234:) interpreted by the system when an exception occurs. This means that the compiler does not have to generate extra code to manually perform stack unwinding and to call exception handlers appropriately. It merely has to emit information in the form of unwinding tables about the stack frame layout and specified exception handlers.
602:
Note that the examples given there do not work as-is on modern
Windows systems (post XP SP2) due to the changes Microsoft made to address the security issues present in the early SEH design. The examples still work on later versions of Windows if compiled with
274:. VEH does not replace Structured Exception Handling (SEH); rather, VEH and SEH coexist, with VEH handlers having priority over SEH handlers. Compared with SEH, VEH works more like kernel-delivered
708:
440:
657:
211:
error message. Then the list is traversed once more giving handlers a chance to clean up any resources used. Finally, the execution returns to
66:
Microsoft supports SEH as a programming technique at the compiler level only. MS Visual C++ compiler features three non-standard keywords:
585:
666:
541:
523:
36:
Microsoft
Structured Exception Handling is the native exception handling mechanism for Windows and a forerunner technology to
396:
138:
685:
636:
Covers the obscure details needed to get low-level SEH (and particularly SafeSEH) code to work on more modern
Windows.
484:
61:
690:
An article explaining why
Windows 7 SP1 ignores SafeSEH for some older binaries, while Windows XP SP3 honors it.
208:
123:
611:
199:
list and calls each exception handler in sequence until a handler signals it has handled the exception (by
444:
45:
703:
309:, as well as other programs linked statically with VC runtime, have this function compiled-in instead
160:
function is called that does the reverse operation. Either of these compiler-defined routines can be
153:
542:"Windows Server 2003 Discover Improved System Info, New Kernel, Debugging, Security, and UI APIs"
100:
49:
25:
266:. Vectored Exception Handling is made available to Windows programmers using languages such as
597:
17:
226:
SEH on 64-bit
Windows does not involve a runtime exception handler list; instead, it uses a
161:
119:
21:
673:
631:
615:
545:
527:
470:
334:"A catalog of NTDLL kernel mode to user mode callbacks, part 2: KiUserExceptionDispatcher"
658:"Preventing the Exploitation of Structured Exception Handler (SEH) Overwrites with SEHOP"
563:
415:
352:
348:
697:
502:
581:
275:
271:
200:
400:
641:
212:
397:"Vectored Exception Handling in Windows Server 2003 (Through Internet Archive)"
78:— for this purpose. Other exception handling aspects are backed by a number of
623:
263:
227:
243:
192:
79:
48:
languages introduced later). SEH is set up and handled separately for each
44:
mechanism not present in standard C++ exceptions (but present in most
586:"A Crash Course on the Depths of Win32 Structured Exception Handling"
112:
267:
203:) or the list is exhausted. The last one in the list is always the
108:
104:
333:
247:
524:"Under the Hood: New Vectored Exception Handling in Windows XP"
149:, then adds the record to the list's head. At the end of the
218:
The patent on this mode of SEH, US5628016, expired in 2014.
642:"Reversing Microsoft Visual C++ Part I: Exception Handling"
686:"Old Meets New: Microsoft Windows SafeSEH Incompatibility"
471:"Exceptional Behavior - x64 Structured Exception Handling"
347:
The message can be silenced by altering the process's
176:. If the programmer-defined blocks are present, the
293:
The name varies in different versions of VC runtime
215:where the process is either resumed or terminated.
62:
Exception handling syntax § Microsoft-specific
184:is extended with a few additional fields used by
351:; the default last handler can be replaced with
37:
665:Stéfan Le Berre, Damien Cauquil (22 Dec 2009).
195:code, the operating system parses the thread's
130:statement essentially calls a compiler-defined
441:"Windows Exception Handling - Peter Kleissner"
262:Vectored Exception Handling was introduced in
246:supports using 64-bit SEH for C++ exceptions.
8:
709:Microsoft application programming interfaces
458:Compiler based Structured Exception Handling
612:"win32: Safe Structured Exception Handling"
416:"Structured Exception Handling Functions"
385:
286:
518:
516:
391:
389:
115:version has a link to an undocumented
624:US patent 7,480,919 - Safe exceptions
439:Peter Kleissner (February 14, 2009).
134:function. That function allocates an
7:
86:to raise SEH exceptions manually.
14:
640:Igor Skochinsky (March 6, 2006).
630:Johannes Passing (May 20, 2008).
332:Ken Johnson (November 16, 2007).
