diff options
Diffstat (limited to 'winsup/mingw/samples/seh')
| -rw-r--r-- | winsup/mingw/samples/seh/eh3.c | 112 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/exutil.c | 68 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/exutil.def | 3 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/exutil.h | 23 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/jamfile | 13 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/sehfix.c | 60 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/sehsub.c | 43 | ||||
| -rw-r--r-- | winsup/mingw/samples/seh/sehtest.c | 72 |
8 files changed, 0 insertions, 394 deletions
diff --git a/winsup/mingw/samples/seh/eh3.c b/winsup/mingw/samples/seh/eh3.c deleted file mode 100644 index 49a06ceab..000000000 --- a/winsup/mingw/samples/seh/eh3.c +++ /dev/null @@ -1,112 +0,0 @@ -int -__except_handler3( - struct _EXCEPTION_RECORD* pExceptionRecord, - struct EXCEPTION_REGISTRATION* pRegistrationFrame, - struct _CONTEXT* pContextRecord, - void* pDispatcherContext - ) -{ - LONG filterFuncRet; - LONG trylevel; - EXCEPTION_POINTERS exceptPtrs; - PSCOPETABLE pScopeTable; - - - CLD // Clear the direction flag (make no assumptions!) - - // if neither the EXCEPTION_UNWINDING nor EXCEPTION_EXIT_UNWIND bit - // is set... This is true the first time through the handler (the - // non-unwinding case) - - if ( ! (pExceptionRecord->ExceptionFlags - & (EXCEPTION_UNWINDING | EXCEPTION_EXIT_UNWIND) - ) ) - { - // Build the EXCEPTION_POINTERS structure on the stack - exceptPtrs.ExceptionRecord = pExceptionRecord; - exceptPtrs.ContextRecord = pContextRecord; - - // Put the pointer to the EXCEPTION_POINTERS 4 bytes below the - // establisher frame. See ASM code for GetExceptionInformation - *(PDWORD)((PBYTE)pRegistrationFrame - 4) = &exceptPtrs; - - // Get initial "trylevel" value - trylevel = pRegistrationFrame->trylevel - - // Get a pointer to the scopetable array - scopeTable = pRegistrationFrame->scopetable; - -search_for_handler: - if ( pRegistrationFrame->trylevel != TRYLEVEL_NONE ) - { - if ( pRegistrationFrame->scopetable[trylevel].lpfnFilter ) - { - - PUSH EBP // Save this frame EBP - - // !!!Very Important!!! Switch to original EBP. This is - // what allows all locals in the frame to have the same - // value as before the exception occurred. - - EBP = &pRegistrationFrame->_ebp - - // Call the filter function - filterFuncRet = scopetable[trylevel].lpfnFilter(); - - POP EBP // Restore handler frame EBP - - if ( filterFuncRet != EXCEPTION_CONTINUE_SEARCH ) - { - if ( filterFuncRet < 0 ) // EXCEPTION_CONTINUE_EXECUTION - return ExceptionContinueExecution; - - // If we get here, EXCEPTION_EXECUTE_HANDLER was specified - scopetable == pRegistrationFrame->scopetable - - // Does the actual OS cleanup of registration frames - // Causes this function to recurse - __global_unwind2( pRegistrationFrame ); - - - // Once we get here, everything is all cleaned up, except - // for the last frame, where we'll continue execution - EBP = &pRegistrationFrame->_ebp - - __local_unwind2( pRegistrationFrame, trylevel ); - - // NLG == "non-local-goto" (setjmp/longjmp stuff) - __NLG_Notify( 1 ); // EAX == scopetable->lpfnHandler - - // Set the current trylevel to whatever SCOPETABLE entry - // was being used when a handler was found - pRegistrationFrame->trylevel = scopetable->previousTryLevel; - - // Call the _except {} block. Never returns. - pRegistrationFrame->scopetable[trylevel].lpfnHandler(); - } - } - - scopeTable = pRegistrationFrame->scopetable; - trylevel = scopeTable->previousTryLevel - - goto search_for_handler; - } - else // trylevel == TRYLEVEL_NONE - { - retvalue == DISPOSITION_CONTINUE_SEARCH; - } - } - else // EXCEPTION_UNWINDING or EXCEPTION_EXIT_UNWIND flags are set - { - PUSH EBP // Save EBP - - EBP = pRegistrationFrame->_ebp // Set EBP for __local_unwind2 - - __local_unwind2( pRegistrationFrame, TRYLEVEL_NONE ) - - POP EBP // Restore EBP - - retvalue == DISPOSITION_CONTINUE_SEARCH; - } -} - diff --git a/winsup/mingw/samples/seh/exutil.c b/winsup/mingw/samples/seh/exutil.c deleted file mode 100644 index 187242cd5..000000000 --- a/winsup/mingw/samples/seh/exutil.c +++ /dev/null @@ -1,68 +0,0 @@ - -#include <stdlib.h> -#include <stdio.h> -#include <excpt.h> -#include <windows.h> - -#include "exutil.h" - -void -WalkExceptionHandlers () -{ - PEXCEPTION_REGISTRATION_RECORD p; - int i; - - __asm__("movl %%fs:0,%%eax;movl %%eax,%0" : "=g" (p) : : "%eax"); - - i = 0; - while (p != (PEXCEPTION_REGISTRATION_RECORD) -1 && p) - { - printf ("Registration %d at %08x : ", i, p); - printf ("Handler = %08x ", p->handler); - printf ("Next Registration = %08x\n", p->prev); - p = p->prev; - i++; - } - printf ("End of exception handler list.\n"); - fflush (stdout); -} - -void -DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec) -{ - printf ("Exception: Code = %08x Flags %08x", pExRec->ExceptionCode, - pExRec->ExceptionFlags); - - if (pExRec->ExceptionFlags) - { - printf (" ( "); - if (pExRec->ExceptionFlags & EH_NONCONTINUABLE) - { - printf ("EH_NONCONTINUABLE "); - } - if (pExRec->ExceptionFlags & EH_UNWINDING) - { - printf ("EH_UNWINDING "); - } - if (pExRec->ExceptionFlags & EH_EXIT_UNWIND) - { - printf ("EH_EXIT_UNWIND "); - } - if (pExRec->ExceptionFlags & EH_STACK_INVALID) - { - printf ("EH_STACK_INVALID "); - } - if (pExRec->ExceptionFlags & EH_NESTED_CALL) - { - printf ("EH_NESTED_CALL "); - } - printf (")\n"); - } - else - { - printf ("\n"); - } - - fflush(stdout); -} - diff --git a/winsup/mingw/samples/seh/exutil.def b/winsup/mingw/samples/seh/exutil.def deleted file mode 100644 index a474be7e5..000000000 --- a/winsup/mingw/samples/seh/exutil.def +++ /dev/null @@ -1,3 +0,0 @@ -EXPORTS - WalkExceptionHandlers - DumpExceptionRecord diff --git a/winsup/mingw/samples/seh/exutil.h b/winsup/mingw/samples/seh/exutil.h deleted file mode 100644 index a56155b96..000000000 --- a/winsup/mingw/samples/seh/exutil.h +++ /dev/null @@ -1,23 +0,0 @@ -/* - * Definitions of some internal stuff for exception handling, including - * a version of the all-important EXCEPTION_REGISTRATION_RECORD. - */ - -#ifndef _EXUTIL_H_ -#define _EXUTIL_H_ - -#include <windows.h> -#include <excpt.h> - -#ifdef __cplusplus -extern "C" { -#endif - -void WalkExceptionHandlers (); -void DumpExceptionRecord (struct _EXCEPTION_RECORD* pExRec); - -#ifdef __cplusplus -} -#endif - -#endif diff --git a/winsup/mingw/samples/seh/jamfile b/winsup/mingw/samples/seh/jamfile deleted file mode 100644 index 04d83c770..000000000 --- a/winsup/mingw/samples/seh/jamfile +++ /dev/null @@ -1,13 +0,0 @@ - -Dll exutil.dll : exutil.c ; - -ImportLib libexutil.a : exutil.def ; - -Main sehtest.exe : sehtest.c ; - -Main sehfix.exe : sehfix.c ; - -Main sehsub.exe : sehsub.c ; - -LinkLibraries sehtest.exe sehfix.exe sehsub.exe : libexutil.a ; - diff --git a/winsup/mingw/samples/seh/sehfix.c b/winsup/mingw/samples/seh/sehfix.c deleted file mode 100644 index be527ab0d..000000000 --- a/winsup/mingw/samples/seh/sehfix.c +++ /dev/null @@ -1,60 +0,0 @@ -/* - * sehfix.c - * - * A test program involving an exception handler that fixes the exception - * causing condition. - * - * In this code we install an exception handler my_handler and then a piece - * of inline assembly attempts to write at the address marked in eax, after - * setting eax to 10. This should produce an exception. The handler then - * changes the eax register of the exception context to be the address of - * a static variable and restarts the code. This should allow everything - * to continue. - */ - -#include <windows.h> -#include <excpt.h> - -#include "exutil.h" - -int x; - -EXCEPTION_DISPOSITION -my_handler ( - struct _EXCEPTION_RECORD* pExceptionRec, - void* pEstablisherFrame, - struct _CONTEXT* pContextRecord, - void* pDispatcherContext - ) -{ - printf ("In my exception handler!