Files
DroidDeck/tools/tests/test_fakeinput_reentry.py
Kurt Himebauch c85b84a964 fix(input): fakeinput no longer aborts programs whose allocator calls a hooked function at startup (#2361)
* fix(input): fakeinput no longer aborts programs whose allocator calls a hooked function at startup

* fix(ctl): screenshot finds display ids that the device name carries inline

* fix(input): fakeinput registers its fork handlers before other threads see its config
2026-11-09 16:41:26 -05:00

59 lines
2.0 KiB
Python

from pathlib import Path
import os
import shutil
import subprocess
import sys
import tempfile
import unittest
SOURCE = Path(__file__).resolve().parents[2] / "app/src/main/cpp/fakeinput_steam.cpp"
# Stands in for an allocator like mimalloc that calls access() while it starts up (Claude Code
# probes /sys/devices/system/node/node1 on its first allocation, which comes from fakeinput's
# constructor when it is preloaded).
PROGRAM = r"""
#define _GNU_SOURCE
#include <stddef.h>
#include <stdio.h>
#include <unistd.h>
extern void *__libc_malloc(size_t);
static int started;
void *malloc(size_t size) {
if (!started) {
started = 1;
access("/sys/devices/system/node/node1", R_OK);
}
return __libc_malloc(size);
}
int main(void) {
puts("ok");
return 0;
}
"""
@unittest.skipUnless(sys.platform == "linux" and shutil.which("gcc") and shutil.which("g++"),
"needs Linux, gcc and g++")
class FakeinputReentryTest(unittest.TestCase):
def test_allocator_calling_hooks_during_first_allocation_survives_preload(self):
with tempfile.TemporaryDirectory() as tmp:
path = Path(tmp)
(path / "program.c").write_text(PROGRAM)
subprocess.run(["gcc", "-rdynamic", "-o", str(path / "program"), str(path / "program.c")], check=True)
subprocess.run(["g++", "-shared", "-fPIC", "-O2", "-Wno-attributes", "-pthread",
"-std=c++17", "-static-libstdc++", "-static-libgcc",
"-Wl,--exclude-libs,ALL", "-o", str(path / "libfakeinput.so"),
str(SOURCE), "-ldl"], check=True)
result = subprocess.run([str(path / "program")],
env=dict(os.environ, LD_PRELOAD=str(path / "libfakeinput.so")),
capture_output=True, text=True, timeout=10)
self.assertEqual(result.returncode, 0, result.stderr)
self.assertEqual(result.stdout, "ok\n")
if __name__ == "__main__":
unittest.main()