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Merge pull request #135 from wasmerio/feature/c-api

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C API
This commit is contained in:
Syrus Akbary 2019-02-20 11:51:45 -08:00 committed by GitHub
commit a418595f2f
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GPG Key ID: 4AEE18F83AFDEB23
23 changed files with 2466 additions and 6 deletions
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67
Cargo.lock generated
View File

@ -81,7 +81,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "block-buffer"
version = "0.7.2"
version = "0.7.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"block-padding 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
@ -113,6 +113,21 @@ name = "cast"
version = "0.2.2"
source = "registry+https://github.com/rust-lang/crates.io-index"
[[package]]
name = "cbindgen"
version = "0.7.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"clap 2.32.0 (registry+https://github.com/rust-lang/crates.io-index)",
"log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
"serde 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
"serde_derive 1.0.58 (registry+https://github.com/rust-lang/crates.io-index)",
"serde_json 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
"syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)",
"tempfile 3.0.6 (registry+https://github.com/rust-lang/crates.io-index)",
"toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "cc"
version = "1.0.28"
@ -708,6 +723,14 @@ dependencies = [
"ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "remove_dir_all"
version = "0.5.1"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "rustc-demangle"
version = "0.1.13"
@ -748,6 +771,9 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
name = "serde"
version = "1.0.85"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"serde_derive 1.0.58 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "serde-bench"
@ -791,7 +817,7 @@ name = "sha2"
version = "0.8.0"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"block-buffer 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)",
"block-buffer 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)",
"digest 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
"fake-simd 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)",
"opaque-debug 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
@ -876,6 +902,19 @@ dependencies = [
"serde_json 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "tempfile"
version = "3.0.6"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.48 (registry+https://github.com/rust-lang/crates.io-index)",
"rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
"redox_syscall 0.1.51 (registry+https://github.com/rust-lang/crates.io-index)",
"remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)",
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "termcolor"
version = "1.0.4"
@ -920,6 +959,14 @@ dependencies = [
"winapi 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "toml"
version = "0.4.10"
source = "registry+https://github.com/rust-lang/crates.io-index"
dependencies = [
"serde 1.0.85 (registry+https://github.com/rust-lang/crates.io-index)",
]
[[package]]
name = "typenum"
version = "1.10.0"
@ -1053,6 +1100,16 @@ dependencies = [
"wasmer-runtime-core 0.1.2",
]
[[package]]
name = "wasmer-runtime-c-api"
version = "0.1.4"
dependencies = [
"cbindgen 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)",
"libc 0.2.48 (registry+https://github.com/rust-lang/crates.io-index)",
"wasmer-runtime 0.1.4",
"wasmer-runtime-core 0.1.2",
]
[[package]]
name = "wasmer-runtime-core"
version = "0.1.2"
@ -1172,11 +1229,12 @@ dependencies = [
"checksum backtrace-sys 0.1.28 (registry+https://github.com/rust-lang/crates.io-index)" = "797c830ac25ccc92a7f8a7b9862bde440715531514594a6154e3d4a54dd769b6"
"checksum bindgen 0.46.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8f7f7f0701772b17de73e4f5cbcb1dd6926f4706cba4c1ab62c5367f8bdc94e1"
"checksum bitflags 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "228047a76f468627ca71776ecdebd732a3423081fcf5125585bcd7c49886ce12"
"checksum block-buffer 0.7.2 (registry+https://github.com/rust-lang/crates.io-index)" = "509de513cca6d92b6aacf9c61acfe7eaa160837323a81068d690cc1f8e5740da"
"checksum block-buffer 0.7.0 (registry+https://github.com/rust-lang/crates.io-index)" = "49665c62e0e700857531fa5d3763e91b539ff1abeebd56808d378b495870d60d"
"checksum block-padding 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "d75255892aeb580d3c566f213a2b6fdc1c66667839f45719ee1d30ebf2aea591"
"checksum byte-tools 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "e3b5ca7a04898ad4bcd41c90c5285445ff5b791899bb1b0abdd2a2aa791211d7"
"checksum byteorder 1.3.1 (registry+https://github.com/rust-lang/crates.io-index)" = "a019b10a2a7cdeb292db131fc8113e57ea2a908f6e7894b0c3c671893b65dbeb"
"checksum cast 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "926013f2860c46252efceabb19f4a6b308197505082c609025aa6706c011d427"
"checksum cbindgen 0.7.1 (registry+https://github.com/rust-lang/crates.io-index)" = "32e01024aaf5390d6a8145047371a4f5b0063a14c1e411bc731353bd2278ca44"
"checksum cc 1.0.28 (registry+https://github.com/rust-lang/crates.io-index)" = "bb4a8b715cb4597106ea87c7c84b2f1d452c7492033765df7f32651e66fcf749"
"checksum cexpr 0.3.4 (registry+https://github.com/rust-lang/crates.io-index)" = "644d693ecfa91955ed32dcc7eda4914e1be97a641fb6f0645a37348e20b230da"
"checksum cfg-if 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)" = "082bb9b28e00d3c9d39cc03e64ce4cea0f1bb9b3fde493f0cbc008472d22bdf4"
@ -1248,6 +1306,7 @@ dependencies = [
"checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
"checksum regex 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "37e7cbbd370869ce2e8dff25c7018702d10b21a20ef7135316f8daecd6c25b7f"
"checksum regex-syntax 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)" = "8c2f35eedad5295fdf00a63d7d4b238135723f92b434ec06774dad15c7ab0861"
"checksum remove_dir_all 0.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "3488ba1b9a2084d38645c4c08276a1752dcbf2c7130d74f1569681ad5d2799c5"
"checksum rustc-demangle 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)" = "adacaae16d02b6ec37fdc7acfcddf365978de76d1983d3ee22afc260e1ca9619"
"checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
"checksum ryu 0.2.7 (registry+https://github.com/rust-lang/crates.io-index)" = "eb9e9b8cde282a9fe6a42dd4681319bfb63f121b8a8ee9439c6f4107e58a46f7"
@ -1269,11 +1328,13 @@ dependencies = [
"checksum syn 0.15.26 (registry+https://github.com/rust-lang/crates.io-index)" = "f92e629aa1d9c827b2bb8297046c1ccffc57c99b947a680d3ccff1f136a3bee9"
"checksum synstructure 0.10.1 (registry+https://github.com/rust-lang/crates.io-index)" = "73687139bf99285483c96ac0add482c3776528beac1d97d444f6e91f203a2015"
"checksum target-lexicon 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "4af5e2227f0b887d591d3724b796a96eff04226104d872f5b3883fcd427d64b9"
"checksum tempfile 3.0.6 (registry+https://github.com/rust-lang/crates.io-index)" = "37daa55a7240c4931c84559f03b3cad7d19535840d1c4a0cc4e9b2fb0dcf70ff"
"checksum termcolor 1.0.4 (registry+https://github.com/rust-lang/crates.io-index)" = "4096add70612622289f2fdcdbd5086dc81c1e2675e6ae58d6c4f62a16c6d7f2f"
"checksum termion 1.5.1 (registry+https://github.com/rust-lang/crates.io-index)" = "689a3bdfaab439fd92bc87df5c4c78417d3cbe537487274e9b0b2dce76e92096"
"checksum textwrap 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "307686869c93e71f94da64286f9a9524c0f308a9e1c87a583de8e9c9039ad3f6"
"checksum thread_local 0.3.6 (registry+https://github.com/rust-lang/crates.io-index)" = "c6b53e329000edc2b34dbe8545fd20e55a333362d0a321909685a19bd28c3f1b"
"checksum time 0.1.42 (registry+https://github.com/rust-lang/crates.io-index)" = "db8dcfca086c1143c9270ac42a2bbd8a7ee477b78ac8e45b19abfb0cbede4b6f"
"checksum toml 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)" = "758664fc71a3a69038656bee8b6be6477d2a6c315a6b81f7081f591bffa4111f"
"checksum typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "612d636f949607bdf9b123b4a6f6d966dedf3ff669f7f045890d3a4a73948169"
"checksum ucd-util 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "535c204ee4d8434478593480b8f86ab45ec9aae0e83c568ca81abf0fd0e88f86"
"checksum unicode-segmentation 1.2.1 (registry+https://github.com/rust-lang/crates.io-index)" = "aa6024fc12ddfd1c6dbc14a80fa2324d4568849869b779f6bd37e5e4c03344d1"

