/
script.vala
3292 lines (2605 loc) · 101 KB
/
script.vala
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namespace Frida {
private class BareboneScript : Object {
public signal void message (string json, Bytes? data);
public AgentScriptId id {
get;
construct;
}
public Barebone.Services services {
get;
construct;
}
private GDB.Client gdb;
private QuickJS.Runtime rt;
private QuickJS.Context ctx;
private QuickJS.Atom address_key;
private QuickJS.Atom base_key;
private QuickJS.Atom breakpoint_key;
private QuickJS.Atom coalesce_key;
private QuickJS.Atom dependencies_key;
private QuickJS.Atom handle_key;
private QuickJS.Atom invoke_key;
private QuickJS.Atom length_key;
private QuickJS.Atom line_number_key;
private QuickJS.Atom message_key;
private QuickJS.Atom on_complete_key;
private QuickJS.Atom on_enter_key;
private QuickJS.Atom on_error_key;
private QuickJS.Atom on_leave_key;
private QuickJS.Atom on_match_key;
private QuickJS.Atom protection_key;
private QuickJS.Atom prototype_key;
private QuickJS.Atom signum_key;
private QuickJS.Atom size_key;
private QuickJS.Atom thread_key;
private QuickJS.Atom type_key;
private QuickJS.Atom v_key;
private Gee.Queue<QuickJS.Value?> tick_callbacks = new Gee.ArrayQueue<QuickJS.Value?> ();
private Barebone.Allocation? cached_landing_zone; // TODO: Deallocate on teardown.
private Gee.Set<Barebone.Callback> native_callbacks = new Gee.HashSet<Barebone.Callback> ();
private static QuickJS.ClassID cpu_context_class;
private static QuickJS.ClassExoticMethods cpu_context_exotic_methods;
private static QuickJS.ClassID invocation_listener_class;
private Gee.Set<Barebone.InvocationListener> invocation_listeners = new Gee.HashSet<Barebone.InvocationListener> ();
private static QuickJS.ClassID invocation_context_class;
private static QuickJS.ClassID invocation_args_class;
private static QuickJS.ClassExoticMethods invocation_args_exotic_methods;
private static QuickJS.ClassID invocation_retval_class;
private static QuickJS.ClassID rust_module_class;
private Gee.Set<Barebone.RustModule> rust_modules = new Gee.HashSet<Barebone.RustModule> ();
private static QuickJS.ClassID gdb_thread_class;
private static QuickJS.ClassID gdb_breakpoint_class;
private Gee.Map<GDB.Breakpoint, QuickJS.Value?> gdb_breakpoints = new Gee.HashMap<GDB.Breakpoint, QuickJS.Value?> ();
private QuickJS.Value global = QuickJS.Undefined;
private QuickJS.Value runtime_obj = QuickJS.Undefined;
private QuickJS.Value dispatch_exception_func = QuickJS.Undefined;
private QuickJS.Value dispatch_message_func = QuickJS.Undefined;
private QuickJS.Value ptr_func = QuickJS.Undefined;
private QuickJS.Value int64_func = QuickJS.Undefined;
private QuickJS.Value uint64_func = QuickJS.Undefined;
private Gee.ArrayList<QuickJS.Value?> entrypoints = new Gee.ArrayList<QuickJS.Value?> ();
private Gee.Map<string, Asset> assets = new Gee.HashMap<string, Asset> ();
private Cancellable io_cancellable = new Cancellable ();
private const uint64 MAX_ASSET_SIZE = 100 * 1024 * 1024;
private const uint32 MAX_JS_BYTE_ARRAY_LENGTH = 100 * 1024 * 1024;
public static BareboneScript create (AgentScriptId id, string source, Barebone.Services services) throws Error {
var script = new BareboneScript (id, services);
unowned string runtime_js = (string) Frida.Data.Barebone.get_script_runtime_js_blob ().data;
script.add_program (runtime_js, "/_frida.js");
script.add_program (source, "/agent.js");
return script;
}
private BareboneScript (AgentScriptId id, Barebone.Services services) {
Object (id: id, services: services);
}
static construct {
cpu_context_exotic_methods.get_own_property = on_cpu_context_get_own_property;
cpu_context_exotic_methods.get_own_property_names = on_cpu_context_get_own_property_names;
