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Diffstat (limited to 'tests/drivers/fuzz_wasm.js')
| -rw-r--r-- | tests/drivers/fuzz_wasm.js | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/tests/drivers/fuzz_wasm.js b/tests/drivers/fuzz_wasm.js new file mode 100644 index 0000000..b0982d4 --- /dev/null +++ b/tests/drivers/fuzz_wasm.js @@ -0,0 +1,38 @@ +// Deterministic compiler/runtime/stdlib fuzzing through the WebAssembly host. +// Usage: node tests/drivers/fuzz_wasm.js path/to/zc.wasm +const fs = require('fs'); +const ZC = require('../../src/web/zc.js'); + +let state = 0x5a17; +function next() { state = (Math.imul(state, 1664525) + 1013904223) >>> 0; return state; } +function expr(depth) { + if (!depth || next() % 4 === 0) { const n = next() % 10; return [String(n), n]; } + const [left, a] = expr(depth - 1), [right, b] = expr(depth - 1), op = ['+', '-', '*'][next() % 3]; + return [`(${left} ${op} ${right})`, op === '+' ? a + b : op === '-' ? a - b : a * b]; +} +function quote(s) { return '"' + s + '"'; } + +(async () => { + const lines = ['include std;', 'fn churn(n) { int i = 0; while (i < n) { { int* p = new(int); *p = i; } i++; } return 0; }', 'fn stable() { return 73; }', 'fn main() {', ' let base = live_objects();']; + const expected = []; + for (let i = 0; i < 128; i++) { + const [source, value] = expr(4); + lines.push(` put_n(${source}); put_c(32);`); expected.push(value); + } + for (let i = 0; i < 32; i++) { + const a = Array.from({ length: next() % 11 }, () => 'abc'[next() % 3]).join(''); + const b = Array.from({ length: next() % 6 }, () => 'abc'[next() % 3]).join(''); + lines.push(` put_n(Text.len(${quote(a)})); put_c(32); put_n(Text.eq(${quote(a)}, ${quote(b)})); put_c(32);`); + lines.push(` put_n(Text.starts(${quote(a)}, ${quote(b)})); put_c(32); put_n(Text.ends(${quote(a)}, ${quote(b)})); put_c(32); put_n(Text.find(${quote(a)}, ${quote(b)})); put_c(32);`); + lines.push(` put_n(Bytes.len(b${quote(a)})); put_c(32); put_n(Bytes.eq(b${quote(a)}, b${quote(b)})); put_c(32);`); + lines.push(` put_n(Bytes.starts(b${quote(a)}, b${quote(b)})); put_c(32); put_n(Bytes.ends(b${quote(a)}, b${quote(b)})); put_c(32); put_n(Bytes.find(b${quote(a)}, b${quote(b)})); put_c(32);`); + expected.push(a.length, Number(a === b), Number(a.startsWith(b)), Number(a.endsWith(b)), a.indexOf(b), a.length, Number(a === b), Number(a.startsWith(b)), Number(a.endsWith(b)), a.indexOf(b)); + } + lines.push(' churn(300); gc(); put_n(live_objects() - base); put_c(32);', ' put_n(stable()); put_c(10);', ' return 0;', '}'); + expected.push(0, 73); + const source = lines.join('\n') + '\n', want = expected.join(' ') + '\n'; + const zc = await ZC.load(fs.readFileSync(process.argv[2] || 'src/web/zc.wasm')); + const result = await zc.run(source); + if (result.output !== want) throw new Error(`wasm fuzz mismatch\nexpected: ${want.slice(0, 180)}\nactual: ${result.output.slice(0, 180)}\nmessages: ${result.messages}`); + console.log('ok wasm compiler/runtime/stdlib fuzz: 128 expressions, 300 scoped allocations and GC, and 32 Text/Bytes cases'); +})().catch(error => { console.error(error); process.exitCode = 1; }); |