mirror of
https://github.com/LadybirdBrowser/ladybird.git
synced 2024-09-11 13:36:13 +03:00
820 lines
32 KiB
C++
820 lines
32 KiB
C++
/*
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* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
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* Copyright (c) 2022, the SerenityOS developers.
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <AK/GenericLexer.h>
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#include <AK/Hex.h>
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#include <AK/MemoryStream.h>
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#include <AK/StackInfo.h>
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#include <LibCore/ArgsParser.h>
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#include <LibCore/File.h>
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#include <LibCore/MappedFile.h>
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#include <LibFileSystem/FileSystem.h>
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#include <LibLine/Editor.h>
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#include <LibMain/Main.h>
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#include <LibWasm/AbstractMachine/AbstractMachine.h>
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#include <LibWasm/AbstractMachine/BytecodeInterpreter.h>
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#include <LibWasm/Printer/Printer.h>
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#include <LibWasm/Types.h>
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#include <LibWasm/Wasi.h>
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#include <signal.h>
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#include <unistd.h>
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RefPtr<Line::Editor> g_line_editor;
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static OwnPtr<Stream> g_stdout {};
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static OwnPtr<Wasm::Printer> g_printer {};
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static bool g_continue { false };
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static void (*old_signal)(int);
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static StackInfo g_stack_info;
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static Wasm::DebuggerBytecodeInterpreter g_interpreter(g_stack_info);
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static void sigint_handler(int)
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{
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if (!g_continue) {
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signal(SIGINT, old_signal);
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kill(getpid(), SIGINT);
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}
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g_continue = false;
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}
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static Optional<u128> convert_to_uint(StringView string)
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{
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if (string.is_empty())
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return {};
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u128 value = 0;
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auto const characters = string.characters_without_null_termination();
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for (size_t i = 0; i < string.length(); i++) {
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if (characters[i] < '0' || characters[i] > '9')
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return {};
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value *= 10;
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value += u128 { static_cast<u64>(characters[i] - '0'), 0 };
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}
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return value;
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}
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static Optional<u128> convert_to_uint_from_hex(StringView string)
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{
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if (string.is_empty())
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return {};
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u128 value = 0;
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auto const count = string.length();
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auto const upper_bound = NumericLimits<u128>::max();
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for (size_t i = 0; i < count; i++) {
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char digit = string[i];
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if (value > (upper_bound >> 4))
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return {};
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auto digit_val = decode_hex_digit(digit);
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if (digit_val == 255)
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return {};
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value = (value << 4) + digit_val;
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}
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return value;
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}
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static ErrorOr<Wasm::Value> parse_value(StringView spec)
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{
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constexpr auto is_sep = [](char c) { return is_ascii_space(c) || c == ':'; };
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// Scalar: 'T.const[:\s]v' (i32.const 42)
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auto parse_scalar = []<typename T>(StringView text) -> ErrorOr<Wasm::Value> {
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if constexpr (IsFloatingPoint<T>) {
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if (text.trim_whitespace().equals_ignoring_ascii_case("nan"sv)) {
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if constexpr (IsSame<T, float>)
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return Wasm::Value { nanf("") };
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else
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return Wasm::Value { nan("") };
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}
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if (text.trim_whitespace().equals_ignoring_ascii_case("inf"sv)) {
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if constexpr (IsSame<T, float>)
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return Wasm::Value { HUGE_VALF };
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else
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return Wasm::Value { HUGE_VAL };
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}
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}
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if (auto v = text.to_number<T>(); v.has_value())
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return Wasm::Value { *v };
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return Error::from_string_literal("Invalid scalar value");
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};
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// Vector: 'v128.const[:\s]v' (v128.const 0x01000000020000000300000004000000) or 'v(T.const[:\s]v, ...)' (v(i32.const 1, i32.const 2, i32.const 3, i32.const 4))
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auto parse_u128 = [](StringView text) -> ErrorOr<Wasm::Value> {
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u128 value;
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if (text.starts_with("0x"sv)) {
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if (auto v = convert_to_uint_from_hex(text); v.has_value())
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value = *v;
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else
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return Error::from_string_literal("Invalid hex v128 value");
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} else {
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if (auto v = convert_to_uint(text); v.has_value())
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value = *v;
