.native_unwind_info { 809 config.native_unwind_info(enable); 810 } 811 812 match_feature! { 813 ["pooling-allocator" : self.opts.pooling_allocator.or(pooling_allocator_default)] 814 enable => { 815 if enable { 816 let mut cfg = wasmtime::PoolingAllocationConfig::default(); 817 if let Some(size) = self.opts.pooling_memory_keep_resident { 818 cfg.linear_memory_keep_resident(size); 819 } 820 if let Some(size) = self.opts.pooling_table_keep_resident { 821 cfg.table_keep_resident(size); 822 } 823 if let Some(limit) = self.opts.pooling_total_core_instances { 824 cfg.total_core_instances(limit); 825 } 826 if let Some(limit) = self.opts.pooling_total_component_instances { 827 cfg.total_component_instances(limit); 828 } 829 if let Some(limit) = self.opts.pooling_total_memories { 830 cfg.total_memories(limit); 831 } 832 if let Some(limit) = self.opts.pooling_total_tables { 833 cfg.total_tables(limit); 834 } 835 if let Some(limit) = self.opts.pooling_table_elements 836 .or(self.wasm.max_table_elements) 837 { 838 cfg.table_elements(limit); 839 } 840 if let Some(limit) = self.opts.pooling_max_core_instance_size { 841 cfg.max_core_instance_size(limit); 842 } 843 match_feature! { 844 ["async" : self.opts.pooling_total_stacks] 845 limit => cfg.total_stacks(limit), 846 _ => err, 847 } 848 if let Some(max) = self.opts.pooling_max_memory_size 849 .or(self.wasm.max_memory_size) 850 { 851 cfg.max_memory_size(max); 852 } 853 if let Some(size) = self.opts.pooling_decommit_batch_size { 854 cfg.decommit_batch_size(size); 855 } 856 if let Some(max) = self.opts.pooling_max_unused_warm_slots { 857 cfg.max_unused_warm_slots(max); 858 } 859 match_feature! { 860 ["async" : self.opts.pooling_async_stack_keep_resident] 861 size => cfg.async_stack_keep_resident(size), 862 _ => err, 863 } 864 if let Some(max) = self.opts.pooling_max_component_instance_size { 865 cfg.max_component_instance_size(max); 866 } 867 if let Some(max) = self.opts.pooling_max_core_instances_per_component { 868 cfg.max_core_instances_per_component(max); 869 } 870 if let Some(max) = self.opts.pooling_max_memories_per_component { 871 cfg.max_memories_per_component(max); 872 } 873 if let Some(max) = self.opts.pooling_max_tables_per_component { 874 cfg.max_tables_per_component(max); 875 } 876 if let Some(max) = self.opts.pooling_max_tables_per_module { 877 cfg.max_tables_per_module(max); 878 } 879 if let Some(max) = self.opts.pooling_max_memories_per_module { 880 cfg.max_memories_per_module(max); 881 } 882 match_feature! { 883 ["memory-protection-keys" : self.opts.pooling_memory_protection_keys] 884 enable => cfg.memory_protection_keys(enable), 885 _ => err, 886 } 887 match_feature! { 888 ["memory-protection-keys" : self.opts.pooling_max_memory_protection_keys] 889 max => cfg.max_memory_protection_keys(max), 890 _ => err, 891 } 892 match_feature! { 893 ["gc" : self.opts.pooling_total_gc_heaps] 894 max => cfg.total_gc_heaps(max), 895 _ => err, 896 } 897 config.allocation_strategy(wasmtime::InstanceAllocationStrategy::Pooling(cfg)); 898 } 899 }, 900 true => err, 901 } 902 903 if self.opts.pooling_memory_protection_keys.is_some() 904 && !self.opts.pooling_allocator.unwrap_or(false) 905 { 906 anyhow::bail!("memory protection keys require the pooling allocator"); 907 } 908 909 if self.opts.pooling_max_memory_protection_keys.is_some() 910 && !self.opts.pooling_memory_protection_keys.is_some() 911 { 912 anyhow::bail!( 913 "max memory protection keys requires memory protection keys to be enabled" 914 ); 915 } 916 917 match_feature! { 918 ["async" : self.wasm.async_stack_size] 919 size => config.async_stack_size(size), 920 _ => err, 921 } 922 match_feature! { 923 ["async" : self.wasm.async_stack_zeroing] 924 enable => config.async_stack_zeroing(enable), 925 _ => err, 926 } 927 928 if let Some(max) = self.wasm.max_wasm_stack { 929 config.max_wasm_stack(max); 930 931 // If `-Wasync-stack-size` isn't passed then automatically adjust it 932 // to the wasm stack size provided here too. That prevents the need 933 // to pass both when one can generally be inferred from the other. 