diff --git a/crates/svm-core/Cargo.lock b/crates/svm-core/Cargo.lock
index 7be90c1bf..46d9325d1 100644
--- a/crates/svm-core/Cargo.lock
+++ b/crates/svm-core/Cargo.lock
@@ -1,12 +1,9 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
 [[package]]
-name = "ansi_term"
-version = "0.11.0"
+name = "approx"
+version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "arrayref"
@@ -15,26 +12,26 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "arrayvec"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "nodrop 0.1.13 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "atty"
-version = "0.2.11"
+name = "autocfg"
+version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)",
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
-name = "autocfg"
-version = "0.1.4"
+name = "bincode"
+version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "bitflags"
@@ -47,7 +44,7 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "arrayref 0.3.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "arrayvec 0.4.10 (registry+https://github.com/rust-lang/crates.io-index)",
+ "arrayvec 0.4.11 (registry+https://github.com/rust-lang/crates.io-index)",
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "constant_time_eq 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -57,32 +54,6 @@ name = "byteorder"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "c2-chacha"
-version = "0.2.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "ppv-lite86 0.2.5 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "cbindgen"
-version = "0.8.7"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "clap 2.33.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "log 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
- "serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)",
- "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
- "tempfile 3.1.0 (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 = "1.0.37"
@@ -94,17 +65,13 @@ version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
-name = "clap"
-version = "2.33.0"
+name = "cgmath"
+version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "ansi_term 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "atty 0.2.11 (registry+https://github.com/rust-lang/crates.io-index)",
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)",
- "vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "approx 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -123,6 +90,15 @@ dependencies = [
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "colored"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.3"
@@ -151,7 +127,7 @@ dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -171,7 +147,7 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "errno-dragonfly 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -181,7 +157,7 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -202,15 +178,6 @@ dependencies = [
  "typenum 1.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "getrandom"
-version = "0.1.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "glob"
 version = "0.2.11"
@@ -254,13 +221,10 @@ dependencies = [
 name = "lazy_static"
 version = "1.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "libc"
-version = "0.2.58"
+version = "0.2.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -272,20 +236,12 @@ dependencies = [
  "scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "log"
-version = "0.4.6"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "memmap"
 version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -294,43 +250,42 @@ name = "memmap"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
 name = "nix"
-version = "0.12.1"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "nix"
-version = "0.13.1"
+name = "nodrop"
+version = "0.1.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
-name = "nodrop"
-version = "0.1.13"
+name = "num-traits"
+version = "0.1.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
-name = "numtoa"
-version = "0.1.0"
+name = "num-traits"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "owning_ref"
@@ -354,7 +309,7 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -372,18 +327,13 @@ name = "parking_lot_core"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "ppv-lite86"
-version = "0.2.5"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "proc-macro2"
 version = "0.4.30"
@@ -394,19 +344,31 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "0.6.12"
+version = "0.6.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand"
+version = "0.4.6"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_chacha 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -418,18 +380,6 @@ dependencies = [
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rand"
-version = "0.7.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_chacha 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rand_chacha"
 version = "0.1.1"
@@ -439,16 +389,6 @@ dependencies = [
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rand_chacha"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "c2-chacha 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rand_core"
 version = "0.3.1"
@@ -462,14 +402,6 @@ name = "rand_core"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "rand_core"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "getrandom 0.1.6 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rand_hc"
 version = "0.1.0"
@@ -478,14 +410,6 @@ dependencies = [
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "rand_hc"
-version = "0.2.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "rand_isaac"
 version = "0.1.1"
@@ -499,7 +423,7 @@ name = "rand_jitter"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
@@ -511,7 +435,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "cloudabi 0.0.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.58 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -543,25 +467,9 @@ dependencies = [
 ]
 
 [[package]]
-name = "redox_syscall"
-version = "0.1.56"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
-[[package]]
-name = "redox_termios"
-version = "0.1.1"
+name = "rgb"
+version = "0.8.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
-[[package]]
-name = "remove_dir_all"
-version = "0.5.2"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "rustc_version"
@@ -598,9 +506,6 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 name = "serde"
 version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
-]
 
