[shared_ptr] make_shared causes Access Violation
I have a Visual Studio 2008 C++ application for ARMV4I Windows Mobile 6 where I'm using `boost::shared_ptr<>` to manage a fairly large object (4KB). Unfortunately, `boost::make_shared<>` causes an Access Violation exception. I am using Boost 1.45.0 with STLPort 5.2.1. My code: struct Foo { char a[ 4 * 1024 - 1 ]; }; int _tmain( int argc, _TCHAR* argv[] ) { boost::shared_ptr< Foo > f = boost::make_shared< Foo >(); // Access Violation return 0; } The exception callstack: test.exe!boost::detail::sp_ms_deleter<o>::sp_ms_deleter<o>(void) Line: 60, Byte Offsets: 0x18 C++ test.exe!boost::make_shared<o>(void) Line: 106, Byte Offsets: 0x5c C++ test.exe!wmain(int argc = 1, wchar_t** argv = 0x01b40060) Line: 81, Byte Offsets: 0x18 C++ test.exe!mainWCRTStartup(HINSTANCE__* hInstance = 0x00000003, HINSTANCE__* hInstancePrev = 0x00000000, unsigned short* lpszCmdLine = 0x00000003, int nCmdShow = 0) Line: 188, Byte Offsets: 0x94 C++ The location of the exception (boost\smart_ptr\make_shared.hpp): template< class T > class sp_ms_deleter { /* snip! */ public: sp_ms_deleter(): initialized_( false ) { // line: 60 this = NULL } /* snip! */ This issue does not occur when compiling for x86 Windows. This issue also does not occur when using the shared_ptr like this: boost::shared_ptr< Foo > f1 = boost::shared_ptr< Foo >( new Foo ); Can anybody explain what's going on and why this is breaking only on ARMV4I Windows Mobile 6? Thanks, PaulH
2011/5/10 Paul Heil
I have a Visual Studio 2008 C++ application for ARMV4I Windows Mobile 6 where I'm using `boost::shared_ptr<>` to manage a fairly large object (4KB). Unfortunately, `boost::make_shared<>` causes an Access Violation exception. I am using Boost 1.45.0 with STLPort 5.2.1.
My code:
struct Foo { char a[ 4 * 1024 - 1 ]; };
int _tmain( int argc, _TCHAR* argv[] ) { boost::shared_ptr< Foo > f = boost::make_shared< Foo >(); // Access Violation return 0; }
The exception callstack:
test.exe!boost::detail::sp_ms_deleter<o>::sp_ms_deleter<o>(void) Line: 60, Byte Offsets: 0x18 C++ test.exe!boost::make_shared<o>(void) Line: 106, Byte Offsets: 0x5c C++ test.exe!wmain(int argc = 1, wchar_t** argv = 0x01b40060) Line: 81, Byte Offsets: 0x18 C++ test.exe!mainWCRTStartup(HINSTANCE__* hInstance = 0x00000003, HINSTANCE__* hInstancePrev = 0x00000000, unsigned short* lpszCmdLine = 0x00000003, int nCmdShow = 0) Line: 188, Byte Offsets: 0x94 C++
The location of the exception (boost\smart_ptr\make_shared.hpp):
template< class T > class sp_ms_deleter { /* snip! */ public: sp_ms_deleter(): initialized_( false ) { // line: 60 this = NULL }
/* snip! */
This issue does not occur when compiling for x86 Windows. This issue also does not occur when using the shared_ptr like this:
boost::shared_ptr< Foo > f1 = boost::shared_ptr< Foo >( new Foo );
Can anybody explain what's going on and why this is breaking only on ARMV4I Windows Mobile 6?
Thanks, PaulH
My guess: stack overflow. If I remember correctly, 2 times sizeof( Foo ) must fit on the stack when using make_shared. Regards, Kris
I can declare two instances of Foo with no error: int _tmain( int argc, _TCHAR* argv[] ) { Foo a; Foo b; return 0; } The linker options I'm using are /STACK 65536,4096. So, the stack should be capable of handling 16 times sizeof( Foo ). -PaulH On Tue, May 10, 2011 at 3:17 PM, Krzysztof Czainski <1czajnik@gmail.com>wrote:
2011/5/10 Paul Heil
I have a Visual Studio 2008 C++ application for ARMV4I Windows Mobile 6 where I'm using `boost::shared_ptr<>` to manage a fairly large object (4KB). Unfortunately, `boost::make_shared<>` causes an Access Violation exception. I am using Boost 1.45.0 with STLPort 5.2.1.