2
Cargo.toml
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@ -27,7 +27,7 @@ wasmer-runtime-core = { path = "lib/runtime-core" }
wasmer-emscripten = { path = "lib/emscripten" }
[workspace]
members = ["lib/clif-backend", "lib/runtime", "lib/runtime-core", "lib/emscripten", "lib/spectests", "lib/win-exception-handler"]
members = ["lib/clif-backend", "lib/runtime", "lib/runtime-core", "lib/emscripten", "lib/spectests", "lib/win-exception-handler", "lib/runtime-c-api"]
[build-dependencies]
wabt = "0.7.2"

8
Makefile
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@ -12,6 +12,9 @@ spectests:
emtests:
WASM_EMSCRIPTEN_GENERATE_EMTESTS=1 cargo build -p wasmer-emscripten
capi:
WASM_EMSCRIPTEN_GENERATE_C_API_HEADERS=1 cargo build --manifest-path lib/runtime-c-api/Cargo.toml --features generate-c-api-headers
# clean:
# rm -rf artifacts
@ -34,9 +37,10 @@ precommit: lint test
test:
# We use one thread so the emscripten stdouts doesn't collide
cargo test --all -- --test-threads=1 $(runargs)
cargo test --all --exclude wasmer-runtime-c-api -- --test-threads=1 $(runargs)
# cargo test --all --exclude wasmer-emscripten -- --test-threads=1 $(runargs)
# cargo test -p wasmer-spectests -- --test-threads=1 $(runargs)
cargo build -p wasmer-runtime-c-api
cargo test -p wasmer-runtime-c-api -- --nocapture
release:
# If you are in OS-X, you will need mingw-w64 for cross compiling to windows

25
lib/runtime-c-api/Cargo.toml Normal file
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@ -0,0 +1,25 @@
[package]
name = "wasmer-runtime-c-api"
version = "0.1.4"
description = "Wasmer c-api library"
license = "MIT"
authors = ["The Wasmer Engineering Team <engineering@wasmer.io>"]
repository = "https://github.com/wasmerio/wasmer"
edition = "2018"
readme = "README.md"
[dependencies]
wasmer-runtime = { path = "../runtime", version = "0.1.2" }
wasmer-runtime-core = { path = "../runtime-core", version = "0.1.2" }
libc = "0.2"
[lib]
crate-type = ["cdylib"]
[build-dependencies]
cbindgen = { version = "0.7.1", optional = true }
[features]
generate-c-api-headers = ["cbindgen"]

10
lib/runtime-c-api/README.md Normal file
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@ -0,0 +1,10 @@
# Wasmer Runtime C API
## Generating header files
Run `make capi` from wasmer project root directory
## Running tests
The tests can be run via `cargo test`, E.g. `cargo test -p wasmer-runtime-c-api -- --nocapture`
*Running manually*
`cmake . && make && make test` from the `lib/runtime-c-api/tests` directory

