Merge branch 'master' into feature/more-wasi-syscalls

2024-12-14 06:35:40 +00:00 · 2019-08-05 09:55:40 +09:00 · 2019-08-05 09:55:40 +09:00 · 09acf3e581
commit 09acf3e581
parent a12d0ada1a 8dc3bffe6e
72 changed files with 1499 additions and 887 deletions
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@ -5,6 +5,7 @@ All PRs to the Wasmer repository must add to this file.
 Blocks of changes will separated by version increments.

 ## **[Unreleased]**
+- [#609](https://github.com/wasmerio/wasmer/issues/609) Update dependencies

 ## 0.6.0 - 2019-07-31
 - [#603](https://github.com/wasmerio/wasmer/pull/603) Update Wapm-cli, bump version numbers
--- a/Cargo.lock
+++ b/Cargo.lock
--- a/Cargo.toml
+++ b/Cargo.toml
@ -19,11 +19,10 @@ include = [
 ]

 [dependencies]
-byteorder = "1.3.1"
+byteorder = "1.3.2"
 errno = "0.2.4"
-structopt = "0.2.11"
+structopt = "0.2.18"
 wabt = "0.9.0"
-hashbrown = "0.1.8"
 wasmer-clif-backend = { path = "lib/clif-backend" }
 wasmer-singlepass-backend = { path = "lib/singlepass-backend", optional = true }
 wasmer-middleware-common = { path = "lib/middleware-common" }
@ -62,7 +61,7 @@ members = [

 [build-dependencies]
 wabt = "0.9.0"
-glob = "0.2.11"
+glob = "0.3.0"
 rustc_version = "0.2.3"

 [features]
--- a/2
+++ b/2
@ -84,7 +84,7 @@ singlepass: spectests-singlepass emtests-singlepass middleware-singlepass wasite
 cranelift: spectests-cranelift emtests-cranelift middleware-cranelift wasitests-cranelift
 	cargo test -p wasmer-clif-backend --release

-llvm: spectests-llvm emtests-llvm middleware-llvm wasitests-llvm
+llvm: spectests-llvm emtests-llvm wasitests-llvm
 	cargo test -p wasmer-llvm-backend --release


--- a/lib/clif-backend/Cargo.toml
+++ b/lib/clif-backend/Cargo.toml
@ -15,26 +15,26 @@ cranelift-codegen = { version = "0.31" }
 cranelift-entity = { version = "0.31" }
 cranelift-frontend = { package = "wasmer-clif-fork-frontend", version = "0.33" }
 cranelift-wasm = { package = "wasmer-clif-fork-wasm", version = "0.33" }
-hashbrown = "0.1"
 target-lexicon = "0.4.0"
 wasmparser = "0.35.1"
-byteorder = "1"
-nix = "0.14.0"
-libc = "0.2.49"
-rayon = "1.0"
+byteorder = "1.3.2"
+nix = "0.14.1"
+libc = "0.2.60"
+rayon = "1.1.0"

 # Dependencies for caching.
 [dependencies.serde]
-version = "1.0"
+version = "1.0.98"
+features = ["rc"]
 [dependencies.serde_derive]
-version = "1.0"
+version = "1.0.98"
 [dependencies.serde_bytes]
-version = "0.10"
+version = "0.11.1"
 [dependencies.serde-bench]
 version = "0.0.7"

 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", features = ["errhandlingapi", "minwindef", "minwinbase", "winnt"] }
+winapi = { version = "0.3.7", features = ["errhandlingapi", "minwindef", "minwinbase", "winnt"] }
 wasmer-win-exception-handler = { path = "../win-exception-handler", version = "0.6.0" }

 [features]
--- a/lib/clif-backend/src/cache.rs
+++ b/lib/clif-backend/src/cache.rs
@ -1,6 +1,6 @@
 use crate::relocation::{ExternalRelocation, TrapSink};

-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::sync::Arc;
 use wasmer_runtime_core::{
    backend::{sys::Memory, CacheGen},
--- a/lib/clif-backend/src/code.rs
+++ b/lib/clif-backend/src/code.rs
@ -89,10 +89,12 @@ impl ModuleCodeGenerator<CraneliftFunctionCodeGenerator, Caller, CodegenError>
            func,
            func_translator,
            next_local: 0,
-            clif_signatures: self.clif_signatures.clone(),
+            position: Position::default(),
+            func_env: FunctionEnvironment {
                module_info: Arc::clone(&module_info),
                target_config: self.isa.frontend_config().clone(),
-            position: Position::default(),
+                clif_signatures: self.clif_signatures.clone(),
+            },
        };

        debug_assert_eq!(func_env.func.dfg.num_ebbs(), 0, "Function must be empty");
@ -391,10 +393,8 @@ pub struct CraneliftFunctionCodeGenerator {
    func: Function,
    func_translator: FuncTranslator,
    next_local: usize,
-    pub clif_signatures: Map<SigIndex, ir::Signature>,
-    module_info: Arc<RwLock<ModuleInfo>>,
-    target_config: isa::TargetFrontendConfig,
    position: Position,
+    func_env: FunctionEnvironment,
 }

 pub struct FunctionEnvironment {
@ -1138,11 +1138,6 @@ impl FunctionCodeGenerator<CodegenError> for CraneliftFunctionCodeGenerator {
        //let builder = self.builder.as_mut().unwrap();
        //let func_environment = FuncEnv::new();
        //let state = TranslationState::new();
-        let mut function_environment = FunctionEnvironment {
-            module_info: Arc::clone(&self.module_info),
-            target_config: self.target_config.clone(),
-            clif_signatures: self.clif_signatures.clone(),
-        };

        if self.func_translator.state.control_stack.is_empty() {
            return Ok(());
@ -1154,7 +1149,7 @@ impl FunctionCodeGenerator<CodegenError> for CraneliftFunctionCodeGenerator {
            &mut self.position,
        );
        let state = &mut self.func_translator.state;
-        translate_operator(op, &mut builder, state, &mut function_environment)?;
+        translate_operator(op, &mut builder, state, &mut self.func_env)?;
        Ok(())
    }

--- a/lib/clif-backend/src/lib.rs
+++ b/lib/clif-backend/src/lib.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 mod cache;
 mod code;
 mod libcalls;
--- a/lib/clif-backend/src/trampoline.rs
+++ b/lib/clif-backend/src/trampoline.rs
@ -5,7 +5,7 @@ use cranelift_codegen::{
    ir::{self, InstBuilder},
    isa, Context,
 };
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::{iter, mem, ptr::NonNull};
 use wasmer_runtime_core::{
    backend::sys::{Memory, Protect},
--- a/lib/dev-utils/Cargo.toml
+++ b/lib/dev-utils/Cargo.toml
@ -8,4 +8,4 @@ edition = "2018"
 repository = "https://github.com/wasmerio/wasmer"

 [dependencies]
-libc = "0.2.49"
+libc = "0.2.60"
--- a/lib/emscripten-tests/Cargo.toml
+++ b/lib/emscripten-tests/Cargo.toml
@ -20,7 +20,7 @@ wabt = "0.9.0"
 wasmer-dev-utils = { path = "../dev-utils", version = "0.6.0"}

 [build-dependencies]
-glob = "0.2.11"
+glob = "0.3.0"

 [features]
 clif = []
--- a/lib/emscripten/Cargo.toml
+++ b/lib/emscripten/Cargo.toml
@ -8,15 +8,14 @@ repository = "https://github.com/wasmerio/wasmer"
 edition = "2018"

 [dependencies]
-byteorder = "1"
-hashbrown = "0.1"
-lazy_static = "1.2.0"
-libc = "0.2.49"
-time = "0.1.41"
+byteorder = "1.3.2"
+lazy_static = "1.3.0"
+libc = "0.2.60"
+time = "0.1.42"
 wasmer-runtime-core = { path = "../runtime-core", version = "0.6.0" }

 [target.'cfg(windows)'.dependencies]
-rand = "0.6"
+rand = "0.7.0"

 [features]
 debug = ["wasmer-runtime-core/debug"]
--- a/lib/emscripten/src/env/mod.rs
+++ b/lib/emscripten/src/env/mod.rs
@ -30,6 +30,7 @@ pub fn call_malloc(ctx: &mut Ctx, size: u32) -> u32 {
        .unwrap()
 }

+#[warn(dead_code)]
 pub fn call_malloc_with_cast<T: Copy, Ty>(ctx: &mut Ctx, size: u32) -> WasmPtr<T, Ty> {
    WasmPtr::new(call_malloc(ctx, size))
 }
--- a/lib/emscripten/src/lib.rs
+++ b/lib/emscripten/src/lib.rs
@ -1,11 +1,16 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #[macro_use]
 extern crate wasmer_runtime_core;

-use hashbrown::HashMap;
 use lazy_static::lazy_static;
 use std::cell::UnsafeCell;
+use std::collections::HashMap;
 use std::path::PathBuf;
 use std::{f64, ffi::c_void};
 use wasmer_runtime_core::{
@ -25,11 +30,11 @@ use wasmer_runtime_core::{
 };

 #[cfg(unix)]
-use ::libc::DIR as libcDIR;
+use ::libc::DIR as LibcDir;

 // We use a placeholder for windows
 #[cfg(not(unix))]
-type libcDIR = u8;
+type LibcDir = u8;

 #[macro_use]
 mod macros;
@ -93,7 +98,7 @@ pub struct EmscriptenData<'a> {
    pub memset: Option<Func<'a, (u32, u32, u32), u32>>,
    pub stack_alloc: Option<Func<'a, u32, u32>>,
    pub jumps: Vec<UnsafeCell<[u32; 27]>>,
-    pub opened_dirs: HashMap<i32, Box<*mut libcDIR>>,
+    pub opened_dirs: HashMap<i32, Box<*mut LibcDir>>,

    pub dyn_call_i: Option<Func<'a, i32, i32>>,
    pub dyn_call_ii: Option<Func<'a, (i32, i32), i32>>,
--- a/lib/kernel-loader/Cargo.toml
+++ b/lib/kernel-loader/Cargo.toml
@ -5,5 +5,5 @@ authors = ["Heyang Zhou <zhy20000919@hotmail.com>"]
 edition = "2018"

 [dependencies]
-libc = "0.2.49"
+libc = "0.2.60"
 wasmer-runtime-core = { path = "../runtime-core" }
--- a/lib/llvm-backend/Cargo.toml
+++ b/lib/llvm-backend/Cargo.toml
@ -8,12 +8,11 @@ readme = "README.md"
 [dependencies]
 wasmer-runtime-core = { path = "../runtime-core", version = "0.6.0" }
 wasmparser = "0.35.1"
-hashbrown = "0.1.8"
-smallvec = "0.6.8"
-goblin = "0.0.20"
-libc = "0.2.49"
-nix = "0.14.0"
-capstone = { version = "0.5.0", optional = true }
+smallvec = "0.6.10"
+goblin = "0.0.24"
+libc = "0.2.60"
+nix = "0.14.1"
+capstone = { version = "0.6.0", optional = true }

 [dependencies.inkwell]
 git = "https://github.com/wasmerio/inkwell"
@ -22,12 +21,12 @@ default-features = false
 features = ["llvm8-0", "target-x86"]

 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", features = ["memoryapi"] }
+winapi = { version = "0.3.7", features = ["memoryapi"] }