 [[package]]
 name = "serde-bench"
@@ -625,7 +530,7 @@ version = "1.0.94"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -644,21 +549,11 @@ name = "smallvec"
 version = "0.6.10"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "spin"
-version = "0.5.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "stable_deref_trait"
 version = "1.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "strsim"
-version = "0.8.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-
 [[package]]
 name = "svm-common"
 version = "0.0.0"
@@ -672,10 +567,9 @@ version = "0.0.1"
 dependencies = [
  "svm-storage 0.0.0",
  "wabt 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasmer-runtime 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
- "wasmer-runtime-c-api 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
- "wasmer-runtime-core 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
- "wasmer-singlepass-backend 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
+ "wasmer-runtime 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
+ "wasmer-runtime-core 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
+ "wasmer-singlepass-backend 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
  "wasmparser 0.31.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -692,7 +586,7 @@ version = "0.15.39"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -701,38 +595,6 @@ name = "take_mut"
 version = "0.2.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
-[[package]]
-name = "tempfile"
-version = "3.1.0"
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 [[package]]
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 [[package]]
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-"checksum rand_core 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "615e683324e75af5d43d8f7a39ffe3ee4a9dc42c5c701167a71dc59c3a493aca"
 "checksum rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7b40677c7be09ae76218dc623efbf7b18e34bced3f38883af07bb75630a21bc4"
-"checksum rand_hc 0.2.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ca3129af7b92a17112d59ad498c6f81eaf463253766b90396d39ea7a39d6613c"
 "checksum rand_isaac 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "ded997c9d5f13925be2a6fd7e66bf1872597f759fd9dd93513dd7e92e5a5ee08"
 "checksum rand_jitter 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)" = "1166d5c91dc97b88d1decc3285bb0a99ed84b05cfd0bc2341bdf2d43fc41e39b"
 "checksum rand_os 0.1.3 (registry+https://github.com/rust-lang/crates.io-index)" = "7b75f676a1e053fc562eafbb47838d67c84801e38fc1ba459e8f180deabd5071"
 "checksum rand_pcg 0.1.2 (registry+https://github.com/rust-lang/crates.io-index)" = "abf9b09b01790cfe0364f52bf32995ea3c39f4d2dd011eac241d2914146d0b44"
 "checksum rand_xorshift 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "cbf7e9e623549b0e21f6e97cf8ecf247c1a8fd2e8a992ae265314300b2455d5c"
 "checksum rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "678054eb77286b51581ba43620cc911abf02758c91f93f479767aed0f90458b2"
-"checksum redox_syscall 0.1.56 (registry+https://github.com/rust-lang/crates.io-index)" = "2439c63f3f6139d1b57529d16bc3b8bb855230c8efcc5d3a896c8bea7c3b1e84"
-"checksum redox_termios 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "7e891cfe48e9100a70a3b6eb652fef28920c117d366339687bd5576160db0f76"
-"checksum remove_dir_all 0.5.2 (registry+https://github.com/rust-lang/crates.io-index)" = "4a83fa3702a688b9359eccba92d153ac33fd2e8462f9e0e3fdf155239ea7792e"
+"checksum rgb 0.8.13 (registry+https://github.com/rust-lang/crates.io-index)" = "4f089652ca87f5a82a62935ec6172a534066c7b97be003cc8f702ee9a7a59c92"
 "checksum rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)" = "138e3e0acb6c9fb258b19b67cb8abd63c00679d2851805ea151465464fe9030a"
 "checksum ryu 1.0.0 (registry+https://github.com/rust-lang/crates.io-index)" = "c92464b447c0ee8c4fb3824ecc8383b81717b9f1e74ba2e72540aef7b9f82997"
 "checksum scopeguard 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)" = "94258f53601af11e6a49f722422f6e3425c52b06245a5cf9bc09908b174f5e27"
@@ -979,31 +818,23 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 "checksum serde_derive 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)" = "ef45eb79d6463b22f5f9e16d283798b7c0175ba6050bc25c1a946c122727fe7b"