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else
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return Error::from_string_literal("Invalid v128 value");
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}
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return Wasm::Value { value };
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};
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GenericLexer lexer(spec);
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if (lexer.consume_specific("v128.const"sv)) {
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lexer.ignore_while(is_sep);
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// The rest of the string is the value
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auto text = lexer.consume_all();
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return parse_u128(text);
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}
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if (lexer.consume_specific("i8.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<i8>(text);
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}
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if (lexer.consume_specific("i16.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<i16>(text);
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}
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if (lexer.consume_specific("i32.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<i32>(text);
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}
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if (lexer.consume_specific("i64.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<i64>(text);
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}
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if (lexer.consume_specific("f32.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<float>(text);
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}
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if (lexer.consume_specific("f64.const"sv)) {
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lexer.ignore_while(is_sep);
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auto text = lexer.consume_all();
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return parse_scalar.operator()<double>(text);
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}
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if (lexer.consume_specific("v("sv)) {
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Vector<Wasm::Value> values;
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for (;;) {
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lexer.ignore_while(is_sep);
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if (lexer.consume_specific(")"sv))
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break;
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if (lexer.is_eof()) {
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warnln("Expected ')' to close vector");
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break;
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}
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auto value = parse_value(lexer.consume_until(is_any_of(",)"sv)));
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if (value.is_error())
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return value.release_error();
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lexer.consume_specific(',');
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values.append(value.release_value());
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}
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if (values.is_empty())
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return Error::from_string_literal("Empty vector");
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auto element_type = values.first().type();
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for (auto& value : values) {
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if (value.type() != element_type)
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return Error::from_string_literal("Mixed types in vector");
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}
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unsigned total_size = 0;
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unsigned width = 0;
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u128 result = 0;
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u128 last_value = 0;
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for (auto& value : values) {
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if (total_size >= 128)
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return Error::from_string_literal("Vector too large");
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width = value.value().visit(
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[&](Integral auto x) {
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last_value = u128(x, 0);
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return sizeof(x);
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},
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[&](float x) {
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last_value = u128(bit_cast<u32>(x), 0);
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return sizeof(x);
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},
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[&](double x) {
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last_value = u128(bit_cast<u64>(x), 0);
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return sizeof(x);
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},
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[&](auto) -> size_t { VERIFY_NOT_REACHED(); });
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result |= last_value << total_size;
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total_size += width * 8;
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}
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if (total_size < 128)
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warnln("Vector value '{}' is only {} bytes wide, repeating last element", spec, total_size);
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while (total_size < 128) {
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// Repeat the last value until we fill the 128 bits
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result |= last_value << total_size;
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total_size += width * 8;
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}
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return Wasm::Value { result };
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}
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return Error::from_string_literal("Invalid value");
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}
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static bool post_interpret_hook(Wasm::Configuration&, Wasm::InstructionPointer& ip, Wasm::Instruction const& instr, Wasm::Interpreter const& interpreter)
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{
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if (interpreter.did_trap()) {
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g_continue = false;
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warnln("Trapped when executing ip={}", ip);
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g_printer->print(instr);
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warnln("Trap reason: {}", interpreter.trap_reason());
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const_cast<Wasm::Interpreter&>(interpreter).clear_trap();
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}
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return true;
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}
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static bool pre_interpret_hook(Wasm::Configuration& config, Wasm::InstructionPointer& ip, Wasm::Instruction const& instr)
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{
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static bool always_print_stack = false;
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static bool always_print_instruction = false;
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if (always_print_stack)
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config.dump_stack();
