[RFC] print stack trace after each syscall

[Masatake YAMATO]

> On Tue, Jun 25, 2013 at 7:08 AM, Masatake YAMATO <yamato at redhat.com> wrote:
>> Hi,
>>
>> I need following patch to avoid strace+ coredump.
>> Could you merge it the official source tree?
>>
>>
>> Signed-off-by: Masatake YAMATO <yamato at redhat.com>
>>
>> diff --git a/syscall.c b/syscall.c
>> index a569a65..1b8f613 100644
>> --- a/syscall.c
>> +++ b/syscall.c
>> @@ -2923,7 +2923,7 @@ print_normalized_addr(struct tcb* tcp, unsigned long addr) {
>>         // since tcp->mmap_cache is sorted, do a binary search to find the cache entry
>>         // that contains addr
>>         int lower = 0;
>> -       int upper = tcp->mmap_cache_size;
>> +       int upper = tcp->mmap_cache_size - 1;
>>
>>         while (lower <= upper) {
>>                 int mid = (int)((upper + lower) / 2);
>>
> 
> Hey Masatake,
> thanks for the fix! Ill include it.

Thanks. 
 
> Is there a specific program that can trigger this consistently?

Sorry, I cannot rememeber the program. I found this bug when I built strace+
without libunwind. So this bug will never hit strace with your
patch.
 
> Luca

Masatake YAMATO