1 //! Contains the common Wasmtime command line interface (CLI) flags. 2 3 use clap::Parser; 4 use serde::Deserialize; 5 use std::{ 6 fmt, fs, 7 path::{Path, PathBuf}, 8 time::Duration, 9 }; 10 use wasmtime::{Config, Result, bail, error::Context as _}; 11 12 pub mod opt; 13 14 #[cfg(feature = "logging")] 15 fn init_file_per_thread_logger(prefix: &'static str) { 16 file_per_thread_logger::initialize(prefix); 17 file_per_thread_logger::allow_uninitialized(); 18 19 // Extending behavior of default spawner: 20 // https://docs.rs/rayon/1.1.0/rayon/struct.ThreadPoolBuilder.html#method.spawn_handler 21 // Source code says DefaultSpawner is implementation detail and 22 // shouldn't be used directly. 23 #[cfg(feature = "parallel-compilation")] 24 rayon::ThreadPoolBuilder::new() 25 .spawn_handler(move |thread| { 26 let mut b = std::thread::Builder::new(); 27 if let Some(name) = thread.name() { 28 b = b.name(name.to_owned()); 29 } 30 if let Some(stack_size) = thread.stack_size() { 31 b = b.stack_size(stack_size); 32 } 33 b.spawn(move || { 34 file_per_thread_logger::initialize(prefix); 35 thread.run() 36 })?; 37 Ok(()) 38 }) 39 .build_global() 40 .unwrap(); 41 } 42 43 wasmtime_option_group! { 44 #[derive(PartialEq, Clone, Deserialize)] 45 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 46 pub struct OptimizeOptions { 47 /// Optimization level of generated code (0-2, s; default: 2) 48 #[serde(default)] 49 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 50 pub opt_level: Option<wasmtime::OptLevel>, 51 52 /// Register allocator algorithm choice. 53 #[serde(default)] 54 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 55 pub regalloc_algorithm: Option<wasmtime::RegallocAlgorithm>, 56 57 /// Do not allow Wasm linear memories to move in the host process's 58 /// address space. 59 pub memory_may_move: Option<bool>, 60 61 /// Initial virtual memory allocation size for memories. 62 pub memory_reservation: Option<u64>, 63 64 /// Bytes to reserve at the end of linear memory for growth into. 65 pub memory_reservation_for_growth: Option<u64>, 66 67 /// Size, in bytes, of guard pages for linear memories. 68 pub memory_guard_size: Option<u64>, 69 70 /// Indicates whether an unmapped region of memory is placed before all 71 /// linear memories. 72 pub guard_before_linear_memory: Option<bool>, 73 74 /// Whether to initialize tables lazily, so that instantiation is 75 /// fast but indirect calls are a little slower. If no, tables are 76 /// initialized eagerly from any active element segments that apply to 77 /// them during instantiation. (default: yes) 78 pub table_lazy_init: Option<bool>, 79 80 /// Enable the pooling allocator, in place of the on-demand allocator. 81 pub pooling_allocator: Option<bool>, 82 83 /// The number of decommits to do per batch. A batch size of 1 84 /// effectively disables decommit batching. (default: 1) 85 pub pooling_decommit_batch_size: Option<usize>, 86 87 /// How many bytes to keep resident between instantiations for the 88 /// pooling allocator in linear memories. 89 pub pooling_memory_keep_resident: Option<usize>, 90 91 /// How many bytes to keep resident between instantiations for the 92 /// pooling allocator in tables. 93 pub pooling_table_keep_resident: Option<usize>, 94 95 /// Enable memory protection keys for the pooling allocator; this can 96 /// optimize the size of memory slots. 97 #[serde(default)] 98 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 99 pub pooling_memory_protection_keys: Option<wasmtime::Enabled>, 100 101 /// Sets an upper limit on how many memory protection keys (MPK) Wasmtime 102 /// will use. (default: 16) 103 pub pooling_max_memory_protection_keys: Option<usize>, 104 105 /// Configure attempting to initialize linear memory via a 106 /// copy-on-write mapping (default: yes) 107 pub memory_init_cow: Option<bool>, 108 109 /// Threshold below which CoW images are guaranteed to be used and be 110 /// dense. 111 pub memory_guaranteed_dense_image_size: Option<u64>, 112 113 /// The maximum number of WebAssembly instances which can be created 114 /// with the pooling allocator. 115 pub pooling_total_core_instances: Option<u32>, 116 117 /// The maximum number of WebAssembly components which can be created 118 /// with the pooling allocator. 119 pub pooling_total_component_instances: Option<u32>, 120 121 /// The maximum number of WebAssembly memories which can be created with 122 /// the pooling allocator. 123 pub pooling_total_memories: Option<u32>, 124 125 /// The maximum number of WebAssembly tables which can be created with 126 /// the pooling allocator. 127 pub pooling_total_tables: Option<u32>, 128 129 /// The maximum number of WebAssembly stacks which can be created with 130 /// the pooling allocator. 131 pub pooling_total_stacks: Option<u32>, 132 133 /// The maximum runtime size of each linear memory in the pooling 134 /// allocator, in bytes. 135 pub pooling_max_memory_size: Option<usize>, 136 137 /// The maximum table elements for any table defined in a module when 138 /// using the pooling allocator. 139 pub pooling_table_elements: Option<usize>, 140 141 /// The maximum size, in bytes, allocated for a core instance's metadata 142 /// when using the pooling allocator. 143 pub pooling_max_core_instance_size: Option<usize>, 144 145 /// Configures the maximum number of "unused warm slots" to retain in the 146 /// pooling allocator. (default: 100) 147 pub pooling_max_unused_warm_slots: Option<u32>, 148 149 /// How much memory, in bytes, to keep resident for async stacks allocated 150 /// with the pooling allocator. (default: 0) 151 pub pooling_async_stack_keep_resident: Option<usize>, 152 153 /// The maximum size, in bytes, allocated for a component instance's 154 /// `VMComponentContext` metadata. (default: 1MiB) 155 pub pooling_max_component_instance_size: Option<usize>, 156 157 /// The maximum number of core instances a single component may contain 158 /// (default is unlimited). 