[lldb-dev] segmentation fault occurs when pthread_mutex_lock tries to lock a mutex

[Enrico Granata]

Is it me or 0x10 is not a valid address?
At a glance, you get that kind of address when you are dereferencing an iVar of a zeroed-out pointer, and 16 would be the offset of the mutex from the base of the class.
You might want to check along the stack if you are accessing a NULL object without checking first.

Sent from the iPhone of
Enrico Granata <egranata@🍎.com>

> On Dec 31, 2013, at 3:44 AM, 杨勇勇 <triple.yang at gmail.com> wrote:
> 
> Hi, all.
> 
> I am porting lldb for a VLIW target with host env gcc-4.8.2/redhat enterprise linux 6.2.
> This problem happens in member function lldb_private::Unwind::GetFrameInfoAtIndex() when it tries to lock member "m_unwind_mutex" whose runtime address is 0x10 (checked via GDB).
> 
> I am not familiar with mutex errors, does anyone have clues?
> Thanks in advance!
> 
> -- 
> 杨勇勇 (Yang Yong-Yong)
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