 [build-dependencies]
 cc = "1.0"
-lazy_static = "1.2.0"
-regex = "1.1.0"
+lazy_static = "1.3.0"
+regex = "1.2.0"
 semver = "0.9"
 rustc_version = "0.2.3"

--- a/lib/llvm-backend/cpp/object_loader.cpp
+++ b/lib/llvm-backend/cpp/object_loader.cpp
@ -17,28 +17,31 @@ public:
    callbacks.dealloc_memory(readwrite_section.base, readwrite_section.size);
  }

-    virtual uint8_t* allocateCodeSection(uintptr_t size, unsigned alignment, unsigned section_id, llvm::StringRef section_name) override {
+  virtual uint8_t *allocateCodeSection(uintptr_t size, unsigned alignment,
+                                       unsigned section_id,
+                                       llvm::StringRef section_name) override {
    return allocate_bump(code_section, code_bump_ptr, size, alignment);
  }

-    virtual uint8_t* allocateDataSection(uintptr_t size, unsigned alignment, unsigned section_id, llvm::StringRef section_name, bool read_only) override {
-        // Allocate from the read-only section or the read-write section, depending on if this allocation
-        // should be read-only or not.
+  virtual uint8_t *allocateDataSection(uintptr_t size, unsigned alignment,
+                                       unsigned section_id,
+                                       llvm::StringRef section_name,
+                                       bool read_only) override {
+    // Allocate from the read-only section or the read-write section, depending
+    // on if this allocation should be read-only or not.
    if (read_only) {
      return allocate_bump(read_section, read_bump_ptr, size, alignment);
    } else {
-            return allocate_bump(readwrite_section, readwrite_bump_ptr, size, alignment);
+      return allocate_bump(readwrite_section, readwrite_bump_ptr, size,
+                           alignment);
    }
  }

-    virtual void reserveAllocationSpace(
-        uintptr_t code_size,
-        uint32_t code_align,
+  virtual void reserveAllocationSpace(uintptr_t code_size, uint32_t code_align,
                                      uintptr_t read_data_size,
                                      uint32_t read_data_align,
                                      uintptr_t read_write_data_size,
-        uint32_t read_write_data_align
-    ) override {
+                                      uint32_t read_write_data_align) override {
    auto aligner = [](uintptr_t ptr, size_t align) {
      if (ptr == 0) {
        return align;
@ -46,35 +49,39 @@ public:
      return (ptr + align - 1) & ~(align - 1);
    };

-
    uint8_t *code_ptr_out = nullptr;
    size_t code_size_out = 0;
-        auto code_result = callbacks.alloc_memory(aligner(code_size, 4096), PROTECT_READ_WRITE, &code_ptr_out, &code_size_out);
+    auto code_result =
+        callbacks.alloc_memory(aligner(code_size, 4096), PROTECT_READ_WRITE,
+                               &code_ptr_out, &code_size_out);
    assert(code_result == RESULT_OK);
    code_section = Section{code_ptr_out, code_size_out};
    code_bump_ptr = (uintptr_t)code_ptr_out;

    uint8_t *read_ptr_out = nullptr;
    size_t read_size_out = 0;
-        auto read_result = callbacks.alloc_memory(aligner(read_data_size, 4096), PROTECT_READ_WRITE, &read_ptr_out, &read_size_out);
+    auto read_result = callbacks.alloc_memory(aligner(read_data_size, 4096),
+                                              PROTECT_READ_WRITE, &read_ptr_out,
+                                              &read_size_out);
    assert(read_result == RESULT_OK);
    read_section = Section{read_ptr_out, read_size_out};
    read_bump_ptr = (uintptr_t)read_ptr_out;

    uint8_t *readwrite_ptr_out = nullptr;
    size_t readwrite_size_out = 0;
-        auto readwrite_result = callbacks.alloc_memory(aligner(read_write_data_size, 4096), PROTECT_READ_WRITE, &readwrite_ptr_out, &readwrite_size_out);
+    auto readwrite_result = callbacks.alloc_memory(
+        aligner(read_write_data_size, 4096), PROTECT_READ_WRITE,
+        &readwrite_ptr_out, &readwrite_size_out);
    assert(readwrite_result == RESULT_OK);
    readwrite_section = Section{readwrite_ptr_out, readwrite_size_out};
    readwrite_bump_ptr = (uintptr_t)readwrite_ptr_out;
  }

  /* Turn on the `reserveAllocationSpace` callback. */
-    virtual bool needsToReserveAllocationSpace() override {
-        return true;
-    }
+  virtual bool needsToReserveAllocationSpace() override { return true; }

-    virtual void registerEHFrames(uint8_t* addr, uint64_t LoadAddr, size_t size) override {
+  virtual void registerEHFrames(uint8_t *addr, uint64_t LoadAddr,
+                                size_t size) override {
 // We don't know yet how to do this on Windows, so we hide this on compilation
 // so we can compile and pass spectests on unix systems
 #ifndef _WIN32
@ -96,12 +103,15 @@ public:
  }

  virtual bool finalizeMemory(std::string *ErrMsg = nullptr) override {
-        auto code_result = callbacks.protect_memory(code_section.base, code_section.size, mem_protect_t::PROTECT_READ_EXECUTE);
+    auto code_result =
+        callbacks.protect_memory(code_section.base, code_section.size,
+                                 mem_protect_t::PROTECT_READ_EXECUTE);
    if (code_result != RESULT_OK) {
      return false;
    }

-        auto read_result = callbacks.protect_memory(read_section.base, read_section.size, mem_protect_t::PROTECT_READ);
+    auto read_result = callbacks.protect_memory(
+        read_section.base, read_section.size, mem_protect_t::PROTECT_READ);
    if (read_result != RESULT_OK) {
      return false;
    }
@ -111,14 +121,18 @@ public:
    return false;
  }

-    virtual void notifyObjectLoaded(llvm::RuntimeDyld &RTDyld, const llvm::object::ObjectFile &Obj) override {}
+  virtual void
+  notifyObjectLoaded(llvm::RuntimeDyld &RTDyld,
+                     const llvm::object::ObjectFile &Obj) override {}
+
 private:
  struct Section {
    uint8_t *base;
    size_t size;
  };

-    uint8_t* allocate_bump(Section& section, uintptr_t& bump_ptr, size_t size, size_t align) {
+  uint8_t *allocate_bump(Section &section, uintptr_t &bump_ptr, size_t size,
+                         size_t align) {
    auto aligner = [](uintptr_t &ptr, size_t align) {
      ptr = (ptr + align - 1) & ~(align - 1);
    };
@ -172,20 +186,19 @@ private:
  callbacks_t callbacks;
 };

-WasmModule::WasmModule(
-        const uint8_t *object_start,
-        size_t object_size,
-        callbacks_t callbacks
-) : memory_manager(std::unique_ptr<MemoryManager>(new MemoryManager(callbacks)))
-{
+WasmModule::WasmModule(const uint8_t *object_start, size_t object_size,
+                       callbacks_t callbacks)
+    : memory_manager(
+          std::unique_ptr<MemoryManager>(new MemoryManager(callbacks))) {

-
-    if (auto created_object_file = llvm::object::ObjectFile::createObjectFile(llvm::MemoryBufferRef(
-        llvm::StringRef((const char *)object_start, object_size), "object"
-    ))) {
+  if (auto created_object_file =
+          llvm::object::ObjectFile::createObjectFile(llvm::MemoryBufferRef(
+              llvm::StringRef((const char *)object_start, object_size),
+              "object"))) {
    object_file = cantFail(std::move(created_object_file));
    SymbolLookup symbol_resolver(callbacks);
-        runtime_dyld = std::unique_ptr<llvm::RuntimeDyld>(new llvm::RuntimeDyld(*memory_manager, symbol_resolver));
+    runtime_dyld = std::unique_ptr<llvm::RuntimeDyld>(
+        new llvm::RuntimeDyld(*memory_manager, symbol_resolver));

    runtime_dyld->setProcessAllSections(true);

--- a/lib/llvm-backend/cpp/object_loader.hh
+++ b/lib/llvm-backend/cpp/object_loader.hh
@ -1,20 +1,19 @@
 #include <cstddef>
 #include <cstdint>
-#include <llvm/ExecutionEngine/RuntimeDyld.h>
+#include <exception>
 #include <iostream>
 #include <sstream>
-#include <exception>

-typedef enum
-{
+#include <llvm/ExecutionEngine/RuntimeDyld.h>
+
+typedef enum {
  PROTECT_NONE,
  PROTECT_READ,
  PROTECT_READ_WRITE,
  PROTECT_READ_EXECUTE,
 } mem_protect_t;

-typedef enum
-{
+typedef enum {
  RESULT_OK,
  RESULT_ALLOCATE_FAILURE,
  RESULT_PROTECT_FAILURE,
@ -22,17 +21,19 @@ typedef enum
  RESULT_OBJECT_LOAD_FAILURE,
 } result_t;

-typedef result_t (*alloc_memory_t)(size_t size, mem_protect_t protect, uint8_t **ptr_out, size_t *size_out);
-typedef result_t (*protect_memory_t)(uint8_t *ptr, size_t size, mem_protect_t protect);
+typedef result_t (*alloc_memory_t)(size_t size, mem_protect_t protect,
+                                   uint8_t **ptr_out, size_t *size_out);
+typedef result_t (*protect_memory_t)(uint8_t *ptr, size_t size,
+                                     mem_protect_t protect);
 typedef result_t (*dealloc_memory_t)(uint8_t *ptr, size_t size);
 typedef uintptr_t (*lookup_vm_symbol_t)(const char *name_ptr, size_t length);
 typedef void (*fde_visitor_t)(uint8_t *fde);
-typedef result_t (*visit_fde_t)(uint8_t *fde, size_t size, fde_visitor_t visitor);
+typedef result_t (*visit_fde_t)(uint8_t *fde, size_t size,
+                                fde_visitor_t visitor);

 typedef void (*trampoline_t)(void *, void *, void *, void *);

-typedef struct
-{
+typedef struct {
  /* Memory management. */
  alloc_memory_t alloc_memory;
  protect_memory_t protect_memory;
@ -43,33 +44,27 @@ typedef struct
  visit_fde_t visit_fde;
 } callbacks_t;

-typedef struct
-{
+typedef struct {
  size_t data, vtable;
 } box_any_t;

-struct WasmException
-{
+struct WasmException {
 public:
  virtual std::string description() const noexcept = 0;
 };

-struct UncatchableException : WasmException
-{
+struct UncatchableException : WasmException {
 public:
-    virtual std::string description() const noexcept override
-    {
+  virtual std::string description() const noexcept override {
    return "Uncatchable exception";
  }
 };

-struct UserException : UncatchableException
-{
+struct UserException : UncatchableException {
 public:
  UserException(size_t data, size_t vtable) : error_data({data, vtable}) {}

-    virtual std::string description() const noexcept override
-    {
+  virtual std::string description() const noexcept override {
    return "user exception";
  }

@ -77,11 +72,20 @@ struct UserException : UncatchableException
  box_any_t error_data;
 };

-struct WasmTrap : UncatchableException
-{
+struct BreakpointException : UncatchableException {
 public:
-    enum Type
-    {
+  BreakpointException(uintptr_t callback) : callback(callback) {}
+
+  virtual std::string description() const noexcept override {
+    return "breakpoint exception";
+  }
+
+  uintptr_t callback;
+};
+
+struct WasmTrap : UncatchableException {
+public:
+  enum Type {
    Unreachable = 0,
    IncorrectCallIndirectSignature = 1,
    MemoryOutOfBounds = 2,
@ -92,12 +96,9 @@ struct WasmTrap : UncatchableException

