Testcase for emscripten issue 131

testcase.cpp

#include <stdio.h>

typedef void genf(void);

union cpuinfo
{
	long long i;
	void * p;
	genf * f;
	char * s;
	genf * setinfo;
	genf * init;
	genf * reset;
	genf * exit;
	genf * execute;
	genf * burn;
	genf * translate;
	genf * read;
	genf * write;
	genf * readop;
	genf * debug_init;
	genf * disassemble;
	genf * import_state;
	genf * export_state;
	genf * import_string;
	genf * export_string;
	int * icount;
	genf * internal_map8;
	genf * internal_map16;
	genf * internal_map32;
	genf * internal_map64;
	genf * default_map8;
	genf * default_map16;
	genf * default_map32;
	genf * default_map64;
};

class legacy_cpu_device;

typedef void (*cpu_get_info_func)(legacy_cpu_device *device, unsigned int state, cpuinfo *info);

void cpu_get_info_z80(legacy_cpu_device *device, unsigned int state, cpuinfo *info)
{
	info->i = 132;
}

class legacy_cpu_device {
public:
	legacy_cpu_device();
protected:
	cpu_get_info_func m_get_info;
	long long get_legacy_int(unsigned int state) const;
};

legacy_cpu_device::legacy_cpu_device()
{
	m_get_info = &cpu_get_info_z80;
	int tokenbytes = get_legacy_int(0x04000);
        printf("tokenbytes is %i\n", tokenbytes);
	//if (tokenbytes == 0)
	//	throw emu_fatalerror("Device %s specifies a 0 context size!\n", tag);
}

long long legacy_cpu_device::get_legacy_int(unsigned int state) const
{
	union cpuinfo info = { 0 };
	printf("doing get_legacy_int for state %u\n",state);
	(*m_get_info)(const_cast<legacy_cpu_device *>(this), state, &info);
        printf("info.i is now %lld\n", info.i);
	return info.i;
}

int main() {
	legacy_cpu_device *bar = new legacy_cpu_device;
}