 "checksum serde_json 1.0.40 (registry+https://github.com/rust-lang/crates.io-index)" = "051c49229f282f7c6f3813f8286cc1e3323e8051823fce42c7ea80fe13521704"
 "checksum smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)" = "ab606a9c5e214920bb66c458cd7be8ef094f813f20fe77a54cc7dbfff220d4b7"
-"checksum spin 0.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "44363f6f51401c34e7be73db0db371c04705d35efbe9f7d6082e03a921a32c55"
 "checksum stable_deref_trait 1.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "dba1a27d3efae4351c8051072d619e3ade2820635c3958d826bfea39d59b54c8"
-"checksum strsim 0.8.0 (registry+https://github.com/rust-lang/crates.io-index)" = "8ea5119cdb4c55b55d432abb513a0429384878c15dde60cc77b1c99de1a95a6a"
 "checksum syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)" = "b4d960b829a55e56db167e861ddb43602c003c7be0bee1d345021703fac2fb7c"
 "checksum take_mut 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)" = "f764005d11ee5f36500a149ace24e00e3da98b0158b3e2d53a7495660d3f4d60"
-"checksum tempfile 3.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "7a6e24d9338a0a5be79593e2fa15a648add6138caa803e2d5bc782c371732ca9"
-"checksum termion 1.5.3 (registry+https://github.com/rust-lang/crates.io-index)" = "6a8fb22f7cde82c8220e5aeacb3258ed7ce996142c77cba193f203515e26c330"
-"checksum textwrap 0.11.0 (registry+https://github.com/rust-lang/crates.io-index)" = "d326610f408c7a4eb6f51c37c330e496b08506c9457c9d34287ecc38809fb060"
 "checksum tiny-keccak 1.5.0 (registry+https://github.com/rust-lang/crates.io-index)" = "1d8a021c69bb74a44ccedb824a046447e2c84a01df9e5c20779750acb38e11b2"
-"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 unicode-width 0.1.5 (registry+https://github.com/rust-lang/crates.io-index)" = "882386231c45df4700b275c7ff55b6f3698780a650026380e72dabe76fa46526"
 "checksum unicode-xid 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)" = "fc72304796d0818e357ead4e000d19c9c174ab23dc11093ac919054d20a6a7fc"
-"checksum vec_map 0.8.1 (registry+https://github.com/rust-lang/crates.io-index)" = "05c78687fb1a80548ae3250346c3db86a80a7cdd77bda190189f2d0a0987c81a"
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 "checksum wabt 0.7.4 (registry+https://github.com/rust-lang/crates.io-index)" = "74e463a508e390cc7447e70f640fbf44ad52e1bd095314ace1fdf99516d32add"
 "checksum wabt-sys 0.5.4 (registry+https://github.com/rust-lang/crates.io-index)" = "a6265b25719e82598d104b3717375e37661d41753e2c84cde3f51050c7ed7e3c"
-"checksum wasmer-runtime 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)" = "<none>"
-"checksum wasmer-runtime-c-api 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)" = "<none>"
-"checksum wasmer-runtime-core 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)" = "<none>"
-"checksum wasmer-singlepass-backend 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)" = "<none>"
-"checksum wasmparser 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)" = "981a8797cf89762e0233ec45fae731cb79a4dfaee12d9f0fe6cee01e4ac58d00"
+"checksum wasmer-runtime 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
+"checksum wasmer-runtime-core 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
+"checksum wasmer-singlepass-backend 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
 "checksum wasmparser 0.31.1 (registry+https://github.com/rust-lang/crates.io-index)" = "8a6f324afc05fd8282bbc49dae854a1c20f74aeff10a575b5a43453d1864db97"
+"checksum wasmparser 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)" = "22d1801de30f112ddaf665291097694ee33a36d1cb414b53a921d05b3519674a"
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 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+"checksum winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef84b96d10db72dd980056666d7f1e7663ce93d82fa33b63e71c966f4cf5032"
diff --git a/crates/svm-core/Cargo.toml b/crates/svm-core/Cargo.toml
index 66623bc44..cafd344d4 100644
--- a/crates/svm-core/Cargo.toml
+++ b/crates/svm-core/Cargo.toml
@@ -11,13 +11,22 @@ description = "Spacemesh Virtual Machine"
 publish = false
 
