Hi Cyril: On 10/06/2011 08:44 AM, Wanlong Gao wrote:
> On 10/05/2011 11:36 PM, Cyril Hrubis wrote: > >> Hi! >>> If read_mem() goes before *map_address* has been mapped, dereference >>> to the *map_address*(nul) will cause the Segment Fault. >>> >>> So, let read_mem() yield the CPU when *map_address* hasn't been mapped. >>> >> >> I've been reading the test sourece lately and IMHO this is wanted >> behavior. As far as I understand the code the test creates two threads >> one to read and one to map/unmap the memory concurently. Look for the >> setjmp() and longjmp() in the read_mem() and signal handler that is >> expected to do exactly what you are trying to achieve. So if the test >> fails with segmentation fault, there is something wrong with the >> signal/longjmp handling. >> > > > Sure, but I saw that when read_mem() goes first and become the first running > thread, it should cause segment fault all the time now. > > So, if the first running thread is not read_mem(), it will not fail with > segment > fault all the time. So, I think there's no wrong with the signal or others' > handling. > > We just make sure that read_mem() is not the first running thread, it will be > enough. Any comment ? Thanks > > Thanks > -Wanlong Gao > > ------------------------------------------------------------------------------ > All the data continuously generated in your IT infrastructure contains a > definitive record of customers, application performance, security > threats, fraudulent activity and more. Splunk takes this data and makes > sense of it. Business sense. IT sense. Common sense. > http://p.sf.net/sfu/splunk-d2dcopy1 > _______________________________________________ > Ltp-list mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/ltp-list > ------------------------------------------------------------------------------ All the data continuously generated in your IT infrastructure contains a definitive record of customers, application performance, security threats, fraudulent activity and more. Splunk takes this data and makes sense of it. Business sense. IT sense. Common sense. http://p.sf.net/sfu/splunk-d2dcopy1 _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list
