From cfc5eb065befd87e2decb05b7ac46cecf133c8c2 Mon Sep 17 00:00:00 2001
From: Fabian Meumertzheim <meumertzheim@code-intelligence.com>
Date: Mon, 6 Nov 2023 15:42:23 +0100
Subject: [PATCH] driver: Fix startup crashes when fuzzing native libraries

Fixes a JVM crash with the following frame while fuzzing native
libraries:
```
[libstdc++.so.6+0x13bf8a]  std::ostream::sentry::sentry(std::ostream&)+0x1a
```
---
 .../code_intelligence/jazzer/driver/libfuzzer_callbacks.cpp    | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/main/native/com/code_intelligence/jazzer/driver/libfuzzer_callbacks.cpp b/src/main/native/com/code_intelligence/jazzer/driver/libfuzzer_callbacks.cpp
index b7a0df5d9..b576f0f13 100644
--- a/src/main/native/com/code_intelligence/jazzer/driver/libfuzzer_callbacks.cpp
+++ b/src/main/native/com/code_intelligence/jazzer/driver/libfuzzer_callbacks.cpp
@@ -119,6 +119,9 @@ extern "C" [[maybe_unused]] bool __sanitizer_weak_is_relevant_pc(
 Java_com_code_1intelligence_jazzer_runtime_TraceDataFlowNativeCallbacks_handleLibraryLoad(
     JNIEnv *, jclass) {
   std::call_once(ignore_list_flag, [] {
+    // Force std::cout to be fully initialized.
+    // https://gcc.gnu.org/bugzilla/show_bug.cgi?id=26123
+    static std::ios_base::Init initIostreams;
     std::cout << "INFO: detected a native library load, enabling interception "
                  "for libc functions"
               << std::endl;