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StackFrameIterator.cpp
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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
#include "common.h"
#include "gcenv.h"
#include "CommonTypes.h"
#include "CommonMacros.h"
#include "daccess.h"
#include "PalRedhawkCommon.h"
#include "PalRedhawk.h"
#include "RedhawkWarnings.h"
#include "rhassert.h"
#include "slist.h"
#include "varint.h"
#include "regdisplay.h"
#include "StackFrameIterator.h"
#include "thread.h"
#include "holder.h"
#include "Crst.h"
#include "event.h"
#include "threadstore.h"
#include "threadstore.inl"
#include "thread.inl"
#include "stressLog.h"
#include "CommonMacros.inl"
#include "shash.h"
#include "RuntimeInstance.h"
#include "rhbinder.h"
#ifdef TARGET_UNIX
#include "UnixContext.h"
#endif
// warning C4061: enumerator '{blah}' in switch of enum '{blarg}' is not explicitly handled by a case label
#pragma warning(disable:4061)
#if !defined(USE_PORTABLE_HELPERS) // @TODO: these are (currently) only implemented in assembly helpers
#if defined(FEATURE_DYNAMIC_CODE)
EXTERN_C CODE_LOCATION ReturnFromUniversalTransition;
EXTERN_C CODE_LOCATION ReturnFromUniversalTransition_DebugStepTailCall;
#endif
EXTERN_C CODE_LOCATION RhpCallCatchFunclet2;
EXTERN_C CODE_LOCATION RhpCallFinallyFunclet2;
EXTERN_C CODE_LOCATION RhpCallFilterFunclet2;
EXTERN_C CODE_LOCATION RhpThrowEx2;
EXTERN_C CODE_LOCATION RhpThrowHwEx2;
EXTERN_C CODE_LOCATION RhpRethrow2;
#endif // !defined(USE_PORTABLE_HELPERS)
// Addresses of functions in the DAC won't match their runtime counterparts so we
// assign them to globals. However it is more performant in the runtime to compare
// against immediates than to fetch the global. This macro hides the difference.
#ifdef DACCESS_COMPILE
#define EQUALS_RETURN_ADDRESS(x, func_name) ((x) == g_ ## func_name ## Addr)
#else
#define EQUALS_RETURN_ADDRESS(x, func_name) ((x) == &func_name)
#endif
#ifdef DACCESS_COMPILE
#define FAILFAST_OR_DAC_FAIL(x) if(!(x)) { DacError(E_FAIL); }
#define FAILFAST_OR_DAC_FAIL_MSG(x, msg) if(!(x)) { DacError(E_FAIL); }
#define FAILFAST_OR_DAC_FAIL_UNCONDITIONALLY(msg) DacError(E_FAIL)
#else
#define FAILFAST_OR_DAC_FAIL(x) if(!(x)) { ASSERT_UNCONDITIONALLY(#x); RhFailFast(); }
#define FAILFAST_OR_DAC_FAIL_MSG(x, msg) if(!(x)) { ASSERT_MSG((x), msg); ASSERT_UNCONDITIONALLY(#x); RhFailFast(); }
#define FAILFAST_OR_DAC_FAIL_UNCONDITIONALLY(msg) { ASSERT_UNCONDITIONALLY(msg); RhFailFast(); }
#endif
StackFrameIterator::StackFrameIterator(Thread * pThreadToWalk, PInvokeTransitionFrame* pInitialTransitionFrame)
{
STRESS_LOG0(LF_STACKWALK, LL_INFO10000, "----Init---- [ GC ]\n");
ASSERT(!pThreadToWalk->IsHijacked());
if (pInitialTransitionFrame == INTERRUPTED_THREAD_MARKER)
{
InternalInit(pThreadToWalk, pThreadToWalk->GetInterruptedContext(), GcStackWalkFlags | ActiveStackFrame);
}
else
{
InternalInit(pThreadToWalk, pInitialTransitionFrame, GcStackWalkFlags);
}
PrepareToYieldFrame();
}
StackFrameIterator::StackFrameIterator(Thread * pThreadToWalk, PTR_PAL_LIMITED_CONTEXT pCtx)
{
STRESS_LOG0(LF_STACKWALK, LL_INFO10000, "----Init with limited ctx---- [ hijack ]\n");
InternalInit(pThreadToWalk, pCtx, 0);
PrepareToYieldFrame();
}
StackFrameIterator::StackFrameIterator(Thread* pThreadToWalk, NATIVE_CONTEXT* pCtx)
{
STRESS_LOG0(LF_STACKWALK, LL_INFO10000, "----Init with native ctx---- [ hijack ]\n");
InternalInit(pThreadToWalk, pCtx, 0);
PrepareToYieldFrame();
}
void StackFrameIterator::ResetNextExInfoForSP(uintptr_t SP)
{
while (m_pNextExInfo && (SP > (uintptr_t)dac_cast<TADDR>(m_pNextExInfo)))
m_pNextExInfo = m_pNextExInfo->m_pPrevExInfo;
}
void StackFrameIterator::EnterInitialInvalidState(Thread * pThreadToWalk)
{
m_pThread = pThreadToWalk;
m_pInstance = GetRuntimeInstance();
m_pCodeManager = NULL;
m_pHijackedReturnValue = NULL;
m_HijackedReturnValueKind = GCRK_Unknown;
m_pConservativeStackRangeLowerBound = NULL;
m_pConservativeStackRangeUpperBound = NULL;
m_pendingFuncletFramePointer = NULL;
m_pNextExInfo = pThreadToWalk->GetCurExInfo();
m_pPreviousTransitionFrame = NULL;
SetControlPC(0);
}
// Prepare to start a stack walk from the context listed in the supplied PInvokeTransitionFrame.