cpu_context_exotic_methods.has_property = on_cpu_context_has_property;
cpu_context_exotic_methods.get_property = on_cpu_context_get_property;
cpu_context_exotic_methods.set_property = on_cpu_context_set_property;
invocation_args_exotic_methods.get_property = on_invocation_args_get_property;
invocation_args_exotic_methods.set_property = on_invocation_args_set_property;
}
construct {
gdb = services.machine.gdb;
rt = QuickJS.Runtime.make ();
rt.set_opaque (this);
ctx = QuickJS.Context.make (rt);
ctx.set_opaque (this);
address_key = ctx.make_atom ("address");
base_key = ctx.make_atom ("base");
breakpoint_key = ctx.make_atom ("breakpoint");
coalesce_key = ctx.make_atom ("coalesce");
dependencies_key = ctx.make_atom ("dependencies");
handle_key = ctx.make_atom ("handle");
invoke_key = ctx.make_atom ("_invoke");
length_key = ctx.make_atom ("length");
line_number_key = ctx.make_atom ("lineNumber");
message_key = ctx.make_atom ("message");
on_complete_key = ctx.make_atom ("onComplete");
on_enter_key = ctx.make_atom ("onEnter");
on_error_key = ctx.make_atom ("onError");
on_leave_key = ctx.make_atom ("onLeave");
on_match_key = ctx.make_atom ("onMatch");
protection_key = ctx.make_atom ("protection");
prototype_key = ctx.make_atom ("prototype");
signum_key = ctx.make_atom ("signum");
size_key = ctx.make_atom ("size");
thread_key = ctx.make_atom ("thread");
type_key = ctx.make_atom ("type");
v_key = ctx.make_atom ("$v");
global = ctx.get_global_object ();
add_cfunc (global, "_send", on_send, 2);
add_cfunc (global, "_invoke", on_invoke, 1);
add_cfunc (global, "_installNativeCallback", on_install_native_callback, 3);
var script_obj = ctx.make_object ();
add_cfunc (script_obj, "evaluate", on_evaluate, 2);
add_cfunc (script_obj, "nextTick", on_next_tick, 1);
global.set_property_str (ctx, "Script", script_obj);
QuickJS.ClassDef cc;
cc.class_name = "CpuContext";
cc.finalizer = on_cpu_context_finalize;
cc.exotic = &cpu_context_exotic_methods;
rt.make_class (QuickJS.make_class_id (ref cpu_context_class), cc);
var memory_obj = ctx.make_object ();
add_cfunc (memory_obj, "alloc", on_memory_alloc, 1);
add_cfunc (memory_obj, "scan", on_memory_scan, 4);
add_cfunc (memory_obj, "scanSync", on_memory_scan_sync, 3);
global.set_property_str (ctx, "Memory", memory_obj);
var process_obj = ctx.make_object ();
process_obj.set_property_str (ctx, "arch", ctx.make_string (gdb.arch.to_nick ()));
process_obj.set_property_str (ctx, "pageSize", ctx.make_uint32 ((uint32) services.allocator.page_size));
process_obj.set_property_str (ctx, "pointerSize", ctx.make_uint32 (gdb.pointer_size));
add_cfunc (process_obj, "enumerateRanges", on_process_enumerate_ranges, 1);
global.set_property_str (ctx, "Process", process_obj);
var file_obj = ctx.make_object ();
add_cfunc (file_obj, "readAllBytes", on_file_read_all_bytes, 1);
add_cfunc (file_obj, "readAllText", on_file_read_all_text, 1);
add_cfunc (file_obj, "writeAllBytes", on_file_write_all_bytes, 2);
add_cfunc (file_obj, "writeAllText", on_file_write_all_text, 2);
global.set_property_str (ctx, "File", file_obj);
var interceptor_obj = ctx.make_object ();
add_property (interceptor_obj, "breakpointKind", on_interceptor_get_breakpoint_kind,
on_interceptor_set_breakpoint_kind);
add_cfunc (interceptor_obj, "attach", on_interceptor_attach, 2);
global.set_property_str (ctx, "Interceptor", interceptor_obj);
QuickJS.ClassDef il;
il.class_name = "InvocationListener";
rt.make_class (QuickJS.make_class_id (ref invocation_listener_class), il);
var il_proto = ctx.make_object ();
add_cfunc (il_proto, "detach", on_invocation_listener_detach, 0);
ctx.set_class_proto (invocation_listener_class, il_proto);
QuickJS.ClassDef ic;
ic.class_name = "InvocationContext";
rt.make_class (QuickJS.make_class_id (ref invocation_context_class), ic);
