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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.
// See the LICENSE file in the project root for more information.
#include "createdump.h"
#define FPREG_ErrorOffset(fpregs) *(DWORD*)&((fpregs).rip)
#define FPREG_ErrorSelector(fpregs) *(((WORD*)&((fpregs).rip)) + 2)
#define FPREG_DataOffset(fpregs) *(DWORD*)&((fpregs).rdp)
#define FPREG_DataSelector(fpregs) *(((WORD*)&((fpregs).rdp)) + 2)
ThreadInfo::ThreadInfo(pid_t tid) :
m_tid(tid)
{
}
ThreadInfo::~ThreadInfo()
{
}
bool
ThreadInfo::Initialize(ICLRDataTarget* dataTarget)
{
if (!CrashInfo::GetStatus(m_tid, &m_ppid, &m_tgid, nullptr))
{
return false;
}
if (dataTarget != nullptr)
{
if (!GetRegistersWithDataTarget(dataTarget))
{
return false;
}
}
else {
if (!GetRegistersWithPTrace())
{
return false;
}
}
TRACE("Thread %04x RIP %016llx RSP %016llx\n", m_tid, (unsigned long long)m_gpRegisters.rip, (unsigned long long)m_gpRegisters.rsp);
return true;
}
void
ThreadInfo::ResumeThread()
{
if (ptrace(PTRACE_DETACH, m_tid, nullptr, nullptr) != -1)
{
int waitStatus;
waitpid(m_tid, &waitStatus, __WALL);
}
}
bool
ThreadInfo::GetRegistersWithPTrace()
{
if (ptrace((__ptrace_request)PTRACE_GETREGS, m_tid, nullptr, &m_gpRegisters) == -1)
{
fprintf(stderr, "ptrace(GETREGS, %d) FAILED %d (%s)\n", m_tid, errno, strerror(errno));
return false;
}
if (ptrace((__ptrace_request)PTRACE_GETFPREGS, m_tid, nullptr, &m_fpRegisters) == -1)
{
fprintf(stderr, "ptrace(GETFPREGS, %d) FAILED %d (%s)\n", m_tid, errno, strerror(errno));
return false;
}
#if defined(__i386__)
if (ptrace((__ptrace_request)PTRACE_GETFPXREGS, m_tid, nullptr, &m_fpxRegisters) == -1)
{
fprintf(stderr, "ptrace(GETFPXREGS, %d) FAILED %d (%s)\n", m_tid, errno, strerror(errno));
return false;
}
#endif
return true;
}
bool
ThreadInfo::GetRegistersWithDataTarget(ICLRDataTarget* dataTarget)
{
CONTEXT context;
context.ContextFlags = CONTEXT_ALL;
if (dataTarget->GetThreadContext(m_tid, context.ContextFlags, sizeof(context), reinterpret_cast<PBYTE>(&context)) != S_OK)
{
return false;
}
#if defined(__x86_64__)
m_gpRegisters.rbp = context.Rbp;
m_gpRegisters.rip = context.Rip;
m_gpRegisters.cs = context.SegCs;
m_gpRegisters.eflags = context.EFlags;
m_gpRegisters.ss = context.SegSs;
m_gpRegisters.rsp = context.Rsp;
m_gpRegisters.rdi = context.Rdi;
m_gpRegisters.rsi = context.Rsi;
m_gpRegisters.rbx = context.Rbx;
m_gpRegisters.rdx = context.Rdx;
m_gpRegisters.rcx = context.Rcx;
m_gpRegisters.rax = context.Rax;
m_gpRegisters.orig_rax = context.Rax;
m_gpRegisters.r8 = context.R8;
m_gpRegisters.r9 = context.R9;
m_gpRegisters.r10 = context.R10;
m_gpRegisters.r11 = context.R11;
m_gpRegisters.r12 = context.R12;
m_gpRegisters.r13 = context.R13;
m_gpRegisters.r14 = context.R14;
m_gpRegisters.r15 = context.R15;
m_gpRegisters.ds = context.SegDs;
m_gpRegisters.es = context.SegEs;
m_gpRegisters.fs = context.SegFs;
m_gpRegisters.gs = context.SegGs;
m_gpRegisters.fs_base = 0;
m_gpRegisters.gs_base = 0;
m_fpRegisters.cwd = context.FltSave.ControlWord;
m_fpRegisters.swd = context.FltSave.StatusWord;
m_fpRegisters.ftw = context.FltSave.TagWord;
m_fpRegisters.fop = context.FltSave.ErrorOpcode;
FPREG_ErrorOffset(m_fpRegisters) = context.FltSave.ErrorOffset;
FPREG_ErrorSelector(m_fpRegisters) = context.FltSave.ErrorSelector;
FPREG_DataOffset(m_fpRegisters) = context.FltSave.DataOffset;
FPREG_DataSelector(m_fpRegisters) = context.FltSave.DataSelector;
