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Use a custom nogc_assert in cleanup code.

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Unfortunately the built-in assert GC allocates an exception, which means that if called directly or indirectly form a finalizer, the assertion will not become visible and instead an InvalidMemoryOperationError is thrown.

This implements a custom nogc_assert() function that directly prints the assertion message and uses abort() to end the process.
This commit is contained in:
Sönke Ludwig 2018-03-11 12:08:09 +01:00
parent acc35e1107
commit df78af96bb
9 changed files with 45 additions and 17 deletions
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9
source/eventcore/drivers/posix/events.d
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@ -4,6 +4,7 @@ module eventcore.drivers.posix.events;
import eventcore.driver;
import eventcore.drivers.posix.driver;
import eventcore.internal.consumablequeue : ConsumableQueue;
import eventcore.internal.utils : nogc_assert;
version (linux) {
nothrow @nogc extern (C) int eventfd(uint initval, int flags);
@ -199,13 +200,13 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop, Sockets : EventDriverS
final override bool releaseRef(EventID descriptor)
{
assert(getRC(descriptor) > 0, "Releasing reference to unreferenced event FD.");
nogc_assert(getRC(descriptor) > 0, "Releasing reference to unreferenced event FD.");
if (--getRC(descriptor) == 0) {
if (!isInternal(descriptor))
m_loop.m_waiterCount -= getSlot(descriptor).waiters.length;
() @trusted nothrow {
try .destroy(getSlot(descriptor).waiters);
catch (Exception e) assert(false, e.msg);
catch (Exception e) nogc_assert(false, e.msg);
} ();
version (linux) {
m_loop.unregisterFD(descriptor, EventMask.read);
@ -216,7 +217,7 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop, Sockets : EventDriverS
try {
synchronized (m_eventsMutex)
m_events.remove(rs);
} catch (Exception e) assert(false, e.msg);
} catch (Exception e) nogc_assert(false, e.msg);
}
m_loop.clearFD(descriptor);
version (Posix) close(cast(int)descriptor);
@ -228,7 +229,7 @@ final class PosixEventDriverEvents(Loop : PosixEventLoop, Sockets : EventDriverS
private EventSlot* getSlot(EventID id)
{
assert(id < m_loop.m_fds.length, "Invalid event ID.");
nogc_assert(id < m_loop.m_fds.length, "Invalid event ID.");
return () @trusted { return &m_loop.m_fds[id].event(); } ();
}