var ic_proto = ctx.make_object ();
add_getter (ic_proto, "returnAddress", on_invocation_context_get_return_address);
add_getter (ic_proto, "context", on_invocation_context_get_context);
ic_proto.set_property_str (ctx, "errno", ctx.make_int32 (-1));
add_getter (ic_proto, "threadId", on_invocation_context_get_thread_id);
add_getter (ic_proto, "depth", on_invocation_context_get_depth);
ctx.set_class_proto (invocation_context_class, ic_proto);
QuickJS.ClassDef ia;
ia.class_name = "InvocationArguments";
ia.exotic = &invocation_args_exotic_methods;
rt.make_class (QuickJS.make_class_id (ref invocation_args_class), ia);
QuickJS.ClassDef ir;
ir.class_name = "InvocationReturnValue";
rt.make_class (QuickJS.make_class_id (ref invocation_retval_class), ir);
QuickJS.ClassDef rm;
rm.class_name = "RustModule";
rm.finalizer = on_rust_module_finalize;
rt.make_class (QuickJS.make_class_id (ref rust_module_class), rm);
var rm_proto = ctx.make_object ();
add_cfunc (rm_proto, "dispose", on_rust_module_dispose, 0);
ctx.set_class_proto (rust_module_class, rm_proto);
var rm_ctor = ctx.make_cfunction2 (on_rust_module_construct, rm.class_name, 3, constructor, 0);
rm_ctor.set_constructor (ctx, rm_proto);
global.set_property_str (ctx, "RustModule", rm_ctor);
var gdb_obj = ctx.make_object ();
add_getter (gdb_obj, "state", on_gdb_get_state);
add_getter (gdb_obj, "exception", on_gdb_get_exception);
add_cfunc (gdb_obj, "continue", on_gdb_continue, 0);
add_cfunc (gdb_obj, "stop", on_gdb_stop, 0);
add_cfunc (gdb_obj, "restart", on_gdb_restart, 0);
add_cfunc (gdb_obj, "readPointer", on_gdb_read_pointer, 1);
add_cfunc (gdb_obj, "writePointer", on_gdb_write_pointer, 2);
add_cfunc (gdb_obj, "readS8", on_gdb_read_s8, 1);
add_cfunc (gdb_obj, "writeS8", on_gdb_write_s8, 2);
add_cfunc (gdb_obj, "readU8", on_gdb_read_u8, 1);
add_cfunc (gdb_obj, "writeU8", on_gdb_write_u8, 2);
add_cfunc (gdb_obj, "readS16", on_gdb_read_s16, 1);
add_cfunc (gdb_obj, "writeS16", on_gdb_write_s16, 2);
add_cfunc (gdb_obj, "readU16", on_gdb_read_u16, 1);
add_cfunc (gdb_obj, "writeU16", on_gdb_write_u16, 2);
add_cfunc (gdb_obj, "readS32", on_gdb_read_s32, 1);
add_cfunc (gdb_obj, "writeS32", on_gdb_write_s32, 2);
add_cfunc (gdb_obj, "readU32", on_gdb_read_u32, 1);
add_cfunc (gdb_obj, "writeU32", on_gdb_write_u32, 2);
add_cfunc (gdb_obj, "readS64", on_gdb_read_s64, 1);
add_cfunc (gdb_obj, "writeS64", on_gdb_write_s64, 2);
add_cfunc (gdb_obj, "readU64", on_gdb_read_u64, 1);
add_cfunc (gdb_obj, "writeU64", on_gdb_write_u64, 2);
add_cfunc (gdb_obj, "readFloat", on_gdb_read_float, 1);
add_cfunc (gdb_obj, "writeFloat", on_gdb_write_float, 2);
add_cfunc (gdb_obj, "readDouble", on_gdb_read_double, 1);
add_cfunc (gdb_obj, "writeDouble", on_gdb_write_double, 2);
add_cfunc (gdb_obj, "readByteArray", on_gdb_read_byte_array, 2);
add_cfunc (gdb_obj, "writeByteArray", on_gdb_write_byte_array, 2);
add_cfunc (gdb_obj, "readCString", on_gdb_read_c_string, 2);
add_cfunc (gdb_obj, "readUtf8String", on_gdb_read_utf8_string, 2);
add_cfunc (gdb_obj, "writeUtf8String", on_gdb_write_utf8_string, 2);
add_cfunc (gdb_obj, "addBreakpoint", on_gdb_add_breakpoint, 3);
add_cfunc (gdb_obj, "runRemoteCommand", on_gdb_run_remote_command, 1);
add_cfunc (gdb_obj, "execute", on_gdb_execute, 1);
add_cfunc (gdb_obj, "query", on_gdb_query, 1);
global.set_property_str (ctx, "$gdb", gdb_obj);
QuickJS.ClassDef th;
th.class_name = "GDBThread";
th.finalizer = on_gdb_thread_finalize;
rt.make_class (QuickJS.make_class_id (ref gdb_thread_class), th);
var th_proto = ctx.make_object ();
add_getter (th_proto, "id", on_gdb_thread_get_id);
add_getter (th_proto, "name", on_gdb_thread_get_name);
add_cfunc (th_proto, "step", on_gdb_thread_step, 0);