 [dependencies]
-wasmer-runtime = { git = "https://github.com/yaronwittenstein/wasmer" }
-wasmer-runtime-core = { git = "https://github.com/yaronwittenstein/wasmer" }
-wasmer-runtime-c-api = { git = "https://github.com/yaronwittenstein/wasmer" }
-wasmer-singlepass-backend = { git = "https://github.com/yaronwittenstein/wasmer" }
+wasmer-singlepass-backend = { git = "https://github.com/yaronwittenstein/wasmer", branch = "ctx-drop-finalizer" }
 wasmparser = "0.31.1"
 svm-storage = { path = "../svm-storage/" }
 
+[dependencies.wasmer-runtime]
+default-features = false
+git = "https://github.com/yaronwittenstein/wasmer"
+branch = "ctx-drop-finalizer"
+features = ["singlepass"]
+
+[dependencies.wasmer-runtime-core]
+default-features = false
+git = "https://github.com/yaronwittenstein/wasmer"
+branch = "ctx-drop-finalizer"
+features = ["backend-singlepass"]
+
 [dev-dependencies]
 wabt = "0.7.4"
 
diff --git a/crates/svm-core/src/lib.rs b/crates/svm-core/src/lib.rs
index 9ffa33318..23ab78d39 100644
--- a/crates/svm-core/src/lib.rs
+++ b/crates/svm-core/src/lib.rs
@@ -8,6 +8,5 @@
 mod compiler;
 
 mod middleware;
-mod vm;
 
 pub use compiler::compile_program;
diff --git a/crates/svm-core/src/middleware/validation.rs b/crates/svm-core/src/middleware/validation.rs
index 9db953e89..c50af919c 100644
--- a/crates/svm-core/src/middleware/validation.rs
+++ b/crates/svm-core/src/middleware/validation.rs
@@ -159,8 +159,6 @@ mod tests {
 
     #[test]
     fn test_parser_floats_are_not_supported() {
-        let compiler = svm_compiler!();
-
         let input = r#"
             (module
                 (func $to_float (param i32) (result f32)
diff --git a/crates/svm-core/src/vm.rs b/crates/svm-core/src/vm.rs
deleted file mode 100644
index 0938e752a..000000000
--- a/crates/svm-core/src/vm.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-/// this file will contain the `svm` functions that will be auto-imported into each `wasm` smart contract program
-use wasmer_runtime::{func, imports, Ctx, ImportObject};
-
-/// temporary vm system calls. The real vm system calls will be:
-/// * crypto hashes (for example: sha3)
-/// * contract storage (`store_kv` / `get_kv`)
-/// * gas metering
-
-#[doc(hidden)]
-pub fn syscall_1(_ctx: &mut Ctx) -> i32 {
-    return 10;
-}
-
-#[doc(hidden)]
-pub fn syscall_2(_ctx: &mut Ctx, _a: i32, _b: i32) -> i32 {
-    return 10;
-}
-
-/// this function receives an `import_object` and adds it the `svm` system calls
-#[allow(unused)]
-fn import_system_calls(import_object: &mut ImportObject) {
-    let system_calls = imports! {
-        "svm" => {
-            "syscall_1" => func!(syscall_1),
-            "syscall_2" => func!(syscall_2),
-        },
-    };
-
-    import_object.extend(system_calls);
-}
diff --git a/crates/svm-wasmer/Cargo.lock b/crates/svm-wasmer/Cargo.lock
index 0363b03c1..7346de7a1 100644
--- a/crates/svm-wasmer/Cargo.lock
+++ b/crates/svm-wasmer/Cargo.lock
@@ -1,5 +1,10 @@
 # This file is automatically @generated by Cargo.
 # It is not intended for manual editing.
+[[package]]
+name = "approx"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "arrayref"
 version = "0.3.5"
@@ -18,6 +23,16 @@ name = "autocfg"
 version = "0.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "bincode"
+version = "1.1.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+ "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "serde 1.0.94 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "bitflags"
 version = "1.1.0"
@@ -49,6 +64,16 @@ name = "cfg-if"
 version = "0.1.9"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
+[[package]]
+name = "cgmath"
+version = "0.16.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "approx 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.1.43 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand 0.4.6 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "cloudabi"
 version = "0.0.3"
@@ -65,6 +90,15 @@ dependencies = [
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "colored"
+version = "1.8.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "constant_time_eq"
 version = "0.1.3"
@@ -93,7 +127,7 @@ dependencies = [
  "lazy_static 1.3.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "owning_ref 0.3.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
  "syn 0.15.39 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -113,7 +147,7 @@ version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "errno-dragonfly 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -123,7 +157,7 @@ version = "0.1.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "gcc 0.3.55 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
@@ -190,7 +224,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
 name = "libc"
-version = "0.2.59"
+version = "0.2.60"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -207,7 +241,7 @@ name = "memmap"
 version = "0.6.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -216,46 +250,42 @@ name = "memmap"
 version = "0.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
-[[package]]
-name = "memoffset"
-version = "0.4.0"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-dependencies = [
- "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
-]
-
 [[package]]
 name = "nix"
-version = "0.12.1"
+version = "0.14.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
  "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "nix"
-version = "0.13.1"
+name = "nodrop"
+version = "0.1.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
+[[package]]
+name = "num-traits"
+version = "0.1.43"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "bitflags 1.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
- "cc 1.0.37 (registry+https://github.com/rust-lang/crates.io-index)",
- "cfg-if 0.1.9 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
- "void 1.0.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "num-traits 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
-name = "nodrop"
-version = "0.1.13"
+name = "num-traits"
+version = "0.2.8"
 source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
+]
 
