wasm_exer
This commit is contained in:
commit
2840c8ae97
1
.gitignore
vendored
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1
.gitignore
vendored
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@ -0,0 +1 @@
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/target
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226
Cargo.lock
generated
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226
Cargo.lock
generated
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@ -0,0 +1,226 @@
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# This file is automatically @generated by Cargo.
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# It is not intended for manual editing.
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version = 3
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[[package]]
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name = "ableos-wasm-loader"
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version = "0.1.0"
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dependencies = [
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"wabt",
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"wasmi",
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]
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[[package]]
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name = "autocfg"
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version = "1.0.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "cdb031dd78e28731d87d56cc8ffef4a8f36ca26c38fe2de700543e627f8a464a"
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[[package]]
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name = "cc"
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version = "1.0.72"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "22a9137b95ea06864e018375b72adfb7db6e6f68cfc8df5a04d00288050485ee"
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[[package]]
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name = "cmake"
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version = "0.1.46"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b7b858541263efe664aead4a5209a4ae5c5d2811167d4ed4ee0944503f8d2089"
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dependencies = [
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"cc",
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]
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[[package]]
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name = "downcast-rs"
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version = "1.2.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9ea835d29036a4087793836fa931b08837ad5e957da9e23886b29586fb9b6650"
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[[package]]
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name = "glob"
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version = "0.2.11"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8be18de09a56b60ed0edf84bc9df007e30040691af7acd1c41874faac5895bfb"
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[[package]]
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name = "itoa"
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version = "0.4.8"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "b71991ff56294aa922b450139ee08b3bfc70982c6b2c7562771375cf73542dd4"
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[[package]]
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name = "libc"
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version = "0.2.107"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "fbe5e23404da5b4f555ef85ebed98fb4083e55a00c317800bc2a50ede9f3d219"
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[[package]]
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name = "memory_units"
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version = "0.3.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "71d96e3f3c0b6325d8ccd83c33b28acb183edcb6c67938ba104ec546854b0882"
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[[package]]
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name = "num-bigint"
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version = "0.2.6"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "090c7f9998ee0ff65aa5b723e4009f7b217707f1fb5ea551329cc4d6231fb304"
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dependencies = [
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"autocfg",
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"num-integer",
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"num-traits",
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]
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[[package]]
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name = "num-integer"
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version = "0.1.44"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d2cc698a63b549a70bc047073d2949cce27cd1c7b0a4a862d08a8031bc2801db"
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dependencies = [
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"autocfg",
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"num-traits",
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]
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[[package]]
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name = "num-rational"
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version = "0.2.4"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "5c000134b5dbf44adc5cb772486d335293351644b801551abe8f75c84cfa4aef"
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dependencies = [
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"autocfg",
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"num-bigint",
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"num-integer",
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"num-traits",
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]
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[[package]]
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name = "num-traits"
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version = "0.2.14"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "9a64b1ec5cda2586e284722486d802acf1f7dbdc623e2bfc57e65ca1cd099290"
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dependencies = [
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"autocfg",
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]
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[[package]]
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name = "parity-wasm"
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version = "0.42.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "be5e13c266502aadf83426d87d81a0f5d1ef45b8027f5a471c360abfe4bfae92"
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[[package]]
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name = "proc-macro2"
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version = "1.0.32"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ba508cc11742c0dc5c1659771673afbab7a0efab23aa17e854cbab0837ed0b43"
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dependencies = [
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"unicode-xid",
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]
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[[package]]
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name = "quote"
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version = "1.0.10"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "38bc8cc6a5f2e3655e0899c1b848643b2562f853f114bfec7be120678e3ace05"
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dependencies = [
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"proc-macro2",
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]
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[[package]]
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name = "ryu"
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version = "1.0.5"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "71d301d4193d031abdd79ff7e3dd721168a9572ef3fe51a1517aba235bd8f86e"
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[[package]]
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name = "serde"
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version = "1.0.130"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f12d06de37cf59146fbdecab66aa99f9fe4f78722e3607577a5375d66bd0c913"
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[[package]]
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name = "serde_derive"
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version = "1.0.130"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "d7bc1a1ab1961464eae040d96713baa5a724a8152c1222492465b54322ec508b"
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dependencies = [
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"proc-macro2",
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"quote",
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"syn",
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]
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[[package]]
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name = "serde_json"
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version = "1.0.69"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "e466864e431129c7e0d3476b92f20458e5879919a0596c6472738d9fa2d342f8"
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dependencies = [
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"itoa",
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"ryu",
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"serde",
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]
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[[package]]
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name = "syn"
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version = "1.0.81"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "f2afee18b8beb5a596ecb4a2dce128c719b4ba399d34126b9e4396e3f9860966"
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dependencies = [
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"proc-macro2",
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"quote",
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"unicode-xid",
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]
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[[package]]
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name = "unicode-xid"
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version = "0.2.2"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "8ccb82d61f80a663efe1f787a51b16b5a51e3314d6ac365b08639f52387b33f3"
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[[package]]
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name = "wabt"
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version = "0.10.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "00bef93d5e6c81a293bccf107cf43aa47239382f455ba14869d36695d8963b9c"
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dependencies = [
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"serde",
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"serde_derive",
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"serde_json",
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"wabt-sys",
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]
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[[package]]