add_cfunc (th_proto, "stepAndContinue", on_gdb_thread_step_and_continue, 0);
add_cfunc (th_proto, "readRegisters", on_gdb_thread_read_registers, 0);
add_cfunc (th_proto, "readRegister", on_gdb_thread_read_register, 1);
add_cfunc (th_proto, "writeRegister", on_gdb_thread_write_register, 2);
ctx.set_class_proto (gdb_thread_class, th_proto);
QuickJS.ClassDef bp;
bp.class_name = "GDBBreakpoint";
bp.finalizer = on_gdb_breakpoint_finalize;
rt.make_class (QuickJS.make_class_id (ref gdb_breakpoint_class), bp);
var bp_proto = ctx.make_object ();
add_getter (bp_proto, "kind", on_gdb_breakpoint_get_kind);
add_getter (bp_proto, "address", on_gdb_breakpoint_get_address);
add_getter (bp_proto, "size", on_gdb_breakpoint_get_size);
add_cfunc (bp_proto, "enable", on_gdb_breakpoint_enable, 0);
add_cfunc (bp_proto, "disable", on_gdb_breakpoint_disable, 0);
add_cfunc (bp_proto, "remove", on_gdb_breakpoint_remove, 0);
ctx.set_class_proto (gdb_breakpoint_class, bp_proto);
}
private void add_cfunc (QuickJS.Value ns, string name, QuickJS.CFunction func, int arity) {
ns.set_property_str (ctx, name, ctx.make_cfunction (func, name, arity));
}
private void add_getter (QuickJS.Value ns, string name, QuickJS.CFunction func) {
add_property (ns, name, func, null);
}
private void add_property (QuickJS.Value ns, string name, QuickJS.CFunction getter_func, QuickJS.CFunction? setter_func) {
QuickJS.Atom prop = ctx.make_atom (name);
var val = QuickJS.Undefined;
QuickJS.PropertyFlags flags = HAS_GET | HAS_ENUMERABLE | ENUMERABLE;
var getter = ctx.make_cfunction (getter_func, name, 0);
QuickJS.Value setter = QuickJS.Undefined;
if (setter_func != null) {
flags |= HAS_SET;
setter = ctx.make_cfunction (setter_func, name, 1);
}
ns.define_property (ctx, prop, val, getter, setter, flags);
ctx.free_value (setter);
ctx.free_value (getter);
ctx.free_atom (prop);
}
~BareboneScript () {
rust_modules.clear ();
native_callbacks.clear ();
QuickJS.Value[] values = {
global,
runtime_obj,
dispatch_exception_func,
dispatch_message_func,
ptr_func,
int64_func,
uint64_func,
};
foreach (var val in values)
ctx.free_value (val);
QuickJS.Atom atoms[] = {
address_key,
base_key,
breakpoint_key,
coalesce_key,
dependencies_key,
handle_key,
invoke_key,
length_key,
line_number_key,
message_key,
on_complete_key,
on_enter_key,
on_error_key,
on_leave_key,
on_match_key,
protection_key,
signum_key,
size_key,
thread_key,
type_key,
v_key,
};
foreach (var atom in atoms)
ctx.free_atom (atom);
ctx = null;
rt = null;
}
public async void destroy (Cancellable? cancellable) throws IOError {
io_cancellable.cancel ();
var interceptor = services.interceptor;
foreach (var listener in invocation_listeners.to_array ()) {
try {
yield interceptor.detach (listener, cancellable);
} catch (Error e) {
}
}
invocation_listeners.clear ();
var source = new IdleSource ();
source.set_callback (destroy.callback);
source.attach (MainContext.get_thread_default ());
yield;
}
public void load () {
foreach (QuickJS.Value? entrypoint in entrypoints) {
var result = ctx.eval_function (entrypoint);
if (result.is_exception ())
catch_and_emit ();
ctx.free_value (result);
if (runtime_obj.is_undefined ()) {
runtime_obj = global.get_property_str (ctx, "$rt");
if (!runtime_obj.is_undefined ()) {
dispatch_exception_func = runtime_obj.get_property_str (ctx, "dispatchException");
assert (!dispatch_exception_func.is_undefined ());
dispatch_message_func = runtime_obj.get_property_str (ctx, "dispatchMessage");
assert (!dispatch_message_func.is_undefined ());
var native_pointer_instance = global.get_property_str (ctx, "NULL");
assert (!native_pointer_instance.is_undefined ());
var native_pointer_proto = native_pointer_instance.get_prototype (ctx);
var ir_proto = ctx.make_object_proto (native_pointer_proto);
