// Test that compiling using a PCH doesn't leak file descriptors.
// https://bugs.chromium.org/p/chromium/issues/detail?id=924225
//
// This test uses ulimit.
// UNSUPPORTED: system-windows
//
// Set up source files. lib/lib.h includes lots of lib*.h files in that dir.
// client.c includes lib/lib.h, and also the individual files directly.
//
// RUN: rm -rf %t
// RUN: mkdir %t
// RUN: cd %t
// RUN: mkdir lib
// RUN: %python -c "from pathlib import Path; list(map(lambda i: Path(f'lib/lib{i}.h').touch(), range(1, 301)))"
// RUN: %python -c "for i in range(1, 301): print(f'#include \"lib{i}.h\"')" > lib/lib.h
// RUN: echo "#include \"lib/lib.h\"" > client.c
// RUN: %python -c "for i in range(1, 301): print(f'#include \"lib/lib{i}.h\"')" > client.c
//
// We want to verify that we don't hold all the files open at the same time.
// This is important e.g. on mac, which has a low default FD limit.
// RUN: ulimit -n 100
//
// Test without PCH.
// RUN: %clang_cc1 -fsyntax-only -Ilib/ client.c
//
// Test with PCH.
// RUN: %clang_cc1 -emit-pch -o pch -Ilib/ client.c
// RUN: %clang_cc1 -include-pch pch -Ilib/ client.c -fsyntax-only