[LLVMdev] Calling dispatch_async() within call to ExecutionEngine::runFunction()
rmann at latencyzero.com
Wed Jan 30 00:57:04 PST 2013
On Jan 30, 2013, at 0:43 , David Chisnall <David.Chisnall at cl.cam.ac.uk> wrote:
> I have used libdispatch (on FreeBSD) from JIT'd code without any issues, so I think your bug is elsewhere.
That's good to know, thanks. Puzzling, though. If I call the callbacks directly, everything executes as you would expect (the stack grows to the last callback, then unwinds, and runFunction() returns.
But the dispatch_async() block is never called at all. I don't know what can cause this.
NSLog(@"decodeField(%p, %p, %p, 0x%llX)", this, inPacket, inCompletionProc, (uint64_t) inContext);
NSLog(@"Field name: %s", mFieldName);
NSLog(@"queue: %s", dispatch_queue_get_label(dispatch_get_current_queue()));
NSLog(@"comp: %p", inPacket->mCompletionProc);
2013-01-29 23:40:25.456 otest[66325:303] decodeField(0x106b09d20, 0x106b09d00, 0x106c90010, 0x0)
2013-01-29 23:40:25.456 otest[66325:303] Field name: packetMarker
2013-01-29 23:40:25.457 otest[66325:303] queue: com.apple.main-thread
Breakpoints set before dispatch and on first line inside the block, never stops at the inside one.
More information about the llvm-dev