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Defined in header <debugging> | ||
void breakpoint()noexcept; | (since C++26) | |
Unconditional breakpoint: Attempts to temporarily stop program execution and pass control to the debugger, regardless of whether the presence of a debugger can be detected. The behavior of this function is implementation-defined.
Contents |
The intent of this function is allowing for runtime control of breakpoints beyond what might be available from a debugger while not causing the program to exit. For example, breaking when an infrequent non-critical condition is detected, allowing programmatic control with complex runtime sensitive conditions, breaking on user input to inspect context in interactive programs without needing to switch to the debugger application, etc.
This function standardizes many similar existing facilities:__builtin_debugtrap from LLVM,__debugbreak from Win32 API,debugger_break fromboost.test,assert(false),_asm{int3} (MSVC) andasm("int3") (GCC/clang) for x86 targets,etc.
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_debugging | 202311L | (C++26) | Debugging support library |
202403L | (C++26) | Replaceablestd::is_debugger_present |
| This section is incomplete Reason: no example |
(C++26) | checks whether a program is running under the control of a debugger (function)[edit] |
(C++26) | callsstd::breakpoint ifstd::is_debugger_present returnstrue (function)[edit] |
| 1. | armKEIL:__breakpoint intrinsic |
| 2. | Portable Snippets:Debugging assertions and traps |
| 3. | EASTL:EASTL_DEBUG_BREAK |
| 4. | Catch2:CATCH_TRAP andCATCH_BREAK_INTO_DEBUGGER |
| 5. | Unreal Engine:DebugBreak |
| 6. | JUCE:JUCE_BREAK_IN_DEBUGGER |
| 7. | Dear ImGui:IM_DEBUG_BREAK |
| 8. | AWS C Common:aws_debug_break |
