mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-11-10 13:00:29 +03:00
531 lines
20 KiB
C++
531 lines
20 KiB
C++
/*
|
|
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibCore/ArgsParser.h>
|
|
#include <LibCore/File.h>
|
|
#include <LibCore/FileStream.h>
|
|
#include <LibLine/Editor.h>
|
|
#include <LibWasm/AbstractMachine/AbstractMachine.h>
|
|
#include <LibWasm/AbstractMachine/BytecodeInterpreter.h>
|
|
#include <LibWasm/Printer/Printer.h>
|
|
#include <LibWasm/Types.h>
|
|
#include <signal.h>
|
|
#include <unistd.h>
|
|
|
|
RefPtr<Line::Editor> g_line_editor;
|
|
static auto g_stdout = Core::OutputFileStream::standard_error();
|
|
static Wasm::Printer g_printer { g_stdout };
|
|
static bool g_continue { false };
|
|
static void (*old_signal)(int);
|
|
static Wasm::DebuggerBytecodeInterpreter g_interpreter;
|
|
|
|
static void sigint_handler(int)
|
|
{
|
|
if (!g_continue) {
|
|
signal(SIGINT, old_signal);
|
|
kill(getpid(), SIGINT);
|
|
}
|
|
g_continue = false;
|
|
}
|
|
|
|
static bool post_interpret_hook(Wasm::Configuration&, Wasm::InstructionPointer& ip, Wasm::Instruction const& instr, Wasm::Interpreter const& interpreter)
|
|
{
|
|
if (interpreter.did_trap()) {
|
|
g_continue = false;
|
|
warnln("Trapped when executing ip={}", ip);
|
|
g_printer.print(instr);
|
|
warnln("Trap reason: {}", interpreter.trap_reason());
|
|
const_cast<Wasm::Interpreter&>(interpreter).clear_trap();
|
|
}
|
|
return true;
|
|
}
|
|
|
|
static bool pre_interpret_hook(Wasm::Configuration& config, Wasm::InstructionPointer& ip, Wasm::Instruction const& instr)
|
|
{
|
|
static bool always_print_stack = false;
|
|
static bool always_print_instruction = false;
|
|
if (always_print_stack)
|
|
config.dump_stack();
|
|
if (always_print_instruction) {
|
|
g_stdout.write(String::formatted("{:0>4} ", ip.value()).bytes());
|
|
g_printer.print(instr);
|
|
}
|
|
if (g_continue)
|
|
return true;
|
|
g_stdout.write(String::formatted("{:0>4} ", ip.value()).bytes());
|
|
g_printer.print(instr);
|
|
String last_command = "";
|
|
for (;;) {
|
|
auto result = g_line_editor->get_line("> ");
|
|
if (result.is_error()) {
|
|
return false;
|
|
}
|
|
auto str = result.release_value();
|
|
g_line_editor->add_to_history(str);
|
|
if (str.is_empty())
|
|
str = last_command;
|
|
else
|
|
last_command = str;
|
|
auto args = str.split_view(' ');
|
|
if (args.is_empty())
|
|
continue;
|
|
auto& cmd = args[0];
|
|
if (cmd.is_one_of("h", "help")) {
|
|
warnln("Wasm shell commands");
|
|
warnln("Toplevel:");
|
|
warnln("- [s]tep Run one instruction");
|
|
warnln("- next Alias for step");
|
|
warnln("- [c]ontinue Execute until a trap or the program exit point");
|
|
warnln("- [p]rint <args...> Print various things (see section on print)");
|
|
warnln("- call <fn> <args...> Call the function <fn> with the given arguments");
|
|
warnln("- set <args...> Set shell option (see section on settings)");
|
|
warnln("- unset <args...> Unset shell option (see section on settings)");
|
|
warnln("- [h]elp Print this help");
|
|
warnln();
|
|
warnln("Print:");
|
|
warnln("- print [s]tack Print the contents of the stack, including frames and labels");
|
|
warnln("- print [[m]em]ory <index> Print the contents of the memory identified by <index>");
|
|
warnln("- print [[i]nstr]uction Print the current instruction");
|
|
warnln("- print [[f]unc]tion <index> Print the function identified by <index>");
|
|
warnln();
|
|
warnln("Settings:");
|
|