159 pub pooling_max_core_instances_per_component: Option<u32>, 160 161 /// The maximum number of Wasm linear memories that a single component may 162 /// transitively contain (default is unlimited). 163 pub pooling_max_memories_per_component: Option<u32>, 164 165 /// The maximum number of tables that a single component may transitively 166 /// contain (default is unlimited). 167 pub pooling_max_tables_per_component: Option<u32>, 168 169 /// The maximum number of defined tables for a core module. (default: 1) 170 pub pooling_max_tables_per_module: Option<u32>, 171 172 /// The maximum number of defined linear memories for a module. (default: 1) 173 pub pooling_max_memories_per_module: Option<u32>, 174 175 /// The maximum number of concurrent GC heaps supported. (default: 1000) 176 pub pooling_total_gc_heaps: Option<u32>, 177 178 /// Enable or disable the use of host signal handlers for traps. 179 pub signals_based_traps: Option<bool>, 180 181 /// DEPRECATED: Use `-Cmemory-guard-size=N` instead. 182 pub dynamic_memory_guard_size: Option<u64>, 183 184 /// DEPRECATED: Use `-Cmemory-guard-size=N` instead. 185 pub static_memory_guard_size: Option<u64>, 186 187 /// DEPRECATED: Use `-Cmemory-may-move` instead. 188 pub static_memory_forced: Option<bool>, 189 190 /// DEPRECATED: Use `-Cmemory-reservation=N` instead. 191 pub static_memory_maximum_size: Option<u64>, 192 193 /// DEPRECATED: Use `-Cmemory-reservation-for-growth=N` instead. 194 pub dynamic_memory_reserved_for_growth: Option<u64>, 195 196 /// Whether or not `PAGEMAP_SCAN` ioctls are used to reset linear 197 /// memory. 198 #[serde(default)] 199 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 200 pub pooling_pagemap_scan: Option<wasmtime::Enabled>, 201 } 202 203 enum Optimize { 204 ... 205 } 206 } 207 208 wasmtime_option_group! { 209 #[derive(PartialEq, Clone, Deserialize)] 210 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 211 pub struct CodegenOptions { 212 /// Either `cranelift` or `winch`. 213 /// 214 /// Currently only `cranelift` and `winch` are supported, but not all 215 /// builds of Wasmtime have both built in. 216 #[serde(default)] 217 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 218 pub compiler: Option<wasmtime::Strategy>, 219 /// Which garbage collector to use: `drc` or `null`. 220 /// 221 /// `drc` is the deferred reference-counting collector. 222 /// 223 /// `null` is the null garbage collector, which does not collect any 224 /// garbage. 225 /// 226 /// Note that not all builds of Wasmtime will have support for garbage 227 /// collection included. 228 #[serde(default)] 229 #[serde(deserialize_with = "crate::opt::cli_parse_wrapper")] 230 pub collector: Option<wasmtime::Collector>, 231 /// Enable Cranelift's internal debug verifier (expensive) 232 pub cranelift_debug_verifier: Option<bool>, 233 /// Whether or not to enable caching of compiled modules. 234 pub cache: Option<bool>, 235 /// Configuration for compiled module caching. 236 pub cache_config: Option<String>, 237 /// Whether or not to enable parallel compilation of modules. 238 pub parallel_compilation: Option<bool>, 239 /// Whether to enable proof-carrying code (PCC)-based validation. 240 pub pcc: Option<bool>, 241 /// Controls whether native unwind information is present in compiled 242 /// object files. 243 pub native_unwind_info: Option<bool>, 244 245 /// Whether to perform function inlining during compilation. 246 pub inlining: Option<bool>, 247 248 #[prefixed = "cranelift"] 249 #[serde(default)] 250 /// Set a cranelift-specific option. Use `wasmtime settings` to see 251 /// all. 252 pub cranelift: Vec<(String, Option<String>)>, 253 } 254 255 enum Codegen { 256 ... 257 } 258 } 259 260 wasmtime_option_group! { 261 #[derive(PartialEq, Clone, Deserialize)] 262 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 263 pub struct DebugOptions { 264 /// Enable generation of DWARF debug information in compiled code. 265 pub debug_info: Option<bool>, 266 /// Enable guest debugging insrumentation. 267 pub guest_debug: Option<bool>, 268 /// Configure whether compiled code can map native addresses to wasm. 269 pub address_map: Option<bool>, 270 /// Configure whether logging is enabled. 271 pub logging: Option<bool>, 272 /// Configure whether logs are emitted to files 273 pub log_to_files: Option<bool>, 274 /// Enable coredump generation to this file after a WebAssembly trap. 275 pub coredump: Option<String>, 276 } 277 278 enum Debug { 279 ... 280 } 281 } 282 283 wasmtime_option_group! { 284 #[derive(PartialEq, Clone, Deserialize)] 285 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 286 pub struct WasmOptions { 287 /// Enable canonicalization of all NaN values. 288 pub nan_canonicalization: Option<bool>, 289 /// Enable execution fuel with N units fuel, trapping after running out 290 /// of fuel. 291 /// 292 /// Most WebAssembly instructions consume 1 unit of fuel. Some 293 /// instructions, such as `nop`, `drop`, `block`, and `loop`, consume 0 294 /// units, as any execution cost associated with them involves other 295 /// instructions which do consume fuel. 296 pub fuel: Option<u64>, 297 /// Yield when a global epoch counter changes, allowing for async 298 /// operation without blocking the executor. 299 pub epoch_interruption: Option<bool>, 300 /// Maximum stack size, in bytes, that wasm is allowed to consume before a 301 /// stack overflow is reported. 302 pub max_wasm_stack: Option<usize>, 303 /// Stack size, in bytes, that will be allocated for async stacks. 