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wasmi
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Stack hash.

This commit is contained in:
Sergey Pepyakin 2018-03-25 13:28:01 +03:00
parent 959503b49d
commit 52ed4bb589
1 changed files with 21 additions and 7 deletions
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28
hfuzz/src/main.rs
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@ -8,7 +8,12 @@ use std::fs::File;
use std::io::Write;
use std::process::{Command, Stdio};
fn run_spec(data: &[u8]) -> Result<(), ()> {
fn dump_all_into_buf(src: &[u8], buf: &mut [u8; 64]) {
let common_len = usize::min(src.len(), buf.len());
buf[0..common_len].copy_from_slice(&src[0..common_len]);
}
fn run_spec(data: &[u8], stdout_msg_buf: &mut [u8; 64], stderr_msg_buf: &mut [u8; 64]) -> Result<(), ()> {
let temp_dir = tempdir::TempDir::new("spec").unwrap();
let mut seed_path = temp_dir.path().to_path_buf();
seed_path.push("test.wasm");
@ -24,17 +29,19 @@ fn run_spec(data: &[u8]) -> Result<(), ()> {
);
}
let exit_status = Command::new("wasm")
let output = Command::new("wasm")
.arg("-d")
.arg(&seed_path)
.stdout(Stdio::null())
.stderr(Stdio::null())
.status()
.output()
.expect("failed to execute `wasm`");
if exit_status.success() {
if output.status.success() {
Ok(())
} else {
dump_all_into_buf(&output.stdout, stdout_msg_buf);
dump_all_into_buf(&output.stderr, stderr_msg_buf);
Err(())
}
}
@ -47,10 +54,17 @@ fn run_wasmi(data: &[u8]) -> Result<(), ()> {
fn main() {
loop {
fuzz!(|data: &[u8]| {
let wasmi_result = run_wasmi(data);
let wasm_result = run_spec(data);
// Keep messages on stack. This should lead to a different stack hashes for
// different error messages.
let mut stdout_msg_buf: [u8; 64] = [0; 64];
let mut stderr_msg_buf: [u8; 64] = [0; 64];
assert_eq!(wasmi_result.is_ok(), wasm_result.is_ok());
let wasmi_result = run_wasmi(data);
let wasm_result = run_spec(data, &mut stdout_msg_buf, &mut stderr_msg_buf);
if wasmi_result.is_ok() != wasm_result.is_ok() {
panic!("stdout: {:?}, stderr: {:?}", &stdout_msg_buf[..], &stderr_msg_buf as &[u8]);
}
});
}
}