  WasmTrap(Type type) : type(type) {}

-    virtual std::string description() const noexcept override
-    {
+  virtual std::string description() const noexcept override {
    std::ostringstream ss;
-        ss
-            << "WebAssembly trap:" << '\n'
-            << " - type: " << type << '\n';
+    ss << "WebAssembly trap:" << '\n' << " - type: " << type << '\n';

    return ss.str();
  }
@ -105,10 +106,8 @@ struct WasmTrap : UncatchableException
  Type type;

 private:
-    friend std::ostream &operator<<(std::ostream &out, const Type &ty)
-    {
-        switch (ty)
-        {
+  friend std::ostream &operator<<(std::ostream &out, const Type &ty) {
+    switch (ty) {
    case Type::Unreachable:
      out << "unreachable";
      break;
@ -133,13 +132,12 @@ struct WasmTrap : UncatchableException
  }
 };

-struct CatchableException : WasmException
-{
+struct CatchableException : WasmException {
 public:
-    CatchableException(uint32_t type_id, uint32_t value_num) : type_id(type_id), value_num(value_num) {}
+  CatchableException(uint32_t type_id, uint32_t value_num)
+      : type_id(type_id), value_num(value_num) {}

-    virtual std::string description() const noexcept override
-    {
+  virtual std::string description() const noexcept override {
    return "catchable exception";
  }

@ -147,27 +145,26 @@ struct CatchableException : WasmException
  uint64_t values[1];
 };

-struct WasmModule
-{
+struct WasmModule {
 public:
-    WasmModule(
-        const uint8_t *object_start,
-        size_t object_size,
+  WasmModule(const uint8_t *object_start, size_t object_size,
             callbacks_t callbacks);

  void *get_func(llvm::StringRef name) const;

  bool _init_failed = false;
+
 private:
  std::unique_ptr<llvm::RuntimeDyld::MemoryManager> memory_manager;
  std::unique_ptr<llvm::object::ObjectFile> object_file;
  std::unique_ptr<llvm::RuntimeDyld> runtime_dyld;
 };

-extern "C"
-{
-    result_t module_load(const uint8_t *mem_ptr, size_t mem_size, callbacks_t callbacks, WasmModule **module_out)
-    {
+extern "C" {
+void callback_trampoline(void *, void *);
+
+result_t module_load(const uint8_t *mem_ptr, size_t mem_size,
+                     callbacks_t callbacks, WasmModule **module_out) {
  *module_out = new WasmModule(mem_ptr, mem_size, callbacks);

  if ((*module_out)->_init_failed) {
@ -177,14 +174,9 @@ extern "C"
  return RESULT_OK;
 }

-    [[noreturn]] void throw_trap(WasmTrap::Type ty) {
-        throw WasmTrap(ty);
-    }
+[[noreturn]] void throw_trap(WasmTrap::Type ty) { throw WasmTrap(ty); }

-    void module_delete(WasmModule *module)
-    {
-        delete module;
-    }
+void module_delete(WasmModule *module) { delete module; }

 // Throw a fat pointer that's assumed to be `*mut dyn Any` on the rust
 // side.
@ -192,45 +184,37 @@ extern "C"
  throw UserException(data, vtable);
 }

-    bool invoke_trampoline(
-        trampoline_t trampoline,
-        void *ctx,
-        void *func,
-        void *params,
-        void *results,
-        WasmTrap::Type *trap_out,
-        box_any_t *user_error,
-        void *invoke_env) throw()
-    {
-        try
-        {
+// Throw a pointer that's assumed to be codegen::BreakpointHandler on the
+// rust side.
+[[noreturn]] void throw_breakpoint(uintptr_t callback) {
+  throw BreakpointException(callback);
+}
+
+bool invoke_trampoline(trampoline_t trampoline, void *ctx, void *func,
+                       void *params, void *results, WasmTrap::Type *trap_out,
+                       box_any_t *user_error, void *invoke_env) noexcept {
+  try {
    trampoline(ctx, func, params, results);
    return true;
-        }
-        catch (const WasmTrap &e)
-        {
+  } catch (const WasmTrap &e) {
    *trap_out = e.type;
    return false;
-        }
-        catch (const UserException &e)
-        {
+  } catch (const UserException &e) {
    *user_error = e.error_data;
    return false;
-        }
-        catch (const WasmException &e)
-        {
+  } catch (const BreakpointException &e) {
+    callback_trampoline(user_error, (void *)e.callback);
+    return false;
+  } catch (const WasmException &e) {
    *trap_out = WasmTrap::Type::Unknown;
    return false;
-        }
-        catch (...)
-        {
+  } catch (...) {
    *trap_out = WasmTrap::Type::Unknown;
    return false;
  }
 }

-    void *get_func_symbol(WasmModule *module, const char *name)
-    {
+void *get_func_symbol(WasmModule *module, const char *name) {
  return module->get_func(llvm::StringRef(name));
 }
 }
--- a/lib/llvm-backend/src/backend.rs
+++ b/lib/llvm-backend/src/backend.rs
@ -39,7 +39,8 @@ extern "C" {
    fn module_delete(module: *mut LLVMModule);
    fn get_func_symbol(module: *mut LLVMModule, name: *const c_char) -> *const vm::Func;

-    fn throw_trap(ty: i32);
+    fn throw_trap(ty: i32) -> !;
+    fn throw_breakpoint(ty: i64) -> !;

    /// This should be the same as spliting up the fat pointer into two arguments,
    /// but this is cleaner, I think?
@ -103,6 +104,7 @@ fn get_callbacks() -> Callbacks {
            fn_name!("vm.memory.size.static.local") => vmcalls::local_static_memory_size as _,

            fn_name!("vm.exception.trap") => throw_trap as _,
+            fn_name!("vm.breakpoint") => throw_breakpoint as _,

            _ => ptr::null(),
        }
--- a/lib/llvm-backend/src/code.rs
+++ b/lib/llvm-backend/src/code.rs
@ -496,6 +496,21 @@ pub struct CodegenError {
    pub message: String,
 }

+// This is only called by C++ code, the 'pub' + '#[no_mangle]' combination
+// prevents unused function elimination.
+#[no_mangle]
+pub unsafe extern "C" fn callback_trampoline(
+    b: *mut Option<Box<dyn std::any::Any>>,
+    callback: *mut BreakpointHandler,
+) {
+    let callback = Box::from_raw(callback);
+    let result: Result<(), Box<dyn std::any::Any>> = callback(BreakpointInfo { fault: None });
+    match result {
+        Ok(()) => *b = None,
+        Err(e) => *b = Some(e),
+    }
+}
+
 pub struct LLVMModuleCodeGenerator {
    context: Option<Context>,
    builder: Option<Builder>,
@ -612,7 +627,14 @@ impl FunctionCodeGenerator<CodegenError> for LLVMFunctionCodeGenerator {
                    InternalEvent::FunctionBegin(_) | InternalEvent::FunctionEnd => {
                        return Ok(());
                    }
-                    InternalEvent::Breakpoint(_callback) => {
+                    InternalEvent::Breakpoint(callback) => {
+                        let raw = Box::into_raw(Box::new(callback)) as u64;
+                        let callback = intrinsics.i64_ty.const_int(raw, false);
+                        builder.build_call(
+                            intrinsics.throw_breakpoint,
+                            &[callback.as_basic_value_enum()],
+                            "",
+                        );
                        return Ok(());
                    }
                    InternalEvent::GetInternal(idx) => {
--- a/lib/llvm-backend/src/intrinsics.rs
+++ b/lib/llvm-backend/src/intrinsics.rs
@ -1,4 +1,3 @@
-use hashbrown::HashMap;
 use inkwell::{
    builder::Builder,
    context::Context,
@ -9,6 +8,7 @@ use inkwell::{
    values::{BasicValue, BasicValueEnum, FloatValue, FunctionValue, IntValue, PointerValue},
    AddressSpace,
 };
+use std::collections::HashMap;
 use std::marker::PhantomData;
 use wasmer_runtime_core::{
    memory::MemoryType,
@ -147,6 +147,7 @@ pub struct Intrinsics {
    pub memory_size_shared_import: FunctionValue,

    pub throw_trap: FunctionValue,
+    pub throw_breakpoint: FunctionValue,

    pub ctx_ptr_ty: PointerType,
 }
@ -309,7 +310,6 @@ impl Intrinsics {
            i32_ty.fn_type(&[ctx_ptr_ty.as_basic_type_enum(), i32_ty_basic], false);

        let ret_i1_take_i1_i1 = i1_ty.fn_type(&[i1_ty_basic, i1_ty_basic], false);
-
        Self {
            ctlz_i32: module.add_function("llvm.ctlz.i32", ret_i32_take_i32_i1, None),
            ctlz_i64: module.add_function("llvm.ctlz.i64", ret_i64_take_i64_i1, None),
@ -525,6 +525,11 @@ impl Intrinsics {
                void_ty.fn_type(&[i32_ty_basic], false),
                None,
            ),
+            throw_breakpoint: module.add_function(
+                "vm.breakpoint",
+                void_ty.fn_type(&[i64_ty_basic], false),
+                None,
+            ),
            ctx_ptr_ty,
        }
    }
--- a/lib/llvm-backend/src/lib.rs
+++ b/lib/llvm-backend/src/lib.rs
@ -1,4 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #![cfg_attr(nightly, feature(unwind_attributes))]

 mod backend;
--- a/lib/middleware-common/src/lib.rs
+++ b/lib/middleware-common/src/lib.rs
@ -1,4 +1,9 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 pub mod call_trace;
 pub mod metering;
--- a/lib/middleware-common/src/metering.rs
+++ b/lib/middleware-common/src/metering.rs
@ -129,7 +129,7 @@ pub fn set_points_used_ctx(ctx: &mut Ctx, value: u64) {
    ctx.set_internal(&INTERNAL_FIELD, value);
 }

-#[cfg(all(test, feature = "singlepass"))]
+#[cfg(all(test, any(feature = "singlepass", feature = "llvm")))]
 mod tests {
    use super::*;
    use wabt::wat2wasm;
@ -247,7 +247,7 @@ mod tests {
        // verify it returns the correct value
        assert_eq!(value, 7);

-        // verify is uses the correct number of points
+        // verify it used the correct number of points
        assert_eq!(get_points_used(&instance), 74);
    }

@ -276,7 +276,7 @@ mod tests {
            _ => unreachable!(),
        }

-        // verify is uses the correct number of points
+        // verify it used the correct number of points
        assert_eq!(get_points_used(&instance), 109); // Used points will be slightly more than `limit` because of the way we do gas checking.
    }

--- a/lib/runtime-abi/Cargo.toml
+++ b/lib/runtime-abi/Cargo.toml
@ -8,12 +8,11 @@ repository = "https://github.com/wasmerio/wasmer"
 edition = "2018"

 [dependencies]
-libc = "0.2.50"
+libc = "0.2.60"
 wasmer-runtime-core = { path = "../runtime-core" }
-hashbrown = "0.1"
 failure = "0.1"
 tar = "0.4"
-wasmparser = "0.34.0"
+wasmparser = "0.35.1"
 zstd = "0.4"

