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ircd::ctx: Assert no yielding during exception handling due to ABI limitations.

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This commit is contained in:
Jason Volk 2018-03-24 15:53:15 -07:00
parent 1e99077169
commit 7dbfb061e9
1 changed files with 8 additions and 0 deletions
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8
ircd/ctx.cc
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@ -518,6 +518,14 @@ ircd::ctx::continuation::continuation(ctx *const &self)
assert(!critical_asserted);
assert(self != nullptr);
assert(self->notes <= 1);
// GNU cxxabi uses a singly-linked forward list (aka the 'exception
// stack') for pending exception activities. Due to this limitation we
// cannot interleave _cxa_begin_catch() and __cxa_end_catch() by yielding
// the ircd::ctx in an exception handler.
assert(!std::uncaught_exceptions());
assert(!std::current_exception());
self->cont = this;
ircd::ctx::current = nullptr;
}