Re: [AOLSERVER] Aolserver Progress - Some few examples.... - Errata Corrige
Hello all I did some tests on Windows 32. Tcl_Finalize prevents the proper stopping of the service also on Windows 32. So the proper mod was and still is: // Conditional compilation clause added by M. Martignano on the 05/08/2011 #ifndef _WIN32 Tcl_Finalize(); #endif Tcl_Finalize doesn't work also on the 32 bit code. Ciao, Maurizio Dear Dossy, Your proposal of your wrapper sounds good to me. Why do not we insert that in the codebase? Till we understand better the issue? Next week I am going to redo some testing also in Win32 and I will let you know.. Thank you very much, Maurizio From: AOLserver Discussion [mailto:AOLSERVER@LISTSERV.AOL.COM] On Behalf Of Dossy Shiobara Sent: 06 August 2011 17:39 To: AOLSERVER@LISTSERV.AOL.COM Subject: Re: [AOLSERVER] Aolserver Progress - Some few examples Could you build AOLserver with debugging symbols and run nsd.exe under a debugger, with Tcl_Finalize *NOT* commented out/removed (i.e., as it currently is in CVS HEAD) and confirm where this 0x4015 exception is actually happening? Not calling Tcl_Finalize at process exit means any callbacks registered with Tcl_CreateExitHandler will not fire. It is absolutely wrong to not call Tcl_Finalize for this reason. If this is causing a problem on Win64 at the moment, as a temporary measure, you could wrap the call to Tcl_Finalize with the appropriate #ifndef: #if !defined(_WIN64) Tcl_Finalize(); #endif // !_WIN64 But, on all other platforms where invoking Tcl_Finalize does work, it should absolutely be done. On 8/6/11 9:35 AM, Maurizio Martignano wrote: Dear Gustav (and all the others) I did some digging. And here are the results.. 1. Tcl_Finalize gets properly called in Windows 64 by tclsh (ok tlcsh85t.exe) at exit time 2. From within Aolserver it doesn't even get actually called, but at the act of calling an exception is generated inside the C/C++ runtime: Faulting application name: nsd.exe, version: 0.0.0.0, time stamp: 0x4e3d1e32 Faulting module name: MSVCR100.dll, version: 10.0.30319.415, time stamp: 0x4d26d15a Exception code: 0x4015 Fault offset: 0x00075fe9 Faulting process id: 0x1114 Faulting application start time: 0x01cc542b82cdba6b Faulting application path: C:\aolserver\bin\nsd.exe Faulting module path: C:\Windows\system32\MSVCR100.dll Report Id: e90de38e-c01e-11e0-9d90-cef6f702c08b 3. Looking at the code in TCL I believe (and here I repeat I BELIEVE) the problem is in the TCL DLL initialization code: tclWin32Dll.c case DLL_PROCESS_DETACH: /* * Protect the call to Tcl_Finalize. The OS could be unloading us from * an exception handler and the state of the stack might be unstable. */ if defined(HAVE_NO_SEH) !defined(_WIN64) __asm__ __volatile__ ( /* * Construct an EXCEPTION_REGISTRATION to protect the call to * Tcl_Finalize */ leal %[registration], %%edx \n\t movl %%fs:0, %%eax\n\t movl %%eax,0x0(%%edx) \n\t /* link */ leal 1f, %%eax\n\t movl %%eax,0x4(%%edx) \n\t /* handler */ movl %%ebp,0x8(%%edx) \n\t /* ebp */ movl %%esp,0xc(%%edx) \n\t /* esp */ movl %[error], 0x10(%%edx) \n\t /* status */ /* * Link the EXCEPTION_REGISTRATION on the chain */ movl %%edx,%%fs:0 \n\t /* * Call Tcl_Finalize */ call _Tcl_Finalize\n\t /* * Come here on a normal exit. Recover the EXCEPTION_REGISTRATION * and store a TCL_OK status */ movl %%fs:0, %%edx\n\t movl %[ok],%%eax\n\t movl %%eax,0x10(%%edx) \n\t jmp2f \n /* * Come here on an exception. Get the EXCEPTION_REGISTRATION that * we previously put on the chain. */ 1:\t movl %%fs:0, %%edx\n\t movl 0x8(%%edx), %%edx\n /* * Come here however we exited. Restore context from the * EXCEPTION_REGISTRATION in case the stack is unbalanced. */ 2:\t movl 0xc(%%edx), %%esp\n\t movl 0x8(%%edx), %%ebp\n\t movl 0x0(%%edx), %%eax\n\t movl %%eax,%%fs:0 \n\t : /* No outputs */ : [registration] m (registration), [ok] i (TCL_OK), [error] i (TCL_ERROR) : %eax, %ebx, %ecx, %edx, %esi, %edi, memory ); #else
