From f7cdff7bddcb168094b569b15d2bfaef0526c244 Mon Sep 17 00:00:00 2001
From: Takuto Ikuta <tikuta@google.com>
Date: Thu, 10 Jul 2025 17:56:08 +0900
Subject: [PATCH] [compiler-rt] Include missing headers for libFuzzer (#146828)

This is to fix modules build errors in chromium like
*
https://ci.chromium.org/ui/p/chromium/builders/try/linux-libfuzzer-asan-rel/2292144/overview
*
https://ci.chromium.org/ui/p/chromium/builders/try/linux-libfuzzer-asan-rel/2292444/overview

---------

Co-authored-by: Petr Hosek <phosek@google.com>
---
 compiler-rt/lib/fuzzer/FuzzerDriver.cpp  | 3 ++-
 compiler-rt/lib/fuzzer/FuzzerIOPosix.cpp | 1 +
 compiler-rt/lib/fuzzer/FuzzerRandom.h    | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/compiler-rt/lib/fuzzer/FuzzerDriver.cpp b/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
index 3771abf5f532..40322e231602 100644
--- a/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerDriver.cpp
@@ -24,10 +24,11 @@
 #include <chrono>
 #include <cstdlib>
 #include <cstring>
+#include <fstream>
+#include <functional>
 #include <mutex>
 #include <string>
 #include <thread>
-#include <fstream>
 
 // This function should be present in the libFuzzer so that the client
 // binary can test for its existence.
diff --git a/compiler-rt/lib/fuzzer/FuzzerIOPosix.cpp b/compiler-rt/lib/fuzzer/FuzzerIOPosix.cpp
index 3700fb098e55..f145dddcbb29 100644
--- a/compiler-rt/lib/fuzzer/FuzzerIOPosix.cpp
+++ b/compiler-rt/lib/fuzzer/FuzzerIOPosix.cpp
@@ -12,6 +12,7 @@
 
 #include "FuzzerExtFunctions.h"
 #include "FuzzerIO.h"
+#include <cerrno>
 #include <cstdarg>
 #include <cstdio>
 #include <dirent.h>
diff --git a/compiler-rt/lib/fuzzer/FuzzerRandom.h b/compiler-rt/lib/fuzzer/FuzzerRandom.h
index ad6c07eb5ef5..b12fc21a1855 100644
--- a/compiler-rt/lib/fuzzer/FuzzerRandom.h
+++ b/compiler-rt/lib/fuzzer/FuzzerRandom.h
@@ -11,6 +11,7 @@
 #ifndef LLVM_FUZZER_RANDOM_H
 #define LLVM_FUZZER_RANDOM_H
 
+#include <cmath>
 #include <random>
 
 namespace fuzzer {