304 /// 305 /// Note that this must be larger than `max-wasm-stack` and the 306 /// difference between the two is how much stack the host has to execute 307 /// on. 308 pub async_stack_size: Option<usize>, 309 /// Configures whether or not stacks used for async futures are zeroed 310 /// before (re)use as a defense-in-depth mechanism. (default: false) 311 pub async_stack_zeroing: Option<bool>, 312 /// Allow unknown exports when running commands. 313 pub unknown_exports_allow: Option<bool>, 314 /// Allow the main module to import unknown functions, using an 315 /// implementation that immediately traps, when running commands. 316 pub unknown_imports_trap: Option<bool>, 317 /// Allow the main module to import unknown functions, using an 318 /// implementation that returns default values, when running commands. 319 pub unknown_imports_default: Option<bool>, 320 /// Enables memory error checking. (see wmemcheck.md for more info) 321 pub wmemcheck: Option<bool>, 322 /// Maximum size, in bytes, that a linear memory is allowed to reach. 323 /// 324 /// Growth beyond this limit will cause `memory.grow` instructions in 325 /// WebAssembly modules to return -1 and fail. 326 pub max_memory_size: Option<usize>, 327 /// Maximum size, in table elements, that a table is allowed to reach. 328 pub max_table_elements: Option<usize>, 329 /// Maximum number of WebAssembly instances allowed to be created. 330 pub max_instances: Option<usize>, 331 /// Maximum number of WebAssembly tables allowed to be created. 332 pub max_tables: Option<usize>, 333 /// Maximum number of WebAssembly linear memories allowed to be created. 334 pub max_memories: Option<usize>, 335 /// Force a trap to be raised on `memory.grow` and `table.grow` failure 336 /// instead of returning -1 from these instructions. 337 /// 338 /// This is not necessarily a spec-compliant option to enable but can be 339 /// useful for tracking down a backtrace of what is requesting so much 340 /// memory, for example. 341 pub trap_on_grow_failure: Option<bool>, 342 /// Maximum execution time of wasm code before timing out (1, 2s, 100ms, etc) 343 pub timeout: Option<Duration>, 344 /// Configures support for all WebAssembly proposals implemented. 345 pub all_proposals: Option<bool>, 346 /// Configure support for the bulk memory proposal. 347 pub bulk_memory: Option<bool>, 348 /// Configure support for the multi-memory proposal. 349 pub multi_memory: Option<bool>, 350 /// Configure support for the multi-value proposal. 351 pub multi_value: Option<bool>, 352 /// Configure support for the reference-types proposal. 353 pub reference_types: Option<bool>, 354 /// Configure support for the simd proposal. 355 pub simd: Option<bool>, 356 /// Configure support for the relaxed-simd proposal. 357 pub relaxed_simd: Option<bool>, 358 /// Configure forcing deterministic and host-independent behavior of 359 /// the relaxed-simd instructions. 360 /// 361 /// By default these instructions may have architecture-specific behavior as 362 /// allowed by the specification, but this can be used to force the behavior 363 /// of these instructions to match the deterministic behavior classified in 364 /// the specification. Note that enabling this option may come at a 365 /// performance cost. 366 pub relaxed_simd_deterministic: Option<bool>, 367 /// Configure support for the tail-call proposal. 368 pub tail_call: Option<bool>, 369 /// Configure support for the threads proposal. 370 pub threads: Option<bool>, 371 /// Configure the ability to create a `shared` memory. 372 pub shared_memory: Option<bool>, 373 /// Configure support for the shared-everything-threads proposal. 374 pub shared_everything_threads: Option<bool>, 375 /// Configure support for the memory64 proposal. 376 pub memory64: Option<bool>, 377 /// Configure support for the component-model proposal. 378 pub component_model: Option<bool>, 379 /// Component model support for async lifting/lowering. 380 pub component_model_async: Option<bool>, 381 /// Component model support for async lifting/lowering: this corresponds 382 /// to the �� emoji in the component model specification. 383 pub component_model_async_builtins: Option<bool>, 384 /// Component model support for async lifting/lowering: this corresponds 385 /// to the �� emoji in the component model specification. 386 pub component_model_async_stackful: Option<bool>, 387 /// Component model support for threading: this corresponds 388 /// to the �� emoji in the component model specification. 389 pub component_model_threading: Option<bool>, 390 /// Component model support for `error-context`: this corresponds 391 /// to the �� emoji in the component model specification. 392 pub component_model_error_context: Option<bool>, 393 /// GC support in the component model: this corresponds to the �� emoji 394 /// in the component model specification. 395 pub component_model_gc: Option<bool>, 396 /// Configure support for the function-references proposal. 397 pub function_references: Option<bool>, 398 /// Configure support for the stack-switching proposal. 399 pub stack_switching: Option<bool>, 400 /// Configure support for the GC proposal. 401 pub gc: Option<bool>, 402 /// Configure support for the custom-page-sizes proposal. 403 pub custom_page_sizes: Option<bool>, 404 /// Configure support for the wide-arithmetic proposal. 405 pub wide_arithmetic: Option<bool>, 406 /// Configure support for the extended-const proposal. 407 pub extended_const: Option<bool>, 408 /// Configure support for the exceptions proposal. 