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if (always_print_instruction) {
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g_stdout->write_until_depleted(ByteString::formatted("{:0>4} ", ip.value())).release_value_but_fixme_should_propagate_errors();
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g_printer->print(instr);
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}
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if (g_continue)
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return true;
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g_stdout->write_until_depleted(ByteString::formatted("{:0>4} ", ip.value())).release_value_but_fixme_should_propagate_errors();
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g_printer->print(instr);
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ByteString last_command = "";
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for (;;) {
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auto result = g_line_editor->get_line("> ");
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if (result.is_error()) {
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return false;
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}
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auto str = result.release_value();
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g_line_editor->add_to_history(str);
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if (str.is_empty())
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str = last_command;
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else
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last_command = str;
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auto args = str.split_view(' ');
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if (args.is_empty())
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continue;
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auto& cmd = args[0];
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if (cmd.is_one_of("h", "help")) {
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warnln("Wasm shell commands");
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warnln("Toplevel:");
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warnln("- [s]tep Run one instruction");
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warnln("- next Alias for step");
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warnln("- [c]ontinue Execute until a trap or the program exit point");
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warnln("- [p]rint <args...> Print various things (see section on print)");
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warnln("- call <fn> <args...> Call the function <fn> with the given arguments");
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warnln("- set <args...> Set shell option (see section on settings)");
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warnln("- unset <args...> Unset shell option (see section on settings)");
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warnln("- [h]elp Print this help");
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warnln();
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warnln("Print:");
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warnln("- print [s]tack Print the contents of the stack, including frames and labels");
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warnln("- print [[m]em]ory <index> Print the contents of the memory identified by <index>");
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warnln("- print [[i]nstr]uction Print the current instruction");
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warnln("- print [[f]unc]tion <index> Print the function identified by <index>");
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warnln();
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warnln("Settings:");
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warnln("- set print stack Make the shell print the stack on every instruction executed");
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warnln("- set print [instr]uction Make the shell print the instruction that will be executed next");
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warnln();
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continue;
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}
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if (cmd.is_one_of("s", "step", "next")) {
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return true;
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}
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if (cmd.is_one_of("p", "print")) {
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if (args.size() < 2) {
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warnln("Print what?");
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continue;
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}
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auto& what = args[1];
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if (what.is_one_of("s", "stack")) {
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config.dump_stack();
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continue;
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}
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if (what.is_one_of("m", "mem", "memory")) {
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if (args.size() < 3) {
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warnln("print what memory?");
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continue;
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}
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auto value = args[2].to_number<u64>();
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if (!value.has_value()) {
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warnln("invalid memory index {}", args[2]);
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continue;
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}
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auto mem = config.store().get(Wasm::MemoryAddress(value.value()));
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if (!mem) {
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warnln("invalid memory index {} (not found)", args[2]);
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continue;
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}
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warnln("{:>32hex-dump}", mem->data().bytes());
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continue;
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}
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if (what.is_one_of("i", "instr", "instruction")) {
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g_printer->print(instr);
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continue;
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}
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if (what.is_one_of("f", "func", "function")) {
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if (args.size() < 3) {
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warnln("print what function?");
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continue;
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}
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auto value = args[2].to_number<u64>();
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if (!value.has_value()) {
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warnln("invalid function index {}", args[2]);
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continue;
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}
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auto fn = config.store().get(Wasm::FunctionAddress(value.value()));
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if (!fn) {
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warnln("invalid function index {} (not found)", args[2]);
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continue;
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}
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if (auto* fn_value = fn->get_pointer<Wasm::HostFunction>()) {
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warnln("Host function at {:p}", &fn_value->function());
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continue;