 [[package]]
 name = "owning_ref"
@@ -279,7 +309,7 @@ version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "kernel32-sys 0.2.2 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
@@ -297,7 +327,7 @@ name = "parking_lot_core"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand 0.6.5 (registry+https://github.com/rust-lang/crates.io-index)",
  "rustc_version 0.2.3 (registry+https://github.com/rust-lang/crates.io-index)",
  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -314,19 +344,31 @@ dependencies = [
 
 [[package]]
 name = "quote"
-version = "0.6.12"
+version = "0.6.13"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rand"
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+source = "registry+https://github.com/rust-lang/crates.io-index"
+dependencies = [
+ "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
+]
+
 [[package]]
 name = "rand"
 version = "0.6.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
  "autocfg 0.1.4 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
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  "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_hc 0.1.0 (registry+https://github.com/rust-lang/crates.io-index)",
@@ -381,7 +423,7 @@ name = "rand_jitter"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 dependencies = [
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
  "rand_core 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -393,7 +435,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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  "fuchsia-cprng 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)",
- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
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  "rdrand 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -424,6 +466,11 @@ dependencies = [
  "rand_core 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
+[[package]]
+name = "rgb"
+version = "0.8.13"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+
 [[package]]
 name = "rustc_version"
 version = "0.2.3"
@@ -483,7 +530,7 @@ version = "1.0.94"
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 dependencies = [
  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
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+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -525,11 +572,10 @@ dependencies = [
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- "wasmer-runtime 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
+ "wasmer-runtime 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
 ]
 
 [[package]]
@@ -538,7 +584,7 @@ version = "0.15.39"
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  "proc-macro2 0.4.30 (registry+https://github.com/rust-lang/crates.io-index)",
- "quote 0.6.12 (registry+https://github.com/rust-lang/crates.io-index)",
+ "quote 0.6.13 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -593,29 +639,32 @@ dependencies = [
 
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- "wasmer-singlepass-backend 0.5.1 (git+https://github.com/yaronwittenstein/wasmer)",
+ "wasmer-runtime-core 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
+ "wasmer-singlepass-backend 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
 ]
 
 [[package]]
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 dependencies = [
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- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.12.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
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  "smallvec 0.6.10 (registry+https://github.com/rust-lang/crates.io-index)",
- "wasmparser 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasmparser 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)",
  "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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 [[package]]
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-version = "0.5.1"
-source = "git+https://github.com/yaronwittenstein/wasmer#aaf3036f8315a91c8089cac9e5f014a57a00f9f2"
+version = "0.5.5"
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 dependencies = [
  "byteorder 1.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "colored 1.8.0 (registry+https://github.com/rust-lang/crates.io-index)",
  "dynasm 0.3.2 (registry+https://github.com/rust-lang/crates.io-index)",
  "dynasmrt 0.3.1 (registry+https://github.com/rust-lang/crates.io-index)",
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- "libc 0.2.59 (registry+https://github.com/rust-lang/crates.io-index)",
- "nix 0.13.1 (registry+https://github.com/rust-lang/crates.io-index)",
+ "libc 0.2.60 (registry+https://github.com/rust-lang/crates.io-index)",
+ "nix 0.14.1 (registry+https://github.com/rust-lang/crates.io-index)",
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- "wasmparser 0.29.2 (registry+https://github.com/rust-lang/crates.io-index)",
+ "wasmer-runtime-core 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)",
+ "wasmparser 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)",
 ]
 
