Prints no longer work on wasip2 with main

[alexcrichton]

Updating this repository in wasi-sdk is failing due to failing tests. I've done some debugging and I think the reason is that prints no longer work. For example:

#include <stdio.h>
int main() {
  printf("hi\n");
}

currently does nothing on main:

$ make WASI_SNAPSHOT=p2 
$ clang --sysroot=./sysroot/ -target wasm32-wasip2 foo.c -o foo.wasm -resource-dir=$($WASI_SDK_PATH/bin/clang -print-resource-dir)
$ wasmtime foo.wasm

(prints nothing)

Bisection points to #606 (cc @catamorphism and @pchickey). It looks like this line is failing (but unhandled) and then reading (what I think is undefined memory?) leads to this case hence the no output.

I didn't end up debugging too much further but my suspicion was that insertion of stdout is failing due to the table not being initialized yet or something like that, but I might also be missing some startup or something that initializes it.

[catamorphism]

I'll take a look.