cat-exception.cpp

#include <cstdio>
#include <cstdlib>
#include <execinfo.h>
#include <iostream>
#include <stdexcept>
#include <unistd.h>

void exhnd() {
	fprintf(stderr, __FILE__ ": Custom exception handler invoked in pid %d\n", getpid());
	void *trace_elems[20];
	int trace_elem_count(backtrace(trace_elems, 20));
	char **stack_syms(backtrace_symbols(trace_elems, trace_elem_count));
	for (int i = 0; i < trace_elem_count; ++i)  {
		std::cout << stack_syms[i] << "\n";
	}
	free(stack_syms);
	exit(1);
}

extern "C" {
	static void con() __attribute__((constructor));
	void con() {
		std::set_terminate(exhnd);
		fprintf(stderr, __FILE__ ": Custom exception handler installed in pid %d\n", getpid());
	}
}

/*

The problem:
terminate called after throwing an instance of 'std::system_error'
  what():  Resource temporarily unavailable

The solution:
Compile with: c++ -shared -o cat.so -fPIC cat-exception.cpp (or similar)
Before running the target: export LD_PRELOAD="$(realpath cat.so)"

*/