Remove old local-only linux debugging code

Summary:
Currently, the local-only path fails about 50% of the tests, which means that: a) nobody is using
it; and b) the remote debugging path is much more stable. This commit removes the local-only
linux debugging code (ProcessLinux) and makes remote-loopback the only way to debug local
applications (the same architecture as OSX). The ProcessPOSIX code is moved to the FreeBSD
directory, which is now the only user of this class. Hopefully, FreeBSD will soon move to the new
architecture as well and then this code can be removed completely.

Test Plan: Test suite passes via remote stub.

Reviewers: emaste, vharron, ovyalov, clayborg

Subscribers: tberghammer, emaste, lldb-commits

Differential Revision: http://reviews.llvm.org/D10661

llvm-svn: 240543

1 files changed, 322 insertions, 0 deletions

diff --git a/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
new file mode 100644
index 00000000000..d79def52499
--- /dev/null
+++ b/lldb/source/Plugins/Process/FreeBSD/RegisterContextPOSIXProcessMonitor_arm64.cpp
@@ -0,0 +1,322 @@
+//===-- RegisterContextPOSIXProcessMonitor_arm64.cpp -----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===---------------------------------------------------------------------===//
+
+#include "lldb/Core/DataBufferHeap.h"
+#include "lldb/Core/RegisterValue.h"
+#include "lldb/Target/Thread.h"
+
+#include "Plugins/Process/Utility/RegisterContextPOSIX_arm64.h"
+#include "ProcessPOSIX.h"
+#include "ProcessMonitor.h"
+#include "RegisterContextPOSIXProcessMonitor_arm64.h"
+
+#define REG_CONTEXT_SIZE (GetGPRSize())
+
+using namespace lldb;
+using namespace lldb_private;
+
+RegisterContextPOSIXProcessMonitor_arm64::RegisterContextPOSIXProcessMonitor_arm64(lldb_private::Thread &thread,
+                                                                                   uint32_t concrete_frame_idx,
+                                                                                   lldb_private::RegisterInfoInterface *register_info)
+    : RegisterContextPOSIX_arm64(thread, concrete_frame_idx, register_info)
+{
+}
+
+ProcessMonitor &
+RegisterContextPOSIXProcessMonitor_arm64::GetMonitor()
+{
+    lldb::ProcessSP base = CalculateProcess();
+    ProcessPOSIX *process = static_cast<ProcessPOSIX*>(base.get());
+    return process->GetMonitor();
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ReadGPR()
+{
+     ProcessMonitor &monitor = GetMonitor();
+     return monitor.ReadGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize());
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ReadFPR()
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.ReadFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::WriteGPR()
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.WriteGPR(m_thread.GetID(), &m_gpr_arm64, GetGPRSize());
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::WriteFPR()
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.WriteFPR(m_thread.GetID(), &m_fpr, sizeof m_fpr);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(const unsigned reg,
+                                                       lldb_private::RegisterValue &value)
+{
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.ReadRegisterValue(m_thread.GetID(),
+                                     GetRegisterOffset(reg),
+                                     GetRegisterName(reg),
+                                     GetRegisterSize(reg),
+                                     value);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(const unsigned reg,
+                                                         const lldb_private::RegisterValue &value)
+{
+    unsigned reg_to_write = reg;
+    lldb_private::RegisterValue value_to_write = value;
+
+    // Check if this is a subregister of a full register.
+    const lldb_private::RegisterInfo *reg_info = GetRegisterInfoAtIndex(reg);
+    if (reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM))
+    {
+        lldb_private::RegisterValue full_value;
+        uint32_t full_reg = reg_info->invalidate_regs[0];
+        const lldb_private::RegisterInfo *full_reg_info = GetRegisterInfoAtIndex(full_reg);
+
+        // Read the full register.
+        if (ReadRegister(full_reg_info, full_value))
+        {
+            lldb_private::Error error;
+            lldb::ByteOrder byte_order = GetByteOrder();
+            uint8_t dst[lldb_private::RegisterValue::kMaxRegisterByteSize];
+
+            // Get the bytes for the full register.
+            const uint32_t dest_size = full_value.GetAsMemoryData (full_reg_info,
+                                                                   dst,
+                                                                   sizeof(dst),
+                                                                   byte_order,
+                                                                   error);
+            if (error.Success() && dest_size)
+            {
+                uint8_t src[lldb_private::RegisterValue::kMaxRegisterByteSize];
+
+                // Get the bytes for the source data.
+                const uint32_t src_size = value.GetAsMemoryData (reg_info, src, sizeof(src), byte_order, error);
+                if (error.Success() && src_size && (src_size < dest_size))
+                {
+                    // Copy the src bytes to the destination.
+                    ::memcpy (dst + (reg_info->byte_offset & 0x1), src, src_size);
+                    // Set this full register as the value to write.