add_cfunc (ir_proto, "replace", on_invocation_retval_replace, 1);
ctx.set_class_proto (invocation_retval_class, ir_proto);
ctx.free_value (native_pointer_proto);
ctx.free_value (native_pointer_instance);
ptr_func = global.get_property_str (ctx, "ptr");
assert (!ptr_func.is_undefined ());
int64_func = global.get_property_str (ctx, "int64");
assert (!int64_func.is_undefined ());
uint64_func = global.get_property_str (ctx, "uint64");
assert (!uint64_func.is_undefined ());
}
}
}
perform_pending_io ();
}
public void post (string json, Bytes? data) {
var json_val = ctx.make_string (json);
invoke_void (dispatch_message_func, { json_val }, runtime_obj);
ctx.free_value (json_val);
perform_pending_io ();
}
private void add_program (string source, string name) throws Error {
unowned string package_marker = "📦\n";
unowned string delimiter_marker = "\n✄\n";
unowned string alias_marker = "↻ ";
if (source.has_prefix (package_marker)) {
rt.set_module_loader_func (normalize_module_name, load_module);
string pending = source[package_marker.length:];
while (true) {
string[] pkg_tokens = pending.split (delimiter_marker, 2);
if (pkg_tokens.length != 2)
throw_malformed_package ();
unowned string header = pkg_tokens[0];
unowned string raw_assets = pkg_tokens[1];
uint assets_offset = 0;
uint assets_size = raw_assets.length;
Asset? entrypoint = null;
string[] header_lines = header.split ("\n");
Asset? current_asset = null;
for (uint i = 0; i != header_lines.length && assets_offset != assets_size; i++) {
unowned string header_line = header_lines[i];
if (header_line.has_prefix (alias_marker)) {
if (current_asset == null)
throw_malformed_package ();
string alias = header_line[alias_marker.length:];
assets[alias] = current_asset;
continue;
}
unowned string assets_cursor = (string *) raw_assets + assets_offset;
if (i != 0) {
if (!assets_cursor.has_prefix (delimiter_marker))
throw_malformed_package ();
assets_offset += delimiter_marker.length;
}
string[] tokens = header_line.split (" ", 2);
if (tokens.length != 2)
throw_malformed_package ();
uint64 size = uint64.parse (tokens[0]);
if (size == 0 || size > MAX_ASSET_SIZE || size > assets_size - assets_offset)
throw_malformed_package ();
unowned string asset_name = tokens[1];
string asset_data = raw_assets[assets_offset:assets_offset + (uint) size];
var asset = new Asset (asset_name, (owned) asset_data);
assets[asset_name] = asset;
current_asset = asset;
if (entrypoint == null && asset_name.has_suffix (".js"))
entrypoint = asset;
assets_offset += (uint) size;
}
if (entrypoint == null)
throw_malformed_package ();
var val = compile_module (entrypoint);
entrypoints.add (val);
string rest = raw_assets[assets_offset:];
if (rest.has_prefix (delimiter_marker))
pending = rest[delimiter_marker.length:];
else if (rest.length == 0)
break;
else
throw_malformed_package ();
}
} else {
var val = compile_script (source, name);
entrypoints.add (val);
}
}
[NoReturn]
private static void throw_malformed_package () throws Error {
throw new Error.INVALID_ARGUMENT ("Malformed package");
}
private string * normalize_module_name (QuickJS.Context ctx, string base_name, string name) {
if (name[0] != '.') {
Asset? asset = assets[name];
if (asset != null)
return ctx.strdup (asset.name);
return ctx.strdup (name);
}
var result = new StringBuilder ();
int offset = base_name.last_index_of_char ('/');
if (offset != -1)
result.append (base_name[:offset]);
string * cursor = name;
while (true) {
if (cursor->has_prefix ("./")) {
cursor += 2;
} else if (cursor->has_prefix ("../")) {
if (result.len == 0)
break;
int last_slash_offset = result.str.last_index_of_char ('/');
string * rest;
if (last_slash_offset != -1)
rest = (string *) result.str + last_slash_offset + 1;
else
rest = result.str;
if (rest == "." || rest == "..")