// The supplied frame can be TOP_OF_STACK_MARKER to indicate that there are no more managed
// frames on the stack. Otherwise, the context in the frame always describes a callsite
// where control transitioned from managed to unmanaged code.
// NOTE: When a return address hijack is executed, the PC in the generated PInvokeTransitionFrame
// matches the hijacked return address. This PC is not guaranteed to be in managed code
// since the hijacked return address may refer to a location where an assembly thunk called
// into managed code.
// NOTE: When the PC is in an assembly thunk, this function will unwind to the next managed
// frame and may publish a conservative stack range (if and only if any of the unwound
// thunks report a conservative range).
void StackFrameIterator::InternalInit(Thread * pThreadToWalk, PInvokeTransitionFrame* pFrame, uint32_t dwFlags)
{
// EH stackwalks are always required to unwind non-volatile floating point state. This
// state is never carried by PInvokeTransitionFrames, implying that they can never be used
// as the initial state for an EH stackwalk.
ASSERT_MSG(!(dwFlags & ApplyReturnAddressAdjustment),
"PInvokeTransitionFrame content is not sufficient to seed an EH stackwalk");
EnterInitialInvalidState(pThreadToWalk);
if (pFrame == TOP_OF_STACK_MARKER)
{
// There are no managed frames on the stack. Leave the iterator in its initial invalid state.
return;
}
m_dwFlags = dwFlags;
m_pPreviousTransitionFrame = pFrame;
// We need to walk the ExInfo chain in parallel with the stackwalk so that we know when we cross over
// exception throw points. So we must find our initial point in the ExInfo chain here so that we can
// properly walk it in parallel.
ResetNextExInfoForSP((uintptr_t)dac_cast<TADDR>(pFrame));
#if !defined(USE_PORTABLE_HELPERS) // @TODO: no portable version of regdisplay
memset(&m_RegDisplay, 0, sizeof(m_RegDisplay));
m_RegDisplay.SetIP((PCODE)PCODEToPINSTR((PCODE)pFrame->m_RIP));
SetControlPC(dac_cast<PTR_VOID>(m_RegDisplay.GetIP()));
PTR_uintptr_t pPreservedRegsCursor = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_PreservedRegs);
#ifdef TARGET_ARM
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_RIP);
if (pFrame->m_Flags & PTFF_SAVE_R4) { m_RegDisplay.pR4 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R5) { m_RegDisplay.pR5 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R6) { m_RegDisplay.pR6 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R7) { m_RegDisplay.pR7 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R8) { m_RegDisplay.pR8 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R9) { m_RegDisplay.pR9 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R10) { m_RegDisplay.pR10 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_SP) { m_RegDisplay.SP = *pPreservedRegsCursor++; }
m_RegDisplay.pR11 = (PTR_uintptr_t) PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_FramePointer);
if (pFrame->m_Flags & PTFF_SAVE_R0) { m_RegDisplay.pR0 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R1) { m_RegDisplay.pR1 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R2) { m_RegDisplay.pR2 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R3) { m_RegDisplay.pR3 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_LR) { m_RegDisplay.pLR = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_R0_IS_GCREF)
{
m_pHijackedReturnValue = (PTR_OBJECTREF) m_RegDisplay.pR0;
m_HijackedReturnValueKind = GCRK_Object;
}
if (pFrame->m_Flags & PTFF_R0_IS_BYREF)
{
m_pHijackedReturnValue = (PTR_OBJECTREF) m_RegDisplay.pR0;
m_HijackedReturnValueKind = GCRK_Byref;
}
#elif defined(TARGET_ARM64)
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_FramePointer);
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_RIP);
ASSERT(!(pFrame->m_Flags & PTFF_SAVE_FP)); // FP should never contain a GC ref
if (pFrame->m_Flags & PTFF_SAVE_X19) { m_RegDisplay.pX19 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X20) { m_RegDisplay.pX20 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X21) { m_RegDisplay.pX21 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X22) { m_RegDisplay.pX22 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X23) { m_RegDisplay.pX23 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X24) { m_RegDisplay.pX24 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X25) { m_RegDisplay.pX25 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X26) { m_RegDisplay.pX26 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X27) { m_RegDisplay.pX27 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X28) { m_RegDisplay.pX28 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_SP) { m_RegDisplay.SP = *pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X0) { m_RegDisplay.pX0 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X1) { m_RegDisplay.pX1 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X2) { m_RegDisplay.pX2 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X3) { m_RegDisplay.pX3 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X4) { m_RegDisplay.pX4 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X5) { m_RegDisplay.pX5 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X6) { m_RegDisplay.pX6 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X7) { m_RegDisplay.pX7 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X8) { m_RegDisplay.pX8 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X9) { m_RegDisplay.pX9 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X10) { m_RegDisplay.pX10 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X11) { m_RegDisplay.pX11 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X12) { m_RegDisplay.pX12 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X13) { m_RegDisplay.pX13 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X14) { m_RegDisplay.pX14 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X15) { m_RegDisplay.pX15 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X16) { m_RegDisplay.pX16 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X17) { m_RegDisplay.pX17 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_X18) { m_RegDisplay.pX18 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_LR) { m_RegDisplay.pLR = pPreservedRegsCursor++; }