39
lib/runtime-c-api/build.rs Normal file
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@ -0,0 +1,39 @@
#[cfg(feature = "generate-c-api-headers")]
extern crate cbindgen;
use std::env;
static CAPI_ENV_VAR: &str = "WASM_EMSCRIPTEN_GENERATE_C_API_HEADERS";
fn main() {
if env::var(CAPI_ENV_VAR).unwrap_or("0".to_string()) == "1" {
build();
}
}
#[cfg(feature = "generate-c-api-headers")]
fn build() {
let crate_dir = env::var("CARGO_MANIFEST_DIR").unwrap();
use cbindgen::Language;
cbindgen::Builder::new()
.with_crate(crate_dir.clone())
.with_language(Language::C)
.with_include_guard("WASMER_H")
.generate()
.expect("Unable to generate C bindings")
.write_to_file("wasmer.h");
cbindgen::Builder::new()
.with_crate(crate_dir)
.with_language(Language::Cxx)
.with_include_guard("WASMER_H")
.generate()
.expect("Unable to generate C++ bindings")
.write_to_file("wasmer.hh");
}
#[cfg(not(feature = "generate-c-api-headers"))]
fn build() {
panic!("environment var set to generate wasmer c API headers but generate-c-api-headers feature not enabled")
}

1105
lib/runtime-c-api/src/lib.rs Normal file
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20
lib/runtime-c-api/tests/.gitignore vendored Normal file
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@ -0,0 +1,20 @@
CMakeLists.txt.user
CMakeCache.txt
CMakeFiles
CMakeScripts
Testing
Makefile
cmake_install.cmake
install_manifest.txt
compile_commands.json
CTestTestfile.cmake
_deps
test-globals
test-exports
test-instantiate
test-import-function
test-memory
test-module
test-tables
test-validate
rust-build

48
lib/runtime-c-api/tests/CMakeLists.txt Normal file
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@ -0,0 +1,48 @@
cmake_minimum_required (VERSION 2.6)
project (WasmerCApiTests)
add_executable(test-exports test-exports.c)
add_executable(test-globals test-globals.c)
add_executable(test-instantiate test-instantiate.c)
add_executable(test-import-function test-import-function.c)
add_executable(test-memory test-memory.c)
add_executable(test-module test-module.c)
add_executable(test-validate test-validate.c)
add_executable(test-tables test-tables.c)
find_library(
WASMER_LIB NAMES libwasmer_runtime_c_api.dylib libwasmer_runtime_c_api.so libwasmer_runtime_c_api.dll
PATHS ${CMAKE_SOURCE_DIR}/../../../target/debug/
)
if(NOT WASMER_LIB)
message(FATAL_ERROR "wasmer library not found")
endif()
target_link_libraries(test-exports
general ${WASMER_LIB})
target_link_libraries(test-globals
general ${WASMER_LIB})
target_link_libraries(test-instantiate
general ${WASMER_LIB})
target_link_libraries(test-import-function
general ${WASMER_LIB})
target_link_libraries(test-memory
general ${WASMER_LIB})
target_link_libraries(test-module
general ${WASMER_LIB})
target_link_libraries(test-validate
general ${WASMER_LIB})
target_link_libraries(test-tables
general ${WASMER_LIB})
enable_testing()
add_test(test-exports test-exports)
add_test(test-globals test-globals)
add_test(test-instantiate test-instantiate)
add_test(test-import-function test-import-function)
add_test(test-memory test-memory)
add_test(test-module test-module)
add_test(test-validate test-validate)
add_test(test-tables test-tables)

39
lib/runtime-c-api/tests/runtime_c_api_tests.rs Normal file
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@ -0,0 +1,39 @@
use std::process::Command;
#[test]
fn test_c_api() {
let project_tests_dir = concat!(env!("CARGO_MANIFEST_DIR"), "/tests");
run_command("cmake", project_tests_dir, Some("."));
run_command("make", project_tests_dir, None);
run_command("make", project_tests_dir, Some("test"));
}
fn run_command(command_str: &str, dir: &str, arg: Option<&str>) {
println!("Running command: `{}` arg: {:?}", command_str, arg);
let mut command = Command::new(command_str);
if let Some(a) = arg {
command.arg(a);
}
command.current_dir(dir);
let result = command.output();
match result {
Ok(r) => {
println!("output:");
if let Some(code) = r.status.code() {
println!("status: {}", code);
} else {
println!("status: None");
}
println!("stdout:");
println!("{}", String::from_utf8_lossy(&r.stdout[..]));
println!("stderr:");
println!("{}", String::from_utf8_lossy(&r.stderr[..]));
if r.status.success() {
assert!(true)
} else {
panic!("Command failed with exit status: {:?}", r.status);
}
}
Err(e) => panic!("Command failed: {}", e),
}
}

