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LibWasm: Start implementing a naive bytecode interpreter

As the parser now flattens out the instructions and inserts synthetic
nesting/structured instructions where needed, we can treat the whole
thing as a simple parsed bytecode stream.
This currently knows how to execute the following instructions:
- unreachable
- nop
- local.get
- local.set
- {i,f}{32,64}.const
- block
- loop
- if/else
- branch / branch_if
- i32_add
- i32_and/or/xor
- i32_ne

This also extends the 'wasm' utility to optionally execute the first
function in the module with optionally user-supplied arguments.
This commit is contained in:
Ali Mohammad Pur 2021-05-01 03:19:01 +04:30 committed by Andreas Kling
parent faa34a0a8b
commit 056be42c0b
10 changed files with 513 additions and 30 deletions

View file

@ -74,4 +74,33 @@ Result Configuration::execute()
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());
});
}
}
}