[libc] fix EXPECT_EXIT suspend/timeout for darwin

[bojle]

Fixes: #166059

[llvmbot]

@llvm/pr-subscribers-libc

Author: Shreeyash Pandey (bojle)

Changes

Fixes: #166059

---

Full diff: https://github.com/llvm/llvm-project/pull/166065.diff

2 Files Affected:

• (modified) libc/test/UnitTest/CMakeLists.txt (+1-1)
• (modified) libc/test/UnitTest/ExecuteFunctionUnix.cpp (+2-1)

diff --git a/libc/test/UnitTest/CMakeLists.txt b/libc/test/UnitTest/CMakeLists.txt
index 31d1e9dce8204..028e8e3a2ea67 100644
--- a/libc/test/UnitTest/CMakeLists.txt
+++ b/libc/test/UnitTest/CMakeLists.txt
@@ -83,7 +83,7 @@ add_unittest_framework_library(
 )
 
 set(libc_death_test_srcs LibcDeathTestExecutors.cpp)
-if(${LIBC_TARGET_OS} STREQUAL "linux")
+if(${LIBC_TARGET_OS} STREQUAL "linux" OR ${LIBC_TARGET_OS} STREQUAL "darwin")
   list(APPEND libc_death_test_srcs ExecuteFunctionUnix.cpp)
 endif()
 
diff --git a/libc/test/UnitTest/ExecuteFunctionUnix.cpp b/libc/test/UnitTest/ExecuteFunctionUnix.cpp
index c0e85c2144005..0b450578adde2 100644
--- a/libc/test/UnitTest/ExecuteFunctionUnix.cpp
+++ b/libc/test/UnitTest/ExecuteFunctionUnix.cpp
@@ -13,6 +13,7 @@
 #include <poll.h>
 #include <signal.h>
 #include <stdio.h>
+#include <errno.h>
 #include <stdlib.h>
 #include <string.h>
 #include <sys/wait.h>
@@ -58,7 +59,7 @@ ProcessStatus invoke_in_subprocess(FunctionCaller *func, int timeout_ms) {
   ::close(pipe_fds[1]);
 
   struct pollfd poll_fd {
-    pipe_fds[0], 0, 0
+    pipe_fds[0], POLLIN, 0
   };
   // No events requested so this call will only return after the timeout or if
   // the pipes peer was closed, signaling the process exited.

[github-actions]

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[bojle]

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