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detect parent/clone loops rather than extending a string forever

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This commit is contained in:
Vas Crabb 2017-07-13 19:23:43 +10:00
parent f15068fccb
commit 553d973126
1 changed files with 5 additions and 0 deletions
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5
src/emu/driver.cpp
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@ -53,8 +53,13 @@ void driver_device::set_game_driver(const game_driver &game)
// and set the search path to include all parents
m_searchpath = game.name;
std::set<game_driver const *> seen;
for (int parent = driver_list::clone(game); parent != -1; parent = driver_list::clone(parent))
{
if (!seen.insert(&driver_list::driver(parent)).second)
throw emu_fatalerror("driver_device::set_game_driver(%s): parent/clone relationships form a loop", game.name);
m_searchpath.append(";").append(driver_list::driver(parent).name);
}
}