 # [target.'cfg(unix)'.dependencies.zbox]
--- a/lib/runtime-abi/src/lib.rs
+++ b/lib/runtime-abi/src/lib.rs
@ -1,5 +1,4 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(dead_code, unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
 #[cfg(not(target_os = "windows"))]
 #[macro_use]
 extern crate failure;
--- a/lib/runtime-abi/src/vfs/vfs.rs
+++ b/lib/runtime-abi/src/vfs/vfs.rs
@ -1,7 +1,7 @@
 use crate::vfs::file_like::FileLike;
 use crate::vfs::vfs_header::{header_from_bytes, ArchiveType, CompressionType};
 use crate::vfs::virtual_file::VirtualFile;
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::cell::RefCell;
 use std::io;
 use std::io::Read;
--- a/lib/runtime-c-api/Cargo.toml
+++ b/lib/runtime-c-api/Cargo.toml
@ -12,7 +12,7 @@ readme = "README.md"
 crate-type = ["cdylib", "rlib", "staticlib"]

 [dependencies]
-libc = "0.2"
+libc = "0.2.60"

 [dependencies.wasmer-runtime]
 path = "../runtime"
@ -27,4 +27,4 @@ debug = ["wasmer-runtime/debug"]
 llvm = ["wasmer-runtime/llvm"]

 [build-dependencies]
-cbindgen = "0.8"
+cbindgen = "0.9.0"
--- a/lib/runtime-c-api/src/import.rs
+++ b/lib/runtime-c-api/src/import.rs
@ -10,9 +10,10 @@ use crate::{
 };
 use libc::c_uint;
 use std::{ffi::c_void, ptr, slice, sync::Arc};
-use wasmer_runtime::Module;
+use wasmer_runtime::{Global, Memory, Module, Table};
 use wasmer_runtime_core::{
    export::{Context, Export, FuncPointer},
+    import::ImportObject,
    module::ImportName,
    types::{FuncSig, Type},
 };
@ -25,6 +26,9 @@ pub struct wasmer_import_t {
    pub value: wasmer_import_export_value,
 }

+#[repr(C)]
+pub struct wasmer_import_object_t;
+
 #[repr(C)]
 #[derive(Clone)]
 pub struct wasmer_import_func_t;
@ -37,6 +41,83 @@ pub struct wasmer_import_descriptor_t;
 #[derive(Clone)]
 pub struct wasmer_import_descriptors_t;

+/// Creates a new empty import object.
+/// See also `wasmer_import_object_append`
+#[allow(clippy::cast_ptr_alignment)]
+#[no_mangle]
+pub unsafe extern "C" fn wasmer_import_object_new() -> *mut wasmer_import_object_t {
+    let import_object = Box::new(ImportObject::new());
+
+    Box::into_raw(import_object) as *mut wasmer_import_object_t
+}
+
+/// Extends an existing import object with new imports
+#[allow(clippy::cast_ptr_alignment)]
+#[no_mangle]
+pub unsafe extern "C" fn wasmer_import_object_extend(
+    import_object: *mut wasmer_import_object_t,
+    imports: *mut wasmer_import_t,
+    imports_len: c_uint,
+) -> wasmer_result_t {
+    let import_object: &mut ImportObject = &mut *(import_object as *mut ImportObject);
+
+    let mut extensions: Vec<(String, String, Export)> = Vec::new();
+
+    let imports: &[wasmer_import_t] = slice::from_raw_parts(imports, imports_len as usize);
+    for import in imports {
+        let module_name = slice::from_raw_parts(
+            import.module_name.bytes,
+            import.module_name.bytes_len as usize,
+        );
+        let module_name = if let Ok(s) = std::str::from_utf8(module_name) {
+            s
+        } else {
+            update_last_error(CApiError {
+                msg: "error converting module name to string".to_string(),
+            });
+            return wasmer_result_t::WASMER_ERROR;
+        };
+        let import_name = slice::from_raw_parts(
+            import.import_name.bytes,
+            import.import_name.bytes_len as usize,
+        );
+        let import_name = if let Ok(s) = std::str::from_utf8(import_name) {
+            s
+        } else {
+            update_last_error(CApiError {
+                msg: "error converting import_name to string".to_string(),
+            });
+            return wasmer_result_t::WASMER_ERROR;
+        };
+
+        let export = match import.tag {
+            wasmer_import_export_kind::WASM_MEMORY => {
+                let mem = import.value.memory as *mut Memory;
+                Export::Memory((&*mem).clone())
+            }
+            wasmer_import_export_kind::WASM_FUNCTION => {
+                let func_export = import.value.func as *mut Export;
+                (&*func_export).clone()
+            }
+            wasmer_import_export_kind::WASM_GLOBAL => {
+                let global = import.value.global as *mut Global;
+                Export::Global((&*global).clone())
+            }
+            wasmer_import_export_kind::WASM_TABLE => {
+                let table = import.value.table as *mut Table;
+                Export::Table((&*table).clone())
+            }
+        };
+
+        let extension = (module_name.to_string(), import_name.to_string(), export);
+        extensions.push(extension)
+    }
+
+    import_object.extend(extensions);
+
+    return wasmer_result_t::WASMER_OK;
+}
+
 /// Gets import descriptors for the given module
 ///
 /// The caller owns the object and should call `wasmer_import_descriptors_destroy` to free it.
@ -352,6 +433,14 @@ pub extern "C" fn wasmer_import_func_destroy(func: *mut wasmer_import_func_t) {
    }
 }

+/// Frees memory of the given ImportObject
+#[no_mangle]
+pub extern "C" fn wasmer_import_object_destroy(import_object: *mut wasmer_import_object_t) {
+    if !import_object.is_null() {
+        unsafe { Box::from_raw(import_object as *mut ImportObject) };
+    }
+}
+
 struct NamedImportDescriptor {
    module: String,
    name: String,
--- a/lib/runtime-c-api/src/instance.rs
+++ b/lib/runtime-c-api/src/instance.rs
@ -3,15 +3,19 @@
 use crate::{
    error::{update_last_error, CApiError},
    export::{wasmer_exports_t, wasmer_import_export_kind, NamedExport, NamedExports},
-    import::wasmer_import_t,
+    import::{wasmer_import_object_t, wasmer_import_t},
    memory::wasmer_memory_t,
+    module::wasmer_module_t,
    value::{wasmer_value, wasmer_value_t, wasmer_value_tag},
    wasmer_result_t,
 };
 use libc::{c_char, c_int, c_void};
 use std::{collections::HashMap, ffi::CStr, slice};
-use wasmer_runtime::{Ctx, Global, ImportObject, Instance, Memory, Table, Value};
-use wasmer_runtime_core::{export::Export, import::Namespace};
+use wasmer_runtime::{Ctx, Global, Instance, Memory, Module, Table, Value};
+use wasmer_runtime_core::{
+    export::Export,
+    import::{ImportObject, Namespace},
+};

 #[repr(C)]
 pub struct wasmer_instance_t;
@ -108,6 +112,45 @@ pub unsafe extern "C" fn wasmer_instantiate(
    wasmer_result_t::WASMER_OK
 }

+/// Given:
+/// * A prepared `wasmer` import-object
+/// * A compiled wasmer module
+///
+/// Instantiates a wasmer instance
+#[no_mangle]
+pub unsafe extern "C" fn wasmer_module_import_instantiate(
+    instance: *mut *mut wasmer_instance_t,
+    module: *const wasmer_module_t,
+    import_object: *const wasmer_import_object_t,
+) -> wasmer_result_t {
+    let import_object: &ImportObject = &*(import_object as *const ImportObject);
+    let module: &Module = &*(module as *const Module);
+
+    let new_instance: Instance = match module.instantiate(import_object) {
+        Ok(instance) => instance,
+        Err(error) => {
+            update_last_error(error);
+            return wasmer_result_t::WASMER_ERROR;
+        }
+    };
+    *instance = Box::into_raw(Box::new(new_instance)) as *mut wasmer_instance_t;
+
+    return wasmer_result_t::WASMER_OK;
+}
+
+/// Extracts the instance's context and returns it.
+#[allow(clippy::cast_ptr_alignment)]
+#[no_mangle]
+pub unsafe extern "C" fn wasmer_instance_context_get(
+    instance: *mut wasmer_instance_t,
+) -> *const wasmer_instance_context_t {
+    let instance_ref = &*(instance as *const Instance);
+
+    let ctx: *const Ctx = instance_ref.context() as *const _;
+
+    ctx as *const wasmer_instance_context_t
+}
+
 /// Calls an instances exported function by `name` with the provided parameters.
 /// Results are set using the provided `results` pointer.
 ///
--- a/lib/runtime-c-api/src/lib.rs
+++ b/lib/runtime-c-api/src/lib.rs
@ -80,8 +80,13 @@
 //!
 //! [wasmer_h]: ./wasmer.h
 //! [wasmer_hh]: ./wasmer.hh
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 extern crate wasmer_runtime;
 extern crate wasmer_runtime_core;

--- a/lib/runtime-c-api/tests/.gitignore
+++ b/lib/runtime-c-api/tests/.gitignore
@ -23,3 +23,5 @@ test-module-imports
 test-module-serialize
 test-tables
 test-validate
+test-context
+test-module-import-instantiate
--- a/lib/runtime-c-api/tests/CMakeLists.txt
+++ b/lib/runtime-c-api/tests/CMakeLists.txt
@ -14,6 +14,8 @@ add_executable(test-module-imports test-module-imports.c)
 add_executable(test-module-serialize test-module-serialize.c)
 add_executable(test-tables test-tables.c)
 add_executable(test-validate test-validate.c)
+add_executable(test-context test-context.c)
+add_executable(test-module-import-instantiate test-module-import-instantiate.c)

 find_library(
        WASMER_LIB NAMES libwasmer_runtime_c_api.dylib libwasmer_runtime_c_api.so libwasmer_runtime_c_api.dll
@ -87,3 +89,11 @@ add_test(test-tables test-tables)
 target_link_libraries(test-validate general ${WASMER_LIB})
 target_compile_options(test-validate PRIVATE ${COMPILER_OPTIONS})
 add_test(test-validate test-validate)
+
+target_link_libraries(test-context general ${WASMER_LIB})
+target_compile_options(test-context PRIVATE ${COMPILER_OPTIONS})
+add_test(test-context test-context)
+
+target_link_libraries(test-module-import-instantiate general ${WASMER_LIB})
+target_compile_options(test-module-import-instantiate PRIVATE ${COMPILER_OPTIONS})
+add_test(test-module-import-instantiate test-module-import-instantiate)
--- a/lib/runtime-c-api/tests/assets/inc.wasm
+++ b/lib/runtime-c-api/tests/assets/inc.wasm
--- a/lib/runtime-c-api/tests/assets/inc.wast
+++ b/lib/runtime-c-api/tests/assets/inc.wast
@ -0,0 +1,12 @@
+(module
+  (func $inc (import "env" "inc"))
+  (func $mul (import "env" "mul"))
+  (func $get (import "env" "get") (result i32))
+
+  (func (export "inc_and_get") (result i32)
+      call $inc
+      call $get)
+
+  (func (export "mul_and_get") (result i32)
+      call $mul
+      call $get))
--- a/lib/runtime-c-api/tests/runtime_c_api_tests.rs
+++ b/lib/runtime-c-api/tests/runtime_c_api_tests.rs
@ -4,19 +4,17 @@ use std::process::Command;
 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, Some("-Wdev -Werror=dev"));
-    run_command("make", project_tests_dir, Some("test"));
+    run_command("cmake", project_tests_dir, vec!["."]);
+    run_command("make", project_tests_dir, vec!["-Wdev", "-Werror=dev"]);
+    run_command("make", project_tests_dir, vec!["test", "ARGS=\"-V\""]);
 }