BIN
lib/runtime-c-api/tests/sum.wasm Normal file
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86
lib/runtime-c-api/tests/test-exports.c Normal file
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@ -0,0 +1,86 @@
#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
// Read the wasm file bytes
FILE *file = fopen("sum.wasm", "r");
fseek(file, 0, SEEK_END);
long len = ftell(file);
uint8_t *bytes = malloc(len);
fseek(file, 0, SEEK_SET);
fread(bytes, 1, len, file);
fclose(file);
wasmer_import_t imports[] = {};
wasmer_instance_t *instance = NULL;
wasmer_result_t compile_result = wasmer_instantiate(&instance, bytes, len, imports, 0);
printf("Compile result: %d\n", compile_result);
assert(compile_result == WASMER_OK);
wasmer_exports_t *exports = NULL;
wasmer_instance_exports(instance, &exports);
int exports_len = wasmer_exports_len(exports);
printf("exports_len: %d\n", exports_len);
assert(exports_len == 1);
wasmer_export_t *export = wasmer_exports_get(exports, 0);
wasmer_import_export_kind kind = wasmer_export_kind(export);
assert(kind == WASM_FUNCTION);
wasmer_func_t *func = wasmer_export_to_func(export);
wasmer_byte_array name_bytes = wasmer_export_name(export);
assert(name_bytes.bytes_len == 3);
char expected[] = {'s', 'u', 'm'};
for(int idx = 0; idx < 3; idx++){
printf("%c\n", name_bytes.bytes[idx]);
assert(name_bytes.bytes[idx] == expected[idx]);
}
uint32_t params_arity;
wasmer_func_params_arity(func, &params_arity);
assert(params_arity == 2);
wasmer_value_tag *params_sig = malloc(sizeof(wasmer_value_tag) * params_arity);
wasmer_func_params(func, params_sig , params_arity);
assert(params_sig[0] == WASM_I32);
assert(params_sig[1] == WASM_I32);
free(params_sig);
uint32_t returns_arity;
wasmer_func_returns_arity(func, &returns_arity);
assert(returns_arity == 1);
wasmer_value_tag *returns_sig = malloc(sizeof(wasmer_value_tag) * returns_arity);
wasmer_func_returns(func, returns_sig , returns_arity);
assert(returns_sig[0] == WASM_I32);
free(returns_sig);
// wasmer_value_t param_one;
// param_one.tag = WASM_I32;
// param_one.value.I32 = 7;
// wasmer_value_t param_two;
// param_two.tag = WASM_I32;
// param_two.value.I32 = 8;
// wasmer_value_t params[] = {param_one, param_two};
// wasmer_value_t result_one;
// wasmer_value_t results[] = {result_one};
//
// wasmer_result_t call_result = wasmer_func_call(func, params, 2, results, 1);
// printf("Call result: %d\n", call_result);
// printf("Result: %d\n", results[0].value.I32);
// assert(results[0].value.I32 == 15);
// assert(call_result == WASMER_OK);
printf("Destroy instance\n");
wasmer_instance_destroy(instance);
printf("Destroy exports\n");
wasmer_exports_destroy(exports);
return 0;
}