warnln("- set print stack Make the shell print the stack on every instruction executed");
|
|
warnln("- set print [instr]uction Make the shell print the instruction that will be executed next");
|
|
warnln();
|
|
continue;
|
|
}
|
|
if (cmd.is_one_of("s", "step", "next")) {
|
|
return true;
|
|
}
|
|
if (cmd.is_one_of("p", "print")) {
|
|
if (args.size() < 2) {
|
|
warnln("Print what?");
|
|
continue;
|
|
}
|
|
auto& what = args[1];
|
|
if (what.is_one_of("s", "stack")) {
|
|
config.dump_stack();
|
|
continue;
|
|
}
|
|
if (what.is_one_of("m", "mem", "memory")) {
|
|
if (args.size() < 3) {
|
|
warnln("print what memory?");
|
|
continue;
|
|
}
|
|
auto value = args[2].to_uint<u64>();
|
|
if (!value.has_value()) {
|
|
warnln("invalid memory index {}", args[2]);
|
|
continue;
|
|
}
|
|
auto mem = config.store().get(Wasm::MemoryAddress(value.value()));
|
|
if (!mem) {
|
|
warnln("invalid memory index {} (not found)", args[2]);
|
|
continue;
|
|
}
|
|
warnln("{:>32hex-dump}", mem->data().bytes());
|
|
continue;
|
|
}
|
|
if (what.is_one_of("i", "instr", "instruction")) {
|
|
g_printer.print(instr);
|
|
continue;
|
|
}
|
|
if (what.is_one_of("f", "func", "function")) {
|
|
if (args.size() < 3) {
|
|
warnln("print what function?");
|
|
continue;
|
|
}
|
|
auto value = args[2].to_uint<u64>();
|
|
if (!value.has_value()) {
|
|
warnln("invalid function index {}", args[2]);
|
|
continue;
|
|
}
|
|
auto fn = config.store().get(Wasm::FunctionAddress(value.value()));
|
|
if (!fn) {
|
|
warnln("invalid function index {} (not found)", args[2]);
|
|
continue;
|
|
}
|
|
if (auto* fn_value = fn->get_pointer<Wasm::HostFunction>()) {
|
|
warnln("Host function at {:p}", &fn_value->function());
|
|
continue;
|
|
}
|
|
if (auto* fn_value = fn->get_pointer<Wasm::WasmFunction>()) {
|
|
g_printer.print(fn_value->code());
|
|
continue;
|
|
}
|
|
}
|
|
}
|
|
if (cmd == "call"sv) {
|
|
if (args.size() < 2) {
|
|
warnln("call what?");
|
|
continue;
|
|
}
|
|
Optional<Wasm::FunctionAddress> address;
|
|
auto index = args[1].to_uint<u64>();
|
|
if (index.has_value()) {
|
|
address = config.frame().module().functions()[index.value()];
|
|
} else {
|
|
auto& name = args[1];
|
|
for (auto& export_ : config.frame().module().exports()) {
|
|
if (export_.name() == name) {
|
|
if (auto addr = export_.value().get_pointer<Wasm::FunctionAddress>()) {
|
|
address = *addr;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!address.has_value()) {
|
|
failed_to_find:;
|
|
warnln("Could not find a function {}", args[1]);
|
|
continue;
|
|
}
|
|
|
|
auto fn = config.store().get(*address);
|
|
if (!fn)
|
|
goto failed_to_find;
|
|
|
|
auto type = fn->visit([&](auto& value) { return value.type(); });
|
|
if (type.parameters().size() + 2 != args.size()) {
|
|
warnln("Expected {} arguments for call, but found only {}", type.parameters().size(), args.size() - 2);
|
|
continue;
|
|
}
|
|
Vector<u64> values_to_push;
|
|
Vector<Wasm::Value> values;
|
|
for (size_t index = 2; index < args.size(); ++index)
|
|
values_to_push.append(args[index].to_uint().value_or(0));
|
|
for (auto& param : type.parameters())
|
|
values.append(Wasm::Value { param, values_to_push.take_last() });
|
|
|
|
Wasm::Result result { Wasm::Trap {} };
|
|
{
|
|
Wasm::BytecodeInterpreter::CallFrameHandle handle { g_interpreter, config };
|
|
result = config.call(g_interpreter, *address, move(values));
|
|
}
|
|
if (result.is_trap())
|
|
warnln("Execution trapped: {}", result.trap().reason);