-fn run_command(command_str: &str, dir: &str, arg: Option<&str>) {
-    println!("Running command: `{}` arg: {:?}", command_str, arg);
+fn run_command(command_str: &str, dir: &str, args: Vec<&str>) {
+    println!("Running command: `{}` args: {:?}", command_str, args);

    let mut command = Command::new(command_str);

-    if let Some(a) = arg {
-        command.arg(a);
-    }
+    command.args(&args);

    command.current_dir(dir);

--- a/lib/runtime-c-api/tests/test-context.c
+++ b/lib/runtime-c-api/tests/test-context.c
@ -0,0 +1,137 @@
+#include <stdio.h>
+#include "../wasmer.h"
+#include <assert.h>
+#include <stdint.h>
+#include <string.h>
+
+typedef struct {
+    int32_t amount;
+    int32_t value;
+} counter_data;
+
+typedef struct {
+    uint8_t* bytes;
+    long bytes_len;
+} wasm_file_t;
+
+wasm_file_t read_wasm_file(const char* file_name) {
+    wasm_file_t wasm_file;
+
+    FILE *file = fopen(file_name, "r");
+    fseek(file, 0, SEEK_END);
+    wasm_file.bytes_len = ftell(file);
+
+    wasm_file.bytes = malloc(wasm_file.bytes_len);
+    fseek(file, 0, SEEK_SET);
+    fread(wasm_file.bytes, 1, wasm_file.bytes_len, file);
+    fclose(file);
+
+    return wasm_file;
+}
+
+void inc_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    data->value = data->value + data->amount;
+}
+
+void mul_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    data->value = data->value * data->amount;
+}
+
+int32_t get_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    return data->value;
+}
+
+counter_data *init_counter(int32_t value, int32_t amount) {
+    counter_data* counter = malloc(sizeof(counter_data));
+    counter->value = value;
+    counter->amount = amount;
+    return counter;
+}
+
+void assert_counter(wasmer_instance_t *instance, int32_t expected) {
+    wasmer_value_t result_one;
+    wasmer_value_t params[] = {};
+    wasmer_value_t results[] = {result_one};
+
+    wasmer_result_t call1_result = wasmer_instance_call(instance, "inc_and_get", params, 0, results, 1);
+    printf("Call result:  %d\n", call1_result);
+    printf("Result: %d\n", results[0].value.I32);
+    assert(results[0].value.I32 == expected);
+    assert(call1_result == WASMER_OK);
+
+    const wasmer_instance_context_t *ctx = wasmer_instance_context_get(instance);
+    counter_data *cd = (counter_data*)wasmer_instance_context_data_get(ctx);
+    assert(cd->value == expected);
+}
+
+wasmer_import_t create_import(char* module_name, char* import_name, wasmer_import_func_t *func) {
+    wasmer_import_t import;
+    wasmer_byte_array module_name_bytes;
+    wasmer_byte_array import_name_bytes;
+
+    module_name_bytes.bytes = (const uint8_t *) module_name;
+    module_name_bytes.bytes_len = strlen(module_name);
+
+    import_name_bytes.bytes = (const uint8_t *) 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;
+
+    return import;
+}
+
+int main()
+{
+    // Prepare Imports
+    wasmer_value_tag inc_params_sig[] = {};
+    wasmer_value_tag inc_returns_sig[] = {};
+    wasmer_import_func_t *inc_func = wasmer_import_func_new((void (*)(void *)) inc_counter, inc_params_sig, 0, inc_returns_sig, 0);
+    wasmer_import_t inc_import = create_import("env", "inc", inc_func);
+
+    wasmer_value_tag mul_params_sig[] = {};
+    wasmer_value_tag mul_returns_sig[] = {};
+    wasmer_import_func_t *mul_func = wasmer_import_func_new((void (*)(void *)) mul_counter, mul_params_sig, 0, mul_returns_sig, 0);
+    wasmer_import_t mul_import = create_import("env", "mul", mul_func);
+
+    wasmer_value_tag get_params_sig[] = {};
+    wasmer_value_tag get_returns_sig[] = {WASM_I32};
+    wasmer_import_func_t *get_func = wasmer_import_func_new((void (*)(void *)) get_counter, get_params_sig, 0, get_returns_sig, 1);
+    wasmer_import_t get_import = create_import("env", "get", get_func);
+
+    wasmer_import_t imports[] = {inc_import, mul_import, get_import};
+
+    // Read the wasm file
+    wasm_file_t wasm_file = read_wasm_file("assets/inc.wasm");
+
+    // Instantiate instance
+    printf("Instantiating\n");
+    wasmer_instance_t *instance = NULL;
+    wasmer_result_t instantiate_res = wasmer_instantiate(&instance, wasm_file.bytes, wasm_file.bytes_len, imports, 3);
+    printf("Compile result:  %d\n", instantiate_res);
+    assert(instantiate_res == WASMER_OK);
+
+    // Init counter
+    counter_data *counter = init_counter(2, 5);
+    wasmer_instance_context_data_set(instance, counter);
+
+    // Run `instance.inc_and_get` and assert
+    assert_counter(instance, 7);
+    assert_counter(instance, 12);
+    assert_counter(instance, 17);
+
+    // Clear resources
+    wasmer_import_func_destroy(inc_func);
+    wasmer_import_func_destroy(get_func);
+    wasmer_instance_destroy(instance);
+    free(counter);
+    free(wasm_file.bytes);
+
+    return 0;
+}
--- a/lib/runtime-c-api/tests/test-exported-memory.c
+++ b/lib/runtime-c-api/tests/test-exported-memory.c
@ -42,8 +42,9 @@ int main()
    assert(export_length == 5);

    // Get the `memory` export.
-    wasmer_export_t *export = wasmer_exports_get(exports, 1);
+    wasmer_export_t *export = wasmer_exports_get(exports, 0);
    wasmer_import_export_kind kind = wasmer_export_kind(export);
+    printf("Wasmer import export kind: %d (Memory is %d)\n", kind, WASM_MEMORY);
    assert(kind == WASM_MEMORY);

    wasmer_byte_array export_name = wasmer_export_name(export);
--- a/lib/runtime-c-api/tests/test-module-import-instantiate.c
+++ b/lib/runtime-c-api/tests/test-module-import-instantiate.c
@ -0,0 +1,149 @@
+#include <stdio.h>
+#include "../wasmer.h"
+#include <assert.h>
+#include <stdint.h>
+#include <string.h>
+
+typedef struct {
+    int32_t amount;
+    int32_t value;
+} counter_data;
+
+typedef struct {
+    uint8_t* bytes;
+    long bytes_len;
+} wasm_file_t;
+
+wasm_file_t read_wasm_file(const char* file_name) {
+    wasm_file_t wasm_file;
+
+    FILE *file = fopen(file_name, "r");
+    fseek(file, 0, SEEK_END);
+    wasm_file.bytes_len = ftell(file);
+
+    wasm_file.bytes = malloc(wasm_file.bytes_len);
+    fseek(file, 0, SEEK_SET);
+    fread(wasm_file.bytes, 1, wasm_file.bytes_len, file);
+    fclose(file);
+
+    return wasm_file;
+}
+
+void inc_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    data->value = data->value + data->amount;
+}
+
+void mul_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    data->value = data->value * data->amount;
+}
+
+int32_t get_counter(wasmer_instance_context_t *ctx) {
+    counter_data* data = (counter_data*)wasmer_instance_context_data_get(ctx);
+    return data->value;
+}
+
+counter_data *init_counter(int32_t value, int32_t amount) {
+    counter_data* counter = malloc(sizeof(counter_data));
+    counter->value = value;
+    counter->amount = amount;
+    return counter;
+}
+
+wasmer_import_t create_import(char* module_name, char* import_name, wasmer_import_func_t *func) {
+    wasmer_import_t import;
+    wasmer_byte_array module_name_bytes;
+    wasmer_byte_array import_name_bytes;
+
+    module_name_bytes.bytes = (const uint8_t *) module_name;
+    module_name_bytes.bytes_len = strlen(module_name);
+
+    import_name_bytes.bytes = (const uint8_t *) 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;
+
+    return import;
+}
+
+int main()
+{
+    // Prepare Imports
+    wasmer_value_tag inc_params_sig[] = {};
+    wasmer_value_tag inc_returns_sig[] = {};
+    wasmer_import_func_t *inc_func = wasmer_import_func_new((void (*)(void *)) inc_counter, inc_params_sig, 0, inc_returns_sig, 0);
+    wasmer_import_t inc_import = create_import("env", "inc", inc_func);
+
+    wasmer_value_tag mul_params_sig[] = {};
+    wasmer_value_tag mul_returns_sig[] = {};
+    wasmer_import_func_t *mul_func = wasmer_import_func_new((void (*)(void *)) mul_counter, mul_params_sig, 0, mul_returns_sig, 0);
+    wasmer_import_t mul_import = create_import("env", "mul", mul_func);
+
+    wasmer_value_tag get_params_sig[] = {};
+    wasmer_value_tag get_returns_sig[] = {WASM_I32};
+    wasmer_import_func_t *get_func = wasmer_import_func_new((void (*)(void *)) get_counter, get_params_sig, 0, get_returns_sig, 1);
+    wasmer_import_t get_import = create_import("env", "get", get_func);
+
+    // Read the wasm file
+    wasm_file_t wasm_file = read_wasm_file("assets/inc.wasm");
+
+    // Compile module
+		wasmer_module_t *module = NULL;
+		wasmer_result_t compile_res = wasmer_compile(&module, wasm_file.bytes, wasm_file.bytes_len);
+		assert(compile_res == WASMER_OK);
+
+		// Prepare Import Object
+    wasmer_import_object_t *import_object = wasmer_import_object_new();
+
+    // First, we import `inc_counter` and `mul_counter`
+    wasmer_import_t imports[] = {inc_import, mul_import};
+    wasmer_result_t extend_res = wasmer_import_object_extend(import_object, imports, 2);
+    assert(extend_res == WASMER_OK);
+
+    // Now, we'll import `inc_counter` and `mul_counter`
+    wasmer_import_t more_imports[] = {get_import};
+    wasmer_result_t extend_res2 = wasmer_import_object_extend(import_object, more_imports, 1);
+    assert(extend_res2 == WASMER_OK);
+
+    // Same `wasmer_import_object_extend` as the first, doesn't affect anything
+    wasmer_result_t extend_res3 = wasmer_import_object_extend(import_object, imports, 2);
+    assert(extend_res3 == WASMER_OK);
+
+    // Instantiate instance
+    printf("Instantiating\n");
+    wasmer_instance_t *instance = NULL;
+    wasmer_result_t instantiate_res = wasmer_module_import_instantiate(&instance, module, import_object);
+    printf("Compile result:  %d\n", instantiate_res);
+    assert(instantiate_res == WASMER_OK);
+
+    // Init counter
+    counter_data *counter = init_counter(2, 5);
+    wasmer_instance_context_data_set(instance, counter);
+
+    wasmer_value_t result_one;
+    wasmer_value_t params[] = {};
+    wasmer_value_t results[] = {result_one};
+
+    wasmer_result_t call1_result = wasmer_instance_call(instance, "inc_and_get", params, 0, results, 1);
+    printf("Call result:  %d\n", call1_result);
+    printf("Result: %d\n", results[0].value.I32);
+
+    wasmer_result_t call2_result = wasmer_instance_call(instance, "mul_and_get", params, 0, results, 1);
+    printf("Call result:  %d\n", call2_result);
+    printf("Result: %d\n", results[0].value.I32);
+
+    // Clear resources
+    wasmer_import_func_destroy(inc_func);
+    wasmer_import_func_destroy(mul_func);
+    wasmer_import_func_destroy(get_func);
+    wasmer_instance_destroy(instance);
+    free(counter);
+    free(wasm_file.bytes);
+
+    return 0;
+}
--- a/lib/runtime-c-api/wasmer.h
+++ b/lib/runtime-c-api/wasmer.h
@ -95,11 +95,7 @@ typedef struct {

 typedef struct {

-} wasmer_instance_t;
-
-typedef struct {
-
-} wasmer_instance_context_t;
+} wasmer_import_object_t;

 typedef struct {

@ -119,6 +115,14 @@ typedef struct {
  wasmer_import_export_value value;
 } wasmer_import_t;