m_fpRegisters.mxcsr = context.FltSave.MxCsr;
m_fpRegisters.mxcr_mask = context.FltSave.MxCsr_Mask;
assert(sizeof(context.FltSave.FloatRegisters) == sizeof(m_fpRegisters.st_space));
memcpy(m_fpRegisters.st_space, context.FltSave.FloatRegisters, sizeof(m_fpRegisters.st_space));
assert(sizeof(context.FltSave.XmmRegisters) == sizeof(m_fpRegisters.xmm_space));
memcpy(m_fpRegisters.xmm_space, context.FltSave.XmmRegisters, sizeof(m_fpRegisters.xmm_space));
#else
#error Platform not supported
#endif
return true;
}
void
ThreadInfo::GetThreadStack(const CrashInfo& crashInfo, uint64_t* startAddress, size_t* size) const
{
*startAddress = m_gpRegisters.rsp & PAGE_MASK;
*size = 4 * PAGE_SIZE;
const MemoryRegion* region = CrashInfo::SearchMemoryRegions(crashInfo.OtherMappings(), *startAddress);
if (region != nullptr) {
// Use the mapping found for the size of the thread's stack
*size = region->EndAddress() - *startAddress;
if (g_diagnostics)
{
TRACE("Thread %04x stack found in other mapping (size %08lx): ", m_tid, *size);
region->Trace();
}
}
}
void
ThreadInfo::GetThreadCode(uint64_t* startAddress, size_t* size) const
{
*startAddress = m_gpRegisters.rip & PAGE_MASK;
*size = PAGE_SIZE;
}
void
ThreadInfo::GetThreadContext(uint32_t flags, CONTEXT* context) const
{
context->ContextFlags = flags;
#if defined(__x86_64__)
if ((flags & CONTEXT_CONTROL) == CONTEXT_CONTROL)
{
context->Rbp = m_gpRegisters.rbp;
context->Rip = m_gpRegisters.rip;
context->SegCs = m_gpRegisters.cs;
context->EFlags = m_gpRegisters.eflags;
context->SegSs = m_gpRegisters.ss;
context->Rsp = m_gpRegisters.rsp;
}
if ((flags & CONTEXT_INTEGER) == CONTEXT_INTEGER)
{
context->Rdi = m_gpRegisters.rdi;
context->Rsi = m_gpRegisters.rsi;
context->Rbx = m_gpRegisters.rbx;
context->Rdx = m_gpRegisters.rdx;
context->Rcx = m_gpRegisters.rcx;
context->Rax = m_gpRegisters.rax;
context->R8 = m_gpRegisters.r8;
context->R9 = m_gpRegisters.r9;
context->R10 = m_gpRegisters.r10;
context->R11 = m_gpRegisters.r11;
context->R12 = m_gpRegisters.r12;
context->R13 = m_gpRegisters.r13;
context->R14 = m_gpRegisters.r14;
context->R15 = m_gpRegisters.r15;
}
if ((flags & CONTEXT_SEGMENTS) == CONTEXT_SEGMENTS)
{
context->SegDs = m_gpRegisters.ds;
context->SegEs = m_gpRegisters.es;
context->SegFs = m_gpRegisters.fs;
context->SegGs = m_gpRegisters.gs;
}
if ((flags & CONTEXT_FLOATING_POINT) == CONTEXT_FLOATING_POINT)
{
context->FltSave.ControlWord = m_fpRegisters.cwd;
context->FltSave.StatusWord = m_fpRegisters.swd;
context->FltSave.TagWord = m_fpRegisters.ftw;
context->FltSave.ErrorOpcode = m_fpRegisters.fop;
context->FltSave.ErrorOffset = FPREG_ErrorOffset(m_fpRegisters);
context->FltSave.ErrorSelector = FPREG_ErrorSelector(m_fpRegisters);
context->FltSave.DataOffset = FPREG_DataOffset(m_fpRegisters);
context->FltSave.DataSelector = FPREG_DataSelector(m_fpRegisters);
context->FltSave.MxCsr = m_fpRegisters.mxcsr;
context->FltSave.MxCsr_Mask = m_fpRegisters.mxcr_mask;
assert(sizeof(context->FltSave.FloatRegisters) == sizeof(m_fpRegisters.st_space));
memcpy(context->FltSave.FloatRegisters, m_fpRegisters.st_space, sizeof(context->FltSave.FloatRegisters));
assert(sizeof(context->FltSave.XmmRegisters) == sizeof(m_fpRegisters.xmm_space));
memcpy(context->FltSave.XmmRegisters, m_fpRegisters.xmm_space, sizeof(context->FltSave.XmmRegisters));
}
// TODO: debug registers?
#else
#error Platform not supported
#endif
}
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