llvm-project/clang/test/Driver/sigpipe-handling.c

// REQUIRES: shell
// RUN: %clang -E -fno-integrated-cc1 %s | head | FileCheck %s

// Test that the parent clang driver process doesn't crash when the child cc1
// process receives a SIGPIPE (Unix-only).
//
// The child should exit with IO_ERR, and the parent should exit cleanly.

// CHECK: sigpipe-handling.c
[InitLLVM] Ensure SIGPIPE handler installed before sigaction() The pipe signal handler must be installed before any other handlers are registered. This is because the Unix RegisterHandlers function does not perform a sigaction() for SIGPIPE unless a one-shot handler is present, to allow long-lived processes (like lldb) to fully opt-out of llvm's SIGPIPE handling and ignore the signal safely. Fixes a bug introduced in D70277. Tested by running Nick's test case: % xcrun ./bin/clang -E -fno-integrated-cc1 x.c \| tee foo.txt \| head I verified that child cc1 process exits with IO_ERR, and that the parent recognizes the error code, exiting cleanly. Differential Revision: https://reviews.llvm.org/D94324 2021-01-09 03:08:52 +08:00			`// REQUIRES: shell`
			`// RUN: %clang -E -fno-integrated-cc1 %s \| head \| FileCheck %s`

			`// Test that the parent clang driver process doesn't crash when the child cc1`
			`// process receives a SIGPIPE (Unix-only).`
			`//`
			`// The child should exit with IO_ERR, and the parent should exit cleanly.`

			`// CHECK: sigpipe-handling.c`