Subject: [BUG] Crash in FFM when calling native function with std::make_unique<RtcManager>

[bai li]

Hi Panama team,

I’m using the Java FFM API in JDK 21 to call a C++ dynamic library
function, `void createRtcContext(const char* localId, int logLevel,
IceConfig* iceConfig, DataChannelConfig* dataChannelConfig)`. The function
can be invoked, but it crashes when executing
`std::make_unique<RtcManager>()` inside the function. The same C++ code
runs without any issues when executed independently. The `RtcManager` class
is roughly defined as follows:

```cpp
class RtcManager {
private:
    std::string localId;
    rtc::Configuration config;
    std::unordered_map<std::string, std::shared_ptr<rtc::PeerConnection>>
peerConnectionMap;
    std::unordered_map<std::string, std::shared_ptr<rtc::DataChannel>>
dataChannelMap;
    std::shared_ptr<rtc::WebSocket> ws = std::make_shared<rtc::WebSocket>();
    std::shared_ptr<DataChannelListener> dataChannelListener = nullptr;
public:
    explicit RtcManager(const std::string& id) : localId(id) {}
};
The C++ code is compiled with MSVC 2022. Here’s the crash log from the
console:
# A fatal error has been detected by the Java Runtime Environment:
#
#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x00007ffb0ca62f58,
pid=22096, tid=26348
#
# JRE version: Java(TM) SE Runtime Environment (21.0.6+8) (build
21.0.6+8-LTS-188)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (21.0.6+8-LTS-188, mixed mode,
sharing, tiered, compressed oops, compressed class ptrs, g1 gc,
windows-amd64)
# Problematic frame:
# C  [msvcp140.dll+0x12f58]
#
# No core dump will be written. Minidumps are not enabled by default on
client versions of Windows
#
# An error report file with more information is saved as:
# E:\projects\backend-projects\test\hs_err_pid22096.log
[0.236s][warning][os] Loading hsdis library failed
#
# If you would like to submit a bug report, please visit:
#   https://bugreport.java.com/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.
#
Thanks
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