Re: [AOLSERVER] Aolserver Progress - Some few examples.... - Errata Corrige
I vaguely remember never figuring this out either and deciding to ifdef it out. In practice it doesn't do much -- I've never come across a on-exit handler that really needed fire. Curious if anyone has. Jim Sent from a phone On Aug 6, 2011, at 3:29 PM, Maurizio Martignano maurizio.martign...@spazioit.com wrote: Hello all I did some tests on Windows 32. Tcl_Finalize prevents the proper stopping of the service also on Windows 32. So the proper mod was and still is: // Conditional compilation clause added by M. Martignano on the 05/08/2011 #ifndef _WIN32 Tcl_Finalize(); #endif Tcl_Finalize doesn’t work also on the 32 bit code. Ciao, Maurizio Dear Dossy, Your proposal of your wrapper sounds good to me. Why do not we insert that in the codebase? Till we understand better the issue? Next week I am going to redo some testing also in Win32 and I will let you know…. Thank you very much, Maurizio From: AOLserver Discussion [mailto:AOLSERVER@LISTSERV.AOL.COM] On Behalf Of Dossy Shiobara Sent: 06 August 2011 17:39 To: AOLSERVER@LISTSERV.AOL.COM Subject: Re: [AOLSERVER] Aolserver Progress - Some few examples Could you build AOLserver with debugging symbols and run nsd.exe under a debugger, with Tcl_Finalize *NOT* commented out/removed (i.e., as it currently is in CVS HEAD) and confirm where this 0x4015 exception is actually happening? Not calling Tcl_Finalize at process exit means any callbacks registered with Tcl_CreateExitHandler will not fire. It is absolutely wrong to not call Tcl_Finalize for this reason. If this is causing a problem on Win64 at the moment, as a temporary measure, you could wrap the call to Tcl_Finalize with the appropriate #ifndef: #if !defined(_WIN64) Tcl_Finalize(); #endif // !_WIN64 But, on all other platforms where invoking Tcl_Finalize does work, it should absolutely be done. On 8/6/11 9:35 AM, Maurizio Martignano wrote: Dear Gustav (and all the others) I did some digging… And here are the results…. 1. Tcl_Finalize gets properly called in Windows 64 by tclsh (ok tlcsh85t.exe) at exit time 2. From within Aolserver it doesn’t even get actually called, but at the act of calling an exception is generated inside the C/C++ runtime: Faulting application name: nsd.exe, version: 0.0.0.0, time stamp: 0x4e3d1e32 Faulting module name: MSVCR100.dll, version: 10.0.30319.415, time stamp: 0x4d26d15a Exception code: 0x4015 Fault offset: 0x00075fe9 Faulting process id: 0x1114 Faulting application start time: 0x01cc542b82cdba6b Faulting application path: C:\aolserver\bin\nsd.exe Faulting module path: C:\Windows\system32\MSVCR100.dll Report Id: e90de38e-c01e-11e0-9d90-cef6f702c08b 3. Looking at the code in TCL I believe (and here I repeat I BELIEVE) the problem is in the TCL DLL initialization code: tclWin32Dll.c case DLL_PROCESS_DETACH: /* * Protect the call to Tcl_Finalize. The OS could be unloading us from * an exception handler and the state of the stack might be unstable. */ if defined(HAVE_NO_SEH) !defined(_WIN64) __asm__ __volatile__ ( /* * Construct an EXCEPTION_REGISTRATION to protect the call to * Tcl_Finalize */ leal %[registration], %%edx \n\t movl %%fs:0, %%eax\n\t movl %%eax,0x0(%%edx) \n\t /* link */ leal 1f, %%eax\n\t movl %%eax,0x4(%%edx) \n\t /* handler */ movl %%ebp,0x8(%%edx) \n\t /* ebp */ movl %%esp,0xc(%%edx) \n\t /* esp */ movl %[error], 0x10(%%edx) \n\t /* status */ /* * Link the EXCEPTION_REGISTRATION on the chain */ movl %%edx,%%fs:0 \n\t /* * Call Tcl_Finalize */ call _Tcl_Finalize\n\t /* * Come here on a normal exit. Recover the EXCEPTION_REGISTRATION * and store a TCL_OK status */ movl %%fs:0, %%edx\n\t movl %[ok],%%eax\n\t movl %%eax,0x10(%%edx) \n\t jmp2f \n /* * Come here on an exception. Get the EXCEPTION_REGISTRATION that * we previously put on the chain. */ 1:\t movl %%fs:0, %%edx\n\t movl 0x8(%%edx), %%edx\n /* * Come here however we exited. Restore context