\n"); - DumpExceptionRecord (pExceptionRec); - pContextRecord->Eax = (DWORD) &x; - return ExceptionContinueExecution; -} - -main () -{ - x = 2; - - printf ("x = %d\n", x); - - WalkExceptionHandlers(); - - __try1(my_handler) - - WalkExceptionHandlers(); - - /* This assembly code should produce an exception. */ - __asm__("movl $10,%%eax;movl $1,(%%eax);" : : : "%eax"); - - __except1 - - WalkExceptionHandlers(); - - printf ("x = %d\n", x); - - printf ("Finished!\n"); -} - - diff --git a/winsup/mingw/samples/seh/sehsub.c b/winsup/mingw/samples/seh/sehsub.c deleted file mode 100644 index 466b2e8e4..000000000 --- a/winsup/mingw/samples/seh/sehsub.c +++ /dev/null @@ -1,43 +0,0 @@ -/* - * sehsub.c - * - * In an attempt to see what might be going on inside CRTDLL, this program - * walks the exception list after creating a new thread with _beginthread. - * - * It turns out that _beginthread DOES install an exception handler, as - * expected, but this handler is NOT exported by CRTDLL (it is certainly - * not _except_handler2 or _XcptFilter)... an odd and unpleasant turn of - * events. - */ - -#include <windows.h> -#include <excpt.h> -#include <process.h> - -#include "exutil.h" - -extern void* __imp__except_handler3; - -unsigned -my_thread (void * p) -{ - printf ("In my thread.\n"); - WalkExceptionHandlers(); - return 0; -} - -main () -{ - unsigned long h; - unsigned id; - printf ("In main.\n"); - WalkExceptionHandlers(); - - printf ("Except_handler3 %08x\n", __imp__except_handler3); - h = _beginthreadex (NULL, 0, my_thread, NULL, 0, &id); - - WaitForSingleObject ((HANDLE) h, INFINITE); - CloseHandle ((HANDLE) h); - return; -} - diff --git a/winsup/mingw/samples/seh/sehtest.c b/winsup/mingw/samples/seh/sehtest.c deleted file mode 100644 index f1c18d05e..000000000 --- a/winsup/mingw/samples/seh/sehtest.c +++ /dev/null @@ -1,72 +0,0 @@ -/* - * This file tests some of the basics of structured exception handling as - * implemented in excpt.h and the Windows API header files. - * - * The program installs two exception handlers, then attempts to write to - * a pointer to an invalid address. This causes an exception which passes - * through the exception handlers and on to the default system exception - * handler. That handler brings up the dialog box all Windows users know - * and love, and then the program is terminated. - * - * You might note that after the initial run up through our exception frames - * we get a second run up through them with the exception code - * STATUS_INVALID_DISPOSITION and the code EH_UNWINDING. This seems normal - * except that the code got changed from the previous STATUS_ACCESS_VIOLATION. - * I don't understand that bit particularly. - */ - -#include <stdio.h> -#include <excpt.h> - -#include "exutil.h" - -EXCEPTION_DISPOSITION -my_handler ( - struct _EXCEPTION_RECORD* pExceptionRec, - void* pEstablisherFrame, - struct _CONTEXT* pContextRecord, - void* pDispatcherContext - ) -{ - printf ("In my exception handler!\n"); - DumpExceptionRecord (pExceptionRec); - return ExceptionContinueSearch; -} - -EXCEPTION_DISPOSITION -my_handler2 ( - struct _EXCEPTION_RECORD* pExceptionRec, - void* pEstablisherFrame, - struct _CONTEXT* pContextRecord, - void* pDispatcherContext - ) -{ - printf ("In top exception handler!\n"); - DumpExceptionRecord (pExceptionRec); - return ExceptionContinueSearch; -} - -main () -{ - char* x; - - printf ("my_handler2 = %08x\n", my_handler2); - printf ("my_handler = %08x\n", my_handler); - - WalkExceptionHandlers(); - - __try1(my_handler2) - x = (char*) 10; - - WalkExceptionHandlers(); - - __try1(my_handler) - - WalkExceptionHandlers(); - - *x = 1; - __except1 - __except1 - printf ("Finished!\n"); -} - |