break;
result.truncate ((last_slash_offset != -1) ? last_slash_offset : 0);
cursor += 3;
} else {
break;
}
}
result
.append_c ('/')
.append (cursor);
return ctx.strdup (result.str);
}
private unowned QuickJS.ModuleDef? load_module (QuickJS.Context ctx, string module_name) {
QuickJS.Value val;
try {
Asset? asset = assets[module_name];
if (asset == null)
throw new Error.INVALID_ARGUMENT ("Could not load module '%s'", module_name);
val = compile_module (asset);
} catch (Error e) {
throw_js_error (error_message_to_js (e.message));
return null;
}
unowned QuickJS.ModuleDef mod = (QuickJS.ModuleDef) val.get_ptr ();
ctx.free_value (val);
return mod;
}
private QuickJS.Value compile_module (Asset asset) throws Error {
var val = ctx.eval (asset.data, asset.data.length, asset.name,
QuickJS.EvalType.MODULE |
QuickJS.EvalFlag.STRICT |
QuickJS.EvalFlag.COMPILE_ONLY);
if (val.is_exception ()) {
JSError e = catch_js_error ();
throw new Error.INVALID_ARGUMENT ("Could not parse '%s' line %u: %s", asset.name, e.line, e.message);
}
return val;
}
private QuickJS.Value compile_script (string source, string name) throws Error {
var val = ctx.eval (source, source.length, name,
QuickJS.EvalType.GLOBAL |
QuickJS.EvalFlag.STRICT |
QuickJS.EvalFlag.COMPILE_ONLY);
if (val.is_exception ()) {
JSError e = catch_js_error ();
throw new Error.INVALID_ARGUMENT ("Script(line %u): %s", e.line, e.message);
}
return val;
}
private static QuickJS.Value on_send (QuickJS.Context ctx, QuickJS.Value this_val, QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
string message;
if (!script->unparse_string (argv[0], out message))
return QuickJS.Exception;
Bytes? data = null;
if (!argv[1].is_undefined () && !argv[1].is_null () && !script->unparse_bytes (argv[1], out data))
return QuickJS.Exception;
script->message (message, data);
return QuickJS.Undefined;
}
private static QuickJS.Value on_invoke (QuickJS.Context ctx, QuickJS.Value this_val, QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
uint64 impl;
if (!script->unparse_uint64 (argv[0], out impl))
return QuickJS.Exception;
uint64[] args = {};
for (uint i = 1; i != argv.length; i++) {
uint64 v;
if (!script->unparse_uint64 (argv[i], out v))
return QuickJS.Exception;
args += v;
}
var promise = new Promise<uint64?> ();
script->do_invoke.begin (impl, args, promise);
uint64? retval = script->process_events_until_ready (promise);
if (retval == null)
return QuickJS.Exception;
return ctx.make_biguint64 (retval);
}
private async void do_invoke (uint64 impl, uint64[] args, Promise<uint64?> promise) {
try {
if (cached_landing_zone == null)
cached_landing_zone = yield services.allocator.allocate (4, 1, io_cancellable);
uint64 retval = yield services.machine.invoke (impl, args, cached_landing_zone.virtual_address,
io_cancellable);
promise.resolve (retval);
} catch (GLib.Error e) {
promise.reject (e);
}
}
private static QuickJS.Value on_install_native_callback (QuickJS.Context ctx, QuickJS.Value this_val,
QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
uint64 code;
if (!script->unparse_uint64 (argv[0], out code))
return QuickJS.Exception;
QuickJS.Value wrapper, method;
var scope = new ValueScope (script);
wrapper = scope.retain (argv[1]);
if (!scope.unparse_callback (wrapper, script->invoke_key, out method))
return QuickJS.Exception;
uint arity;
if (!script->unparse_uint (argv[2], out arity))
return QuickJS.Exception;
var handler = new NativeCallbackHandler (script, wrapper, method, arity, scope);
var promise = new Promise<Barebone.Callback> ();
script->do_install_native_callback.begin (code, handler, promise);
Barebone.Callback? callback = script->process_events_until_ready (promise);
if (callback == null)
return QuickJS.Exception;
script->native_callbacks.add (callback);
return QuickJS.Undefined;
}
private async void do_install_native_callback (uint64 code, Barebone.CallbackHandler handler,
Promise<Barebone.Callback> promise) {
try {
var callback = yield new Barebone.Callback (code, handler, services.machine, io_cancellable);
promise.resolve (callback);