 [[package]]
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-version = "0.29.2"
+version = "0.32.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
 [[package]]
@@ -679,17 +729,32 @@ name = "winapi-x86_64-pc-windows-gnu"
 version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 
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+ "winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)",
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@@ -733,6 +799,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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@@ -753,12 +820,13 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
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+"checksum wasmer-runtime 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
+"checksum wasmer-runtime-core 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
+"checksum wasmer-singlepass-backend 0.5.5 (git+https://github.com/yaronwittenstein/wasmer?branch=ctx-drop-finalizer)" = "<none>"
+"checksum wasmparser 0.32.1 (registry+https://github.com/rust-lang/crates.io-index)" = "22d1801de30f112ddaf665291097694ee33a36d1cb414b53a921d05b3519674a"
 "checksum winapi 0.2.8 (registry+https://github.com/rust-lang/crates.io-index)" = "167dc9d6949a9b857f3451275e911c3f44255842c1f7a76f33c55103a909087a"
 "checksum winapi 0.3.7 (registry+https://github.com/rust-lang/crates.io-index)" = "f10e386af2b13e47c89e7236a7a14a086791a2b88ebad6df9bf42040195cf770"
 "checksum winapi-build 0.1.1 (registry+https://github.com/rust-lang/crates.io-index)" = "2d315eee3b34aca4797b2da6b13ed88266e6d612562a0c46390af8299fc699bc"
 "checksum winapi-i686-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "ac3b87c63620426dd9b991e5ce0329eff545bccbbb34f3be09ff6fb6ab51b7b6"
 "checksum winapi-x86_64-pc-windows-gnu 0.4.0 (registry+https://github.com/rust-lang/crates.io-index)" = "712e227841d057c1ee1cd2fb22fa7e5a5461ae8e48fa2ca79ec42cfc1931183f"
+"checksum winconsole 0.10.0 (registry+https://github.com/rust-lang/crates.io-index)" = "3ef84b96d10db72dd980056666d7f1e7663ce93d82fa33b63e71c966f4cf5032"
diff --git a/crates/svm-wasmer/Cargo.toml b/crates/svm-wasmer/Cargo.toml
index 73492c910..43c27ebb0 100644
--- a/crates/svm-wasmer/Cargo.toml
+++ b/crates/svm-wasmer/Cargo.toml
@@ -8,8 +8,12 @@ publish = false
 [dependencies]
 svm-common = { path = "../svm-common" }
 svm-storage = { path = "../svm-storage" }
-wasmer-runtime = { git = "https://github.com/yaronwittenstein/wasmer", features = ["singlepass"] }
-memoffset = "0.4.0"
+
+[dependencies.wasmer-runtime]
+default-features = false
+git = "https://github.com/yaronwittenstein/wasmer"
+branch = "ctx-drop-finalizer"
+features = ["singlepass"]
 
 [dev-dependencies]
 wabt = "0.7.4"
diff --git a/crates/svm-wasmer/src/ctx.rs b/crates/svm-wasmer/src/ctx.rs
index 644176f58..d9838bf97 100644
--- a/crates/svm-wasmer/src/ctx.rs
+++ b/crates/svm-wasmer/src/ctx.rs
@@ -30,3 +30,9 @@ impl<'a, 'pc: 'a, PC> SvmCtx<'a, 'pc, PC> {
         Self { regs_64, storage }
     }
 }
+
+impl<'a, 'pc: 'a, PC> Drop for SvmCtx<'a, 'pc, PC> {
+    fn drop(&mut self) {
+        drop(&mut self.storage);
+    }
+}
diff --git a/crates/svm-wasmer/src/macros.rs b/crates/svm-wasmer/src/macros.rs
index 49b0f72c6..3e6f3fb9a 100644
--- a/crates/svm-wasmer/src/macros.rs
+++ b/crates/svm-wasmer/src/macros.rs
@@ -213,6 +213,16 @@ macro_rules! wasmer_ctx_reg {
     }};
 }
 
