mirror of
https://github.com/reactos/reactos.git
synced 2024-10-31 11:56:26 +00:00
317 lines
8.7 KiB
C
317 lines
8.7 KiB
C
/* COPYRIGHT: See COPYING in the top level directory
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* PROJECT: ReactOS Runtime Library
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* PURPOSE: User-Mode Exception Support
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* FILE: lib/rtl/exception.c
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* PROGRAMERS: Alex Ionescu (alex@relsoft.net)
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* David Welch <welch@cwcom.net>
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* Skywing <skywing@valhallalegends.com>
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* KJK::Hyperion <noog@libero.it>
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*/
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/* INCLUDES *****************************************************************/
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#include <rtl.h>
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#define NDEBUG
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#include <debug.h>
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/* GLOBALS *****************************************************************/
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PRTLP_UNHANDLED_EXCEPTION_FILTER RtlpUnhandledExceptionFilter;
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/* FUNCTIONS ***************************************************************/
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#if !defined(_M_IX86) && !defined(_M_AMD64)
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlRaiseException(IN PEXCEPTION_RECORD ExceptionRecord)
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{
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CONTEXT Context;
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NTSTATUS Status;
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/* Capture the context */
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RtlCaptureContext(&Context);
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/* Save the exception address */
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ExceptionRecord->ExceptionAddress = _ReturnAddress();
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/* Write the context flag */
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Context.ContextFlags = CONTEXT_FULL;
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/* Check if user mode debugger is active */
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if (RtlpCheckForActiveDebugger())
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{
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/* Raise an exception immediately */
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Status = ZwRaiseException(ExceptionRecord, &Context, TRUE);
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}
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else
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{
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/* Dispatch the exception and check if we should continue */
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if (!RtlDispatchException(ExceptionRecord, &Context))
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{
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/* Raise the exception */
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Status = ZwRaiseException(ExceptionRecord, &Context, FALSE);
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}
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else
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{
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/* Continue, go back to previous context */
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Status = ZwContinue(&Context, FALSE);
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}
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}
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/* If we returned, raise a status */
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RtlRaiseStatus(Status);
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}
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#endif
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#if !defined(_M_IX86)
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#ifdef _MSC_VER
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#pragma warning(push)
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#pragma warning(disable:4717) // RtlRaiseStatus is recursive by design
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#endif
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlRaiseStatus(IN NTSTATUS Status)
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{
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EXCEPTION_RECORD ExceptionRecord;
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CONTEXT Context;
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/* Capture the context */
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RtlCaptureContext(&Context);
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/* Create an exception record */
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ExceptionRecord.ExceptionAddress = _ReturnAddress();
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ExceptionRecord.ExceptionCode = Status;
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ExceptionRecord.ExceptionRecord = NULL;
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ExceptionRecord.NumberParameters = 0;
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ExceptionRecord.ExceptionFlags = EXCEPTION_NONCONTINUABLE;
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/* Write the context flag */
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Context.ContextFlags = CONTEXT_FULL;
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/* Check if user mode debugger is active */
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if (RtlpCheckForActiveDebugger())
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{
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/* Raise an exception immediately */
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ZwRaiseException(&ExceptionRecord, &Context, TRUE);
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}
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else
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{
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/* Dispatch the exception */
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RtlDispatchException(&ExceptionRecord, &Context);
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/* Raise exception if we got here */
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Status = ZwRaiseException(&ExceptionRecord, &Context, FALSE);
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}
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/* If we returned, raise a status */
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RtlRaiseStatus(Status);
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}
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#ifdef _MSC_VER
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#pragma warning(pop)
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#endif
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#endif
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/*
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* @implemented
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*/
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USHORT
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NTAPI
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RtlCaptureStackBackTrace(IN ULONG FramesToSkip,
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IN ULONG FramesToCapture,
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OUT PVOID *BackTrace,
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OUT PULONG BackTraceHash OPTIONAL)
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{
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PVOID Frames[2 * 64];
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ULONG FrameCount;
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ULONG Hash = 0, i;
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/* Skip a frame for the caller */
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FramesToSkip++;
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/* Don't go past the limit */
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if ((FramesToCapture + FramesToSkip) >= 128) return 0;
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/* Do the back trace */
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FrameCount = RtlWalkFrameChain(Frames, FramesToCapture + FramesToSkip, 0);
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/* Make sure we're not skipping all of them */
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if (FrameCount <= FramesToSkip) return 0;
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/* Loop all the frames */
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for (i = 0; i < FramesToCapture; i++)
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{
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/* Don't go past the limit */
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if ((FramesToSkip + i) >= FrameCount) break;
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/* Save this entry and hash it */
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BackTrace[i] = Frames[FramesToSkip + i];
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Hash += PtrToUlong(BackTrace[i]);
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}
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/* Write the hash */
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if (BackTraceHash) *BackTraceHash = Hash;
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/* Clear the other entries and return count */
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RtlFillMemoryUlong(Frames, 128, 0);
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return (USHORT)i;
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}
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/*
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* Private helper function to lookup the module name from a given address.
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* The address can point to anywhere within the module.
