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modified post 14ab99 by Anonymous on Wed 1st Sep 2021 15:25
original post 881c3 by Anonymous on Wed 1st Sep 2021 14:15
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/*

1	1		/*
2	2		* gdb_catch_c++_throw2.cpp demo
3	3		*
4	4		* Use like this:
5	5		* $ g++ -std=c++11 -g gdb_catch_c++_throw1.cpp
6	6		*
7		-	* Inferior 1 [process 21238] will be killed.
8	7		*/
9	8		#include <stdexcept>
10	9		#include <iostream>
11	10		#include <stdlib.h>
12	11		#include <stdio.h>
13	12		#include <unistd.h>
14	13		#include <execinfo.h>
15	14
16	15		class myclass
17	16		{
18	17		public:
19	18		int death_is_coming = 10;
20	19
21	20		/* recursive call to make stack trace bigger */
22	21		void countdown_to_death()
23	22		{
24	23		if (this->death_is_coming-- > 0)
25	24		this->countdown_to_death();
26	25		this->print_and_throw();
27	26		}
28	27		void print_and_throw()
29	28		{
30	29		std::cout << "#mark 1" << std::endl;
31	30		throw std::exception(); /* gdb should catch this */
32	31		}
33	32		};
34	33
35	34		/*
36	35		* std::exception will call std::terminate() to terminate the process.
37	36		* NO C++ CODE is allowed at this point, use plain ISO C and ISO C
38	37		* I/O only!!
39	38		*/
40	39		void std::terminate()
41	40		{
42	41		#define MAX_SIZE (1024)
43	42		size_t size;
44	43		void *array[MAX_SIZE];
45	44		size = backtrace(array, MAX_SIZE);
46	45		backtrace_symbols_fd(array, size, STDERR_FILENO);
47	46		exit(EXIT_FAILURE);
48	47		}
49	48
50	49		int main(int ac, char **av)
51	50		{
52	51		myclass x;
53	52		x.countdown_to_death();
54	53
55	54		return EXIT_SUCCESS;
56	55		}
57	56