id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
9912	shared_ptr SEGV in Android debug builds	ian@…	Peter Dimov	"Hi,

I get a SEGV in the shared_ptr ref counting code on Android debug builds. Release builds do not have this problem.

Instructions:
1. Install ndk (I used r9d 64-bit mac)
1. Ensure ndk-build is on your path
1. Download the attached sample program
1. Run build.sh
1. Install the executable on an Android device (I used a Nexus 7).


As provided, you should get a SEGV in the sp_counted_base code.

There are two ways to fix this:
1. Remove APP_OPTIM=debug from build.sh
1. Enable # LOCAL_CPPFLAGS := -DBOOST_SP_USE_PTHREADS in Android.mk

Notes:

Android debug builds disable the -mthumb option and instead use -marm. Ultimately this affects spinlock.hpp
{{{
#elif defined(__GNUC__) && defined( __arm__ ) && !defined( __thumb__ )
#  include <boost/smart_ptr/detail/spinlock_gcc_arm.hpp>
 
//code omitted
 
#elif defined(BOOST_HAS_PTHREADS)
#  include <boost/smart_ptr/detail/spinlock_pt.hpp>
}}}
So release builds use spinlock_pt.hpp and debug builds use spinlock_gcc_arm.hpp"	Bugs	new	To Be Determined	smart_ptr	Boost 1.55.0	Problem			Andrey.Semashev@…