30
lib/runtime-c-api/tests/test-globals.c Normal file
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@ -0,0 +1,30 @@
#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
wasmer_value_t val;
val.tag = WASM_I32;
val.value.I32 = 7;
wasmer_global_t *global = wasmer_global_new(val, true);
wasmer_value_t get_val = wasmer_global_get(global);
assert( get_val.value.I32 == 7);
wasmer_value_t val2;
val2.tag = WASM_I32;
val2.value.I32 = 14;
wasmer_global_set(global, val2);
wasmer_value_t new_get_val = wasmer_global_get(global);
assert( new_get_val.value.I32 == 14);
wasmer_global_descriptor_t desc = wasmer_global_get_descriptor(global);
assert(desc.mutable_);
assert(desc.kind == WASM_I32);
wasmer_global_destroy(global);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
#include <string.h>
static print_str_called = false;
static memory_len = 0;
static ptr_len = 0;
static char actual_str[14] = {};
void print_str(wasmer_instance_context_t *ctx, int32_t ptr, int32_t len)
{
wasmer_memory_t *memory = wasmer_instance_context_memory(ctx, 0);
uint32_t mem_len = wasmer_memory_length(memory);
uint8_t *mem_bytes = wasmer_memory_data(memory);
for (int32_t idx = 0; idx < len; idx++)
{
actual_str[idx] = mem_bytes[ptr + idx];
}
actual_str[13] = '\0';
printf("In print_str, memory len: %d, ptr_len: %d\n, str %s", mem_len, len, actual_str);
print_str_called = true;
memory_len = mem_len;
ptr_len = len;
}
int main()
{
wasmer_value_tag params_sig[] = {WASM_I32, WASM_I32};
wasmer_value_tag returns_sig[] = {};
printf("Creating new func\n");
wasmer_func_t *func = wasmer_func_new(print_str, params_sig, 2, returns_sig, 0);
wasmer_import_t import;
char *module_name = "env";
wasmer_byte_array module_name_bytes;
module_name_bytes.bytes = module_name;
module_name_bytes.bytes_len = strlen(module_name);
char *import_name = "print_str";
wasmer_byte_array import_name_bytes;
import_name_bytes.bytes = import_name;
import_name_bytes.bytes_len = strlen(import_name);
import.module_name = module_name_bytes;
import.import_name = import_name_bytes;
import.tag = WASM_FUNCTION;
import.value.func = func;
wasmer_import_t imports[] = {import};
// Read the wasm file bytes
FILE *file = fopen("wasm_sample_app.wasm", "r");
fseek(file, 0, SEEK_END);
long len = ftell(file);
uint8_t *bytes = malloc(len);
fseek(file, 0, SEEK_SET);
fread(bytes, 1, len, file);
fclose(file);
printf("Instantiating\n");
wasmer_instance_t *instance = NULL;
wasmer_result_t compile_result = wasmer_instantiate(&instance, bytes, len, imports, 1);
printf("Compile result: %d\n", compile_result);
assert(compile_result == WASMER_OK);
wasmer_value_t params[] = {};
wasmer_value_t results[] = {};
wasmer_result_t call_result = wasmer_instance_call(instance, "hello_wasm", params, 0, results, 0);
printf("Call result: %d\n", call_result);
int error_len = wasmer_last_error_length();
printf("Error len: `%d`\n", error_len);
char *error_str = malloc(error_len);
wasmer_last_error_message(error_str, error_len);
printf("Error str: `%s`\n", error_str);
assert(call_result == WASMER_OK);
assert(print_str_called);
assert(memory_len == 17);
assert(ptr_len == 13);
assert(0 == strcmp(actual_str, "Hello, World!"));
printf("Destroying func\n");
wasmer_func_destroy(func);
printf("Destroy instance\n");
wasmer_instance_destroy(instance);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
// Read the wasm file bytes
FILE *file = fopen("sum.wasm", "r");
fseek(file, 0, SEEK_END);
long len = ftell(file);
uint8_t *bytes = malloc(len);
fseek(file, 0, SEEK_SET);
fread(bytes, 1, len, file);
fclose(file);
wasmer_import_t imports[] = {};
wasmer_instance_t *instance = NULL;
wasmer_result_t compile_result = wasmer_instantiate(&instance, bytes, len, imports, 0);
printf("Compile result: %d\n", compile_result);
assert(compile_result == WASMER_OK);
wasmer_value_t param_one;
param_one.tag = WASM_I32;
param_one.value.I32 = 7;
wasmer_value_t param_two;
param_two.tag = WASM_I32;
param_two.value.I32 = 8;
wasmer_value_t params[] = {param_one, param_two};
wasmer_value_t result_one;
wasmer_value_t results[] = {result_one};
wasmer_result_t call_result = wasmer_instance_call(instance, "sum", params, 2, results, 1);
printf("Call result: %d\n", call_result);
printf("Result: %d\n", results[0].value.I32);
assert(results[0].value.I32 == 15);