} catch (GLib.Error e) {
promise.reject (e);
}
}
private class NativeCallbackHandler : Object, Barebone.CallbackHandler {
public uint arity {
get { return _arity; }
}
private weak BareboneScript script;
private QuickJS.Value wrapper;
private QuickJS.Value method;
private uint _arity;
private ValueScope scope;
public NativeCallbackHandler (BareboneScript script, QuickJS.Value wrapper, QuickJS.Value method, uint arity,
ValueScope scope) {
this.script = script;
this.wrapper = wrapper;
this.method = method;
this._arity = arity;
this.scope = scope;
}
public async uint64 handle_invocation (uint64[] args, Barebone.CallFrame frame, Cancellable? cancellable)
throws Error, IOError {
var scope = new ValueScope (script);
unowned QuickJS.Context ctx = scope.ctx;
var js_args = scope.take (ctx.make_array ());
for (uint32 i = 0; i != args.length; i++)
js_args.set_property_uint32 (ctx, i, ctx.make_biguint64 (args[i]));
var return_address = scope.take (script.make_native_pointer (frame.return_address));
var context = scope.take (script.make_cpu_context (frame.registers));
var js_retval = script.invoke (method, { js_args, return_address, context }, wrapper);
if (js_retval.is_exception ())
return 0;
scope.take (js_retval);
uint64 retval;
if (!script.unparse_uint64 (js_retval, out retval)) {
script.catch_and_emit ();
return 0;
}
return retval;
}
}
private static QuickJS.Value on_evaluate (QuickJS.Context ctx, QuickJS.Value this_val, QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
string name;
if (!script->unparse_string (argv[0], out name))
return QuickJS.Exception;
string source;
if (!script->unparse_string (argv[1], out source))
return QuickJS.Exception;
var func = ctx.eval (source, source.length, name,
QuickJS.EvalType.GLOBAL |
QuickJS.EvalFlag.STRICT |
QuickJS.EvalFlag.COMPILE_ONLY);
if (func.is_exception ()) {
JSError e = script->catch_js_error ();
script->throw_js_error ("could not parse '%s' line %u: %s".printf (name, e.line, e.message));
return QuickJS.Exception;
}
return ctx.eval_function (func);
}
private static QuickJS.Value on_next_tick (QuickJS.Context ctx, QuickJS.Value this_val, QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
var callback = argv[0];
if (!callback.is_function (ctx)) {
script->throw_js_error ("expected a function");
return QuickJS.Exception;
}
script->tick_callbacks.offer (ctx.dup_value (callback));
return QuickJS.Undefined;
}
private QuickJS.Value make_native_pointer (uint64 val) {
var jsval = ctx.make_biguint64 (val);
var result = ptr_func.call (ctx, QuickJS.Undefined, { jsval });
ctx.free_value (jsval);
return result;
}
private QuickJS.Value make_int64 (int64 val) {
var jsval = ctx.make_bigint64 (val);
var result = int64_func.call (ctx, QuickJS.Undefined, { jsval });
ctx.free_value (jsval);
return result;
}
private QuickJS.Value make_uint64 (uint64 val) {
var jsval = ctx.make_biguint64 (val);
var result = uint64_func.call (ctx, QuickJS.Undefined, { jsval });
ctx.free_value (jsval);
return result;
}
private QuickJS.Value make_array_buffer_take (owned uint8[] contents) {
return ctx.make_array_buffer_with_free_func ((owned) contents, free_array_buffer, false);
}
private static void free_array_buffer (QuickJS.Runtime rt, void * ptr) {
free (ptr);
}
private QuickJS.Value make_cpu_context (Gee.Map<string, Variant> regs) {
var wrapper = ctx.make_object_class (cpu_context_class);
wrapper.set_opaque (regs.ref ());
return wrapper;
}
private static void on_cpu_context_finalize (QuickJS.Runtime rt, QuickJS.Value val) {
Gee.Map<string, Variant> * map = val.get_opaque (cpu_context_class);
map->unref ();
}
private static int on_cpu_context_get_own_property (QuickJS.Context ctx, QuickJS.PropertyDescriptor desc, QuickJS.Value obj,
QuickJS.Atom prop) {
BareboneScript * script = ctx.get_opaque ();
var val = script->read_cpu_context_field (obj, prop);
if (val.is_undefined ())
return 0;
desc.flags = ENUMERABLE;
desc.value = val;
desc.getter = QuickJS.Undefined;
desc.setter = QuickJS.Undefined;
return 1;
}
private static int on_cpu_context_get_own_property_names (QuickJS.Context ctx, out QuickJS.PropertyEnum * tab,