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name = "wabt-sys"
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version = "0.8.0"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "1a4e043159f63e16986e713e9b5e1c06043df4848565bf672e27c523864c7791"
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dependencies = [
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"cc",
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"cmake",
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"glob",
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]
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[[package]]
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name = "wasmi"
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version = "0.9.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "ca00c5147c319a8ec91ec1a0edbec31e566ce2c9cc93b3f9bb86a9efd0eb795d"
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dependencies = [
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"downcast-rs",
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"libc",
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"memory_units",
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"num-rational",
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"num-traits",
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"parity-wasm",
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"wasmi-validation",
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]
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[[package]]
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name = "wasmi-validation"
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version = "0.4.1"
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source = "registry+https://github.com/rust-lang/crates.io-index"
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checksum = "165343ecd6c018fc09ebcae280752702c9a2ef3e6f8d02f1cfcbdb53ef6d7937"
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dependencies = [
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"parity-wasm",
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]
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10
Cargo.toml
Normal file
10
Cargo.toml
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@ -0,0 +1,10 @@
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[package]
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name = "ableos-wasm-loader"
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version = "0.1.0"
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edition = "2018"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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wasmi="*"
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wabt="*"
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105
src/main.rs
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105
src/main.rs
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@ -0,0 +1,105 @@
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extern crate wabt;
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extern crate wasmi;
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use wasmi::{
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Error, Externals, FuncInstance, FuncRef, ImportsBuilder, ModuleImportResolver, ModuleInstance,
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RuntimeArgs, RuntimeValue, Signature, Trap, ValueType,
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};
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pub const KILL: usize = 0;
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pub const ADD_FUNC_INDEX: usize = 1;
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struct HostFunctions;
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impl HostFunctions {
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fn check_signature(&self, index: usize, signature: &Signature) -> bool {
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let (params, ret_ty): (&[ValueType], Option<ValueType>) = match index {
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ADD_FUNC_INDEX => (&[ValueType::I32, ValueType::I32], Some(ValueType::I32)),
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_ => return false,
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};
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signature.params() == params && signature.return_type() == ret_ty
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}
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}
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impl Externals for HostFunctions {
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fn invoke_index(
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&mut self,
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index: usize,
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args: RuntimeArgs,
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) -> Result<Option<RuntimeValue>, Trap> {
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match index {
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ADD_FUNC_INDEX => {
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println!("you pe");
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let a: u32 = args.nth_checked(0)?;
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let b: u32 = args.nth_checked(1)?;
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let result = a + b;
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Ok(Some(RuntimeValue::I32(result as i32)))
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}
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_ => panic!("Unimplemented function at {}", index),
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}
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}
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}
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impl ModuleImportResolver for HostFunctions {
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fn resolve_func(&self, field_name: &str, signature: &Signature) -> Result<FuncRef, Error> {
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let index = match field_name {
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"add" => ADD_FUNC_INDEX,
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_ => {
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return Err(Error::Instantiation(format!(
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"Export {} not found",
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field_name
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)))
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}
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};
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if !self.check_signature(index, signature) {
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return Err(Error::Instantiation(format!(
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"Export {} has a bad signature",
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field_name
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)));
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}
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Ok(FuncInstance::alloc_host(
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Signature::new(&[ValueType::I32, ValueType::I32][..], Some(ValueType::I32)),
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index,
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))
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}
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}
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fn main() {
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// Parse WAT (WebAssembly Text format) into wasm bytecode.
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let wasm_binary = wabt::wat2wasm(include_str!("test.wat"));
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let wasm_binary = match wasm_binary {
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Ok(abc) => abc,
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Err(abc) => {
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println!("{}", abc);
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return;
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}
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};
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// .expect("failed to parse wat");
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// Load wasm binary and prepare it for instantiation.
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let module = wasmi::Module::from_buffer(&wasm_binary).expect("failed to load wasm");
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// Instantiate a module with empty imports and
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// assert that there is no `start` function.
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let instance = ModuleInstance::new(&module, &ImportsBuilder::default())
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.expect("failed to instantiate wasm module")
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.assert_no_start();
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// Finally, invoke the exported function "test" with no parameters
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// and empty external function executor.
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let result: i32 = instance
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.invoke_export("main", &[], &mut HostFunctions)
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// .with_resolver(&mut HostFunctions)
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.expect("failed to execute export")
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.unwrap()
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.try_into()
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.unwrap();
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println!(
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"{:?}",
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result // .unwrap()
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);
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}
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16
src/test.wat
Normal file
16
src/test.wat
Normal file
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@ -0,0 +1,16 @@
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(module
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(import "host" "add" (func $add (param i32 i32)(result i32)))
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(func (export "main") (result i32)
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(call $add (i32.const 123) (i32.const 456))
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(; i32.const 1337 ;)
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)
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)
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(;;
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(func $main (export "_start")
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(; (call $print_greeting) ;)
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return
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)
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;;)
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Reference in a new issue