assert(call_result == WASMER_OK);
wasmer_result_t call_result2 = wasmer_instance_call(instance, "sum", params, 1, results, 1);
printf("Call result bad: %d\n", call_result2);
assert(call_result2 == WASMER_ERROR);
int error_len = wasmer_last_error_length();
printf("Error len: `%d`\n", error_len);
char *error_str = malloc(error_len);
wasmer_last_error_message(error_str, error_len);
printf("Error str: `%s`\n", error_str);
assert(0 == strcmp(error_str, "Call error: Parameters of type [I32] did not match signature [I32, I32] -> [I32]"));
free(error_str);
printf("Destroy instance\n");
wasmer_instance_destroy(instance);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
wasmer_memory_t *memory = NULL;
wasmer_limits_t descriptor;
descriptor.min = 10;
wasmer_limit_option_t max;
max.has_some = true;
max.some = 15;
descriptor.max = max;
wasmer_result_t memory_result = wasmer_memory_new(&memory, descriptor);
printf("Memory result: %d\n", memory_result);
assert(memory_result == WASMER_OK);
uint32_t len = wasmer_memory_length(memory);
printf("Memory pages length: %d\n", len);
assert(len == 10);
wasmer_result_t grow_result = wasmer_memory_grow(memory, 2);
assert(grow_result == WASMER_OK);
uint32_t new_len = wasmer_memory_length(memory);
printf("Memory pages length: %d\n", new_len);
assert(new_len == 12);
uint32_t bytes_len = wasmer_memory_data_length(memory);
printf("Memory bytes length: %d\n", bytes_len);
assert(bytes_len == 12 * 65536);
// Err, grow beyond max
wasmer_result_t grow_result2 = wasmer_memory_grow(memory, 10);
assert(grow_result2 == WASMER_ERROR);
int error_len = wasmer_last_error_length();
char *error_str = malloc(error_len);
wasmer_last_error_message(error_str, error_len);
printf("Error str: `%s`\n", error_str);
assert(0 == strcmp(error_str, "unable to grow memory"));
free(error_str);
// wasmer_memory_t *bad_memory = NULL;
// wasmer_limits_t bad_descriptor;
// bad_descriptor.min = 15;
// bad_descriptor.max = 10;
// wasmer_result_t bad_memory_result = wasmer_memory_new(&bad_memory, bad_descriptor);
// printf("Bad memory result: %d\n", bad_memory_result);
// assert(memory_result == WASMER_MEMORY_ERROR);
//
// int error_len = wasmer_last_error_length();
// char *error_str = malloc(error_len);
// wasmer_last_error_message(error_str, error_len);
// assert(0 == strcmp(error_str, "Creation error"));
// free(error_str);
printf("Destroy memory\n");
wasmer_memory_destroy(memory);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
// Read the wasm file bytes
FILE *file = fopen("sum.wasm", "r");
fseek(file, 0, SEEK_END);
long len = ftell(file);
uint8_t *bytes = malloc(len);
fseek(file, 0, SEEK_SET);
fread(bytes, 1, len, file);
fclose(file);
wasmer_module_t *module = NULL;
wasmer_result_t compile_result = wasmer_compile(&module, bytes, len);
printf("Compile result: %d\n", compile_result);
assert(compile_result == WASMER_OK);
printf("Destroy module\n");
wasmer_module_destroy(module);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
wasmer_table_t *table = NULL;
wasmer_limits_t descriptor;
descriptor.min = 10;
wasmer_limit_option_t max;
// max.has_some = false;
max.has_some = true;
max.some = 15;
descriptor.max = max;
wasmer_result_t table_result = wasmer_table_new(&table, descriptor);
printf("Table result: %d\n", table_result);
assert(table_result == WASMER_OK);
uint32_t len = wasmer_table_length(table);
printf("Table length: %d\n", len);
assert(len == 15);
// wasmer_result_t grow_result1 = wasmer_table_grow(table, 5);
// assert(grow_result1 == WASMER_OK);
// uint32_t len_grow1 = wasmer_table_length(table);
// printf("Table length: %d\n", len_grow1);
// assert(len_grow1 == 15);
// // Try to grow beyond max
// wasmer_result_t grow_result2 = wasmer_table_grow(&table, 1);
// assert(grow_result2 == WASMER_ERROR);
// uint32_t len_grow2 = wasmer_table_length(table);
// printf("Table length: %d\n", len_grow2);
// assert(len_grow2 == 15);
// wasmer_table_t *table_bad = NULL;
// wasmer_limits_t bad_descriptor;
// bad_descriptor.min = 15;
// bad_descriptor.max = 10;
// wasmer_result_t table_bad_result = wasmer_table_new(&table_bad, bad_descriptor);
// printf("Table result: %d\n", table_bad_result);
// assert(table_result == WASMER_ERROR);
printf("Destroy table\n");
wasmer_table_destroy(table);
return 0;
}

