[AV] Re-destruction of the rem_port object
------------------------------------------
Key: CORE-6224
URL: http://tracker.firebirdsql.org/browse/CORE-6224
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.5
Environment: Test of IBProvider builtin client for Firebird.
Reporter: Kovalenko Dmitry
FB3.0.5.33225 x64 SuperServer.
Connection through TCP/IP.
-------
Under mt-tesing of IBProvider builtin client for Firebird, Firebird crash on
the destroy of rem_port object.
This is a reproducible problem on the "clear" build of server.
Run parameters [for history]
target\vs2019-x64-Debug\test_db_client_fb_1.exe /thread_count 10 /auto
/log_dir _logs /log_file_prefix fb03-0-4 /inet_host HOME4 /db
d:\database\ram\ibp_test_fb30_d3.gdb /db_user GAMER /db_password vermut
/new_db_dir d:\database\ram\ /isc_api_library fbclient_30.dll /cn_str
"remote:protocol_arch=symmetric,generic;remote:wire_compression=required" /dbms
"FB-3" /test RemoteFB.WORK.019.StmtExecute.*
-------- [The "best" case of crash]
I made some changes in FB sources for better undertand of problem.
CRASH THREAD [ID 31192 - not sure at current time]
virtual int release() const
{
fb_assert(m_refCnt.value() > 0); //<- HERE
STACK:
firebird.exe!fb_assert_impl(const char * msg, const char * file, int
line, bool do_abort)Строка 48 C++
> firebird.exe!Firebird::RefCounted::release()Строка 45 C++
firebird.exe!rem_port::release()Строка 1162 C++
firebird.exe!Firebird::RefPtr<rem_port>::assign(rem_port * const
p)Строка 276 C++
firebird.exe!Firebird::RefPtr<rem_port>::operator=(rem_port * p)Строка
182 C++
firebird.exe!server_req_t::~server_req_t()Строка 130 C++
firebird.exe!server_req_t::`scalar deleting destructor'(unsigned int)
C++
firebird.exe!loopThread(void * __formal)Строка 6180 C++
firebird.exe!`anonymous namespace'::ThreadArgs::run()Строка 78 C++
firebird.exe!threadStart(void * arg)Строка 97 C++
ucrtbased.dll!thread_start<unsigned int (__cdecl*)(void *),1>(void *
const parameter)Строка 97 C++
kernel32.dll!BaseThreadInitThunk() Нет данных
ntdll.dll!RtlUserThreadStart() Нет данных
LOCAL VARIABLES:
- this 0x00000000008ca1d0 {m_refCnt={...}
m_debug__WAS_DELETED=-572662307 } const Firebird::RefCounted *
+ __vfptr 0xdddddddddddddddd {???, ???, ???} void * *
- m_refCnt {...} Firebird::AtomicCounter
+ Firebird::PlatformAtomicCounter {counter=-2459565876494606883 }
Firebird::PlatformAtomicCounter
m_debug__WAS_DELETED -572662307 long
refCnt -858993460 const int
NOTE ON THE this - is is 0x00000000008ca1d0
------ TRACE INFORMATION, WHICH WAS CREATED __BEFORE__ CRASH:
It is dirrect call of rem_port::release from "static void disconnect(rem_port*
const port)" (inet.cpp). Decrement from 2 to 1.
REM_PORT_RLS - 0x00000000008ca1d0. TID: 31192. R: 1. STACK:
firebird.exe!rem_port::release
firebird.exe!disconnect
firebird.exe!rem_port::disconnect
firebird.exe!rem_port::disconnect
firebird.exe!process_packet
firebird.exe!loopThread
firebird.exe!`anonymous namespace'::ThreadArgs::run
firebird.exe!threadStart
ucrtbased.dll!thread_start<unsigned int (__cdecl*)(void *),1>
kernel32.dll!BaseThreadInitThunk
ntdll.dll!RtlUserThreadStart
It is destroy of rem_port object. Decrement from 1 to 0.
REM_PORT_DCR - 0x00000000008ca1d0. TID: 31192. STACK:
firebird.exe!rem_port::~rem_port
firebird.exe!rem_port::`scalar deleting destructor'
firebird.exe!Firebird::RefCounted::release
firebird.exe!rem_port::release
firebird.exe!Firebird::RefPtr<rem_port>::~RefPtr<rem_port>
firebird.exe!DecrementRequestsQueued::~DecrementRequestsQueued
firebird.exe!process_packet
firebird.exe!loopThread
firebird.exe!`anonymous namespace'::ThreadArgs::run
firebird.exe!threadStart
ucrtbased.dll!thread_start<unsigned int (__cdecl*)(void *),1>
kernel32.dll!BaseThreadInitThunk
ntdll.dll!RtlUserThreadStart
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