Large Vector Causes Debugger to Completely Freeze

Environment

• OS and version: macOS 13.5.2
• VS Code: 13.5.2
• C/C++ extension: 1.18.2
• OS and version of remote machine (if applicable): n/a
• GDB / LLDB version: 1400.0.38.17

Bug Summary and Steps to Reproduce

Bug Summary:

Program runs fine without debugging, and I can debug until I try to populate an vector with ~30M entries. I get a spinner in the Locals portion of the debugger and I can't continue.

(see for similar
https://github.com/Microsoft/vscode/issues/26660
https://github.com/microsoft/vscode/issues/76798
)

Offending function that reads from Binary file

std::vector<uint8_t> FileIO::ReadFileToBuffer(const fs::path &filepath)
    {
        // Validate the file path
        std::error_code ec;
        if (!std::filesystem::exists(filepath, ec) || ec)
        {
            throw std::runtime_error("File does not exist: " + filepath.string());
        }

        // Open the file in binary mode
        std::ifstream file(filepath, std::ios::binary);
        if (!file)
        {
            throw std::runtime_error("Unable to open file: " + filepath.string());
        }

        // Seek to the end of the file to find its size
        file.seekg(0, std::ios::end);
        std::streamsize size = file.tellg();
        file.seekg(0, std::ios::beg); // Seek back to the start of the file

        // Create a buffer to store the data
        std::vector<uint8_t> buffer(size);

        // Read the data from the file into the buffer
        if (!file.read(reinterpret_cast<char *>(buffer.data()), size))
        {
            throw std::runtime_error("Error reading file: " + filepath.string());
        }

        return buffer;
    }

CMakeLists.txt

# https://chat.openai.com/share/390a47d7-310c-4e55-81d2-8e5a6fc84e64

cmake_minimum_required(VERSION 3.14)
project(fhmm)

# Specify the C++ standard
set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED True)

# Define a macro with the root path of the project
add_definitions(-DPROJECT_ROOT_PATH="${CMAKE_SOURCE_DIR}")

# Include directories
include_directories(include ${CMAKE_SOURCE_DIR}/extern/Eigen)

# Define the source files for the library
set(LIB_SOURCE_FILES
    src/hmm.cpp
    src/fileIO.cpp
    src/utility.cpp
    # ... other library source files
)

# Define the source file for the executable
set(EXE_SOURCE_FILES
    src/main.cpp
    # ... other executable source files if needed
)

# Define the library target
add_library(fhmm SHARED ${LIB_SOURCE_FILES})
target_compile_definitions(fhmm PRIVATE BUILDING_FHMM)

# Define the executable target
add_executable(FHMMExecutable ${EXE_SOURCE_FILES})

# Link the executable to FHMM library
target_link_libraries(FHMMExecutable fhmm)

# For Unix-like systems, enforce position-independent code
set_target_properties(fhmm PROPERTIES POSITION_INDEPENDENT_CODE ON)

# Set the output directory for the build executables and libraries
set(CMAKE_RUNTIME_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/bin")
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")
set(CMAKE_ARCHIVE_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")

# Installation rules
install(TARGETS fhmm FHMMExecutable DESTINATION bin)
install(FILES 
    include/hmm.h 
    include/fileIO.h
    include/utility.h
    DESTINATION include)

Debugger Configurations

launch.json

{
  "version": "0.2.0",
  "configurations": [
      {
          "name": "(lldb) Launch",
          "type": "cppdbg",
          "request": "launch",
          "targetArchitecture": "arm64",
          // Resolved by CMake Tools:
          "program": "${command:cmake.launchTargetPath}",
          "args": [],
          "stopAtEntry": false,
          "cwd": "${workspaceFolder}",
          "environment": [
              {
                  // add the directory where our target was built to the PATHs
                  // it gets resolved by CMake Tools:
                  "name": "PATH",
                  "value": "${env:PATH}:${command:cmake.getLaunchTargetDirectory}"
              },
          ],
          "MIMode": "lldb",
      }
  ]
}

Debugger Logs

(tail of logs, total too long)