409 pub exceptions: Option<bool>, 410 /// Whether or not any GC infrastructure in Wasmtime is enabled or not. 411 pub gc_support: Option<bool>, 412 /// Component model support for fixed-length lists: this corresponds 413 /// to the �� emoji in the component model specification 414 pub component_model_fixed_length_lists: Option<bool>, 415 /// Whether or not any concurrency infrastructure in Wasmtime is 416 /// enabled or not. 417 pub concurrency_support: Option<bool>, 418 } 419 420 enum Wasm { 421 ... 422 } 423 } 424 425 wasmtime_option_group! { 426 #[derive(PartialEq, Clone, Deserialize)] 427 #[serde(rename_all = "kebab-case", deny_unknown_fields)] 428 pub struct WasiOptions { 429 /// Enable support for WASI CLI APIs, including filesystems, sockets, clocks, and random. 430 pub cli: Option<bool>, 431 /// Enable WASI APIs marked as: @unstable(feature = cli-exit-with-code) 432 pub cli_exit_with_code: Option<bool>, 433 /// Deprecated alias for `cli` 434 pub common: Option<bool>, 435 /// Enable support for WASI neural network imports (experimental) 436 pub nn: Option<bool>, 437 /// Enable support for WASI threading imports (experimental). Implies preview2=false. 438 pub threads: Option<bool>, 439 /// Enable support for WASI HTTP imports 440 pub http: Option<bool>, 441 /// Number of distinct write calls to the outgoing body's output-stream 442 /// that the implementation will buffer. 443 /// Default: 1. 444 pub http_outgoing_body_buffer_chunks: Option<usize>, 445 /// Maximum size allowed in a write call to the outgoing body's output-stream. 446 /// Default: 1024 * 1024. 447 pub http_outgoing_body_chunk_size: Option<usize>, 448 /// Enable support for WASI config imports (experimental) 449 pub config: Option<bool>, 450 /// Enable support for WASI key-value imports (experimental) 451 pub keyvalue: Option<bool>, 452 /// Inherit environment variables and file descriptors following the 453 /// systemd listen fd specification (UNIX only) (legacy wasip1 454 /// implementation only) 455 pub listenfd: Option<bool>, 456 /// Grant access to the given TCP listen socket (experimental, legacy 457 /// wasip1 implementation only) 458 #[serde(default)] 459 pub tcplisten: Vec<String>, 460 /// Enable support for WASI TLS (Transport Layer Security) imports (experimental) 461 pub tls: Option<bool>, 462 /// Implement WASI Preview1 using new Preview2 implementation (true, default) or legacy 463 /// implementation (false) 464 pub preview2: Option<bool>, 465 /// Pre-load machine learning graphs (i.e., models) for use by wasi-nn. 466 /// 467 /// Each use of the flag will preload a ML model from the host directory 468 /// using the given model encoding. The model will be mapped to the 469 /// directory name: e.g., `--wasi-nn-graph openvino:/foo/bar` will preload 470 /// an OpenVINO model named `bar`. Note that which model encodings are 471 /// available is dependent on the backends implemented in the 472 /// `wasmtime_wasi_nn` crate. 473 #[serde(skip)] 474 pub nn_graph: Vec<WasiNnGraph>, 475 /// Flag for WASI preview2 to inherit the host's network within the 476 /// guest so it has full access to all addresses/ports/etc. 477 pub inherit_network: Option<bool>, 478 /// Indicates whether `wasi:sockets/ip-name-lookup` is enabled or not. 479 pub allow_ip_name_lookup: Option<bool>, 480 /// Indicates whether `wasi:sockets` TCP support is enabled or not. 481 pub tcp: Option<bool>, 482 /// Indicates whether `wasi:sockets` UDP support is enabled or not. 483 pub udp: Option<bool>, 484 /// Enable WASI APIs marked as: @unstable(feature = network-error-code) 485 pub network_error_code: Option<bool>, 486 /// Allows imports from the `wasi_unstable` core wasm module. 487 pub preview0: Option<bool>, 488 /// Inherit all environment variables from the parent process. 489 /// 490 /// This option can be further overwritten with `--env` flags. 491 pub inherit_env: Option<bool>, 492 /// Pass a wasi config variable to the program. 493 #[serde(skip)] 494 pub config_var: Vec<KeyValuePair>, 495 /// Preset data for the In-Memory provider of WASI key-value API. 496 #[serde(skip)] 497 pub keyvalue_in_memory_data: Vec<KeyValuePair>, 498 /// Enable support for WASIp3 APIs. 499 pub p3: Option<bool>, 500 } 501 502 enum Wasi { 503 ... 504 } 505 } 506 507 #[derive(Debug, Clone, PartialEq)] 508 pub struct WasiNnGraph { 509 pub format: String, 510 pub dir: String, 511 } 512 513 #[derive(Debug, Clone, PartialEq)] 514 pub struct KeyValuePair { 515 pub key: String, 516 pub value: String, 517 } 518 519 /// Common options for commands that translate WebAssembly modules 520 #[derive(Parser, Clone, Deserialize)] 521 #[serde(deny_unknown_fields)] 522 pub struct CommonOptions { 523 // These options groups are used to parse `-O` and such options but aren't 524 // the raw form consumed by the CLI. Instead they're pushed into the `pub` 525 // fields below as part of the `configure` method. 526 // 527 // Ideally clap would support `pub opts: OptimizeOptions` and parse directly 528 // into that but it does not appear to do so for multiple `-O` flags for 529 // now. 530 /// Optimization and tuning related options for wasm performance, `-O help` to 531 /// see all. 532 #[arg(short = 'O', long = "optimize", value_name = "KEY[=VAL[,..]]")] 533 #[serde(skip)] 534 opts_raw: Vec<opt::CommaSeparated<Optimize>>, 535 536 /// Codegen-related configuration options, `-C help` to see all. 537 #[arg(short = 'C', long = "codegen", value_name = "KEY[=VAL[,..]]")] 538 #[serde(skip)] 539 codegen_raw: Vec<opt::CommaSeparated<Codegen>>, 540 541 /// Debug-related configuration options, `-D help` to see all. 542 #[arg(short = 'D', long = "debug", value_name = "KEY[=VAL[,..]]")] 543 #[serde(skip)] 544 debug_raw: Vec<opt::CommaSeparated<Debug>>, 545 546 /// Options for configuring semantic execution of WebAssembly, `-W help` to see 547 /// all. 548 #[arg(short = 'W', long = "wasm", value_name = "KEY[=VAL[,..]]")] 