My code:
struct Foo { char a[ 4 * 1024 - 1 ]; };
int _tmain( int argc, _TCHAR* argv[] ) { boost::shared_ptr< Foo > f = boost::make_shared< Foo >(); // Access Violation return 0; }
The exception callstack:
test.exe!boost::detail::sp_ms_deleter<o>::sp_ms_deleter<o>(void) Line: 60, Byte Offsets: 0x18 C++ test.exe!boost::make_shared<o>(void) Line: 106, Byte Offsets: 0x5c C++ test.exe!wmain(int argc = 1, wchar_t** argv = 0x01b40060) Line: 81, Byte Offsets: 0x18 C++ test.exe!mainWCRTStartup(HINSTANCE__* hInstance = 0x00000003, HINSTANCE__* hInstancePrev = 0x00000000, unsigned short* lpszCmdLine = 0x00000003, int nCmdShow = 0) Line: 188, Byte Offsets: 0x94 C++
The location of the exception (boost\smart_ptr\make_shared.hpp):
template< class T > class sp_ms_deleter { /* snip! */ public: sp_ms_deleter(): initialized_( false ) { // line: 60 this = NULL }
/* snip! */
This issue does not occur when compiling for x86 Windows. This issue also does not occur when using the shared_ptr like this:
boost::shared_ptr< Foo > f1 = boost::shared_ptr< Foo >( new Foo );
Can anybody explain what's going on and why this is breaking only on ARMV4I Windows Mobile 6?
Thanks, PaulH
My guess: stack overflow. If I remember correctly, 2 times sizeof( Foo ) must fit on the stack when using make_shared.
Regards, Kris
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Krzysztof Czainski wrote:
My guess: stack overflow. If I remember correctly, 2 times sizeof( Foo ) must fit on the stack when using make_shared.
Yes, this is ticket #4256: https://svn.boost.org/trac/boost/ticket/4256 It should be fixed in the latest version (1.46).
I have upgraded to boost 1.46.1. The issue remains the same.
-PaulH
On Tue, May 10, 2011 at 4:05 PM, Peter Dimov
Krzysztof Czainski wrote:
My guess: stack overflow. If I remember correctly, 2 times sizeof( Foo ) must fit on the stack when using make_shared.
Yes, this is ticket #4256:
https://svn.boost.org/trac/boost/ticket/4256
It should be fixed in the latest version (1.46). _______________________________________________ Boost-users mailing list Boost-users@lists.boost.org http://lists.boost.org/mailman/listinfo.cgi/boost-users
The callstack is the same with boost 1.46.1.
test.exe!boost::detail::sp_ms_deleter<o>::sp_ms_deleter<o>(void) Line:
60, Byte Offsets: 0x18 C++
test.exe!boost::make_shared<o>(void) Line: 106, Byte Offsets: 0x5c
C++
test.exe!wmain(int argc = 1, wchar_t** argv = 0x01b400b0) Line: 37, Byte
Offsets: 0x1c C++
test.exe!mainWCRTStartup(HINSTANCE__* hInstance = 0x002608d0,
HINSTANCE__* hInstancePrev = 0x00000000, unsigned short* lpszCmdLine =
0x002608d0, int nCmdShow = 0) Line: 188, Byte Offsets: 0x94 C++
On Tue, May 10, 2011 at 5:15 PM, Peter Dimov
Paul Heil wrote:
I have upgraded to boost 1.46.1. The issue remains the same.
Can you please post the new call stack?
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Paul Heil wrote:
The callstack is the same with boost 1.46.1.
Yes, you're right, sorry. The fix is not in 1.46.1 (released March 12th). It went in March 23rd and will be in the next release. Until then... I guess one option is to use the release branch from the SVN: https://svn.boost.org/svn/boost/branches/release or to copy only the following files from it: boost/smart_ptr/ detail/shared_count.hpp detail/sp_counted_impl.hpp make_shared.hpp
Yes, that fixes the issue. Thanks!
Is there an expected release date for the next update?
-PaulH
On Wed, May 11, 2011 at 9:08 AM, Peter Dimov
Paul Heil wrote:
The callstack is the same with boost 1.46.1.
Yes, you're right, sorry. The fix is not in 1.46.1 (released March 12th). It went in March 23rd and will be in the next release. Until then... I guess one option is to use the release branch from the SVN:
https://svn.boost.org/svn/boost/branches/release
or to copy only the following files from it:
boost/smart_ptr/ detail/shared_count.hpp detail/sp_counted_impl.hpp make_shared.hpp
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Krzysztof Czainski -
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Peter Dimov