+typedef struct {
+
+} wasmer_instance_t;
+
+typedef struct {
+
+} wasmer_instance_context_t;
+
 typedef struct {
  bool has_some;
  uint32_t some;
@ -392,6 +396,24 @@ wasmer_result_t wasmer_import_func_returns(const wasmer_import_func_t *func,
 wasmer_result_t wasmer_import_func_returns_arity(const wasmer_import_func_t *func,
                                                 uint32_t *result);

+/**
+ * Frees memory of the given ImportObject
+ */
+void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
+
+/**
+ * Extends an existing import object with new imports
+ */
+wasmer_result_t wasmer_import_object_extend(wasmer_import_object_t *import_object,
+                                            wasmer_import_t *imports,
+                                            unsigned int imports_len);
+
+/**
+ * Creates a new empty import object.
+ * See also `wasmer_import_object_append`
+ */
+wasmer_import_object_t *wasmer_import_object_new(void);
+
 /**
 * Calls an instances exported function by `name` with the provided parameters.
 * Results are set using the provided `results` pointer.
@ -417,6 +439,11 @@ void *wasmer_instance_context_data_get(const wasmer_instance_context_t *ctx);
 */
 void wasmer_instance_context_data_set(wasmer_instance_t *instance, void *data_ptr);

+/**
+ * Extracts the instance's context and returns it.
+ */
+const wasmer_instance_context_t *wasmer_instance_context_get(wasmer_instance_t *instance);
+
 /**
 * Gets the memory within the context at the index `memory_idx`.
 * The index is always 0 until multiple memories are supported.
@ -526,6 +553,16 @@ wasmer_result_t wasmer_module_deserialize(wasmer_module_t **module,
 */
 void wasmer_module_destroy(wasmer_module_t *module);

+/**
+ * Given:
+ *  A prepared `wasmer svm` import-object
+ *  A compiled wasmer module
+ * Instantiates a wasmer instance
+ */
+wasmer_result_t wasmer_module_import_instantiate(wasmer_instance_t **instance,
+                                                 const wasmer_module_t *module,
+                                                 const wasmer_import_object_t *import_object);
+
 /**
 * Creates a new Instance from the given module and imports.
 * Returns `wasmer_result_t::WASMER_OK` upon success.
--- a/lib/runtime-c-api/wasmer.hh
+++ b/lib/runtime-c-api/wasmer.hh
@ -91,11 +91,7 @@ struct wasmer_import_func_t {

 };

-struct wasmer_instance_t {
-
-};
-
-struct wasmer_instance_context_t {
+struct wasmer_import_object_t {

 };

@ -117,6 +113,14 @@ struct wasmer_import_t {
  wasmer_import_export_value value;
 };

+struct wasmer_instance_t {
+
+};
+
+struct wasmer_instance_context_t {
+
+};
+
 struct wasmer_limit_option_t {
  bool has_some;
  uint32_t some;
@ -318,6 +322,18 @@ wasmer_result_t wasmer_import_func_returns(const wasmer_import_func_t *func,
 wasmer_result_t wasmer_import_func_returns_arity(const wasmer_import_func_t *func,
                                                 uint32_t *result);

+/// Frees memory of the given ImportObject
+void wasmer_import_object_destroy(wasmer_import_object_t *import_object);
+
+/// Extends an existing import object with new imports
+wasmer_result_t wasmer_import_object_extend(wasmer_import_object_t *import_object,
+                                            wasmer_import_t *imports,
+                                            unsigned int imports_len);
+
+/// Creates a new empty import object.
+/// See also `wasmer_import_object_append`
+wasmer_import_object_t *wasmer_import_object_new();
+
 /// 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.
@ -337,6 +353,9 @@ void *wasmer_instance_context_data_get(const wasmer_instance_context_t *ctx);
 /// passed to all imported function for instance.
 void wasmer_instance_context_data_set(wasmer_instance_t *instance, void *data_ptr);

+/// Extracts the instance's context and returns it.
+const wasmer_instance_context_t *wasmer_instance_context_get(wasmer_instance_t *instance);
+
 /// 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(const wasmer_instance_context_t *ctx,
@ -418,6 +437,14 @@ wasmer_result_t wasmer_module_deserialize(wasmer_module_t **module,
 /// Frees memory for the given Module
 void wasmer_module_destroy(wasmer_module_t *module);

+/// Given:
+///  A prepared `wasmer svm` import-object
+///  A compiled wasmer module
+/// Instantiates a wasmer instance
+wasmer_result_t wasmer_module_import_instantiate(wasmer_instance_t **instance,
+                                                 const wasmer_module_t *module,
+                                                 const wasmer_import_object_t *import_object);
+
 /// Creates a new Instance from the given module and imports.
 /// Returns `wasmer_result_t::WASMER_OK` upon success.
 /// Returns `wasmer_result_t::WASMER_ERROR` upon failure. Use `wasmer_last_error_length`
--- a/lib/runtime-core/Cargo.toml
+++ b/lib/runtime-core/Cargo.toml
@ -8,46 +8,46 @@ repository = "https://github.com/wasmerio/wasmer"
 edition = "2018"

 [dependencies]
-nix = "0.14.0"
+nix = "0.14.1"
 page_size = "0.4.1"
 wasmparser = "0.35.1"
-parking_lot = "0.7.1"
-lazy_static = "1.2.0"
-indexmap = "1.0.2"
+parking_lot = "0.9.0"
+lazy_static = "1.3.0"
 errno = "0.2.4"
-libc = "0.2.49"
+libc = "0.2.60"
 hex = "0.3.2"
-smallvec = "0.6.9"
+smallvec = "0.6.10"
 bincode = "1.1"
 colored = "1.8"

+[dependencies.indexmap]
+version = "1.0.2"
+features = ["serde-1"]
+
 # Dependencies for caching.
 [dependencies.serde]
-version = "1.0"
+version = "1.0.98"
 # This feature is required for serde to support serializing/deserializing reference counted pointers (e.g. Rc and Arc).
 features = ["rc"]
 [dependencies.serde_derive]
-version = "1.0"
+version = "1.0.98"
 [dependencies.serde_bytes]
-version = "0.10"
+version = "0.11.1"
 [dependencies.serde-bench]
 version = "0.0.7"
 [dependencies.blake2b_simd]
-version = "0.4.1"
+version = "0.5.5"
 [dependencies.digest]
-version = "0.8.0"
-[dependencies.hashbrown]
-version = "0.1"
-features = ["serde"]
+version = "0.8.1"

 [target.'cfg(windows)'.dependencies]
-winapi = { version = "0.3", features = ["memoryapi"] }
+winapi = { version = "0.3.7", features = ["memoryapi"] }

 [dev-dependencies]
 field-offset = "0.1.1"

 [build-dependencies]
-blake2b_simd = "0.4.1"
+blake2b_simd = "0.5.5"
 rustc_version = "0.2.3"
 cc = "1.0"

--- a/lib/runtime-core/src/backend.rs
+++ b/lib/runtime-core/src/backend.rs
@ -15,7 +15,7 @@ use crate::{
 };
 use std::{any::Any, ptr::NonNull};

-use hashbrown::HashMap;
+use std::collections::HashMap;

 pub mod sys {
    pub use crate::sys::*;
--- a/lib/runtime-core/src/codegen.rs
+++ b/lib/runtime-core/src/codegen.rs
@ -146,7 +146,7 @@ pub fn validating_parser_config(features: &Features) -> wasmparser::ValidatingPa
            enable_bulk_memory: false,
            enable_multi_value: false,
        },
-        mutable_global_imports: false,
+        mutable_global_imports: true,
    }
 }

--- a/lib/runtime-core/src/error.rs
+++ b/lib/runtime-core/src/error.rs
@ -134,7 +134,7 @@ impl std::fmt::Display for RuntimeError {
    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
        match self {
            RuntimeError::Trap { ref msg } => {
-                write!(f, "WebAssembly trap occured during runtime: {}", msg)
+                write!(f, "WebAssembly trap occurred during runtime: {}", msg)
            }
            RuntimeError::Error { data } => {
                if let Some(s) = data.downcast_ref::<String>() {
--- a/lib/runtime-core/src/export.rs
+++ b/lib/runtime-core/src/export.rs
@ -2,7 +2,7 @@ use crate::{
    global::Global, instance::InstanceInner, memory::Memory, module::ExportIndex,
    module::ModuleInner, table::Table, types::FuncSig, vm,
 };
-use hashbrown::hash_map;
+use indexmap::map::Iter as IndexMapIter;
 use std::sync::Arc;

 #[derive(Debug, Copy, Clone)]
@ -41,7 +41,7 @@ impl FuncPointer {

 pub struct ExportIter<'a> {
    inner: &'a InstanceInner,
-    iter: hash_map::Iter<'a, String, ExportIndex>,
+    iter: IndexMapIter<'a, String, ExportIndex>,
    module: &'a ModuleInner,
 }

--- a/lib/runtime-core/src/import.rs
+++ b/lib/runtime-core/src/import.rs
@ -1,6 +1,6 @@
 use crate::export::Export;
-use hashbrown::{hash_map::Entry, HashMap};
 use std::collections::VecDeque;
+use std::collections::{hash_map::Entry, HashMap};
 use std::{
    cell::{Ref, RefCell},
    ffi::c_void,
--- a/lib/runtime-core/src/lib.rs
+++ b/lib/runtime-core/src/lib.rs
@ -1,4 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #![cfg_attr(nightly, feature(unwind_attributes))]

 #[cfg(test)]
@ -134,7 +140,7 @@ pub fn validate_and_report_errors_with_features(
            enable_reference_types: false,
            enable_threads: false,
        },
-        mutable_global_imports: false,
+        mutable_global_imports: true,
    };
    let mut parser = wasmparser::ValidatingParser::new(wasm, Some(config));
    loop {
--- a/lib/runtime-core/src/module.rs
+++ b/lib/runtime-core/src/module.rs
@ -14,8 +14,8 @@ use crate::{
 };

 use crate::backend::CacheGen;
-use hashbrown::HashMap;
 use indexmap::IndexMap;
+use std::collections::HashMap;
 use std::sync::Arc;

 /// This is used to instantiate a new WebAssembly module.
@ -40,7 +40,7 @@ pub struct ModuleInfo {
    pub imported_tables: Map<ImportedTableIndex, (ImportName, TableDescriptor)>,
    pub imported_globals: Map<ImportedGlobalIndex, (ImportName, GlobalDescriptor)>,