|
|
if (!result.values().is_empty())
|
|
warnln("Returned:");
|
|
for (auto& value : result.values()) {
|
|
g_stdout.write(" -> "sv.bytes());
|
|
g_printer.print(value);
|
|
}
|
|
continue;
|
|
}
|
|
if (cmd.is_one_of("set", "unset")) {
|
|
auto value = !cmd.starts_with('u');
|
|
if (args.size() < 3) {
|
|
warnln("(un)set what (to what)?");
|
|
continue;
|
|
}
|
|
if (args[1] == "print"sv) {
|
|
if (args[2] == "stack"sv)
|
|
always_print_stack = value;
|
|
else if (args[2].is_one_of("instr", "instruction"))
|
|
always_print_instruction = value;
|
|
else
|
|
warnln("Unknown print category '{}'", args[2]);
|
|
continue;
|
|
}
|
|
warnln("Unknown set category '{}'", args[1]);
|
|
continue;
|
|
}
|
|
if (cmd.is_one_of("c", "continue")) {
|
|
g_continue = true;
|
|
return true;
|
|
}
|
|
warnln("Command not understood: {}", cmd);
|
|
}
|
|
}
|
|
|
|
static Optional<Wasm::Module> parse(StringView const& filename)
|
|
{
|
|
auto result = Core::File::open(filename, Core::OpenMode::ReadOnly);
|
|
if (result.is_error()) {
|
|
warnln("Failed to open {}: {}", filename, result.error());
|
|
return {};
|
|
}
|
|
|
|
auto stream = Core::InputFileStream(result.release_value());
|
|
auto parse_result = Wasm::Module::parse(stream);
|
|
if (parse_result.is_error()) {
|
|
warnln("Something went wrong, either the file is invalid, or there's a bug with LibWasm!");
|
|
warnln("The parse error was {}", Wasm::parse_error_to_string(parse_result.error()));
|
|
return {};
|
|
}
|
|
return parse_result.release_value();
|
|
}
|
|
|
|
static void print_link_error(Wasm::LinkError const& error)
|
|
{
|
|
for (auto const& missing : error.missing_imports)
|
|
warnln("Missing import '{}'", missing);
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
char const* filename = nullptr;
|
|
bool print = false;
|
|
bool attempt_instantiate = false;
|
|
bool debug = false;
|
|
bool export_all_imports = false;
|
|
bool shell_mode = false;
|
|
String exported_function_to_execute;
|
|
Vector<u64> values_to_push;
|
|
Vector<String> modules_to_link_in;
|
|
|
|
Core::ArgsParser parser;
|
|
parser.add_positional_argument(filename, "File name to parse", "file");
|
|
parser.add_option(debug, "Open a debugger", "debug", 'd');
|
|
parser.add_option(print, "Print the parsed module", "print", 'p');
|
|
parser.add_option(attempt_instantiate, "Attempt to instantiate the module", "instantiate", 'i');
|
|
parser.add_option(exported_function_to_execute, "Attempt to execute the named exported function from the module (implies -i)", "execute", 'e', "name");
|
|
parser.add_option(export_all_imports, "Export noop functions corresponding to imports", "export-noop", 0);
|
|
parser.add_option(shell_mode, "Launch a REPL in the module's context (implies -i)", "shell", 's');
|
|
parser.add_option(Core::ArgsParser::Option {
|
|
.requires_argument = true,
|
|
.help_string = "Extra modules to link with, use to resolve imports",
|
|
.long_name = "link",
|
|
.short_name = 'l',
|
|
.value_name = "file",
|
|
.accept_value = [&](char const* str) {
|
|
if (auto v = StringView { str }; !v.is_empty()) {
|
|
modules_to_link_in.append(v);
|
|
return true;
|
|
}
|
|
return false;
|
|
},
|
|
});
|
|
parser.add_option(Core::ArgsParser::Option {
|
|
.requires_argument = true,
|
|
.help_string = "Supply arguments to the function (default=0) (expects u64, casts to required type)",
|
|
.long_name = "arg",
|
|
.short_name = 0,
|
|
.value_name = "u64",
|
|
