How C++ exception implemented (using Setjump() & Longjump() ?) [duplicate]

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Dear All,

I want to know, how C++ exception is implemented ?

Is it actually using Setjump() & Longjump() concepts as in build?

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The standard does not define how exceptions have to be implemented by the compiler vendors. The two main strategies are to keep track of catch locations in a table or to unwind the stack frames until a suitable catch site is found.

MSVC for example uses SEH (Structured Exception Handlers) to implement C++ exceptions, while GCC uses a pure address table approach. Other compilers still, may use stack unwinding if they preserve enough frame information.

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You should check Section 15.1 Throwing an exception of the standard.