-    pub exports: HashMap<String, ExportIndex>,
+    pub exports: IndexMap<String, ExportIndex>,

    pub data_initializers: Vec<DataInitializer>,
    pub elem_initializers: Vec<TableInitializer>,
--- a/lib/runtime-core/src/parse.rs
+++ b/lib/runtime-core/src/parse.rs
@ -14,7 +14,7 @@ use crate::{
    },
    units::Pages,
 };
-use hashbrown::HashMap;
+use std::collections::HashMap;
 use std::fmt::Debug;
 use std::sync::{Arc, RwLock};
 use wasmparser::{
--- a/lib/runtime-core/src/sig_registry.rs
+++ b/lib/runtime-core/src/sig_registry.rs
@ -2,9 +2,9 @@ use crate::{
    structures::Map,
    types::{FuncSig, SigIndex},
 };
-use hashbrown::HashMap;
 use lazy_static::lazy_static;
 use parking_lot::RwLock;
+use std::collections::HashMap;
 use std::sync::Arc;

 lazy_static! {
--- a/lib/runtime-core/src/state.rs
+++ b/lib/runtime-core/src/state.rs
@ -100,6 +100,7 @@ pub struct InstanceImage {
 }

 impl ModuleStateMap {
+    #[warn(dead_code)]
    fn lookup_call_ip(&self, ip: usize, base: usize) -> Option<(&FunctionStateMap, MachineState)> {
        if ip < base || ip - base >= self.total_size {
            None
@ -123,6 +124,7 @@ impl ModuleStateMap {
        }
    }

+    #[warn(dead_code)]
    fn lookup_trappable_ip(
        &self,
        ip: usize,
@ -150,6 +152,7 @@ impl ModuleStateMap {
        }
    }

+    #[warn(dead_code)]
    fn lookup_loop_ip(&self, ip: usize, base: usize) -> Option<(&FunctionStateMap, MachineState)> {
        if ip < base || ip - base >= self.total_size {
            None
--- a/lib/runtime-core/src/sys/mod.rs
+++ b/lib/runtime-core/src/sys/mod.rs
@ -16,7 +16,7 @@ use serde::{
    Deserialize, Deserializer, Serialize, Serializer,
 };

-use serde_bytes::Bytes;
+use serde_bytes::{ByteBuf, Bytes};

 use std::fmt;

@ -56,7 +56,7 @@ impl<'de> Deserialize<'de> for Memory {
                    .next_element()?
                    .ok_or_else(|| de::Error::invalid_length(0, &self))?;

-                let bytes: Bytes = seq
+                let bytes: ByteBuf = seq
                    .next_element()?
                    .ok_or_else(|| de::Error::invalid_length(1, &self))?;

--- a/lib/runtime-core/src/vm.rs
+++ b/lib/runtime-core/src/vm.rs
@ -14,7 +14,7 @@ use std::{
    sync::Once,
 };

-use hashbrown::HashMap;
+use std::collections::HashMap;

 /// The context of the currently running WebAssembly instance.
 ///
@ -850,8 +850,9 @@ mod vm_ctx_tests {
        use crate::cache::Error as CacheError;
        use crate::typed_func::Wasm;
        use crate::types::{LocalFuncIndex, SigIndex};
-        use hashbrown::HashMap;
+        use indexmap::IndexMap;
        use std::any::Any;
+        use std::collections::HashMap;
        use std::ptr::NonNull;
        struct Placeholder;
        impl RunnableModule for Placeholder {
@ -890,7 +891,7 @@ mod vm_ctx_tests {
                imported_tables: Map::new(),
                imported_globals: Map::new(),

-                exports: HashMap::new(),
+                exports: IndexMap::new(),

                data_initializers: Vec::new(),
                elem_initializers: Vec::new(),
--- a/lib/runtime/Cargo.toml
+++ b/lib/runtime/Cargo.toml
@ -10,7 +10,7 @@ readme = "README.md"

 [dependencies]
 wasmer-singlepass-backend = { path = "../singlepass-backend", version = "0.6.0", optional = true }
-lazy_static = "1.2.0"
+lazy_static = "1.3.0"
 memmap = "0.7.0"

 [dependencies.wasmer-runtime-core]
@ -23,7 +23,7 @@ version = "0.6.0"
 optional = true

 [dev-dependencies]
-tempfile = "3.0.7"
+tempfile = "3.1.0"
 criterion = "0.2"
 wabt = "0.9.0"

--- a/lib/runtime/src/lib.rs
+++ b/lib/runtime/src/lib.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 //! Wasmer-runtime is a library that makes embedding WebAssembly
 //! in your application easy, efficient, and safe.
 //!
--- a/lib/singlepass-backend/Cargo.toml
+++ b/lib/singlepass-backend/Cargo.toml
@ -13,10 +13,9 @@ wasmer-runtime-core = { path = "../runtime-core", version = "0.6.0" }
 wasmparser = "0.35.1"
 dynasm = "0.3.2"
 dynasmrt = "0.3.1"
-lazy_static = "1.2.0"
-byteorder = "1"
-nix = "0.14.0"
-libc = "0.2.49"
-smallvec = "0.6.9"
-hashbrown = "0.1"
+lazy_static = "1.3.0"
+byteorder = "1.3.2"
+nix = "0.14.1"
+libc = "0.2.60"
+smallvec = "0.6.10"
 colored = "1.8"
--- a/lib/singlepass-backend/src/lib.rs
+++ b/lib/singlepass-backend/src/lib.rs
@ -1,4 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #![feature(proc_macro_hygiene)]

 #[cfg(not(any(
--- a/lib/spectests/build/spectests.rs
+++ b/lib/spectests/build/spectests.rs
@ -132,7 +132,7 @@ fn get_compiler() -> impl Compiler {
  CraneliftCompiler::new()
 }

-pub fn generate_imports() -> ImportObject {
+pub fn generate_imports(extra_imports: Vec<(String, Instance)>) -> ImportObject {
    let mut features = wabt::Features::new();
    features.enable_simd();
    let wasm_binary = wat2wasm_with_features(IMPORT_MODULE.as_bytes(), features).expect("WAST not valid or malformed");
@ -143,6 +143,9 @@ pub fn generate_imports() -> ImportObject {
        .expect("WASM can't be instantiated");
    let mut imports = ImportObject::new();
    imports.register("spectest", instance);
+    for (name, instance) in extra_imports {
+        imports.register(name, instance);
+    }
    imports
 }

@ -303,6 +306,8 @@ struct WastTestGenerator {
    script_parser: ScriptParser,
    module_calls: HashMap<i32, Vec<String>>,
    buffer: String,
+    modules_by_name: HashMap<String, i32>,
+    registered_modules: Vec<(i32, String)>,
 }

 impl WastTestGenerator {
@ -322,6 +327,8 @@ impl WastTestGenerator {
            script_parser: script,
            buffer: buffer,
            module_calls: HashMap::new(),
+            modules_by_name: HashMap::new(),
+            registered_modules: Vec::new(),
        }
    }

@ -392,7 +399,7 @@ fn test_module_{}() {{
        self.module_calls.remove(&module);
    }

-    fn visit_module(&mut self, module: &ModuleBinary, _name: &Option<String>) {
+    fn visit_module(&mut self, module: &ModuleBinary, name: &Option<String>) {
        let wasm_binary: Vec<u8> = module.clone().into_vec();
        let mut features = Features::new();
        features.enable_simd();
@ -409,7 +416,9 @@ fn test_module_{}() {{
    println!(\"{{}}\", module_str);
    let wasm_binary = wat2wasm(module_str.as_bytes()).expect(\"WAST not valid or malformed\");
    let module = wasmer_runtime_core::compile_with_config(&wasm_binary[..], &get_compiler(), CompilerConfig {{ features: Features {{ simd: true }}, ..Default::default() }}).expect(\"WASM can't be compiled\");
-    module.instantiate(&generate_imports()).expect(\"WASM can't be instantiated\")
+    let mut extra_imports = Vec::new();
+    {}
+    module.instantiate(&generate_imports(extra_imports)).expect(\"WASM can't be instantiated\")
 }}\n",
                self.last_module,
                // We do this to ident four spaces, so it looks aligned to the function body
@ -417,9 +426,22 @@ fn test_module_{}() {{
                    .replace("\n", "\n    ")
                    .replace("\\", "\\\\")
                    .replace("\"", "\\\""),
+                self.registered_modules.iter().map(|(number, name)| format!("extra_imports.push((String::from(\"{}\"), create_module_{}()));", name, number)).fold(String::from(""), |acc, x| format!("{}{}\n", acc, x)),
            )
            .as_str(),
        );
+        if let Some(name) = name {
+            self.record_named_module(name);
+        }
+    }
+
+    fn record_named_module(&mut self, name: &String) {
+        self.modules_by_name.insert(name.clone(), self.last_module);
+    }
+
+    fn visit_register_module(&mut self, name: &String, as_name: &String) {
+        self.registered_modules
+            .push((*self.modules_by_name.get(name).unwrap(), as_name.clone()));
    }

    fn visit_assert_invalid(&mut self, module: &ModuleBinary) {
@ -763,11 +785,8 @@ fn {}() {{
            } => {
                // Do nothing for now
            }
-            CommandKind::Register {
-                name: _,
-                as_name: _,
-            } => {
-                // Do nothing for now
+            CommandKind::Register { name, as_name } => {
+                self.visit_register_module(name.as_ref().unwrap(), as_name);
            }
            CommandKind::PerformAction(action) => {
                self.visit_perform_action(action);
--- a/lib/spectests/spectests/README.md
+++ b/lib/spectests/spectests/README.md
@ -25,7 +25,7 @@ Currently supported command assertions:
 - [x] `assert_malformed` _fully implemented_
 - [ ] `assert_uninstantiable` _not implemented yet_
 - [ ] `assert_exhaustion` _not implemented yet_
- [ ] `register` _not implemented yet_
+- [x] `register` _fully implemented_
 - [x] `perform_action` _partially implemented, only function invocations for now_

 ### Covered spec tests
@ -86,6 +86,7 @@ The following spec tests are currently covered:
 - [x] return.wast
 - [x] select.wast
 - [x] set_local.wast
+- [x] simd.wast
 - [ ] skip-stack-guard-page.wast
 - [x] stack.wast
 - [x] start.wast
@ -108,8 +109,6 @@ The following spec tests are currently covered:

 There are some cases that we decided to skip for now to accelerate the release schedule:

- `SKIP_MUTABLE_GLOBALS`: Right now the Wasm parser can't validate a module with imported/exported `mut` globals. We decided to skip the tests until Cranelift and wasmparser can handle this (see [original spec proposal](https://github.com/WebAssembly/mutable-global)). Spec tests affected:
-  - `globals.wast`
 - `SKIP_CALL_INDIRECT_TYPE_MISMATCH`: we implemented traps in a fast way. We haven't yet covered the type mismatch on `call_indirect`. Specs affected:

  - `call_indirect.wast`
--- a/lib/spectests/spectests/data.wast
+++ b/lib/spectests/spectests/data.wast
@ -47,31 +47,27 @@
  (data (i32.const 1) "h")
 )