<details>
  <summary>logs</summary>
   1: (6849) <-1040-stack-list-variables 0 --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6850) ->1040^done,variables=[{name=\"projectRoot\"},{name=\"subPath\"},{name=\"filename\"},{name=\"fullPath\"},{name=\"utility\"},{name=\"fileIO\"},{name=\"buffer\"},{name=\"data\"}]\n"},"seq":912}
  1: (6850) ->1040^done,variables=[{name="projectRoot"},{name="subPath"},{name="filename"},{name="fullPath"},{name="utility"},{name="fileIO"},{name="buffer"},{name="data"}]
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6850) ->(gdb)\n"},"seq":914}
  1: (6850) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6850) 1040: elapsed time 1\n"},"seq":916}
  1: (6850) 1040: elapsed time 1
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6850) <-1041-var-create - - \"projectRoot\" --thread 1 --frame 0\n"},"seq":918}
  1: (6850) <-1041-var-create - - "projectRoot" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6851) ->1041^done,name=\"var10\",numchild=\"2\",value=\"{...}\",type=\"std::filesystem::__cxx11::path\",thread-id=\"1\",has_more=\"0\"\n"},"seq":920}
  1: (6851) ->1041^done,name="var10",numchild="2",value="{...}",type="std::filesystem::__cxx11::path",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6851) ->(gdb)\n"},"seq":922}
  1: (6851) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6851) 1041: elapsed time 0\n"},"seq":924}
  1: (6851) 1041: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6851) <-1042-var-create - - \"subPath\" --thread 1 --frame 0\n"},"seq":926}
  1: (6851) <-1042-var-create - - "subPath" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6852) ->1042^done,name=\"var11\",numchild=\"2\",value=\"{...}\",type=\"std::filesystem::__cxx11::path\",thread-id=\"1\",has_more=\"0\"\n"},"seq":928}
  1: (6852) ->1042^done,name="var11",numchild="2",value="{...}",type="std::filesystem::__cxx11::path",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6852) ->(gdb)\n"},"seq":930}
  1: (6852) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6852) 1042: elapsed time 0\n"},"seq":932}
  1: (6852) 1042: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6852) <-1043-var-create - - \"filename\" --thread 1 --frame 0\n"},"seq":934}
  1: (6852) <-1043-var-create - - "filename" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6853) ->1043^done,name=\"var12\",numchild=\"2\",value=\"{...}\",type=\"std::filesystem::__cxx11::path\",thread-id=\"1\",has_more=\"0\"\n"},"seq":936}
  1: (6853) ->1043^done,name="var12",numchild="2",value="{...}",type="std::filesystem::__cxx11::path",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6853) ->(gdb)\n"},"seq":938}
  1: (6853) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6853) 1043: elapsed time 0\n"},"seq":940}
  1: (6853) 1043: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6853) <-1044-var-create - - \"fullPath\" --thread 1 --frame 0\n"},"seq":942}
  1: (6853) <-1044-var-create - - "fullPath" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) ->1044^done,name=\"var13\",numchild=\"2\",value=\"{...}\",type=\"std::filesystem::__cxx11::path\",thread-id=\"1\",has_more=\"0\"\n"},"seq":944}
  1: (6854) ->1044^done,name="var13",numchild="2",value="{...}",type="std::filesystem::__cxx11::path",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) ->(gdb)\n"},"seq":946}
  1: (6854) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) 1044: elapsed time 0\n"},"seq":948}
  1: (6854) 1044: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) <-1045-var-create - - \"utility\" --thread 1 --frame 0\n"},"seq":950}
  1: (6854) <-1045-var-create - - "utility" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) ->1045^done,name=\"var14\",numchild=\"0\",value=\"??\",type=\"fluxus::Utility\",thread-id=\"1\",has_more=\"0\"\n"},"seq":952}
  1: (6854) ->1045^done,name="var14",numchild="0",value="??",type="fluxus::Utility",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) ->(gdb)\n"},"seq":954}
  1: (6854) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6854) 1045: elapsed time 0\n"},"seq":956}
  1: (6854) 1045: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6855) <-1046-var-create - - \"fileIO\" --thread 1 --frame 0\n"},"seq":958}
  1: (6855) <-1046-var-create - - "fileIO" --thread 1 --frame 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6855) ->1046^done,name=\"var15\",numchild=\"0\",value=\"??\",type=\"fluxus::FileIO\",thread-id=\"1\",has_more=\"0\"\n"},"seq":960}
  1: (6855) ->1046^done,name="var15",numchild="0",value="??",type="fluxus::FileIO",thread-id="1",has_more="0"
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6855) ->(gdb)\n"},"seq":962}
  1: (6855) ->(gdb)
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6855) 1046: elapsed time 0\n"},"seq":964}
  1: (6855) 1046: elapsed time 0
  --> E (output): {"type":"event","event":"output","body":{"category":"console","output":"1: (6855) <-1047-var-create - - \"buffer\" --thread 1 --frame 0\n"},"seq":966}

Other Extensions

CMake Pack

Additional Information

No response

Start by reproducing the freeze with the C++ function shown in the issue, using the provided launch.json and CMakeLists.txt. Inspect the debugger log around stack-list-variables and the buffer local; done means a roughly 30-million-entry vector no longer leaves the Locals view spinning or prevents continuing.