Import LLVM 10.0.0 release including clang, lld and lldb.

ok hackroom
tested by plenty

1 files changed, 170 insertions, 0 deletions

diff --git a/gnu/llvm/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp b/gnu/llvm/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp
new file mode 100644
index 00000000000..77361ef705f
--- /dev/null
+++ b/gnu/llvm/lldb/source/Plugins/Process/MacOSX-Kernel/ThreadKDP.cpp
@@ -0,0 +1,170 @@
+//===-- ThreadKDP.cpp -------------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "ThreadKDP.h"
+
+#include "lldb/Host/SafeMachO.h"
+
+#include "lldb/Breakpoint/Watchpoint.h"
+#include "lldb/Target/Process.h"
+#include "lldb/Target/RegisterContext.h"
+#include "lldb/Target/StopInfo.h"
+#include "lldb/Target/Target.h"
+#include "lldb/Target/Unwind.h"
+#include "lldb/Utility/ArchSpec.h"
+#include "lldb/Utility/DataExtractor.h"
+#include "lldb/Utility/State.h"
+#include "lldb/Utility/StreamString.h"
+
+#include "Plugins/Process/Utility/StopInfoMachException.h"
+#include "ProcessKDP.h"
+#include "ProcessKDPLog.h"
+#include "RegisterContextKDP_arm.h"
+#include "RegisterContextKDP_arm64.h"
+#include "RegisterContextKDP_i386.h"
+#include "RegisterContextKDP_x86_64.h"
+
+#include <memory>
+
+using namespace lldb;
+using namespace lldb_private;
+
+// Thread Registers
+
+ThreadKDP::ThreadKDP(Process &process, lldb::tid_t tid)
+    : Thread(process, tid), m_thread_name(), m_dispatch_queue_name(),
+      m_thread_dispatch_qaddr(LLDB_INVALID_ADDRESS) {
+  Log *log = ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_THREAD);
+  LLDB_LOG(log, "this = {0}, tid = {1:x}", this, GetID());
+}
+
+ThreadKDP::~ThreadKDP() {
+  Log *log = ProcessKDPLog::GetLogIfAllCategoriesSet(KDP_LOG_THREAD);
+  LLDB_LOG(log, "this = {0}, tid = {1:x}", this, GetID());
+  DestroyThread();
+}
+
+const char *ThreadKDP::GetName() {
+  if (m_thread_name.empty())
+    return nullptr;
+  return m_thread_name.c_str();
+}
+
+const char *ThreadKDP::GetQueueName() { return nullptr; }
+
+void ThreadKDP::RefreshStateAfterStop() {
+  // Invalidate all registers in our register context. We don't set "force" to
+  // true because the stop reply packet might have had some register values
+  // that were expedited and these will already be copied into the register
+  // context by the time this function gets called. The KDPRegisterContext
+  // class has been made smart enough to detect when it needs to invalidate
+  // which registers are valid by putting hooks in the register read and
+  // register supply functions where they check the process stop ID and do the
+  // right thing.
+  const bool force = false;
+  lldb::RegisterContextSP reg_ctx_sp(GetRegisterContext());
+  if (reg_ctx_sp)
+    reg_ctx_sp->InvalidateIfNeeded(force);
+}
+
+bool ThreadKDP::ThreadIDIsValid(lldb::tid_t thread) { return thread != 0; }
+
+void ThreadKDP::Dump(Log *log, uint32_t index) {}
+
+bool ThreadKDP::ShouldStop(bool &step_more) { return true; }
+lldb::RegisterContextSP ThreadKDP::GetRegisterContext() {
+  if (!m_reg_context_sp)
+    m_reg_context_sp = CreateRegisterContextForFrame(nullptr);
+  return m_reg_context_sp;
+}
+
+lldb::RegisterContextSP
+ThreadKDP::CreateRegisterContextForFrame(StackFrame *frame) {
+  lldb::RegisterContextSP reg_ctx_sp;
+  uint32_t concrete_frame_idx = 0;
+
+  if (frame)
+    concrete_frame_idx = frame->GetConcreteFrameIndex();
+
+  if (concrete_frame_idx == 0) {
+    ProcessSP process_sp(CalculateProcess());
+    if (process_sp) {
+      switch (static_cast<ProcessKDP *>(process_sp.get())
+                  ->GetCommunication()
+                  .GetCPUType()) {
+      case llvm::MachO::CPU_TYPE_ARM:
+        reg_ctx_sp =
+            std::make_shared<RegisterContextKDP_arm>(*this, concrete_frame_idx);
+        break;
+      case llvm::MachO::CPU_TYPE_ARM64:
+        reg_ctx_sp = std::make_shared<RegisterContextKDP_arm64>(
+            *this, concrete_frame_idx);
+        break;
+      case llvm::MachO::CPU_TYPE_I386:
+        reg_ctx_sp = std::make_shared<RegisterContextKDP_i386>(
+            *this, concrete_frame_idx);
+        break;
+      case llvm::MachO::CPU_TYPE_X86_64:
+        reg_ctx_sp = std::make_shared<RegisterContextKDP_x86_64>(
+            *this, concrete_frame_idx);
+        break;
+      default:
+        llvm_unreachable("Add CPU type support in KDP");
+      }
+    }
+  } else {
+    Unwind *unwinder = GetUnwinder();
+    if (unwinder != nullptr)
+      reg_ctx_sp = unwinder->CreateRegisterContextForFrame(frame);
+  }
+  return reg_ctx_sp;
+}
+
+bool ThreadKDP::CalculateStopInfo() {
+  ProcessSP process_sp(GetProcess());
+  if (process_sp) {
+    if (m_cached_stop_info_sp) {
+      SetStopInfo(m_cached_stop_info_sp);
+    } else {
+      SetStopInfo(StopInfo::CreateStopReasonWithSignal(*this, SIGSTOP));
+    }
+    return true;
+  }
+  return false;
+}
+
+void ThreadKDP::SetStopInfoFrom_KDP_EXCEPTION(
+    const DataExtractor &exc_reply_packet) {
+  lldb::offset_t offset = 0;
+  uint8_t reply_command = exc_reply_packet.GetU8(&offset);
+  if (reply_command == CommunicationKDP::KDP_EXCEPTION) {
+    offset = 8;
+    const uint32_t count = exc_reply_packet.GetU32(&offset);
+    if (count >= 1) {
+      // const uint32_t cpu = exc_reply_packet.GetU32 (&offset);
+      offset += 4; // Skip the useless CPU field
+      const uint32_t exc_type = exc_reply_packet.GetU32(&offset);
+      const uint32_t exc_code = exc_reply_packet.GetU32(&offset);
+      const uint32_t exc_subcode = exc_reply_packet.GetU32(&offset);
+      // We have to make a copy of the stop info because the thread list will
+      // iterate through the threads and clear all stop infos..
+
+      // Let the StopInfoMachException::CreateStopReasonWithMachException()
+      // function update the PC if needed as we might hit a software breakpoint
+      // and need to decrement the PC (i386 and x86_64 need this) and KDP
+      // doesn't do this for us.
+      const bool pc_already_adjusted = false;
+      const bool adjust_pc_if_needed = true;
+
+      m_cached_stop_info_sp =
+          StopInfoMachException::CreateStopReasonWithMachException(
+              *this, exc_type, 2, exc_code, exc_subcode, 0, pc_already_adjusted,
+              adjust_pc_if_needed);
+    }
+  }
+}