1. std::bad_alloc 异常是什么 std::bad_alloc 是C++ 标准库中的一个异常类,继承自 std::exception。当程序尝试分配内存但系统无法满足请求时,C++ 运行时库会抛出 std::bad_alloc 异常。这通常意味着系统内存不足,无法为程序提供所需的内存空间。
First-chance exception at 0x753d9673 in ...exe: Microsoft C++ exception: std::bad_alloc at memory location 0x0031b414.. Unhandled exception at 0x753d9673 in ...exe: Microsoft C++ exception: std::bad_alloc at memory location 0x0031b414..and...
exceptions are allocated on the heap when thrown (except forstd::bad_allocin some cases), and this function simply creates the smart pointer referencing the previously-allocated object, On MSVC, exceptions are allocated on stack when thrown, and this function performs the heap allocation and copie...
Otherwise,std::bad_allocor the exception thrown when copying the exception object, if allocation or copying fails, respectively. Notes BeforeP1675R2,rethrow_exceptionwas not allowed to copy the exception object, which is unimplementable on some platforms where exception objects are allocated on the ...
In below example for std::bad_alloc.#include <iostream> #include <new> int main() { try { while (true) { new int[100000000ul]; } } catch (const std::bad_alloc& e) { std::cout << "Allocation failed: " << e.what() << '\n'; } } ...
First-chance exception at 0x753d9673 in ...exe: Microsoft C++ exception: std::bad_alloc at memory location 0x0031b414.. Unhandled exception at 0x753d9673 in ...exe: Microsoft C++ exception: std::bad_alloc at memory location 0x0031b414..and...