-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global (import "spectest" "global_i32") i32)
-;;   (memory 1)
-;;   (data (get_global 0) "a")
-;; )
-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global (import "spectest" "global_i32") i32)
-;;   (import "spectest" "memory" (memory 1))
-;;   (data (get_global 0) "a")
-;; )
+(module
+  (global (import "spectest" "global_i32") i32)
+  (memory 1)
+  (data (get_global 0) "a")
+)
+(module
+  (global (import "spectest" "global_i32") i32)
+  (import "spectest" "memory" (memory 1))
+  (data (get_global 0) "a")
+)

-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global $g (import "spectest" "global_i32") i32)
-;;   (memory 1)
-;;   (data (get_global $g) "a")
-;; )
-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global $g (import "spectest" "global_i32") i32)
-;;   (import "spectest" "memory" (memory 1))
-;;   (data (get_global $g) "a")
-;; )
+(module
+  (global $g (import "spectest" "global_i32") i32)
+  (memory 1)
+  (data (get_global $g) "a")
+)
+(module
+  (global $g (import "spectest" "global_i32") i32)
+  (import "spectest" "memory" (memory 1))
+  (data (get_global $g) "a")
+)

 ;; Use of internal globals in constant expressions is not allowed in MVP.
 ;; (module (memory 1) (data (get_global 0) "a") (global i32 (i32.const 0)))
@ -138,19 +134,17 @@
  (data (i32.const 0) "a")
 )

-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global (import "spectest" "global_i32") i32)
-;;   (import "spectest" "memory" (memory 0))
-;;   (data (get_global 0) "a")
-;; )
+(module
+  (global (import "spectest" "global_i32") i32)
+  (import "spectest" "memory" (memory 0))
+  (data (get_global 0) "a")
+)

-;; SKIP_MUTABLE_GLOBALS
-;; (module
-;;   (global (import "spectest" "global_i32") i32)
-;;   (import "spectest" "memory" (memory 0 3))
-;;   (data (get_global 0) "a")
-;; )
+(module
+  (global (import "spectest" "global_i32") i32)
+  (import "spectest" "memory" (memory 0 3))
+  (data (get_global 0) "a")
+)

 (module
  (import "spectest" "memory" (memory 0))
--- a/lib/spectests/spectests/globals.wast
+++ b/lib/spectests/spectests/globals.wast
@ -246,11 +246,9 @@
 )

 ;; mutable globals can be exported
-;; SKIP_MUTABLE_GLOBALS
-;; (module (global (mut f32) (f32.const 0)) (export "a" (global 0)))
+(module (global (mut f32) (f32.const 0)) (export "a" (global 0)))

-;; SKIP_MUTABLE_GLOBALS
-;; (module (global (export "a") (mut f32) (f32.const 0)))
+(module (global (export "a") (mut f32) (f32.const 0)))

 (assert_invalid
  (module (global f32 (f32.neg (f32.const 0))))
--- a/lib/spectests/spectests/simd.wast
+++ b/lib/spectests/spectests/simd.wast
@ -9,49 +9,48 @@

 ;; v128 globals

-;; wasmer silently doesn't implement (register) yet
-;;(module $M
-;;  (global (export "a") v128       (v128.const f32x4 0.0 1.0 2.0 3.0))
-;;  (global (export "b") (mut v128) (v128.const f32x4 4.0 5.0 6.0 7.0))
-;;)
-;;(register "M" $M)
+(module $M
+  (global (export "a") v128       (v128.const f32x4 0.0 1.0 2.0 3.0))
+  (global (export "b") (mut v128) (v128.const f32x4 4.0 5.0 6.0 7.0))
+)
+(register "M" $M)

 (module
-;;  (global $a (import "M" "a") v128)
-;;  (global $b (import "M" "b") (mut v128))
+  (global $a (import "M" "a") v128)
+  (global $b (import "M" "b") (mut v128))

-;;  (global $c v128       (global.get $a))
+  (global $c v128       (global.get $a))
  (global $d v128       (v128.const i32x4 8 9 10 11))
-;;  (global $e (mut v128) (global.get $a))
-;;  (global $f (mut v128) (v128.const i32x4 12 13 14 15))
+  (global $e (mut v128) (global.get $a))
+  (global $f (mut v128) (v128.const i32x4 12 13 14 15))

-;;  (func (export "get-a") (result v128) (global.get $a))
-;;  (func (export "get-b") (result v128) (global.get $b))
-;;  (func (export "get-c") (result v128) (global.get $c))
+  (func (export "get-a") (result v128) (global.get $a))
+  (func (export "get-b") (result v128) (global.get $b))
+  (func (export "get-c") (result v128) (global.get $c))
  (func (export "get-d") (result v128) (global.get $d))
-;;  (func (export "get-e") (result v128) (global.get $e))
-;;  (func (export "get-f") (result v128) (global.get $f))
+  (func (export "get-e") (result v128) (global.get $e))
+  (func (export "get-f") (result v128) (global.get $f))

-;;  (func (export "set-b") (param $value v128) (global.set $b (local.get $value)))
-;;  (func (export "set-e") (param $value v128) (global.set $e (local.get $value)))
-;;  (func (export "set-f") (param $value v128) (global.set $f (local.get $value)))
+  (func (export "set-b") (param $value v128) (global.set $b (local.get $value)))
+  (func (export "set-e") (param $value v128) (global.set $e (local.get $value)))
+  (func (export "set-f") (param $value v128) (global.set $f (local.get $value)))
 )

-;;(assert_return (invoke "get-a") (v128.const f32x4 0.0 1.0 2.0 3.0))
-;;(assert_return (invoke "get-b") (v128.const f32x4 4.0 5.0 6.0 7.0))
-;;(assert_return (invoke "get-c") (v128.const f32x4 0.0 1.0 2.0 3.0))
+(assert_return (invoke "get-a") (v128.const f32x4 0.0 1.0 2.0 3.0))
+(assert_return (invoke "get-b") (v128.const f32x4 4.0 5.0 6.0 7.0))
+(assert_return (invoke "get-c") (v128.const f32x4 0.0 1.0 2.0 3.0))
 (assert_return (invoke "get-d") (v128.const i32x4 8 9 10 11))
-;;(assert_return (invoke "get-e") (v128.const f32x4 0.0 1.0 2.0 3.0))
-;;(assert_return (invoke "get-f") (v128.const i32x4 12 13 14 15))
+(assert_return (invoke "get-e") (v128.const f32x4 0.0 1.0 2.0 3.0))
+(assert_return (invoke "get-f") (v128.const i32x4 12 13 14 15))

-;;(invoke "set-b" (v128.const f64x2 nan:0x1 nan:0x2))
-;;(assert_return (invoke "get-b") (v128.const f64x2 nan:0x1 nan:0x2))
-;;
-;;(invoke "set-e" (v128.const f64x2 -nan:0x3 +inf))
-;;(assert_return (invoke "get-e") (v128.const f64x2 -nan:0x3 +inf))
-;;
-;;(invoke "set-f" (v128.const f32x4 -inf +3.14 10.0e30 +nan:0x42))
-;;(assert_return (invoke "get-f") (v128.const f32x4 -inf +3.14 10.0e30 +nan:0x42))
+(invoke "set-b" (v128.const f64x2 nan:0x1 nan:0x2))
+(assert_return (invoke "get-b") (v128.const f64x2 nan:0x1 nan:0x2))
+
+(invoke "set-e" (v128.const f64x2 -nan:0x3 +inf))
+(assert_return (invoke "get-e") (v128.const f64x2 -nan:0x3 +inf))
+
+(invoke "set-f" (v128.const f32x4 -inf +3.14 10.0e30 +nan:0x42))
+(assert_return (invoke "get-f") (v128.const f32x4 -inf +3.14 10.0e30 +nan:0x42))

 (assert_invalid (module (global v128 (i32.const 0))) "invalid initializer expression")
 (assert_invalid (module (global v128 (i64.const 0))) "invalid initializer expression")
--- a/lib/wasi-tests/Cargo.toml
+++ b/lib/wasi-tests/Cargo.toml
@ -17,7 +17,7 @@ wasmer-llvm-backend = { path = "../llvm-backend", version = "0.6.0", optional =


 [build-dependencies]
-glob = "0.2.11"
+glob = "0.3.0"

 [dev-dependencies]
 wasmer-clif-backend = { path = "../clif-backend", version = "0.6.0" }
--- a/lib/wasi/Cargo.toml
+++ b/lib/wasi/Cargo.toml
@ -9,13 +9,12 @@ edition = "2018"

 [dependencies]
 wasmer-runtime-core = { path = "../runtime-core", version = "0.6.0" }
-libc = "0.2.50"
-rand = "0.6.5"
+libc = "0.2.60"
+rand = "0.7.0"
 # wasmer-runtime-abi = { path = "../runtime-abi" }
-hashbrown = "0.1.8"
 generational-arena = "0.2.2"
-log = "0.4.6"
-byteorder = "1.3.1"
+log = "0.4.8"
+byteorder = "1.3.2"

 [target.'cfg(windows)'.dependencies]
-winapi = "0.3"
+winapi = "0.3.7"
--- a/lib/wasi/src/lib.rs
+++ b/lib/wasi/src/lib.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #[cfg(target = "windows")]
 extern crate winapi;

--- a/lib/wasi/src/state.rs
+++ b/lib/wasi/src/state.rs
@ -8,7 +8,7 @@
 use crate::syscalls::types::*;
 use generational_arena::Arena;
 pub use generational_arena::Index as Inode;
-use hashbrown::hash_map::HashMap;
+use std::collections::HashMap;
 use std::{
    borrow::Borrow,
    cell::Cell,
--- a/lib/win-exception-handler/Cargo.toml
+++ b/lib/win-exception-handler/Cargo.toml
@ -9,10 +9,10 @@ edition = "2018"

 [target.'cfg(windows)'.dependencies]
 wasmer-runtime-core = { path = "../runtime-core", version = "0.6.0" }
-winapi = { version = "0.3", features = ["winbase", "errhandlingapi", "minwindef", "minwinbase", "winnt"] }
-libc = "0.2.49"
+winapi = { version = "0.3.7", features = ["winbase", "errhandlingapi", "minwindef", "minwinbase", "winnt"] }
+libc = "0.2.60"

 [build-dependencies]
-cmake = "0.1.35"
-bindgen = "0.46.0"
-regex = "1.0.6"
+cmake = "0.1.40"
+bindgen = "0.51.0"
+regex = "1.2.0"
--- a/lib/win-exception-handler/src/lib.rs
+++ b/lib/win-exception-handler/src/lib.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #[cfg(windows)]
 mod exception_handling;

--- a/src/bin/kwasmd.rs
+++ b/src/bin/kwasmd.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 extern crate byteorder;
 extern crate structopt;

--- a/src/bin/wasmer.rs
+++ b/src/bin/wasmer.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 extern crate structopt;

 use std::env;
@ -10,7 +15,7 @@ use std::path::PathBuf;
 use std::process::exit;
 use std::str::FromStr;

-use hashbrown::HashMap;
+use std::collections::HashMap;
 use structopt::StructOpt;

 use wasmer::*;
--- a/src/lib.rs
+++ b/src/lib.rs
@ -1,5 +1,10 @@
-#![deny(unused_imports, unused_variables, unused_unsafe, unreachable_patterns)]
-
+#![deny(
+    dead_code,
+    unused_imports,
+    unused_variables,
+    unused_unsafe,
+    unreachable_patterns
+)]
 #[macro_use]
 extern crate wasmer_runtime_core;
 // extern crate wasmer_emscripten;