GCRefKind retValueKind = TransitionFrameFlagsToReturnKind(pFrame->m_Flags);
if (retValueKind != GCRK_Scalar)
{
m_pHijackedReturnValue = (PTR_OBJECTREF)m_RegDisplay.pX0;
m_HijackedReturnValueKind = retValueKind;
}
#elif defined(TARGET_LOONGARCH64)
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_FramePointer);
m_RegDisplay.pRA = (PTR_uintptr_t)PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_RIP);
ASSERT(!(pFrame->m_Flags & PTFF_SAVE_FP)); // FP should never contain a GC ref
if (pFrame->m_Flags & PTFF_SAVE_R23) { m_RegDisplay.pR23 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R24) { m_RegDisplay.pR24 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R25) { m_RegDisplay.pR25 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R26) { m_RegDisplay.pR26 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R27) { m_RegDisplay.pR27 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R28) { m_RegDisplay.pR28 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R29) { m_RegDisplay.pR29 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R30) { m_RegDisplay.pR30 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R31) { m_RegDisplay.pR31 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_SP) { m_RegDisplay.SP = *pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R0) { m_RegDisplay.pR0 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RA) { m_RegDisplay.pRA = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R2) { m_RegDisplay.pR2 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R4) { m_RegDisplay.pR4 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R5) { m_RegDisplay.pR5 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R6) { m_RegDisplay.pR6 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R7) { m_RegDisplay.pR7 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R8) { m_RegDisplay.pR8 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R9) { m_RegDisplay.pR9 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R10) { m_RegDisplay.pR10 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R11) { m_RegDisplay.pR11 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R12) { m_RegDisplay.pR12 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R13) { m_RegDisplay.pR13 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R14) { m_RegDisplay.pR14 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R15) { m_RegDisplay.pR15 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R16) { m_RegDisplay.pR16 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R17) { m_RegDisplay.pR17 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R18) { m_RegDisplay.pR18 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R19) { m_RegDisplay.pR19 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R20) { m_RegDisplay.pR20 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R21) { m_RegDisplay.pR21 = pPreservedRegsCursor++; }
GCRefKind retValueKind = TransitionFrameFlagsToReturnKind(pFrame->m_Flags);
if (retValueKind != GCRK_Scalar)
{
m_pHijackedReturnValue = (PTR_OBJECTREF)m_RegDisplay.pR4;
m_HijackedReturnValueKind = retValueKind;
}
#else // TARGET_ARM
if (pFrame->m_Flags & PTFF_SAVE_RBX) { m_RegDisplay.pRbx = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RSI) { m_RegDisplay.pRsi = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RDI) { m_RegDisplay.pRdi = pPreservedRegsCursor++; }
ASSERT(!(pFrame->m_Flags & PTFF_SAVE_RBP)); // RBP should never contain a GC ref because we require
// a frame pointer for methods with pinvokes
#ifdef TARGET_AMD64
if (pFrame->m_Flags & PTFF_SAVE_R12) { m_RegDisplay.pR12 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R13) { m_RegDisplay.pR13 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R14) { m_RegDisplay.pR14 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R15) { m_RegDisplay.pR15 = pPreservedRegsCursor++; }
#endif // TARGET_AMD64
m_RegDisplay.pRbp = (PTR_uintptr_t) PTR_HOST_MEMBER_TADDR(PInvokeTransitionFrame, pFrame, m_FramePointer);
if (pFrame->m_Flags & PTFF_SAVE_RSP) { m_RegDisplay.SP = *pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RAX) { m_RegDisplay.pRax = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RCX) { m_RegDisplay.pRcx = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_RDX) { m_RegDisplay.pRdx = pPreservedRegsCursor++; }
#ifdef TARGET_AMD64
if (pFrame->m_Flags & PTFF_SAVE_R8 ) { m_RegDisplay.pR8 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R9 ) { m_RegDisplay.pR9 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R10) { m_RegDisplay.pR10 = pPreservedRegsCursor++; }
if (pFrame->m_Flags & PTFF_SAVE_R11) { m_RegDisplay.pR11 = pPreservedRegsCursor++; }
#endif // TARGET_AMD64
GCRefKind retValueKind = TransitionFrameFlagsToReturnKind(pFrame->m_Flags);
if (retValueKind != GCRK_Scalar)
{
m_pHijackedReturnValue = (PTR_OBJECTREF)m_RegDisplay.pRax;
m_HijackedReturnValueKind = retValueKind;
}
#endif // TARGET_ARM
// adjust for thunks, if needed
EnsureInitializedToManagedFrame();
#endif // !defined(USE_PORTABLE_HELPERS)
STRESS_LOG1(LF_STACKWALK, LL_INFO10000, " %p\n", m_ControlPC);
}
#ifndef DACCESS_COMPILE
void StackFrameIterator::InternalInitForEH(Thread * pThreadToWalk, PAL_LIMITED_CONTEXT * pCtx, bool instructionFault)
{
STRESS_LOG0(LF_STACKWALK, LL_INFO10000, "----Init---- [ EH ]\n");
InternalInit(pThreadToWalk, pCtx, EHStackWalkFlags);
if (instructionFault)
{
// We treat the IP as a return-address and adjust backward when doing EH-related things. The faulting
// instruction IP here will be the start of the faulting instruction and so we have the right IP for
// EH-related things already.