549 #[serde(skip)] 550 wasm_raw: Vec<opt::CommaSeparated<Wasm>>, 551 552 /// Options for configuring WASI and its proposals, `-S help` to see all. 553 #[arg(short = 'S', long = "wasi", value_name = "KEY[=VAL[,..]]")] 554 #[serde(skip)] 555 wasi_raw: Vec<opt::CommaSeparated<Wasi>>, 556 557 // These fields are filled in by the `configure` method below via the 558 // options parsed from the CLI above. This is what the CLI should use. 559 #[arg(skip)] 560 #[serde(skip)] 561 configured: bool, 562 563 #[arg(skip)] 564 #[serde(rename = "optimize", default)] 565 pub opts: OptimizeOptions, 566 567 #[arg(skip)] 568 #[serde(rename = "codegen", default)] 569 pub codegen: CodegenOptions, 570 571 #[arg(skip)] 572 #[serde(rename = "debug", default)] 573 pub debug: DebugOptions, 574 575 #[arg(skip)] 576 #[serde(rename = "wasm", default)] 577 pub wasm: WasmOptions, 578 579 #[arg(skip)] 580 #[serde(rename = "wasi", default)] 581 pub wasi: WasiOptions, 582 583 /// The target triple; default is the host triple 584 #[arg(long, value_name = "TARGET")] 585 #[serde(skip)] 586 pub target: Option<String>, 587 588 /// Use the specified TOML configuration file. 589 /// This TOML configuration file can provide same configuration options as the 590 /// `--optimize`, `--codgen`, `--debug`, `--wasm`, `--wasi` CLI options, with a couple exceptions. 591 /// 592 /// Additional options specified on the command line will take precedent over options loaded from 593 /// this TOML file. 594 #[arg(long = "config", value_name = "FILE")] 595 #[serde(skip)] 596 pub config: Option<PathBuf>, 597 } 598 599 macro_rules! match_feature { 600 ( 601 [$feat:tt : $config:expr] 602 $val:ident => $e:expr, 603 $p:pat => err, 604 ) => { 605 #[cfg(feature = $feat)] 606 { 607 if let Some($val) = $config { 608 $e; 609 } 610 } 611 #[cfg(not(feature = $feat))] 612 { 613 if let Some($p) = $config { 614 bail!(concat!("support for ", $feat, " disabled at compile time")); 615 } 616 } 617 }; 618 } 619 620 impl CommonOptions { 621 /// Creates a blank new set of [`CommonOptions`] that can be configured. 622 pub fn new() -> CommonOptions { 623 CommonOptions { 624 opts_raw: Vec::new(), 625 codegen_raw: Vec::new(), 626 debug_raw: Vec::new(), 627 wasm_raw: Vec::new(), 628 wasi_raw: Vec::new(), 629 configured: true, 630 opts: Default::default(), 631 codegen: Default::default(), 632 debug: Default::default(), 633 wasm: Default::default(), 634 wasi: Default::default(), 635 target: None, 636 config: None, 637 } 638 } 639 640 fn configure(&mut self) -> Result<()> { 641 if self.configured { 642 return Ok(()); 643 } 644 self.configured = true; 645 if let Some(toml_config_path) = &self.config { 646 let toml_options = CommonOptions::from_file(toml_config_path)?; 647 self.opts = toml_options.opts; 648 self.codegen = toml_options.codegen; 649 self.debug = toml_options.debug; 650 self.wasm = toml_options.wasm; 651 self.wasi = toml_options.wasi; 652 } 653 self.opts.configure_with(&self.opts_raw); 654 self.codegen.configure_with(&self.codegen_raw); 655 self.debug.configure_with(&self.debug_raw); 656 self.wasm.configure_with(&self.wasm_raw); 657 self.wasi.configure_with(&self.wasi_raw); 658 Ok(()) 659 } 660 661 pub fn init_logging(&mut self) -> Result<()> { 662 self.configure()?; 663 if self.debug.logging == Some(false) { 664 return Ok(()); 665 } 666 #[cfg(feature = "logging")] 667 if self.debug.log_to_files == Some(true) { 668 let prefix = "wasmtime.dbg."; 669 init_file_per_thread_logger(prefix); 670 } else { 671 use std::io::IsTerminal; 672 use tracing_subscriber::{EnvFilter, FmtSubscriber}; 673 let builder = FmtSubscriber::builder() 674 .with_writer(std::io::stderr) 675 .with_env_filter(EnvFilter::from_env("WASMTIME_LOG")) 676 .with_ansi(std::io::stderr().is_terminal()); 677 if std::env::var("WASMTIME_LOG_NO_CONTEXT").is_ok_and(|value| value.eq("1")) { 678 builder 679 .with_level(false) 680 .with_target(false) 681 .without_time() 682 .init() 683 } else { 684 builder.init(); 685 } 686 } 687 #[cfg(not(feature = "logging"))] 688 if self.debug.log_to_files == Some(true) || self.debug.logging == Some(true) { 689 bail!("support for logging disabled at compile time"); 690 } 691 Ok(()) 692 } 693 694 pub fn config(&mut self, pooling_allocator_default: Option<bool>) -> Result<Config> { 695 self.configure()?; 696 let mut config = Config::new(); 697 698 match_feature! { 699 ["cranelift" : self.codegen.compiler] 700 strategy => config.strategy(strategy), 701 _ => err, 702 } 703 match_feature! { 704 ["gc" : self.codegen.collector] 705 collector => config.collector(collector), 706 _ => err, 707 } 708 if let Some(target) = &self.target { 709 config.target(target)?; 710 } 711 match_feature! { 712 ["cranelift" : self.codegen.cranelift_debug_verifier] 713 enable => config.cranelift_debug_verifier(enable), 714 true => err, 715 } 716 if let Some(enable) = self.debug.debug_info { 717 config.debug_info(enable); 718 } 719 match_feature! { 720 ["debug" : self.debug.guest_debug] 721 enable => config.guest_debug(enable), 722 _ => err, 723 } 724 if self.debug.coredump.is_some() { 725 #[cfg(feature = "coredump")] 726 config.coredump_on_trap(true); 727 #[cfg(not(feature = "coredump"))] 728 bail!("support for coredumps disabled at compile time"); 729 } 730 match_feature! { 731 ["cranelift" : self.opts.opt_level] 732 level => config.cranelift_opt_level(level), 733 _ => err, 734 } 735 match_feature! { 736 ["cranelift": self.opts.regalloc_algorithm] 737 algo => config.cranelift_regalloc_algorithm(algo), 738 _ => err, 739 } 740 match_feature! { 741 ["cranelift" : self.wasm.nan_canonicalization] 742 enable => config.cranelift_nan_canonicalization(enable), 743 true => err, 744 } 745 match_feature! { 746 ["cranelift" : self.codegen.pcc] 747 enable => config.cranelift_pcc(enable), 748 true => err, 749 } 750 751 self.enable_wasm_features(&mut config)?; 752 753 #[cfg(feature = "cranelift")] 754 for (name, value) in self.codegen.cranelift.iter() { 755 let name = name.replace('-', "_"); 756 unsafe { 757 match value { 758 Some(val) => { 759 config.cranelift_flag_set(&name, val); 760 } 761 None => { 762 config.cranelift_flag_enable(&name); 763 } 764 } 765 } 766 } 767 #[cfg(not(feature = "cranelift"))] 768 if !self.codegen.cranelift.is_empty() { 769 bail!