+                    value_to_write.SetBytes(dst, full_value.GetByteSize(), byte_order);
+                    value_to_write.SetType(full_reg_info);
+                    reg_to_write = full_reg;
+                }
+            }
+        }
+    }
+
+    ProcessMonitor &monitor = GetMonitor();
+    return monitor.WriteRegisterValue(m_thread.GetID(),
+                                      GetRegisterOffset(reg_to_write),
+                                      GetRegisterName(reg_to_write),
+                                      value_to_write);
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ReadRegister(const lldb_private::RegisterInfo *reg_info, lldb_private::RegisterValue &value)
+{
+    if (!reg_info)
+        return false;
+
+    const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
+
+    if (IsFPR(reg))
+    {
+        if (!ReadFPR())
+            return false;
+    }
+    else
+    {
+        uint32_t full_reg = reg;
+        bool is_subreg = reg_info->invalidate_regs && (reg_info->invalidate_regs[0] != LLDB_INVALID_REGNUM);
+
+        if (is_subreg)
+        {
+            // Read the full aligned 64-bit register.
+            full_reg = reg_info->invalidate_regs[0];
+        }
+        return ReadRegister(full_reg, value);
+    }
+
+    // Get pointer to m_fpr variable and set the data from it.
+    assert (reg_info->byte_offset < sizeof m_fpr);
+    uint8_t *src = (uint8_t *)&m_fpr + reg_info->byte_offset;
+    switch (reg_info->byte_size)
+    {
+        case 2:
+            value.SetUInt16(*(uint16_t *)src);
+            return true;
+        case 4:
+            value.SetUInt32(*(uint32_t *)src);
+            return true;
+        case 8:
+            value.SetUInt64(*(uint64_t *)src);
+            return true;
+        default:
+            assert(false && "Unhandled data size.");
+            return false;
+    }
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::WriteRegister(const lldb_private::RegisterInfo *reg_info, const lldb_private::RegisterValue &value)
+{
+    const uint32_t reg = reg_info->kinds[lldb::eRegisterKindLLDB];
+
+    if (IsGPR(reg))
+        return WriteRegister(reg, value);
+
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ReadAllRegisterValues(lldb::DataBufferSP &data_sp)
+{
+    bool success = false;
+    data_sp.reset (new lldb_private::DataBufferHeap (REG_CONTEXT_SIZE, 0));
+    if (data_sp && ReadGPR () && ReadFPR ())
+    {
+        uint8_t *dst = data_sp->GetBytes();
+        success = dst != 0;
+
+        if (success)
+        {
+            ::memcpy (dst, &m_gpr_arm64, GetGPRSize());
+            dst += GetGPRSize();
+            ::memcpy (dst, &m_fpr, sizeof m_fpr);
+        }
+    }
+    return success;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::WriteAllRegisterValues(const lldb::DataBufferSP &data_sp)
+{
+    bool success = false;
+    if (data_sp && data_sp->GetByteSize() == REG_CONTEXT_SIZE)
+    {
+        uint8_t *src = data_sp->GetBytes();
+        if (src)
+        {
+            ::memcpy (&m_gpr_arm64, src, GetGPRSize());
+            if (WriteGPR()) {
+                src += GetGPRSize();
+                ::memcpy (&m_fpr, src, sizeof m_fpr);
+                success = WriteFPR();
+            }
+        }
+    }
+    return success;
+}
+
+uint32_t
+RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpoint(lldb::addr_t addr, size_t size,
+                                                                bool read, bool write)
+{
+    const uint32_t num_hw_watchpoints = NumSupportedHardwareWatchpoints();
+    uint32_t hw_index;
+
+    for (hw_index = 0; hw_index < num_hw_watchpoints; ++hw_index)
+    {
+        if (IsWatchpointVacant(hw_index))
+            return SetHardwareWatchpointWithIndex(addr, size,
+                                                  read, write,
+                                                  hw_index);
+    }
+
+    return LLDB_INVALID_INDEX32;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ClearHardwareWatchpoint(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::HardwareSingleStep(bool enable)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::UpdateAfterBreakpoint()
+{
+    // PC points one byte past the int3 responsible for the breakpoint.
+    lldb::addr_t pc;
+
+    if ((pc = GetPC()) == LLDB_INVALID_ADDRESS)
+        return false;
+
+    SetPC(pc - 1);
+    return true;
+}
+
+unsigned
+RegisterContextPOSIXProcessMonitor_arm64::GetRegisterIndexFromOffset(unsigned offset)
+{
+    unsigned reg;
+    for (reg = 0; reg < k_num_registers_arm64; reg++)
+    {
+        if (GetRegisterInfo()[reg].byte_offset == offset)
+            break;
+    }
+    assert(reg < k_num_registers_arm64 && "Invalid register offset.");
+    return reg;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointHit(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::ClearWatchpointHits()
+{
+    return false;
+}
+
+lldb::addr_t
+RegisterContextPOSIXProcessMonitor_arm64::GetWatchpointAddress(uint32_t hw_index)
+{
+    return LLDB_INVALID_ADDRESS;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::IsWatchpointVacant(uint32_t hw_index)
+{
+    return false;
+}
+
+bool
+RegisterContextPOSIXProcessMonitor_arm64::SetHardwareWatchpointWithIndex(lldb::addr_t addr, size_t size,
+                                                                         bool read, bool write,
+                                                                         uint32_t hw_index)
+{
+    return false;
+}
+
+uint32_t
+RegisterContextPOSIXProcessMonitor_arm64::NumSupportedHardwareWatchpoints()
+{
+    return 0;
+}