934 #[cfg(feature = "async")] 935 if self.wasm.async_stack_size.is_none() { 936 const DEFAULT_HOST_STACK: usize = 512 << 10; 937 config.async_stack_size(max + DEFAULT_HOST_STACK); 938 } 939 } 940 941 if let Some(enable) = self.wasm.relaxed_simd_deterministic { 942 config.relaxed_simd_deterministic(enable); 943 } 944 match_feature! { 945 ["cranelift" : self.wasm.wmemcheck] 946 enable => config.wmemcheck(enable), 947 true => err, 948 } 949 950 Ok(config) 951 } 952 953 pub fn enable_wasm_features(&self, config: &mut Config) -> Result<()> { 954 let all = self.wasm.all_proposals; 955 956 if let Some(enable) = self.wasm.simd.or(all) { 957 config.wasm_simd(enable); 958 } 959 if let Some(enable) = self.wasm.relaxed_simd.or(all) { 960 config.wasm_relaxed_simd(enable); 961 } 962 if let Some(enable) = self.wasm.bulk_memory.or(all) { 963 config.wasm_bulk_memory(enable); 964 } 965 if let Some(enable) = self.wasm.multi_value.or(all) { 966 config.wasm_multi_value(enable); 967 } 968 if let Some(enable) = self.wasm.tail_call.or(all) { 969 config.wasm_tail_call(enable); 970 } 971 if let Some(enable) = self.wasm.multi_memory.or(all) { 972 config.wasm_multi_memory(enable); 973 } 974 if let Some(enable) = self.wasm.memory64.or(all) { 975 config.wasm_memory64(enable); 976 } 977 if let Some(enable) = self.wasm.custom_page_sizes.or(all) { 978 config.wasm_custom_page_sizes(enable); 979 } 980 if let Some(enable) = self.wasm.wide_arithmetic.or(all) { 981 config.wasm_wide_arithmetic(enable); 982 } 983 if let Some(enable) = self.wasm.extended_const.or(all) { 984 config.wasm_extended_const(enable); 985 } 986 987 macro_rules! handle_conditionally_compiled { 988 ($(($feature:tt, $field:tt, $method:tt))*) => ($( 989 if let Some(enable) = self.wasm.$field.or(all) { 990 #[cfg(feature = $feature)] 991 config.$method(enable); 992 #[cfg(not(feature = $feature))] 993 if enable && all.is_none() { 994 anyhow::bail!("support for {} was disabled at compile-time", $feature); 995 } 996 } 997 )*) 998 } 999 1000 handle_conditionally_compiled! { 1001 ("component-model", component_model, wasm_component_model) 1002 ("component-model-async", component_model_async, wasm_component_model_async) 1003 ("component-model-async", component_model_async_builtins, wasm_component_model_async_builtins) 1004 ("component-model-async", component_model_async_stackful, wasm_component_model_async_stackful) 1005 ("threads", threads, wasm_threads) 1006 ("gc", gc, wasm_gc) 1007 ("gc", reference_types, wasm_reference_types) 1008 ("gc", function_references, wasm_function_references) 1009 } 1010 Ok(()) 1011 } 1012 1013 pub fn from_file<P: AsRef<Path>>(path: P) -> Result<Self> { 1014 let path_ref = path.as_ref(); 1015 let file_contents = fs::read_to_string(path_ref) 1016 .with_context(|| format!("failed to read config file: {path_ref:?}"))?; 1017 toml::from_str::<CommonOptions>(&file_contents) 1018 .with_context(|| format!("failed to parse TOML config file {path_ref:?}")) 1019 } 1020 } 1021 1022 #[cfg(test)] 1023 mod tests { 1024 use wasmtime::{OptLevel, RegallocAlgorithm}; 1025 1026 use super::*; 1027 1028 #[test] 1029 fn from_toml() { 1030 // empty toml 1031 let empty_toml = ""; 1032 let mut common_options: CommonOptions = toml::from_str(empty_toml).unwrap(); 1033 common_options.config(None).unwrap(); 1034 1035 // basic toml 1036 let basic_toml = r#" 1037 [optimize] 1038 [codegen] 1039 [debug] 1040 [wasm] 1041 [wasi] 1042 "#; 1043 let mut common_options: CommonOptions = toml::from_str(basic_toml).unwrap(); 1044 common_options.config(None).unwrap(); 1045 1046 // toml with custom deserialization to match CLI flag parsing 1047 for (opt_value, expected) in [ 1048 ("0", Some(OptLevel::None)), 1049 ("1", Some(OptLevel::Speed)), 1050 ("2", Some(OptLevel::Speed)), 1051 ("\"s\"", Some(OptLevel::SpeedAndSize)), 1052 ("\"hello\"", None), // should fail 1053 ("3", None), // should fail 1054 ] { 1055 let toml = format!( 1056 r#" 1057 [optimize] 1058 opt-level = {opt_value} 1059 "#, 1060 ); 1061 let parsed_opt_level = toml::from_str::<CommonOptions>(&toml) 1062 .ok() 1063 .and_then(|common_options| common_options.opts.opt_level); 1064 1065 assert_eq!