Edit and instrument already compiled Wasm binaries
Moved to https://github.com/xtuc/wasm-coredump.
cargo install wasm-edit
Change the initial memory amount (in pages):
wasm-edit edit-memory --initial-memory=1000 < input.wasm > output.wasm
memory.grow
Trace calls to the memory.grow
instruction:
wasm-edit instrument-memory < input.wasm > output.wasm
Requires Wasi, but doesn't require any change on the host. Tested with Rust and theoretically working with C/C++ (clang).
Some Wasm binaries have very recursive flow of control, increase the maximum stack size:
$ ulimit -s 160000