Function addr2line

src/core/debug/callstack_linux.cpp:30–54

	static pid_t demangler;

	static const char *addr2line(char *line, int len, const char *addr)
	{
		char process_exe[256];
		stbsp_snprintf(process_exe, sizeof(process_exe), "/proc/%u/exe", getpid());

		const char *argv[] =
		{
			"addr2line",
			"-s",
			"-e",
			process_exe,
			addr,
			NULL
		};

		Process pr;
		if (pr.spawn(argv, CROWN_PROCESS_STDOUT_PIPE | CROWN_PROCESS_STDERR_MERGE) == 0) {
			u32 num_read;
			pr.read(&num_read, line, len);
			line[num_read - 1] = '\0';
			pr.wait();
			return line;
		}
		return "<addr2line missing>";
	}

	static int demangler_main()
	{