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Diffstat (limited to 'src/pal/tests/palsuite/debug_api/WriteProcessMemory/test4/test4.c')
-rw-r--r-- | src/pal/tests/palsuite/debug_api/WriteProcessMemory/test4/test4.c | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/src/pal/tests/palsuite/debug_api/WriteProcessMemory/test4/test4.c b/src/pal/tests/palsuite/debug_api/WriteProcessMemory/test4/test4.c new file mode 100644 index 0000000000..51db23499b --- /dev/null +++ b/src/pal/tests/palsuite/debug_api/WriteProcessMemory/test4/test4.c @@ -0,0 +1,124 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +/*============================================================= +** +** Source: test4.c +** +** Purpose: Create a child process and debug it. When the child +** raises an exception, it sends back a memory location. Call +** WriteProcessMemory on a restricted memory location and ensure that +** it fails. +** +** +**============================================================*/ + +#include <palsuite.h> +const int MY_EXCEPTION=999; + +int __cdecl main(int argc, char *argv[]) +{ + + PROCESS_INFORMATION pi; + STARTUPINFO si; + DEBUG_EVENT DebugEv; + DWORD dwContinueStatus = DBG_CONTINUE; + int Count, ret; + char* DataBuffer[4096]; + char* Memory; + + if(0 != (PAL_Initialize(argc, argv))) + { + return FAIL; + } + + ZeroMemory( &si, sizeof(si) ); + si.cb = sizeof(si); + ZeroMemory( &pi, sizeof(pi) ); + + memset(DataBuffer, 'z', 4096); + + /* Create a new process. This is the process to be Debugged */ + if(!CreateProcess( NULL, "helper", NULL, NULL, + FALSE, 0, NULL, NULL, &si, &pi)) + { + Fail("ERROR: CreateProcess failed to load executable 'helper'. " + "GetLastError() returned %d.\n",GetLastError()); + } + + /* Call DebugActiveProcess, because the process wasn't created as a + debug process. + */ + if(DebugActiveProcess(pi.dwProcessId) == 0) + { + Fail("ERROR: Failed calling DebugActiveProcess on the process " + "which was created to debug. GetLastError() returned %d.\n", + GetLastError()); + } + + + /* Call WaitForDebugEvent, which will wait until the helper process + raises an exception. + */ + + while(1) + { + if(WaitForDebugEvent(&DebugEv, INFINITE) == 0) + { + Fail("ERROR: WaitForDebugEvent returned 0, indicating failure. " + "GetLastError() returned %d.\n",GetLastError()); + } + + /* We're waiting for the helper process to send this exception. + When it does, we call WriteProcess. If it gets called more than + once, it is ignored. + */ + + if(DebugEv.u.Exception.ExceptionRecord.ExceptionCode == MY_EXCEPTION) + { + + Memory = (LPVOID) + DebugEv.u.Exception.ExceptionRecord.ExceptionInformation[0]; + + /* Write to this memory which we have no access to. */ + + ret = WriteProcessMemory(pi.hProcess, + Memory, + DataBuffer, + 4096, + &Count); + + if(ret != 0) + { + Fail("ERROR: WriteProcessMemory should have failed, as " + "it attempted to write to a range of memory which was " + "not accessible.\n"); + } + + if(GetLastError() != ERROR_NOACCESS) + { + Fail("ERROR: GetLastError() should have returned " + "ERROR_NOACCESS , but intead it returned " + "%d.\n",GetLastError()); + } + } + + if(DebugEv.dwDebugEventCode == EXIT_PROCESS_DEBUG_EVENT) + { + break; + } + + if(ContinueDebugEvent(DebugEv.dwProcessId, + DebugEv.dwThreadId, dwContinueStatus) == 0) + { + Fail("ERROR: ContinueDebugEvent failed to continue the thread " + "which had a debug event. GetLastError() returned %d.\n", + GetLastError()); + } + } + + + PAL_Terminate(); + return PASS; +} |