1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173

#![deny(
    dead_code,
    nonstandard_style,
    unused_imports,
    unused_mut,
    unused_variables,
    unused_unsafe,
    unreachable_patterns
)]
#![cfg_attr(nightly, feature(unwind_attributes))]
#![doc(html_favicon_url = "https://wasmer.io/static/icons/favicon.ico")]
#![doc(html_logo_url = "https://avatars3.githubusercontent.com/u/44205449?s=200&v=4")]

#[cfg(test)]
#[macro_use]
extern crate field_offset;

#[macro_use]
extern crate serde_derive;

#[allow(unused_imports)]
#[macro_use]
extern crate lazy_static;

#[macro_use]
mod macros;
#[doc(hidden)]
pub mod backend;
mod backing;

pub mod cache;
pub mod codegen;
pub mod error;
pub mod export;
pub mod global;
pub mod import;
pub mod instance;
pub mod loader;
pub mod memory;
pub mod module;
pub mod parse;
mod sig_registry;
pub mod structures;
mod sys;
pub mod table;
#[cfg(all(unix, target_arch = "x86_64"))]
pub mod trampoline_x64;
pub mod typed_func;
pub mod types;
pub mod units;
pub mod vm;
#[doc(hidden)]
pub mod vmcalls;
#[cfg(all(unix, target_arch = "x86_64"))]
pub use trampoline_x64 as trampoline;
#[cfg(all(unix, target_arch = "x86_64"))]
pub mod fault;
pub mod state;
#[cfg(feature = "managed")]
pub mod tiering;

use self::error::CompileResult;
#[doc(inline)]
pub use self::error::Result;
#[doc(inline)]
pub use self::import::IsExport;
#[doc(inline)]
pub use self::instance::{DynFunc, Instance};
#[doc(inline)]
pub use self::module::Module;
#[doc(inline)]
pub use self::typed_func::Func;
use std::sync::Arc;

pub use wasmparser;

use self::cache::{Artifact, Error as CacheError};

pub mod prelude {
    pub use crate::import::{ImportObject, Namespace};
    pub use crate::types::{
        FuncIndex, GlobalIndex, ImportedFuncIndex, ImportedGlobalIndex, ImportedMemoryIndex,
        ImportedTableIndex, LocalFuncIndex, LocalGlobalIndex, LocalMemoryIndex, LocalTableIndex,
        MemoryIndex, TableIndex, Type, Value,
    };
    pub use crate::vm;
    pub use crate::{func, imports};
}

/// Compile a [`Module`] using the provided compiler from
/// WebAssembly binary code. This function is useful if it
/// is necessary to a compile a module before it can be instantiated
/// and must be used if you wish to use a different backend from the default.
///
/// [`Module`]: struct.Module.html
pub fn compile_with(
    wasm: &[u8],
    compiler: &dyn backend::Compiler,
) -> CompileResult<module::Module> {
    let token = backend::Token::generate();
    compiler
        .compile(wasm, Default::default(), token)
        .map(|mut inner| {
            let inner_info: &mut crate::module::ModuleInfo = &mut inner.info;
            inner_info.import_custom_sections(wasm).unwrap();
            module::Module::new(Arc::new(inner))
        })
}

/// The same as `compile_with` but changes the compiler behavior
/// with the values in the `CompilerConfig`
pub fn compile_with_config(
    wasm: &[u8],
    compiler: &dyn backend::Compiler,
    compiler_config: backend::CompilerConfig,
) -> CompileResult<module::Module> {
    let token = backend::Token::generate();
    compiler
        .compile(wasm, compiler_config, token)
        .map(|inner| module::Module::new(Arc::new(inner)))
}

/// Perform validation as defined by the
/// WebAssembly specification. Returns `true` if validation
/// succeeded, `false` if validation failed.
pub fn validate(wasm: &[u8]) -> bool {
    validate_and_report_errors(wasm).is_ok()
}

/// The same as `validate` but with an Error message on failure
pub fn validate_and_report_errors(wasm: &[u8]) -> ::std::result::Result<(), String> {
    validate_and_report_errors_with_features(wasm, Default::default())
}

/// The same as `validate_and_report_errors` but with a Features.
pub fn validate_and_report_errors_with_features(
    wasm: &[u8],
    features: backend::Features,
) -> ::std::result::Result<(), String> {
    use wasmparser::WasmDecoder;
    let config = wasmparser::ValidatingParserConfig {
        operator_config: wasmparser::OperatorValidatorConfig {
            enable_simd: features.simd,
            enable_bulk_memory: false,
            enable_multi_value: false,
            enable_reference_types: false,
            enable_threads: features.threads,
        },
        mutable_global_imports: true,
    };
    let mut parser = wasmparser::ValidatingParser::new(wasm, Some(config));
    loop {
        let state = parser.read();
        match *state {
            wasmparser::ParserState::EndWasm => break Ok(()),
            wasmparser::ParserState::Error(e) => break Err(format!("{}", e)),
            _ => {}
        }
    }
}

pub unsafe fn load_cache_with(
    cache: Artifact,
    compiler: &dyn backend::Compiler,
) -> std::result::Result<module::Module, CacheError> {
    let token = backend::Token::generate();
    compiler
        .from_cache(cache, token)
        .map(|inner| module::Module::new(Arc::new(inner)))
}

/// The current version of this crate
pub const VERSION: &str = env!("CARGO_PKG_VERSION");