("support for cranelift disabled at compile time"); 770 } 771 772 #[cfg(feature = "cache")] 773 if self.codegen.cache != Some(false) { 774 use wasmtime::Cache; 775 let cache = match &self.codegen.cache_config { 776 Some(path) => Cache::from_file(Some(Path::new(path)))?, 777 None => Cache::from_file(None)?, 778 }; 779 config.cache(Some(cache)); 780 } 781 #[cfg(not(feature = "cache"))] 782 if self.codegen.cache == Some(true) { 783 bail!("support for caching disabled at compile time"); 784 } 785 786 match_feature! { 787 ["parallel-compilation" : self.codegen.parallel_compilation] 788 enable => config.parallel_compilation(enable), 789 true => err, 790 } 791 792 let memory_reservation = self 793 .opts 794 .memory_reservation 795 .or(self.opts.static_memory_maximum_size); 796 if let Some(size) = memory_reservation { 797 config.memory_reservation(size); 798 } 799 800 if let Some(enable) = self.opts.static_memory_forced { 801 config.memory_may_move(!enable); 802 } 803 if let Some(enable) = self.opts.memory_may_move { 804 config.memory_may_move(enable); 805 } 806 807 let memory_guard_size = self 808 .opts 809 .static_memory_guard_size 810 .or(self.opts.dynamic_memory_guard_size) 811 .or(self.opts.memory_guard_size); 812 if let Some(size) = memory_guard_size { 813 config.memory_guard_size(size); 814 } 815 816 let mem_for_growth = self 817 .opts 818 .memory_reservation_for_growth 819 .or(self.opts.dynamic_memory_reserved_for_growth); 820 if let Some(size) = mem_for_growth { 821 config.memory_reservation_for_growth(size); 822 } 823 if let Some(enable) = self.opts.guard_before_linear_memory { 824 config.guard_before_linear_memory(enable); 825 } 826 if let Some(enable) = self.opts.table_lazy_init { 827 config.table_lazy_init(enable); 828 } 829 830 // If fuel has been configured, set the `consume fuel` flag on the config. 831 if self.wasm.fuel.is_some() { 832 config.consume_fuel(true); 833 } 834 835 if let Some(enable) = self.wasm.epoch_interruption { 836 config.epoch_interruption(enable); 837 } 838 if let Some(enable) = self.debug.address_map { 839 config.generate_address_map(enable); 840 } 841 if let Some(enable) = self.opts.memory_init_cow { 842 config.memory_init_cow(enable); 843 } 844 if let Some(size) = self.opts.memory_guaranteed_dense_image_size { 845 config.memory_guaranteed_dense_image_size(size); 846 } 847 if let Some(enable) = self.opts.signals_based_traps { 848 config.signals_based_traps(enable); 849 } 850 if let Some(enable) = self.codegen.native_unwind_info { 851 config.native_unwind_info(enable); 852 } 853 if let Some(enable) = self.codegen.inlining { 854 config.compiler_inlining(enable); 855 } 856 857 // async_stack_size enabled by either async or stack-switching, so 858 // cannot directly use match_feature! 859 #[cfg(any(feature = "async", feature = "stack-switching"))] 860 { 861 if let Some(size) = self.wasm.async_stack_size { 862 config.async_stack_size(size); 863 } 864 } 865 #[cfg(not(any(feature = "async", feature = "stack-switching")))] 866 { 867 if let Some(_size) = self.wasm.async_stack_size { 868 bail!(concat!( 869 "support for async/stack-switching disabled at compile time" 870 )); 871 } 872 } 873 874 match_feature! { 875 ["pooling-allocator" : self.opts.pooling_allocator.or(pooling_allocator_default)] 876 enable => { 877 if enable { 878 let mut cfg = wasmtime::PoolingAllocationConfig::default(); 879 if let Some(size) = self.opts.pooling_memory_keep_resident { 880 cfg.linear_memory_keep_resident(size); 881 } 882 if let Some(size) = self.opts.pooling_table_keep_resident { 883 cfg.table_keep_resident(size); 884 } 885 if let Some(limit) = self.opts.pooling_total_core_instances { 886 cfg.total_core_instances(limit); 887 } 888 if let Some(limit) = self.opts.pooling_total_component_instances { 889 cfg.total_component_instances(limit); 890 } 891 if let Some(limit) = self.opts.pooling_total_memories { 892 cfg.total_memories(limit); 893 } 894 if let Some(limit) = self.opts.pooling_total_tables { 895 cfg.total_tables(limit); 896 } 897 if let Some(limit) = self.opts.pooling_table_elements 898 .or(self.wasm.max_table_elements) 899 { 900 cfg.table_elements(limit); 901 } 902 if let Some(limit) = self.opts.pooling_max_core_instance_size { 903 cfg.max_core_instance_size(limit); 904 } 905 match_feature! { 906 ["async" : self.opts.pooling_total_stacks] 907 limit => cfg.total_stacks(limit), 908 _ => err, 909 } 910 if let Some(max) = self.opts.pooling_max_memory_size 911 .or(self.wasm.max_memory_size) 912 { 913 cfg.max_memory_size(max); 914 } 915 if let Some(size) = self.opts.pooling_decommit_batch_size { 916 cfg.decommit_batch_size(size); 917 } 918 if let Some(max) = self.opts.pooling_max_unused_warm_slots { 919 cfg.max_unused_warm_slots(max); 920 } 921 match_feature! { 922 ["async" : self.opts.pooling_async_stack_keep_resident] 923 size => cfg.async_stack_keep_resident(size), 924 _ => err, 925 } 926 if let Some(max) = self.opts.pooling_max_component_instance_size { 927 cfg.max_component_instance_size(max); 928 } 929 if let Some(max) = self.opts.pooling_max_core_instances_per_component { 930 cfg.max_core_instances_per_component(max); 931 } 932 if let Some(max) = self.opts.pooling_max_memories_per_component { 933 