m_dwFlags &= ~ApplyReturnAddressAdjustment;
PrepareToYieldFrame();
m_dwFlags |= ApplyReturnAddressAdjustment;
}
else
{
PrepareToYieldFrame();
}
STRESS_LOG1(LF_STACKWALK, LL_INFO10000, " %p\n", m_ControlPC);
}
void StackFrameIterator::InternalInitForStackTrace()
{
STRESS_LOG0(LF_STACKWALK, LL_INFO10000, "----Init---- [ StackTrace ]\n");
Thread * pThreadToWalk = ThreadStore::GetCurrentThread();
PInvokeTransitionFrame* pFrame = pThreadToWalk->GetTransitionFrameForStackTrace();
InternalInit(pThreadToWalk, pFrame, StackTraceStackWalkFlags);
PrepareToYieldFrame();
}
#endif //!DACCESS_COMPILE
// Prepare to start a stack walk from the context listed in the supplied PAL_LIMITED_CONTEXT.
// The supplied context can describe a location in either managed or unmanaged code. In the
// latter case the iterator is left in an invalid state when this function returns.
void StackFrameIterator::InternalInit(Thread * pThreadToWalk, PTR_PAL_LIMITED_CONTEXT pCtx, uint32_t dwFlags)
{
ASSERT((dwFlags & MethodStateCalculated) == 0);
EnterInitialInvalidState(pThreadToWalk);
m_dwFlags = dwFlags;
// We need to walk the ExInfo chain in parallel with the stackwalk so that we know when we cross over
// exception throw points. So we must find our initial point in the ExInfo chain here so that we can
// properly walk it in parallel.
ResetNextExInfoForSP(pCtx->GetSp());
// This codepath is used by the hijack stackwalk and we can get arbitrary ControlPCs from there. If this
// context has a non-managed control PC, then we're done.
if (!m_pInstance->IsManaged(dac_cast<PTR_VOID>(pCtx->GetIp())))
return;
//
// control state
//
m_RegDisplay.SP = pCtx->GetSp();
m_RegDisplay.IP = PCODEToPINSTR(pCtx->GetIp());
SetControlPC(dac_cast<PTR_VOID>(m_RegDisplay.GetIP()));
#ifdef TARGET_ARM
//
// preserved regs
//
m_RegDisplay.pR4 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R4);
m_RegDisplay.pR5 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R5);
m_RegDisplay.pR6 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R6);
m_RegDisplay.pR7 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R7);
m_RegDisplay.pR8 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R8);
m_RegDisplay.pR9 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R9);
m_RegDisplay.pR10 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R10);
m_RegDisplay.pR11 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R11);
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, LR);
//
// preserved vfp regs
//
for (int32_t i = 0; i < 16 - 8; i++)
{
m_RegDisplay.D[i] = pCtx->D[i];
}
//
// scratch regs
//
m_RegDisplay.pR0 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R0);
#elif defined(TARGET_ARM64)
//
// preserved regs
//
m_RegDisplay.pX19 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X19);
m_RegDisplay.pX20 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X20);
m_RegDisplay.pX21 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X21);
m_RegDisplay.pX22 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X22);
m_RegDisplay.pX23 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X23);
m_RegDisplay.pX24 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X24);
m_RegDisplay.pX25 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X25);
m_RegDisplay.pX26 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X26);
m_RegDisplay.pX27 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X27);
m_RegDisplay.pX28 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X28);
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, FP);
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, LR);
//
// preserved vfp regs
//
for (int32_t i = 0; i < 16 - 8; i++)
{
m_RegDisplay.D[i] = pCtx->D[i];
}
//
// scratch regs
//
m_RegDisplay.pX0 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X0);
m_RegDisplay.pX1 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, X1);
// TODO: Copy X2-X7 when we start supporting HVA's
#elif defined(TARGET_LOONGARCH64)
//
// preserved regs
//
m_RegDisplay.pR23 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R23);
m_RegDisplay.pR24 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R24);
m_RegDisplay.pR25 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R25);
m_RegDisplay.pR26 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R26);
m_RegDisplay.pR27 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R27);
m_RegDisplay.pR28 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R28);
m_RegDisplay.pR29 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R29);
m_RegDisplay.pR30 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R30);
m_RegDisplay.pR31 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R31);
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, FP);
m_RegDisplay.pRA = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, RA);
//
// preserved vfp regs
//
for (int32_t i = 0; i < 16 - 8; i++)
{
m_RegDisplay.F[i] = pCtx->F[i];
}
//
// scratch regs
//
m_RegDisplay.pR4 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R4);
m_RegDisplay.pR5 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R5);
#elif defined(UNIX_AMD64_ABI)
//
// preserved regs
//
m_RegDisplay.pRbp = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rbp);
m_RegDisplay.pRbx = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rbx);
m_RegDisplay.pR12 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R12);
m_RegDisplay.pR13 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R13);
m_RegDisplay.pR14 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R14);
m_RegDisplay.pR15 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R15);
//
// scratch regs
//
m_RegDisplay.pRax = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rax);
m_RegDisplay.pRcx = NULL;
m_RegDisplay.pRdx = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rdx);
m_RegDisplay.pRsi = NULL;
m_RegDisplay.pRdi = NULL;
m_RegDisplay.pR8 = NULL;
m_RegDisplay.pR9 = NULL;
m_RegDisplay.pR10 = NULL;
m_RegDisplay.pR11 = NULL;
#elif defined(TARGET_X86) || defined(TARGET_AMD64)
//
// preserved regs
//
m_RegDisplay.pRbp = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rbp);
m_RegDisplay.pRsi = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rsi);
m_RegDisplay.pRdi = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rdi);
m_RegDisplay.pRbx = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rbx);
#ifdef TARGET_AMD64
m_RegDisplay.pR12 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R12);
m_RegDisplay.pR13 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R13);
m_RegDisplay.pR14 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R14);
m_RegDisplay.pR15 = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, R15);
#if defined(TARGET_WINDOWS)
//
// SSP, we only need the value
//
m_RegDisplay.SSP = pCtx->SSP;
#endif
//
// preserved xmm regs
//
memcpy(m_RegDisplay.Xmm, &pCtx->Xmm6, sizeof(m_RegDisplay.Xmm));
#endif // TARGET_AMD64
//
// scratch regs
//
m_RegDisplay.pRax = (PTR_uintptr_t)PTR_TO_MEMBER_TADDR(PAL_LIMITED_CONTEXT, pCtx, Rax);
m_RegDisplay.pRcx = NULL;
m_RegDisplay.pRdx = NULL;
#ifdef TARGET_AMD64
m_RegDisplay.pR8 = NULL;
m_RegDisplay.pR9 = NULL;
m_RegDisplay.pR10 = NULL;
m_RegDisplay.pR11 = NULL;
#endif // TARGET_AMD64
#else
PORTABILITY_ASSERT("StackFrameIterator::InternalInit");
#endif // TARGET_ARM
}
// Prepare to start a stack walk from the context listed in the supplied NATIVE_CONTEXT.
