Add a basic JavaScript-to-FuzzIL compiler

The new compiler:
- Is (mostly) written in Swift to ensure that changes to FuzzIL are
  reflected in the compiler.
- Features an "end-to-end" testsuite that runs as part of `swift test`.
  The testsuite consists of a number of JavaScript programs which are
  compiled to FuzzIL, then lifted back to JavaScript and checked to
  produce the same output as the original code.
- Uses a (fairly) stable protobuf-based AST format which is currently
  produced by a node.js-based parser (since there seem to be no good
  JavaScript parsers with swift integration), but could also be produced
  by any other parser.

The compiler is still quite far away from being feature complete but it
should support the most important language features. Adding support for
more features is usually relatively simple: typically it involves adding
one or more tests to the testuite, adding the relevant AST nodes to
ast.proto, updating the parser script to emit these nodes, and updating
the compiler to handle them. However, some features may require changes
to FuzzIL, such as proper handling of loop headers.

The compiler is currently exposed through the FuzzILTool's --compile
option. In the future we may want to have a more sophisticated CLI
interface, for example to allow removing calls to certain functions
(such as assertX from tests) from the compiled code.

.gitignore

@@ -5,6 +5,11 @@ Package.resolved
 /*.xcodeproj
 .vscode
 .*.sw?
+.swiftpm
 
 # custom GCE configuration
 Cloud/GCE/config.sh
+
+# node.js dependencies, used by the JavaScript parser for the FuzzIL compiler
+node_modules
+package-lock.json

Cloud/Docker/Corpus/.gitignore

@@ -0,0 +1,2 @@
+*js
+*fuzzil.protobuf

Cloud/Docker/Dockerfile

@@ -23,6 +23,9 @@ ADD DuktapeBuilder/out duktape
 # Add JerryScript binary
 ADD JerryScriptBuilder/out jerryscript
 
+# Add Corpus (if any)
+ADD Corpus corpus
+
 # Add Fuzzilli binaries
 ADD FuzzilliBuilder/out/Fuzzilli Fuzzilli
 ADD FuzzilliBuilder/out/REPRLRun REPRLRun

Cloud/GCE/config-template.sh

@@ -19,6 +19,8 @@ BINARY=./v8/d8
 FUZZILLI_ARGS="--profile=v8"
 # Arguments for the root instance. See ./Fuzzilli --help
 FUZZILLI_ROOT_ARGS="--exportStatistics"
+# Arguments for the intermediate instances. See ./Fuzzilli --help
+FUZZILLI_INTERMEDIATE_ARGS=""
 # Arguments for the leaf instances. See ./Fuzzilli --help
 FUZZILLI_LEAF_ARGS=""
 

Cloud/GCE/start.sh

@@ -165,7 +165,7 @@ if [ "$START_INTERMEDIATES" = true ]; then
                 --container-tty \
                 --container-command=/bin/bash \
                 --container-arg="-c" \
-                --container-arg="sysctl -w 'kernel.core_pattern=|/bin/false' && ./Fuzzilli --instanceType=intermediate --connectTo=$parent_ip:1337 --bindTo=0.0.0.0:1337 $FUZZILLI_ARGS $BINARY" \
+                --container-arg="sysctl -w 'kernel.core_pattern=|/bin/false' && ./Fuzzilli --instanceType=intermediate --connectTo=$parent_ip:1337 --bindTo=0.0.0.0:1337 $FUZZILLI_ARGS $FUZZILLI_INTERMEDIATE_ARGS $BINARY" \
                 --network-tier=PREMIUM \
                 --maintenance-policy=MIGRATE \
                 --labels=container-vm=$IMAGE,level=$level,role=intermediate,session=$SESSION