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}
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if (auto* fn_value = fn->get_pointer<Wasm::WasmFunction>()) {
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g_printer->print(fn_value->code());
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continue;
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}
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}
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}
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if (cmd == "call"sv) {
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if (args.size() < 2) {
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warnln("call what?");
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continue;
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}
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Optional<Wasm::FunctionAddress> address;
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auto index = args[1].to_number<u64>();
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if (index.has_value()) {
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address = config.frame().module().functions()[index.value()];
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} else {
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auto& name = args[1];
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for (auto& export_ : config.frame().module().exports()) {
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if (export_.name() == name) {
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if (auto addr = export_.value().get_pointer<Wasm::FunctionAddress>()) {
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address = *addr;
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break;
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}
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}
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}
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}
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if (!address.has_value()) {
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failed_to_find:;
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warnln("Could not find a function {}", args[1]);
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continue;
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}
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auto fn = config.store().get(*address);
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if (!fn)
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goto failed_to_find;
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auto type = fn->visit([&](auto& value) { return value.type(); });
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if (type.parameters().size() + 2 != args.size()) {
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warnln("Expected {} arguments for call, but found only {}", type.parameters().size(), args.size() - 2);
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continue;
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}
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Vector<Wasm::Value> values_to_push;
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Vector<Wasm::Value> values;
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auto ok = true;
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for (size_t index = 2; index < args.size(); ++index) {
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auto r = parse_value(args[index]);
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if (r.is_error()) {
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warnln("Failed to parse argument {}: {}", args[index], r.error());
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ok = false;
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break;
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}
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values_to_push.append(r.release_value());
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}
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if (!ok)
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continue;
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for (auto& param : type.parameters()) {
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auto v = values_to_push.take_last();
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if (v.type() != param) {
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warnln("Type mismatch in argument: expected {}, but got {}", Wasm::ValueType::kind_name(param.kind()), Wasm::ValueType::kind_name(v.type().kind()));
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ok = false;
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break;
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}
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values.append(v);
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}
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if (!ok)
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continue;
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Wasm::Result result { Wasm::Trap {} };
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{
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Wasm::BytecodeInterpreter::CallFrameHandle handle { g_interpreter, config };
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result = config.call(g_interpreter, *address, move(values)).assert_wasm_result();
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}
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if (result.is_trap()) {
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warnln("Execution trapped: {}", result.trap().reason);
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} else {
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if (!result.values().is_empty())
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warnln("Returned:");
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for (auto& value : result.values()) {
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g_stdout->write_until_depleted(" -> "sv.bytes()).release_value_but_fixme_should_propagate_errors();
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g_printer->print(value);
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}
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}
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continue;
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}
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if (cmd.is_one_of("set", "unset")) {
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auto value = !cmd.starts_with('u');
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if (args.size() < 3) {
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warnln("(un)set what (to what)?");
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continue;
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}
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if (args[1] == "print"sv) {
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if (args[2] == "stack"sv)
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always_print_stack = value;
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else if (args[2].is_one_of("instr", "instruction"))
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always_print_instruction = value;
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else
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warnln("Unknown print category '{}'", args[2]);
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continue;
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}
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warnln("Unknown set category '{}'", args[1]);
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continue;
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}
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if (cmd.is_one_of("c", "continue")) {
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g_continue = true;
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return true;
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}
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warnln("Command not understood: {}", cmd);
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}
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}
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static Optional<Wasm::Module> parse(StringView filename)
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{