// NOTE: When a return address hijack is executed, the PC in the NATIVE_CONTEXT
// matches the hijacked return address. This PC is not guaranteed to be in managed code
// since the hijacked return address may refer to a location where an assembly thunk called
// into managed code.
// NOTE: When the PC is in an assembly thunk, this function will unwind to the next managed
// frame and may publish a conservative stack range (if and only if any of the unwound
// thunks report a conservative range).
void StackFrameIterator::InternalInit(Thread * pThreadToWalk, NATIVE_CONTEXT* pCtx, uint32_t dwFlags)
{
ASSERT((dwFlags & MethodStateCalculated) == 0);
EnterInitialInvalidState(pThreadToWalk);
m_dwFlags = dwFlags;
// We need to walk the ExInfo chain in parallel with the stackwalk so that we know when we cross over
// exception throw points. So we must find our initial point in the ExInfo chain here so that we can
// properly walk it in parallel.
ResetNextExInfoForSP(pCtx->GetSp());
// This codepath is used by the hijack stackwalk. The IP must be in managed code
// or in a conservatively reported assembly thunk.
ASSERT(IsValidReturnAddress((void*)pCtx->GetIp()));
//
// control state
//
SetControlPC(dac_cast<PTR_VOID>(pCtx->GetIp()));
m_RegDisplay.SP = pCtx->GetSp();
m_RegDisplay.IP = pCtx->GetIp();
#ifdef TARGET_UNIX
#define PTR_TO_REG(ptr, reg) (&((ptr)->reg()))
#else
#define PTR_TO_REG(ptr, reg) (&((ptr)->reg))
#endif
#ifdef TARGET_ARM64
//
// preserved regs
//
m_RegDisplay.pX19 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X19);
m_RegDisplay.pX20 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X20);
m_RegDisplay.pX21 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X21);
m_RegDisplay.pX22 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X22);
m_RegDisplay.pX23 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X23);
m_RegDisplay.pX24 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X24);
m_RegDisplay.pX25 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X25);
m_RegDisplay.pX26 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X26);
m_RegDisplay.pX27 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X27);
m_RegDisplay.pX28 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X28);
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_TO_REG(pCtx, Fp);
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_TO_REG(pCtx, Lr);
//
// scratch regs
//
m_RegDisplay.pX0 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X0);
m_RegDisplay.pX1 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X1);
m_RegDisplay.pX2 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X2);
m_RegDisplay.pX3 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X3);
m_RegDisplay.pX4 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X4);
m_RegDisplay.pX5 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X5);
m_RegDisplay.pX6 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X6);
m_RegDisplay.pX7 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X7);
m_RegDisplay.pX8 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X8);
m_RegDisplay.pX9 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X9);
m_RegDisplay.pX10 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X10);
m_RegDisplay.pX11 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X11);
m_RegDisplay.pX12 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X12);
m_RegDisplay.pX13 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X13);
m_RegDisplay.pX14 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X14);
m_RegDisplay.pX15 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X15);
m_RegDisplay.pX16 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X16);
m_RegDisplay.pX17 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X17);
m_RegDisplay.pX18 = (PTR_uintptr_t)PTR_TO_REG(pCtx, X18);
#elif defined(TARGET_AMD64)
//
// preserved regs
//
m_RegDisplay.pRbp = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rbp);
m_RegDisplay.pRsi = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rsi);
m_RegDisplay.pRdi = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rdi);
m_RegDisplay.pRbx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rbx);
m_RegDisplay.pR12 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R12);
m_RegDisplay.pR13 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R13);
m_RegDisplay.pR14 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R14);
m_RegDisplay.pR15 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R15);
#if defined(TARGET_WINDOWS)
//
// SSP, not needed. Unwind from native context is never for EH.
