Implement wasm trap handlers.

lib/execute/Cargo.toml

@@ -13,9 +13,16 @@ readme = "README.md"
 cranelift-codegen = "0.25.0"
 cranelift-entity = "0.25.0"
 cranelift-wasm = "0.25.0"
-region = "1.0.0"
 wasmtime-environ = { path = "../environ" }
+region = "1.0.0"
 memmap = "0.7.0"
+lazy_static = "1.2.0"
+libc = "0.2.44"
+
+[build-dependencies]
+cmake = "0.1.35"
+bindgen = "0.43.2"
+regex = "1.0.6"
 
 [features]
 default = ["std"]

lib/execute/build.rs

@@ -0,0 +1,38 @@
+extern crate bindgen;
+extern crate cmake;
+extern crate regex;
+
+use cmake::Config;
+use regex::Regex;
+use std::env;
+use std::path::PathBuf;
+
+fn main() {
+    let dst = Config::new("signalhandlers").build();
+
+    println!("cargo:rustc-link-search=native={}", dst.display());
+    println!("cargo:rustc-link-lib=static=SignalHandlers");
+
+    let mut bindings_builder = bindgen::Builder::default()
+        .header("signalhandlers/SignalHandlers.h")
+        .whitelist_type("CodeSegment")
+        .whitelist_type("TrapContext")
+        .whitelist_type("jmp_buf")
+        .whitelist_function("EnsureEagerSignalHandlers");
+
+    // If we're compiling for Darwin, compile in extra Darwin support routines.
+    if Regex::new(r"-darwin[[:digit:].]*$")
+        .unwrap()
+        .is_match(&env::var("TARGET").unwrap())
+    {
+        bindings_builder = bindings_builder.whitelist_function("EnsureDarwinMachPorts");
+    }
+
+    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
+
+    bindings_builder
+        .generate()
+        .expect("Unable to generate bindings")
+        .write_to_file(out_path.join("signalhandlers.rs"))
+        .expect("Couldn't write bindings!");
+}

lib/execute/signalhandlers/CMakeLists.txt

@@ -0,0 +1,8 @@
+cmake_minimum_required(VERSION 3.0)
+project(SignalHandlers CXX)
+
+set(CMAKE_CXX_FLAGS "-std=c++11 -fno-exceptions -fno-rtti -fPIC")
+
+add_library(SignalHandlers STATIC SignalHandlers.cpp)
+
+install(TARGETS SignalHandlers DESTINATION .)