cfg.max_memories_per_component(max); 934 } 935 if let Some(max) = self.opts.pooling_max_tables_per_component { 936 cfg.max_tables_per_component(max); 937 } 938 if let Some(max) = self.opts.pooling_max_tables_per_module { 939 cfg.max_tables_per_module(max); 940 } 941 if let Some(max) = self.opts.pooling_max_memories_per_module { 942 cfg.max_memories_per_module(max); 943 } 944 match_feature! { 945 ["memory-protection-keys" : self.opts.pooling_memory_protection_keys] 946 enable => cfg.memory_protection_keys(enable), 947 _ => err, 948 } 949 match_feature! { 950 ["memory-protection-keys" : self.opts.pooling_max_memory_protection_keys] 951 max => cfg.max_memory_protection_keys(max), 952 _ => err, 953 } 954 match_feature! { 955 ["gc" : self.opts.pooling_total_gc_heaps] 956 max => cfg.total_gc_heaps(max), 957 _ => err, 958 } 959 if let Some(enabled) = self.opts.pooling_pagemap_scan { 960 cfg.pagemap_scan(enabled); 961 } 962 config.allocation_strategy(wasmtime::InstanceAllocationStrategy::Pooling(cfg)); 963 } 964 }, 965 true => err, 966 } 967 968 if self.opts.pooling_memory_protection_keys.is_some() 969 && !self.opts.pooling_allocator.unwrap_or(false) 970 { 971 bail!("memory protection keys require the pooling allocator"); 972 } 973 974 if self.opts.pooling_max_memory_protection_keys.is_some() 975 && !self.opts.pooling_memory_protection_keys.is_some() 976 { 977 bail!("max memory protection keys requires memory protection keys to be enabled"); 978 } 979 980 match_feature! { 981 ["async" : self.wasm.async_stack_zeroing] 982 enable => config.async_stack_zeroing(enable), 983 _ => err, 984 } 985 986 if let Some(max) = self.wasm.max_wasm_stack { 987 config.max_wasm_stack(max); 988 989 // If `-Wasync-stack-size` isn't passed then automatically adjust it 990 // to the wasm stack size provided here too. That prevents the need 991 // to pass both when one can generally be inferred from the other. 992 #[cfg(any(feature = "async", feature = "stack-switching"))] 993 if self.wasm.async_stack_size.is_none() { 994 const DEFAULT_HOST_STACK: usize = 512 << 10; 995 config.async_stack_size(max + DEFAULT_HOST_STACK); 996 } 997 } 998 999 if let Some(enable) = self.wasm.relaxed_simd_deterministic { 1000 config.relaxed_simd_deterministic(enable); 1001 } 1002 match_feature! { 1003 ["cranelift" : self.wasm.wmemcheck] 1004 enable => config.wmemcheck(enable), 1005 true => err, 1006 } 1007 1008 if let Some(enable) = self.wasm.gc_support { 1009 config.gc_support(enable); 1010 } 1011 1012 if let Some(enable) = self.wasm.concurrency_support { 1013 config.concurrency_support(enable); 1014 } 1015 1016 if let Some(enable) = self.wasm.shared_memory { 1017 config.shared_memory(enable); 1018 } 1019 1020 Ok(config) 1021 } 1022 1023 pub fn enable_wasm_features(&self, config: &mut Config) -> Result<()> { 1024 let all = self.wasm.all_proposals; 1025 1026 if let Some(enable) = self.wasm.simd.or(all) { 1027 config.wasm_simd(enable); 1028 } 1029 if let Some(enable) = self.wasm.relaxed_simd.or(all) { 1030 config.wasm_relaxed_simd(enable); 1031 } 1032 if let Some(enable) = self.wasm.bulk_memory.or(all) { 1033 config.wasm_bulk_memory(enable); 1034 } 1035 if let Some(enable) = self.wasm.multi_value.or(all) { 1036 config.wasm_multi_value(enable); 1037 } 1038 if let Some(enable) = self.wasm.tail_call.or(all) { 1039 config.wasm_tail_call(enable); 1040 } 1041 if let Some(enable) = self.wasm.multi_memory.or(all) { 1042 config.wasm_multi_memory(enable); 1043 } 1044 if let Some(enable) = self.wasm.memory64.or(all) { 1045 config.wasm_memory64(enable); 1046 } 1047 if let Some(enable) = self.wasm.stack_switching { 1048 config.wasm_stack_switching(enable); 1049 } 1050 if let Some(enable) = self.wasm.custom_page_sizes.or(all) { 1051 config.wasm_custom_page_sizes(enable); 1052 } 1053 if let Some(enable) = self.wasm.wide_arithmetic.or(all) { 1054 config.wasm_wide_arithmetic(enable); 1055 } 1056 if let Some(enable) = self.wasm.extended_const.or(all) { 1057 config.wasm_extended_const(enable); 1058 } 1059 1060 macro_rules! handle_conditionally_compiled { 1061 ($(($feature:tt, $field:tt, $method:tt))*) => ($( 1062 if let Some(enable) = self.wasm.$field.or(all) { 1063 #[cfg(feature = $feature)] 1064 config.$method(enable); 1065 #[cfg(not(feature = $feature))] 1066 if enable && all.is_none() { 1067 bail!("support for {} was disabled at compile-time", $feature); 1068 } 1069 } 1070 )*) 1071 } 1072 1073 handle_conditionally_compiled! { 1074 ("component-model", component_model, wasm_component_model) 1075 ("component-model-async", component_model_async, wasm_component_model_async) 1076 ("component-model-async", component_model_async_builtins, wasm_component_model_async_builtins) 1077 ("component-model-async", component_model_async_stackful, wasm_component_model_async_stackful) 1078 ("component-model-async", component_model_threading, wasm_component_model_threading) 1079 ("component-model", component_model_error_context, wasm_component_model_error_context) 1080 ("component-model", component_model_fixed_length_lists, wasm_component_model_fixed_length_lists) 1081 ("threads", threads, wasm_threads) 1082 ("gc", gc, wasm_gc) 1083 ("gc", reference_types, wasm_reference_types) 1084 ("gc", function_references, wasm_function_references) 1085 ("gc", exceptions, wasm_exceptions) 1086 ("stack-switching", stack_switching, wasm_stack_switching) 1087 } 1088 1089 if let Some(enable) = self.wasm.component_model_gc { 1090 #[cfg(all(feature = "component-model", feature = "gc"))] 1091 config.wasm_component_model_gc(enable); 1092 #[cfg(not(all(feature = "component-model", feature = "gc")))] 1093 if enable && all.is_none() { 1094 bail!