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ircd::ctx: Belay marking entry point until after initial interrupt check.

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This commit is contained in:
Jason Volk 2020-10-08 17:54:01 -07:00
parent bfe864663c
commit d1c2e0baeb
1 changed files with 11 additions and 2 deletions
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13
ircd/ctx.cc
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@ -150,10 +150,8 @@ noexcept try
this->yc = &yc;
notes = 1;
stack.base = uintptr_t(__builtin_frame_address(0));
mark(prof::event::ENTER);
const unwind atexit{[this]
{
mark(prof::event::LEAVE);
adjoindre.notify_all();
stack.at = 0;
notes = 0;
@ -166,6 +164,17 @@ noexcept try
// Check for a precocious interrupt
interruption_point();
// Mark the point of context entry only after the interrupt check. If the
// context was interrupted without ever entering (which makes the above
// check throw) we never record any execution slice or increment the epoch
// counter for it. This can allow a parent context to assume application
// state remains unmodified by the aborted context.
mark(prof::event::ENTER);
const unwind leaver{[this]
{
mark(prof::event::LEAVE);
}};
// Call the user's function.
func();