108 lines
3.5 KiB
C++
108 lines
3.5 KiB
C++
/*
|
|
* Copyright (c) 2021, Ali Mohammad Pur <mpfard@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <LibWasm/AbstractMachine/Configuration.h>
|
|
#include <LibWasm/AbstractMachine/Interpreter.h>
|
|
|
|
namespace Wasm {
|
|
|
|
Optional<Label> Configuration::nth_label(size_t i)
|
|
{
|
|
for (auto& entry : m_stack.entries()) {
|
|
if (auto ptr = entry.get_pointer<NonnullOwnPtr<Label>>()) {
|
|
if (i == 0)
|
|
return **ptr;
|
|
--i;
|
|
}
|
|
}
|
|
return {};
|
|
}
|
|
|
|
Result Configuration::call(FunctionAddress address, Vector<Value> arguments)
|
|
{
|
|
auto* function = m_store.get(address);
|
|
if (!function)
|
|
return Trap {};
|
|
if (auto* wasm_function = function->get_pointer<WasmFunction>()) {
|
|
Vector<Value> locals;
|
|
locals.ensure_capacity(arguments.size() + wasm_function->code().locals().size());
|
|
for (auto& value : arguments)
|
|
locals.append(Value { value });
|
|
for (auto& type : wasm_function->code().locals())
|
|
locals.empend(type, 0ull);
|
|
|
|
auto frame = make<Frame>(
|
|
wasm_function->module(),
|
|
move(locals),
|
|
wasm_function->code().body(),
|
|
wasm_function->type().results().size());
|
|
|
|
set_frame(move(frame));
|
|
return execute();
|
|
}
|
|
|
|
// It better be a host function, else something is really wrong.
|
|
auto& host_function = function->get<HostFunction>();
|
|
auto result = bit_cast<HostFunctionType>(host_function.ptr())(m_store, arguments);
|
|
auto count = host_function.type().results().size();
|
|
if (count == 0)
|
|
return Result { Vector<Value> {} };
|
|
if (count == 1)
|
|
return Result { Vector<Value> { Value { host_function.type().results().first(), result } } };
|
|
TODO();
|
|
}
|
|
|
|
Result Configuration::execute()
|
|
{
|
|
Interpreter interpreter;
|
|
interpreter.interpret(*this);
|
|
if (interpreter.did_trap())
|
|
return Trap {};
|
|
|
|
Vector<NonnullOwnPtr<Value>> results;
|
|
for (size_t i = 0; i < m_current_frame->arity(); ++i)
|
|
results.append(move(stack().pop().get<NonnullOwnPtr<Value>>()));
|
|
auto label = stack().pop();
|
|
// ASSERT: label == current frame
|
|
if (!label.has<NonnullOwnPtr<Label>>())
|
|
return Trap {};
|
|
Vector<Value> results_moved;
|
|
results_moved.ensure_capacity(results.size());
|
|
for (auto& entry : results)
|
|
results_moved.unchecked_append(move(*entry));
|
|
return Result { move(results_moved) };
|
|
}
|
|
|
|
void Configuration::dump_stack()
|
|
{
|
|
for (const auto& entry : stack().entries()) {
|
|
entry.visit(
|
|
[](const NonnullOwnPtr<Value>& v) {
|
|
v->value().visit([]<typename T>(const T& v) {
|
|
if constexpr (IsIntegral<T> || IsFloatingPoint<T>)
|
|
dbgln(" {}", v);
|
|
else
|
|
dbgln(" *{}", v.value());
|
|
});
|
|
},
|
|
[](const NonnullOwnPtr<Frame>& f) {
|
|
dbgln(" frame({})", f->arity());
|
|
for (auto& local : f->locals()) {
|
|
local.value().visit([]<typename T>(const T& v) {
|
|
if constexpr (IsIntegral<T> || IsFloatingPoint<T>)
|
|
dbgln(" {}", v);
|
|
else
|
|
dbgln(" *{}", v.value());
|
|
});
|
|
}
|
|
},
|
|
[](const NonnullOwnPtr<Label>& l) {
|
|
dbgln(" label({}) -> {}", l->arity(), l->continuation());
|
|
});
|
|
}
|
|
}
|
|
|
|
}
|