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#include <stdio.h>
#include "../wasmer.h"
#include <assert.h>
#include <stdint.h>
int main()
{
// Read the wasm file bytes
FILE *file = fopen("sum.wasm", "r");
fseek(file, 0, SEEK_END);
long len = ftell(file);
uint8_t *bytes = malloc(len);
fseek(file, 0, SEEK_SET);
fread(bytes, 1, len, file);
fclose(file);
bool result = wasmer_validate(bytes, len);
printf("Result: %d", result);
assert(result);
return 0;
}

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#ifndef WASMER_H
#define WASMER_H
#include <stdarg.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdlib.h>
enum wasmer_import_export_kind {
WASM_FUNCTION,
WASM_GLOBAL,
WASM_MEMORY,
WASM_TABLE,
};
typedef uint32_t wasmer_import_export_kind;
typedef enum {
WASMER_OK = 1,
WASMER_ERROR = 2,
} wasmer_result_t;
enum wasmer_value_tag {
WASM_I32,
WASM_I64,
WASM_F32,
WASM_F64,
};
typedef uint32_t wasmer_value_tag;
typedef struct wasmer_instance_context_t wasmer_instance_context_t;
typedef struct wasmer_instance_t wasmer_instance_t;
typedef struct wasmer_module_t wasmer_module_t;
typedef struct {
} wasmer_export_t;
typedef struct {
const uint8_t *bytes;
uint32_t bytes_len;
} wasmer_byte_array;
typedef struct {
} wasmer_func_t;
typedef struct {
} wasmer_exports_t;
typedef union {
int32_t I32;
int64_t I64;
float F32;
double F64;
} wasmer_value;
typedef struct {
wasmer_value_tag tag;
wasmer_value value;
} wasmer_value_t;
typedef struct {
} wasmer_global_t;
typedef struct {
bool mutable_;
wasmer_value_tag kind;
} wasmer_global_descriptor_t;
typedef struct {
} wasmer_memory_t;
typedef struct {
} wasmer_table_t;
typedef union {
const wasmer_func_t *func;
const wasmer_table_t *table;
const wasmer_memory_t *memory;
const wasmer_global_t *global;
} wasmer_import_export_value;
typedef struct {
wasmer_byte_array module_name;
wasmer_byte_array import_name;
wasmer_import_export_kind tag;
wasmer_import_export_value value;
} wasmer_import_t;
typedef struct {
bool has_some;
uint32_t some;
} wasmer_limit_option_t;
typedef struct {
uint32_t min;
wasmer_limit_option_t max;
} wasmer_limits_t;
/**
* Creates a new Module from the given wasm bytes.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_compile(wasmer_module_t **module,
uint8_t *wasm_bytes,
uint32_t wasm_bytes_len);
/**
* Gets wasmer_export kind
*/
wasmer_import_export_kind wasmer_export_kind(wasmer_export_t *export_);
/**
* Gets name from wasmer_export
*/
wasmer_byte_array wasmer_export_name(wasmer_export_t *export_);
/**
* Gets func from wasm_export
*/
const wasmer_func_t *wasmer_export_to_func(wasmer_export_t *export_);
/**
* Frees the memory for the given exports
*/
void wasmer_exports_destroy(wasmer_exports_t *exports);
/**
* Gets wasmer_export by index
*/
wasmer_export_t *wasmer_exports_get(wasmer_exports_t *exports, int idx);
/**
* Gets the length of the exports
*/
int wasmer_exports_len(wasmer_exports_t *exports);
/**
* Calls a `func` with the provided parameters.
* Results are set using the provided `results` pointer.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_func_call(wasmer_func_t *func,
const wasmer_value_t *params,
int params_len,
wasmer_value_t *results,
int results_len);
/**
* Frees memory for the given Func
*/
void wasmer_func_destroy(wasmer_func_t *func);
/**
* Creates new func
* The caller owns the object and should call `wasmer_func_destroy` to free it.
*/
const wasmer_func_t *wasmer_func_new(void (*func)(void *data),
const wasmer_value_tag *params,
int params_len,
const wasmer_value_tag *returns,
int returns_len);
/**
* Sets the params buffer to the parameter types of the given wasmer_func_t
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_func_params(wasmer_func_t *func, wasmer_value_tag *params, int params_len);
/**
* Sets the result parameter to the arity of the params of the wasmer_func_t
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_func_params_arity(wasmer_func_t *func, uint32_t *result);
/**
* Sets the returns buffer to the parameter types of the given wasmer_func_t
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_func_returns(wasmer_func_t *func,
wasmer_value_tag *returns,
int returns_len);
/**
* Sets the result parameter to the arity of the returns of the wasmer_func_t
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_func_returns_arity(wasmer_func_t *func, uint32_t *result);
/**
* Frees memory for the given Global
*/
void wasmer_global_destroy(wasmer_global_t *global);
/**
* Gets the value stored by the given Global
*/
wasmer_value_t wasmer_global_get(wasmer_global_t *global);
/**
* Returns a descriptor (type, mutability) of the given Global
*/
wasmer_global_descriptor_t wasmer_global_get_descriptor(wasmer_global_t *global);
/**
* Creates a new Global and returns a pointer to it.
* The caller owns the object and should call `wasmer_global_destroy` to free it.
*/
wasmer_global_t *wasmer_global_new(wasmer_value_t value, bool mutable_);
/**
* Sets the value stored by the given Global
*/
void wasmer_global_set(wasmer_global_t *global, wasmer_value_t value);
/**
* Calls an instances exported function by `name` with the provided parameters.
* Results are set using the provided `results` pointer.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_instance_call(wasmer_instance_t *instance,
const char *name,
const wasmer_value_t *params,
int params_len,
wasmer_value_t *results,
int results_len);
/**
* Gets the memory within the context at the index `memory_idx`.
* The index is always 0 until multiple memories are supported.
*/
const wasmer_memory_t *wasmer_instance_context_memory(wasmer_instance_context_t *ctx,
uint32_t memory_idx);
/**
* Frees memory for the given Instance
*/
void wasmer_instance_destroy(wasmer_instance_t *instance);
/**
* Gets Exports for the given instance
* The caller owns the object and should call `wasmer_exports_destroy` to free it.
*/
void wasmer_instance_exports(wasmer_instance_t *instance, wasmer_exports_t **exports);
/**
* Creates a new Instance from the given wasm bytes and imports.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_instantiate(wasmer_instance_t **instance,
uint8_t *wasm_bytes,
uint32_t wasm_bytes_len,
wasmer_import_t *imports,
int imports_len);
/**
* Gets the length in bytes of the last error.
* This can be used to dynamically allocate a buffer with the correct number of
* bytes needed to store a message.
* # Example
* ```
* int error_len = wasmer_last_error_length();
* char *error_str = malloc(error_len);
* ```
*/
int wasmer_last_error_length(void);
/**
* Stores the last error message into the provided buffer up to the given `length`.
* The `length` parameter must be large enough to store the last error message.
* Returns the length of the string in bytes.
* Returns `-1` if an error occurs.
* # Example
* ```
* int error_len = wasmer_last_error_length();
* char *error_str = malloc(error_len);
* wasmer_last_error_message(error_str, error_len);
* printf("Error str: `%s`\n", error_str);
* ```
*/
int wasmer_last_error_message(char *buffer, int length);
/**
* Gets the start pointer to the bytes within a Memory
*/
uint8_t *wasmer_memory_data(wasmer_memory_t *mem);
/**
* Gets the size in bytes of a Memory
*/
uint32_t wasmer_memory_data_length(wasmer_memory_t *mem);
/**
* Frees memory for the given Memory
*/
void wasmer_memory_destroy(wasmer_memory_t *memory);
/**
* Grows a Memory by the given number of pages.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_memory_grow(wasmer_memory_t *memory, uint32_t delta);
/**
* Returns the current length in pages of the given memory
*/
uint32_t wasmer_memory_length(wasmer_memory_t *memory);
/**
* Creates a new Memory for the given descriptor and initializes the given
* pointer to pointer to a pointer to the new memory.
* The caller owns the object and should call `wasmer_memory_destroy` to free it.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_memory_new(wasmer_memory_t **memory, wasmer_limits_t limits);
/**
* Frees memory for the given Module
*/
void wasmer_module_destroy(wasmer_module_t *module);
/**
* Frees memory for the given Table
*/
void wasmer_table_destroy(wasmer_table_t *table);
/**
* Grows a Table by the given number of elements.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_table_grow(wasmer_table_t *table, uint32_t delta);
/**
* Returns the current length of the given Table
*/
uint32_t wasmer_table_length(wasmer_table_t *table);
/**
* Creates a new Table for the given descriptor and initializes the given
* pointer to pointer to a pointer to the new Table.
* The caller owns the object and should call `wasmer_table_destroy` to free it.
* Returns `wasmer_result_t::WASMER_OK` upon success.
* Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
* and `wasmer_last_error_message` to get an error message.
*/
wasmer_result_t wasmer_table_new(wasmer_table_t **table, wasmer_limits_t limits);
/**
* Returns true for valid wasm bytes and false for invalid bytes
*/
bool wasmer_validate(uint8_t *wasm_bytes, uint32_t wasm_bytes_len);
#endif /* WASMER_H */