.accept_value = [&](char const* str) -> bool {
|
|
if (auto v = StringView { str }.to_uint<u64>(); v.has_value()) {
|
|
values_to_push.append(v.value());
|
|
return true;
|
|
}
|
|
return false;
|
|
},
|
|
});
|
|
parser.parse(argc, argv);
|
|
|
|
if (shell_mode) {
|
|
debug = true;
|
|
attempt_instantiate = true;
|
|
}
|
|
|
|
if (!shell_mode && debug && exported_function_to_execute.is_empty()) {
|
|
warnln("Debug what? (pass -e fn)");
|
|
return 1;
|
|
}
|
|
|
|
if (debug || shell_mode) {
|
|
old_signal = signal(SIGINT, sigint_handler);
|
|
}
|
|
|
|
if (!exported_function_to_execute.is_empty())
|
|
attempt_instantiate = true;
|
|
|
|
auto parse_result = parse(filename);
|
|
if (!parse_result.has_value())
|
|
return 1;
|
|
|
|
if (print && !attempt_instantiate) {
|
|
auto out_stream = Core::OutputFileStream::standard_output();
|
|
Wasm::Printer printer(out_stream);
|
|
printer.print(parse_result.value());
|
|
}
|
|
|
|
if (attempt_instantiate) {
|
|
Wasm::AbstractMachine machine;
|
|
Core::EventLoop main_loop;
|
|
if (debug) {
|
|
g_line_editor = Line::Editor::construct();
|
|
g_interpreter.pre_interpret_hook = pre_interpret_hook;
|
|
g_interpreter.post_interpret_hook = post_interpret_hook;
|
|
}
|
|
|
|
// First, resolve the linked modules
|
|
NonnullOwnPtrVector<Wasm::ModuleInstance> linked_instances;
|
|
Vector<Wasm::Module> linked_modules;
|
|
for (auto& name : modules_to_link_in) {
|
|
auto parse_result = parse(name);
|
|
if (!parse_result.has_value()) {
|
|
warnln("Failed to parse linked module '{}'", name);
|
|
return 1;
|
|
}
|
|
linked_modules.append(parse_result.release_value());
|
|
Wasm::Linker linker { linked_modules.last() };
|
|
for (auto& instance : linked_instances)
|
|
linker.link(instance);
|
|
auto link_result = linker.finish();
|
|
if (link_result.is_error()) {
|
|
warnln("Linking imported module '{}' failed", name);
|
|
print_link_error(link_result.error());
|
|
return 1;
|
|
}
|
|
auto instantiation_result = machine.instantiate(linked_modules.last(), link_result.release_value());
|
|
if (instantiation_result.is_error()) {
|
|
warnln("Instantiation of imported module '{}' failed: {}", name, instantiation_result.error().error);
|
|
return 1;
|
|
}
|
|
linked_instances.append(instantiation_result.release_value());
|
|
}
|
|
|
|
Wasm::Linker linker { parse_result.value() };
|
|
for (auto& instance : linked_instances)
|
|
linker.link(instance);
|
|
|
|
if (export_all_imports) {
|
|
HashMap<Wasm::Linker::Name, Wasm::ExternValue> exports;
|
|
for (auto& entry : linker.unresolved_imports()) {
|
|
if (!entry.type.has<Wasm::TypeIndex>())
|
|
continue;
|
|
auto type = parse_result.value().type(entry.type.get<Wasm::TypeIndex>());
|
|
auto address = machine.store().allocate(Wasm::HostFunction(
|
|
[name = entry.name, type = type](auto&, auto& arguments) -> Wasm::Result {
|
|
StringBuilder argument_builder;
|
|
bool first = true;
|
|
for (auto& argument : arguments) {
|
|
DuplexMemoryStream stream;
|
|
Wasm::Printer { stream }.print(argument);
|
|
if (first)
|
|
first = false;
|
|
else
|
|
argument_builder.append(", "sv);
|
|
argument_builder.append(StringView(stream.copy_into_contiguous_buffer()).trim_whitespace());
|
|
}
|
|
dbgln("[wasm runtime] Stub function {} was called with the following arguments: {}", name, argument_builder.to_string());
|
|
Vector<Wasm::Value> result;
|
|
result.ensure_capacity(type.results().size());
|
|
for (auto& result_type : type.results())
|
|