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*/
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static const char*
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_module_name_from_addr(const void* addr, void **module_start_addr,
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char* psz, size_t nChars)
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{
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#if 0
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MEMORY_BASIC_INFORMATION mbi;
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if (VirtualQuery(addr, &mbi, sizeof(mbi)) != sizeof(mbi) ||
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!GetModuleFileNameA((HMODULE) mbi.AllocationBase, psz, nChars))
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{
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psz[0] = '\0';
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*module_start_addr = 0;
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}
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else
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{
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*module_start_addr = (void *) mbi.AllocationBase;
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}
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return psz;
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#else
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psz[0] = '\0';
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*module_start_addr = 0;
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return psz;
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#endif
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}
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static VOID
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_dump_context(PCONTEXT pc)
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{
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#ifdef _M_IX86
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/*
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* Print out the CPU registers
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*/
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DbgPrint("CS:EIP %x:%x\n", pc->SegCs & 0xffff, pc->Eip);
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DbgPrint("DS %x ES %x FS %x GS %x\n", pc->SegDs & 0xffff, pc->SegEs & 0xffff,
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pc->SegFs & 0xffff, pc->SegGs & 0xfff);
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DbgPrint("EAX: %.8x EBX: %.8x ECX: %.8x\n", pc->Eax, pc->Ebx, pc->Ecx);
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DbgPrint("EDX: %.8x EBP: %.8x ESI: %.8x ESP: %.8x\n", pc->Edx,
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pc->Ebp, pc->Esi, pc->Esp);
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DbgPrint("EDI: %.8x EFLAGS: %.8x\n", pc->Edi, pc->EFlags);
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#elif defined(_M_AMD64)
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DbgPrint("CS:RIP %x:%I64x\n", pc->SegCs & 0xffff, pc->Rip);
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DbgPrint("DS %x ES %x FS %x GS %x\n", pc->SegDs & 0xffff, pc->SegEs & 0xffff,
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pc->SegFs & 0xffff, pc->SegGs & 0xfff);
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DbgPrint("RAX: %I64x RBX: %I64x RCX: %I64x RDI: %I64x\n", pc->Rax, pc->Rbx, pc->Rcx, pc->Rdi);
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DbgPrint("RDX: %I64x RBP: %I64x RSI: %I64x RSP: %I64x\n", pc->Rdx, pc->Rbp, pc->Rsi, pc->Rsp);
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DbgPrint("R8: %I64x R9: %I64x R10: %I64x R11: %I64x\n", pc->R8, pc->R9, pc->R10, pc->R11);
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DbgPrint("R12: %I64x R13: %I64x R14: %I64x R15: %I64x\n", pc->R12, pc->R13, pc->R14, pc->R15);
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DbgPrint("EFLAGS: %.8x\n", pc->EFlags);
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#else
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#warning Unknown architecture
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#endif
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}
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static VOID
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PrintStackTrace(struct _EXCEPTION_POINTERS *ExceptionInfo)
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{
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PVOID StartAddr;
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CHAR szMod[128] = "";
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PEXCEPTION_RECORD ExceptionRecord = ExceptionInfo->ExceptionRecord;
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PCONTEXT ContextRecord = ExceptionInfo->ContextRecord;
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/* Print a stack trace. */
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DbgPrint("Unhandled exception\n");
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DbgPrint("ExceptionCode: %8x\n", ExceptionRecord->ExceptionCode);
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if ((NTSTATUS) ExceptionRecord->ExceptionCode == STATUS_ACCESS_VIOLATION &&
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ExceptionRecord->NumberParameters == 2)
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{
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DbgPrint("Faulting Address: %8x\n", ExceptionRecord->ExceptionInformation[1]);
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}
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_dump_context(ContextRecord);
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_module_name_from_addr(ExceptionRecord->ExceptionAddress, &StartAddr, szMod, sizeof(szMod));
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DbgPrint("Address:\n %8x+%-8x %s\n",
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(PVOID) StartAddr,
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(ULONG_PTR) ExceptionRecord->ExceptionAddress - (ULONG_PTR) StartAddr,
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szMod);
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#ifdef _M_IX86
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DbgPrint("Frames:\n");
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_SEH2_TRY
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{
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UINT i;
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PULONG Frame = (PULONG) ContextRecord->Ebp;
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for (i = 0; Frame[1] != 0 && Frame[1] != 0xdeadbeef && i < 128; i++)
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{
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//if (IsBadReadPtr((PVOID) Frame[1], 4))
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if (Frame[1] == 0)
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{
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DbgPrint(" %8x%9s %s\n", Frame[1], "<invalid address>", " ");
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}
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else
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{
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_module_name_from_addr((const void*) Frame[1], &StartAddr,
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szMod, sizeof(szMod));
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DbgPrint(" %8x+%-8x %s\n",
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(PVOID) StartAddr,
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(ULONG_PTR) Frame[1] - (ULONG_PTR) StartAddr,
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szMod);
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}
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if (Frame[0] == 0) break;
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//if (IsBadReadPtr((PVOID) Frame[0], sizeof(*Frame) * 2))
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//break;
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Frame = (PULONG) Frame[0];
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}
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}
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_SEH2_EXCEPT(EXCEPTION_EXECUTE_HANDLER)
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{
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DbgPrint("<error dumping stack trace: 0x%x>\n", _SEH2_GetExceptionCode());
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}
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_SEH2_END;
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#endif
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}
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/*
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* @unimplemented
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*/
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LONG
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NTAPI
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RtlUnhandledExceptionFilter(IN struct _EXCEPTION_POINTERS* ExceptionInfo)
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{
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/* This is used by the security cookie checks, and calso called externally */
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UNIMPLEMENTED;
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PrintStackTrace(ExceptionInfo);
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return ERROR_CALL_NOT_IMPLEMENTED;
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}
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/*
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* @implemented
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*/
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VOID
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NTAPI
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RtlSetUnhandledExceptionFilter(IN PRTLP_UNHANDLED_EXCEPTION_FILTER TopLevelExceptionFilter)
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{
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/* Set the filter which is used by the CriticalSection package */
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RtlpUnhandledExceptionFilter = RtlEncodePointer(TopLevelExceptionFilter);
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}
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