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+
+
+
+qemu-user uses fixed stack size and ignores RLIMIT_STACK request, causing some guest programs to crash
+Description of problem:
+When compiling a source file, g++ segmentation faults in qemu-user riscv64. But it doesn't fail on real riscv64 boards.
+
+We discovered this problem while compiling nodejs-lts-hydrogen. The source file has been reduced to 5KB by cvise.
+Steps to reproduce:
+1. Setup an Arch Linux riscv64 qemu-user container: https://github.com/felixonmars/archriscv-packages/wiki/Setup-Arch-Linux-RISC-V-Development-Environment
+2. Start the container: `sudo systemd-nspawn -D ./archriscv -a -U`
+3. Install gcc inside the container: `sudo pacman -Syu gcc`
+4. Run the following command in the container: `g++ -S testcase.i -w -fpreprocessed -o /dev/null` [testcase.i](/uploads/d63b1867a458a240ef0d90c760d76bc7/testcase.i)
+5. g++ segmentation faults: `g++: internal compiler error: Segmentation fault signal terminated program cc1plus`
+Additional information:
+Initially I thought this is a g++ bug. But I can't reproduce this bug on real riscv64 hardware.
+
+g++ version: g++ (GCC) 13.2.1 20230801
+
+testcase.i:
+
+```c++
+namespace std {
+typedef long unsigned size_t;
+inline namespace __cxx11 {}
+} // namespace std
+typedef char uint8_t;
+namespace std {
+template <typename _Default, typename, template <typename> class>
+struct __detector {
+  using type = _Default;
+};
+template <typename _Default, template <typename> class _Op>
+using __detected_or = __detector<_Default, void, _Op>;
+template <typename _Default, template <typename> class _Op>
+using __detected_or_t = typename __detected_or<_Default, _Op>::type;
+template <typename> class allocator;
+namespace __cxx11 {
+template <typename _CharT, typename = _CharT, typename = allocator<_CharT>>
+class basic_string;
+}
+typedef basic_string<char> string;
+} // namespace std
+template <typename _Tp> class __new_allocator {
+public:
+  typedef _Tp value_type;
+};
+namespace std {
+template <typename _Tp> using __allocator_base = __new_allocator<_Tp>;
+template <typename _Tp> class allocator : public __allocator_base<_Tp> {};
+template <class _E> class initializer_list {
+  typedef size_t size_type;
+  typedef _E *iterator;
+  iterator _M_array;
+  size_type _M_len;
+};
+struct __allocator_traits_base {
+  template <typename _Tp> using __pointer = typename _Tp::const_pointer;
+};
+template <typename _Alloc> struct allocator_traits : __allocator_traits_base {
+  typedef typename _Alloc::value_type value_type;
+  using pointer = __detected_or_t<value_type, __pointer>;
+};
+} // namespace std
+namespace __gnu_cxx {
+template <typename _Alloc>
+struct __alloc_traits : std::allocator_traits<_Alloc> {};
+} // namespace __gnu_cxx
+namespace std {
+namespace __cxx11 {
+template <typename _CharT, typename, typename _Alloc> class basic_string {
+  typedef __gnu_cxx::__alloc_traits<_Alloc> _Alloc_traits;
+
+public:
+  typedef typename _Alloc_traits::pointer pointer;
+  struct _Alloc_hider {
+    _Alloc_hider(pointer, _Alloc);
+  } _M_dataplus;
+  pointer _M_local_data();
+  basic_string(_CharT *, _Alloc __a = _Alloc())
+      : _M_dataplus(_M_local_data(), __a) {}
+  ~basic_string();
+};
+} // namespace __cxx11
+} // namespace std
+namespace v8 {
+class StartupData {};
+} // namespace v8
+namespace std {
+template <typename _Tp> class vector {
+public:
+  typedef _Tp value_type;
+  vector(initializer_list<value_type>);
+};
+namespace builtins {
+struct CodeCacheInfo {
+  string id;
+  vector<uint8_t> data;
+};
+} // namespace builtins
+struct IsolateDataSerializeInfo {};
+struct EnvSerializeInfo {};
+struct SnapshotMetadata {
+  enum { kDefault } type;
+  string node_version;
+  string node_arch;
+  string v8_cache_version_tag;
+};
+struct SnapshotData {
+  enum { kNotOwned } data_ownership;
+  SnapshotMetadata metadata;
+  v8::StartupData v8_snapshot_blob_data;
+  IsolateDataSerializeInfo isolate_data_info;
+  EnvSerializeInfo env_info;
+  vector<builtins::CodeCacheInfo> code_cache;
+} snapshot_data{
+    SnapshotData::kNotOwned,
+    SnapshotMetadata::kDefault,
+    "",
+    "",
+    "",
+    {},
+    {},
+    {},
+    {{""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+     {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}}};
+} // namespace std
+```