+/// Extracts from `wasmer` instance context (type: `Ctx`) the register indexed `reg_idx` and calls
+/// on it `set` with input `data`
+#[macro_export]
+macro_rules! wasmer_ctx_reg_write {
+    ($ctx: expr, $reg_idx: expr, $data: expr, $PC: ident) => {{
+        let reg = wasmer_data_reg!($ctx.data, $reg_idx, $PC);
+        reg.set($data);
+    }};
+}
+
 use crate::ctx::SvmCtx;
 use std::ffi::c_void;
 use svm_storage::traits::PageCache;
@@ -357,4 +367,19 @@ mod tests {
         let slice = svm_read_page_slice!(storage, 1, 0, 100, 3);
         assert_eq!(vec![10, 20, 30], slice);
     }
+
+    // #[test]
+    // fn sanity() {
+    //     // let ctx = create_boxed_svm_ctx!(0x12_34_56_78, MemKVStore, MemPages, MemPageCache, 5, 100);
+    //
+    //     let kv = MemKVStore::new();
+    //     let addr = Address::from(0x12_34_56_78 as u32);
+    //     let db = Rc::new(RefCell::new(kv));
+    //
+    //     let mut pages = MemPages::new(addr, db);
+    //     let mut page_cache = MemPageCache::new(&mut pages, 10);
+    //     let mut storage = PageSliceCache::new(&mut page_cache, 100);
+    //
+    //     let ctx = SvmCtx::new(&mut storage);
+    // }
 }
diff --git a/crates/svm-wasmer/src/vmcalls.rs b/crates/svm-wasmer/src/vmcalls.rs
index 04fef435e..c13955b2a 100644
--- a/crates/svm-wasmer/src/vmcalls.rs
+++ b/crates/svm-wasmer/src/vmcalls.rs
@@ -194,12 +194,6 @@ mod tests {
         compile(&wasm)
     }
 
-    fn init_wasmer_instance_reg<PC>(instance: &mut Instance, reg_idx: i32, data: &[u8]) {
-        let ctx = instance.context_mut();
-        let reg = wasmer_ctx_reg!(ctx, reg_idx, PC);
-        reg.set(data);
-    }
-
     const WASM_MEM_TO_REG_COPY: &'static str = r#"
         (module
             ;; import `svm` vmcalls
@@ -292,6 +286,33 @@ mod tests {
               get_local 4 ;; dst_offset
               call $storage_write_from_reg))"#;
 
+    // #[test]
+    // fn wasmer_dtor_frees_svm_ctx_resources() {
+    //     let module = wasmer_compile_module(
+    //         r#"
+    //         (module
+    //             (func (export "add") (param i32 i32) (result i32)
+    //                 get_local 0
+    //                 get_local 1
+    //                 i32.add))
+    //         "#,
+    //     )
+    //     .unwrap();
+    //
+    //     let import_object = imports! {
+    //         lazy_create_svm_import_object!(0x12_34_56_78, MemKVStore, MemPages, MemPageCache, 5, 100),
+    //     };
+    //
+    //     let instance = module.instantiate(&import_object).unwrap();
+    //
+    //     let add: Func<(i32, i32), i32> = instance.func("add").unwrap();
+    //     let res = add.call(10, 20);
+    //
+    //     drop(instance.context());
+    //
+    //     // asserting that `Drop` has been called on instance `SvmCtx`
+    // }
+
     #[test]
     fn vmcalls_mem_to_reg_copy() {
         let module = wasmer_compile_module(WASM_MEM_TO_REG_COPY).unwrap();
@@ -336,7 +357,7 @@ mod tests {
         let mut instance = module.instantiate(&import_object).unwrap();
 
         // initializing reg `2` with values `10, 20, 30` respectively
-        init_wasmer_instance_reg::<MemPageCache>(&mut instance, 2, &[10, 20, 30]);
+        wasmer_ctx_reg_write!(instance.context_mut(), 2, &[10, 20, 30], MemPageCache);
 
         // asserting memory is zeros before copy
         let cells = wasmer_ctx_mem_cells!(instance.context(), 0, 3);