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#ifndef WASMER_H
#define WASMER_H
#include <cstdarg>
#include <cstdint>
#include <cstdlib>
enum class wasmer_import_export_kind : uint32_t {
WASM_FUNCTION,
WASM_GLOBAL,
WASM_MEMORY,
WASM_TABLE,
};
enum class wasmer_result_t {
WASMER_OK = 1,
WASMER_ERROR = 2,
};
enum class wasmer_value_tag : uint32_t {
WASM_I32,
WASM_I64,
WASM_F32,
WASM_F64,
};
struct wasmer_instance_context_t;
struct wasmer_instance_t;
struct wasmer_module_t;
struct wasmer_export_t {
};
struct wasmer_byte_array {
const uint8_t *bytes;
uint32_t bytes_len;
};
struct wasmer_func_t {
};
struct wasmer_exports_t {
};
union wasmer_value {
int32_t I32;
int64_t I64;
float F32;
double F64;
};
struct wasmer_value_t {
wasmer_value_tag tag;
wasmer_value value;
};
struct wasmer_global_t {
};
struct wasmer_global_descriptor_t {
bool mutable_;
wasmer_value_tag kind;
};
struct wasmer_memory_t {
};
struct wasmer_table_t {
};
union wasmer_import_export_value {
const wasmer_func_t *func;
const wasmer_table_t *table;
const wasmer_memory_t *memory;
const wasmer_global_t *global;
};
struct wasmer_import_t {
wasmer_byte_array module_name;
wasmer_byte_array import_name;
wasmer_import_export_kind tag;
wasmer_import_export_value value;
};
struct wasmer_limit_option_t {
bool has_some;
uint32_t some;
};
struct wasmer_limits_t {
uint32_t min;
wasmer_limit_option_t max;
};
extern "C" {
/// Creates a new Module from the given wasm bytes.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_compile(wasmer_module_t **module,
uint8_t *wasm_bytes,
uint32_t wasm_bytes_len);
/// Gets wasmer_export kind
wasmer_import_export_kind wasmer_export_kind(wasmer_export_t *export_);
/// Gets name from wasmer_export
wasmer_byte_array wasmer_export_name(wasmer_export_t *export_);
/// Gets func from wasm_export
const wasmer_func_t *wasmer_export_to_func(wasmer_export_t *export_);
/// Frees the memory for the given exports
void wasmer_exports_destroy(wasmer_exports_t *exports);
/// Gets wasmer_export by index
wasmer_export_t *wasmer_exports_get(wasmer_exports_t *exports, int idx);
/// Gets the length of the exports
int wasmer_exports_len(wasmer_exports_t *exports);
/// Calls a `func` with the provided parameters.
/// Results are set using the provided `results` pointer.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_func_call(wasmer_func_t *func,
const wasmer_value_t *params,
int params_len,
wasmer_value_t *results,
int results_len);
/// Frees memory for the given Func
void wasmer_func_destroy(wasmer_func_t *func);
/// Creates new func
/// The caller owns the object and should call `wasmer_func_destroy` to free it.
const wasmer_func_t *wasmer_func_new(void (*func)(void *data),
const wasmer_value_tag *params,
int params_len,
const wasmer_value_tag *returns,
int returns_len);
/// Sets the params buffer to the parameter types of the given wasmer_func_t
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_func_params(wasmer_func_t *func, wasmer_value_tag *params, int params_len);
/// Sets the result parameter to the arity of the params of the wasmer_func_t
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_func_params_arity(wasmer_func_t *func, uint32_t *result);
/// Sets the returns buffer to the parameter types of the given wasmer_func_t
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_func_returns(wasmer_func_t *func,
wasmer_value_tag *returns,
int returns_len);
/// Sets the result parameter to the arity of the returns of the wasmer_func_t
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_func_returns_arity(wasmer_func_t *func, uint32_t *result);
/// Frees memory for the given Global
void wasmer_global_destroy(wasmer_global_t *global);
/// Gets the value stored by the given Global
wasmer_value_t wasmer_global_get(wasmer_global_t *global);
/// Returns a descriptor (type, mutability) of the given Global
wasmer_global_descriptor_t wasmer_global_get_descriptor(wasmer_global_t *global);
/// Creates a new Global and returns a pointer to it.
/// The caller owns the object and should call `wasmer_global_destroy` to free it.
wasmer_global_t *wasmer_global_new(wasmer_value_t value, bool mutable_);
/// Sets the value stored by the given Global
void wasmer_global_set(wasmer_global_t *global, wasmer_value_t value);
/// Calls an instances exported function by `name` with the provided parameters.
/// Results are set using the provided `results` pointer.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_instance_call(wasmer_instance_t *instance,
const char *name,
const wasmer_value_t *params,
int params_len,
wasmer_value_t *results,
int results_len);
/// Gets the memory within the context at the index `memory_idx`.
/// The index is always 0 until multiple memories are supported.
const wasmer_memory_t *wasmer_instance_context_memory(wasmer_instance_context_t *ctx,
uint32_t memory_idx);
/// Frees memory for the given Instance
void wasmer_instance_destroy(wasmer_instance_t *instance);
/// Gets Exports for the given instance
/// The caller owns the object and should call `wasmer_exports_destroy` to free it.
void wasmer_instance_exports(wasmer_instance_t *instance, wasmer_exports_t **exports);
/// Creates a new Instance from the given wasm bytes and imports.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_instantiate(wasmer_instance_t **instance,
uint8_t *wasm_bytes,
uint32_t wasm_bytes_len,
wasmer_import_t *imports,
int imports_len);
/// Gets the length in bytes of the last error.
/// This can be used to dynamically allocate a buffer with the correct number of
/// bytes needed to store a message.
/// # Example
/// ```
/// int error_len = wasmer_last_error_length();
/// char *error_str = malloc(error_len);
/// ```
int wasmer_last_error_length();
/// Stores the last error message into the provided buffer up to the given `length`.
/// The `length` parameter must be large enough to store the last error message.
/// Returns the length of the string in bytes.
/// Returns `-1` if an error occurs.
/// # Example
/// ```
/// int error_len = wasmer_last_error_length();
/// char *error_str = malloc(error_len);
/// wasmer_last_error_message(error_str, error_len);
/// printf("Error str: `%s`\n", error_str);
/// ```
int wasmer_last_error_message(char *buffer, int length);
/// Gets the start pointer to the bytes within a Memory
uint8_t *wasmer_memory_data(wasmer_memory_t *mem);
/// Gets the size in bytes of a Memory
uint32_t wasmer_memory_data_length(wasmer_memory_t *mem);
/// Frees memory for the given Memory
void wasmer_memory_destroy(wasmer_memory_t *memory);
/// Grows a Memory by the given number of pages.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_memory_grow(wasmer_memory_t *memory, uint32_t delta);
/// Returns the current length in pages of the given memory
uint32_t wasmer_memory_length(wasmer_memory_t *memory);
/// Creates a new Memory for the given descriptor and initializes the given
/// pointer to pointer to a pointer to the new memory.
/// The caller owns the object and should call `wasmer_memory_destroy` to free it.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_memory_new(wasmer_memory_t **memory, wasmer_limits_t limits);
/// Frees memory for the given Module
void wasmer_module_destroy(wasmer_module_t *module);
/// Frees memory for the given Table
void wasmer_table_destroy(wasmer_table_t *table);
/// Grows a Table by the given number of elements.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_table_grow(wasmer_table_t *table, uint32_t delta);
/// Returns the current length of the given Table
uint32_t wasmer_table_length(wasmer_table_t *table);
/// Creates a new Table for the given descriptor and initializes the given
/// pointer to pointer to a pointer to the new Table.
/// The caller owns the object and should call `wasmer_table_destroy` to free it.
/// Returns `wasmer_result_t::WASMER_OK` upon success.
/// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
/// and `wasmer_last_error_message` to get an error message.
wasmer_result_t wasmer_table_new(wasmer_table_t **table, wasmer_limits_t limits);
/// Returns true for valid wasm bytes and false for invalid bytes
bool wasmer_validate(uint8_t *wasm_bytes, uint32_t wasm_bytes_len);
} // extern "C"
#endif // WASMER_H

2
lib/runtime-core/src/error.rs
View File

@ -260,6 +260,8 @@ impl std::fmt::Display for CallError {
}
}
impl std::error::Error for CallError {}
/// This error type is produced when creating something,
/// like a `Memory` or a `Table`.
#[derive(Debug, Clone)]