Bug #96

Ctrl-C while cat'ing a large file results in breakpoint

Added by Alex Smith over 2 years ago. Updated about 1 year ago.

Status:Closed Start:11/14/2009
Priority:High Due date:
Assigned to:Matthew Iselin % Done:

0%
Category:- Spent time: -
Target version:-

Description

Doesn't happen every time, appears to happen if its sleeping on the ATA request queue. Log reads:

(NN) [37] execve("/applications/cat")
(NN) [37] {cat i686-pedigree-g++ }
(NN) MemoryMappedFile: 0x350000 -> 0x366000 (pid 0x25)
(NN) Elf::createNeededOnly: buffer at 0x350000, len 0x15234
(NN) MemoryMappedFile: 0x367000 -> 0x485000 (pid 0x25)
(NN) Elf::createNeededOnly: buffer at 0x367000, len 0x11d464
(NN) MemoryMappedFile: 0x101000 -> 0x117000 (pid 0x25)
(NN) Elf::create: buffer at 0x101000, len 0x15234
(NN) MemoryMappedFile: 0x118000 -> 0x236000 (pid 0x25)
(NN) Elf::create: buffer at 0x118000, len 0x11d464
(NN) [37] init_pthreads
(NN) [37] sysconf(8)
(NN) [37] exit(2)
(NN) Sending unexpected exit event to thread
(NN) Kill: 0x25 (parent: 0x4)
(FF) Should never get here
(FF) Should never get here << Flushing log content >>
(WW) Dwarf backtracing not available.

Backtrace is FileDisk::read -> File::read -> Iso9660File::readBlock -> AtaDisk::read -> RequestQueue::addRequest -> Semaphore::acquire -> PerProcessorScheduler::checkEventState -> posix_exit -> PosixSubsystem::exit -> Process::kill

History

Updated by Matthew Iselin over 2 years ago

  • Status changed from New to Assigned
  • Assigned to set to Matthew Iselin

I'll have a look and see what I can do.

Updated by Matthew Iselin over 2 years ago

This is an extremely hard to reproduce situation where the event is executed literally just as the RequestQueue is being modified. I've done a little bit of work to get towards a fix, but as it's hard to reproduce, it is very difficult to be certain that this is actually fixed.

Updated by Matthew Iselin about 1 year ago

  • Status changed from Assigned to Closed

ZombieQueue seems to have solved much of this problem. Closed, any repeat of this problem should be put into a new issue.

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