//
m_RegDisplay.SSP = 0;
#endif
//
// scratch regs
//
m_RegDisplay.pRax = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rax);
m_RegDisplay.pRcx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rcx);
m_RegDisplay.pRdx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Rdx);
m_RegDisplay.pR8 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R8);
m_RegDisplay.pR9 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R9);
m_RegDisplay.pR10 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R10);
m_RegDisplay.pR11 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R11);
#elif defined(TARGET_X86)
//
// preserved regs
//
m_RegDisplay.pRbp = (PTR_uintptr_t)PTR_TO_REG(pCtx, Ebp);
m_RegDisplay.pRsi = (PTR_uintptr_t)PTR_TO_REG(pCtx, Esi);
m_RegDisplay.pRdi = (PTR_uintptr_t)PTR_TO_REG(pCtx, Edi);
m_RegDisplay.pRbx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Ebx);
//
// scratch regs
//
m_RegDisplay.pRax = (PTR_uintptr_t)PTR_TO_REG(pCtx, Eax);
m_RegDisplay.pRcx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Ecx);
m_RegDisplay.pRdx = (PTR_uintptr_t)PTR_TO_REG(pCtx, Edx);
#elif defined(TARGET_ARM)
m_RegDisplay.pR0 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R0);
m_RegDisplay.pR1 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R1);
m_RegDisplay.pR2 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R2);
m_RegDisplay.pR3 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R3);
m_RegDisplay.pR4 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R4);
m_RegDisplay.pR5 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R5);
m_RegDisplay.pR6 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R6);
m_RegDisplay.pR7 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R7);
m_RegDisplay.pR8 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R8);
m_RegDisplay.pR9 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R9);
m_RegDisplay.pR10 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R10);
m_RegDisplay.pR11 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R11);
m_RegDisplay.pR12 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R12);
m_RegDisplay.pLR = (PTR_uintptr_t)PTR_TO_REG(pCtx, Lr);
#elif defined(TARGET_LOONGARCH64)
//
// preserved regs
//
m_RegDisplay.pR23 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R23);
m_RegDisplay.pR24 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R24);
m_RegDisplay.pR25 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R25);
m_RegDisplay.pR26 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R26);
m_RegDisplay.pR27 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R27);
m_RegDisplay.pR28 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R28);
m_RegDisplay.pR29 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R29);
m_RegDisplay.pR30 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R30);
m_RegDisplay.pR31 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R31);
m_RegDisplay.pFP = (PTR_uintptr_t)PTR_TO_REG(pCtx, Fp);
m_RegDisplay.pRA = (PTR_uintptr_t)PTR_TO_REG(pCtx, Ra);
//
// scratch regs
//
m_RegDisplay.pR0 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R0);
m_RegDisplay.pR2 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R2);
m_RegDisplay.pR4 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R4);
m_RegDisplay.pR5 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R5);
m_RegDisplay.pR6 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R6);
m_RegDisplay.pR7 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R7);
m_RegDisplay.pR8 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R8);
m_RegDisplay.pR9 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R9);
m_RegDisplay.pR10 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R10);
m_RegDisplay.pR11 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R11);
m_RegDisplay.pR12 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R12);
m_RegDisplay.pR13 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R13);
m_RegDisplay.pR14 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R14);
m_RegDisplay.pR15 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R15);
m_RegDisplay.pR16 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R16);
m_RegDisplay.pR17 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R17);
m_RegDisplay.pR18 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R18);
m_RegDisplay.pR19 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R19);
m_RegDisplay.pR20 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R20);
m_RegDisplay.pR21 = (PTR_uintptr_t)PTR_TO_REG(pCtx, R21);
#else
PORTABILITY_ASSERT("StackFrameIterator::InternalInit");
#endif // TARGET_ARM
#undef PTR_TO_REG
// adjust for thunks, if needed
EnsureInitializedToManagedFrame();
}
void StackFrameIterator::EnsureInitializedToManagedFrame()
{
// This function guarantees that the final initialized context will refer to a managed
// frame. In the rare case where the PC does not refer to managed code (and refers to an
// assembly thunk instead), unwind through the thunk sequence to find the nearest managed
// frame.
// NOTE: When thunks are present, the thunk sequence may report a conservative GC reporting
// lower bound that must be applied when processing the managed frame.
ReturnAddressCategory category = CategorizeUnadjustedReturnAddress(m_ControlPC);
if (category == InManagedCode)
{
ASSERT(m_pInstance->IsManaged(m_ControlPC));
}
else if (IsNonEHThunk(category))
{
UnwindNonEHThunkSequence();
ASSERT(m_pInstance->IsManaged(m_ControlPC));
}
else
{
FAILFAST_OR_DAC_FAIL_UNCONDITIONALLY("Unadjusted initial PC points to an unexpected assembly thunk kind.");
}
}
PTR_VOID StackFrameIterator::HandleExCollide(PTR_ExInfo pExInfo)
{
STRESS_LOG3(LF_STACKWALK, LL_INFO10000, " [ ex collide ] kind = %d, pass = %d, idxCurClause = %d\n",
pExInfo->m_kind, pExInfo->m_passNumber, pExInfo->m_idxCurClause);
PTR_VOID collapsingTargetFrame = NULL;
uint32_t curFlags = m_dwFlags;
// Capture and clear the pending funclet frame pointer (if any). This field is only set
// when stack walks collide with active exception dispatch, and only exists to save the
// funclet frame pointer until the next ExInfo collision (which has now occurred).