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auto result = Core::MappedFile::map(filename);
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if (result.is_error()) {
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warnln("Failed to open {}: {}", filename, result.error());
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return {};
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}
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auto parse_result = Wasm::Module::parse(*result.value());
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if (parse_result.is_error()) {
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warnln("Something went wrong, either the file is invalid, or there's a bug with LibWasm!");
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warnln("The parse error was {}", Wasm::parse_error_to_byte_string(parse_result.error()));
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return {};
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}
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return parse_result.release_value();
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}
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static void print_link_error(Wasm::LinkError const& error)
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{
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for (auto const& missing : error.missing_imports)
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warnln("Missing import '{}'", missing);
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}
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ErrorOr<int> serenity_main(Main::Arguments arguments)
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{
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StringView filename;
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bool print = false;
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bool attempt_instantiate = false;
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bool debug = false;
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bool export_all_imports = false;
|
|
bool shell_mode = false;
|
|
bool wasi = false;
|
|
ByteString exported_function_to_execute;
|
|
Vector<Wasm::Value> values_to_push;
|
|
Vector<ByteString> modules_to_link_in;
|
|
Vector<StringView> args_if_wasi;
|
|
Vector<StringView> wasi_preopened_mappings;
|
|
|
|
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");
|
|
parser.add_option(shell_mode, "Launch a REPL in the module's context (implies -i)", "shell", 's');
|
|
parser.add_option(wasi, "Enable WASI", "wasi", 'w');
|
|
parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Directory mappings to expose via WASI",
|
|
.long_name = "wasi-map-dir",
|
|
.short_name = 0,
|
|
.value_name = "path[:path]",
|
|
.accept_value = [&](StringView str) {
|
|
if (!str.is_empty()) {
|
|
wasi_preopened_mappings.append(str);
|
|
return true;
|
|
}
|
|
return false;
|
|
},
|
|
});
|
|
parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Extra modules to link with, use to resolve imports",
|
|
.long_name = "link",
|
|
.short_name = 'l',
|
|
.value_name = "file",
|
|
.accept_value = [&](StringView str) {
|
|
if (!str.is_empty()) {
|
|
modules_to_link_in.append(str);
|
|
return true;
|
|
}
|
|
return false;
|
|
},
|
|
});
|
|
parser.add_option(Core::ArgsParser::Option {
|
|
.argument_mode = Core::ArgsParser::OptionArgumentMode::Required,
|
|
.help_string = "Supply arguments to the function (default=0) (T.const:v or v(T.const:v, ...))",
|
|
.long_name = "arg",
|
|
.short_name = 0,
|
|
.value_name = "value",
|
|
.accept_value = [&](StringView str) -> bool {
|
|
auto result = parse_value(str);
|
|
if (result.is_error()) {
|
|
warnln("Failed to parse value: {}", result.error());
|
|
return false;
|
|
}
|
|
values_to_push.append(result.release_value());
|
|
return true;
|
|
},
|
|
});
|
|
parser.add_positional_argument(args_if_wasi, "Arguments to pass to the WASI module", "args", Core::ArgsParser::Required::No);
|
|
parser.parse(arguments);
|
|
|
|
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;
|
|
|
|
g_stdout = TRY(Core::File::standard_output());
|
|
g_printer = TRY(try_make<Wasm::Printer>(*g_stdout));
|
|
|
|
if (print && !attempt_instantiate) {
|
|
Wasm::Printer printer(*g_stdout);
|
|
printer.print(parse_result.value());
|
|
}
|
|
|
|
if (attempt_instantiate) {
|
|
Wasm::AbstractMachine machine;
|
|
Optional<Wasm::Wasi::Implementation> wasi_impl;
|
|
|
|
if (wasi) {
|
|
wasi_impl.emplace(Wasm::Wasi::Implementation::Details {
|
|
.provide_arguments = [&] {
|
|
Vector<String> strings;
|
|
for (auto& string : args_if_wasi)
|
|
strings.append(String::from_utf8(string).release_value_but_fixme_should_propagate_errors());
|
|
return strings; },
|
|
.provide_environment = {},
|
|
.provide_preopened_directories = [&] {
|
|
Vector<Wasm::Wasi::Implementation::MappedPath> paths;
|
|
for (auto& string : wasi_preopened_mappings) {
|
|
auto split_index = string.find(':');
|
|
if (split_index.has_value()) {
|
|
LexicalPath host_path { FileSystem::real_path(string.substring_view(0, *split_index)).release_value_but_fixme_should_propagate_errors() };
|
|
LexicalPath mapped_path { string.substring_view(*split_index + 1) };
|
|
paths.append({move(host_path), move(mapped_path)});
|
|
} else {
|
|
LexicalPath host_path { FileSystem::real_path(string).release_value_but_fixme_should_propagate_errors() };
|
|
LexicalPath mapped_path { string };
|
|
paths.append({move(host_path), move(mapped_path)});
|
|
}
|
|
}
|
|
return paths; },
|
|
});
|
|
}
|
|
|
|
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
|
|
Vector<NonnullOwnPtr<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 (wasi) {
|
|
HashMap<Wasm::Linker::Name, Wasm::ExternValue> wasi_exports;
|
|
for (auto& entry : linker.unresolved_imports()) {
|
|
if (entry.module != "wasi_snapshot_preview1"sv)
|
|
continue;
|
|
auto function = wasi_impl->function_by_name(entry.name);
|
|
if (function.is_error()) {
|
|
dbgln("wasi function {} not implemented :(", entry.name);
|
|
continue;
|
|
}
|
|
auto address = machine.store().allocate(function.release_value());
|
|
wasi_exports.set(entry, *address);
|
|
}
|
|
|
|
linker.link(wasi_exports);
|
|
}
|
|
|
|
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) {
|
|
AllocatingMemoryStream stream;
|
|
Wasm::Printer { stream }.print(argument);
|
|
if (first)
|
|
first = false;
|
|
else
|
|
argument_builder.append(", "sv);
|
|
auto buffer = ByteBuffer::create_uninitialized(stream.used_buffer_size()).release_value_but_fixme_should_propagate_errors();
|
|
stream.read_until_filled(buffer).release_value_but_fixme_should_propagate_errors();
|
|
argument_builder.append(StringView(buffer).trim_whitespace());
|
|
}
|
|
dbgln("[wasm runtime] Stub function {} was called with the following arguments: {}", name, argument_builder.to_byte_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 print_func = [&](auto const& address) {
|
|
Wasm::FunctionInstance* fn = machine.store().get(address);
|
|
g_stdout->write_until_depleted(ByteString::formatted("- Function with address {}, ptr = {}\n", address.value(), fn)).release_value_but_fixme_should_propagate_errors();
|
|
if (fn) {
|
|
g_stdout->write_until_depleted(ByteString::formatted(" wasm function? {}\n", fn->has<Wasm::WasmFunction>())).release_value_but_fixme_should_propagate_errors();
|
|
fn->visit(
|
|
[&](Wasm::WasmFunction const& func) {
|
|
Wasm::Printer printer { *g_stdout, 3 };
|
|
g_stdout->write_until_depleted(" type:\n"sv).release_value_but_fixme_should_propagate_errors();
|
|
printer.print(func.type());
|
|
g_stdout->write_until_depleted(" code:\n"sv).release_value_but_fixme_should_propagate_errors();
|
|
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 if (param == values_to_push.last().type()) {
|
|
values.append(values_to_push.take_last());
|
|
} else {
|
|
warnln("Type mismatch in argument: expected {}, but got {}", Wasm::ValueType::kind_name(param.kind()), Wasm::ValueType::kind_name(values_to_push.last().type().kind()));
|
|
return 1;
|
|
}
|
|
}
|
|
|
|
if (print) {
|
|
outln("Executing ");
|
|
print_func(*run_address);
|
|
outln();
|
|
}
|
|
|
|
auto result = machine.invoke(g_interpreter, run_address.value(), move(values)).assert_wasm_result();
|
|
|
|
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()) {
|
|
g_stdout->write_until_depleted(" -> "sv.bytes()).release_value_but_fixme_should_propagate_errors();
|
|
g_printer->print(value);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|