Difference between revisions of "cpp/utility/breakpoint"
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void breakpoint() noexcept; | void breakpoint() noexcept; | ||
Latest revision as of 20:55, 30 October 2024
| Defined in header <debugging>
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| 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 |
[edit] Notes
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 from boost.test, assert(false), _asm { int 3 } (MSVC) and asm("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) | Replaceable std::is_debugger_present
|
[edit] Example
| This section is incomplete Reason: no example |
[edit] See also
| (C++26) |
checks whether a program is running under the control of a debugger (function) |
| (C++26) |
calls std::breakpoint if std::is_debugger_present returns true (function) |
[edit] External links
| 1. | armKEIL: __breakpoint intrinsic
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| 2. | Portable Snippets: Debugging assertions and traps |
| 3. | EASTL: EASTL_DEBUG_BREAK
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| 4. | Catch2: CATCH_TRAP and CATCH_BREAK_INTO_DEBUGGER
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| 5. | Unreal Engine: DebugBreak
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| 6. | JUCE: JUCE_BREAK_IN_DEBUGGER
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| 7. | Dear ImGui: IM_DEBUG_BREAK
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| 8. | AWS C Common: aws_debug_break
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