PTR_VOID activeFuncletFramePointer = m_pendingFuncletFramePointer;
m_pendingFuncletFramePointer = NULL;
// If we aren't invoking a funclet (i.e. idxCurClause == -1), and we're doing a GC stackwalk, we don't
// want the 2nd-pass collided behavior because that behavior assumes that the previous frame was a
// funclet, which isn't the case when taking a GC at some points in the EH dispatch code. So we treat it
// as if the 2nd pass hasn't actually started yet.
if ((pExInfo->m_passNumber == 1) ||
(pExInfo->m_idxCurClause == 0xFFFFFFFF))
{
FAILFAST_OR_DAC_FAIL_MSG(!(curFlags & ApplyReturnAddressAdjustment),
"did not expect to collide with a 1st-pass ExInfo during a EH stackwalk");
InternalInit(m_pThread, pExInfo->m_pExContext, curFlags);
m_pNextExInfo = pExInfo->m_pPrevExInfo;
CalculateCurrentMethodState();
ASSERT(IsValid());
if ((pExInfo->m_kind & EK_HardwareFault) && (curFlags & RemapHardwareFaultsToSafePoint))
m_effectiveSafePointAddress = GetCodeManager()->RemapHardwareFaultToGCSafePoint(&m_methodInfo, m_ControlPC);
}
else
{
ASSERT_MSG(activeFuncletFramePointer != NULL,
"collided with an active funclet invoke but the funclet frame pointer is unknown");
//
// Copy our state from the previous StackFrameIterator
//
this->UpdateFromExceptionDispatch((PTR_StackFrameIterator)&pExInfo->m_frameIter);
// Sync our 'current' ExInfo with the updated state (we may have skipped other dispatches)
ResetNextExInfoForSP(m_RegDisplay.GetSP());
// In case m_ControlPC is pre-adjusted, counteract here, since the caller of this routine
// will apply the adjustment again once we return. If the m_ControlPC is not pre-adjusted,
// this is simply an no-op.
m_ControlPC = m_OriginalControlPC;
m_dwFlags = curFlags;
// The iterator has been moved to the "owner frame" (either a parent funclet or the main
// code body) of the funclet being invoked by this ExInfo. As a result, both the active
// funclet and the current frame must be "part of the same function" and therefore must
// have identical frame pointer values.
CalculateCurrentMethodState();
ASSERT(IsValid());
ASSERT(m_FramePointer == activeFuncletFramePointer);
if ((m_ControlPC != 0) && // the dispatch in ExInfo could have gone unhandled
(m_dwFlags & CollapseFunclets))
{
// GC stack walks must skip the owner frame since GC information for the entire function
// has already been reported by the leafmost active funclet. In general, the GC stack walk
// must skip all parent frames that are "part of the same function" (i.e., have the same
// frame pointer).
collapsingTargetFrame = activeFuncletFramePointer;
}
}
return collapsingTargetFrame;
}
void StackFrameIterator::UpdateFromExceptionDispatch(PTR_StackFrameIterator pSourceIterator)
{
ASSERT(m_pendingFuncletFramePointer == NULL);
PreservedRegPtrs thisFuncletPtrs = this->m_funcletPtrs;
// Blast over 'this' with everything from the 'source'.
*this = *pSourceIterator;
// Clear the funclet frame pointer (if any) that was loaded from the previous iterator.
// This field does not relate to the transferrable state of the previous iterator (it
// instead tracks the frame-by-frame progression of a particular iterator instance) and
// therefore has no meaning in the context of the current stack walk.
m_pendingFuncletFramePointer = NULL;
// Then, put back the pointers to the funclet's preserved registers (since those are the correct values
// until the funclet completes, at which point the values will be copied back to the ExInfo's REGDISPLAY).
#ifdef TARGET_ARM
m_RegDisplay.pR4 = thisFuncletPtrs.pR4 ;
m_RegDisplay.pR5 = thisFuncletPtrs.pR5 ;
m_RegDisplay.pR6 = thisFuncletPtrs.pR6 ;
m_RegDisplay.pR7 = thisFuncletPtrs.pR7 ;
m_RegDisplay.pR8 = thisFuncletPtrs.pR8 ;
m_RegDisplay.pR9 = thisFuncletPtrs.pR9 ;
m_RegDisplay.pR10 = thisFuncletPtrs.pR10;
m_RegDisplay.pR11 = thisFuncletPtrs.pR11;
#elif defined(TARGET_ARM64)
m_RegDisplay.pX19 = thisFuncletPtrs.pX19;
m_RegDisplay.pX20 = thisFuncletPtrs.pX20;
m_RegDisplay.pX21 = thisFuncletPtrs.pX21;
m_RegDisplay.pX22 = thisFuncletPtrs.pX22;
m_RegDisplay.pX23 = thisFuncletPtrs.pX23;
m_RegDisplay.pX24 = thisFuncletPtrs.pX24;
m_RegDisplay.pX25 = thisFuncletPtrs.pX25;
m_RegDisplay.pX26 = thisFuncletPtrs.pX26;
m_RegDisplay.pX27 = thisFuncletPtrs.pX27;
m_RegDisplay.pX28 = thisFuncletPtrs.pX28;
m_RegDisplay.pFP = thisFuncletPtrs.pFP;
#elif defined(TARGET_LOONGARCH64)
m_RegDisplay.pR23 = thisFuncletPtrs.pR23;
m_RegDisplay.pR24 = thisFuncletPtrs.pR24;
m_RegDisplay.pR25 = thisFuncletPtrs.pR25;
m_RegDisplay.pR26 = thisFuncletPtrs.pR26;
m_RegDisplay.pR27 = thisFuncletPtrs.pR27;
m_RegDisplay.pR28 = thisFuncletPtrs.pR28;
m_RegDisplay.pR29 = thisFuncletPtrs.pR29;
m_RegDisplay.pR30 = thisFuncletPtrs.pR30;
m_RegDisplay.pR31 = thisFuncletPtrs.pR31;
m_RegDisplay.pFP = thisFuncletPtrs.pFP;
#elif defined(UNIX_AMD64_ABI)
// Save the preserved regs portion of the REGDISPLAY across the unwind through the C# EH dispatch code.