("support for `component-model-gc` was disabled at compile time") 1095 } 1096 } 1097 1098 Ok(()) 1099 } 1100 1101 pub fn from_file<P: AsRef<Path>>(path: P) -> Result<Self> { 1102 let path_ref = path.as_ref(); 1103 let file_contents = fs::read_to_string(path_ref) 1104 .with_context(|| format!("failed to read config file: {path_ref:?}"))?; 1105 toml::from_str::<CommonOptions>(&file_contents) 1106 .with_context(|| format!("failed to parse TOML config file {path_ref:?}")) 1107 } 1108 } 1109 1110 #[cfg(test)] 1111 mod tests { 1112 use wasmtime::{OptLevel, RegallocAlgorithm}; 1113 1114 use super::*; 1115 1116 #[test] 1117 fn from_toml() { 1118 // empty toml 1119 let empty_toml = ""; 1120 let mut common_options: CommonOptions = toml::from_str(empty_toml).unwrap(); 1121 common_options.config(None).unwrap(); 1122 1123 // basic toml 1124 let basic_toml = r#" 1125 [optimize] 1126 [codegen] 1127 [debug] 1128 [wasm] 1129 [wasi] 1130 "#; 1131 let mut common_options: CommonOptions = toml::from_str(basic_toml).unwrap(); 1132 common_options.config(None).unwrap(); 1133 1134 // toml with custom deserialization to match CLI flag parsing 1135 for (opt_value, expected) in [ 1136 ("0", Some(OptLevel::None)), 1137 ("1", Some(OptLevel::Speed)), 1138 ("2", Some(OptLevel::Speed)), 1139 ("\"s\"", Some(OptLevel::SpeedAndSize)), 1140 ("\"hello\"", None), // should fail 1141 ("3", None), // should fail 1142 ] { 1143 let toml = format!( 1144 r#" 1145 [optimize] 1146 opt-level = {opt_value} 1147 "#, 1148 ); 1149 let parsed_opt_level = toml::from_str::<CommonOptions>(&toml) 1150 .ok() 1151 .and_then(|common_options| common_options.opts.opt_level); 1152 1153 assert_eq!( 1154 parsed_opt_level, expected, 1155 "Mismatch for input '{opt_value}'. Parsed: {parsed_opt_level:?}, Expected: {expected:?}" 1156 ); 1157 } 1158 1159 // Regalloc algorithm 1160 for (regalloc_value, expected) in [ 1161 ("\"backtracking\"", Some(RegallocAlgorithm::Backtracking)), 1162 ("\"single-pass\"", Some(RegallocAlgorithm::SinglePass)), 1163 ("\"hello\"", None), // should fail 1164 ("3", None), // should fail 1165 ("true", None), // should fail 1166 ] { 1167 let toml = format!( 1168 r#" 1169 [optimize] 1170 regalloc-algorithm = {regalloc_value} 1171 "#, 1172 ); 1173 let parsed_regalloc_algorithm = toml::from_str::<CommonOptions>(&toml) 1174 .ok() 1175 .and_then(|common_options| common_options.opts.regalloc_algorithm); 1176 assert_eq!( 1177 parsed_regalloc_algorithm, expected, 1178 "Mismatch for input '{regalloc_value}'. Parsed: {parsed_regalloc_algorithm:?}, Expected: {expected:?}" 1179 ); 1180 } 1181 1182 // Strategy 1183 for (strategy_value, expected) in [ 1184 ("\"cranelift\"", Some(wasmtime::Strategy::Cranelift)), 1185 ("\"winch\"", Some(wasmtime::Strategy::Winch)), 1186 ("\"hello\"", None), // should fail 1187 ("5", None), // should fail 1188 ("true", None), // should fail 1189 ] { 1190 let toml = format!( 1191 r#" 1192 [codegen] 1193 compiler = {strategy_value} 1194 "#, 1195 ); 1196 let parsed_strategy = toml::from_str::<CommonOptions>(&toml) 1197 .ok() 1198 .and_then(|common_options| common_options.codegen.compiler); 1199 assert_eq!( 1200 parsed_strategy, expected, 1201 "Mismatch for input '{strategy_value}'. Parsed: {parsed_strategy:?}, Expected: {expected:?}", 1202 ); 1203 } 1204 1205 // Collector 1206 for (collector_value, expected) in [ 1207 ( 1208 "\"drc\"", 1209 Some(wasmtime::Collector::DeferredReferenceCounting), 1210 ), 1211 ("\"null\"", Some(wasmtime::Collector::Null)), 1212 ("\"hello\"", None), // should fail 1213 ("5", None), // should fail 1214 ("true", None), // should fail 1215 ] { 1216 let toml = format!( 1217 r#" 1218 [codegen] 1219 collector = {collector_value} 1220 "#, 1221 ); 1222 let parsed_collector = toml::from_str::<CommonOptions>(&toml) 1223 .ok() 1224 .and_then(|common_options| common_options.codegen.collector); 1225 assert_eq!( 1226 parsed_collector, expected, 1227 "Mismatch for input '{collector_value}'. Parsed: {parsed_collector:?}, Expected: {expected:?}", 1228 ); 1229 } 1230 } 1231 } 1232 1233 impl Default for CommonOptions { 1234 fn default() -> CommonOptions { 1235 CommonOptions::new() 1236 } 1237 } 1238 1239 impl fmt::Display for CommonOptions { 1240 fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { 1241 let CommonOptions { 1242 codegen_raw, 1243 codegen, 1244 debug_raw, 1245 debug, 1246 opts_raw, 1247 opts, 1248 wasm_raw, 1249 wasm, 1250 wasi_raw, 1251 wasi, 1252 configured, 1253 target, 1254 config, 1255 } = self; 1256 if let Some(target) = target { 1257 write!(f, "--target {target} ")?; 1258 } 1259 if let Some(config) = config { 1260 write!(f, "--config {} ", config.display())?; 1261 } 1262 1263 let codegen_flags; 1264 let opts_flags; 1265 let wasi_flags; 1266 let wasm_flags; 1267 let debug_flags; 1268 1269 if *configured { 1270 codegen_flags = codegen.to_options(); 1271 debug_flags = debug.to_options(); 1272 wasi_flags = wasi.to_options(); 1273 wasm_flags = wasm.to_options(); 1274 opts_flags = opts.to_options(); 1275 } else { 1276 codegen_flags = codegen_raw 1277 .iter() 1278 .flat_map(|t| t.0.iter()) 1279 .cloned() 1280 .collect(); 1281 debug_flags = debug_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1282 wasi_flags = wasi_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1283 wasm_flags = wasm_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1284 opts_flags = opts_raw.iter().flat_map(|t| t.0.iter()).cloned().collect(); 1285 } 1286 1287 for flag in codegen_flags { 1288 write!(f, "-C{flag} ")?; 1289 } 1290 for flag in opts_flags { 1291 write!(f, "-O{flag} ")?; 1292 } 1293 for flag in wasi_flags { 1294 write!(f, "-S{flag} ")?; 1295 } 1296 for flag in wasm_flags { 1297 write!(f, "-W{flag} ")?; 1298 } 1299 for flag in debug_flags { 1300 write!(f, "-D{flag} ")?; 1301 } 1302 1303 Ok(()) 1304 } 1305 } 1306