64 lines
2.4 KiB
TypeScript
64 lines
2.4 KiB
TypeScript
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import { expect, test } from "bun:test";
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import { bunEnv, bunExe, isMacOS, isWindows, tempDir } from "harness";
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import { join } from "node:path";
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// https://github.com/oven-sh/bun/issues/31503
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// `bun --bun` overflowed the resolver's process-global filename interner and panicked
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// with `index out of bounds: the len is 4095 but the index is 4095`.
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//
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// Interning >270272 long names reproduces it from one small directory: the dir cache
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// keys on the literal path spelling, so resolving through N symlinks to it does N
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// re-reads, and the append-only interner re-appends every name (mixed-case >31-byte
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// names intern twice). 300 files * 2 * 500 symlinks = 300000.
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const FILES = 300;
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const SPELLINGS = 500;
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const LONG_PREFIX = "ZzThisIsAFilenameWellOverThirtyOneBytesLong_";
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const DRIVER = /* js */ `
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const fs = require("fs");
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const path = require("path");
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const base = process.argv[2];
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const files = Number(process.argv[3]);
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const spellings = Number(process.argv[4]);
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const prefix = ${JSON.stringify(LONG_PREFIX)};
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const real = path.join(base, "real");
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fs.mkdirSync(real, { recursive: true });
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for (let i = 0; i < files; i++) {
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fs.closeSync(fs.openSync(path.join(real, prefix + i + ".js"), "w"));
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}
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fs.closeSync(fs.openSync(path.join(real, "target.js"), "w"));
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for (let s = 0; s < spellings; s++) {
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const link = path.join(base, "s" + s);
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fs.symlinkSync(real, link, "dir");
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Bun.resolveSync("./target.js", link);
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}
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console.log("resolved-ok");
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`;
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// Skipped on Windows (dir symlinks need privileges) and macOS (resolving through
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// ~500 symlinks exhausts its low default fd limit, so `Bun.resolveSync` throws).
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// The overflowing code path is in the libc/arch-independent allocator, so Linux
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// (glibc + musl, x64 + aarch64) coverage is sufficient.
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test.skipIf(isWindows || isMacOS)(
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"resolver filename store survives interning >270k long names (#31503)",
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async () => {
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using dir = tempDir("issue-31503", { "driver.js": DRIVER });
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const driverJs = join(String(dir), "driver.js");
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const base = join(String(dir), "tree");
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await using proc = Bun.spawn({
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cmd: [bunExe(), driverJs, base, String(FILES), String(SPELLINGS)],
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env: bunEnv,
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stderr: "pipe",
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stdout: "pipe",
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});
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const [stdout, stderr, exitCode] = await Promise.all([proc.stdout.text(), proc.stderr.text(), proc.exited]);
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expect({ stdout: stdout.trim(), exitCode, stderr }).toMatchObject({
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stdout: "resolved-ok",
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exitCode: 0,
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});
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},
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30_000,
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);
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