result.append(Wasm::Value { result_type, 0ull });
|
|
return Wasm::Result { move(result) };
|
|
},
|
|
type));
|
|
exports.set(entry, *address);
|
|
}
|
|
|
|
linker.link(exports);
|
|
}
|
|
|
|
auto link_result = linker.finish();
|
|
if (link_result.is_error()) {
|
|
warnln("Linking main module failed");
|
|
print_link_error(link_result.error());
|
|
return 1;
|
|
}
|
|
auto result = machine.instantiate(parse_result.value(), link_result.release_value());
|
|
if (result.is_error()) {
|
|
warnln("Module instantiation failed: {}", result.error().error);
|
|
return 1;
|
|
}
|
|
auto module_instance = result.release_value();
|
|
|
|
auto launch_repl = [&] {
|
|
Wasm::Configuration config { machine.store() };
|
|
Wasm::Expression expression { {} };
|
|
config.set_frame(Wasm::Frame {
|
|
*module_instance,
|
|
Vector<Wasm::Value> {},
|
|
expression,
|
|
0,
|
|
});
|
|
Wasm::Instruction instr { Wasm::Instructions::nop };
|
|
Wasm::InstructionPointer ip { 0 };
|
|
g_continue = false;
|
|
pre_interpret_hook(config, ip, instr);
|
|
};
|
|
|
|
auto stream = Core::OutputFileStream::standard_output();
|
|
auto print_func = [&](auto const& address) {
|
|
Wasm::FunctionInstance* fn = machine.store().get(address);
|
|
stream.write(String::formatted("- Function with address {}, ptr = {}\n", address.value(), fn).bytes());
|
|
if (fn) {
|
|
stream.write(String::formatted(" wasm function? {}\n", fn->has<Wasm::WasmFunction>()).bytes());
|
|
fn->visit(
|
|
[&](Wasm::WasmFunction const& func) {
|
|
Wasm::Printer printer { stream, 3 };
|
|
stream.write(" type:\n"sv.bytes());
|
|
printer.print(func.type());
|
|
stream.write(" code:\n"sv.bytes());
|
|
printer.print(func.code());
|
|
},
|
|
[](Wasm::HostFunction const&) {});
|
|
}
|
|
};
|
|
if (print) {
|
|
// Now, let's dump the functions!
|
|
for (auto& address : module_instance->functions()) {
|
|
print_func(address);
|
|
}
|
|
}
|
|
|
|
if (shell_mode) {
|
|
launch_repl();
|
|
return 0;
|
|
}
|
|
|
|
if (!exported_function_to_execute.is_empty()) {
|
|
Optional<Wasm::FunctionAddress> run_address;
|
|
Vector<Wasm::Value> values;
|
|
for (auto& entry : module_instance->exports()) {
|
|
if (entry.name() == exported_function_to_execute) {
|
|
if (auto addr = entry.value().get_pointer<Wasm::FunctionAddress>())
|
|
run_address = *addr;
|
|
}
|
|
}
|
|
if (!run_address.has_value()) {
|
|
warnln("No such exported function, sorry :(");
|
|
return 1;
|
|
}
|
|
|
|
auto instance = machine.store().get(*run_address);
|
|
VERIFY(instance);
|
|
|
|
if (instance->has<Wasm::HostFunction>()) {
|
|
warnln("Exported function is a host function, cannot run that yet");
|
|
return 1;
|
|
}
|
|
|
|
for (auto& param : instance->get<Wasm::WasmFunction>().type().parameters()) {
|
|
if (values_to_push.is_empty())
|
|
values.append(Wasm::Value { param, 0ull });
|
|
else
|
|
values.append(Wasm::Value { param, values_to_push.take_last() });
|
|
}
|
|
|
|
if (print) {
|
|
outln("Executing ");
|
|
print_func(*run_address);
|
|
outln();
|
|
}
|
|
|
|
auto result = machine.invoke(g_interpreter, run_address.value(), move(values));
|
|
|
|
if (debug)
|
|
launch_repl();
|
|
|
|
if (result.is_trap()) {
|
|
warnln("Execution trapped: {}", result.trap().reason);
|
|
} else {
|
|
if (!result.values().is_empty())
|
|
warnln("Returned:");
|
|
for (auto& value : result.values()) {
|
|
Wasm::Printer printer { stream };
|
|
g_stdout.write(" -> "sv.bytes());
|
|
g_printer.print(value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|