( 1066 parsed_opt_level, expected, 1067 "Mismatch for input '{opt_value}'. Parsed: {parsed_opt_level:?}, Expected: {expected:?}" 1068 ); 1069 } 1070 1071 // Regalloc algorithm 1072 for (regalloc_value, expected) in [ 1073 ("\"backtracking\"", Some(RegallocAlgorithm::Backtracking)), 1074 ("\"single-pass\"", Some(RegallocAlgorithm::SinglePass)), 1075 ("\"hello\"", None), // should fail 1076 ("3", None), // should fail 1077 ("true", None), // should fail 1078 ] { 1079 let toml = format!( 1080 r#" 1081 [optimize] 1082 regalloc-algorithm = {regalloc_value} 1083 "#, 1084 ); 1085 let parsed_regalloc_algorithm = toml::from_str::<CommonOptions>(&toml) 1086 .ok() 1087 .and_then(|common_options| common_options.opts.regalloc_algorithm); 1088 assert_eq!( 1089 parsed_regalloc_algorithm, expected, 1090 "Mismatch for input '{regalloc_value}'. Parsed: {parsed_regalloc_algorithm:?}, Expected: {expected:?}" 1091 ); 1092 } 1093 1094 // Strategy 1095 for (strategy_value, expected) in [ 1096 ("\"cranelift\"", Some(wasmtime::Strategy::Cranelift)), 1097 ("\"winch\"", Some(wasmtime::Strategy::Winch)), 1098 ("\"hello\"", None), // should fail 1099 ("5", None), // should fail 1100 ("true", None), // should fail 1101 ] { 1102 let toml = format!( 1103 r#" 1104 [codegen] 1105 compiler = {strategy_value} 1106 "#, 1107 ); 1108 let parsed_strategy = toml::from_str::<CommonOptions>(&toml) 1109 .ok() 1110 .and_then(|common_options| common_options.codegen.compiler); 1111 assert_eq!( 1112 parsed_strategy, expected, 1113 "Mismatch for input '{strategy_value}'. Parsed: {parsed_strategy:?}, Expected: {expected:?}", 1114 ); 1115 } 1116 1117 // Collector 1118 for (collector_value, expected) in [ 1119 ( 1120 "\"drc\"", 1121 Some(wasmtime::Collector::DeferredReferenceCounting), 1122 ), 1123 ("\"null\"", Some(wasmtime::Collector::Null)), 1124 ("\"hello\"", None), // should fail 1125 ("5", None), // should fail 1126 ("true", None), // should fail 1127 ] { 1128 let toml = format!( 1129 r#" 1130 [codegen] 1131 collector = {collector_value} 1132 "#, 1133 ); 1134 let parsed_collector = toml::from_str::<CommonOptions>(&toml) 1135 .ok() 1136 .and_then(|common_options| common_options.codegen.collector); 1137 assert_eq!( 1138 parsed_collector, expected, 1139 "Mismatch for input '{collector_value}'. Parsed: {parsed_collector:?}, Expected: {expected:?}", 1140 ); 1141 } 1142 } 1143 } 1144 1145 impl Default for CommonOptions { 1146 fn default() -> CommonOptions { 1147 CommonOptions::new() 1148 } 1149 } 1150 1151 impl fmt::Display for CommonOptions { 1152 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { 1153 let CommonOptions { 1154 codegen_raw, 1155 codegen, 1156 debug_raw, 1157 debug, 1158 opts_raw, 1159 opts, 1160 wasm_raw, 1161 wasm, 1162 wasi_raw, 1163 wasi, 1164 configured, 1165 target, 1166 config, 1167 } = self; 1168 if let Some(target) = target { 1169 write!(f, "--target {target} ")?; 1170 } 1171 if let Some(config) = config { 1172 write!(f, "--config {} ", config.display())?; 1173 } 1174 1175 let codegen_flags; 1176 let opts_flags; 1177 let wasi_flags; 1178 let wasm_flags; 1179 let debug_flags; 1180 1181 if *configured { 1182 codegen_flags = codegen.to_options(); 1183 debug_flags = debug.to_options(); 1184 wasi_flags = wasi.to_options(); 1185 wasm_flags = wasm.to_options(); 1186 opts_flags = opts.to_options(); 1187 } else { 1188 codegen_flags = codegen_raw 1189 .iter() 1190 .flat_map(|t| t.0.iter()) 1191 .cloned() 1192 .collect(); 1193 debug_flags = debug_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1194 wasi_flags = wasi_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1195 wasm_flags = wasm_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1196 opts_flags = opts_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1197 } 1198 1199 for flag in codegen_flags { 1200 write!(f, "-C{flag} ")?; 1201 } 1202 for flag in opts_flags { 1203 write!(f, "-O{flag} ")?; 1204 } 1205 for flag in wasi_flags { 1206 write!(f, "-S{flag} ")?; 1207 } 1208 for flag in wasm_flags { 1209 write!(f, "-W{flag} ")?; 1210 } 1211 for flag in debug_flags { 1212 write!(f, "-D{flag} ")?; 1213 } 1214 1215 Ok(()) 1216 } 1217 } 1218