326:which is in turn called from the
205:kernel32!UnhandledExceptionFilter
684:Joshua J. Drake (10 Jan 2012).
564:"Structured Exception Handling"
365:ntdll!KiUserExceptionDispatcher
324:ntdll!KiUserExceptionDispatcher
191:In the case of an exception in
562:Microsoft Corp. (2009-11-12).
414:Microsoft Corp. (2009-11-12).
197:_EXCEPTION_REGISTRATION_RECORD
178:_EXCEPTION_REGISTRATION_RECORD
172:blocks are called from within
136:_EXCEPTION_REGISTRATION_RECORD
117:_EXCEPTION_REGISTRATION_RECORD
1:
164:. All the programmer-defined
32:Structured Exception Handling
353:SetUnhandledExceptionFilter
322:system routine called from
258:Vectored Exception Handling
38:Vectored Exception Handling
725:
672:. Sysdream. Archived from
656:Matt Miller (2 Feb 2009).
320:ntdll!RtlDispatchException
59:
632:"Fun with low level SEH"
485:"x64 exception handling"
209:General protection fault
124:Thread Information Block
111:emulation layer for the
82:functions, for example,
489:VC++ 2019 documentation
40:(VEH). It features the
507:Clang 11 documentation
330:kernel function. (See
328:nt!KiDispatchException
254:on both x86 and x64.
24:employ some specific
503:"MSVC compatibility"
122:at the start of its
596:(1). Archived from
447:on October 14, 2013
373:nt!ZwRaiseException
318:More specifically,
207:which displays the
156:a compiler-defined
101:thread of execution
50:thread of execution
26:exception handling
667:"Bypassing SEHOP"
605:/link /safeseh:no
473:. The NT Insider.
186:__except_handler3
174:__except_handler3
143:__except_handler3
22:operating systems
18:Microsoft Windows
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544:. Archived from
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526:. Archived from
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443:. Archived from
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399:. Archived from
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141:pointing to the
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250:clang supports
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228:stack unwinding
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185:
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107:edition or the
97:
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41:
34:
12:
11:
5:
722:
720:
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681:
679:on 2012-09-07.
662:
653:
637:
627:
620:
608:
600:on 2003-08-10.
578:
557:
556:External links
554:
552:
551:
548:on 2008-05-05.
533:
530:on 2008-09-15.
512:
494:
476:
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406:
403:on 2008-01-18.
384:
382:
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256:
242:GCC 4.8+ from
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96:
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90:Implementation
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84:RaiseException
57:
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33:
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369:nt!ZwContinue
367:calls either
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27:
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19:
704:Control flow
674:the original
646:. Retrieved
598:the original
593:
589:
584:(Jan 1997).
582:Matt Pietrek
571:. Retrieved
568:MSDN Library
567:
546:the original
536:
528:the original
506:
497:
488:
479:
465:
457:
449:. Retrieved
445:the original
434:
423:. Retrieved
420:MSDN Library
419:
409:
401:the original
360:
343:
338:for details)
314:
307:kernel32.dll
298:
289:
276:Unix signals
272:Visual Basic
261:
241:
225:
217:
201:return value
190:
145:function in
139:on the stack
98:
65:
35:
28:mechanisms.
15:
232:UNWIND_INFO
213:kernel mode
180:created by
103:in Windows
698:Categories
660:. Technet.
648:2009-11-17
573:2022-07-23
451:2009-11-21
425:2022-07-23
381:References
349:error mode
264:Windows XP
147:msvcrt.dll
60:See also:
46:imperative
20:family of
644:. OpenRCE
303:ntdll.dll
244:Mingw-w64
193:user mode
182:EH_prolog
170:__finally
158:EH_epilog
132:EH_prolog
80:Win32 API
76:__finally
166:__except
72:__except
618:manual.
460:section
238:Support
230:table (
42:finally
222:x86-64
162:inline
126:. The
113:x86-64
677:(PDF)
670:(PDF)
282:Notes
252:__try
154:block
151:__try
128:__try
109:WoW64
105:IA-32
99:Each
95:IA-32
68:__try
56:Usage
616:Yasm
305:and
270:and
248:LLVM
168:and
120:list
74:and
16:The
590:MSJ
371:or
355:API
268:C++
700::
614:.
594:12
592:.
588:.
566:.
515:^
505:.
487:.
456:,
418:.
388:^
278:.
188:.
70:,
52:.
688:.
651:.
634:.
607:.
576:.
509:.
491:.
454:.
428:.
336:.
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