m_RegDisplay.pRbp = thisFuncletPtrs.pRbp;
m_RegDisplay.pRbx = thisFuncletPtrs.pRbx;
m_RegDisplay.pR12 = thisFuncletPtrs.pR12;
m_RegDisplay.pR13 = thisFuncletPtrs.pR13;
m_RegDisplay.pR14 = thisFuncletPtrs.pR14;
m_RegDisplay.pR15 = thisFuncletPtrs.pR15;
#elif defined(TARGET_X86) || defined(TARGET_AMD64)
// Save the preserved regs portion of the REGDISPLAY across the unwind through the C# EH dispatch code.
m_RegDisplay.pRbp = thisFuncletPtrs.pRbp;
m_RegDisplay.pRdi = thisFuncletPtrs.pRdi;
m_RegDisplay.pRsi = thisFuncletPtrs.pRsi;
m_RegDisplay.pRbx = thisFuncletPtrs.pRbx;
#ifdef TARGET_AMD64
m_RegDisplay.pR12 = thisFuncletPtrs.pR12;
m_RegDisplay.pR13 = thisFuncletPtrs.pR13;
m_RegDisplay.pR14 = thisFuncletPtrs.pR14;
m_RegDisplay.pR15 = thisFuncletPtrs.pR15;
#endif // TARGET_AMD64
#else
PORTABILITY_ASSERT("StackFrameIterator::UpdateFromExceptionDispatch");
#endif
}
#ifdef TARGET_AMD64
typedef DPTR(Fp128) PTR_Fp128;
#endif
// The invoke of a funclet is a bit special and requires an assembly thunk, but we don't want to break the
// stackwalk due to this. So this routine will unwind through the assembly thunks used to invoke funclets.
// It's also used to disambiguate exceptionally- and non-exceptionally-invoked funclets.
void StackFrameIterator::UnwindFuncletInvokeThunk()
{
ASSERT((m_dwFlags & MethodStateCalculated) == 0);
#if defined(USE_PORTABLE_HELPERS) // @TODO: Currently no funclet invoke defined in a portable way
return;
#else // defined(USE_PORTABLE_HELPERS)
ASSERT((CategorizeUnadjustedReturnAddress(m_ControlPC) == InFuncletInvokeThunk) ||
(CategorizeUnadjustedReturnAddress(m_ControlPC) == InFilterFuncletInvokeThunk));
PTR_uintptr_t SP;
bool isFilterInvoke = EQUALS_RETURN_ADDRESS(m_ControlPC, RhpCallFilterFunclet2);
#if defined(UNIX_AMD64_ABI)
SP = (PTR_uintptr_t)(m_RegDisplay.SP);
if (isFilterInvoke)
{
SP++; // stack alignment
}
else
{
// Save the preserved regs portion of the REGDISPLAY across the unwind through the C# EH dispatch code.
m_funcletPtrs.pRbp = m_RegDisplay.pRbp;
m_funcletPtrs.pRbx = m_RegDisplay.pRbx;
m_funcletPtrs.pR12 = m_RegDisplay.pR12;
m_funcletPtrs.pR13 = m_RegDisplay.pR13;
m_funcletPtrs.pR14 = m_RegDisplay.pR14;
m_funcletPtrs.pR15 = m_RegDisplay.pR15;
if (EQUALS_RETURN_ADDRESS(m_ControlPC, RhpCallCatchFunclet2))
{
SP += 6 + 1; // 6 locals and stack alignment
}
else
{
SP += 3; // 3 locals
}
}
m_RegDisplay.pRbp = SP++;
m_RegDisplay.pRbx = SP++;
m_RegDisplay.pR12 = SP++;
m_RegDisplay.pR13 = SP++;
m_RegDisplay.pR14 = SP++;
m_RegDisplay.pR15 = SP++;
#elif defined(TARGET_AMD64)
static const int ArgumentsScratchAreaSize = 4 * 8;
PTR_Fp128 xmm = (PTR_Fp128)(m_RegDisplay.SP + ArgumentsScratchAreaSize);
for (int i = 0; i < 10; i++)
{
m_RegDisplay.Xmm[i] = *xmm++;
}
SP = (PTR_uintptr_t)xmm;
if (isFilterInvoke)
{
SP++; // stack alignment
}
else
{
// Save the preserved regs portion of the REGDISPLAY across the unwind through the C# EH dispatch code.
m_funcletPtrs.pRbp = m_RegDisplay.pRbp;
m_funcletPtrs.pRdi = m_RegDisplay.pRdi;
m_funcletPtrs.pRsi = m_RegDisplay.pRsi;
m_funcletPtrs.pRbx = m_RegDisplay.pRbx;
m_funcletPtrs.pR12 = m_RegDisplay.pR12;
m_funcletPtrs.pR13 = m_RegDisplay.pR13;
m_funcletPtrs.pR14 = m_RegDisplay.pR14;