out uint32 len, QuickJS.Value obj) {
Gee.Map<string, Variant> * map = obj.get_opaque (cpu_context_class);
var keys = map->keys;
int n = keys.size;
tab = ctx.malloc (n * sizeof (QuickJS.PropertyEnum));
len = n;
int i = 0;
foreach (var key in keys) {
QuickJS.PropertyEnum * p = tab + i;
p->is_enumerable = true;
p->atom = ctx.make_atom (key);
i++;
}
return 0;
}
private static int on_cpu_context_has_property (QuickJS.Context ctx, QuickJS.Value obj, QuickJS.Atom atom) {
Gee.Map<string, Variant> * map = obj.get_opaque (cpu_context_class);
string * name = atom.to_cstring (ctx);
int result = map->has_key (name) ? 1 : 0;
ctx.free_cstring (name);
return result;
}
private static QuickJS.Value on_cpu_context_get_property (QuickJS.Context ctx, QuickJS.Value obj, QuickJS.Atom atom,
QuickJS.Value receiver) {
BareboneScript * script = ctx.get_opaque ();
return script->read_cpu_context_field (obj, atom);
}
private static int on_cpu_context_set_property (QuickJS.Context ctx, QuickJS.Value obj, QuickJS.Atom atom,
QuickJS.Value val, QuickJS.Value receiver, QuickJS.PropertyFlags flags) {
BareboneScript * script = ctx.get_opaque ();
return script->write_cpu_context_field (obj, atom, val) ? 0 : -1;
}
private QuickJS.Value read_cpu_context_field (QuickJS.Value obj, QuickJS.Atom atom) {
Gee.Map<string, Variant> * map = obj.get_opaque (cpu_context_class);
QuickJS.Value result = QuickJS.Undefined;
string * name = atom.to_cstring (ctx);
Variant? val = map->get (name);
if (val != null) {
if (val.is_of_type (VariantType.UINT64)) {
result = make_native_pointer (val.get_uint64 ());
} else if (val.is_of_type (VariantType.UINT32)) {
result = ctx.make_uint32 (val.get_uint32 ());
} else {
unowned uint8[] data = (uint8[]) val.get_data ();
result = ctx.make_array_buffer (data[:val.get_size ()]);
}
}
ctx.free_cstring (name);
return result;
}
private bool write_cpu_context_field (QuickJS.Value obj, QuickJS.Atom atom, QuickJS.Value val) {
Gee.Map<string, Variant> * map = obj.get_opaque (cpu_context_class);
string * name = atom.to_cstring (ctx);
try {
Variant? existing_val = map->get (name);
if (existing_val == null) {
throw_js_error ("invalid register name");
return false;
}
Variant new_val;
if (existing_val.is_of_type (VariantType.UINT64)) {
uint64 raw_val;
if (!unparse_uint64 (val, out raw_val))
return false;
new_val = raw_val;
} else if (existing_val.is_of_type (VariantType.UINT32)) {
uint32 raw_val;
if (!unparse_uint32 (val, out raw_val))
return false;
new_val = raw_val;
} else {
Bytes raw_val;
if (!unparse_bytes (val, out raw_val))
return false;
new_val = Variant.new_from_data (new VariantType ("ay"), raw_val.get_data (), true,
(owned) raw_val);
}
map->set (name, new_val);
map->set_data ("dirty", true);
} finally {
ctx.free_cstring (name);
}
return true;
}
private static QuickJS.Value on_memory_alloc (QuickJS.Context ctx, QuickJS.Value this_val, QuickJS.Value[] argv) {
BareboneScript * script = ctx.get_opaque ();
uint size;
if (!script->unparse_uint (argv[0], out size))
return QuickJS.Exception;
if (size == 0 || size > 0x7fffffff) {
script->throw_js_error ("invalid size");
return QuickJS.Exception;
}
var promise = new Promise<Barebone.Allocation> ();
script->do_memory_alloc.begin (size, promise);
Barebone.Allocation? allocation = script->process_events_until_ready (promise);
if (allocation == null)
return QuickJS.Exception;
// TODO: Monitor lifetime and deallocate().
return script->make_native_pointer (allocation.virtual_address);
}
private async void do_memory_alloc (size_t size, Promise<Barebone.Allocation> promise) {
try {
var allocator = services.allocator;
size_t page_size = allocator.page_size;
size_t alignment = (size % page_size) == 0 ? page_size : 16;
var allocation = yield allocator.allocate (size, alignment, io_cancellable);
Bytes zeroes = gdb.make_buffer_builder ()
.skip (size)
.build ();
yield gdb.write_byte_array (allocation.virtual_address, zeroes, io_cancellable);
promise.resolve (allocation);
} catch (GLib.Error e) {
promise.reject (e);
}
}